/*! tailwindcss v4.3.3 | MIT License | https://tailwindcss.com */
@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-border-style:solid;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial}::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-border-style:solid;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial}}}@layer theme{:root,:host{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--radius-sm:.25rem;--radius-md:.375rem;--radius-lg:.5rem;--shadow-sm:0 1px 3px 0 #0000001a, 0 1px 2px -1px #0000001a;--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1);--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before{box-sizing:border-box;border:0 solid;margin:0;padding:0}::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring:where(:not(iframe)){outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.invisible{visibility:hidden}.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.absolute{position:absolute}.fixed{position:fixed}.relative{position:relative}.static{position:static}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.block{display:block}.contents{display:contents}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline{display:inline}.table{display:table}.shrink{flex-shrink:1}.grow{flex-grow:1}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.rounded{border-radius:.25rem}.border{border-style:var(--tw-border-style);border-width:1px}.lowercase{text-transform:lowercase}.underline{text-decoration-line:underline}.shadow{--tw-shadow:0 1px 3px 0 var(--tw-shadow-color,#0000001a), 0 1px 2px -1px var(--tw-shadow-color,#0000001a);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.ring{--tw-ring-shadow:var(--tw-ring-inset,) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.sepia{--tw-sepia:sepia(100%);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}}:root{color:#172033;font-synthesis:none;text-rendering:optimizelegibility;--ink:#172033;--muted:#687287;--line:#e6e9f0;--surface:#fff;--surface-soft:#f8f9fc;--brand:#5b5ce2;--brand-dark:#4142b7;--brand-soft:#eeefff;--success:#138a63;--success-soft:#e9f8f2;--warning-soft:#fff5df;--radius-sm:14px;--radius-md:20px;--radius-lg:28px;--shadow:0 12px 32px #17203312;background:#f5f7fb;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}html{background:#f5f7fb;width:100%;max-width:100%;overflow-x:clip}body{background:#f5f7fb;width:100%;min-width:320px;max-width:100%;min-height:100vh;margin:0;overflow-x:clip}#root{width:100%;min-width:0;max-width:100%;overflow-x:clip}button,input{font:inherit}button{-webkit-tap-highlight-color:transparent}button:focus-visible{outline-offset:3px;outline:3px solid #5b5ce247}.app-icon{flex:none;width:1em;height:1em;display:block}.app-shell{width:100%;min-width:0;max-width:100%;min-height:100vh}.app-main{width:100%;min-width:0;max-width:780px;padding-bottom:calc(104px + env(safe-area-inset-bottom));margin:0 auto}.page{gap:20px;width:100%;min-width:0;max-width:100%;padding:18px 16px 30px;display:grid}h1,h2,h3,p{margin-top:0}h1{letter-spacing:-.035em;margin-bottom:7px;font-size:clamp(1.75rem,7vw,2.35rem);line-height:1.08}h2{letter-spacing:-.018em;margin-bottom:6px;font-size:1.16rem;line-height:1.2}h3{margin-bottom:4px;font-size:1rem;line-height:1.25}p{margin-bottom:0;line-height:1.55}.muted{color:var(--muted);font-size:.92rem}.eyebrow{color:#70798d;letter-spacing:.09em;text-transform:uppercase;margin-bottom:6px;font-size:.72rem;font-weight:800}.grow{flex:1;min-width:0}.row-between{justify-content:space-between;align-items:center;gap:12px;display:flex}.stack-md{gap:12px;display:grid}.stack-lg{gap:16px;display:grid}.hero-header,.simple-header{padding-top:max(8px, env(safe-area-inset-top))}.hero-header{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.streak-pill{white-space:nowrap;background:#fff8e9;border:1px solid #f1dfc0;border-radius:17px;grid-template-columns:auto auto;place-items:center start;column-gap:5px;padding:10px 12px;display:grid}.streak-pill>.app-icon{color:#a66a13;width:1.08rem;height:1.08rem}.streak-pill strong{font-size:1.05rem}.streak-pill span:last-child{color:#8a6730;text-transform:uppercase;letter-spacing:.06em;grid-column:1/-1;padding-left:1px;font-size:.66rem;font-weight:700}.demo-banner{border-radius:var(--radius-sm);color:#565884;background:#f5f5ff;border:1px solid #dadcf8;align-items:flex-start;gap:8px;padding:10px 12px;font-size:.77rem;line-height:1.45;display:flex}.demo-banner strong{color:#34356c;flex:none}.quest-summary-card{border-radius:var(--radius-lg);color:#fff;background:linear-gradient(145deg,#171b36 0%,#2a2d59 100%);padding:17px;box-shadow:0 18px 44px #171b362e}.quest-summary-card .eyebrow{color:#b9bbe4}.quest-summary-top{justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:15px;display:flex}.quest-summary-top h2{max-width:210px;font-size:1.35rem}.time-badge{color:#f3f4ff;background:#ffffff14;border:1px solid #ffffff21;border-radius:999px;padding:8px 10px;font-size:.8rem;font-weight:700}.summary-meta{color:#cfd1ef;justify-content:space-between;margin-top:8px;font-size:.74rem;display:flex}.quest-summary-card .progress-track{background:#ffffff21}.quest-summary-card .progress-fill{background:#9ea1ff}.progress-wrap{width:100%}.progress-track{background:#e8ebf2;border-radius:99px;height:9px;overflow:hidden;box-shadow:inset 0 0 0 1px #17203306}.progress-track.compact{height:7px}.progress-fill{border-radius:inherit;background:var(--brand);height:100%;transition:width .35s}.section-heading{justify-content:space-between;align-items:center;gap:16px;margin-bottom:12px;display:flex}.section-heading h2{margin-bottom:0;font-size:1.12rem}.text-button{min-height:44px;color:var(--brand-dark);cursor:pointer;background:0 0;border:0;border-radius:10px;padding:8px 6px;font-size:.84rem;font-weight:800}.text-button:hover{background:var(--brand-soft)}.quest-list{gap:9px;display:grid}.quest-card{border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);grid-template-columns:34px 1fr 18px;align-items:start;gap:10px;padding:14px;transition:transform .18s,border-color .18s,background .18s;display:grid;position:relative;box-shadow:0 6px 18px #17203309}.quest-card.complete{background:#fbfffd;border-color:#cce9dd}.quest-card.complete .quest-copy h3,.quest-card.complete .quest-copy>p{color:#87908b;text-decoration-color:#c8ceca}.complete-toggle{color:#fff;cursor:pointer;background:#fff;border:2px solid #cfd4df;border-radius:12px;place-items:center;width:34px;height:34px;margin-top:2px;display:grid}.complete-toggle.checked{border-color:var(--success);background:var(--success)}.complete-toggle .app-icon{width:1rem;height:1rem}.quest-copy{min-width:0}.quest-title-row{color:#555f72;align-items:center;gap:7px;margin-bottom:6px;font-size:.8rem;display:flex}.quest-subject-icon{background:var(--brand-soft);width:23px;height:23px;color:var(--brand-dark);border-radius:8px;place-items:center;font-size:.68rem;font-weight:900;display:grid}.quest-copy h3{margin-bottom:4px;font-size:1rem}.quest-copy>p{color:var(--muted);font-size:.85rem}.quest-meta{color:#697388;gap:14px;margin-top:9px;font-size:.75rem;font-weight:700;display:flex}.quest-meta>span{align-items:center;gap:4px;display:inline-flex}.quest-meta .app-icon{width:.9rem;height:.9rem}.mini-badge{background:var(--brand-soft);color:var(--brand-dark);border-radius:999px;padding:4px 7px;font-size:.63rem;font-weight:800}.chevron{color:#a8afbc;align-self:center;font-size:1.55rem;font-weight:300}.subject-grid{grid-template-columns:1fr;gap:10px;display:grid}.subject-card,.subject-detail-card,.info-card,.profile-card,.settings-card,.auth-foundation-card,.overall-progress-card,.progress-row-card,.weekly-card,.achievement-card{border:1px solid var(--line);background:var(--surface);box-shadow:0 6px 20px #17203309}.subject-card{border-radius:var(--radius-md);padding:15px}.subject-card-top{justify-content:space-between;align-items:center;margin-bottom:15px;display:flex}.subject-card h3{margin-bottom:5px}.subject-card p{min-height:38px;color:var(--muted);margin-bottom:14px;font-size:.76rem}.subject-icon{background:var(--brand-soft);width:34px;height:34px;color:var(--brand-dark);border-radius:11px;flex:none;place-items:center;font-size:.8rem;font-weight:900;display:inline-grid}.subject-icon.large{border-radius:14px;width:44px;height:44px}.milestone-card{border-radius:var(--radius-md);background:#fff9ed;border:1px solid #f4e7c9;grid-template-columns:42px 1fr auto;align-items:center;gap:12px;padding:16px;display:grid}.milestone-icon{color:#8f6211;background:#ffe8ae;border-radius:14px;place-items:center;width:42px;height:42px;display:grid}.milestone-icon .app-icon{width:1.25rem;height:1.25rem}.milestone-copy h3{margin-bottom:3px}.milestone-copy p:last-child{color:#75694f;font-size:.76rem}.milestone-count{color:#765715;background:#fff;border-radius:99px;place-items:center;width:34px;height:34px;font-size:.8rem;font-weight:900;display:grid}.rest-card{border-radius:var(--radius-lg);background:#f7f8ff;border:1px solid #dbe1f5;grid-template-columns:auto 1fr;gap:14px;padding:20px;display:grid}.rest-icon{width:48px;height:48px;color:var(--brand-dark);background:#edf0ff;border-radius:15px;flex:none;place-items:center;display:grid}.rest-icon .app-icon{width:1.55rem;height:1.55rem}.rest-card p:last-child{color:var(--muted);font-size:.86rem}.subject-detail-card{border-radius:var(--radius-md);padding:17px}.subject-detail-head{align-items:center;gap:12px;margin-bottom:14px;display:flex}.subject-detail-head h2{margin-bottom:2px}.subject-detail-head p{color:var(--muted);font-size:.79rem}.chapter-list{border-top:1px solid var(--line);margin-top:15px;display:grid}.chapter-row{color:#586276;border-bottom:1px solid #f0f2f6;justify-content:space-between;gap:14px;padding:13px 0;font-size:.81rem;display:flex}.chapter-row:last-child{border-bottom:0;padding-bottom:0}.chapter-row span:last-child{text-align:right;color:#7d8698;font-size:.76rem}.chapter-row .status-done{font-weight:800;color:var(--success)!important}.info-card{border-radius:var(--radius-md);padding:17px}.info-card p{color:var(--muted);font-size:.84rem}.overall-progress-card{border-radius:var(--radius-lg);grid-template-columns:112px 1fr;align-items:center;gap:18px;padding:18px;display:grid}.progress-ring{--value:0deg;aspect-ratio:1;background:conic-gradient(var(--brand) var(--value), #edf0f5 0);border-radius:50%;place-items:center;width:108px;display:grid}.progress-ring:before{content:"";aspect-ratio:1;background:#fff;border-radius:50%;grid-area:1/1;width:82px}.progress-ring>div{z-index:1;grid-area:1/1;justify-items:center;display:grid}.progress-ring strong{font-size:1.25rem}.progress-ring span{color:var(--muted);font-size:.67rem}.overall-progress-card h2{font-size:1.15rem}.overall-progress-card p:last-child{color:var(--muted);font-size:.78rem}.progress-row-card{border-radius:var(--radius-md);align-items:center;gap:12px;padding:14px;display:flex}.progress-row-card .row-between{margin-bottom:8px;font-size:.82rem}.weekly-card{border-radius:var(--radius-md);gap:18px;padding:17px;display:grid}.weekly-card p:last-child{color:var(--muted);font-size:.8rem}.week-dots{grid-template-columns:repeat(7,1fr);gap:7px;display:grid}.week-dots span{aspect-ratio:1;color:#7b8495;background:#f0f2f6;border-radius:12px;place-items:center;font-size:.72rem;font-weight:900;display:grid}.week-dots .done{background:var(--success-soft);color:var(--success)}.week-dots .rest{color:var(--brand-dark);background:#edf0ff}.achievement-grid{gap:12px;display:grid}.achievement-card{border-radius:var(--radius-md);align-items:flex-start;gap:14px;padding:16px;display:flex}.achievement-card.unlocked{background:#fffdf7;border-color:#eadbaa}.achievement-icon{color:#767e8e;background:#f0f1f5;border-radius:15px;flex:none;place-items:center;width:44px;height:44px;display:grid}.achievement-icon .app-icon{width:1.25rem;height:1.25rem}.achievement-card.unlocked .achievement-icon{color:#94680d;background:#ffedb8}.achievement-card h2{font-size:.98rem}.achievement-card p{color:var(--muted);margin-bottom:10px;font-size:.8rem}.profile-card{border-radius:var(--radius-md);align-items:center;gap:12px;padding:16px;display:flex}.avatar{color:#fff;background:#1f2442;border-radius:16px;place-items:center;width:48px;height:48px;font-weight:900;display:grid}.profile-card h2{margin-bottom:2px}.profile-card p{color:var(--muted);font-size:.77rem}.connection-badge{color:#687182;background:#f1f2f5;border-radius:99px;padding:5px 8px;font-size:.65rem;font-weight:800}.connection-badge.connected{background:var(--success-soft);color:var(--success)}.settings-card{border-radius:var(--radius-md);overflow:hidden}.setting-row{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:16px;padding:15px 16px;display:flex}.setting-row:last-child{border-bottom:0}.setting-row strong{font-size:.85rem}.setting-row p{color:var(--muted);margin-top:3px;font-size:.72rem}.setting-row>span{color:#4d5669;text-align:right;font-size:.76rem;font-weight:800}.auth-foundation-card{border-radius:var(--radius-md);padding:17px}.auth-foundation-card p:last-child{color:var(--muted);font-size:.8rem}.bottom-nav{z-index:20;padding:6px 7px max(7px, env(safe-area-inset-bottom));-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#fffffff7;border-top:1px solid #dadee7e6;grid-template-columns:repeat(5,1fr);display:grid;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -8px 30px #1720330f}.nav-item{color:#7f8899;cursor:pointer;background:0 0;border:0;border-radius:14px;place-items:center;gap:4px;min-height:58px;padding:5px 2px;font-size:.68rem;font-weight:750;display:grid}.nav-item.active{color:var(--brand-dark);background:#f3f3ff}.nav-icon{width:1.28rem;height:1.28rem}.desktop-rail{display:none}@media (min-width:520px){.page{padding-inline:24px}.subject-grid{grid-template-columns:repeat(3,1fr)}.subject-card p{min-height:58px}.weekly-card{grid-template-columns:1fr 1fr;align-items:center}}@media (min-width:900px){body{background:#f2f4f8}.app-shell{grid-template-columns:248px minmax(0,1fr);display:grid}.desktop-rail{background:#f8f9fc;border-right:1px solid #e0e4ec;flex-direction:column;align-self:start;height:100vh;padding:26px 18px 22px;display:flex;position:sticky;top:0}.desktop-brand{gap:7px;padding:0 8px 24px;display:grid}.desktop-brand-logo{object-fit:contain;object-position:left center;width:172px;max-width:100%;height:auto}.desktop-brand p{color:var(--muted);margin:0 0 0 2px;font-size:.69rem}.desktop-nav{gap:5px;display:grid}.desktop-nav-item{color:#6d7689;text-align:left;cursor:pointer;background:0 0;border:0;border-radius:13px;grid-template-columns:22px 1fr;align-items:center;gap:11px;width:100%;min-height:46px;padding:10px 12px;font-size:.79rem;font-weight:780;display:grid}.desktop-nav-item .app-icon{width:1.15rem;height:1.15rem}.desktop-nav-item:hover{color:#3d465a;background:#f0f2f7}.desktop-nav-item.active{color:var(--brand-dark);background:#ececff}.desktop-release-card{background:#fff;border:1px solid #e2e5ed;border-radius:15px;margin-top:auto;padding:13px;box-shadow:0 6px 20px #17203309}.desktop-release-card>span{color:#8b93a2;letter-spacing:.08em;text-transform:uppercase;margin-bottom:5px;font-size:.61rem;font-weight:850;display:block}.desktop-release-card strong{color:#313a4d;font-size:.76rem;display:block}.desktop-release-card p{color:var(--muted);margin-top:3px;font-size:.66rem;line-height:1.4}.app-main{max-width:1500px;padding-bottom:40px}.page{width:min(100%,1120px);margin-inline:auto;padding:34px 32px 48px}.bottom-nav{display:none}}.auth-page{background:#f5f7fb;min-height:100vh;display:grid}.auth-brand-panel{display:none}.auth-form-panel{min-height:100vh;padding:max(24px, env(safe-area-inset-top)) 16px max(24px, env(safe-area-inset-bottom));place-items:center;display:grid}.auth-form-card{border:1px solid var(--line);background:#fffffffa;border-radius:26px;width:min(100%,430px);padding:22px;box-shadow:0 22px 60px #1720331a}.auth-mobile-brand{align-items:center;margin-bottom:26px;display:flex}.auth-mobile-brand img{object-fit:contain;width:150px;height:auto}.auth-loading-logo{object-fit:contain;width:170px;height:auto}.auth-heading{margin-bottom:22px}.auth-heading h2{letter-spacing:-.035em;margin-bottom:7px;font-size:1.65rem}.auth-heading>p:last-child{color:var(--muted);font-size:.88rem}.auth-form{gap:9px;display:grid}.auth-form label{color:#3c4558;font-size:.78rem;font-weight:800}.auth-form input{width:100%;min-height:50px;color:var(--ink);background:#fff;border:1px solid #d9dde6;border-radius:14px;outline:none;padding:12px 14px;font-size:.93rem;transition:border-color .16s,box-shadow .16s}.auth-form input:focus{border-color:#8c8def;box-shadow:0 0 0 4px #5b5ce21a}.auth-form input:disabled{color:#8a92a1;background:#f5f6f8}.otp-input{letter-spacing:.24em;text-align:center;font-weight:850;font-size:1.15rem!important}.primary-button,.secondary-button{cursor:pointer;border-radius:14px;min-height:48px;padding:11px 15px;font-weight:850;transition:transform .16s,box-shadow .16s,background .16s}.primary-button{background:var(--brand);color:#fff;border:1px solid #4c4dd0;box-shadow:0 9px 22px #5b5ce233}.primary-button:hover:not(:disabled){background:var(--brand-dark);transform:translateY(-1px)}.secondary-button{color:#333c50;background:#fff;border:1px solid #dce0e9}.secondary-button:hover:not(:disabled){background:#f8f9fc}.primary-button:disabled,.secondary-button:disabled,.text-button:disabled{opacity:.58;cursor:not-allowed;transform:none}.auth-submit{width:100%;margin-top:7px}.auth-divider{color:#9aa1af;text-transform:uppercase;letter-spacing:.08em;grid-template-columns:1fr auto 1fr;align-items:center;gap:10px;margin:18px 0;font-size:.7rem;display:grid}.auth-divider:before,.auth-divider:after{content:"";background:var(--line);height:1px}.google-button{justify-content:center;align-items:center;gap:10px;width:100%;display:flex}.google-g{color:#365899;background:#fff;border:1px solid #e2e4e9;border-radius:50%;place-items:center;width:24px;height:24px;font-size:.75rem;font-weight:900;display:grid}.auth-code-actions{justify-content:space-between;gap:10px;margin-top:10px;display:flex}.auth-notice,.auth-error{border-radius:12px;margin-top:14px;padding:10px 12px;font-size:.76rem;line-height:1.45}.auth-notice{background:var(--success-soft);color:#176d52;border:1px solid #cce9dd}.auth-error{color:#9f3240;background:#fff1f2;border:1px solid #f0cfd3}.auth-footnote{color:#858d9d;text-align:center;margin-top:18px;font-size:.7rem}.auth-loading{color:#4d5669;background:#f5f7fb;align-content:center;place-items:center;gap:12px;min-height:100vh;display:grid}.auth-loading-mark{border-radius:15px;width:46px;height:46px}.account-actions-card{border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);gap:14px;padding:17px;display:grid;box-shadow:0 6px 20px #17203309}.account-actions-card p:not(.eyebrow):not(.auth-error){color:var(--muted);font-size:.8rem}.sign-out-button{width:100%}@media (min-width:900px){.auth-page{background:#eef1f7;grid-template-columns:minmax(360px,.92fr) minmax(520px,1.08fr)}.auth-brand-panel{color:#fff;background:linear-gradient(145deg,#161b36 0%,#292d5c 58%,#3c3f79 100%);flex-direction:column;justify-content:space-between;min-height:100vh;padding:52px;display:flex;position:relative;overflow:hidden}.auth-brand-panel:after{content:"";border:70px solid #ffffff0d;border-radius:50%;width:420px;height:420px;position:absolute;bottom:-170px;right:-180px}.auth-brand-logo{z-index:1;object-fit:contain;object-position:left top;filter:drop-shadow(0 18px 34px #0003);width:min(360px,78%);height:auto;position:relative}.auth-brand-copy{z-index:1;max-width:480px;position:relative}.auth-brand-copy .eyebrow{color:#b9bbe4}.auth-brand-copy h1{color:#fff;max-width:470px;margin-bottom:18px;font-size:clamp(2.8rem,4.5vw,4.8rem);line-height:.98}.auth-brand-copy>p:last-child{color:#d0d3ed;max-width:430px;font-size:1rem}.auth-release-pill{z-index:1;color:#e7e8fb;background:#ffffff12;border:1px solid #ffffff1f;border-radius:999px;width:-moz-fit-content;width:fit-content;padding:9px 12px;font-size:.72rem;font-weight:800;position:relative}.auth-form-panel{padding:42px}.auth-form-card{border-radius:30px;padding:32px}.auth-mobile-brand{display:none}.sign-out-button{width:-moz-fit-content;width:fit-content;min-width:140px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important}}.subject-title-line{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.subject-title-line h2{margin-bottom:0}.verified-source-badge{background:var(--success-soft);min-height:24px;color:var(--success);letter-spacing:.02em;white-space:nowrap;border-radius:999px;align-items:center;padding:4px 8px;font-size:.66rem;font-weight:850;display:inline-flex}.verified-unit-card{background:#f7f7ff;border:1px solid #dfe2fb;border-radius:16px;justify-content:space-between;align-items:center;gap:16px;margin-top:15px;padding:14px;display:flex}.verified-unit-card h3{margin-bottom:4px}.verified-unit-card p:not(.eyebrow){color:var(--muted);font-size:.77rem}.primary-compact-button{background:var(--brand);color:#fff;cursor:pointer;border:1px solid #4c4dd0;border-radius:13px;min-height:44px;padding:9px 14px;font-size:.8rem;font-weight:850;box-shadow:0 8px 18px #5b5ce229}.primary-compact-button:hover{background:var(--brand-dark)}.future-subject-card{background:#fbfcfe}.future-subject-card .subject-detail-head{margin-bottom:0}.source-status,.source-page-pill{color:#70798b;white-space:nowrap;background:#f0f2f6;border-radius:999px;padding:5px 8px;font-size:.69rem;font-weight:800}.math-text{min-width:0}.math-fragment{vertical-align:-.08em;max-width:100%;display:inline-block}.math-text .katex{font-size:1.08em}.back-link{width:-moz-fit-content;width:fit-content;min-height:42px;color:var(--brand-dark);cursor:pointer;background:0 0;border:0;border-radius:11px;margin:-4px 0 -5px -9px;padding:7px 9px;font-size:.8rem;font-weight:850}.back-link:hover{background:var(--brand-soft)}.exercise-page{gap:18px}.exercise-hero{background:linear-gradient(145deg,#fff 0%,#f7f7ff 100%);border:1px solid #dfe2ee;border-radius:25px;grid-template-columns:minmax(0,1fr) auto;gap:18px;padding:19px;display:grid;box-shadow:0 14px 36px #1720330e}.exercise-hero-copy{min-width:0}.exercise-hero-copy h1{margin-bottom:7px}.exercise-hero-copy>p:last-child{max-width:720px;color:var(--muted);font-size:.86rem}.exercise-score{color:#fff;background:#1f2442;border-radius:22px;align-content:center;place-items:center;width:76px;height:76px;display:grid;box-shadow:0 12px 26px #1f24422e}.exercise-score strong{font-size:1.16rem;line-height:1}.exercise-score span{color:#cfd1ef;margin-top:5px;font-size:.66rem;font-weight:750}.exercise-progress-wide{grid-column:1/-1}.exercise-progress-meta{color:#697388;justify-content:space-between;gap:10px;margin-top:8px;font-size:.72rem;font-weight:750;display:flex}.exercise-study-layout{gap:18px;display:grid}.exercise-learning-panel,.exercise-unlock-card{border:1px solid var(--line);background:var(--surface);border-radius:21px;box-shadow:0 8px 24px #1720330a}.exercise-learning-panel{padding:16px}.learning-panel-heading{justify-content:space-between;align-items:flex-start;gap:10px;margin-bottom:13px;display:flex}.learning-panel-heading h2{margin-bottom:0}.learning-note-stack{gap:9px;display:grid}.learning-note{background:#fbfcfe;border:1px solid #e7eaf1;border-radius:14px;overflow:hidden}.learning-note summary{cursor:pointer;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px;min-height:50px;padding:11px 12px;list-style:none;display:grid}.learning-note summary::-webkit-details-marker{display:none}.learning-note summary span{font-size:.82rem;font-weight:850;line-height:1.32}.learning-note summary small{color:#8a92a1;font-size:.66rem;font-weight:750}.learning-note[open] summary{background:#fff;border-bottom:1px solid #e8eaf1}.learning-note-body{gap:12px;padding:13px;display:grid}.derived-note{color:#82652c;background:#fff8e9;border-radius:10px;padding:8px 9px;font-size:.71rem;line-height:1.45}.note-list{color:#4f596c;gap:8px;margin:0;padding-left:18px;font-size:.79rem;line-height:1.52;display:grid}.formula-stack{gap:7px;display:grid}.formula-chip{color:#30336d;scrollbar-width:thin;background:#f5f5ff;border:1px solid #dfe2fb;border-radius:11px;padding:10px 11px;font-size:.8rem;line-height:1.5;overflow-x:auto}.formula-chip .math-text{min-width:max-content;display:inline-block}.example-ref-list{color:#737d8f;gap:4px;padding-top:2px;font-size:.7rem;line-height:1.4;display:grid}.example-ref-list strong{color:#4d5669;font-size:.72rem}.exercise-practice-column{gap:14px;min-width:0;display:grid}.exercise-practice-heading{justify-content:space-between;align-items:flex-end;gap:12px;padding-inline:2px;display:flex}.exercise-practice-heading h2{margin-bottom:0}.exercise-question-groups{gap:10px;display:grid}.exercise-question-group{background:var(--surface);border:1px solid #e1e5ed;border-radius:18px;overflow:hidden;box-shadow:0 6px 20px #17203309}.exercise-question-group>summary{cursor:pointer;grid-template-columns:38px minmax(0,1fr) auto;align-items:center;gap:11px;min-height:66px;padding:12px 13px;list-style:none;display:grid}.exercise-question-group>summary::-webkit-details-marker{display:none}.exercise-question-group[open]>summary{background:#fcfdff;border-bottom:1px solid #eceff4}.question-group-number{background:var(--brand-soft);width:36px;height:36px;color:var(--brand-dark);border-radius:11px;place-items:center;font-size:.73rem;font-weight:900;display:grid}.question-group-copy{gap:3px;min-width:0;display:grid}.question-group-copy strong{color:#2f384c;font-size:.86rem;line-height:1.35}.question-group-copy small{color:#8a92a1;font-size:.68rem}.group-state{color:#747e90;background:#f1f2f5;border-radius:999px;padding:5px 8px;font-size:.63rem;font-weight:850}.group-state.complete{background:var(--success-soft);color:var(--success)}.exercise-question-list{display:grid}.exercise-question{color:#2f384b;text-align:left;cursor:pointer;background:#fff;border:0;border-bottom:1px solid #edf0f4;grid-template-columns:34px minmax(0,1fr);align-items:flex-start;gap:12px;width:100%;min-height:68px;padding:14px;transition:background .15s;display:grid}.exercise-question:last-child{border-bottom:0}.exercise-question:hover{background:#fafbfe}.exercise-question.complete{background:#fbfffd}.exercise-check{color:#fff;background:#fff;border:1.7px solid #cbd1dc;border-radius:9px;place-items:center;width:30px;height:30px;margin-top:1px;display:grid}.exercise-check .app-icon{width:1rem;height:1rem}.exercise-question.complete .exercise-check{border-color:var(--success);background:var(--success)}.exercise-question-copy{gap:7px;min-width:0;display:grid;overflow:hidden}.exercise-question-math{color:#222b3d;scrollbar-width:thin;width:100%;padding-block:1px 2px;font-size:.96rem;line-height:1.7;display:block;overflow-x:auto}.exercise-question-math>span{white-space:normal}.exercise-question-math .math-fragment{white-space:nowrap}.exercise-question.complete .exercise-question-math{color:#36443f}.exercise-question-copy small{color:#6f7889;font-size:.7rem;font-weight:780}.exercise-unlock-card{margin-top:4px;padding:16px}.compact-heading{margin-bottom:10px}.unlock-step{border-bottom:1px solid #f0f2f6;grid-template-columns:36px minmax(0,1fr) auto;align-items:center;gap:11px;padding:13px 0;display:grid}.unlock-step:last-child{border-bottom:0;padding-bottom:2px}.unlock-step>span{color:#687286;background:#eef0f5;border-radius:10px;place-items:center;width:34px;height:34px;font-size:.73rem;font-weight:900;display:grid}.unlock-step strong{margin-bottom:2px;font-size:.8rem;display:block}.unlock-step p{color:var(--muted);font-size:.71rem;line-height:1.45}.unlock-step b{color:#7d8595;font-size:.67rem}.unlock-step b .app-icon{width:1rem;height:1rem}.unlock-step.complete>span{background:var(--success-soft);color:var(--success)}.unlock-step.active>span{background:var(--brand-soft);color:var(--brand-dark)}.unlock-step.active b{color:var(--brand-dark)}.unlock-step.locked{opacity:.72}.exercise-loading-card{border:1px solid var(--line);background:#fff;border-radius:20px;align-items:center;gap:12px;padding:18px;display:flex}.exercise-loading-card p{color:var(--muted);margin-top:3px;font-size:.76rem}.loading-dot{background:var(--brand);width:12px;height:12px;box-shadow:0 0 0 7px var(--brand-soft);border-radius:50%}.error-card h1{font-size:1.4rem}@media (max-width:430px){.exercise-hero{border-radius:21px;grid-template-columns:minmax(0,1fr) 68px;gap:12px;padding:16px}.exercise-hero-copy>p:last-child{font-size:.79rem}.exercise-score{border-radius:19px;width:66px;height:66px}.exercise-progress-meta{align-items:flex-start;font-size:.66rem}.exercise-question-group>summary{grid-template-columns:34px minmax(0,1fr) auto;gap:9px;padding:11px}.question-group-number{width:32px;height:32px}.group-state{padding:4px 6px}.exercise-question{grid-template-columns:32px minmax(0,1fr);gap:10px;padding:13px 11px}.exercise-question-math{font-size:.92rem}}@media (min-width:700px){.exercise-hero{padding:23px}.exercise-score{border-radius:25px;width:86px;height:86px}.exercise-score strong{font-size:1.32rem}.exercise-learning-panel,.exercise-unlock-card{padding:19px}.exercise-question{padding:15px 16px}}@media (min-width:900px){.exercise-page{width:min(100%,1440px);padding-top:28px}.exercise-hero{padding:26px 28px}.exercise-hero-copy>p:last-child{font-size:.9rem}.exercise-study-layout{grid-template-columns:minmax(320px,.55fr) minmax(0,1fr);align-items:start;gap:24px}.exercise-learning-panel{max-height:calc(100vh - 48px);position:sticky;top:24px;overflow:auto}.exercise-practice-heading{padding-inline:4px}.exercise-question-group>summary{min-height:72px;padding:14px 16px}.question-group-copy strong{font-size:.91rem}.exercise-question{min-height:74px;padding:16px 17px}.exercise-question-math{font-size:1.02rem}.exercise-question-copy small{font-size:.71rem}}@media (min-width:1280px){.exercise-page{padding-inline:38px}.exercise-study-layout{grid-template-columns:minmax(360px,.58fr) minmax(0,1fr);gap:28px}.exercise-learning-panel{padding:21px}.note-list{font-size:.81rem}.formula-chip{font-size:.84rem}.exercise-question-math{font-size:1.06rem}}.exercise-mobile-switcher{border:1px solid var(--line);background:#f2f4f8;border-radius:14px;grid-template-columns:1fr 1fr;gap:4px;padding:4px;display:grid}.exercise-mobile-switcher button{color:#687287;cursor:pointer;background:0 0;border:0;border-radius:10px;min-height:42px;font-weight:850}.exercise-mobile-switcher button.active{color:var(--brand-dark);background:#fff;box-shadow:0 3px 12px #17203312}.checkpoint-card{background:#fff;border:1px solid #dfe3ed;border-radius:21px;gap:16px;padding:17px;display:grid;box-shadow:0 8px 24px #1720330a}.locked-checkpoint{background:linear-gradient(135deg,#fbfcff,#f5f6fb);grid-template-columns:minmax(0,1fr) auto;align-items:center}.locked-checkpoint h2,.checkpoint-heading h2{margin:3px 0 5px}.locked-checkpoint p:last-child,.checkpoint-heading p:last-child{color:var(--muted);font-size:.78rem}.checkpoint-lock-pill{color:#667085;white-space:nowrap;background:#eef0f5;border-radius:999px;padding:8px 10px;font-size:.69rem;font-weight:850}.checkpoint-heading{grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:14px;display:grid}.checkpoint-best{color:#fff;background:#202542;border-radius:15px;place-items:center;min-width:74px;padding:11px 10px;display:grid}.checkpoint-best strong{font-size:1.08rem}.checkpoint-best span{color:#cfd3e6;margin-top:2px;font-size:.62rem;font-weight:750}.checkpoint-provenance{color:#697286;background:#f7f9fc;border-radius:12px;padding:10px 12px;font-size:.72rem;line-height:1.5}.checkpoint-questions{gap:13px;display:grid}.checkpoint-question{background:#fff;border:1px solid #e6e9f0;border-radius:16px;gap:11px;padding:14px;display:grid}.checkpoint-question-title{color:#2f384c;grid-template-columns:28px minmax(0,1fr);align-items:start;gap:10px;font-weight:800;line-height:1.55;display:grid}.checkpoint-question-title>span:first-child{background:var(--brand-soft);width:28px;height:28px;color:var(--brand-dark);border-radius:9px;place-items:center;font-size:.7rem;display:grid}.checkpoint-options{grid-template-columns:1fr 1fr;gap:8px;padding-left:38px;display:grid}.checkpoint-option{color:#344054;text-align:left;cursor:pointer;background:#fff;border:1px solid #dfe3eb;border-radius:12px;grid-template-columns:25px minmax(0,1fr);align-items:center;gap:8px;min-height:48px;padding:9px 10px;display:grid}.checkpoint-option:hover{background:#fafaff;border-color:#b8bce9}.checkpoint-option.submitted{cursor:default}.checkpoint-option.submitted:hover{background:#fff;border-color:#dfe3eb}.checkpoint-option-input{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.checkpoint-option:has(.checkpoint-option-input:focus-visible){outline-offset:2px;outline:3px solid #666bd433}.checkpoint-edit-hint{color:#6f788a;margin:-2px 0 1px;font-size:.72rem;font-weight:720}.checkpoint-option.selected{background:#f5f4ff;border-color:#8589d8}.checkpoint-option.correct{background:#f0fbf6;border-color:#83c9ad}.checkpoint-option.incorrect{background:#fff4f4;border-color:#e7a4a4}.checkpoint-option-key{color:#687287;background:#f0f2f7;border-radius:8px;place-items:center;width:24px;height:24px;font-size:.65rem;font-weight:900;display:grid}.checkpoint-explanation{color:#5f687a;background:#f7f8fb;border-radius:11px;gap:5px;margin-left:38px;padding:10px 11px;font-size:.75rem;line-height:1.55;display:grid}.checkpoint-explanation.correct{color:#356c59;background:#effaf5}.checkpoint-explanation.incorrect{color:#84504d;background:#fff5f4}.checkpoint-explanation small{color:#7a8394;font-size:.66rem;font-weight:780}.checkpoint-submit-row,.checkpoint-result{justify-content:space-between;align-items:center;gap:12px;padding-top:3px;display:flex}.checkpoint-submit-row>span,.checkpoint-attempts{color:#747d8f;font-size:.72rem;font-weight:750}.checkpoint-submit:disabled{opacity:.45;cursor:not-allowed}.checkpoint-result{background:#fff6f3;border-radius:14px;padding:13px}.checkpoint-result.passed{background:#eefaf5}.checkpoint-result h3{margin:3px 0}.checkpoint-result p:last-child{color:#697286;font-size:.75rem}.checkpoint-attempts{text-align:right;margin:-4px 0 0}@media (max-width:767px){.exercise-study-layout.mobile-practice .exercise-learning-panel,.exercise-study-layout.mobile-notes .exercise-practice-column{display:none}.exercise-practice-heading{padding-top:2px}.checkpoint-options{grid-template-columns:1fr;padding-left:0}.checkpoint-explanation{margin-left:0}.checkpoint-question{padding:12px}.locked-checkpoint{grid-template-columns:1fr}.checkpoint-lock-pill{justify-self:start}.checkpoint-submit-row,.checkpoint-result{flex-direction:column;align-items:stretch}.checkpoint-submit-row .primary-button,.checkpoint-result .secondary-button{width:100%;min-height:44px}.back-link{align-items:center;min-height:42px;padding:0 8px;display:inline-flex}}@media (min-width:768px){.exercise-mobile-switcher{display:none}}.exercise-question.locked{cursor:default}.exercise-question.locked:hover{background:inherit}.exercise-completion-card{background:#fff;border:1px solid #dfe4ee;border-radius:21px;gap:14px;padding:18px;display:grid;box-shadow:0 8px 24px #1720330a}.exercise-completion-card.pending,.exercise-completion-card.ready{grid-template-columns:minmax(0,1fr) auto;align-items:center}.exercise-completion-card.pending{background:linear-gradient(135deg,#fbfcff,#f7f8fc)}.exercise-completion-card.ready{background:linear-gradient(135deg,#f8fffc,#f2fbf7);border-color:#bcded1}.exercise-completion-card.committed{background:#f4fcf8;border-color:#b8decf;grid-template-columns:44px minmax(0,1fr)}.exercise-completion-card h2{margin:3px 0 5px}.exercise-completion-card p:last-child{color:#697286;font-size:.78rem;line-height:1.55}.completion-count-pill{color:#667085;white-space:nowrap;background:#eef1f6;border-radius:999px;padding:8px 11px;font-size:.7rem;font-weight:850}.completion-state-icon{color:#087a58;background:#dff5eb;border-radius:14px;place-items:center;width:44px;height:44px;display:grid}.completion-state-icon svg,.completion-ack-box svg,.checkpoint-selected-mark svg{fill:none;stroke:currentColor;stroke-width:2.6px;stroke-linecap:round;stroke-linejoin:round;width:20px;height:20px}.completion-report{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:12px;display:grid}.completion-report span{color:#6b7485;background:#fffc;border:1px solid #dfe8e4;border-radius:12px;gap:2px;padding:10px;font-size:.68rem;display:grid}.completion-report span strong{color:#253044;font-size:.78rem}.completion-report.detailed{margin-top:0}.completion-ack{color:#4f596d;cursor:pointer;background:#fafbfc;border:1px solid #dfe3eb;border-radius:13px;grid-template-columns:28px minmax(0,1fr);align-items:start;gap:10px;padding:12px;font-size:.78rem;line-height:1.5;display:grid}.completion-ack.checked{background:#f2fbf7;border-color:#9ed1bd}.completion-ack input{opacity:0;pointer-events:none;position:absolute}.completion-ack-box{color:#fff;background:#fff;border:2px solid #c8ced9;border-radius:9px;place-items:center;width:26px;height:26px;display:grid}.completion-ack.checked .completion-ack-box{background:#07956a;border-color:#07956a}.completion-actions{justify-content:flex-end;gap:9px;display:flex}.completion-actions .primary-button:disabled{opacity:.45;cursor:not-allowed}.checkpoint-ready-card{background:linear-gradient(135deg,#fbfbff,#f5f4ff);border-color:#cfd2f1;grid-template-columns:minmax(0,1fr) auto;align-items:center}.checkpoint-ready-copy h2{margin:3px 0 5px}.checkpoint-ready-copy p{color:#687287;font-size:.78rem}.checkpoint-ready-copy small{color:#7b8496;margin-top:7px;font-size:.68rem;font-weight:750;display:block}.checkpoint-start-button{min-width:150px}.checkpoint-option{grid-template-columns:25px minmax(0,1fr) 30px;position:relative}.checkpoint-option.selected:not(.correct):not(.incorrect){background:#eeedff;border:2px solid #666bd4;padding:8px 9px;box-shadow:0 0 0 3px #666bd41a}.checkpoint-option.selected:not(.correct):not(.incorrect) .checkpoint-option-key{color:#fff;background:#666bd4}.checkpoint-selected-mark{color:#0000;background:0 0;border-radius:999px;justify-self:end;place-items:center;width:27px;height:27px;display:grid}.checkpoint-option.selected:not(.correct):not(.incorrect) .checkpoint-selected-mark{color:#fff;background:#666bd4}.chapter-readiness-note{background:#fafbfd;border:1px dashed #ccd3df;border-radius:18px;padding:17px}.chapter-readiness-note h2{margin:3px 0 5px;font-size:1rem}.chapter-readiness-note p:last-child{color:#6e7789;font-size:.76rem;line-height:1.55}@media (max-width:767px){.exercise-completion-card.pending,.exercise-completion-card.ready,.checkpoint-ready-card{grid-template-columns:1fr}.exercise-completion-card.ready .primary-button,.checkpoint-start-button{width:100%;min-height:44px}.completion-report{grid-template-columns:1fr}.completion-actions{grid-template-columns:1fr;display:grid}.completion-actions .primary-button,.completion-actions .secondary-button{width:100%;min-height:44px}}.planner-dashboard{gap:18px}.planner-hero{align-items:center}.planner-mode-pill{background:#fff;border:1px solid #dfe3ec;border-radius:16px;grid-template-columns:22px minmax(0,1fr);align-items:center;column-gap:8px;min-width:185px;padding:11px 13px;display:grid;box-shadow:0 7px 20px #1720330b}.planner-mode-pill .app-icon{color:#575bcf;grid-row:1/3;width:20px;height:20px}.planner-mode-pill strong{color:#30384c;font-size:.76rem}.planner-mode-pill span{color:#798295;font-size:.64rem}.planner-coverage-note{background:#f4fbf8;border:1px solid #cfe5dc;border-radius:15px;justify-content:space-between;align-items:center;gap:14px;padding:12px 14px;display:flex}.planner-coverage-note strong{color:#285e4c;font-size:.78rem}.planner-coverage-note p{color:#6d7b76;margin-top:3px;font-size:.71rem}.planner-today-card,.planner-week-section,.planner-subject-section,.planner-settings-card{background:#fff;border:1px solid #e1e5ed;border-radius:22px;padding:18px;box-shadow:0 8px 24px #1720330a}.planner-today-top{justify-content:space-between;align-items:flex-start;gap:15px;margin-bottom:14px;display:flex}.planner-today-top h2{margin-bottom:5px;font-size:1.28rem}.planner-today-top p:last-child{color:#6d7688;font-size:.78rem}.planner-time-badge{color:#3b4357;white-space:nowrap;background:#f5f6fa;border-color:#dfe3ec}.planner-today-list{gap:9px;display:grid}.planner-task-card{background:#fbfcfe;border:1px solid #e4e7ee;border-radius:15px;grid-template-columns:34px minmax(0,1fr) auto;align-items:center;gap:11px;padding:13px;display:grid}.planner-task-number{color:#4d50bd;background:#ececff;border-radius:10px;place-items:center;width:32px;height:32px;font-size:.72rem;font-weight:900;display:grid}.planner-task-kind{color:#737c8e;letter-spacing:.04em;text-transform:uppercase;margin-bottom:3px;font-size:.63rem;font-weight:850;display:inline-block}.planner-task-kind.completion{color:#277159}.planner-task-kind.checkpoint{color:#5b55b9}.planner-task-kind.revision{color:#8b6423}.planner-task-card h3{margin:0 0 3px;font-size:.9rem}.planner-task-card p{color:#788194;font-size:.7rem}.planner-open-task{min-width:74px}.planner-week-strip{grid-template-columns:repeat(7,minmax(0,1fr));gap:7px;display:grid}.planner-day{text-align:center;background:#fbfcfd;border:1px solid #e5e8ef;border-radius:13px;gap:2px;min-width:0;padding:10px 7px;display:grid}.planner-day>span{color:#788194;text-transform:uppercase;font-size:.62rem;font-weight:850}.planner-day strong{color:#343c4f;font-size:.95rem}.planner-day small{color:#80899a;white-space:nowrap;text-overflow:ellipsis;font-size:.58rem;overflow:hidden}.planner-day b{color:#5559c4;margin-top:3px;font-size:.59rem}.planner-day.today{background:#f2f1ff;border-color:#8084dd;box-shadow:0 0 0 2px #5b5ce214}.planner-day.rest{background:#fffaf0;border-style:dashed}.planner-day.past{opacity:.58}.planner-week-summary{grid-template-columns:repeat(3,1fr);gap:8px;margin:14px 0 11px;display:grid}.planner-week-summary>div{background:#f7f8fb;border-radius:12px;gap:2px;padding:10px 11px;display:grid}.planner-week-summary span{color:#788194;font-size:.63rem}.planner-week-summary strong{color:#30394b;font-size:.82rem}.planner-capacity-note{color:#7a8395;margin-top:7px;font-size:.66rem;line-height:1.5}.planner-subject-balance{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;display:grid}.planner-subject-balance article{border:1px solid #e5e8ef;border-radius:13px;padding:11px}.planner-subject-balance article>div{justify-content:space-between;gap:12px;margin-bottom:8px;display:flex}.planner-subject-balance strong{font-size:.78rem}.planner-subject-balance span{color:#717a8c;font-size:.7rem;font-weight:750}.planner-empty-state{background:#f7f8fb;border-radius:13px;padding:13px}.planner-empty-state strong{font-size:.8rem}.planner-empty-state p{color:#778093;margin-top:4px;font-size:.72rem}.planner-settings-card{padding:0;overflow:hidden}.planner-settings-card summary{cursor:pointer;justify-content:space-between;align-items:center;gap:14px;padding:15px 17px;list-style:none;display:flex}.planner-settings-card summary::-webkit-details-marker{display:none}.planner-settings-card summary strong{color:#384154;font-size:.77rem}.planner-summary-chevron{border-bottom:2px solid #737c8e;border-right:2px solid #737c8e;width:9px;height:9px;transition:transform .18s;transform:rotate(45deg)}.planner-settings-card[open] .planner-summary-chevron{transform:rotate(225deg)}.planner-settings-card[open] summary{border-bottom:1px solid #e7eaf0}.planner-settings-grid{grid-template-columns:1fr 1fr;gap:12px;padding:15px 17px 10px;display:grid}.planner-settings-grid label{gap:6px;display:grid}.planner-settings-grid label>span,.planner-rest-settings>span{color:#4b5568;font-size:.72rem;font-weight:850}.planner-settings-grid input{color:#30394c;background:#fff;border:1px solid #dce1ea;border-radius:11px;width:100%;min-height:42px;padding:8px 10px}.planner-settings-grid small,.planner-rest-settings small{color:#838c9d;font-size:.64rem;line-height:1.45}.planner-rest-settings{gap:7px;padding:5px 17px 12px;display:grid}.planner-rest-settings>div{flex-wrap:wrap;gap:6px;display:flex}.planner-rest-settings button{color:#697286;cursor:pointer;background:#fff;border:1px solid #dde2eb;border-radius:10px;min-width:45px;min-height:36px;font-size:.68rem;font-weight:800}.planner-rest-settings button.active{color:#4246ad;background:#eeefff;border-color:#7b80d8}.planner-reset-settings{margin:0 11px 11px}.planner-rest-card{border:1px solid #eadfbf}@media (min-width:1080px){.planner-dashboard{width:min(100%,1180px);margin:0 auto}}@media (max-width:767px){.planner-hero{align-items:stretch}.planner-mode-pill{min-width:0}.planner-coverage-note{align-items:flex-start}.planner-today-top{align-items:stretch}.planner-week-strip{grid-template-columns:repeat(4,minmax(0,1fr));padding-bottom:0;overflow:visible}.planner-day{min-width:0}.planner-task-card{grid-template-columns:32px minmax(0,1fr)}.planner-open-task{grid-column:1/-1;width:100%;min-height:42px}.planner-week-summary,.planner-subject-balance,.planner-settings-grid{grid-template-columns:1fr}.planner-today-top{flex-direction:column}.planner-time-badge{align-self:flex-start}}.subjects-page,.subjects-page>*,.subjects-page .stack-lg,.subjects-page .subject-detail-card,.subjects-page .subject-detail-head,.subjects-page .verified-unit-card,.subjects-page .chapter-list,.subjects-page .chapter-row{min-width:0;max-width:100%}.subjects-page .simple-header,.subjects-page .simple-header>*{overflow-wrap:anywhere;min-width:0;max-width:100%}.subjects-page .subject-detail-head .grow,.subjects-page .verified-unit-card>div,.subjects-page .chapter-row>span{min-width:0}.subjects-page .chapter-row>span{overflow-wrap:anywhere}.subjects-page .subject-detail-head>strong{flex:none}@media (max-width:519px){.subjects-page{padding-inline:16px}.subjects-page .subject-detail-card{width:100%;padding:14px}.subjects-page .subject-detail-head{grid-template-columns:44px minmax(0,1fr) auto;align-items:start;gap:10px;display:grid}.subjects-page .subject-title-line{align-items:flex-start}.subjects-page .verified-source-badge{white-space:normal;text-align:center;max-width:100%}.subjects-page .verified-unit-card{grid-template-columns:minmax(0,1fr);align-items:stretch;gap:12px;display:grid}.subjects-page .primary-compact-button{width:100%}.subjects-page .chapter-row{grid-template-columns:minmax(0,1fr);gap:4px;display:grid}.subjects-page .chapter-row span:last-child{text-align:left}.subjects-page .future-subject-card .subject-detail-head{grid-template-columns:44px minmax(0,1fr)}.subjects-page .future-subject-card .source-status{white-space:normal;grid-column:2;justify-self:start;max-width:100%}}.exercise-completion-card.completion-v2.ready{grid-template-columns:minmax(0,1fr) auto;align-items:center}.completion-report.compact{margin-top:10px}.finish-exercise-button{min-width:148px}@media (max-width:767px){.exercise-completion-card.completion-v2{padding:15px}.exercise-completion-card.completion-v2.ready,.exercise-completion-card.completion-v2.pending{grid-template-columns:minmax(0,1fr)}.exercise-completion-card.completion-v2.committed{grid-template-columns:38px minmax(0,1fr);gap:11px}.exercise-completion-card.completion-v2 .completion-state-icon{border-radius:12px;width:38px;height:38px}.exercise-completion-card.completion-v2 .completion-report.compact{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}.exercise-completion-card.completion-v2 .completion-report.compact span{padding:8px}.finish-exercise-button{width:100%;min-width:0;min-height:46px}}@media (max-width:390px){.exercise-completion-card.completion-v2 .completion-report.compact{grid-template-columns:1fr}}.page>*,.exercise-study-layout>*,.exercise-practice-column>*,.checkpoint-card,.exercise-completion-card{min-width:0;max-width:100%}.subject-detail-card{overflow:hidden}.subject-detail-head-v2{grid-template-columns:44px minmax(0,1fr) auto;align-items:center;gap:12px;display:grid}.subject-detail-head-v2 .verified-source-badge{justify-self:end}.subject-coverage-note{background:#fafbfd;border:1px solid #e4e8ef;border-radius:13px;gap:3px;margin-top:-2px;padding:10px 12px;display:grid}.subject-coverage-note strong{color:#3e485a;font-size:.72rem}.subject-coverage-note span{color:#7a8394;overflow-wrap:anywhere;font-size:.68rem;line-height:1.45}.verified-unit-card-v2{align-items:stretch}.verified-unit-copy{gap:9px;min-width:0;display:grid}.verified-unit-heading{justify-content:space-between;align-items:flex-start;gap:10px;display:flex}.verified-unit-heading>div{min-width:0}.exercise-state-pill{color:#6e7788;white-space:nowrap;background:#eef0f5;border-radius:999px;flex:none;padding:5px 8px;font-size:.64rem;font-weight:850}.exercise-state-pill.ready{color:#8c641f;background:#fff4dd}.exercise-state-pill.complete{background:var(--success-soft);color:var(--success)}@media (max-width:767px){.planner-hero{flex-direction:column;align-items:stretch}.planner-mode-pill{width:100%;min-width:0}.planner-coverage-note{flex-direction:column;align-items:stretch}.planner-coverage-note .text-button{align-self:flex-start}.planner-week-strip{grid-template-columns:repeat(4,minmax(0,1fr));padding-bottom:0;overflow:visible}.planner-day{min-width:0}.planner-day strong{font-size:.82rem}.planner-week-section,.planner-today-card,.planner-subject-section,.planner-settings-card{border-radius:18px;padding:14px}.checkpoint-ready-card{gap:13px}}@media (max-width:519px){.subjects-page{padding-inline:14px}.subjects-page .simple-header{width:100%;min-width:0}.subjects-page .simple-header .eyebrow,.subjects-page .simple-header .muted{white-space:normal;overflow-wrap:anywhere;word-break:normal}.subjects-page .subject-detail-card{width:100%;min-width:0;max-width:100%;padding:14px}.subjects-page .subject-detail-head-v2{grid-template-columns:44px minmax(0,1fr);align-items:start;gap:10px}.subjects-page .subject-detail-head-v2 .verified-source-badge{white-space:normal;text-align:left;grid-column:2;justify-self:start;max-width:100%}.subjects-page .verified-unit-card-v2{grid-template-columns:minmax(0,1fr);gap:12px;width:100%;min-width:0;display:grid}.subjects-page .verified-unit-heading{align-items:flex-start}.subjects-page .primary-compact-button,.subjects-page .chapter-row,.subjects-page .future-subject-card .subject-detail-head{width:100%;min-width:0}.subjects-page .chapter-row span,.subjects-page .future-subject-card p,.subjects-page .source-status{overflow-wrap:anywhere;min-width:0;max-width:100%}.exercise-completion-card.completion-v2 .completion-report.compact{grid-template-columns:1fr}}@media (max-width:390px){.planner-week-strip{grid-template-columns:repeat(3,minmax(0,1fr))}.exercise-hero{grid-template-columns:minmax(0,1fr) 62px;padding:14px}.exercise-score{border-radius:17px;width:60px;height:60px}}.review-exercise-page .textbook-mcq-section,.review-exercise-page .written-review-section{gap:13px;display:grid}.review-section-heading{justify-content:space-between;align-items:center;gap:12px;display:flex}.review-section-heading h2{margin:2px 0 0}.review-source-note{color:#667085;background:#f6f8fb;border-radius:12px;margin:0;padding:10px 12px;font-size:.72rem;line-height:1.5}.textbook-review-mcq.correct-review-mcq{border-color:#b8decf}.review-exercise-page .checkpoint-option:not(:disabled){cursor:pointer}.review-exercise-page .checkpoint-option.incorrect{background:#fff4f4;border-color:#e7a4a4}@media (max-width:767px){.review-section-heading{flex-direction:column;align-items:flex-start}.review-section-heading .verified-source-badge{align-self:flex-start}}.math-chapter-page{gap:16px}.chapter-hero{grid-template-columns:minmax(0,1fr) auto}.chapter-example-progress,.chapter-finish-card,.chapter-exam-pack-lock{background:#fff;border:1px solid #dfe4ee;border-radius:20px;gap:12px;padding:17px;display:grid;box-shadow:0 8px 24px #1720330a}.chapter-example-progress{grid-template-columns:minmax(0,1fr)}.chapter-example-progress h2,.chapter-finish-card h2,.chapter-exam-pack-lock h2{margin:3px 0 5px}.chapter-example-progress p:last-child,.chapter-finish-card p:last-child,.chapter-exam-pack-lock p{color:#687287;font-size:.76rem;line-height:1.55}.chapter-example-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.chapter-example-card{background:#fff;border:1px solid #e2e6ee;border-radius:17px;gap:12px;min-width:0;padding:15px;display:grid}.chapter-example-card.reviewed{background:#f5fcf8;border-color:#a9d8c5}.chapter-example-head{grid-template-columns:30px minmax(0,1fr) auto;align-items:start;gap:9px;display:grid}.chapter-example-number{background:var(--brand-soft);width:30px;height:30px;color:var(--brand-dark);border-radius:9px;place-items:center;font-size:.72rem;font-weight:900;display:grid}.chapter-example-head h3{margin:2px 0 0;font-size:.92rem}.chapter-example-source{color:#374151;background:#f7f8fb;border-radius:12px;gap:7px;min-width:0;padding:11px;line-height:1.55;display:grid}.chapter-example-source>strong{color:#5f687a;text-transform:uppercase;letter-spacing:.08em;font-size:.66rem}.compact-formulas{gap:5px}.compact-formulas .formula-chip{padding:6px 8px}.chapter-example-skill{color:#566074;margin:0;font-size:.75rem;line-height:1.5}.chapter-example-provenance{color:#7a8394;font-size:.66rem;line-height:1.45}.example-review-button{justify-content:center;width:100%;min-height:42px}.example-review-button.reviewed{align-items:center;gap:6px;display:inline-flex}.example-review-button.reviewed svg{width:16px;height:16px}.chapter-finish-card{grid-template-columns:minmax(0,1fr) auto;align-items:center}.chapter-finish-card.ready{background:#f4fcf8;border-color:#9ed4bf}.chapter-readiness-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:10px 0;display:grid}.chapter-readiness-grid span{color:#6a7385;background:#f6f8fb;border-radius:11px;gap:2px;padding:10px;font-size:.68rem;display:grid}.chapter-readiness-grid strong{color:#243047;font-size:.82rem}.chapter-exam-pack-lock{background:#fafbfe;padding-right:190px;position:relative}.chapter-exam-pack-lock .checkpoint-lock-pill{position:absolute;top:17px;right:17px}@media (max-width:767px){.chapter-hero,.chapter-finish-card,.chapter-example-grid,.chapter-readiness-grid{grid-template-columns:1fr}.chapter-finish-card .primary-button{width:100%;min-height:46px}.chapter-exam-pack-lock{padding-right:17px}.chapter-exam-pack-lock .checkpoint-lock-pill{justify-self:start;position:static}}@media (max-width:390px){.chapter-example-head{grid-template-columns:30px minmax(0,1fr)}.chapter-example-head .exercise-state-pill{grid-column:2;justify-self:start}}.checkpoint-ready-actions,.checkpoint-result-actions{flex-wrap:wrap;justify-content:flex-end;gap:10px;display:flex}.study-next-button{width:-moz-fit-content;width:fit-content;margin-top:12px}.chapter-reference-examples{border:1px solid var(--line);background:#fff;border-radius:18px;overflow:hidden}.chapter-reference-examples>summary{cursor:pointer;justify-content:space-between;align-items:center;gap:12px;padding:15px 17px;list-style:none;display:flex}.chapter-reference-examples>summary::-webkit-details-marker{display:none}.chapter-reference-examples>summary span{gap:3px;display:grid}.chapter-reference-examples>summary small{color:var(--muted);font-size:.7rem;font-weight:650}.chapter-reference-grid{gap:10px;padding:0 16px 16px;display:grid}.chapter-reference-card{background:#fafbfc;border:1px solid #e5e8ef;border-radius:14px;gap:8px;padding:13px;display:grid}.chapter-reference-card h3{font-size:.9rem}.chapter-reference-card small{color:var(--muted);line-height:1.45}@media (max-width:767px){.checkpoint-ready-actions,.checkpoint-result-actions{justify-content:stretch;width:100%}.checkpoint-ready-actions>button,.checkpoint-result-actions>button,.study-next-button{width:100%}}.exam-pack-hero,.exam-pack-warning,.exam-pack-section,.exam-reference-card,.exam-evidence-register,.exam-pack-finish-card{border:1px solid var(--line);background:#fff;border-radius:18px}.exam-pack-hero{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:18px;padding:20px;display:grid}.exam-pack-hero h1{margin:3px 0 6px}.exam-pack-hero p{max-width:720px}.exam-pack-hero-actions{justify-items:end;gap:9px;display:grid}.exam-evidence-badge,.exam-priority-pill,.exam-match-pill{border-radius:999px;align-items:center;width:-moz-fit-content;width:fit-content;font-size:.68rem;font-weight:850;display:inline-flex}.exam-evidence-badge{color:#0e6d4c;background:#edf6f2;padding:6px 9px}.exam-pdf-button{justify-content:center;text-decoration:none}.exam-pack-warning{background:#fffaf0;border-color:#ead9ad;padding:14px 16px}.exam-pack-warning strong{color:#694d0b}.exam-pack-warning p{color:#6f6656;margin:4px 0 0}.exam-pack-section{gap:14px;padding:18px;display:grid}.exam-section-heading{justify-content:space-between;align-items:end;gap:12px;display:flex}.exam-section-heading h2{margin:2px 0 0}.exam-section-heading>span{color:var(--muted);font-size:.72rem;font-weight:800}.exam-priority-grid{gap:12px;display:grid}.exam-priority-card{background:#fcfdff;border:1px solid #dfe4ec;border-radius:16px;gap:11px;min-width:0;padding:15px;display:grid}.exam-priority-card.must-know{background:#fbfbff;border-color:#b9c7ff}.exam-priority-head{grid-template-columns:34px minmax(0,1fr);align-items:start;gap:10px;display:grid}.exam-rank{background:var(--brand-soft);width:34px;height:34px;color:var(--brand-dark);border-radius:10px;place-items:center;font-weight:900;display:grid}.exam-priority-labels{flex-wrap:wrap;gap:6px;margin-bottom:4px;display:flex}.exam-priority-pill{color:#3949b8;background:#eef2ff;padding:4px 7px}.exam-priority-pill.high-yield{color:#176847;background:#eef8f3}.exam-match-pill{color:#657083;background:#f1f3f6;padding:4px 7px}.exam-priority-head h3{margin:0;font-size:.98rem}.exam-task-prompt{color:#4f5b70;margin:0;font-size:.8rem;font-weight:700}.exam-source-question{background:#f6f8fb;border-radius:12px;min-width:0;padding:11px 12px;line-height:1.55}.exam-option-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;display:grid}.exam-option-grid>div{border:1px solid #e0e5ed;border-radius:10px;grid-template-columns:24px minmax(0,1fr);align-items:center;gap:7px;padding:8px;display:grid}.exam-option-grid strong{background:#edf1f7;border-radius:7px;place-items:center;width:22px;height:22px;font-size:.66rem;display:grid}.exam-evidence-stack{gap:7px;display:grid}.exam-evidence-row{border-top:1px dashed #dce1e9;gap:4px;padding-top:9px;display:grid}.exam-evidence-row>div{flex-wrap:wrap;align-items:center;gap:7px;display:flex}.exam-evidence-row span{color:var(--muted);font-size:.67rem}.exam-evidence-row p{color:#667085;margin:0;font-size:.72rem;line-height:1.5}.exam-source-link{color:#3547b8;text-decoration:none}.exam-source-link:hover{text-decoration:underline}.exam-pack-reference-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.exam-reference-card{gap:9px;padding:17px;display:grid}.exam-reference-card h2{margin:0}.exam-reference-card ul{color:#566074;margin:0;padding-left:19px;font-size:.78rem;line-height:1.55}.exam-reference-card small{color:var(--muted)}.exam-evidence-register{overflow:hidden}.exam-evidence-register>summary{cursor:pointer;padding:15px 17px;list-style:none}.exam-evidence-register>summary::-webkit-details-marker{display:none}.exam-evidence-register>summary span{gap:3px;display:grid}.exam-evidence-register>summary small{color:var(--muted);font-size:.7rem}.exam-evidence-source-list{gap:8px;padding:0 17px 17px;display:grid}.exam-evidence-source-list>div{background:#f7f9fb;border-radius:11px;gap:2px;padding:9px 11px;display:grid}.exam-evidence-source-list span{color:var(--muted);font-size:.7rem}.exam-pack-finish-card{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:16px;padding:18px;display:grid}.chapter-exam-pack-lock.published{background:#f5fcf8;border-color:#a8d8c5}@media (max-width:767px){.exam-pack-hero,.exam-pack-reference-grid,.exam-pack-finish-card{grid-template-columns:1fr}.exam-pack-hero-actions{justify-items:stretch;width:100%}.exam-pdf-button,.compact-exam-page-actions .secondary-button{width:100%}.exam-option-grid{grid-template-columns:1fr}}.compact-exam-pack-page{max-width:980px;margin-inline:auto}.compact-exam-hero{align-items:end}.guess-paper-summary-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;display:grid}.guess-paper-summary-grid article{border:1px solid var(--border);background:var(--surface);border-radius:18px;gap:4px;min-width:0;padding:16px;display:grid}.guess-paper-summary-grid strong{font-size:clamp(1.45rem,4vw,2rem);line-height:1}.guess-paper-summary-grid span{color:var(--muted);font-size:.84rem;line-height:1.35}.compact-selection-copy{gap:10px;padding-top:12px;display:grid}.compact-selection-copy p{margin:0}@media (max-width:640px){.compact-exam-hero{align-items:stretch}.compact-exam-hero .exam-pdf-button{text-align:center;justify-content:center;width:100%}.guess-paper-summary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.compact-exam-brand-copy{grid-template-columns:78px minmax(0,1fr);align-items:center;gap:14px;display:grid}.compact-exam-brand-logo{object-fit:contain;width:78px;height:78px}@media (max-width:620px){.compact-exam-brand-copy{grid-template-columns:58px minmax(0,1fr);gap:10px}.compact-exam-brand-logo{width:58px;height:58px}}.academic-source-context{background:#fbfcfe;border:1px solid #dfe5ee;border-radius:14px;gap:8px;min-width:0;padding:12px 13px;display:grid}.academic-source-context.compact{border-radius:12px;padding:10px 11px}.academic-source-heading{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.academic-source-heading strong{color:#263753;font-size:.76rem}.academic-source-heading span{color:#7b5600;background:#fff1d4;border-radius:999px;padding:3px 7px;font-size:.64rem;font-weight:800}.academic-source-exact{color:#1f2c43;gap:5px;min-width:0;line-height:1.5;display:grid}.academic-source-reference,.academic-source-anomaly{color:var(--muted);line-height:1.45;display:block}.academic-source-anomaly{color:#7b5600}.academic-learning-reference{color:#59657a;background:#f7f9ff;border-left:3px solid #b8c6e8;margin:0;padding:9px 10px;font-size:.72rem;line-height:1.45}.checkpoint-source-stack{gap:8px;margin-bottom:12px;display:grid}.checkpoint-source-intro{color:#667085;margin:0;font-size:.72rem;font-weight:700}.checkpoint-derived-copy{gap:3px;min-width:0;display:grid}.checkpoint-derived-copy small{color:#6d7890;text-transform:uppercase;letter-spacing:.03em;font-size:.66rem;font-weight:800}.exam-source-target-section{border:1px solid var(--border);background:var(--surface);border-radius:18px;overflow:hidden}.exam-source-target-section>summary{cursor:pointer;padding:15px 17px;list-style:none}.exam-source-target-section>summary::-webkit-details-marker{display:none}.exam-source-target-section>summary span{gap:3px;display:grid}.exam-source-target-section>summary small{color:var(--muted);font-size:.72rem}.exam-source-target-list{gap:12px;padding:0 16px 16px;display:grid}.exam-target-source-card{background:#fcfdff;border:1px solid #e2e7ef;border-radius:15px;gap:10px;min-width:0;padding:14px;display:grid}.exam-target-meta{color:var(--muted);flex-wrap:wrap;align-items:center;gap:8px;font-size:.7rem;display:flex}.exam-target-rationale{color:#5a667b;margin:0;font-size:.76rem;line-height:1.5}.exercise-question .academic-source-context{text-align:left;width:100%}@media (max-width:640px){.academic-source-context{padding:10px}.academic-source-reference{overflow-wrap:anywhere}}.onboarding-shell{background:radial-gradient(circle at 14% 10%,#6f82ff2e,#0000 28%),radial-gradient(circle at 86% 0,#43c9ac24,#0000 25%),#f5f7fb;place-items:center;min-height:100dvh;padding:clamp(18px,4vw,40px) 16px;display:grid}.onboarding-card{-webkit-backdrop-filter:blur(22px);background:#ffffffdb;border:1px solid #ffffffb8;border-radius:28px;gap:16px;width:min(760px,100%);padding:clamp(18px,4vw,30px);display:grid;box-shadow:0 24px 70px #232f4c1f}.onboarding-brand{align-items:flex-start;gap:14px;display:flex}.onboarding-brand h1{margin:3px 0 7px;font-size:clamp(1.55rem,5vw,2.2rem);line-height:1.08}.onboarding-brand p{color:var(--muted);margin:0}.onboarding-logo{color:#fff;background:#16213c;border-radius:15px;flex:0 0 46px;place-items:center;width:46px;height:46px;font-weight:900;display:grid;box-shadow:0 10px 26px #16213c33}.onboarding-section{background:#f9fbffeb;border:1px solid #e3e8f1;border-radius:20px;gap:12px;padding:16px;display:grid}.onboarding-section-heading{align-items:flex-start;gap:10px;display:flex}.onboarding-section-heading>span{color:#fff;background:#18284a;border-radius:50%;flex:0 0 26px;place-items:center;width:26px;height:26px;font-size:.78rem;font-weight:900;display:grid}.onboarding-section-heading p,.onboarding-section-heading strong{margin:0}.onboarding-section-heading p{color:var(--muted);margin-top:2px;font-size:.82rem}.onboarding-choice-grid{gap:8px;display:grid}.onboarding-choice-grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}.onboarding-choice-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.onboarding-choice-grid button,.onboarding-rest-days button{color:#43506a;min-height:44px;font:inherit;cursor:pointer;background:#fff;border:1px solid #d8dfeb;border-radius:13px;font-size:.8rem;font-weight:800;transition:transform .14s,border-color .14s,background .14s}.onboarding-choice-grid button:active,.onboarding-rest-days button:active{transform:scale(.98)}.onboarding-choice-grid button.active,.onboarding-rest-days button.active{color:#253a9a;background:#eef1ff;border-color:#6879df}.onboarding-inline-field{color:#3b4760;grid-template-columns:minmax(0,1fr) 120px;align-items:center;gap:8px 12px;font-size:.8rem;font-weight:800;display:grid}.onboarding-inline-field.wide{grid-template-columns:minmax(0,1fr) minmax(150px,220px)}.onboarding-inline-field small{color:var(--muted);grid-column:1/-1;font-weight:500;line-height:1.45}.onboarding-inline-field input,.onboarding-chapter-list select{color:#25324b;width:100%;min-height:44px;font:inherit;background:#fff;border:1px solid #d8dfeb;border-radius:12px;padding:0 11px}.onboarding-rest-days{gap:8px;display:grid}.onboarding-rest-days>strong{color:#3b4760;font-size:.8rem}.onboarding-rest-days>div{grid-template-columns:repeat(7,minmax(0,1fr));gap:6px;display:grid}.onboarding-chapter-list{gap:8px;display:grid}.onboarding-chapter-list label{border-bottom:1px solid #e7ebf2;grid-template-columns:minmax(0,1fr) minmax(140px,190px);align-items:center;gap:12px;padding:10px 0;display:grid}.onboarding-chapter-list label:last-child{border-bottom:0}.onboarding-chapter-list label>span{gap:2px;min-width:0;display:grid}.onboarding-chapter-list small{color:var(--muted);overflow-wrap:anywhere}.onboarding-baseline-note,.onboarding-footer p{color:var(--muted);margin:0;font-size:.78rem;line-height:1.5}.onboarding-footer{justify-content:space-between;align-items:center;gap:16px;display:flex}.onboarding-footer p{max-width:460px}.onboarding-save-copy{gap:5px;min-width:0;display:grid}.onboarding-save-copy>small{color:var(--muted);font-size:.72rem;line-height:1.45}.onboarding-save-error{font-weight:700;color:#9b1c1c!important}.onboarding-save-actions{flex:none;align-items:center;gap:8px;display:flex}.onboarding-save-actions .primary-button,.onboarding-save-actions .secondary-button{min-height:42px}@media (max-width:560px){.onboarding-shell{align-items:start;padding:10px}.onboarding-card{border-radius:22px;gap:12px;padding:15px}.onboarding-brand{gap:10px}.onboarding-logo{border-radius:13px;flex-basis:40px;width:40px;height:40px}.onboarding-section{border-radius:17px;padding:13px}.onboarding-choice-grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}.onboarding-inline-field,.onboarding-inline-field.wide,.onboarding-chapter-list label{grid-template-columns:1fr}.onboarding-rest-days>div{grid-template-columns:repeat(4,minmax(0,1fr))}.onboarding-footer{display:grid}.onboarding-save-actions{width:100%;display:grid}.onboarding-save-actions .primary-button,.onboarding-save-actions .secondary-button{width:100%;min-height:48px}}@media (prefers-reduced-motion:reduce){.onboarding-choice-grid button,.onboarding-rest-days button{transition:none}}.exercise-dual-progress{color:var(--muted);flex-wrap:wrap;gap:10px 18px;margin-top:8px;font-size:.76rem;display:flex}.exercise-dual-progress strong{color:#25324b}.practice-scope-switcher{background:#f7f9fc;border:1px solid #dfe5ef;border-radius:15px;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;padding:5px;display:grid}.practice-scope-switcher button{color:#647089;min-height:42px;font:inherit;cursor:pointer;background:0 0;border:0;border-radius:11px;font-size:.78rem;font-weight:850}.practice-scope-switcher button.active{color:#263a93;background:#fff;box-shadow:0 4px 16px #22305317}.core-path-policy-note{color:#56627c;background:#f7f8ff;border:1px solid #dfe5f5;border-radius:13px;margin:10px 0 0;padding:11px 13px;font-size:.76rem;line-height:1.5}.exercise-question-meta-line{align-items:center;gap:6px;min-height:18px;margin-bottom:3px;display:flex}.pedagogy-tier-badge{letter-spacing:.02em;border-radius:999px;align-items:center;min-height:18px;padding:2px 7px;font-size:.62rem;font-weight:900;display:inline-flex}.pedagogy-tier-badge.core{color:#3045ad;background:#e9edff}.pedagogy-tier-badge.reinforcement{color:#28735f;background:#eef7f4}.pedagogy-tier-badge.reference{color:#687184;background:#f1f3f6}.core-path-completion-card{border-color:#d9e0ff}.progress-page-v2{gap:18px;display:grid}.progress-dimension-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;display:grid}.progress-dimension-card,.progress-detail-card,.progress-subject-coverage{background:#ffffffe6;border:1px solid #e1e6ef;border-radius:20px;box-shadow:0 10px 30px #232f4c0f}.progress-dimension-card{gap:8px;padding:16px;display:grid}.progress-dimension-card>span{color:var(--muted);font-size:.76rem;font-weight:800}.progress-dimension-card>strong{font-size:clamp(1.8rem,6vw,2.5rem);line-height:1}.progress-dimension-card>p{color:var(--muted);margin:0;font-size:.74rem;line-height:1.45}.progress-dimension-card.primary{background:linear-gradient(#f8f9ff,#fff);border-color:#d8deff}.progress-detail-card,.progress-subject-coverage{padding:18px}.progress-detail-rows{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:12px 0;display:grid}.progress-detail-rows>div{background:#f6f8fb;border-radius:13px;gap:3px;padding:12px;display:grid}.progress-detail-rows span{color:var(--muted);font-size:.72rem}.progress-detail-rows strong{font-size:1rem}@media (max-width:640px){.progress-dimension-grid,.progress-detail-rows{grid-template-columns:1fr}.practice-scope-switcher{z-index:4;position:sticky;top:8px}}.subject-progress-dimensions{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.subject-progress-dimensions>div{background:#f8fafc;border:1px solid #e2e7ef;border-radius:13px;gap:2px;min-width:0;padding:11px 12px;display:grid}.subject-progress-dimensions span,.subject-progress-dimensions small{color:var(--muted);font-size:.68rem}.subject-progress-dimensions strong{font-size:1.05rem}@media (max-width:520px){.subject-progress-dimensions{grid-template-columns:1fr}}.math-focus-card{border:1px solid var(--line,#94a3b838);background:#ffffff0a;border-radius:18px;gap:14px;padding:16px;display:grid}.math-focus-head{justify-content:space-between;align-items:flex-start;gap:14px;display:flex}.math-focus-head h3{margin:2px 0 5px}.math-focus-mode{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}.math-focus-mode .segment{border:1px solid var(--line,#94a3b838);min-width:0;color:inherit;font:inherit;cursor:pointer;background:0 0;border-radius:12px;padding:10px 12px}.math-focus-mode .segment.active{border-color:currentColor;font-weight:750}.math-focus-mode .segment:disabled{opacity:.48;cursor:not-allowed}.math-focus-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.math-focus-choice{text-align:left;border:1px solid var(--line,#94a3b838);min-width:0;color:inherit;cursor:pointer;background:0 0;border-radius:12px;gap:4px;padding:10px;display:grid}.math-focus-choice span{opacity:.78;overflow-wrap:anywhere;font-size:.78rem}.math-focus-choice:disabled{opacity:.5;cursor:default}.math-focus-rule{opacity:.78;margin:0;font-size:.82rem}@media (max-width:520px){.math-focus-head{display:grid}.math-focus-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.physics-subject-card{border-color:#d9e4f1}.physics-chapter-list{max-height:430px;margin-top:14px;padding-right:4px;overflow-y:auto}.physics-chapter-list .chapter-row>span:first-child{gap:3px;display:grid}.physics-chapter-list .chapter-row small{color:var(--muted);font-size:.7rem;font-weight:600}.chapter-focus-panel{background:#fbfcff;border:1px solid #e1e5ed;border-radius:16px;gap:11px;margin-top:15px;padding:14px;display:grid}.chapter-focus-heading{align-items:flex-start}.chapter-focus-heading strong{margin-top:3px;display:block}.chapter-focus-modes{background:#eef1f7;border-radius:11px;gap:6px;padding:3px;display:flex}.chapter-focus-modes button{color:#657085;cursor:pointer;background:0 0;border:0;border-radius:8px;padding:7px 9px;font-size:.7rem;font-weight:800}.chapter-focus-modes button.active{color:#373b86;background:#fff;box-shadow:0 2px 8px #17203314}.chapter-focus-modes button:disabled{opacity:.45;cursor:not-allowed}.chapter-focus-options{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;display:grid}.chapter-focus-options button{text-align:left;color:#4b5569;cursor:pointer;background:#fff;border:1px solid #dfe3eb;border-radius:10px;min-width:0;padding:9px;font-size:.72rem;font-weight:750}.physics-study-page{max-width:980px}.physics-study-header{margin-bottom:14px}.physics-study-summary{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-bottom:15px;display:grid}.physics-study-summary>div{border:1px solid var(--line);background:var(--surface);border-radius:14px;gap:3px;padding:13px;display:grid}.physics-study-summary span{color:var(--muted);font-size:.7rem;font-weight:750}.physics-study-summary strong{font-size:1.08rem}.physics-study-summary small{color:#80889a;font-size:.68rem}.physics-learning-card,.physics-practice-section,.physics-exam-prep-card,.physics-optional-practice,.physics-source-defects{border:1px solid var(--line);background:var(--surface);border-radius:17px;margin-top:15px;padding:16px}.physics-topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:12px;display:grid}.physics-topic-grid>div{background:#f7f8fb;border-radius:11px;gap:3px;padding:10px 11px;display:grid}.physics-topic-grid strong{font-size:.78rem;line-height:1.35}.physics-topic-grid small{color:var(--muted);font-size:.66rem}.physics-formula-stack{margin-top:12px}.physics-formula-stack .formula-chip{gap:4px;display:grid}.physics-formula-stack .formula-chip>span:last-child{color:var(--muted);font-size:.67rem}.physics-example-strip{background:#f6f8fc;border-radius:12px;gap:8px;margin-top:13px;padding:12px;display:grid}.physics-example-strip>div{flex-wrap:wrap;gap:6px;display:flex}.physics-example-strip>div span{background:#fff;border:1px solid #dce2ec;border-radius:999px;padding:6px 8px;font-size:.7rem;font-weight:700}.physics-example-strip small{color:var(--muted);font-size:.68rem}.physics-practice-list{gap:11px;margin-top:13px;display:grid}.physics-practice-card{background:#fff;border:1px solid #dfe3eb;border-radius:14px;gap:10px;padding:13px;display:grid}.physics-practice-card.complete{background:#f7fcf9;border-color:#a9d8c4}.physics-practice-meta{align-items:center;gap:10px}.physics-practice-meta>div{align-items:center;gap:7px;min-width:0;display:flex}.physics-practice-meta>span{color:var(--muted);white-space:nowrap;font-size:.68rem}.policy-tier-pill{color:#5258a8;text-transform:capitalize;background:#eceffc;border-radius:999px;padding:4px 7px;font-size:.62rem;font-weight:850;display:inline-flex}.policy-tier-pill.reinforcement{color:#3f7962;background:#edf7f2}.policy-tier-pill.reference{color:#697181;background:#f2f3f5}.physics-question-text{overflow-wrap:anywhere;font-size:.82rem;line-height:1.55}.physics-source-options{background:#f8f9fb;border-radius:10px;gap:5px;padding:9px 10px;font-size:.76rem;display:grid}.physics-source-options>div{overflow-wrap:anywhere;min-width:0}.source-defect-note{color:#806827;background:#fffaf0;border:1px solid #ead9aa;border-radius:10px;padding:8px 10px;font-size:.7rem;font-weight:720}.physics-practice-actions{align-items:center;gap:8px}.physics-practice-actions .muted{text-transform:capitalize;font-size:.68rem}.physics-optional-practice>summary,.physics-source-defects>summary{cursor:pointer;color:#3f4657;font-weight:850}.physics-checkpoint-card{margin-top:15px}.physics-checkpoint-inner{gap:14px;width:100%;display:grid}.physics-checkpoint-card .checkpoint-option{text-align:left;width:100%}.physics-exam-targets{gap:9px;margin-top:12px;display:grid}.physics-exam-targets article{background:#fff;border:1px solid #e0e4ec;border-radius:12px;padding:11px 12px}.physics-exam-targets article span{color:#5a6198;font-size:.66rem;font-weight:850}.physics-exam-targets article p{color:#50596b;margin-top:7px;font-size:.77rem;line-height:1.5}.physics-finish-chapter{width:100%;margin-top:12px}.physics-source-defects>div{background:#fffaf0;border-radius:10px;margin-top:10px;padding:10px}.physics-source-defects p{color:#6e654d;margin-top:4px;font-size:.73rem;line-height:1.45}.physics-progress-summary{margin-bottom:13px}.physics-progress-chapters{max-height:560px;padding-right:3px;overflow-y:auto}@media (max-width:640px){.chapter-focus-heading{gap:9px;display:grid}.chapter-focus-modes{width:100%}.chapter-focus-modes button{flex:1}.chapter-focus-options,.physics-topic-grid,.physics-study-summary{grid-template-columns:1fr}.physics-practice-meta,.physics-practice-actions{flex-direction:column;align-items:flex-start}.physics-practice-meta>span{white-space:normal}.physics-practice-actions .primary-compact-button,.physics-practice-actions .secondary-button{width:100%}.physics-exam-targets .row-between{flex-direction:column;align-items:flex-start}}.physics-checkpoint-ready>div{min-width:0}.physics-chapter-commit-card{gap:12px;display:grid}.physics-pdf-download{justify-content:center;align-items:center;width:max-content;margin:12px 0;text-decoration:none;display:inline-flex}@media (max-width:640px){.physics-checkpoint-ready{flex-direction:column;align-items:stretch}.physics-checkpoint-ready .primary-button,.physics-checkpoint-ready .secondary-button,.physics-pdf-download,.physics-finish-chapter{width:100%}}.student-subject-card{border:1px solid var(--line);background:var(--surface);border-radius:20px;padding:18px;box-shadow:0 8px 26px #1720330b}.student-subject-card-top{align-items:flex-start;gap:12px;display:flex}.student-subject-card-top>div{min-width:0}.student-subject-title-row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.student-subject-title-row h2{margin:0}.student-subject-card-top p{color:var(--muted);margin-top:5px;font-size:.82rem;line-height:1.5}.student-current-study{background:#f8f9fd;border:1px solid #dfe4ef;border-radius:16px;justify-content:space-between;align-items:center;gap:14px;margin-top:15px;padding:14px;display:flex}.student-current-study>div{gap:3px;min-width:0;display:grid}.student-current-study span{color:var(--muted);text-transform:uppercase;letter-spacing:.04em;font-size:.7rem;font-weight:800}.student-current-study strong{font-size:.96rem;line-height:1.35}.student-current-study small{color:var(--muted);line-height:1.4}.student-current-study .primary-button{flex:none}.student-friendly-progress{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:10px;display:grid}.student-friendly-progress>div{background:#fbfcfe;border:1px solid #e8ebf2;border-radius:12px;justify-content:space-between;gap:12px;padding:10px 12px;display:flex}.student-friendly-progress span{color:var(--muted);font-size:.72rem}.student-friendly-progress strong{font-size:.84rem}.student-subject-details{border-top:1px solid #edf0f5;margin-top:12px;padding-top:11px}.student-subject-details>summary{cursor:pointer;color:#4e55a4;font-size:.78rem;font-weight:850}.student-subject-details[open]>summary{margin-bottom:12px}.student-advanced-progress-note{background:#f7f8fb;border-radius:12px;justify-content:space-between;gap:10px;margin:12px 0;padding:10px 12px;font-size:.72rem;display:flex}.student-advanced-progress-note span{color:var(--muted)}.student-simple-chapter-list{gap:5px;margin-top:10px;display:grid}.student-simple-chapter-list button{text-align:left;background:#fff;border:1px solid #e7eaf0;border-radius:10px;grid-template-columns:24px minmax(0,1fr) auto;align-items:center;gap:8px;width:100%;padding:9px 10px;display:grid}.student-simple-chapter-list button:disabled{opacity:.62;cursor:default}.student-simple-chapter-list strong{font-size:.75rem}.student-simple-chapter-list small{color:var(--muted);font-size:.67rem}.student-simple-unit-list{gap:6px;margin-top:12px;display:grid}.student-simple-unit-row{background:#fff;border:1px solid #e7eaf0;border-radius:11px;grid-template-columns:24px minmax(0,1fr);align-items:center;gap:8px;padding:10px 11px;display:grid}.student-simple-unit-row.current{background:#f7f7ff;border-color:#cbd0ff}.student-simple-unit-row>span{color:#555cc1;text-align:center;font-weight:900}.student-simple-unit-row>div{gap:2px;min-width:0;display:grid}.student-simple-unit-row strong{font-size:.76rem;line-height:1.35}.student-simple-unit-row small{color:var(--muted);font-size:.68rem}.student-advanced-math-details{border-top:1px solid #edf0f5;margin-top:12px;padding-top:10px}.student-advanced-math-details>summary{cursor:pointer;color:var(--muted);font-size:.7rem;font-weight:800}.student-advanced-math-details[open]>summary{margin-bottom:10px}.student-source-details{margin-top:14px}.student-source-details>summary{cursor:pointer;color:var(--muted);text-align:center;font-size:.72rem;font-weight:800}.student-source-details[open]>summary{margin-bottom:10px}.student-source-details .info-card{margin:0}.student-order-card{background:#fafbfe;border:1px solid #e0e4ee;border-radius:14px;padding:13px}.student-order-heading{justify-content:space-between;align-items:flex-start;gap:14px;display:flex}.student-order-heading h3{margin:2px 0 4px;font-size:.92rem}.student-order-heading p{color:var(--muted);font-size:.75rem;line-height:1.45}.help-link-button{color:#4f55c9;cursor:pointer;background:0 0;border:0;padding:4px 0;font-weight:850}.student-active-order-note{color:#555d70;margin:10px 0 0;font-size:.73rem}.student-chapter-choice-list{margin-top:12px}.student-chapter-choice-list>p{margin-bottom:8px;font-size:.75rem;font-weight:800}.student-chapter-choice-list>div{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;display:grid}.student-chapter-choice-list button{text-align:left;background:#fff;border:1px solid #dfe4ee;border-radius:10px;gap:2px;padding:9px 10px;display:grid}.student-chapter-choice-list button span{color:var(--muted);font-size:.68rem}.study-order-modal-backdrop{z-index:1000;-webkit-backdrop-filter:blur(7px);backdrop-filter:blur(7px);background:#14192a7a;place-items:center;padding:18px;display:grid;position:fixed;inset:0}.study-order-modal{background:#fff;border-radius:22px;width:min(520px,100%);padding:22px;box-shadow:0 24px 80px #0f142838}.study-order-modal-icon{background:var(--brand-soft);width:38px;height:38px;color:var(--brand-dark);border-radius:12px;place-items:center;font-weight:950;display:grid}.study-order-modal h2{margin:12px 0 7px}.study-order-modal>p{color:var(--muted);line-height:1.55}.study-order-modal-explainer{gap:8px;margin:16px 0;display:grid}.study-order-modal-explainer>div{background:#fafbfe;border:1px solid #e4e7ef;border-radius:12px;gap:2px;padding:11px 12px;display:grid}.study-order-modal-explainer span{color:var(--muted);font-size:.78rem}.study-order-modal-note{font-size:.76rem}.study-order-modal-actions{justify-content:flex-end;gap:8px;margin-top:18px;display:flex}.student-chapter-hero{justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:12px;display:flex}.student-chapter-hero h1{margin:3px 0 6px}.student-chapter-hero p{color:var(--muted);line-height:1.5}.student-step-badge{color:#474db5;background:#eef0ff;border-radius:999px;flex:none;padding:7px 10px;font-size:.72rem;font-weight:900}.student-chapter-progress{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.student-chapter-progress>div{background:#fff;border:1px solid #e4e7ef;border-radius:12px;justify-content:space-between;gap:8px;padding:10px 12px;display:flex}.student-chapter-progress span{color:var(--muted);font-size:.7rem}.student-chapter-progress strong{font-size:.76rem}.physics-study-stage{border:1px solid var(--line);background:var(--surface);border-radius:18px;margin-top:14px;padding:17px}.physics-stage-heading{justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.physics-stage-heading h2{margin:2px 0 5px;font-size:1.05rem}.physics-stage-heading p{color:var(--muted);font-size:.78rem;line-height:1.5}.stage-count{color:#626b7e;background:#f0f2f7;border-radius:999px;flex:none;padding:6px 9px;font-size:.68rem;font-weight:900}.stage-count.complete{color:#237356;background:#e9f8f0}.physics-learning-steps{gap:8px;margin-top:14px;display:grid}.physics-learning-step{background:#fff;border:1px solid #e2e6ee;border-radius:13px;grid-template-columns:34px minmax(0,1fr) auto;align-items:center;gap:10px;padding:11px;display:grid}.physics-learning-step.complete{background:#f7fcf9;border-color:#b7ddcb}.physics-learning-step-number{color:#4d53c2;background:#eef0ff;border-radius:9px;place-items:center;width:30px;height:30px;font-size:.72rem;font-weight:900;display:grid}.physics-learning-step-copy{gap:3px;min-width:0;display:grid}.physics-learning-step-copy>strong{font-size:.8rem;line-height:1.35}.physics-learning-step-copy>span{color:var(--muted);font-size:.67rem}.topic-done-button,.done-button{color:#4f5668;cursor:pointer;background:#fff;border:1px solid #dfe3ec;border-radius:10px;padding:7px 9px;font-size:.7rem;font-weight:850}.topic-done-button.complete,.done-button.complete{color:#247258;background:#eaf8f1;border-color:#add8c3}.physics-step-formulas{margin-top:4px}.physics-step-formulas>summary,.physics-mcq-options>summary{cursor:pointer;color:#555bb9;font-size:.68rem;font-weight:800}.physics-step-formulas>div{gap:5px;margin-top:6px;display:grid}.physics-step-formulas>div>div{background:#f7f8fb;border-radius:9px;flex-wrap:wrap;align-items:baseline;gap:8px;padding:7px 8px;display:flex}.physics-step-formulas small{color:var(--muted)}.physics-worked-examples-simple{border-top:1px solid #edf0f5;margin-top:12px;padding-top:10px}.physics-worked-examples-simple>summary{cursor:pointer;font-size:.76rem;font-weight:850}.physics-worked-examples-simple>div{flex-wrap:wrap;gap:6px;margin-top:8px;display:flex}.physics-worked-examples-simple span{background:#f5f7fb;border-radius:999px;padding:6px 8px;font-size:.68rem}.physics-practice-actions{justify-content:flex-end;display:flex}.physics-mcq-options{margin-top:-2px}.student-checkpoint-card{border-radius:18px}.physics-checkpoint-ready{justify-content:space-between;align-items:center;gap:18px;width:100%;display:flex}.physics-checkpoint-ready h2{margin:2px 0 5px}.physics-checkpoint-ready p{color:var(--muted);font-size:.78rem;line-height:1.5}.physics-exam-target-details{margin-top:12px}.physics-exam-target-details>summary{cursor:pointer;color:#555bb9;font-size:.76rem;font-weight:850}.physics-pdf-download{justify-content:center;margin-top:12px;text-decoration:none;display:inline-flex}.planner-source-note{background:#f7f8fb;border-radius:11px;gap:3px;margin:10px 12px 12px;padding:10px 12px;display:grid}.planner-source-note strong{font-size:.72rem}.planner-source-note span,.planner-source-note small{color:var(--muted);font-size:.68rem;line-height:1.45}.planner-explain-details,.planner-week-details{background:#fbfcfe;border:1px solid #e4e7ef;border-radius:15px;margin:10px 0 14px}.planner-explain-details>summary,.planner-week-details>summary{cursor:pointer;color:#5057a8;padding:12px 14px;font-size:.76rem;font-weight:850}.planner-explain-details[open]>summary,.planner-week-details[open]>summary{border-bottom:1px solid #e8ebf2}.planner-explain-details .planner-week-summary,.planner-week-details .planner-week-section,.planner-week-details .planner-subject-section{margin:12px}@media (max-width:720px){.student-current-study,.student-order-heading,.student-chapter-hero,.physics-stage-heading,.physics-checkpoint-ready{flex-direction:column;align-items:stretch}.student-current-study .primary-button,.physics-checkpoint-ready .primary-button,.physics-checkpoint-ready .secondary-button{width:100%}.student-friendly-progress,.student-chapter-progress,.student-chapter-choice-list>div{grid-template-columns:1fr}.physics-learning-step{grid-template-columns:30px minmax(0,1fr)}.physics-learning-step .topic-done-button{grid-column:1/-1;width:100%}.study-order-modal-actions{flex-direction:column-reverse}.study-order-modal-actions button{width:100%}}.study-flow-tabs{border:1px solid var(--line);background:#f1f3f8;border-radius:14px;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;padding:4px;display:grid}.study-flow-tabs button{color:#626a7d;cursor:pointer;background:0 0;border:0;border-radius:10px;min-height:40px;font-size:.76rem;font-weight:850}.study-flow-tabs button.active{color:var(--brand-dark);background:#fff;box-shadow:0 2px 9px #191f3714}.math-study-flow-tabs{background:0 0;border:0;padding:0;display:block}.student-study-steps{scroll-margin-top:18px}.student-context-note{padding:0;overflow:hidden}.student-context-note>summary{cursor:pointer;color:#5057a8;padding:13px 15px;font-size:.76rem;font-weight:850}.student-context-note[open]>summary{border-bottom:1px solid #e8ebf2}.student-context-note>p{color:var(--muted);margin:0;padding:13px 15px 15px;font-size:.76rem;line-height:1.55}.unified-study-flow{--study-accent:#5960d8}.physics-topic-loop-hero{background:linear-gradient(145deg,#fff,#f8f9ff);border:1px solid #e4e7ef;border-radius:18px;padding:16px 17px}.physics-topic-loop-hero small{color:var(--muted);margin-top:5px;font-size:.72rem;line-height:1.45;display:block}.physics-topic-overview{border:1px solid var(--line);background:var(--surface);border-radius:18px;margin-top:14px;padding:15px}.physics-topic-overview-heading,.physics-major-topic-heading,.physics-topic-check-heading{justify-content:space-between;align-items:flex-start;gap:14px;display:flex}.physics-topic-overview-heading h2,.physics-major-topic-heading h2,.physics-topic-check-heading h3{margin:2px 0 4px}.physics-topic-overview-heading>span{color:var(--muted);flex:none;font-size:.7rem;font-weight:800}.physics-topic-route-list{gap:7px;margin-top:12px;display:grid}.physics-topic-route-button{cursor:pointer;text-align:left;width:100%}.physics-topic-route-button>span{color:#4d53c2;background:#eef0ff;border-radius:9px;place-items:center;width:30px;height:30px;font-size:.72rem;font-weight:900;display:grid}.physics-topic-route-button>strong{min-width:0;font-size:.8rem;line-height:1.35}.physics-topic-route-button>small{color:var(--muted);font-size:.67rem;font-weight:800}.physics-topic-route-button.current{border-color:#aeb3ee;box-shadow:0 0 0 2px #5960d814}.physics-topic-route-button.complete>span{color:#237356;background:#e8f8ef}.physics-topic-route-button:disabled{opacity:.5;cursor:not-allowed}.physics-major-topic-card{background:#fff;border:1px solid #dfe3ec;border-radius:20px;margin-top:14px;padding:18px;box-shadow:0 10px 30px #1b233e0a}.physics-major-topic-heading>div{min-width:0}.physics-major-topic-heading p{color:var(--muted);font-size:.76rem;line-height:1.5}.physics-topic-tabs{margin:15px 0 12px}.physics-topic-tabs button.active{color:#373d8f}.physics-topic-panel{gap:14px;display:grid}.physics-topic-panel>section{background:#fbfcfe;border:1px solid #e8eaf0;border-radius:14px;padding:13px}.physics-topic-panel h3{margin:0 0 8px;font-size:.84rem}.physics-subtopic-section ul{gap:6px;margin:0;padding-left:20px;display:grid}.physics-subtopic-section li{color:#3f4658;font-size:.78rem;line-height:1.45}.physics-subtopic-note{color:var(--muted);margin:10px 0 0;font-size:.68rem;line-height:1.45}.physics-topic-formulas{gap:8px;display:grid}.physics-topic-formulas article{background:#fff;border-radius:11px;gap:4px;padding:10px;display:grid}.physics-topic-formulas article small{color:var(--muted);font-size:.68rem;line-height:1.4}.physics-worked-example-list{gap:7px;display:grid}.physics-worked-example-list>div{background:#fff;border-radius:10px;justify-content:space-between;gap:10px;padding:9px 10px;display:flex}.physics-worked-example-list strong{font-size:.74rem}.physics-worked-example-list span{color:var(--muted);white-space:nowrap;font-size:.68rem}.physics-topic-practice-list{gap:8px;display:grid}.physics-topic-practice-item{background:#fff;border:1px solid #e7e9ef;border-radius:11px;padding:10px 11px}.physics-topic-practice-item .row-between{gap:10px}.physics-topic-practice-item .row-between strong{font-size:.72rem}.physics-topic-practice-item .row-between span{color:var(--muted);white-space:nowrap;font-size:.66rem}.physics-topic-practice-item p{margin:7px 0 0;font-size:.76rem;line-height:1.5}.physics-major-topic-commit{background:#f8f9fc;border:1px solid #dfe3ec;border-radius:14px;justify-content:space-between;align-items:center;gap:14px;margin-top:15px;padding:13px;display:flex}.physics-major-topic-commit>div{gap:3px;display:grid}.physics-major-topic-commit strong{font-size:.78rem}.physics-major-topic-commit span{color:var(--muted);font-size:.68rem;line-height:1.4}.physics-topic-check{background:#fbfcfe;border:1px solid #e1e5ee;border-radius:15px;justify-content:space-between;align-items:center;gap:14px;margin-top:12px;padding:14px;display:flex}.physics-topic-check h3{margin:2px 0 4px;font-size:.9rem}.physics-topic-check p{color:var(--muted);margin:0;font-size:.72rem;line-height:1.45}.physics-topic-check.locked{background:#f5f6f9}.physics-topic-check.ready{background:#fafaff;border-color:#cdd1f4}.physics-topic-check.passed{background:#f7fcf9;border-color:#b5dcc9}.physics-topic-check.active{display:block}.physics-topic-check-heading>span{color:#4d53c2;background:#eef0ff;border-radius:999px;flex:none;padding:6px 9px;font-size:.68rem;font-weight:900}.checkpoint-lock-pill{color:#747b8d;background:#eceef3;border-radius:999px;flex:none;padding:6px 9px;font-size:.66rem;font-weight:850}.physics-next-topic{width:100%;margin-top:12px}.physics-finish-stage{background:#f8fcfa;border-color:#b6ddca}.physics-extra-practice{background:#fbfcfe;border:1px solid #e4e7ef;border-radius:15px;margin-top:14px;padding:13px 15px}.physics-extra-practice>summary{cursor:pointer;color:#555bb9;font-size:.75rem;font-weight:850}.physics-extra-practice>p{color:var(--muted);margin:8px 0 0;font-size:.7rem;line-height:1.45}.physics-extra-practice-list{gap:7px;margin-top:10px;display:grid}@media (max-width:720px){.physics-topic-overview-heading,.physics-major-topic-heading,.physics-topic-check-heading,.physics-major-topic-commit,.physics-topic-check{flex-direction:column;align-items:stretch}.physics-topic-tabs{z-index:4;position:sticky;top:8px}.physics-major-topic-commit button,.physics-topic-check>button{width:100%}.physics-worked-example-list>div{flex-direction:column;align-items:flex-start}.physics-worked-example-list span,.physics-topic-practice-item .row-between span{white-space:normal}}.remaining-math-exercise .question-leaf{align-items:flex-start}.source-anomaly-note{color:var(--text-muted,#667085);margin-top:6px;font-size:.78rem;display:block}.remaining-math-exercise .question-set-stem{margin:0 0 10px;font-weight:650}@media (min-width:900px){.remaining-math-exercise .math-study-desktop-grid{align-items:start}}.profile-page-v2{gap:18px}.profile-streak-section,.profile-preferences-card{border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);gap:14px;padding:17px;display:grid;box-shadow:0 6px 20px #17203309}.profile-section-heading{justify-content:space-between;align-items:flex-start;gap:14px;display:flex}.profile-section-heading h2{margin-bottom:0}.profile-section-heading>span{color:#747d8f;text-align:right;font-size:.7rem;font-weight:800}.profile-streak-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;display:grid}.profile-streak-card{background:#fafbfc;border:1px solid #e4e7ee;border-radius:16px;gap:4px;min-width:0;padding:13px;display:grid}.profile-streak-card.primary{background:#fff9ee;border-color:#f0ddbc}.profile-streak-card .app-icon{color:#6c7486;width:1.1rem;height:1.1rem}.profile-streak-card.primary .app-icon{color:#a66a13}.profile-streak-card strong{color:#252d3f;margin-top:3px;font-size:1.35rem;line-height:1}.profile-streak-card span{color:#737c8e;font-size:.66rem;line-height:1.35}.profile-streak-note{color:#788194;font-size:.7rem;line-height:1.5}.profile-settings-form{background:#fff;border:1px solid #e5e8ef;border-radius:16px;display:grid;overflow:hidden}.profile-field-row{border-bottom:1px solid #edf0f4;justify-content:space-between;align-items:center;gap:18px;padding:15px;display:flex}.profile-field-row>span{gap:3px;min-width:0;display:grid}.profile-field-row strong,.profile-rest-fieldset legend strong{color:#30394b;font-size:.82rem}.profile-field-row small,.profile-rest-fieldset legend small{color:#7b8496;font-size:.68rem;line-height:1.4}.profile-number-control{flex:none;align-items:center;gap:6px;display:flex}.profile-number-control input,.profile-date-input{color:#2c3548;background:#fbfcfd;border:1px solid #dce0e8;border-radius:11px;outline:none;min-height:42px;padding:8px 10px;font-weight:800}.profile-number-control input{text-align:right;width:88px}.profile-number-control b{color:#7b8496;font-size:.7rem}.profile-date-input{width:160px}.profile-number-control input:focus,.profile-date-input:focus{border-color:#8c8def;box-shadow:0 0 0 3px #5b5ce217}.profile-rest-fieldset{border:0;gap:12px;min-width:0;margin:0;padding:15px;display:grid}.profile-rest-fieldset legend{gap:3px;width:100%;padding:0;display:grid}.profile-rest-day-grid{grid-template-columns:repeat(7,minmax(0,1fr));gap:7px;display:grid}.profile-rest-day-grid button{color:#687286;cursor:pointer;background:#fafbfc;border:1px solid #dfe3eb;border-radius:11px;min-width:0;min-height:40px;padding:8px 4px;font-size:.7rem;font-weight:850}.profile-rest-day-grid button.active{background:var(--brand-soft);color:var(--brand-dark);border-color:#8588e2;box-shadow:inset 0 0 0 1px #5b5ce214}.profile-save-actions{justify-content:space-between;align-items:center;gap:14px;display:flex}.profile-save-actions>div{flex:1;min-width:0}.profile-save-actions .primary-button{min-width:190px}.profile-settings-error,.profile-settings-success{font-size:.72rem;line-height:1.45}.profile-settings-error{color:#a23947}.profile-settings-success{color:#177354}.profile-action-row .secondary-button{flex:none}@media (max-width:560px){.profile-page-v2 .profile-card{flex-wrap:wrap}.profile-page-v2 .profile-card .connection-badge{margin-left:60px}.profile-section-heading{align-items:flex-start}.profile-section-heading>span{max-width:42%}.profile-streak-card{padding:11px 9px}.profile-streak-card strong{font-size:1.2rem}.profile-streak-card span{font-size:.61rem}.profile-field-row{flex-direction:column;align-items:flex-start;gap:10px}.profile-number-control,.profile-date-input{width:100%}.profile-number-control input{text-align:left;width:100%}.profile-rest-day-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.profile-save-actions{flex-direction:column;align-items:stretch}.profile-save-actions .primary-button{width:100%;min-width:0}.profile-account-settings .setting-row,.profile-action-row{flex-direction:column;align-items:flex-start}.profile-account-settings .setting-row>span{text-align:left}.profile-action-row .secondary-button{width:100%}}:root{--app-bg:#f4f6fa;--app-surface:#fff;--app-surface-raised:#fff;--app-surface-soft:#f7f8fb;--app-line:#e4e7ee;--app-text:#172033;--app-muted:#6f788a;--app-accent:#5b5ce2;--app-accent-soft:#ececff;--app-control:#f4f5f8;--app-control-hover:#eceef4;--app-shadow:0 12px 34px #17203312}html[data-theme=dark]{--ink:#f5f7fb;--muted:#9da5b4;--line:#252931;--surface:#111318;--surface-soft:#171a20;--brand:#8587ff;--brand-dark:#a8a9ff;--brand-soft:#272844;--success:#4bd3a4;--success-soft:#17372e;--warning-soft:#3a2e16;--app-bg:#090a0c;--app-surface:#111318;--app-surface-raised:#17191f;--app-surface-soft:#15171c;--app-line:#252931;--app-text:#f5f7fb;--app-muted:#9da5b4;--app-accent:#888aff;--app-accent-soft:#282943;--app-control:#1b1e24;--app-control-hover:#242831;--app-shadow:0 18px 42px #00000047}html,body,#root,.app-shell{background:var(--app-bg);color:var(--app-text);transition:background-color .18s,color .18s}.profile-page-v3{gap:16px}.profile-hero-header{padding-top:max(8px, env(safe-area-inset-top))}.profile-hero-header h1{margin-bottom:6px}.profile-identity-card,.profile-streak-panel,.profile-settings-group{border:1px solid var(--app-line);background:var(--app-surface);box-shadow:var(--app-shadow)}.profile-identity-card{border-radius:24px;align-items:center;gap:14px;padding:15px;display:flex}.profile-avatar-lg{color:#fff;background:linear-gradient(145deg,#222847,#14182f);border-radius:19px;flex:none;place-items:center;width:58px;height:58px;font-size:1.16rem;font-weight:900;display:grid;box-shadow:inset 0 0 0 1px #ffffff14}html[data-theme=dark] .profile-avatar-lg{background:linear-gradient(145deg,#2d3158,#171a30)}.profile-identity-card h2{margin-bottom:3px;font-size:1.06rem}.profile-identity-card p{color:var(--app-muted);text-overflow:ellipsis;white-space:nowrap;font-size:.76rem;overflow:hidden}.profile-streak-panel,.profile-settings-group{border-radius:24px;padding:16px}.profile-panel-heading,.profile-list-heading{justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:13px;display:flex}.profile-panel-heading h2,.profile-list-heading h2{margin-bottom:0;font-size:1.03rem}.profile-panel-heading>span,.profile-list-heading>span{color:var(--app-muted);text-align:right;font-size:.68rem;font-weight:750}.profile-streak-grid-v3{gap:8px}.profile-streak-grid-v3 .profile-streak-card{border-color:var(--app-line);background:var(--app-surface-soft)}.profile-streak-grid-v3 .profile-streak-card.primary{border-color:var(--app-accent)}@supports (color:color-mix(in lab, red, red)){.profile-streak-grid-v3 .profile-streak-card.primary{border-color:color-mix(in srgb, var(--app-accent) 34%, var(--app-line))}}.profile-streak-grid-v3 .profile-streak-card.primary{background:var(--app-accent-soft)}.profile-streak-grid-v3 .profile-streak-card .app-icon{color:var(--app-muted)}.profile-streak-grid-v3 .profile-streak-card.primary .app-icon{color:#d28a20}.profile-streak-note{color:var(--app-muted)}.theme-segment{border:1px solid var(--app-line);background:var(--app-control);border-radius:18px;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;padding:5px;display:grid}.theme-segment button{min-width:0;min-height:48px;color:var(--app-muted);cursor:pointer;background:0 0;border:0;border-radius:14px;justify-content:center;align-items:center;gap:7px;padding:9px 10px;font-size:.75rem;font-weight:850;display:flex}.theme-segment button:hover{background:var(--app-control-hover)}.theme-segment button.active{background:var(--app-surface-raised);color:var(--app-text);box-shadow:0 4px 13px #17203314, inset 0 0 0 1px var(--app-line)}html[data-theme=dark] .theme-segment button.active{box-shadow:0 5px 16px #00000042,inset 0 0 0 1px #343945}.theme-segment .app-icon{width:1.05rem;height:1.05rem}.profile-settings-list{border:1px solid var(--app-line);background:var(--app-surface-soft);border-radius:18px;overflow:hidden}.profile-setting-item{border:0;border-bottom:1px solid var(--app-line);justify-content:space-between;align-items:center;gap:16px;min-width:0;margin:0;padding:14px;display:flex}.profile-setting-item:last-child{border-bottom:0}.profile-setting-item>span,.profile-setting-item>legend{gap:3px;min-width:0;display:grid}.profile-setting-item strong{color:var(--app-text);font-size:.82rem}.profile-setting-item small{color:var(--app-muted);font-size:.69rem;line-height:1.45}.profile-setting-item>b{max-width:42%;color:var(--app-muted);text-align:right;font-size:.71rem}.profile-number-control input,.profile-date-input{border-color:var(--app-line);background:var(--app-control);color:var(--app-text)}.profile-number-control b{color:var(--app-muted)}.profile-rest-item{gap:12px;width:100%;display:grid}.profile-rest-item legend{width:100%}.profile-rest-day-grid button{border-color:var(--app-line);background:var(--app-control);color:var(--app-muted)}.profile-rest-day-grid button:hover{background:var(--app-control-hover)}.profile-rest-day-grid button.active{border-color:var(--app-accent)}@supports (color:color-mix(in lab, red, red)){.profile-rest-day-grid button.active{border-color:color-mix(in srgb, var(--app-accent) 55%, var(--app-line))}}.profile-rest-day-grid button.active{background:var(--app-accent-soft);color:var(--brand-dark)}.profile-save-actions-v3{margin-top:13px}.profile-account-group .profile-setting-item,.profile-action-item{min-height:66px}.profile-action-item .secondary-button{flex:none;min-height:42px;padding-block:8px}.profile-sign-out{width:100%}.profile-demo-note>p:last-child{color:var(--app-muted);font-size:.78rem}html[data-theme=dark] body{background:var(--app-bg)}html[data-theme=dark] .desktop-rail{border-color:var(--app-line);background:#0d0f13}html[data-theme=dark] .desktop-brand p,html[data-theme=dark] .desktop-release-card p,html[data-theme=dark] .desktop-release-card>span{color:var(--app-muted)}html[data-theme=dark] .desktop-nav-item{color:#a2a9b7}html[data-theme=dark] .desktop-nav-item:hover{color:#f4f6fa;background:#181b21}html[data-theme=dark] .desktop-nav-item.active{color:#b5b6ff;background:#25263d}html[data-theme=dark] .desktop-release-card,html[data-theme=dark] :is(.subject-card,.subject-detail-card,.info-card,.profile-card,.settings-card,.overall-progress-card,.progress-row-card,.weekly-card,.achievement-card,.account-actions-card,.planner-today-card,.planner-week-section,.planner-subject-section,.planner-settings-card){border-color:var(--app-line);background:var(--app-surface);box-shadow:0 8px 24px #00000029}html[data-theme=dark] :is(.quest-card,.planner-task-card,.completion-ack,.chapter-readiness-note){border-color:var(--app-line);background:var(--app-surface-soft)}html[data-theme=dark] :is(.secondary-button,.complete-toggle,.profile-number-control input,.profile-date-input,.auth-form input){border-color:var(--app-line);background:var(--app-control);color:var(--app-text)}html[data-theme=dark] .secondary-button:hover:not(:disabled){background:var(--app-control-hover)}html[data-theme=dark] :is(.setting-row,.chapter-row){border-color:var(--app-line)}html[data-theme=dark] :is(.setting-row>span,.chapter-row,.quest-title-row,.quest-meta){color:#a8afbc}html[data-theme=dark] :is(.muted,.quest-copy>p,.subject-card p,.subject-detail-head p,.achievement-card p,.info-card p,.setting-row p){color:var(--app-muted)}html[data-theme=dark] .eyebrow{color:#8f97a7}html[data-theme=dark] .bottom-nav{background:#14161beb;border-color:#ffffff14;box-shadow:0 14px 38px #0000006b}html[data-theme=dark] .nav-item{color:#8e96a5}html[data-theme=dark] .nav-item.active{color:#f4f5ff;background:#2b2c38}@media (max-width:899px){.profile-page-v3{padding-top:16px;gap:14px;padding-inline:14px}.profile-hero-header .eyebrow{display:none}.profile-hero-header h1{letter-spacing:-.055em;margin-bottom:8px;font-size:clamp(2.55rem,13vw,3.25rem)}.profile-hero-header .muted{max-width:290px;font-size:.82rem}.profile-identity-card,.profile-streak-panel,.profile-settings-group{border-radius:22px}.profile-identity-card{padding:13px}.profile-avatar-lg{border-radius:18px;width:54px;height:54px}.profile-panel-heading>span,.profile-list-heading>span{max-width:42%}.profile-streak-grid-v3 .profile-streak-card{padding:11px 8px}.profile-streak-grid-v3 .profile-streak-card strong{font-size:1.28rem}.profile-streak-grid-v3 .profile-streak-card span{font-size:.62rem}.profile-setting-item{flex-direction:column;align-items:flex-start;gap:10px}.profile-setting-item>b{text-align:left;max-width:none}.profile-number-control,.profile-date-input{width:100%}.profile-number-control input{text-align:left;width:100%}.profile-rest-day-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.profile-save-actions-v3{flex-direction:column;align-items:stretch}.profile-save-actions-v3 .primary-button{width:100%;min-width:0}.profile-action-item .secondary-button{width:100%}.bottom-nav{left:12px;right:12px;bottom:max(10px, env(safe-area-inset-bottom));background:#ffffffeb;border:1px solid #dadee7d1;border-radius:28px;padding:5px;box-shadow:0 14px 38px #17203324}.nav-item{border-radius:22px;min-height:58px}.app-main{padding-bottom:calc(118px + env(safe-area-inset-bottom))}}@media (min-width:900px){html[data-theme=dark] body{background:var(--app-bg)}.profile-page-v3{grid-template-columns:minmax(0,1.15fr) minmax(310px,.85fr);gap:18px}.profile-hero-header,.profile-identity-card,.profile-study-settings,.profile-account-group,.profile-session-group,.profile-demo-note{grid-column:1/-1}.profile-hero-header h1{font-size:2.5rem}.profile-identity-card{padding:17px 18px}.profile-streak-panel,.profile-settings-group{padding:18px}}:root,html[data-theme=light]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--theme-bg:#f5f7fb;--theme-surface:#fff;--theme-surface-raised:#fff;--theme-surface-soft:#f0f3f8;--theme-surface-sunken:#e9edf4;--theme-border:#d7dde8;--theme-border-strong:#c5cdda;--theme-text:#111827;--theme-text-secondary:#4b5565;--theme-text-muted:#687386;--theme-accent:#4657e8;--theme-accent-strong:#3346ce;--theme-accent-soft:#eef0ff;--theme-accent-border:#c8ceff;--theme-success:#147a55;--theme-success-soft:#eaf8f1;--theme-warning:#8a5a11;--theme-warning-soft:#fff5dd;--theme-danger:#b13d4e;--theme-danger-soft:#fff0f2;--theme-progress-track:#e3e7ef;--theme-nav:#f8fafd;--theme-nav-active:#eef0ff;--theme-overlay:#1118277a;--theme-shadow-sm:0 5px 16px #1118270b;--theme-shadow-md:0 10px 28px #11182711;--theme-shadow-lg:0 18px 50px #11182718;--ink:var(--theme-text);--muted:var(--theme-text-muted);--line:var(--theme-border);--surface:var(--theme-surface);--surface-soft:var(--theme-surface-soft);--brand:var(--theme-accent);--brand-dark:var(--theme-accent-strong);--brand-soft:var(--theme-accent-soft);--success:var(--theme-success);--success-soft:var(--theme-success-soft);--warning-soft:var(--theme-warning-soft);--app-bg:var(--theme-bg);--app-surface:var(--theme-surface);--app-surface-raised:var(--theme-surface-raised);--app-surface-soft:var(--theme-surface-soft);--app-line:var(--theme-border);--app-text:var(--theme-text);--app-muted:var(--theme-text-muted);--app-accent:var(--theme-accent);--app-accent-soft:var(--theme-accent-soft);--app-control:var(--theme-surface-soft);--app-control-hover:var(--theme-surface-sunken);--app-shadow:var(--theme-shadow-md)}html[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--theme-bg:#0b0d12;--theme-surface:#151922;--theme-surface-raised:#1b202b;--theme-surface-soft:#10141b;--theme-surface-sunken:#0e1117;--theme-border:#2d3544;--theme-border-strong:#414b5e;--theme-text:#f5f7fb;--theme-text-secondary:#c2c8d2;--theme-text-muted:#9aa4b5;--theme-accent:#9aa2ff;--theme-accent-strong:#b5bbff;--theme-accent-soft:#252b4a;--theme-accent-border:#434d80;--theme-success:#5ed6a7;--theme-success-soft:#143126;--theme-warning:#f2bc66;--theme-warning-soft:#332714;--theme-danger:#ff8c9c;--theme-danger-soft:#3a1b22;--theme-progress-track:#2a3240;--theme-nav:#10141b;--theme-nav-active:#272d4b;--theme-overlay:#000000a8;--theme-shadow-sm:0 6px 18px #0000002e;--theme-shadow-md:0 14px 34px #00000042;--theme-shadow-lg:0 22px 60px #00000057;--ink:var(--theme-text);--muted:var(--theme-text-muted);--line:var(--theme-border);--surface:var(--theme-surface);--surface-soft:var(--theme-surface-soft);--brand:var(--theme-accent);--brand-dark:var(--theme-accent-strong);--brand-soft:var(--theme-accent-soft);--success:var(--theme-success);--success-soft:var(--theme-success-soft);--warning-soft:var(--theme-warning-soft);--app-bg:var(--theme-bg);--app-surface:var(--theme-surface);--app-surface-raised:var(--theme-surface-raised);--app-surface-soft:var(--theme-surface-soft);--app-line:var(--theme-border);--app-text:var(--theme-text);--app-muted:var(--theme-text-muted);--app-accent:var(--theme-accent);--app-accent-soft:var(--theme-accent-soft);--app-control:var(--theme-surface-soft);--app-control-hover:var(--theme-surface-raised);--app-shadow:var(--theme-shadow-md)}html[data-theme]{background:var(--theme-bg)}html[data-theme] body,html[data-theme] #root,html[data-theme] .app-shell{background:var(--theme-bg);color:var(--theme-text)}html[data-theme] .app-main,html[data-theme] .page,html[data-theme] .simple-header h1,html[data-theme] .hero-header h1,html[data-theme] .simple-header h2,html[data-theme] .section-heading h2{color:var(--theme-text)}html[data-theme] .muted,html[data-theme] .eyebrow{color:var(--theme-text-muted)}html[data-theme] button:focus-visible,html[data-theme] input:focus-visible,html[data-theme] summary:focus-visible,html[data-theme] a:focus-visible{outline-color:var(--theme-accent)}@supports (color:color-mix(in lab, red, red)){html[data-theme] button:focus-visible,html[data-theme] input:focus-visible,html[data-theme] summary:focus-visible,html[data-theme] a:focus-visible{outline-color:color-mix(in srgb, var(--theme-accent) 55%, transparent)}}html[data-theme] ::selection{background:var(--theme-accent-soft);color:var(--theme-text)}html[data-theme] :is(.subject-card,.subject-detail-card,.info-card,.profile-card,.settings-card,.auth-foundation-card,.overall-progress-card,.progress-row-card,.weekly-card,.achievement-card,.account-actions-card,.planner-today-card,.planner-week-section,.planner-subject-section,.planner-settings-card,.progress-dimension-card,.progress-detail-card,.progress-subject-coverage,.student-subject-card,.physics-learning-card,.physics-practice-section,.physics-exam-prep-card,.physics-optional-practice,.physics-source-defects,.exercise-learning-panel,.exercise-unlock-card,.exercise-loading-card,.exercise-completion-card,.checkpoint-card){border-color:var(--theme-border);background:var(--theme-surface);color:var(--theme-text);box-shadow:var(--theme-shadow-sm)}html[data-theme] :is(.quest-card,.planner-task-card,.planner-day,.planner-week-summary>div,.planner-subject-balance article,.progress-detail-rows>div,.subject-progress-dimensions>div,.student-friendly-progress>div,.student-current-study,.student-simple-unit-row,.student-simple-chapter-list button,.student-order-card,.subject-coverage-note,.chapter-focus-panel,.physics-topic-grid>div,.physics-example-strip,.physics-source-options,.review-source-note,.chapter-readiness-note,.completion-ack){border-color:var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text)}html[data-theme] :is(.quest-title-row,.quest-meta,.chapter-row,.chapter-row span:last-child,.setting-row>span,.planner-task-kind,.planner-task-card p,.planner-day>span,.planner-day small,.planner-settings-grid small,.planner-rest-settings small,.progress-dimension-card>span,.progress-dimension-card>p,.progress-detail-rows span,.subject-progress-dimensions span,.subject-progress-dimensions small,.student-current-study span,.student-current-study small,.student-friendly-progress span,.student-simple-unit-row small,.student-simple-chapter-list small,.physics-study-summary span,.physics-study-summary small,.physics-topic-grid small,.physics-example-strip small,.physics-practice-meta>span,.exercise-question-copy small,.exercise-progress-meta,.checkpoint-attempts){color:var(--theme-text-muted)}html[data-theme] :is(.chapter-row,.student-subject-details,.student-advanced-math-details,.student-simple-unit-row,.student-simple-chapter-list button,.exercise-question,.exercise-question-group>summary,.setting-row,.profile-setting-item){border-color:var(--theme-border)}html[data-theme] .progress-dimension-card,html[data-theme] .progress-detail-card,html[data-theme] .progress-subject-coverage{background:var(--theme-surface);border-color:var(--theme-border);box-shadow:var(--theme-shadow-md)}html[data-theme] .progress-dimension-card.primary{border-color:var(--theme-accent-border);background:linear-gradient(180deg, var(--theme-accent-soft), var(--theme-surface))}html[data-theme] .progress-dimension-card>strong,html[data-theme] .progress-detail-rows strong,html[data-theme] .progress-policy-unit strong,html[data-theme] .progress-row-card strong{color:var(--theme-text)}html[data-theme] .progress-detail-rows>div,html[data-theme] .subject-progress-dimensions>div{background:var(--theme-surface-soft);border:1px solid var(--theme-border)}html[data-theme] .progress-track{background:var(--theme-progress-track);box-shadow:inset 0 0 0 1px var(--theme-border)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .progress-track{box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--theme-border) 70%, transparent)}}html[data-theme] .progress-fill{background:var(--theme-accent)}html[data-theme] .progress-ring{background:conic-gradient(var(--theme-accent) var(--value), var(--theme-progress-track) 0)}html[data-theme] .progress-ring:before{background:var(--theme-surface)}html[data-theme] .desktop-rail{border-color:var(--theme-border);background:var(--theme-nav)}html[data-theme] .desktop-nav-item{color:var(--theme-text-muted)}html[data-theme] .desktop-nav-item:hover{background:var(--theme-surface-soft);color:var(--theme-text)}html[data-theme] .desktop-nav-item.active{background:var(--theme-nav-active);color:var(--theme-accent-strong)}html[data-theme] .desktop-release-card{border-color:var(--theme-border);background:var(--theme-surface);box-shadow:var(--theme-shadow-sm)}html[data-theme] .desktop-release-card strong{color:var(--theme-text)}html[data-theme] .desktop-release-card p,html[data-theme] .desktop-release-card>span{color:var(--theme-text-muted)}html[data-theme] .bottom-nav{border-color:var(--theme-border)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .bottom-nav{border-color:color-mix(in srgb, var(--theme-border) 86%, transparent)}}html[data-theme] .bottom-nav{background:var(--theme-nav)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .bottom-nav{background:color-mix(in srgb, var(--theme-nav) 94%, transparent)}}html[data-theme] .bottom-nav{box-shadow:var(--theme-shadow-lg);-webkit-backdrop-filter:blur(22px)saturate(145%);backdrop-filter:blur(22px)saturate(145%)}html[data-theme] .nav-item{color:var(--theme-text-muted)}html[data-theme] .nav-item.active{background:var(--theme-nav-active);color:var(--theme-accent-strong)}html[data-theme] :is(.secondary-button,.complete-toggle,.planner-settings-grid input,.planner-rest-settings button,.profile-number-control input,.profile-date-input,.auth-form input,.chapter-focus-options button,.math-focus-mode .segment,.math-focus-choice){border-color:var(--theme-border);background:var(--theme-surface-raised);color:var(--theme-text-secondary)}html[data-theme] :is(.secondary-button,.planner-rest-settings button,.chapter-focus-options button,.math-focus-mode .segment,.math-focus-choice):hover:not(:disabled){background:var(--theme-surface-soft);color:var(--theme-text)}html[data-theme] .primary-button,html[data-theme] .primary-compact-button{background:var(--theme-accent);color:#fff}html[data-theme=dark] .primary-button,html[data-theme=dark] .primary-compact-button{color:#10131a}html[data-theme] .text-button,html[data-theme] .help-link-button{color:var(--theme-accent-strong)}html[data-theme] .text-button:hover{background:var(--theme-accent-soft)}html[data-theme] .planner-mode-pill{border-color:var(--theme-border);background:var(--theme-surface)}html[data-theme] .planner-mode-pill strong{color:var(--theme-text)}html[data-theme] .planner-mode-pill span{color:var(--theme-text-muted)}html[data-theme] .planner-time-badge{border-color:var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-secondary)}html[data-theme] .planner-task-number{background:var(--theme-accent-soft);color:var(--theme-accent-strong)}html[data-theme] .planner-day strong,html[data-theme] .planner-week-summary strong,html[data-theme] .planner-subject-balance strong,html[data-theme] .planner-settings-grid label>span,html[data-theme] .planner-rest-settings>span{color:var(--theme-text)}html[data-theme] .planner-day.today{border-color:var(--theme-accent-border);background:var(--theme-accent-soft)}html[data-theme] .planner-day.rest,html[data-theme] .planner-rest-card{border-color:var(--theme-warning)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .planner-day.rest,html[data-theme] .planner-rest-card{border-color:color-mix(in srgb, var(--theme-warning) 38%, var(--theme-border))}}html[data-theme] .planner-day.rest,html[data-theme] .planner-rest-card{background:var(--theme-warning-soft)}html[data-theme] .planner-rest-settings button.active{border-color:var(--theme-accent-border);background:var(--theme-accent-soft);color:var(--theme-accent-strong)}html[data-theme] .planner-coverage-note{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .planner-coverage-note{border-color:color-mix(in srgb, var(--theme-success) 35%, var(--theme-border))}}html[data-theme] .planner-coverage-note{background:var(--theme-success-soft)}html[data-theme] .planner-coverage-note strong{color:var(--theme-success)}html[data-theme] .chapter-row,html[data-theme] .subject-coverage-note strong,html[data-theme] .student-active-order-note,html[data-theme] .physics-optional-practice>summary,html[data-theme] .physics-source-defects>summary{color:var(--theme-text-secondary)}html[data-theme] .chapter-focus-modes{background:var(--theme-surface-sunken)}html[data-theme] .chapter-focus-modes button{color:var(--theme-text-muted)}html[data-theme] .chapter-focus-modes button.active{background:var(--theme-surface-raised);color:var(--theme-accent-strong);box-shadow:var(--theme-shadow-sm)}html[data-theme] .student-simple-unit-row.current{border-color:var(--theme-accent-border);background:var(--theme-accent-soft)}html[data-theme] .exercise-state-pill{background:var(--theme-surface-sunken);color:var(--theme-text-muted)}html[data-theme] .exercise-state-pill.ready{background:var(--theme-warning-soft);color:var(--theme-warning)}html[data-theme] .exercise-state-pill.complete{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .exercise-question-group{border-color:var(--theme-border);background:var(--theme-surface);box-shadow:var(--theme-shadow-sm)}html[data-theme] .exercise-question{border-color:var(--theme-border);background:var(--theme-surface);color:var(--theme-text)}html[data-theme] .exercise-question:hover{background:var(--theme-surface-soft)}html[data-theme] .exercise-question.complete,html[data-theme] .quest-card.complete,html[data-theme] .exercise-completion-card.committed{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .exercise-question.complete,html[data-theme] .quest-card.complete,html[data-theme] .exercise-completion-card.committed{border-color:color-mix(in srgb, var(--theme-success) 38%, var(--theme-border))}}html[data-theme] .exercise-question.complete,html[data-theme] .quest-card.complete,html[data-theme] .exercise-completion-card.committed{background:var(--theme-success-soft)}html[data-theme] .exercise-question-math,html[data-theme] .exercise-question.complete .exercise-question-math{color:var(--theme-text)}html[data-theme] .exercise-check{border-color:var(--theme-border-strong);background:var(--theme-surface-raised);color:var(--theme-surface-raised)}html[data-theme] .checkpoint-question,html[data-theme] .checkpoint-option{border-color:var(--theme-border);background:var(--theme-surface-raised);color:var(--theme-text)}html[data-theme] .checkpoint-option:hover:not(:disabled){border-color:var(--theme-accent-border);background:var(--theme-accent-soft)}html[data-theme] .checkpoint-option.selected{border-color:var(--theme-accent);background:var(--theme-accent-soft)}html[data-theme] .checkpoint-option.correct,html[data-theme] .checkpoint-explanation.correct,html[data-theme] .checkpoint-result.passed{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .checkpoint-option.correct,html[data-theme] .checkpoint-explanation.correct,html[data-theme] .checkpoint-result.passed{border-color:color-mix(in srgb, var(--theme-success) 45%, var(--theme-border))}}html[data-theme] .checkpoint-option.correct,html[data-theme] .checkpoint-explanation.correct,html[data-theme] .checkpoint-result.passed{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .checkpoint-option.incorrect,html[data-theme] .checkpoint-explanation.incorrect{border-color:var(--theme-danger)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .checkpoint-option.incorrect,html[data-theme] .checkpoint-explanation.incorrect{border-color:color-mix(in srgb, var(--theme-danger) 45%, var(--theme-border))}}html[data-theme] .checkpoint-option.incorrect,html[data-theme] .checkpoint-explanation.incorrect{background:var(--theme-danger-soft);color:var(--theme-danger)}html[data-theme] .checkpoint-result{border-color:var(--theme-border);background:var(--theme-surface-soft)}html[data-theme] .checkpoint-result p:last-child,html[data-theme] .exercise-completion-card p:last-child,html[data-theme] .chapter-readiness-note p:last-child{color:var(--theme-text-muted)}html[data-theme] .exercise-mobile-switcher{border-color:var(--theme-border);background:var(--theme-surface-sunken)}html[data-theme] .exercise-mobile-switcher button{color:var(--theme-text-muted)}html[data-theme] .exercise-mobile-switcher button.active{background:var(--theme-surface-raised);color:var(--theme-text)}html[data-theme] .physics-study-summary>div,html[data-theme] .physics-practice-card,html[data-theme] .physics-exam-targets article{border-color:var(--theme-border);background:var(--theme-surface);color:var(--theme-text)}html[data-theme] .physics-practice-card.complete{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .physics-practice-card.complete{border-color:color-mix(in srgb, var(--theme-success) 38%, var(--theme-border))}}html[data-theme] .physics-practice-card.complete{background:var(--theme-success-soft)}html[data-theme] .physics-example-strip>div span{border-color:var(--theme-border);background:var(--theme-surface-raised);color:var(--theme-text-secondary)}html[data-theme] .physics-exam-targets article span{color:var(--theme-accent-strong)}html[data-theme] .physics-exam-targets article p,html[data-theme] .physics-question-text{color:var(--theme-text-secondary)}html[data-theme] .source-defect-note,html[data-theme] .physics-source-defects>div{border-color:var(--theme-warning)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .source-defect-note,html[data-theme] .physics-source-defects>div{border-color:color-mix(in srgb, var(--theme-warning) 38%, var(--theme-border))}}html[data-theme] .source-defect-note,html[data-theme] .physics-source-defects>div{background:var(--theme-warning-soft);color:var(--theme-warning)}html[data-theme] .physics-source-defects p{color:var(--theme-text-secondary)}html[data-theme] .achievement-card{background:var(--theme-surface);border-color:var(--theme-border)}html[data-theme] .achievement-icon{background:var(--theme-surface-sunken);color:var(--theme-text-muted)}html[data-theme] .achievement-card.unlocked{border-color:var(--theme-warning)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .achievement-card.unlocked{border-color:color-mix(in srgb, var(--theme-warning) 35%, var(--theme-border))}}html[data-theme] .achievement-card.unlocked{background:var(--theme-warning-soft)}html[data-theme] .achievement-card.unlocked .achievement-icon{background:var(--theme-warning)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .achievement-card.unlocked .achievement-icon{background:color-mix(in srgb, var(--theme-warning) 22%, var(--theme-surface))}}html[data-theme] .achievement-card.unlocked .achievement-icon{color:var(--theme-warning)}html[data-theme] .demo-banner{border-color:var(--theme-accent-border);background:var(--theme-accent-soft);color:var(--theme-text-secondary)}html[data-theme] .demo-banner strong{color:var(--theme-accent-strong)}html[data-theme] .rest-card{border-color:var(--theme-accent-border);background:var(--theme-accent-soft)}html[data-theme] .milestone-card{border-color:var(--theme-warning)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .milestone-card{border-color:color-mix(in srgb, var(--theme-warning) 35%, var(--theme-border))}}html[data-theme] .milestone-card{background:var(--theme-warning-soft)}html[data-theme] .milestone-copy p:last-child{color:var(--theme-text-secondary)}html[data-theme] .milestone-count{background:var(--theme-surface-raised);color:var(--theme-warning)}html[data-theme] .study-order-modal-backdrop{background:var(--theme-overlay)}html[data-theme] .study-order-modal{border:1px solid var(--theme-border);background:var(--theme-surface-raised);color:var(--theme-text);box-shadow:var(--theme-shadow-lg)}html[data-theme] .profile-identity-card,html[data-theme] .profile-streak-panel,html[data-theme] .profile-settings-group{border-color:var(--theme-border);background:var(--theme-surface);box-shadow:var(--theme-shadow-md)}html[data-theme] .profile-settings-list,html[data-theme] .theme-segment{border-color:var(--theme-border);background:var(--theme-surface-soft)}html[data-theme] .theme-segment button{color:var(--theme-text-muted)}html[data-theme] .theme-segment button.active{background:var(--theme-surface-raised);color:var(--theme-text);box-shadow:var(--theme-shadow-sm), inset 0 0 0 1px var(--theme-border)}@media (max-width:640px){html[data-theme] .page{background:0 0}html[data-theme] .progress-dimension-card,html[data-theme] .progress-detail-card,html[data-theme] .progress-subject-coverage{box-shadow:var(--theme-shadow-sm)}html[data-theme] .bottom-nav{background:var(--theme-nav)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .bottom-nav{background:color-mix(in srgb, var(--theme-nav) 96%, transparent)}}}@media (prefers-reduced-motion:reduce){html[data-theme] *,html[data-theme] :before,html[data-theme] :after{scroll-behavior:auto!important;transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important}}html[data-theme] :is(.tabbed-study-layout,.exercise-two-pane,.exercise-layout,.study-split-layout,.study-pane,.study-column,.study-stack,.notes-panel,.notes-column,.practice-panel,.practice-column,.learn-panel,.formulas-panel,.question-panel,.question-list-panel,.checkpoint-panel,.topic-panel,.topic-stack,.topic-route-panel,.exercise-panel,.exercise-stack,.inner-surface-panel,.nested-surface-panel,.deep-surface-panel){color:var(--theme-text);background:0 0}html[data-theme] :is(.study-tab-shell,.tab-shell,.segmented-shell,.exercise-switcher,.tabbed-stage,.practice-tabs,.learn-practice-tabs,.nested-tabs,.student-tab-switcher){border:1px solid var(--theme-border);background:var(--theme-surface);box-shadow:var(--theme-shadow-sm)}html[data-theme] :is(.study-tab-shell button,.tab-shell button,.segmented-shell button,.exercise-switcher button,.tabbed-stage button,.practice-tabs button,.learn-practice-tabs button,.nested-tabs button,.student-tab-switcher button){color:var(--theme-text-muted);background:0 0}html[data-theme] :is(.study-tab-shell button.active,.tab-shell button.active,.segmented-shell button.active,.exercise-switcher button.active,.tabbed-stage button.active,.practice-tabs button.active,.learn-practice-tabs button.active,.nested-tabs button.active,.student-tab-switcher button.active){background:var(--theme-surface-raised);color:var(--theme-text);box-shadow:inset 0 0 0 1px var(--theme-border), var(--theme-shadow-sm)}html[data-theme] :is(.notes-card,.formula-card,.help-card,.study-help-card,.practice-info-card,.exercise-info-card,.inner-note-card,.book-example-card,.topic-summary-card,.mini-summary-card,.question-summary-card,.question-bank-card,.route-summary-card,.subtopic-card,.subtopic-summary,.topic-route-card,.learn-card,.checkpoint-summary-card,.checkpoint-status-card){border:1px solid var(--theme-border);background:var(--theme-surface);color:var(--theme-text);box-shadow:var(--theme-shadow-sm)}html[data-theme] :is(.notes-card-header,.formula-card-header,.question-card-header,.exercise-card-header,.practice-card-header,.topic-card-header,.help-card-header,.study-inline-panel,.exercise-inline-panel,.topic-inline-panel,.inner-soft-surface,.notes-section,.formula-section,.book-example-section,.practice-guidance,.route-note,.deep-muted-panel){border-color:var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-secondary)}html[data-theme] :is(.quick-help-panel,.quick-help-card,.notes-and-formulas,.formula-list,.formula-item,.help-list,.help-item,.topic-help-list,.topic-help-item){border-color:var(--theme-border);background:var(--theme-surface);color:var(--theme-text)}html[data-theme] :is(.formula-item,.help-item,.topic-help-item,.notes-index-item,.quick-help-index-item){border:1px solid var(--theme-border);background:var(--theme-surface-soft)}html[data-theme] :is(.formula-item.active,.help-item.active,.topic-help-item.active,.notes-index-item.active,.quick-help-index-item.active){border-color:var(--theme-accent-border);background:var(--theme-accent-soft)}html[data-theme] :is(.question-list-item,.question-row,.practice-question-row,.required-question-row,.all-question-row,.exercise-row,.subquestion-row,.deep-question-card,.topic-row,.nested-row,.practice-row){border:1px solid var(--theme-border);background:var(--theme-surface);color:var(--theme-text);box-shadow:var(--theme-shadow-sm)}html[data-theme] :is(.question-row.current,.practice-question-row.current,.required-question-row.current,.all-question-row.current,.topic-row.current,.nested-row.current,.practice-row.current){border-color:var(--theme-accent-border);background:var(--theme-accent-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] :is(.question-row.current,.practice-question-row.current,.required-question-row.current,.all-question-row.current,.topic-row.current,.nested-row.current,.practice-row.current){background:color-mix(in srgb, var(--theme-accent-soft) 72%, var(--theme-surface))}}html[data-theme] :is(.question-row.complete,.practice-question-row.complete,.required-question-row.complete,.all-question-row.complete,.topic-row.complete,.nested-row.complete,.practice-row.complete){border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] :is(.question-row.complete,.practice-question-row.complete,.required-question-row.complete,.all-question-row.complete,.topic-row.complete,.nested-row.complete,.practice-row.complete){border-color:color-mix(in srgb, var(--theme-success) 34%, var(--theme-border))}}html[data-theme] :is(.question-row.complete,.practice-question-row.complete,.required-question-row.complete,.all-question-row.complete,.topic-row.complete,.nested-row.complete,.practice-row.complete){background:var(--theme-success-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] :is(.question-row.complete,.practice-question-row.complete,.required-question-row.complete,.all-question-row.complete,.topic-row.complete,.nested-row.complete,.practice-row.complete){background:color-mix(in srgb, var(--theme-success-soft) 88%, var(--theme-surface))}}html[data-theme] :is(.inner-pill,.question-pill,.count-pill,.surface-pill,.book-pill,.topic-pill,.route-pill,.formula-pill,.help-pill,.status-pill,.topic-status-pill){border:1px solid var(--theme-border);background:var(--theme-surface-raised);color:var(--theme-text-secondary)}html[data-theme] :is(.status-pill.done,.topic-status-pill.done,.question-pill.done,.surface-pill.done){border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] :is(.status-pill.done,.topic-status-pill.done,.question-pill.done,.surface-pill.done){border-color:color-mix(in srgb, var(--theme-success) 35%, var(--theme-border))}}html[data-theme] :is(.status-pill.done,.topic-status-pill.done,.question-pill.done,.surface-pill.done){background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] :is(.status-pill.locked,.topic-status-pill.locked,.question-pill.locked,.surface-pill.locked){background:var(--theme-surface-soft);color:var(--theme-text-muted)}html[data-theme] :is(.formula-block,.math-help-block,.example-block,.book-example,.equation-block,.definition-block,.concept-block,.worked-example,.reference-block){border:1px solid var(--theme-border);background:var(--theme-surface-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] :is(.formula-block,.math-help-block,.example-block,.book-example,.equation-block,.definition-block,.concept-block,.worked-example,.reference-block){background:color-mix(in srgb, var(--theme-surface-soft) 82%, var(--theme-surface))}}html[data-theme] :is(.formula-block,.math-help-block,.example-block,.book-example,.equation-block,.definition-block,.concept-block,.worked-example,.reference-block){color:var(--theme-text)}html[data-theme] :is(.notes-card p,.formula-card p,.help-card p,.practice-info-card p,.exercise-info-card p,.question-row p,.topic-row p,.deep-question-card p,.book-example-card p,.question-summary-card p){color:var(--theme-text-secondary)}html[data-theme] :is(.notes-card small,.formula-card small,.help-card small,.practice-info-card small,.exercise-info-card small,.question-row small,.topic-row small,.deep-question-card small,.book-example-card small,.question-summary-card small){color:var(--theme-text-muted)}html[data-theme] :is(.notes-card strong,.formula-card strong,.help-card strong,.practice-info-card strong,.exercise-info-card strong,.question-row strong,.topic-row strong,.deep-question-card strong,.book-example-card strong,.question-summary-card strong){color:var(--theme-text)}html[data-theme] :is(.study-scroll-pane,.exercise-scroll-pane,.notes-scroll-pane,.question-scroll-pane,.topic-scroll-pane,.deep-scroll-pane){scrollbar-color:var(--theme-text-muted) transparent}@supports (color:color-mix(in lab, red, red)){html[data-theme] :is(.study-scroll-pane,.exercise-scroll-pane,.notes-scroll-pane,.question-scroll-pane,.topic-scroll-pane,.deep-scroll-pane){scrollbar-color:color-mix(in srgb, var(--theme-text-muted) 45%, transparent) transparent}}html[data-theme] :is(.study-scroll-pane,.exercise-scroll-pane,.notes-scroll-pane,.question-scroll-pane,.topic-scroll-pane,.deep-scroll-pane)::-webkit-scrollbar-thumb{background:var(--theme-text-muted)}@supports (color:color-mix(in lab, red, red)){html[data-theme] :is(.study-scroll-pane,.exercise-scroll-pane,.notes-scroll-pane,.question-scroll-pane,.topic-scroll-pane,.deep-scroll-pane)::-webkit-scrollbar-thumb{background:color-mix(in srgb, var(--theme-text-muted) 42%, transparent)}}html[data-theme] :is(.study-scroll-pane,.exercise-scroll-pane,.notes-scroll-pane,.question-scroll-pane,.topic-scroll-pane,.deep-scroll-pane)::-webkit-scrollbar-thumb{border-radius:999px}html[data-theme] :is(.study-scroll-pane,.exercise-scroll-pane,.notes-scroll-pane,.question-scroll-pane,.topic-scroll-pane,.deep-scroll-pane)::-webkit-scrollbar-track{background:0 0}@media (max-width:900px){html[data-theme] :is(.study-tab-shell,.tab-shell,.segmented-shell,.exercise-switcher,.tabbed-stage,.practice-tabs,.learn-practice-tabs,.nested-tabs,.student-tab-switcher,.notes-card,.formula-card,.help-card,.study-help-card,.practice-info-card,.exercise-info-card,.question-list-item,.question-row,.practice-question-row,.required-question-row,.all-question-row,.exercise-row,.subquestion-row,.deep-question-card,.topic-row,.nested-row,.practice-row){box-shadow:var(--theme-shadow-sm)}}html[data-theme]{--border:var(--theme-border)}.sr-only{clip:rect(0, 0, 0, 0)!important;white-space:nowrap!important;border:0!important;width:1px!important;height:1px!important;margin:-1px!important;padding:0!important;position:absolute!important;overflow:hidden!important}html[data-theme] .exercise-hero{border-color:var(--theme-border);background:linear-gradient(145deg, var(--theme-surface-raised), var(--theme-surface));color:var(--theme-text);box-shadow:var(--theme-shadow-md)}html[data-theme] .exercise-hero p,html[data-theme] .exercise-progress-meta,html[data-theme] .exercise-dual-progress{color:var(--theme-text-muted)}html[data-theme] .exercise-dual-progress strong{color:var(--theme-text)}html[data-theme] .exercise-score{border:1px solid var(--theme-accent-border);background:var(--theme-accent-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .exercise-score{background:color-mix(in srgb, var(--theme-accent-soft) 82%, var(--theme-surface-raised))}}html[data-theme] .exercise-score{color:var(--theme-text);box-shadow:var(--theme-shadow-sm)}html[data-theme] .exercise-score span{color:var(--theme-text-secondary)}html[data-theme] .source-status,html[data-theme] .source-page-pill{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-muted)}html[data-theme] .learning-note{border-color:var(--theme-border);background:var(--theme-surface);color:var(--theme-text);box-shadow:var(--theme-shadow-sm)}html[data-theme] .learning-note>summary{color:var(--theme-text)}html[data-theme] .learning-note summary small{color:var(--theme-text-muted)}html[data-theme] .learning-note-body{color:var(--theme-text-secondary)}html[data-theme] .derived-note{border:1px solid var(--theme-warning)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .derived-note{border:1px solid color-mix(in srgb, var(--theme-warning) 32%, var(--theme-border))}}html[data-theme] .derived-note{background:var(--theme-warning-soft);color:var(--theme-warning)}html[data-theme] .note-list{color:var(--theme-text-secondary)}html[data-theme] .formula-chip{border-color:var(--theme-accent-border);background:var(--theme-accent-soft);color:var(--theme-text)}html[data-theme] .example-ref-list{color:var(--theme-text-muted)}html[data-theme] .example-ref-list strong{color:var(--theme-text-secondary)}html[data-theme] .question-group-copy strong{color:var(--theme-text)}html[data-theme] .question-group-copy small{color:var(--theme-text-muted)}html[data-theme] .group-state{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-muted)}html[data-theme] .group-state.complete{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .group-state.complete{border-color:color-mix(in srgb, var(--theme-success) 34%, var(--theme-border))}}html[data-theme] .group-state.complete{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .unlock-step>span{background:var(--theme-surface-soft);color:var(--theme-text-secondary)}html[data-theme] .unlock-step b{color:var(--theme-text-muted)}html[data-theme] .unlock-step.active>span{background:var(--theme-accent-soft);color:var(--theme-accent-strong)}html[data-theme] .unlock-step.complete>span{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .practice-scope-switcher,html[data-theme] .practice-scope-toggle{border:1px solid var(--theme-border);background:var(--theme-surface-soft)}html[data-theme] .practice-scope-switcher button,html[data-theme] .practice-scope-toggle button{color:var(--theme-text-muted);background:0 0}html[data-theme] .practice-scope-switcher button.active,html[data-theme] .practice-scope-toggle button.active{background:var(--theme-surface-raised);color:var(--theme-accent-strong);box-shadow:var(--theme-shadow-sm), inset 0 0 0 1px var(--theme-border)}html[data-theme] .core-path-policy-note{border-color:var(--theme-accent-border);background:var(--theme-accent-soft);color:var(--theme-text-secondary)}html[data-theme] .core-path-completion-card{border-color:var(--theme-accent-border)}html[data-theme] .student-context-note>summary{color:var(--theme-accent-strong)}html[data-theme] .study-flow-tabs{border:1px solid var(--theme-border);background:var(--theme-surface-soft)}html[data-theme] .study-flow-tabs button{color:var(--theme-text-muted);background:0 0}html[data-theme] .study-flow-tabs button.active{background:var(--theme-surface-raised);color:var(--theme-text);box-shadow:var(--theme-shadow-sm), inset 0 0 0 1px var(--theme-border)}html[data-theme] .physics-topic-tabs button.active,html[data-theme] .math-exercise-tabs button.active,html[data-theme] .math-review-tabs button.active{color:var(--theme-accent-strong)}html[data-theme] .academic-source-context{border-color:var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text)}html[data-theme] .academic-source-heading strong,html[data-theme] .academic-source-exact{color:var(--theme-text)}html[data-theme] .academic-source-heading span{background:var(--theme-warning-soft);color:var(--theme-warning)}html[data-theme] .academic-source-reference{color:var(--theme-text-muted)}html[data-theme] .academic-source-anomaly{color:var(--theme-warning)}html[data-theme] .academic-learning-reference{border-left-color:var(--theme-accent-border);background:var(--theme-accent-soft);color:var(--theme-text-secondary)}html[data-theme] .learning-source-basis{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:12px;overflow:hidden}html[data-theme] .learning-source-basis>summary{color:var(--theme-text-secondary);cursor:pointer;padding:10px 11px;font-size:.72rem;font-weight:800}html[data-theme] .review-guide-source-stack{gap:8px;padding:0 10px 10px;display:grid}html[data-theme] .checkpoint-source-intro,html[data-theme] .checkpoint-derived-copy small{color:var(--theme-text-muted)}html[data-theme] .exam-source-target-section{border-color:var(--theme-border);background:var(--theme-surface)}html[data-theme] .exam-target-source-card{border-color:var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text)}html[data-theme] .exam-target-rationale{color:var(--theme-text-secondary)}html[data-theme] .locked-checkpoint,html[data-theme] .checkpoint-ready-card{border-color:var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text)}html[data-theme] .checkpoint-ready-card{border-color:var(--theme-accent-border);background:var(--theme-accent-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .checkpoint-ready-card{background:color-mix(in srgb, var(--theme-accent-soft) 74%, var(--theme-surface))}}html[data-theme] .checkpoint-lock-pill,html[data-theme] .completion-count-pill{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-muted)}html[data-theme] .checkpoint-best{border:1px solid var(--theme-accent-border);background:var(--theme-accent-soft);color:var(--theme-text)}html[data-theme] .checkpoint-best span{color:var(--theme-text-secondary)}html[data-theme] .checkpoint-provenance{background:var(--theme-surface-soft);color:var(--theme-text-muted)}html[data-theme] .checkpoint-question-title{color:var(--theme-text)}html[data-theme] .checkpoint-edit-hint,html[data-theme] .checkpoint-ready-copy p,html[data-theme] .checkpoint-ready-copy small,html[data-theme] .checkpoint-submit-row>span,html[data-theme] .checkpoint-attempts{color:var(--theme-text-muted)}html[data-theme] .checkpoint-option-key{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-secondary)}html[data-theme] .checkpoint-option.selected:not(.correct):not(.incorrect) .checkpoint-option-key,html[data-theme] .checkpoint-option.selected:not(.correct):not(.incorrect) .checkpoint-selected-mark{background:var(--theme-accent);color:#fff;border-color:var(--theme-accent)}html[data-theme=dark] .checkpoint-option.selected:not(.correct):not(.incorrect) .checkpoint-option-key,html[data-theme=dark] .checkpoint-option.selected:not(.correct):not(.incorrect) .checkpoint-selected-mark{color:#10131a}html[data-theme] .review-exercise-page .checkpoint-option.incorrect{border-color:var(--theme-danger)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .review-exercise-page .checkpoint-option.incorrect{border-color:color-mix(in srgb, var(--theme-danger) 48%, var(--theme-border))}}html[data-theme] .review-exercise-page .checkpoint-option.incorrect{background:var(--theme-danger-soft);color:var(--theme-danger)}html[data-theme] .exercise-completion-card.pending{border-color:var(--theme-border);background:var(--theme-surface-soft)}html[data-theme] .completion-state-icon{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .completion-report span{border-color:var(--theme-border);background:var(--theme-surface-raised);color:var(--theme-text-muted)}html[data-theme] .completion-report span strong{color:var(--theme-text)}html[data-theme] .completion-copy{gap:4px;min-width:0;display:grid}html[data-theme] .completion-copy p{color:var(--theme-text-muted)}html[data-theme] .chapter-example-progress,html[data-theme] .chapter-finish-card,html[data-theme] .chapter-exam-pack-lock,html[data-theme] .chapter-reference-examples{border-color:var(--theme-border);background:var(--theme-surface);color:var(--theme-text);box-shadow:var(--theme-shadow-sm)}html[data-theme] .chapter-example-progress p:last-child,html[data-theme] .chapter-finish-card p:last-child,html[data-theme] .chapter-exam-pack-lock p{color:var(--theme-text-muted)}html[data-theme] .chapter-example-card,html[data-theme] .core-example-card{border:1px solid var(--theme-border);background:var(--theme-surface);min-width:0;color:var(--theme-text);box-shadow:var(--theme-shadow-sm);border-radius:17px;gap:12px;padding:15px;display:grid}html[data-theme] .chapter-example-card.reviewed,html[data-theme] .core-example-card.reviewed{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .chapter-example-card.reviewed,html[data-theme] .core-example-card.reviewed{border-color:color-mix(in srgb, var(--theme-success) 38%, var(--theme-border))}}html[data-theme] .chapter-example-card.reviewed,html[data-theme] .core-example-card.reviewed{background:var(--theme-success-soft)}html[data-theme] .chapter-example-source{background:var(--theme-surface-soft);color:var(--theme-text-secondary)}html[data-theme] .chapter-example-source>strong,html[data-theme] .chapter-example-skill{color:var(--theme-text-secondary)}html[data-theme] .chapter-example-provenance{color:var(--theme-text-muted)}html[data-theme] .chapter-finish-card.ready,html[data-theme] .chapter-exam-pack-lock.published{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .chapter-finish-card.ready,html[data-theme] .chapter-exam-pack-lock.published{border-color:color-mix(in srgb, var(--theme-success) 40%, var(--theme-border))}}html[data-theme] .chapter-finish-card.ready,html[data-theme] .chapter-exam-pack-lock.published{background:var(--theme-success-soft)}html[data-theme] .chapter-readiness-grid span{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-muted)}html[data-theme] .chapter-readiness-grid strong{color:var(--theme-text)}html[data-theme] .chapter-reference-card,html[data-theme] .reference-example{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text);border-radius:14px;gap:8px;padding:13px;display:grid}html[data-theme] .exam-pack-hero,html[data-theme] .exam-pack-warning,html[data-theme] .exam-pack-section,html[data-theme] .exam-reference-card,html[data-theme] .exam-evidence-register,html[data-theme] .exam-pack-finish-card{border-color:var(--theme-border);background:var(--theme-surface);color:var(--theme-text)}html[data-theme] .exam-pack-warning,html[data-theme] .compact-exam-warning{border:1px solid var(--theme-warning)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .exam-pack-warning,html[data-theme] .compact-exam-warning{border:1px solid color-mix(in srgb, var(--theme-warning) 35%, var(--theme-border))}}html[data-theme] .exam-pack-warning,html[data-theme] .compact-exam-warning{background:var(--theme-warning-soft);color:var(--theme-warning)}html[data-theme] .exam-pack-warning strong,html[data-theme] .compact-exam-warning strong{color:var(--theme-warning)}html[data-theme] .exam-pack-warning p,html[data-theme] .compact-exam-warning p{color:var(--theme-text-secondary)}html[data-theme] .exam-priority-card{border-color:var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text)}html[data-theme] .exam-priority-card.must-know{border-color:var(--theme-accent-border);background:var(--theme-accent-soft)}html[data-theme] .exam-evidence-badge,html[data-theme] .exam-priority-pill.high-yield{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .exam-priority-pill{background:var(--theme-accent-soft);color:var(--theme-accent-strong)}html[data-theme] .exam-match-pill{background:var(--theme-surface-raised);color:var(--theme-text-muted)}html[data-theme] .exam-task-prompt,html[data-theme] .exam-reference-card ul{color:var(--theme-text-secondary)}html[data-theme] .exam-source-question,html[data-theme] .exam-evidence-source-list>div{background:var(--theme-surface-raised);color:var(--theme-text)}html[data-theme] .exam-option-grid>div{border-color:var(--theme-border);background:var(--theme-surface)}html[data-theme] .exam-option-grid strong{background:var(--theme-surface-soft);color:var(--theme-text-secondary)}html[data-theme] .exam-evidence-row{border-top-color:var(--theme-border)}html[data-theme] .exam-evidence-row p{color:var(--theme-text-muted)}html[data-theme] .exam-source-link{color:var(--theme-accent-strong)}html[data-theme] .compact-selection-details{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-secondary);border-radius:14px;overflow:hidden}html[data-theme] .compact-selection-details>summary{color:var(--theme-accent-strong);cursor:pointer;padding:11px 13px;font-weight:800}html[data-theme] .compact-selection-details>div,html[data-theme] .compact-selection-details>p{padding-inline:13px}html[data-theme] .review-source-note{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-muted)}html[data-theme] .textbook-review-mcq.correct-review-mcq{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .textbook-review-mcq.correct-review-mcq{border-color:color-mix(in srgb, var(--theme-success) 38%, var(--theme-border))}}html[data-theme] .chapter-reference-examples,html[data-theme] .chapter-reference-card,html[data-theme] .math-exercise-page,html[data-theme] .math-exam-pack-page{color:var(--theme-text)}html[data-theme] .exercise-progress-badge{border:1px solid var(--theme-accent-border);background:var(--theme-accent-soft);min-width:76px;color:var(--theme-text);box-shadow:var(--theme-shadow-sm);border-radius:18px;justify-items:center;gap:2px;padding:12px 14px;display:grid}html[data-theme] .exercise-progress-badge strong{font-size:1.05rem;line-height:1}html[data-theme] .exercise-progress-badge span{color:var(--theme-text-muted);font-size:.66rem;font-weight:800}html[data-theme] .exercise-practice-panel{border:1px solid var(--theme-border);background:var(--theme-surface);min-width:0;color:var(--theme-text);box-shadow:var(--theme-shadow-sm);border-radius:18px;gap:14px;padding:16px;display:grid}html[data-theme] .exercise-practice-toolbar{justify-content:space-between;align-items:flex-start;gap:14px;display:flex}html[data-theme] .question-set-list,html[data-theme] .question-leaf-list{gap:10px;min-width:0;display:grid}html[data-theme] .question-set-card{border:1px solid var(--theme-border);background:var(--theme-surface-soft);min-width:0;color:var(--theme-text);border-radius:15px;gap:10px;padding:13px;display:grid}html[data-theme] .question-set-stem{color:var(--theme-text-secondary)}html[data-theme] .question-leaf{border:1px solid var(--theme-border);background:var(--theme-surface-raised);min-width:0;color:var(--theme-text);cursor:pointer;border-radius:13px;grid-template-columns:auto 34px minmax(0,1fr);align-items:start;gap:10px;padding:11px 12px;display:grid}html[data-theme] .question-leaf:hover{border-color:var(--theme-accent-border);background:var(--theme-accent-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .question-leaf:hover{background:color-mix(in srgb, var(--theme-accent-soft) 45%, var(--theme-surface-raised))}}html[data-theme] .question-leaf.complete{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .question-leaf.complete{border-color:color-mix(in srgb, var(--theme-success) 36%, var(--theme-border))}}html[data-theme] .question-leaf.complete{background:var(--theme-success-soft)}html[data-theme] .question-leaf input{accent-color:var(--theme-accent);margin-top:5px}html[data-theme] .question-leaf-ref{background:var(--theme-accent-soft);min-width:30px;min-height:30px;color:var(--theme-accent-strong);border-radius:9px;place-items:center;padding:4px 6px;font-size:.68rem;font-weight:900;display:grid}html[data-theme] .learning-section{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text);border-radius:13px;gap:6px;margin-top:10px;padding:12px;display:grid}html[data-theme] .learning-section p{color:var(--theme-text-secondary)}html[data-theme] .formula-card{border:1px solid var(--theme-accent-border);background:var(--theme-accent-soft);color:var(--theme-text);border-radius:12px;padding:10px 11px}html[data-theme] .core-example-card .secondary-button{align-self:end}html[data-theme] .reference-example{overflow-wrap:anywhere}html[data-theme] .student-step-badge,html[data-theme] .physics-topic-route-button>span,html[data-theme] .physics-topic-check-heading>span{border:1px solid var(--theme-accent-border);background:var(--theme-accent-soft);color:var(--theme-accent-strong)}html[data-theme] .stage-count{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-muted)}html[data-theme] .stage-count.complete,html[data-theme] .physics-topic-route-button.complete>span{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .stage-count.complete,html[data-theme] .physics-topic-route-button.complete>span{border-color:color-mix(in srgb, var(--theme-success) 34%, var(--theme-border))}}html[data-theme] .stage-count.complete,html[data-theme] .physics-topic-route-button.complete>span{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .physics-topic-loop-hero{border-color:var(--theme-border);background:linear-gradient(145deg, var(--theme-surface-raised), var(--theme-surface));color:var(--theme-text)}html[data-theme] .physics-learning-step{border-color:var(--theme-border);background:var(--theme-surface-raised);color:var(--theme-text)}html[data-theme] .physics-learning-step strong{color:var(--theme-text)}html[data-theme] .physics-learning-step small{color:var(--theme-text-muted)}html[data-theme] .physics-learning-step.current,html[data-theme] .physics-topic-route-button.current{border-color:var(--theme-accent-border);background:var(--theme-accent-soft);box-shadow:0 0 0 2px var(--theme-accent)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .physics-learning-step.current,html[data-theme] .physics-topic-route-button.current{box-shadow:0 0 0 2px color-mix(in srgb, var(--theme-accent) 14%, transparent)}}html[data-theme] .physics-learning-step.complete{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .physics-learning-step.complete{border-color:color-mix(in srgb, var(--theme-success) 38%, var(--theme-border))}}html[data-theme] .physics-learning-step.complete{background:var(--theme-success-soft)}html[data-theme] .physics-major-topic-card{border-color:var(--theme-border);background:var(--theme-surface);color:var(--theme-text);box-shadow:var(--theme-shadow-md)}html[data-theme] .physics-topic-panel>section{border-color:var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text)}html[data-theme] .physics-subtopic-section li{color:var(--theme-text-secondary)}html[data-theme] .physics-subtopic-note{color:var(--theme-text-muted)}html[data-theme] .physics-topic-formulas article,html[data-theme] .physics-worked-example-list>div,html[data-theme] .physics-topic-practice-item{border:1px solid var(--theme-border);background:var(--theme-surface-raised);color:var(--theme-text);box-shadow:var(--theme-shadow-sm)}html[data-theme] .physics-topic-formulas article small,html[data-theme] .physics-worked-example-list span,html[data-theme] .physics-topic-practice-item .row-between span{color:var(--theme-text-muted)}html[data-theme] .physics-topic-practice-item p{color:var(--theme-text-secondary)}html[data-theme] .physics-major-topic-commit{border-color:var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text)}html[data-theme] .physics-major-topic-commit span{color:var(--theme-text-muted)}html[data-theme] .physics-topic-check{border-color:var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text)}html[data-theme] .physics-topic-check p{color:var(--theme-text-muted)}html[data-theme] .physics-topic-check.locked{background:var(--theme-surface-sunken)}html[data-theme] .physics-topic-check.ready{border-color:var(--theme-accent-border);background:var(--theme-accent-soft)}html[data-theme] .physics-topic-check.passed,html[data-theme] .physics-finish-stage{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .physics-topic-check.passed,html[data-theme] .physics-finish-stage{border-color:color-mix(in srgb, var(--theme-success) 38%, var(--theme-border))}}html[data-theme] .physics-topic-check.passed,html[data-theme] .physics-finish-stage{background:var(--theme-success-soft);color:var(--theme-text)}html[data-theme] .physics-topic-practice-panel{color:var(--theme-text)}html[data-theme] .physics-optional-practice .physics-topic-practice-item,html[data-theme] .physics-extra-practice-list .physics-topic-practice-item{background:var(--theme-surface-raised)}html[data-theme] .verified-unit-card,html[data-theme] .future-subject-card,html[data-theme] .student-advanced-progress-note{border-color:var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text)}html[data-theme] .student-chapter-choice-list button,html[data-theme] .study-order-modal-explainer>div{border-color:var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-secondary)}html[data-theme] .student-chapter-choice-list button:hover:not(:disabled){border-color:var(--theme-accent-border);background:var(--theme-accent-soft)}html[data-theme] .study-order-modal-title{color:var(--theme-text);margin:0}html[data-theme] .mathematics-student-subject,html[data-theme] .physics-student-subject,html[data-theme] .policy-bound-unit-card{color:inherit}@media (max-width:767px){html[data-theme] .exercise-practice-toolbar{flex-direction:column;align-items:stretch}html[data-theme] .practice-scope-toggle{width:100%}html[data-theme] .practice-scope-toggle button{flex:1}html[data-theme] .question-leaf{grid-template-columns:auto 30px minmax(0,1fr);padding:10px}html[data-theme] .exercise-progress-badge{min-width:66px;padding:10px}}@media (min-width:900px){html[data-theme] .remaining-math-exercise .math-study-desktop-grid{grid-template-columns:minmax(0,1.55fr) minmax(280px,.75fr);align-items:start;gap:18px;display:grid}}html[data-theme] .achievements-page{--achievement-common:var(--theme-accent);--achievement-rare:var(--theme-success);--achievement-epic:#8b5cf6;--achievement-mastery:var(--theme-warning)}html[data-theme=dark] .achievements-page{--achievement-epic:#c3a6ff}html[data-theme] .achievement-engine-loading,html[data-theme] .achievement-summary-card,html[data-theme] .achievement-trust-note{border:1px solid var(--theme-border);background:var(--theme-surface);color:var(--theme-text);box-shadow:var(--theme-shadow-sm)}html[data-theme] .achievement-engine-loading,html[data-theme] .achievement-trust-note{border-radius:18px;align-items:flex-start;gap:12px;padding:16px;display:flex}html[data-theme] .achievement-engine-loading .app-icon,html[data-theme] .achievement-trust-note .app-icon{width:22px;height:22px;color:var(--theme-accent-strong)}html[data-theme] .achievement-engine-loading p,html[data-theme] .achievement-trust-note p{color:var(--theme-text-muted);margin:3px 0 0;font-size:.77rem;line-height:1.5}html[data-theme] .achievement-summary-card{border-radius:22px;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:18px;margin-bottom:14px;padding:18px;display:grid}html[data-theme] .achievement-summary-ring{background:conic-gradient(var(--theme-accent) var(--achievement-progress), var(--theme-progress-track) 0deg);width:104px;height:104px;box-shadow:inset 0 0 0 1px var(--theme-border);border-radius:999px;place-items:center;display:grid}html[data-theme] .achievement-summary-ring:before{content:"";position:absolute}html[data-theme] .achievement-summary-ring>div{background:var(--theme-surface-raised);width:78px;height:78px;box-shadow:inset 0 0 0 1px var(--theme-border);border-radius:999px;place-items:center;display:grid}html[data-theme] .achievement-summary-ring strong{font-size:1.35rem;line-height:1}html[data-theme] .achievement-summary-ring span{color:var(--theme-text-muted);margin-top:3px;font-size:.67rem;font-weight:800}html[data-theme] .achievement-summary-copy{min-width:0}html[data-theme] .achievement-summary-copy h2{margin:3px 0 6px;font-size:1.08rem}html[data-theme] .achievement-summary-copy>p:not(.eyebrow){color:var(--theme-text-muted);margin:0 0 12px;font-size:.77rem;line-height:1.5}html[data-theme] .achievement-category-strip{grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin-bottom:14px;display:grid}html[data-theme] .achievement-category-strip>div{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:13px;gap:4px;padding:10px;display:grid}html[data-theme] .achievement-category-strip span{color:var(--theme-text-muted);text-transform:uppercase;letter-spacing:.04em;font-size:.64rem;font-weight:800}html[data-theme] .achievement-category-strip strong{color:var(--theme-text);font-size:.82rem}html[data-theme] .achievement-real-grid{grid-template-columns:repeat(2,minmax(0,1fr))}html[data-theme] .achievement-real-card{min-width:0;position:relative;overflow:hidden}html[data-theme] .achievement-real-card.locked{border-color:var(--theme-border);background:var(--theme-surface)}html[data-theme] .achievement-real-card.locked .achievement-icon{background:var(--theme-surface-soft);color:var(--theme-text-muted)}html[data-theme] .achievement-real-card.unlocked{border-color:var(--achievement-mastery)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .achievement-real-card.unlocked{border-color:color-mix(in srgb, var(--achievement-mastery) 28%, var(--theme-border))}}html[data-theme] .achievement-real-card.unlocked{background:var(--theme-warning-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .achievement-real-card.unlocked{background:color-mix(in srgb, var(--theme-warning-soft) 36%, var(--theme-surface))}}html[data-theme] .achievement-card-copy{min-width:0}html[data-theme] .achievement-title-row{align-items:flex-start;gap:8px}html[data-theme] .achievement-title-row h2{margin-top:3px}html[data-theme] .achievement-rarity{color:var(--theme-text-muted);text-transform:uppercase;letter-spacing:.06em;font-size:.58rem;font-weight:900;display:inline-flex}html[data-theme] .achievement-rarity.rarity-common{color:var(--achievement-common)}html[data-theme] .achievement-rarity.rarity-rare{color:var(--achievement-rare)}html[data-theme] .achievement-rarity.rarity-epic{color:var(--achievement-epic)}html[data-theme] .achievement-rarity.rarity-mastery{color:var(--achievement-mastery)}html[data-theme] .achievement-lock-state{color:var(--theme-text-muted);font-size:.63rem;font-weight:850}html[data-theme] .achievement-unlocked-badge{flex:none}html[data-theme] .achievement-requirement-row{color:var(--theme-text-muted);justify-content:space-between;gap:10px;margin:1px 0 7px;font-size:.66rem;font-weight:750;display:flex}html[data-theme] .achievement-requirement-row strong{color:var(--theme-text-secondary);flex:none}html[data-theme] .achievement-trust-note{margin-top:14px}@media (max-width:767px){html[data-theme] .achievement-summary-card{text-align:center;grid-template-columns:1fr;justify-items:center}html[data-theme] .achievement-summary-copy{width:100%}html[data-theme] .achievement-category-strip{grid-template-columns:repeat(2,minmax(0,1fr))}html[data-theme] .achievement-real-grid{grid-template-columns:1fr}}html[data-theme] .awards-game-page{--medal-common-a:#6d7df8;--medal-common-b:#9aa2ff;--medal-rare-a:#1f9a73;--medal-rare-b:#63d6ac;--medal-epic-a:#7650d7;--medal-epic-b:#bda6ff;--medal-mastery-a:#b77516;--medal-mastery-b:#f1c66d;--medal-shadow:#19233e38}html[data-theme=dark] .awards-game-page{--medal-shadow:#0000006b}html[data-theme] .awards-header{position:relative}html[data-theme] .awards-command-deck{grid-template-columns:minmax(0,1.2fr) minmax(300px,.8fr);gap:14px;margin-bottom:14px;display:grid}html[data-theme] .awards-rank-panel,html[data-theme] .awards-feature-panel{border:1px solid var(--theme-border);background:radial-gradient(circle at 15% 12%, var(--theme-accent-soft), transparent 42%), linear-gradient(145deg, var(--theme-surface-raised), var(--theme-surface));border-radius:24px}@supports (color:color-mix(in lab, red, red)){html[data-theme] .awards-rank-panel,html[data-theme] .awards-feature-panel{background:radial-gradient(circle at 15% 12%, color-mix(in srgb, var(--theme-accent-soft) 82%, transparent), transparent 42%), linear-gradient(145deg, var(--theme-surface-raised), var(--theme-surface))}}html[data-theme] .awards-rank-panel,html[data-theme] .awards-feature-panel{color:var(--theme-text);box-shadow:var(--theme-shadow-md)}html[data-theme] .awards-rank-panel{grid-template-columns:auto minmax(0,1fr);align-items:center;gap:18px;padding:20px;display:grid}html[data-theme] .awards-rank-ring{width:118px;height:118px;box-shadow:inset 0 0 0 1px var(--theme-border), 0 18px 38px var(--theme-accent)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .awards-rank-ring{box-shadow:inset 0 0 0 1px var(--theme-border), 0 18px 38px color-mix(in srgb, var(--theme-accent) 13%, transparent)}}html[data-theme] .awards-rank-ring>div{width:88px;height:88px}html[data-theme] .awards-rank-copy h2{letter-spacing:-.025em;margin:3px 0;font-size:clamp(1.3rem,2.2vw,1.8rem)}html[data-theme] .awards-rank-copy>p:not(.eyebrow){color:var(--theme-text-muted);margin:0 0 12px;font-size:.78rem}html[data-theme] .awards-feature-panel{align-content:center;gap:12px;padding:17px;display:grid;overflow:hidden}html[data-theme] .awards-feature-label{color:var(--theme-accent-strong);letter-spacing:.06em;text-transform:uppercase;align-items:center;gap:7px;font-size:.65rem;font-weight:900;display:flex}html[data-theme] .awards-feature-label .app-icon{width:16px;height:16px}html[data-theme] .awards-feature-body{grid-template-columns:102px minmax(0,1fr);align-items:center;gap:15px;min-width:0;display:grid}html[data-theme] .awards-feature-body h3{color:var(--theme-text);margin:4px 0;font-size:1rem}html[data-theme] .awards-feature-body p{color:var(--theme-text-muted);margin:0 0 9px;font-size:.72rem;line-height:1.45}html[data-theme] .awards-feature-progress{color:var(--theme-text-secondary);justify-content:space-between;gap:10px;margin-bottom:5px;font-size:.67rem;display:flex}html[data-theme] .awards-feature-progress span{color:var(--theme-text-muted)}html[data-theme] .awards-filter-bar{scrollbar-width:none;gap:7px;margin:3px 0 14px;padding:2px 1px 5px;display:flex;overflow-x:auto}html[data-theme] .awards-filter-bar::-webkit-scrollbar{display:none}html[data-theme] .awards-filter-bar button{border:1px solid var(--theme-border);background:var(--theme-surface-soft);min-height:36px;color:var(--theme-text-muted);font:inherit;cursor:pointer;border-radius:999px;flex:none;padding:8px 12px;font-size:.7rem;font-weight:850}html[data-theme] .awards-filter-bar button:hover{color:var(--theme-text);background:var(--theme-surface-raised)}html[data-theme] .awards-filter-bar button.active{border-color:var(--theme-accent-border);background:var(--theme-accent-soft);color:var(--theme-accent-strong);box-shadow:inset 0 0 0 1px var(--theme-accent)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .awards-filter-bar button.active{box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--theme-accent) 18%, transparent)}}html[data-theme] .awards-trophy-grid{gap:12px}html[data-theme] .awards-trophy-card{min-height:150px;transform-style:preserve-3d;border-radius:21px;grid-template-columns:104px minmax(0,1fr);align-items:center;gap:14px;padding:15px;transition:transform .22s,border-color .22s,box-shadow .22s;display:grid}@media (hover:hover) and (pointer:fine){html[data-theme] .awards-trophy-card:hover{box-shadow:var(--theme-shadow-md);transform:translateY(-2px)}}html[data-theme] .awards-trophy-card.locked{background:radial-gradient(circle at 12% 15%, var(--theme-text-muted), transparent 40%), var(--theme-surface)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .awards-trophy-card.locked{background:radial-gradient(circle at 12% 15%, color-mix(in srgb, var(--theme-text-muted) 6%, transparent), transparent 40%), var(--theme-surface)}}html[data-theme] .awards-trophy-card.unlocked{background:radial-gradient(circle at 11% 14%, var(--medal-mastery-b), transparent 42%), linear-gradient(145deg, var(--theme-surface-raised), var(--theme-surface))}@supports (color:color-mix(in lab, red, red)){html[data-theme] .awards-trophy-card.unlocked{background:radial-gradient(circle at 11% 14%, color-mix(in srgb, var(--medal-mastery-b) 13%, transparent), transparent 42%), linear-gradient(145deg, var(--theme-surface-raised), var(--theme-surface))}}html[data-theme] .achievement-medal{--medal-a:var(--medal-common-a);--medal-b:var(--medal-common-b);perspective:500px;width:92px;height:92px;filter:drop-shadow(0 14px 14px var(--medal-shadow));place-items:center;margin:auto;display:grid;position:relative}html[data-theme] .achievement-medal.rarity-common{--medal-a:var(--medal-common-a);--medal-b:var(--medal-common-b)}html[data-theme] .achievement-medal.rarity-rare{--medal-a:var(--medal-rare-a);--medal-b:var(--medal-rare-b)}html[data-theme] .achievement-medal.rarity-epic{--medal-a:var(--medal-epic-a);--medal-b:var(--medal-epic-b)}html[data-theme] .achievement-medal.rarity-mastery{--medal-a:var(--medal-mastery-a);--medal-b:var(--medal-mastery-b)}html[data-theme] .achievement-medal-rim{z-index:3;background:radial-gradient(circle at 35% 28%, #ffffffb3, transparent 17%), linear-gradient(145deg, var(--medal-b), var(--medal-a) 58%, var(--medal-a));border-radius:50%;place-items:center;width:72px;height:72px;display:grid;position:relative}@supports (color:color-mix(in lab, red, red)){html[data-theme] .achievement-medal-rim{background:radial-gradient(circle at 35% 28%, #ffffffb3, transparent 17%), linear-gradient(145deg, var(--medal-b), var(--medal-a) 58%, color-mix(in srgb, var(--medal-a) 70%, #10131a))}}html[data-theme] .achievement-medal-rim{box-shadow:inset 0 0 0 3px #ffffff5c, inset 0 -9px 16px #00000026, 0 9px 16px var(--medal-shadow)}html[data-theme] .achievement-medal-rim:before{content:"";border:1px solid #ffffff75;border-radius:50%;position:absolute;inset:7px;box-shadow:inset 0 0 12px #ffffff2e}html[data-theme] .achievement-medal-face{z-index:2;background:var(--theme-surface-raised);border-radius:50%;place-items:center;width:46px;height:46px;display:grid;position:relative}@supports (color:color-mix(in lab, red, red)){html[data-theme] .achievement-medal-face{background:color-mix(in srgb, var(--theme-surface-raised) 82%, transparent)}}html[data-theme] .achievement-medal-face{color:var(--medal-a)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .achievement-medal-face{color:color-mix(in srgb, var(--medal-a) 76%, var(--theme-text))}}html[data-theme] .achievement-medal-face{-webkit-backdrop-filter:blur(7px);backdrop-filter:blur(7px);box-shadow:inset 0 0 0 1px #ffffff42}html[data-theme] .achievement-medal-face .app-icon{stroke-width:2px;width:24px;height:24px}html[data-theme] .achievement-medal-orbit{z-index:1;border:1px solid var(--medal-b);width:87px;height:38px;position:absolute}@supports (color:color-mix(in lab, red, red)){html[data-theme] .achievement-medal-orbit{border:1px solid color-mix(in srgb, var(--medal-b) 45%, transparent)}}html[data-theme] .achievement-medal-orbit{opacity:.58;border-radius:50%}html[data-theme] .achievement-medal-orbit.orbit-a{transform:rotate(21deg)}html[data-theme] .achievement-medal-orbit.orbit-b{transform:rotate(-52deg)}html[data-theme] .achievement-medal-glint{z-index:4;width:7px;height:7px;box-shadow:0 0 12px var(--medal-b);background:#ffffffe0;border-radius:50%;position:absolute;top:16px;right:15px}@supports (color:color-mix(in lab, red, red)){html[data-theme] .achievement-medal-glint{box-shadow:0 0 12px color-mix(in srgb, var(--medal-b) 74%, white)}}html[data-theme] .achievement-medal.is-locked{filter:grayscale(.82)saturate(.35)opacity(.58)}html[data-theme] .achievement-medal.is-locked .achievement-medal-orbit,html[data-theme] .achievement-medal.is-locked .achievement-medal-glint{opacity:.16}html[data-theme] .achievement-medal.is-featured{width:102px;height:102px}html[data-theme] .achievement-medal.is-featured .achievement-medal-rim{width:80px;height:80px}html[data-theme] .achievement-medal.is-featured .achievement-medal-face{width:50px;height:50px}html[data-theme] .awards-trophy-copy>p{min-height:2.2em}html[data-theme] .awards-trust-note{background:linear-gradient(145deg, var(--theme-success-soft), var(--theme-surface))}@supports (color:color-mix(in lab, red, red)){html[data-theme] .awards-trust-note{background:linear-gradient(145deg, color-mix(in srgb, var(--theme-success-soft) 52%, var(--theme-surface)), var(--theme-surface))}}@media (max-width:900px){html[data-theme] .awards-command-deck{grid-template-columns:1fr}html[data-theme] .awards-feature-body{grid-template-columns:92px minmax(0,1fr)}}@media (max-width:640px){html[data-theme] .awards-rank-panel{text-align:center;grid-template-columns:1fr;justify-items:center}html[data-theme] .awards-rank-copy{width:100%}html[data-theme] .awards-feature-body{grid-template-columns:78px minmax(0,1fr)}html[data-theme] .achievement-medal.is-featured{width:78px;height:78px}html[data-theme] .achievement-medal.is-featured .achievement-medal-rim{width:62px;height:62px}html[data-theme] .achievement-medal.is-featured .achievement-medal-face{width:40px;height:40px}html[data-theme] .achievement-medal.is-featured .achievement-medal-orbit{width:72px;height:31px}html[data-theme] .awards-trophy-card{grid-template-columns:78px minmax(0,1fr);min-height:132px;padding:13px}html[data-theme] .achievement-medal{width:72px;height:72px}html[data-theme] .achievement-medal-rim{width:58px;height:58px}html[data-theme] .achievement-medal-face{width:38px;height:38px}html[data-theme] .achievement-medal-face .app-icon{width:20px;height:20px}html[data-theme] .achievement-medal-orbit{width:68px;height:29px}html[data-theme] .achievement-medal-glint{top:10px;right:10px}}@media (prefers-reduced-motion:reduce){html[data-theme] .awards-trophy-card{transition:none}}html[data-theme] .reward-unlock-overlay{--reward-a:var(--theme-accent);--reward-b:var(--theme-accent-strong);--reward-soft:var(--theme-accent-soft);z-index:5000;isolation:isolate;place-items:center;padding:clamp(16px,4vw,34px);display:grid;position:fixed;inset:0}html[data-theme] .reward-unlock-overlay.reward-tone-physics{--reward-a:#1f9d84;--reward-b:#58d8b5;--reward-soft:var(--theme-success-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .reward-unlock-overlay.reward-tone-physics{--reward-soft:color-mix(in srgb, var(--theme-success-soft) 78%, var(--theme-surface))}}html[data-theme] .reward-unlock-overlay.reward-tone-common{--reward-a:#6879ef;--reward-b:#a7afff}html[data-theme] .reward-unlock-overlay.reward-tone-rare{--reward-a:#168f6c;--reward-b:#65d8ac;--reward-soft:var(--theme-success-soft)}html[data-theme] .reward-unlock-overlay.reward-tone-epic{--reward-a:#7751db;--reward-b:#c1a8ff;--reward-soft:#8b5cf6}@supports (color:color-mix(in lab, red, red)){html[data-theme] .reward-unlock-overlay.reward-tone-epic{--reward-soft:color-mix(in srgb, #8b5cf6 12%, var(--theme-surface))}}html[data-theme] .reward-unlock-overlay.reward-tone-mastery{--reward-a:#b97917;--reward-b:#f2c96f;--reward-soft:var(--theme-warning-soft)}html[data-theme] .reward-unlock-backdrop{z-index:-2;background:radial-gradient(circle at 50% 43%, var(--reward-a), transparent 33%), var(--theme-overlay);border:0;width:100%;height:100%;position:absolute;inset:0}@supports (color:color-mix(in lab, red, red)){html[data-theme] .reward-unlock-backdrop{background:radial-gradient(circle at 50% 43%, color-mix(in srgb, var(--reward-a) 18%, transparent), transparent 33%), color-mix(in srgb, var(--theme-overlay) 88%, transparent)}}html[data-theme] .reward-unlock-backdrop{-webkit-backdrop-filter:blur(18px)saturate(125%);backdrop-filter:blur(18px)saturate(125%);cursor:default;animation:.24s ease-out both reward-backdrop-in}html[data-theme] .reward-unlock-stage{perspective:900px;justify-items:center;width:min(440px,100%);display:grid;position:relative}html[data-theme] .reward-unlock-orbit-scene{z-index:3;width:190px;height:190px;transform-style:preserve-3d;margin-bottom:-45px;animation:.78s cubic-bezier(.2,.82,.25,1) both reward-scene-arrive;position:relative}html[data-theme] .reward-orbit,html[data-theme] .reward-orbit-halo{transform-style:preserve-3d;border-radius:50%;position:absolute;inset:50%}html[data-theme] .reward-orbit{border:1.5px solid var(--reward-b);width:150px;height:58px;margin:-29px 0 0 -75px}@supports (color:color-mix(in lab, red, red)){html[data-theme] .reward-orbit{border:1.5px solid color-mix(in srgb, var(--reward-b) 62%, transparent)}}html[data-theme] .reward-orbit{box-shadow:0 0 18px var(--reward-a), inset 0 0 14px var(--reward-b)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .reward-orbit{box-shadow:0 0 18px color-mix(in srgb, var(--reward-a) 22%, transparent), inset 0 0 14px color-mix(in srgb, var(--reward-b) 14%, transparent)}}html[data-theme] .reward-orbit-a{animation:1.55s cubic-bezier(.3,.75,.25,1) both reward-orbit-a}html[data-theme] .reward-orbit-b{animation:1.65s cubic-bezier(.3,.75,.25,1) both reward-orbit-b}html[data-theme] .reward-orbit-c{border-color:var(--reward-b);width:132px;height:132px;margin:-66px 0 0 -66px}@supports (color:color-mix(in lab, red, red)){html[data-theme] .reward-orbit-c{border-color:color-mix(in srgb, var(--reward-b) 32%, transparent)}}html[data-theme] .reward-orbit-c{animation:1.7s cubic-bezier(.3,.75,.25,1) both reward-orbit-c}html[data-theme] .reward-orbit-halo{background:radial-gradient(circle, var(--reward-a), transparent 67%);width:112px;height:112px;margin:-56px 0 0 -56px}@supports (color:color-mix(in lab, red, red)){html[data-theme] .reward-orbit-halo{background:radial-gradient(circle, color-mix(in srgb, var(--reward-a) 23%, transparent), transparent 67%)}}html[data-theme] .reward-orbit-halo{filter:blur(5px);animation:1.45s ease-out both reward-halo}html[data-theme] .reward-unlock-core{z-index:5;background:radial-gradient(circle at 34% 26%, #ffffffb8, transparent 16%), linear-gradient(145deg, var(--reward-b), var(--reward-a));width:78px;height:78px;box-shadow:inset 0 0 0 2px #ffffff59, inset 0 -12px 18px #00000029, 0 0 0 10px var(--reward-a), 0 20px 48px var(--reward-a);border-radius:50%;place-items:center;margin:-39px 0 0 -39px;display:grid;position:absolute;inset:50%}@supports (color:color-mix(in lab, red, red)){html[data-theme] .reward-unlock-core{box-shadow:inset 0 0 0 2px #ffffff59, inset 0 -12px 18px #00000029, 0 0 0 10px color-mix(in srgb, var(--reward-a) 8%, transparent), 0 20px 48px color-mix(in srgb, var(--reward-a) 28%, transparent)}}html[data-theme] .reward-unlock-core{transform-style:preserve-3d;animation:1.3s cubic-bezier(.2,.85,.2,1) both reward-core}html[data-theme] .reward-unlock-core-glass{background:var(--theme-surface-raised);border:1px solid #ffffff59;border-radius:50%;place-items:center;width:48px;height:48px;display:grid}@supports (color:color-mix(in lab, red, red)){html[data-theme] .reward-unlock-core-glass{background:color-mix(in srgb, var(--theme-surface-raised) 54%, transparent)}}html[data-theme] .reward-unlock-core-glass{color:#fff;-webkit-backdrop-filter:blur(9px);backdrop-filter:blur(9px);animation:1.35s cubic-bezier(.25,.8,.2,1) both reward-core-icon}html[data-theme] .reward-unlock-core-glass .app-icon{stroke-width:2.15px;width:27px;height:27px}html[data-theme] .reward-particle{z-index:4;background:var(--reward-b);width:6px;height:6px;box-shadow:0 0 12px var(--reward-b);border-radius:50%;position:absolute;top:50%;left:50%}@supports (color:color-mix(in lab, red, red)){html[data-theme] .reward-particle{box-shadow:0 0 12px color-mix(in srgb, var(--reward-b) 72%, white)}}html[data-theme] .reward-particle{opacity:0;animation:1s ease-out .55s both reward-particle}html[data-theme] .reward-particle.particle-1{--particle-x:-76px;--particle-y:-42px}html[data-theme] .reward-particle.particle-2{--particle-x:72px;--particle-y:-52px;animation-delay:.61s}html[data-theme] .reward-particle.particle-3{--particle-x:84px;--particle-y:16px;animation-delay:.67s}html[data-theme] .reward-particle.particle-4{--particle-x:55px;--particle-y:67px;animation-delay:.58s}html[data-theme] .reward-particle.particle-5{--particle-x:-66px;--particle-y:61px;animation-delay:.7s}html[data-theme] .reward-particle.particle-6{--particle-x:-88px;--particle-y:9px;animation-delay:.64s}html[data-theme] .reward-unlock-card{z-index:2;border:1px solid var(--reward-a);width:100%;padding:66px 22px 20px;position:relative}@supports (color:color-mix(in lab, red, red)){html[data-theme] .reward-unlock-card{border:1px solid color-mix(in srgb, var(--reward-a) 28%, var(--theme-border))}}html[data-theme] .reward-unlock-card{background:radial-gradient(circle at 50% 0%, var(--reward-soft), transparent 42%), var(--theme-surface-raised);border-radius:26px}@supports (color:color-mix(in lab, red, red)){html[data-theme] .reward-unlock-card{background:radial-gradient(circle at 50% 0%, color-mix(in srgb, var(--reward-soft) 82%, transparent), transparent 42%), color-mix(in srgb, var(--theme-surface-raised) 96%, transparent)}}html[data-theme] .reward-unlock-card{color:var(--theme-text);box-shadow:var(--theme-shadow-lg), inset 0 1px 0 #ffffff29;text-align:center;-webkit-backdrop-filter:blur(22px)saturate(130%);backdrop-filter:blur(22px)saturate(130%);transform-origin:50% 0;animation:.56s cubic-bezier(.2,.86,.25,1) .82s both reward-card-reveal}html[data-theme] .reward-unlock-success-mark{background:var(--reward-soft);width:34px;height:34px;color:var(--reward-b);border-radius:50%;place-items:center;margin-bottom:5px;animation:.42s ease-out 1.1s both reward-mark;display:inline-grid}html[data-theme] .reward-unlock-success-mark .app-icon{width:18px;height:18px}html[data-theme] .reward-unlock-card .eyebrow{color:var(--reward-b);margin-bottom:5px}html[data-theme] .reward-unlock-card h2{color:var(--theme-text);letter-spacing:-.035em;margin:0;font-size:clamp(1.45rem,5vw,2rem)}html[data-theme] .reward-unlock-subtitle{color:var(--theme-text-secondary);margin-top:6px;font-size:.72rem;font-weight:850;display:inline-flex}html[data-theme] .reward-unlock-description{max-width:34rem;color:var(--theme-text-muted);margin:10px auto 0;font-size:.8rem;line-height:1.55}html[data-theme] .reward-unlock-actions{gap:5px;margin-top:17px;display:grid}html[data-theme] .reward-unlock-primary-action{justify-content:center;width:100%;min-height:46px;text-decoration:none}html[data-theme] .reward-unlock-later{color:var(--theme-text-muted);justify-self:center}html[data-theme] .reward-unlock-queue-note{border:1px solid var(--theme-border);background:var(--theme-surface);color:var(--theme-text-muted);border-radius:999px;margin-top:10px;padding:6px 10px;font-size:.64rem;font-weight:800;animation:.4s ease-out 1.05s both reward-card-reveal}@keyframes reward-backdrop-in{0%{opacity:0}to{opacity:1}}@keyframes reward-scene-arrive{0%{opacity:0;transform:translateY(30px)scale(.72)rotateX(18deg)}60%{opacity:1}to{opacity:1;transform:translateY(0)scale(1)rotateX(0)}}@keyframes reward-orbit-a{0%{opacity:0;transform:rotateX(68deg)rotate(-120deg)scale(.55)}35%{opacity:.9}to{opacity:.72;transform:rotateX(68deg)rotate(92deg)scale(1)}}@keyframes reward-orbit-b{0%{opacity:0;transform:rotateY(70deg)rotate(130deg)scale(.5)}38%{opacity:.82}to{opacity:.62;transform:rotateY(70deg)rotate(-76deg)scale(1)}}@keyframes reward-orbit-c{0%{opacity:0;transform:rotateX(62deg)rotateY(20deg)rotate(-105deg)scale(.7)}42%{opacity:.55}to{opacity:.35;transform:rotateX(62deg)rotateY(20deg)rotate(56deg)scale(1)}}@keyframes reward-halo{0%{opacity:0;transform:scale(.35)}55%{opacity:1;transform:scale(1.1)}to{opacity:.7;transform:scale(1)}}@keyframes reward-core{0%{opacity:0;transform:translateZ(-80px)scale(.18)rotateY(-120deg)}50%{opacity:1;transform:translateZ(24px)scale(1.12)rotateY(8deg)}72%{transform:translateZ(12px)scale(.94)rotateY(0)}to{opacity:1;transform:translateZ(18px)scale(1)rotateY(0)}}@keyframes reward-core-icon{0%,42%{opacity:0;transform:scale(.3)rotate(-18deg)}70%{opacity:1;transform:scale(1.16)rotate(5deg)}to{opacity:1;transform:scale(1)rotate(0)}}@keyframes reward-particle{0%{opacity:0;transform:translate(-50%,-50%)scale(.2)}30%{opacity:1}to{opacity:0;transform:translate(calc(-50% + var(--particle-x)), calc(-50% + var(--particle-y))) scale(1)}}@keyframes reward-card-reveal{0%{opacity:0;transform:translateY(28px)rotateX(-8deg)scale(.96)}to{opacity:1;transform:translateY(0)rotateX(0)scale(1)}}@keyframes reward-mark{0%{opacity:0;transform:scale(.3)rotate(-18deg)}75%{opacity:1;transform:scale(1.14)rotate(4deg)}to{opacity:1;transform:scale(1)rotate(0)}}@media (max-width:520px){html[data-theme] .reward-unlock-overlay{align-items:end;padding:12px}html[data-theme] .reward-unlock-stage{width:100%}html[data-theme] .reward-unlock-orbit-scene{width:164px;height:164px;margin-bottom:-42px}html[data-theme] .reward-orbit{width:132px;margin-left:-66px}html[data-theme] .reward-orbit-c{width:116px;height:116px;margin:-58px 0 0 -58px}html[data-theme] .reward-unlock-card{border-radius:24px;padding:61px 17px 16px}}@media (prefers-reduced-motion:reduce){html[data-theme] .reward-unlock-overlay *,html[data-theme] .reward-unlock-overlay :before,html[data-theme] .reward-unlock-overlay :after{transition:none!important;animation:none!important}html[data-theme] .reward-unlock-orbit-scene,html[data-theme] .reward-unlock-card,html[data-theme] .reward-unlock-success-mark,html[data-theme] .reward-unlock-queue-note{opacity:1;transform:none}}html[data-theme] .subject-chapter-navigator>summary{cursor:pointer;-webkit-user-select:none;user-select:none;justify-content:space-between;align-items:center;gap:14px;min-height:54px;padding:11px 13px;list-style:none;display:flex}html[data-theme] .subject-chapter-navigator>summary:after{content:"⌄";border:1px solid var(--theme-border);background:var(--theme-surface-soft);width:25px;height:25px;color:var(--theme-text-secondary);border-radius:50%;flex:none;place-items:center;font-size:.82rem;font-weight:900;transition:transform .18s;display:grid}html[data-theme] .subject-chapter-navigator-heading .eyebrow{font-size:.56rem}html[data-theme] .subject-chapter-navigator-counts{flex-wrap:wrap;justify-content:flex-end;gap:5px;margin-left:auto;display:flex}html[data-theme] .subject-chapter-navigator-body{border-top:1px solid var(--theme-border);background:var(--theme-surface-soft);gap:8px;padding:9px;display:grid}@supports (color:color-mix(in lab, red, red)){html[data-theme] .subject-chapter-navigator-row.current{background:color-mix(in srgb, var(--theme-accent-soft) 58%, var(--theme-surface-raised))}html[data-theme] .subject-chapter-navigator-row.complete{border-color:color-mix(in srgb, var(--theme-success) 28%, var(--theme-border))}}html[data-theme] .subject-chapter-row-actions{justify-items:stretch;gap:4px;min-width:104px;display:grid}html[data-theme] .subject-chapter-navigator-empty{color:var(--theme-text-muted);margin:0;padding:11px;font-size:.7rem;line-height:1.5}html[data-theme] .progress-subject-compact-card>.subject-chapter-navigator{margin-top:10px}@media (max-width:640px){html[data-theme] .subject-chapter-navigator>summary{align-items:flex-start;gap:8px}html[data-theme] .subject-chapter-navigator-counts{max-width:48%}html[data-theme] .subject-chapter-navigator-row{grid-template-columns:29px minmax(0,1fr)}html[data-theme] .subject-chapter-state-mark{width:28px;height:28px}html[data-theme] .subject-chapter-row-actions{grid-column:1/-1;grid-template-columns:minmax(0,1fr) minmax(0,1fr);min-width:0}html[data-theme] .subject-chapter-row-actions>:only-child{grid-column:1/-1}html[data-theme] .subject-chapter-row-title{gap:5px}}@media (prefers-reduced-motion:reduce){html[data-theme] .subject-chapter-navigator>summary:after{transition:none}}html[data-theme] .planner-task-card{grid-template-columns:34px minmax(0,1fr) auto;align-items:center}html[data-theme] .planner-task-card.done{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .planner-task-card.done{border-color:color-mix(in srgb, var(--theme-success) 34%, var(--theme-border))}}html[data-theme] .planner-task-card.done{background:var(--theme-success-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .planner-task-card.done{background:color-mix(in srgb, var(--theme-success-soft) 58%, var(--theme-surface))}}html[data-theme] .planner-task-card.done .planner-task-number{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .planner-task-card.done .planner-task-number .app-icon{width:16px;height:16px}html[data-theme] .planner-task-copy{gap:4px;min-width:0;display:grid}html[data-theme] .planner-task-status-line{justify-content:space-between;align-items:center;gap:8px;display:flex}html[data-theme] .planner-live-status{background:var(--theme-accent-soft);color:var(--theme-accent-strong);text-transform:uppercase;letter-spacing:.04em;border-radius:999px;flex:none;padding:3px 7px;font-size:.58rem;font-weight:900}html[data-theme] .planner-live-status.done{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .planner-task-done-rule{color:var(--theme-text-secondary);margin-top:3px;font-size:.66rem;font-weight:750;line-height:1.4;display:block}html[data-theme] .planner-open-task.done{color:var(--theme-success);opacity:1}html[data-theme] .exercise-next-action-banner,html[data-theme] .physics-next-action-banner{border:1px solid var(--theme-accent-border);background:var(--theme-accent-soft);border-radius:15px;justify-content:space-between;align-items:center;gap:12px;padding:12px 13px;display:flex}@supports (color:color-mix(in lab, red, red)){html[data-theme] .exercise-next-action-banner,html[data-theme] .physics-next-action-banner{background:color-mix(in srgb, var(--theme-accent-soft) 72%, var(--theme-surface))}}html[data-theme] .exercise-next-action-banner,html[data-theme] .physics-next-action-banner{color:var(--theme-text)}html[data-theme] .exercise-next-action-banner{grid-column:1/-1}html[data-theme] .exercise-next-action-banner>div,html[data-theme] .physics-next-action-banner>div{gap:2px;min-width:0;display:grid}html[data-theme] .exercise-next-action-banner span,html[data-theme] .physics-next-action-banner span{color:var(--theme-accent-strong);text-transform:uppercase;letter-spacing:.05em;font-size:.6rem;font-weight:900}html[data-theme] .exercise-next-action-banner strong,html[data-theme] .physics-next-action-banner strong{color:var(--theme-text);font-size:.76rem;line-height:1.42}html[data-theme] .physics-next-action-banner{margin-top:-3px}html[data-theme] .student-focus-anchor{scroll-margin-top:22px}html[data-theme] .exercise-question-meta-line{justify-content:space-between;align-items:center;gap:7px;min-height:20px;display:flex}html[data-theme] .exercise-question-action,html[data-theme] .question-leaf-action{background:var(--theme-accent-soft);color:var(--theme-accent-strong);white-space:nowrap;border-radius:999px;flex:none;padding:3px 7px;font-size:.58rem;font-weight:900}html[data-theme] .exercise-question-action.done,html[data-theme] .question-leaf.complete .question-leaf-action{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .question-leaf{grid-template-columns:auto 34px minmax(0,1fr) auto}html[data-theme] .subject-chapter-navigator{border:1px solid var(--theme-border);background:var(--theme-surface);color:var(--theme-text);box-shadow:var(--theme-shadow-sm);border-radius:18px;margin-top:12px;overflow:hidden}html[data-theme] .subject-chapter-navigator>summary{cursor:pointer;-webkit-user-select:none;user-select:none;grid-template-columns:minmax(0,1fr) auto 28px;align-items:center;gap:10px;min-height:58px;padding:11px 13px;list-style:none;display:grid}html[data-theme] .subject-chapter-navigator>summary::-webkit-details-marker{display:none}html[data-theme] .subject-chapter-navigator>summary:after{content:"";border-right:2px solid var(--theme-text-secondary);border-bottom:2px solid var(--theme-text-secondary);justify-self:center;width:9px;height:9px;transition:transform .18s;transform:rotate(45deg)translate(-2px,-2px)}html[data-theme] .subject-chapter-navigator[open]>summary:after{transform:rotate(225deg)translate(-1px,-1px)}html[data-theme] .subject-chapter-navigator-counts span{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-muted);white-space:nowrap;border-radius:999px;padding:4px 7px;font-size:.58rem;font-weight:850}html[data-theme] .subject-chapter-navigator-body{overscroll-behavior:contain;border-top:1px solid var(--theme-border);background:var(--theme-surface-soft);scrollbar-color:var(--theme-text-muted) transparent;gap:8px;max-height:min(64vh,620px);padding:9px;display:grid;overflow-y:auto}@supports (color:color-mix(in lab, red, red)){html[data-theme] .subject-chapter-navigator-body{scrollbar-color:color-mix(in srgb, var(--theme-text-muted) 42%, transparent) transparent}}html[data-theme] .subject-chapter-navigator-row{border:1px solid var(--theme-border);background:var(--theme-surface-raised);min-width:0;color:var(--theme-text);border-radius:14px;grid-template-columns:32px minmax(0,1fr) auto;align-items:center;gap:10px;padding:11px;display:grid}@supports (color:color-mix(in lab, red, red)){html[data-theme] .subject-chapter-navigator-row.current{background:color-mix(in srgb, var(--theme-accent-soft) 62%, var(--theme-surface-raised))}html[data-theme] .subject-chapter-navigator-row.complete{border-color:color-mix(in srgb, var(--theme-success) 35%, var(--theme-border));background:color-mix(in srgb, var(--theme-success-soft) 42%, var(--theme-surface-raised))}}html[data-theme] .subject-chapter-row-title strong{overflow-wrap:anywhere;color:var(--theme-text);font-size:.76rem}html[data-theme] .subject-chapter-locked-note{max-width:112px;color:var(--theme-text-muted);text-align:right;font-size:.58rem;font-weight:750;line-height:1.35}html[data-theme] .student-study-order-only{margin-top:9px}html[data-theme] .exercise-question-group,html[data-theme] .exercise-question-group>summary,html[data-theme] .exercise-question-group[open]>summary,html[data-theme] .exercise-question,html[data-theme] .exercise-question.complete,html[data-theme] .learning-note,html[data-theme] .learning-note>summary,html[data-theme] .learning-note[open]>summary,html[data-theme] .checkpoint-card,html[data-theme] .checkpoint-question,html[data-theme] .checkpoint-option,html[data-theme] .question-set-card,html[data-theme] .question-leaf{border-color:var(--theme-border)!important;background:var(--theme-surface)!important;color:var(--theme-text)!important}html[data-theme] .exercise-question-group[open]>summary,html[data-theme] .learning-note[open]>summary,html[data-theme] .question-set-card,html[data-theme] .question-leaf{background:var(--theme-surface-raised)!important}html[data-theme] .question-group-copy strong,html[data-theme] .exercise-question-math,html[data-theme] .learning-note summary span,html[data-theme] .checkpoint-question-title,html[data-theme] .checkpoint-option .math-text,html[data-theme] .question-set-stem,html[data-theme] .question-leaf .math-text{color:var(--theme-text)!important}html[data-theme] .question-group-copy small,html[data-theme] .exercise-question-copy small,html[data-theme] .learning-note summary small,html[data-theme] .checkpoint-edit-hint,html[data-theme] .question-leaf small{color:var(--theme-text-muted)!important}html[data-theme] .exercise-check,html[data-theme] .checkpoint-option-key{border-color:var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-secondary)}html[data-theme] .exercise-question.complete .exercise-check{border-color:var(--theme-success);background:var(--theme-success);color:#fff}html[data-theme] .student-step-badge{text-align:center;gap:2px;min-width:92px;display:grid}html[data-theme] .student-step-badge strong{color:inherit;font-size:.74rem}html[data-theme] .student-step-badge span{color:var(--theme-text-muted);font-size:.58rem}html[data-theme] .profile-technical-sync-details{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:15px;margin-top:10px;overflow:hidden}html[data-theme] .profile-technical-sync-details>summary{color:var(--theme-text-muted);cursor:pointer;padding:11px 13px;font-size:.7rem;font-weight:850}html[data-theme] .profile-technical-sync-details .profile-settings-list{border-top:1px solid var(--theme-border)}@media (min-width:768px){html[data-theme] .exercise-mobile-switcher{display:none!important}html[data-theme] .exercise-learning-panel{max-height:none!important;position:static!important;top:auto!important;overflow:visible!important}html[data-theme] .math-study-desktop-grid .compact-hidden{display:block!important}}@media (max-width:767px){html[data-theme] .math-study-desktop-grid .compact-hidden{display:none!important}html[data-theme] .planner-task-card{grid-template-columns:30px minmax(0,1fr)}html[data-theme] .planner-open-task{grid-column:1/-1;width:100%;min-height:42px}html[data-theme] .exercise-next-action-banner,html[data-theme] .physics-next-action-banner{flex-direction:column;align-items:stretch}html[data-theme] .exercise-next-action-banner .secondary-button,html[data-theme] .physics-next-action-banner .secondary-button{width:100%}html[data-theme] .subject-chapter-navigator>summary{grid-template-columns:minmax(0,1fr) 26px}html[data-theme] .subject-chapter-navigator-counts{grid-area:2/1/auto/-1;justify-content:flex-start}html[data-theme] .subject-chapter-navigator>summary:after{grid-area:1/2}html[data-theme] .subject-chapter-navigator-body{max-height:58vh}html[data-theme] .subject-chapter-navigator-row{grid-template-columns:29px minmax(0,1fr)}html[data-theme] .subject-chapter-row-actions,html[data-theme] .subject-chapter-locked-note{grid-column:1/-1}html[data-theme] .subject-chapter-row-actions{grid-template-columns:minmax(0,1fr) minmax(0,1fr);min-width:0}html[data-theme] .subject-chapter-row-actions>:only-child{grid-column:1/-1}html[data-theme] .subject-chapter-locked-note{text-align:left;max-width:none}html[data-theme] .question-leaf{grid-template-columns:auto 30px minmax(0,1fr)}html[data-theme] .question-leaf-action{grid-column:2/-1;justify-self:end}}@media (prefers-reduced-motion:reduce){html[data-theme] .subject-chapter-navigator>summary:after{transition:none}}html[data-theme] .progress-technical-label{color:var(--theme-text-muted);letter-spacing:.02em;margin-top:2px;font-size:.56rem;font-weight:750;display:block}html[data-theme]{--ui-motion-fast:.16s;--ui-motion-standard:.22s;--ui-ease:cubic-bezier(.2,.78,.2,1)}html[data-theme] .student-subject-card,html[data-theme] .progress-detail-card,html[data-theme] .profile-settings-group,html[data-theme] .profile-streak-panel,html[data-theme] .planner-explain-details,html[data-theme] .planner-week-details,html[data-theme] .planner-settings-card,html[data-theme] .info-card{transition:background-color var(--ui-motion-standard) ease, border-color var(--ui-motion-standard) ease, color var(--ui-motion-standard) ease, box-shadow var(--ui-motion-standard) ease}html[data-theme] button,html[data-theme] a.primary-button,html[data-theme] a.secondary-button,html[data-theme] a.text-button{-webkit-tap-highlight-color:transparent}@media (hover:hover) and (pointer:fine){html[data-theme] .student-subject-card:hover,html[data-theme] .progress-detail-card:hover{border-color:var(--theme-accent)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .student-subject-card:hover,html[data-theme] .progress-detail-card:hover{border-color:color-mix(in srgb, var(--theme-accent) 24%, var(--theme-border))}}html[data-theme] .student-subject-card:hover,html[data-theme] .progress-detail-card:hover{box-shadow:var(--theme-shadow-md)}}html[data-theme] button:active:not(:disabled),html[data-theme] a.primary-button:active,html[data-theme] a.secondary-button:active{transform:scale(.985)}html[data-theme] .subject-chapter-launcher{border:1px solid var(--theme-accent-border);background:linear-gradient(145deg, var(--theme-accent-soft), var(--theme-surface));border-radius:17px;grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:12px;width:100%;min-height:66px;margin-top:12px;padding:12px 13px;display:grid;position:relative}@supports (color:color-mix(in lab, red, red)){html[data-theme] .subject-chapter-launcher{background:linear-gradient(145deg, color-mix(in srgb, var(--theme-accent-soft) 72%, var(--theme-surface)), var(--theme-surface))}}html[data-theme] .subject-chapter-launcher{color:var(--theme-text);box-shadow:var(--theme-shadow-sm);text-align:left;cursor:pointer;transition:transform var(--ui-motion-fast) var(--ui-ease), border-color var(--ui-motion-fast) ease, box-shadow var(--ui-motion-fast) ease;overflow:hidden}html[data-theme] .subject-chapter-launcher:before{content:"";background:var(--theme-accent);width:3px;position:absolute;inset:0 auto 0 0}html[data-theme] .subject-chapter-launcher:hover{border-color:var(--theme-accent);box-shadow:var(--theme-shadow-md)}html[data-theme] .subject-chapter-navigator-heading{gap:2px;min-width:0;display:grid}html[data-theme] .subject-chapter-navigator-heading strong{color:var(--theme-text);font-size:.86rem}html[data-theme] .subject-chapter-navigator-heading small{color:var(--theme-text-muted);font-size:.62rem;line-height:1.35}html[data-theme] .subject-chapter-navigator-counts{flex-wrap:wrap;justify-content:flex-end;gap:5px;display:flex}html[data-theme] .subject-chapter-navigator-counts span,html[data-theme] .subject-chapter-drawer-summary span{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-muted);white-space:nowrap;border-radius:999px;padding:5px 8px;font-size:.6rem;font-weight:850}html[data-theme] .subject-chapter-navigator-counts .current,html[data-theme] .subject-chapter-drawer-summary .current{border-color:var(--theme-accent-border);background:var(--theme-accent-soft);color:var(--theme-accent-strong)}html[data-theme] .subject-chapter-navigator-counts .complete,html[data-theme] .subject-chapter-drawer-summary .complete{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .subject-chapter-navigator-counts .complete,html[data-theme] .subject-chapter-drawer-summary .complete{border-color:color-mix(in srgb, var(--theme-success) 30%, var(--theme-border))}}html[data-theme] .subject-chapter-navigator-counts .complete,html[data-theme] .subject-chapter-drawer-summary .complete{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .subject-chapter-launcher-action{color:var(--theme-accent-strong);align-items:center;gap:7px;font-size:.69rem;font-weight:900;display:inline-flex}html[data-theme] .subject-chapter-launcher-action i{border-bottom:2px solid;border-right:2px solid;width:9px;height:9px;transform:rotate(-45deg)}html[data-theme] .subject-chapter-drawer-layer{z-index:4600;justify-items:end;display:grid;position:fixed;inset:0}html[data-theme] .subject-chapter-drawer-backdrop{background:var(--theme-overlay);border:0;width:100%;height:100%;position:absolute;inset:0}@supports (color:color-mix(in lab, red, red)){html[data-theme] .subject-chapter-drawer-backdrop{background:color-mix(in srgb, var(--theme-overlay) 82%, transparent)}}html[data-theme] .subject-chapter-drawer-backdrop{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);animation:phase38-backdrop-in var(--ui-motion-fast) ease-out both}html[data-theme] .subject-chapter-drawer{z-index:1;border-left:1px solid var(--theme-border);background:var(--theme-bg);width:min(560px,92vw);height:100dvh;color:var(--theme-text);animation:phase38-drawer-in var(--ui-motion-standard) var(--ui-ease) both;grid-template-rows:auto auto auto minmax(0,1fr) auto;display:grid;position:relative;overflow:hidden;box-shadow:-24px 0 70px #00000038}html[data-theme] .subject-chapter-drawer-header{z-index:3;border-bottom:1px solid var(--theme-border);background:var(--theme-surface-raised);justify-content:space-between;align-items:flex-start;gap:14px;padding:18px 18px 14px;display:flex;position:sticky;top:0}@supports (color:color-mix(in lab, red, red)){html[data-theme] .subject-chapter-drawer-header{background:color-mix(in srgb, var(--theme-surface-raised) 94%, transparent)}}html[data-theme] .subject-chapter-drawer-header{-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}html[data-theme] .subject-chapter-drawer-header h2{color:var(--theme-text);margin:2px 0 4px;font-size:1.1rem}html[data-theme] .subject-chapter-drawer-header p:not(.eyebrow){color:var(--theme-text-muted);margin:0;font-size:.72rem;line-height:1.45}html[data-theme] .subject-chapter-drawer-close{border:1px solid var(--theme-border);background:var(--theme-surface-soft);width:38px;height:38px;color:var(--theme-text-secondary);cursor:pointer;border-radius:12px;flex:none;place-items:center;padding:0;display:grid}html[data-theme] .subject-chapter-drawer-close span{font-size:1.25rem;line-height:1}html[data-theme] .subject-chapter-drawer-summary{flex-wrap:wrap;gap:6px;padding:10px 16px 0;display:flex}html[data-theme] .subject-chapter-drawer-lock-note{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:13px;gap:2px;margin:10px 16px 0;padding:10px 11px;display:grid}html[data-theme] .subject-chapter-drawer-lock-note strong{color:var(--theme-text-secondary);font-size:.68rem}html[data-theme] .subject-chapter-drawer-lock-note span{color:var(--theme-text-muted);font-size:.64rem;line-height:1.4}html[data-theme] .subject-chapter-drawer-body{overscroll-behavior:contain;scrollbar-color:var(--theme-text-muted) transparent;align-content:start;gap:8px;min-height:0;padding:12px 16px 18px;display:grid;overflow-y:auto}@supports (color:color-mix(in lab, red, red)){html[data-theme] .subject-chapter-drawer-body{scrollbar-color:color-mix(in srgb, var(--theme-text-muted) 38%, transparent) transparent}}html[data-theme] .subject-chapter-navigator-row{border:1px solid var(--theme-border);background:var(--theme-surface);min-width:0;color:var(--theme-text);transition:transform var(--ui-motion-fast) var(--ui-ease), border-color var(--ui-motion-fast) ease, background-color var(--ui-motion-fast) ease;border-radius:14px;grid-template-columns:34px minmax(0,1fr) auto;align-items:center;gap:10px;padding:11px;display:grid}html[data-theme] .subject-chapter-navigator-row.current{border-color:var(--theme-accent-border);background:var(--theme-accent-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .subject-chapter-navigator-row.current{background:color-mix(in srgb, var(--theme-accent-soft) 66%, var(--theme-surface))}}html[data-theme] .subject-chapter-navigator-row.current{box-shadow:inset 3px 0 0 var(--theme-accent)}html[data-theme] .subject-chapter-navigator-row.complete{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .subject-chapter-navigator-row.complete{border-color:color-mix(in srgb, var(--theme-success) 30%, var(--theme-border))}}html[data-theme] .subject-chapter-navigator-row.complete{background:var(--theme-success-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .subject-chapter-navigator-row.complete{background:color-mix(in srgb, var(--theme-success-soft) 34%, var(--theme-surface))}}html[data-theme] .subject-chapter-navigator-row.locked{background:var(--theme-surface-soft)}html[data-theme] .subject-chapter-state-mark{background:var(--theme-surface-raised);width:32px;height:32px;color:var(--theme-text-muted);border-radius:10px;place-items:center;font-size:.67rem;font-weight:900;display:grid}html[data-theme] .subject-chapter-navigator-row.current .subject-chapter-state-mark{background:var(--theme-accent-soft);color:var(--theme-accent-strong)}html[data-theme] .subject-chapter-navigator-row.complete .subject-chapter-state-mark{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .subject-chapter-row-copy{gap:5px;min-width:0;display:grid}html[data-theme] .subject-chapter-row-title{justify-content:space-between;align-items:flex-start;gap:8px;display:flex}html[data-theme] .subject-chapter-row-title>div{gap:1px;min-width:0;display:grid}html[data-theme] .subject-chapter-row-title>div>span{color:var(--theme-text-muted);text-transform:uppercase;letter-spacing:.04em;font-size:.58rem;font-weight:850}html[data-theme] .subject-chapter-row-title strong{color:var(--theme-text);overflow-wrap:anywhere;font-size:.77rem}html[data-theme] .subject-chapter-status{background:var(--theme-surface-raised);color:var(--theme-text-muted);border-radius:999px;flex:none;padding:3px 6px;font-size:.56rem;font-weight:850}html[data-theme] .subject-chapter-status.current{background:var(--theme-accent-soft);color:var(--theme-accent-strong)}html[data-theme] .subject-chapter-status.complete{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .subject-chapter-row-copy p{color:var(--theme-text-muted);margin:0;font-size:.65rem;line-height:1.42}html[data-theme] .subject-chapter-progress-line{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:8px;display:grid}html[data-theme] .subject-chapter-progress-line strong{color:var(--theme-text-secondary);font-size:.61rem}html[data-theme] .subject-chapter-row-actions{gap:4px;min-width:112px;display:grid}html[data-theme] .subject-chapter-row-actions .secondary-button,html[data-theme] .subject-chapter-row-actions .text-button{text-align:center;white-space:nowrap;justify-content:center;min-height:34px;padding:7px 9px;font-size:.64rem;text-decoration:none}html[data-theme] .subject-chapter-lock-icon{background:var(--theme-surface-raised);width:30px;height:30px;color:var(--theme-text-muted);filter:grayscale();opacity:.72;border-radius:10px;place-items:center;font-size:.7rem;display:grid}html[data-theme] .subject-chapter-drawer-footer{max-height:40dvh;padding:12px 16px max(16px, env(safe-area-inset-bottom));border-top:1px solid var(--theme-border);background:var(--theme-surface-raised);overflow-y:auto}html[data-theme] .chapter-drawer-study-order{gap:10px;display:grid}html[data-theme] .chapter-drawer-study-order-heading{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}html[data-theme] .chapter-drawer-study-order-heading>div{gap:2px;display:grid}html[data-theme] .chapter-drawer-study-order-heading span,html[data-theme] .chapter-drawer-study-order-heading small{color:var(--theme-text-muted);font-size:.62rem}html[data-theme] .chapter-drawer-study-order-heading strong{color:var(--theme-text);font-size:.76rem}html[data-theme] .chapter-drawer-study-order-heading small{text-align:right;max-width:250px;line-height:1.4}html[data-theme] .chapter-review-hub{gap:14px}html[data-theme] .chapter-review-hero,html[data-theme] .chapter-review-quick-actions,html[data-theme] .chapter-review-section{border:1px solid var(--theme-border);background:var(--theme-surface);color:var(--theme-text);box-shadow:var(--theme-shadow-sm);border-radius:22px}html[data-theme] .chapter-review-hero{background:radial-gradient(circle at 4% 5%, var(--theme-success-soft), transparent 36%), var(--theme-surface);grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:15px;padding:18px;display:grid}@supports (color:color-mix(in lab, red, red)){html[data-theme] .chapter-review-hero{background:radial-gradient(circle at 4% 5%, color-mix(in srgb, var(--theme-success-soft) 68%, transparent), transparent 36%), var(--theme-surface)}}html[data-theme] .chapter-review-hero-icon{background:var(--theme-success-soft);width:54px;height:54px;color:var(--theme-success);box-shadow:inset 0 0 0 1px var(--theme-success);border-radius:17px;place-items:center;display:grid}@supports (color:color-mix(in lab, red, red)){html[data-theme] .chapter-review-hero-icon{box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--theme-success) 22%, transparent)}}html[data-theme] .chapter-review-hero-icon.physics{background:var(--theme-accent-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .chapter-review-hero-icon.physics{background:color-mix(in srgb, var(--theme-accent-soft) 70%, var(--theme-success-soft))}}html[data-theme] .chapter-review-hero-icon.physics{color:var(--theme-accent-strong)}html[data-theme] .chapter-review-hero-icon .app-icon{width:26px;height:26px}html[data-theme] .chapter-review-hero h1{color:var(--theme-text);margin:2px 0 5px;font-size:clamp(1.35rem,3vw,1.9rem)}html[data-theme] .chapter-review-hero p:not(.eyebrow),html[data-theme] .chapter-review-quick-actions p,html[data-theme] .chapter-review-stage-card p{color:var(--theme-text-muted);margin:0;line-height:1.48}html[data-theme] .chapter-review-hero p:not(.eyebrow){font-size:.76rem}html[data-theme] .chapter-review-status{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-muted);white-space:nowrap;border-radius:999px;flex:none;padding:5px 8px;font-size:.6rem;font-weight:850}html[data-theme] .chapter-review-status.complete{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .chapter-review-status.complete{border-color:color-mix(in srgb, var(--theme-success) 30%, var(--theme-border))}}html[data-theme] .chapter-review-status.complete{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .chapter-review-quick-actions{justify-content:space-between;align-items:center;gap:18px;padding:15px 17px;display:flex}html[data-theme] .chapter-review-quick-actions h2{margin:2px 0 3px;font-size:1rem}html[data-theme] .chapter-review-quick-actions p{font-size:.7rem}html[data-theme] .chapter-review-quick-actions .primary-button{flex:none;text-decoration:none}html[data-theme] .chapter-review-section{padding:16px}html[data-theme] .chapter-review-section-heading{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:10px;display:flex}html[data-theme] .chapter-review-section-heading h2{margin:2px 0 0;font-size:1rem}html[data-theme] .chapter-review-section-heading>span{background:var(--theme-surface-soft);color:var(--theme-text-muted);border-radius:999px;padding:5px 8px;font-size:.62rem;font-weight:850}html[data-theme] .chapter-review-grid{gap:8px;display:grid}html[data-theme] .chapter-review-stage-card{border:1px solid var(--theme-border);background:var(--theme-surface-soft);transition:transform var(--ui-motion-fast) var(--ui-ease), border-color var(--ui-motion-fast) ease, background-color var(--ui-motion-fast) ease;border-radius:15px;grid-template-columns:34px minmax(0,1fr) auto auto;align-items:center;gap:10px;padding:11px;display:grid}html[data-theme] .chapter-review-stage-card.featured{border-color:var(--theme-accent-border);background:var(--theme-accent-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .chapter-review-stage-card.featured{background:color-mix(in srgb, var(--theme-accent-soft) 62%, var(--theme-surface-soft))}}@media (hover:hover) and (pointer:fine){html[data-theme] .chapter-review-stage-card:hover{border-color:var(--theme-accent);transform:translateY(-1px)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .chapter-review-stage-card:hover{border-color:color-mix(in srgb, var(--theme-accent) 28%, var(--theme-border))}}}html[data-theme] .chapter-review-stage-number{background:var(--theme-accent-soft);width:32px;height:32px;color:var(--theme-accent-strong);border-radius:10px;place-items:center;font-size:.68rem;font-weight:900;display:grid}html[data-theme] .chapter-review-stage-number .app-icon{width:17px;height:17px}html[data-theme] .chapter-review-stage-card>div{min-width:0}html[data-theme] .chapter-review-stage-card strong{color:var(--theme-text);font-size:.76rem}html[data-theme] .chapter-review-stage-card p{margin-top:2px;font-size:.64rem}html[data-theme] .chapter-review-stage-card .secondary-button,html[data-theme] .chapter-review-stage-card .primary-button{white-space:nowrap;justify-content:center;min-height:35px;padding:7px 10px;font-size:.64rem;text-decoration:none}html[data-theme] .review-origin-study-route{display:grid}html[data-theme] .review-return-bar{z-index:18;border:1px solid var(--theme-accent-border);background:var(--theme-surface-raised);border-radius:999px;justify-self:start;margin:8px 0 -2px;padding:8px 11px;position:sticky;top:8px}@supports (color:color-mix(in lab, red, red)){html[data-theme] .review-return-bar{background:color-mix(in srgb, var(--theme-surface-raised) 92%, transparent)}}html[data-theme] .review-return-bar{color:var(--theme-accent-strong);box-shadow:var(--theme-shadow-sm);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);font:inherit;cursor:pointer;font-size:.68rem;font-weight:850}html[data-theme] .review-origin-study-route>.page>.back-link:first-child{display:none}html[data-theme] .student-subject-card .student-current-study{margin-top:10px}html[data-theme] .future-subject-cluster{gap:11px}html[data-theme] .future-subject-cluster-heading{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}html[data-theme] .future-subject-cluster-heading h2{margin:2px 0 3px}html[data-theme] .future-subject-cluster-heading p:not(.eyebrow){color:var(--theme-text-muted);margin:0;font-size:.7rem;line-height:1.45}html[data-theme] .future-subject-chip-grid,html[data-theme] .progress-published-subjects,html[data-theme] .progress-upcoming-subjects>div{flex-wrap:wrap;gap:7px;display:flex}html[data-theme] .future-subject-chip,html[data-theme] .progress-upcoming-subjects>div>span{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-secondary);border-radius:999px;align-items:center;gap:6px;padding:7px 9px;font-size:.66rem;font-weight:750;display:inline-flex}html[data-theme] .progress-availability-card{gap:10px;display:grid}html[data-theme] .progress-published-subjects>span{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:13px;grid-template-columns:auto 1fr auto;align-items:center;gap:7px;min-width:185px;padding:9px 10px;display:grid}html[data-theme] .progress-published-subjects strong{color:var(--theme-text);font-size:.7rem}html[data-theme] .progress-published-subjects small{color:var(--theme-success);font-size:.58rem;font-weight:850}html[data-theme] .progress-upcoming-subjects{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:13px;overflow:hidden}html[data-theme] .progress-upcoming-subjects>summary{color:var(--theme-text-secondary);cursor:pointer;padding:10px 11px;font-size:.68rem;font-weight:850}html[data-theme] .progress-upcoming-subjects>div{padding:0 10px 10px}html[data-theme] .planner-explain-details,html[data-theme] .planner-week-details{overflow:hidden;border-color:var(--theme-border)!important;background:var(--theme-surface)!important;color:var(--theme-text)!important}html[data-theme] .planner-explain-details>summary,html[data-theme] .planner-week-details>summary{cursor:pointer;padding:12px 38px 12px 14px;position:relative;background:var(--theme-surface)!important;color:var(--theme-accent-strong)!important}html[data-theme] .planner-explain-details>summary:after,html[data-theme] .planner-week-details>summary:after,html[data-theme] .planner-technical-plan-details>summary:after{content:"";width:8px;height:8px;transition:transform var(--ui-motion-fast) var(--ui-ease);border-bottom:2px solid;border-right:2px solid;position:absolute;top:50%;right:15px;transform:translateY(-65%)rotate(45deg)}html[data-theme] .planner-explain-details[open]>summary,html[data-theme] .planner-week-details[open]>summary{border-bottom-color:var(--theme-border)!important;background:var(--theme-surface-raised)!important}html[data-theme] .planner-explain-details[open]>summary:after,html[data-theme] .planner-week-details[open]>summary:after,html[data-theme] .planner-technical-plan-details[open]>summary:after{transform:translateY(-35%)rotate(225deg)}html[data-theme] .planner-student-reason-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;padding:12px;display:grid}html[data-theme] .planner-student-reason-grid article{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:13px;align-items:flex-start;gap:9px;padding:11px;display:flex}html[data-theme] .planner-student-reason-grid .app-icon{width:18px;height:18px;color:var(--theme-accent-strong);flex:none}html[data-theme] .planner-student-reason-grid article>div{gap:3px;display:grid}html[data-theme] .planner-student-reason-grid strong{color:var(--theme-text);font-size:.68rem}html[data-theme] .planner-student-reason-grid span{color:var(--theme-text-muted);font-size:.62rem;line-height:1.42}html[data-theme] .planner-technical-plan-details{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:13px;margin:0 12px 12px;overflow:hidden}html[data-theme] .planner-technical-plan-details>summary{color:var(--theme-text-muted);cursor:pointer;padding:10px 34px 10px 11px;font-size:.65rem;font-weight:850;position:relative}html[data-theme] .planner-explain-details .planner-week-summary,html[data-theme] .planner-week-details .planner-week-section,html[data-theme] .planner-week-details .planner-subject-section,html[data-theme] .planner-technical-plan-details .planner-week-summary{color:var(--theme-text)}html[data-theme] .planner-week-summary>div,html[data-theme] .planner-source-note,html[data-theme] .planner-day,html[data-theme] .planner-subject-balance article{border-color:var(--theme-border)!important;background:var(--theme-surface-raised)!important;color:var(--theme-text)!important}html[data-theme] .planner-week-summary span,html[data-theme] .planner-source-note small,html[data-theme] .planner-source-note span,html[data-theme] .planner-capacity-note,html[data-theme] .planner-day span,html[data-theme] .planner-day small{color:var(--theme-text-muted)!important}html[data-theme] .planner-week-summary strong,html[data-theme] .planner-source-note strong,html[data-theme] .planner-day strong,html[data-theme] .planner-day b,html[data-theme] .planner-subject-balance strong{color:var(--theme-text)!important}html[data-theme] .profile-streak-panel-v4{gap:13px;border-color:var(--theme-border)!important;background:radial-gradient(circle at 5% 0%, var(--theme-warning-soft), transparent 34%), var(--theme-surface)!important}@supports (color:color-mix(in lab, red, red)){html[data-theme] .profile-streak-panel-v4{background:radial-gradient(circle at 5% 0%, color-mix(in srgb, var(--theme-warning-soft) 56%, transparent), transparent 34%), var(--theme-surface)!important}}html[data-theme] .profile-streak-hero{border:1px solid var(--theme-border);background:var(--theme-surface-raised);border-radius:18px;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:14px;padding:15px;display:grid}html[data-theme] .profile-streak-flame{background:var(--theme-warning-soft);width:62px;height:62px;color:var(--theme-warning);box-shadow:inset 0 0 0 1px var(--theme-warning);border-radius:19px;place-items:center;display:grid;position:relative}@supports (color:color-mix(in lab, red, red)){html[data-theme] .profile-streak-flame{box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--theme-warning) 22%, transparent)}}html[data-theme] .profile-streak-flame .app-icon{width:30px;height:30px}html[data-theme] .profile-streak-panel-v4.is-active .profile-streak-flame:after{content:"";z-index:-1;background:var(--theme-warning);border-radius:24px;position:absolute;inset:-7px}@supports (color:color-mix(in lab, red, red)){html[data-theme] .profile-streak-panel-v4.is-active .profile-streak-flame:after{background:color-mix(in srgb, var(--theme-warning) 16%, transparent)}}html[data-theme] .profile-streak-panel-v4.is-active .profile-streak-flame:after{filter:blur(8px);animation:2.2s ease-in-out infinite phase38-streak-glow}html[data-theme] .profile-streak-main-copy{gap:3px;min-width:0;display:grid}html[data-theme] .profile-streak-main-copy>span,html[data-theme] .profile-streak-side-stats span{font-size:.62rem;font-weight:800;color:var(--theme-text-muted)!important}html[data-theme] .profile-streak-main-copy>strong{align-items:baseline;gap:6px;font-size:2rem;line-height:1;display:flex;color:var(--theme-text)!important}html[data-theme] .profile-streak-main-copy>strong small{color:var(--theme-text-secondary);font-size:.7rem;font-weight:800}html[data-theme] .profile-streak-main-copy p{color:var(--theme-text-muted);margin:2px 0 0;font-size:.66rem;line-height:1.4}html[data-theme] .profile-streak-side-stats{grid-template-columns:repeat(2,minmax(70px,1fr));gap:7px;display:grid}html[data-theme] .profile-streak-side-stats>div{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:12px;gap:3px;min-width:70px;padding:9px;display:grid}html[data-theme] .profile-streak-side-stats strong{font-size:1rem;color:var(--theme-text)!important}html[data-theme] .profile-week-activity{grid-template-columns:repeat(7,minmax(0,1fr));gap:6px;display:grid}html[data-theme] .profile-week-activity>div{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:11px;justify-items:center;gap:4px;padding:7px 4px;display:grid}html[data-theme] .profile-week-activity span{color:var(--theme-text-muted);font-size:.55rem;font-weight:800}html[data-theme] .profile-week-activity b{background:var(--theme-surface-raised);width:25px;height:25px;color:var(--theme-text-secondary);border-radius:8px;place-items:center;font-size:.61rem;display:grid}html[data-theme] .profile-week-activity .done{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .profile-week-activity .done{border-color:color-mix(in srgb, var(--theme-success) 28%, var(--theme-border))}}html[data-theme] .profile-week-activity .done{background:var(--theme-success-soft)}html[data-theme] .profile-week-activity .done b{background:var(--theme-success);color:#fff}html[data-theme] .profile-week-activity .rest b{background:var(--theme-accent-soft);color:var(--theme-accent-strong)}html[data-theme] .profile-week-activity .today{box-shadow:inset 0 0 0 1px var(--theme-accent)}html[data-theme] .profile-week-legend{color:var(--theme-text-muted);gap:12px;font-size:.58rem;font-weight:750;display:flex}html[data-theme] .profile-week-legend span{align-items:center;gap:5px;display:inline-flex}html[data-theme] .profile-week-legend i{background:var(--theme-surface-raised);border-radius:50%;width:8px;height:8px}html[data-theme] .profile-week-legend i.done{background:var(--theme-success)}html[data-theme] .profile-week-legend i.rest{background:var(--theme-accent)}html[data-theme] .profile-streak-note,html[data-theme] .profile-panel-heading>span{color:var(--theme-text-muted)!important}html[data-theme] .checkpoint-retry-button{color:var(--theme-text-muted)}html[data-theme] .checkpoint-result.passed{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .checkpoint-result.passed{border-color:color-mix(in srgb, var(--theme-success) 36%, var(--theme-border))}}html[data-theme] .checkpoint-result.passed{background:var(--theme-success-soft)}html[data-theme] .checkpoint-result.passed h3,html[data-theme] .checkpoint-result.passed p,html[data-theme] .checkpoint-result.passed .eyebrow{color:var(--theme-text)!important}html[data-theme] .checkpoint-explanation,html[data-theme] .checkpoint-explanation.correct,html[data-theme] .checkpoint-explanation.incorrect,html[data-theme] .compact-selection-details,html[data-theme] .academic-source-context,html[data-theme] .chapter-reference-card,html[data-theme] .exam-priority-card,html[data-theme] .exam-source-question{border-color:var(--theme-border)!important;background:var(--theme-surface-raised)!important;color:var(--theme-text)!important}html[data-theme] .checkpoint-explanation p,html[data-theme] .checkpoint-explanation small,html[data-theme] .compact-selection-details p,html[data-theme] .academic-source-reference{color:var(--theme-text-muted)!important}@media (max-width:899px){html[data-theme] .app-main{padding-bottom:calc(136px + env(safe-area-inset-bottom))!important}}@media (max-width:760px){html[data-theme] .subject-chapter-launcher{grid-template-columns:minmax(0,1fr) auto}html[data-theme] .subject-chapter-navigator-counts{grid-area:2/1/auto/-1;justify-content:flex-start}html[data-theme] .subject-chapter-launcher-action{grid-area:1/2}html[data-theme] .subject-chapter-drawer-layer{place-items:end stretch}html[data-theme] .subject-chapter-drawer{border-top:1px solid var(--theme-border);border-left:0;border-radius:24px 24px 0 0;width:100%;height:min(92dvh,820px);animation-name:phase38-sheet-in;box-shadow:0 -24px 70px #0000003d}html[data-theme] .subject-chapter-drawer-header{padding:15px 15px 12px}html[data-theme] .subject-chapter-drawer-header:before{content:"";background:var(--theme-border);border-radius:999px;width:36px;height:4px;position:absolute;top:7px;left:50%;transform:translate(-50%)}html[data-theme] .subject-chapter-drawer-header>div{padding-top:7px}html[data-theme] .subject-chapter-navigator-row{grid-template-columns:30px minmax(0,1fr) auto;padding:10px}html[data-theme] .subject-chapter-row-actions{grid-column:1/-1;grid-template-columns:repeat(2,minmax(0,1fr));min-width:0}html[data-theme] .subject-chapter-row-actions>:only-child{grid-column:1/-1}html[data-theme] .subject-chapter-lock-icon{width:28px;height:28px}html[data-theme] .chapter-drawer-study-order-heading{flex-direction:column}html[data-theme] .chapter-drawer-study-order-heading small{text-align:left;max-width:none}html[data-theme] .chapter-review-hero{grid-template-columns:auto minmax(0,1fr)}html[data-theme] .chapter-review-hero>.chapter-review-status{grid-column:1/-1;justify-self:start}html[data-theme] .chapter-review-quick-actions{flex-direction:column;align-items:stretch}html[data-theme] .chapter-review-quick-actions .primary-button{justify-content:center;width:100%}html[data-theme] .chapter-review-stage-card{grid-template-columns:30px minmax(0,1fr) auto}html[data-theme] .chapter-review-stage-card>.secondary-button,html[data-theme] .chapter-review-stage-card>.primary-button,html[data-theme] .chapter-review-stage-card>a.primary-button{grid-column:1/-1;width:100%}html[data-theme] .planner-student-reason-grid{grid-template-columns:1fr}html[data-theme] .profile-streak-hero{grid-template-columns:auto minmax(0,1fr)}html[data-theme] .profile-streak-side-stats{grid-column:1/-1;grid-template-columns:repeat(2,minmax(0,1fr))}html[data-theme] .profile-week-activity{gap:4px}html[data-theme] .profile-week-activity>div{padding-inline:2px}}@media (max-width:430px){html[data-theme] .subject-chapter-drawer-summary,html[data-theme] .subject-chapter-drawer-lock-note,html[data-theme] .subject-chapter-drawer-body,html[data-theme] .subject-chapter-drawer-footer{margin-left:0;margin-right:0}html[data-theme] .subject-chapter-row-title{gap:5px}html[data-theme] .subject-chapter-row-title strong{font-size:.75rem}html[data-theme] .subject-chapter-row-copy p{font-size:.64rem}html[data-theme] .profile-streak-flame{width:54px;height:54px}html[data-theme] .profile-streak-main-copy>strong{font-size:1.7rem}}@keyframes phase38-backdrop-in{0%{opacity:0}to{opacity:1}}@keyframes phase38-drawer-in{0%{opacity:.75;transform:translate(28px)}to{opacity:1;transform:translate(0)}}@keyframes phase38-sheet-in{0%{opacity:.78;transform:translateY(34px)}to{opacity:1;transform:translateY(0)}}@keyframes phase38-streak-glow{0%,to{opacity:.45;transform:scale(.96)}50%{opacity:.85;transform:scale(1.05)}}@media (prefers-reduced-motion:reduce){html[data-theme] *,html[data-theme] :before,html[data-theme] :after{scroll-behavior:auto!important}html[data-theme] .subject-chapter-drawer-backdrop,html[data-theme] .subject-chapter-drawer,html[data-theme] .profile-streak-panel-v4.is-active .profile-streak-flame:after{animation:none!important}html[data-theme] .student-subject-card,html[data-theme] .progress-detail-card,html[data-theme] .profile-settings-group,html[data-theme] .profile-streak-panel,html[data-theme] button,html[data-theme] a{transition:none!important}}html[data-theme] .chapter-drawer-study-order-details{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:13px;overflow:hidden}html[data-theme] .chapter-drawer-study-order-details>summary{color:var(--theme-text-secondary);cursor:pointer;justify-content:space-between;align-items:center;gap:10px;padding:10px 11px;font-size:.67rem;font-weight:850;display:flex}html[data-theme] .chapter-drawer-study-order-details>summary b{color:var(--theme-accent-strong)}html[data-theme] .chapter-drawer-study-order-details[open]>summary{border-bottom:1px solid var(--theme-border)}html[data-theme] .chapter-drawer-study-order-details .chapter-drawer-study-order-heading{padding:10px 10px 0}html[data-theme] .chapter-drawer-study-order-details>:not(summary):not(.chapter-drawer-study-order-heading){margin:10px}html[data-theme] .progress-overall-section{gap:12px;display:grid}html[data-theme] .progress-overall-heading{justify-content:space-between;align-items:end;gap:14px;display:flex}html[data-theme] .progress-overall-heading h2{color:var(--theme-text);margin:2px 0 0;font-size:1rem}html[data-theme] .progress-overall-heading>span{color:var(--theme-text-muted);font-size:.68rem;font-weight:750}html[data-theme] .progress-unified-page .progress-dimension-card{border-color:var(--theme-border);background:var(--theme-surface);min-width:0}html[data-theme] .progress-unified-page .progress-dimension-card.primary{border-color:var(--theme-accent-border);background:linear-gradient(145deg, var(--theme-accent-soft), var(--theme-surface))}@supports (color:color-mix(in lab, red, red)){html[data-theme] .progress-unified-page .progress-dimension-card.primary{background:linear-gradient(145deg, color-mix(in srgb, var(--theme-accent-soft) 62%, var(--theme-surface)), var(--theme-surface))}}html[data-theme] .progress-unified-page .progress-dimension-card>span{color:var(--theme-text-secondary)}html[data-theme] .progress-unified-page .progress-dimension-card>p{color:var(--theme-text-muted)}html[data-theme] .progress-subject-dashboard{border:1px solid var(--theme-border);background:var(--theme-surface);box-shadow:var(--theme-shadow-sm);border-radius:20px;gap:12px;padding:17px;display:grid}html[data-theme] .progress-subject-dashboard-header{justify-content:space-between;align-items:center;gap:14px;display:flex}html[data-theme] .progress-subject-dashboard-header h2{color:var(--theme-text);margin:2px 0 0;font-size:1rem}html[data-theme] .progress-subject-primary-percent{justify-items:end;gap:2px;min-width:84px;display:grid}html[data-theme] .progress-subject-primary-percent strong{color:var(--theme-text);letter-spacing:-.025em;font-size:1.45rem;line-height:1}html[data-theme] .progress-subject-primary-percent span{color:var(--theme-text-muted);text-transform:uppercase;letter-spacing:.04em;font-size:.6rem;font-weight:800}html[data-theme] .progress-subject-metric-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}html[data-theme] .progress-subject-metric-grid>div{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:13px;gap:3px;min-width:0;padding:11px 12px;display:grid}html[data-theme] .progress-subject-metric-grid span{color:var(--theme-text-muted);font-size:.65rem;font-weight:750}html[data-theme] .progress-subject-metric-grid strong{color:var(--theme-text);overflow-wrap:anywhere;font-size:.95rem}html[data-theme] .progress-subject-metric-grid small{color:var(--theme-text-muted);font-size:.58rem;line-height:1.35}html[data-theme] .progress-current-chapter-card{border:1px solid var(--theme-accent-border);background:linear-gradient(145deg, var(--theme-accent-soft), var(--theme-surface-raised));border-radius:14px;gap:7px;padding:12px 13px;display:grid}@supports (color:color-mix(in lab, red, red)){html[data-theme] .progress-current-chapter-card{background:linear-gradient(145deg, color-mix(in srgb, var(--theme-accent-soft) 48%, var(--theme-surface-raised)), var(--theme-surface-raised))}}html[data-theme] .progress-current-chapter-card.complete-state{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .progress-current-chapter-card.complete-state{border-color:color-mix(in srgb, var(--theme-success) 30%, var(--theme-border))}}html[data-theme] .progress-current-chapter-card.complete-state{background:var(--theme-success-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .progress-current-chapter-card.complete-state{background:color-mix(in srgb, var(--theme-success-soft) 48%, var(--theme-surface))}}html[data-theme] .progress-current-chapter-heading{justify-content:space-between;align-items:start;gap:12px;display:flex}html[data-theme] .progress-current-chapter-heading>div{gap:2px;min-width:0;display:grid}html[data-theme] .progress-current-chapter-heading span{color:var(--theme-accent-strong);text-transform:uppercase;letter-spacing:.05em;font-size:.58rem;font-weight:900}html[data-theme] .progress-current-chapter-heading strong{color:var(--theme-text);font-size:.78rem;line-height:1.4}html[data-theme] .progress-current-chapter-heading>b{color:var(--theme-accent-strong);flex:none;font-size:.78rem}html[data-theme] .progress-current-chapter-card.complete-state .progress-current-chapter-heading span,html[data-theme] .progress-current-chapter-card.complete-state .progress-current-chapter-heading>b{color:var(--theme-success)}html[data-theme] .progress-current-chapter-card>p{color:var(--theme-text-muted);margin:0;font-size:.65rem;line-height:1.45}html[data-theme] .subject-chapter-launcher.progress-variant{border-color:var(--theme-border);background:var(--theme-surface-soft);min-height:58px;box-shadow:none;margin-top:0}html[data-theme] .subject-chapter-launcher.progress-variant:before{background:var(--theme-progress-fill);width:2px}html[data-theme] .subject-chapter-launcher.progress-variant:hover{border-color:var(--theme-accent-border);background:var(--theme-surface-raised);box-shadow:var(--theme-shadow-sm)}html[data-theme] .subject-chapter-launcher.progress-variant .subject-chapter-launcher-action{color:var(--theme-text-secondary)}html[data-theme] .subject-chapter-launcher.study-variant{margin-top:12px}html[data-theme] .student-subject-card .student-friendly-progress>div{align-items:center;min-height:40px}html[data-theme] .student-subject-card .student-friendly-progress strong{color:var(--theme-text);font-variant-numeric:tabular-nums}@media (max-width:640px){html[data-theme] .progress-overall-heading{flex-direction:column;align-items:start;gap:4px}html[data-theme] .progress-subject-dashboard{border-radius:17px;padding:13px}html[data-theme] .progress-subject-primary-percent{min-width:68px}html[data-theme] .progress-subject-primary-percent strong{font-size:1.25rem}html[data-theme] .progress-subject-metric-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}html[data-theme] .progress-subject-metric-grid>div{border-radius:11px;padding:9px 7px}html[data-theme] .progress-subject-metric-grid span{font-size:.57rem}html[data-theme] .progress-subject-metric-grid strong{font-size:.78rem}html[data-theme] .progress-subject-metric-grid small{font-size:.52rem}html[data-theme] .progress-current-chapter-card{padding:10px 11px}html[data-theme] .subject-chapter-launcher.progress-variant{min-height:54px}}@media (max-width:370px){html[data-theme] .progress-subject-metric-grid{grid-template-columns:1fr 1fr}html[data-theme] .progress-subject-metric-grid>div:last-child{grid-column:1/-1}}html[data-theme] .english-student-subject{border-color:var(--theme-accent-border)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .english-student-subject{border-color:color-mix(in srgb, var(--theme-accent-border) 72%, var(--theme-border))}}html[data-theme] .english-current-study{background:linear-gradient(145deg, var(--theme-accent-soft), var(--theme-surface-soft))}@supports (color:color-mix(in lab, red, red)){html[data-theme] .english-current-study{background:linear-gradient(145deg, color-mix(in srgb, var(--theme-accent-soft) 38%, var(--theme-surface-raised)), var(--theme-surface-soft))}}html[data-theme] .english-lane-launchers,html[data-theme] .english-progress-navigators{gap:8px;display:grid}html[data-theme] .english-paper-blueprint-note{color:var(--theme-text-muted);margin:10px 2px 0;font-size:.64rem;line-height:1.5}html[data-theme] .english-paper-blueprint-note strong{color:var(--theme-text-secondary)}html[data-theme] .english-study-page{gap:18px;display:grid}html[data-theme] .english-study-hero{margin-bottom:0}html[data-theme] .english-study-section{border:1px solid var(--theme-border);background:var(--theme-surface);box-shadow:var(--theme-shadow-sm);border-radius:18px;gap:12px;padding:16px;display:grid}html[data-theme] .english-study-section-heading{justify-content:space-between;align-items:start;gap:14px;display:flex}html[data-theme] .english-study-section-heading>div{gap:4px;display:grid}html[data-theme] .english-study-section-heading h2,html[data-theme] .english-study-section-heading p{margin:0}html[data-theme] .english-study-section-heading>strong{color:var(--theme-accent-strong);flex:none;font-size:.85rem}html[data-theme] .english-study-part-grid,html[data-theme] .english-guided-practice-list,html[data-theme] .english-worked-example-grid{gap:9px;display:grid}html[data-theme] .english-study-part,html[data-theme] .english-guided-practice{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:14px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:12px;padding:13px;display:grid}html[data-theme] .english-study-part.complete,html[data-theme] .english-guided-practice.complete{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .english-study-part.complete,html[data-theme] .english-guided-practice.complete{border-color:color-mix(in srgb, var(--theme-success) 34%, var(--theme-border))}}html[data-theme] .english-study-part.complete,html[data-theme] .english-guided-practice.complete{background:var(--theme-success-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .english-study-part.complete,html[data-theme] .english-guided-practice.complete{background:color-mix(in srgb, var(--theme-success-soft) 46%, var(--theme-surface))}}html[data-theme] .english-study-part>div{gap:4px;display:grid}html[data-theme] .english-study-part span,html[data-theme] .english-guided-practice-heading>span{color:var(--theme-accent-strong);letter-spacing:.05em;text-transform:uppercase;font-size:.59rem;font-weight:900}html[data-theme] .english-study-part strong,html[data-theme] .english-guided-practice strong{color:var(--theme-text)}html[data-theme] .english-study-part p,html[data-theme] .english-study-part small,html[data-theme] .english-guided-practice p{color:var(--theme-text-muted);margin:0;line-height:1.5}html[data-theme] .english-practice-list .question-leaf small,html[data-theme] .english-bank-list .question-leaf small{color:var(--theme-text-muted);margin-top:3px;font-size:.58rem;line-height:1.4;display:block}html[data-theme] .english-extra-practice,html[data-theme] .english-important-bank{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:14px;overflow:clip}html[data-theme] .english-extra-practice>summary,html[data-theme] .english-important-bank>summary{padding:12px 13px}html[data-theme] .english-extra-practice>.question-leaf-list,html[data-theme] .english-important-bank>.english-bank-list,html[data-theme] .english-important-bank>p{margin:0 12px 12px}html[data-theme] .source-defect-card{border-color:var(--theme-warning)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .source-defect-card{border-color:color-mix(in srgb, var(--theme-warning) 45%, var(--theme-border))}}html[data-theme] .source-defect-card{background:var(--theme-warning-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .source-defect-card{background:color-mix(in srgb, var(--theme-warning-soft) 40%, var(--theme-surface))}}html[data-theme] .english-guided-practice{grid-template-columns:1fr}html[data-theme] .english-guided-practice-heading{grid-template-columns:26px minmax(0,1fr);align-items:start;gap:9px;display:grid}html[data-theme] .english-guided-practice-heading>span{background:var(--theme-accent-soft);border-radius:9px;place-items:center;width:26px;height:26px;display:grid}html[data-theme] .english-guided-answer{border-left:2px solid var(--theme-accent);background:var(--theme-surface-raised);border-radius:0 10px 10px 0;padding:10px 12px}html[data-theme] .english-guided-actions{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:8px;display:flex}html[data-theme] .english-skill-method .learning-section,html[data-theme] .english-worked-example-grid .learning-section{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:13px}html[data-theme] .english-skill-method ul{color:var(--theme-text-secondary);margin:8px 0 0;padding-left:20px}html[data-theme] .english-skill-method li+li{margin-top:5px}html[data-theme] .english-checkpoint-ready,html[data-theme] .english-book-checkpoint,html[data-theme] .english-finish-card{margin-top:0}html[data-theme] .english-progress-metrics{grid-template-columns:repeat(4,minmax(0,1fr))}html[data-theme] .english-progress-current-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}@media (prefers-reduced-motion:no-preference){html[data-theme] .english-study-part,html[data-theme] .english-guided-practice{transition:border-color .16s,background-color .16s,transform .16s}html[data-theme] .english-study-part:not(.complete):hover,html[data-theme] .english-guided-practice:not(.complete):hover{transform:translateY(-1px)}}@media (max-width:760px){html[data-theme] .english-progress-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}html[data-theme] .english-progress-current-grid{grid-template-columns:1fr}}@media (max-width:640px){html[data-theme] .english-study-section{border-radius:16px;padding:13px}html[data-theme] .english-study-part{grid-template-columns:1fr}html[data-theme] .english-study-part>button{width:100%}html[data-theme] .english-guided-actions{justify-content:stretch}html[data-theme] .english-guided-actions>button{flex:auto}}html[data-theme] .auth-page-v2{background:radial-gradient(circle at 18% 12%, var(--theme-accent-soft), transparent 34rem), var(--theme-bg);min-height:100vh}@supports (color:color-mix(in lab, red, red)){html[data-theme] .auth-page-v2{background:radial-gradient(circle at 18% 12%, color-mix(in srgb, var(--theme-accent-soft) 60%, transparent), transparent 34rem), var(--theme-bg)}}html[data-theme] .auth-page-v2{color:var(--theme-text)}html[data-theme] .auth-form-panel-v2{background:0 0}html[data-theme] .auth-form-card-v2{border-color:var(--theme-border);background:var(--theme-surface-raised);position:relative;overflow:hidden}@supports (color:color-mix(in lab, red, red)){html[data-theme] .auth-form-card-v2{background:color-mix(in srgb, var(--theme-surface-raised) 94%, transparent)}}html[data-theme] .auth-form-card-v2{box-shadow:var(--theme-shadow-lg);color:var(--theme-text);animation:.5s cubic-bezier(.2,.8,.2,1) both auth-card-arrive}html[data-theme] .auth-form-card-v2:before{content:"";background:linear-gradient(90deg, var(--theme-accent), var(--theme-success));height:3px;position:absolute;inset:0 0 auto}@supports (color:color-mix(in lab, red, red)){html[data-theme] .auth-form-card-v2:before{background:linear-gradient(90deg, var(--theme-accent), color-mix(in srgb, var(--theme-success) 72%, var(--theme-accent)))}}html[data-theme] .auth-mobile-brand-v2{justify-content:space-between;gap:12px}html[data-theme] .auth-mobile-brand-v2>span{border:1px solid var(--theme-border);background:var(--theme-surface-soft);color:var(--theme-text-secondary);border-radius:999px;padding:7px 9px;font-size:.65rem;font-weight:800}html[data-theme] .auth-heading-v2 h2{color:var(--theme-text)}html[data-theme] .auth-heading-v2>p:last-child,html[data-theme] .auth-provider-note,html[data-theme] .auth-privacy-note span{color:var(--theme-text-muted)}html[data-theme] .auth-form label{color:var(--theme-text-secondary)}html[data-theme] .auth-form input{border-color:var(--theme-border);background:var(--theme-surface);color:var(--theme-text)}html[data-theme] .auth-form input:focus{border-color:var(--theme-accent);box-shadow:0 0 0 4px var(--theme-accent)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .auth-form input:focus{box-shadow:0 0 0 4px color-mix(in srgb, var(--theme-accent) 15%, transparent)}}html[data-theme] .auth-form input:disabled{background:var(--theme-surface-soft);color:var(--theme-text-muted)}html[data-theme] .auth-mode-switch{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:16px;grid-template-columns:1fr 1fr;gap:4px;margin-bottom:26px;padding:4px;display:grid}html[data-theme] .auth-mode-switch button{min-height:42px;color:var(--theme-text-muted);cursor:pointer;background:0 0;border:0;border-radius:12px;font-size:.79rem;font-weight:850;transition:background .18s,color .18s,box-shadow .18s,transform .18s}html[data-theme] .auth-mode-switch button:hover:not(:disabled){color:var(--theme-text)}html[data-theme] .auth-mode-switch button.active{background:var(--theme-surface-raised);color:var(--theme-accent-strong);box-shadow:var(--theme-shadow-sm)}html[data-theme] .auth-mode-switch button:disabled{opacity:.58;cursor:not-allowed}html[data-theme] .auth-divider{color:var(--theme-text-muted)}html[data-theme] .auth-divider:before,html[data-theme] .auth-divider:after{background:var(--theme-border)}html[data-theme] .google-button{border-color:var(--theme-border);background:var(--theme-surface);color:var(--theme-text)}html[data-theme] .google-button:hover:not(:disabled){background:var(--theme-surface-soft)}html[data-theme] .google-g{border-color:var(--theme-border);background:var(--theme-surface-raised);color:var(--theme-accent-strong)}html[data-theme] .auth-provider-note{text-align:center;margin-top:9px;font-size:.69rem;line-height:1.45}html[data-theme] .auth-privacy-note{border:1px solid var(--theme-border);background:var(--theme-surface-soft);border-radius:14px;gap:4px;margin-top:20px;padding:12px 13px;display:grid}html[data-theme] .auth-privacy-note strong{color:var(--theme-text-secondary);font-size:.72rem}html[data-theme] .auth-privacy-note span{font-size:.68rem;line-height:1.5}html[data-theme] .auth-notice{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .auth-notice{border-color:color-mix(in srgb, var(--theme-success) 34%, var(--theme-border))}}html[data-theme] .auth-notice{background:var(--theme-success-soft);color:var(--theme-success)}html[data-theme] .auth-error{border-color:var(--theme-danger)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .auth-error{border-color:color-mix(in srgb, var(--theme-danger) 34%, var(--theme-border))}}html[data-theme] .auth-error{background:var(--theme-danger-soft);color:var(--theme-danger)}html[data-theme] .auth-loading{background:var(--theme-bg);color:var(--theme-text-secondary)}html[data-theme] .auth-brand-panel-v2{background:radial-gradient(circle at 74% 22%,#9aa2ff33,#0000 26rem),linear-gradient(145deg,#111629 0%,#1b2342 48%,#252d5c 100%)}html[data-theme] .auth-brand-top{z-index:1;justify-content:space-between;align-items:flex-start;gap:24px;display:flex;position:relative}html[data-theme] .auth-brand-panel-v2 .auth-brand-logo{width:min(300px,66%)}html[data-theme] .auth-brand-panel-v2 .auth-release-pill{flex:none}html[data-theme] .auth-brand-copy-v2{gap:16px;max-width:560px;display:grid}html[data-theme] .auth-brand-copy-v2 h1{max-width:560px;margin-bottom:0;font-size:clamp(2.7rem,4.3vw,4.9rem)}html[data-theme] .auth-benefit-grid{gap:8px;margin-top:8px;display:grid}html[data-theme] .auth-benefit-grid>div{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff0e;border:1px solid #ffffff1a;border-radius:14px;gap:2px;padding:11px 12px;display:grid}html[data-theme] .auth-benefit-grid strong{color:#fff;font-size:.77rem}html[data-theme] .auth-benefit-grid span{color:#cbd0e8;font-size:.71rem;line-height:1.4}html[data-theme] .auth-brand-footnote{z-index:1;color:#aeb6d2;font-size:.72rem;font-weight:700;position:relative}@keyframes auth-card-arrive{0%{opacity:0;transform:translateY(10px)scale(.992)}to{opacity:1;transform:translateY(0)scale(1)}}html[data-theme] .motion-lab-page{background:var(--theme-bg);min-height:100vh;color:var(--theme-text);align-content:start;gap:18px;padding:clamp(18px,4vw,42px);display:grid}html[data-theme] .motion-lab-header,html[data-theme] .motion-lab-callout,html[data-theme] .motion-lab-card,html[data-theme] .motion-lab-inventory{border:1px solid var(--theme-border);background:var(--theme-surface);box-shadow:var(--theme-shadow-sm)}html[data-theme] .motion-lab-header{border-radius:22px;grid-template-columns:auto 1fr auto;align-items:center;gap:18px;padding:18px;display:grid}html[data-theme] .motion-lab-header>img{width:92px;height:auto}html[data-theme] .motion-lab-header h1{margin-bottom:4px;font-size:clamp(1.8rem,4vw,2.7rem)}html[data-theme] .motion-lab-header p:last-child{color:var(--theme-text-muted);font-size:.82rem}html[data-theme] .motion-lab-callout{background:linear-gradient(145deg, var(--theme-accent-soft), var(--theme-surface));border-radius:18px;justify-content:space-between;align-items:center;gap:18px;padding:16px 18px;display:flex}html[data-theme] .motion-lab-callout p{color:var(--theme-text-muted);margin-top:4px;font-size:.77rem}html[data-theme] .motion-lab-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}html[data-theme] .motion-lab-card{border-radius:18px;justify-content:space-between;align-items:flex-end;gap:18px;padding:17px;display:flex}html[data-theme] .motion-lab-card h2{font-size:1rem}html[data-theme] .motion-lab-card p:not(.eyebrow){color:var(--theme-text-muted);font-size:.76rem}html[data-theme] .motion-lab-card .secondary-button,html[data-theme] .motion-lab-header .secondary-button{flex:none;text-decoration:none}html[data-theme] .motion-lab-inventory{border-radius:18px;gap:12px;padding:18px;display:grid}html[data-theme] .motion-lab-inventory ul{color:var(--theme-text-secondary);gap:7px;margin:0;padding-left:20px;font-size:.78rem;line-height:1.5;display:grid}html[data-theme] .motion-lab-note{background:var(--theme-surface-soft);color:var(--theme-text-muted);border-radius:12px;padding:10px 12px;font-size:.72rem}@media (max-width:760px){html[data-theme] .auth-form-card-v2{padding:20px}html[data-theme] .motion-lab-page{padding:14px}html[data-theme] .motion-lab-header{grid-template-columns:auto 1fr}html[data-theme] .motion-lab-header>.secondary-button{text-align:center;grid-column:1/-1;width:100%}html[data-theme] .motion-lab-callout{flex-direction:column;align-items:stretch}html[data-theme] .motion-lab-grid{grid-template-columns:1fr}html[data-theme] .motion-lab-card{flex-direction:column;align-items:stretch}}@media (prefers-reduced-motion:reduce){html[data-theme] .auth-form-card-v2{animation:none!important}}.urdu-academic{text-align:right;letter-spacing:0;direction:rtl;unicode-bidi:plaintext;font-family:Noto Nastaliq Urdu,Noto Naskh Arabic,Segoe UI,serif;line-height:2}.urdu-study-page .urdu-academic h1,.urdu-study-page .urdu-academic h2,.urdu-study-page .urdu-academic h3,.urdu-study-page h1.urdu-academic{line-height:1.7}.urdu-study-section{gap:16px;margin-top:22px;display:grid}.urdu-study-part .urdu-academic{min-width:0}.urdu-study-part ul,.urdu-exam-prep-preview ul{margin:10px 0 0;padding-inline-start:1.4rem}.urdu-practice-grid{gap:12px;display:grid}.urdu-practice-card{border:1px solid var(--border);background:var(--surface);border-radius:18px;grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:16px;padding:16px;display:grid}.urdu-practice-card.complete{box-shadow:inset 0 0 0 1px var(--success)}@supports (color:color-mix(in lab, red, red)){.urdu-practice-card.complete{box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--success) 35%, transparent)}}.urdu-practice-card h3{margin:8px 0 10px;font-size:1.02rem}.urdu-practice-card details{margin-top:10px}.urdu-practice-card summary{cursor:pointer;font-weight:800}.urdu-practice-meta{opacity:.72;direction:ltr;font-family:system-ui,-apple-system,Segoe UI,sans-serif;font-size:.72rem;display:inline-flex}.urdu-checkpoint-card .checkpoint-question-heading{align-items:flex-start}.urdu-checkpoint-card .checkpoint-question-heading .urdu-academic{flex:1;margin:0}.urdu-checkpoint-card .checkpoint-options{gap:8px;display:grid}.urdu-exam-prep-preview{border:1px solid var(--border);background:var(--surface);border-radius:22px;margin-top:22px;padding:20px}.urdu-exam-prep-columns{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:14px;display:grid}.urdu-exam-prep-columns>div{background:var(--surface-soft);border-radius:16px;padding:14px}.urdu-dev-preview{max-width:1180px}@media (max-width:720px){.urdu-practice-card,.urdu-exam-prep-columns{grid-template-columns:1fr}.urdu-academic{line-height:1.9}}html[data-theme] .supporting-study-loop-page{gap:16px}html[data-theme] .supporting-current-step,html[data-theme] .supporting-important-unlock{position:relative;overflow:clip}html[data-theme] .supporting-current-step:before,html[data-theme] .supporting-important-unlock.unlocked:before{content:"";background:var(--theme-accent);width:3px;position:absolute;inset:0 auto 0 0}html[data-theme] .supporting-focus-card{border:1px solid var(--theme-accent);grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:14px;padding:15px;display:grid}@supports (color:color-mix(in lab, red, red)){html[data-theme] .supporting-focus-card{border:1px solid color-mix(in srgb, var(--theme-accent) 28%, var(--theme-border))}}html[data-theme] .supporting-focus-card{background:var(--theme-accent-soft);border-radius:16px}@supports (color:color-mix(in lab, red, red)){html[data-theme] .supporting-focus-card{background:color-mix(in srgb, var(--theme-accent-soft) 28%, var(--theme-surface))}}html[data-theme] .supporting-focus-card h3,html[data-theme] .supporting-focus-card p{margin:0}html[data-theme] .supporting-focus-card>div:first-child{gap:7px;min-width:0;display:grid}html[data-theme] .supporting-step-number{color:var(--theme-accent-strong);letter-spacing:.06em;text-transform:uppercase;font-size:.63rem;font-weight:900}html[data-theme] .supporting-step-actions{justify-items:end;gap:7px;min-width:min(100%,190px);display:grid}html[data-theme] .supporting-step-actions small,html[data-theme] .supporting-pdf-note{color:var(--theme-text-muted);line-height:1.45}html[data-theme] .supporting-step-actions small{text-align:right;max-width:220px;font-size:.66rem}html[data-theme] .supporting-stage-complete{border:1px solid var(--theme-success);justify-content:space-between;align-items:center;gap:12px;padding:14px;display:flex}@supports (color:color-mix(in lab, red, red)){html[data-theme] .supporting-stage-complete{border:1px solid color-mix(in srgb, var(--theme-success) 35%, var(--theme-border))}}html[data-theme] .supporting-stage-complete{background:var(--theme-success-soft);border-radius:14px}@supports (color:color-mix(in lab, red, red)){html[data-theme] .supporting-stage-complete{background:color-mix(in srgb, var(--theme-success-soft) 42%, var(--theme-surface))}}html[data-theme] .supporting-stage-complete span,html[data-theme] .supporting-completed-list span{color:var(--theme-text-muted)}html[data-theme] .supporting-completed-list{gap:7px;padding:12px 14px 14px;display:grid}html[data-theme] .supporting-important-unlock.locked{opacity:.82}html[data-theme] .supporting-important-unlock.unlocked{border-color:var(--theme-success)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .supporting-important-unlock.unlocked{border-color:color-mix(in srgb, var(--theme-success) 35%, var(--theme-border))}}html[data-theme] .supporting-important-unlock.unlocked{background:var(--theme-success-soft)}@supports (color:color-mix(in lab, red, red)){html[data-theme] .supporting-important-unlock.unlocked{background:color-mix(in srgb, var(--theme-success-soft) 18%, var(--theme-surface))}}html[data-theme] .supporting-pdf-button{justify-self:start}html[data-theme] .supporting-source-note>div,html[data-theme] .supporting-answer-guide>div{padding:0 13px 13px}html[data-theme] .supporting-answer-guide{margin:0}@media (max-width:640px){html[data-theme] .supporting-focus-card{grid-template-columns:1fr}html[data-theme] .supporting-step-actions{justify-items:stretch;width:100%;min-width:0}html[data-theme] .supporting-step-actions>button,html[data-theme] .supporting-pdf-button{width:100%}html[data-theme] .supporting-step-actions small{text-align:left;max-width:none}html[data-theme] .supporting-stage-complete{flex-direction:column;align-items:flex-start}}.auth-turnstile{justify-content:center;align-items:center;width:100%;min-height:65px;display:flex;overflow:hidden}.auth-turnstile>div{max-width:100%}.today-task-study-context{display:contents}.today-task-study-banner{border:1px solid var(--border);background:var(--surface);max-width:1120px;box-shadow:var(--shadow-sm);border-radius:18px;justify-content:space-between;align-items:flex-start;gap:18px;margin:0 auto 18px;padding:18px 20px;display:flex}.today-task-study-banner h2{margin:4px 0 6px;font-size:1.05rem}.today-task-study-banner p{margin:0 0 8px}.today-task-study-banner strong{font-size:.9rem}.today-target-status{background:var(--surface-soft);border-radius:999px;flex:none;padding:7px 10px;font-size:.78rem;font-weight:700}.today-study-target{outline:3px solid var(--accent)}@supports (color:color-mix(in lab, red, red)){.today-study-target{outline:3px solid color-mix(in srgb,var(--accent) 34%,transparent)}}.today-study-target{outline-offset:5px;scroll-margin-block:110px;animation:1.1s ease-out 2 today-target-pulse}@keyframes today-target-pulse{0%{outline-width:1px}45%{outline-width:5px}to{outline-width:3px}}@media (max-width:720px){.today-task-study-banner{flex-direction:column;margin:0 14px 14px}.today-target-status{align-self:flex-start}}.today-task-study-actions{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:.7rem;display:flex}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}
