/* Scoped to the approved student screens and student navigation only. */
.student-library,.student-learning,.assistant-workspace{--brand:#205740;--brand-dark:#153d2d;--brand-deep:#153d2d;--brand-soft:#e9eee5;--ink:#162b25;--ink-soft:#5c6963;--line:#d4dad2;--paper:#f8f7f3;--surface-muted:#f0f2eb;color:var(--ink);}
.student-shell>.app-sidebar{background:#f8f7f3;border-color:#d4dad2;}
.student-shell .sidebar-brand strong{font-family:'Source Serif 4',Georgia,serif;color:#162b25;letter-spacing:.03em;font-size:1.55rem;font-weight:500;}
.student-shell .sidebar-brand .brand-mark{background:#205740;}
.student-shell .sidebar-nav .nav-item{min-height:48px;border-radius:6px;}
.student-shell .sidebar-nav .nav-item.active{background:#e9eee5;color:#153d2d;box-shadow:none;border-color:transparent;}
.student-library,.student-learning{background:#f8f7f3;padding:8px 0 32px;min-height:65vh;}
.student-shell .app-main:has(.student-library),.student-shell .app-main:has(.student-learning),.student-shell .app-main:has(.assistant-workspace){background:#f8f7f3;}
.student-screen-head{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:28px;}
.student-screen-head h1{font-size:clamp(2.1rem,3.3vw,3.3rem);font-weight:500;letter-spacing:-.025em;margin:0 0 6px;}
.student-screen-head p{margin:0;color:var(--ink-soft);font-size:1.15rem;}
.student-library .button,.student-learning .button,.assistant-workspace .button{border-radius:5px;box-shadow:none;}
.student-library .primary,.student-learning .primary,.assistant-workspace .primary{background:#205740;border-color:#205740;color:white;}
.student-library .primary:hover,.student-learning .primary:hover,.assistant-workspace .primary:hover{background:#153d2d;}
.student-library :focus-visible,.student-learning :focus-visible,.assistant-workspace :focus-visible{outline:3px solid #367456;outline-offset:3px;}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important;}
.library-search{display:grid;grid-template-columns:minmax(0,3fr) repeat(2,minmax(130px,1fr));gap:14px;}
.library-search .field{height:49px;background:#fff;}
.library-search>*{min-width:0;}
.library-secondary{display:flex;gap:14px;align-items:center;border-top:1px solid var(--line);padding-top:20px;margin:24px 0 20px;}
.library-secondary h2{margin:0 auto 0 0;font-size:1.55rem;font-weight:500;}
.library-secondary select{max-width:220px;}
.student-lesson-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px 20px;}
.student-lesson-grid>.empty{grid-column:1/-1;}
.student-lesson-tile{min-width:0;}
.lesson-tile-open{display:block;width:100%;padding:0;border:0;background:none;color:inherit;text-align:left;cursor:pointer;}
.lesson-tile-open:hover h3{text-decoration:underline;text-underline-offset:4px;}
.lesson-tile-open h3{font-size:1.45rem;font-weight:500;margin:4px 0 7px;overflow-wrap:anywhere;}
.lesson-subject{display:block;font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:#30513f;margin-top:12px;overflow-wrap:anywhere;}
.lesson-tile-meta{font-size:.85rem;color:var(--ink-soft);display:flex;gap:9px;align-items:center;flex-wrap:wrap;overflow-wrap:anywhere;}
.subtitle-label{padding:2px 7px;border-radius:3px;background:#e9ece5;color:#42534b;font-size:.72rem;}
.lesson-visual{position:relative;aspect-ratio:16/9;background:#e1e8dc;overflow:hidden;border-radius:5px;isolation:isolate;}
.lesson-visual img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1;}
.lesson-art{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;overflow:hidden;color:#346047;}
.lesson-art span{font-family:'Source Serif 4',serif;font-size:clamp(1.1rem,2vw,1.8rem);z-index:1;text-align:center;width:85%;overflow-wrap:anywhere;}
.lesson-art i{position:absolute;border:1px solid currentColor;opacity:.22;width:62%;height:62%;left:19%;top:19%;transform:rotate(25deg);}
.lesson-art i:nth-child(2){transform:rotate(65deg);}.lesson-art i:nth-child(3){transform:rotate(105deg);}
.visual-math{background-color:#e9e4d4;background-image:linear-gradient(#b7bca333 1px,transparent 1px),linear-gradient(90deg,#b7bca333 1px,transparent 1px);background-size:22px 22px;}
.visual-math .lesson-art i{border-radius:50%;width:110%;height:90%;left:-5%;top:30%;transform:rotate(-25deg);}
.visual-math .lesson-art i:nth-child(2){top:50%;}.visual-math .lesson-art i:nth-child(3){top:70%;}
.visual-physics{background:#dadbd2;}.visual-physics .lesson-art i{border-radius:50%;width:34%;height:60%;left:12%;}.visual-physics .lesson-art i:nth-child(2){left:34%;}.visual-physics .lesson-art i:nth-child(3){left:56%;}
.visual-chemistry{background:#213e32;}.visual-chemistry .lesson-art{color:#e0d29d;}.visual-chemistry .lesson-art i{border-radius:50%;height:30%;top:35%;opacity:.5;}
.visual-biology{background:#d6e3cd;}.visual-biology .lesson-art i{border-radius:0 80% 0 80%;}
.visual-language{background:#eee7d9;}.visual-language .lesson-art i{height:1px;transform:rotate(-12deg);width:120%;left:-10%;top:23%;}.visual-language .lesson-art i:nth-child(2){top:50%;}.visual-language .lesson-art i:nth-child(3){top:77%;}
.lesson-play,.lesson-duration{position:absolute;z-index:2;bottom:12px;background:#17382de8;color:white;}
.lesson-play{left:12px;width:34px;height:34px;border:1px solid white;border-radius:50%;display:grid;place-content:center;font-size:13px;}
.lesson-duration{right:10px;border-radius:3px;font-size:.75rem;padding:1px 6px;}
.learning-feature{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:white;margin-bottom:26px;}
.learning-image-open{display:block;min-width:0;background:none;border:0;padding:0;text-align:left;cursor:pointer;}
.learning-feature>.learning-image-open>.lesson-visual{height:100%;min-height:300px;border-radius:0;aspect-ratio:auto;}
.learning-feature .lesson-play{top:50%;left:50%;bottom:auto;transform:translate(-50%,-50%);width:68px;height:68px;font-size:25px;}
.learning-feature .lesson-art span{align-self:flex-start;padding-top:32px;}
.learning-feature-copy{padding:28px;min-width:0;}
.learning-feature-copy>.lesson-subject{margin-top:0;}
.learning-feature-copy h2{font-size:clamp(1.65rem,2.5vw,2.6rem);font-weight:500;overflow-wrap:anywhere;margin:12px 0;}
.learning-feature-copy p{overflow-wrap:anywhere;}
.playback-position{display:flex;gap:16px;align-items:center;margin:18px 0;font-size:.8rem;color:var(--ink-soft);}
.playback-position progress{flex:1;min-width:30px;width:100%;height:8px;border:0;border-radius:9px;overflow:hidden;appearance:none;accent-color:#205740;}
.playback-position progress::-webkit-progress-bar{background:#e0e6df;border-radius:9px;}.playback-position progress::-webkit-progress-value{background:#205740;border-radius:9px;}.playback-position progress::-moz-progress-bar{background:#205740;}
.playback-position span{white-space:nowrap;}
.learning-tabs{display:flex;gap:20px;border-bottom:1px solid var(--line);overflow:auto;}
.learning-tabs button{background:none;border:0;border-bottom:3px solid transparent;padding:14px 10px;color:var(--ink-soft);white-space:nowrap;cursor:pointer;}
.learning-tabs button[aria-pressed=true]{color:#153d2d;border-color:#205740;}
.learning-row{display:grid;grid-template-columns:210px minmax(0,1fr) auto;align-items:center;gap:25px;padding:20px 0;border-bottom:1px solid var(--line);}
.learning-row h2{font-size:1.5rem;margin:3px 0;font-weight:500;overflow-wrap:anywhere;}.learning-row p{margin:4px 0;overflow-wrap:anywhere;}.learning-row .lesson-subject{margin:0;}.learning-row .playback-position{margin:10px 0 0;max-width:560px;}
.learning-row .lesson-art span{display:none;}
.learning-empty{padding:28px 0;color:var(--ink-soft);}
@media(max-width:1200px){.student-lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr));}.learning-row{grid-template-columns:160px minmax(0,1fr) auto;gap:16px;}}
@media(max-width:720px){.student-screen-head{align-items:flex-start;flex-wrap:wrap;gap:16px;}.student-screen-head h1{font-size:2.1rem;}.student-screen-head p{font-size:1rem;}.library-search{grid-template-columns:1fr 1fr;}.library-search>label:first-child{grid-column:1/-1;}.library-secondary{flex-wrap:wrap;gap:10px;}.library-secondary h2{flex-basis:100%;}.library-secondary label{flex:1;min-width:0;}.library-secondary select{width:100%;max-width:none;}.learning-feature{grid-template-columns:1fr;}.learning-feature>.lesson-visual{min-height:0;aspect-ratio:16/9;}.learning-feature-copy{padding:20px;}.learning-row{grid-template-columns:100px minmax(0,1fr);gap:14px;}.learning-row>.button{grid-column:2;justify-self:start;}.learning-row h2{font-size:1.2rem;}.learning-row .playback-position{flex-wrap:wrap;gap:5px;}.learning-tabs{gap:4px;font-size:.85rem;}.learning-tabs button{padding:12px 7px;}}
@media(max-width:480px){.student-lesson-grid{grid-template-columns:1fr;}.lesson-art span{font-size:1.8rem;}}
@media(max-width:720px){.learning-feature>.learning-image-open>.lesson-visual{min-height:0;aspect-ratio:16/9;}}