.student-splash{min-height:100vh;display:grid;place-items:center;padding:clamp(16px,3vw,28px);background:radial-gradient(1200px 600px at 25% 20%,rgba(62,99,255,.26),transparent 55%),radial-gradient(900px 450px at 75% 70%,rgba(8,191,255,.18),transparent 60%),linear-gradient(145deg,#050b1a,#070f24,#040a17);overflow:hidden}.student-splash:before{content:"";position:fixed;inset:-40%;background:conic-gradient(from 180deg,#3e63ff1a,#08bfff1a,#3e63ff1a);filter:blur(40px);opacity:.8;animation:studentSplashBg 10s linear infinite;pointer-events:none}.student-splash__card{position:relative;width:min(560px,92vw);border-radius:18px;border:1px solid rgba(62,99,255,.22);background:#0a101fc7;box-shadow:0 18px 60px #0000008c,0 0 0 1px #08bfff0f inset;padding:22px 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16px 0 0;overflow:auto}}.student-pending-contract-layer{position:fixed;inset:0;z-index:120;display:grid;place-items:center;padding:16px}.student-pending-contract-backdrop{position:absolute;inset:0;background:#0000008c}.student-pending-contract-card{position:relative;width:min(640px,calc(100vw - 24px));border-radius:18px;border:1px solid rgba(180,214,242,.22);background:#051637eb;box-shadow:0 32px 96px #00000073;overflow:hidden;padding:18px 18px 16px}.student-pending-contract-eyebrow{display:inline-flex;align-items:center;gap:10px;padding:6px 10px;border-radius:999px;background:#f0906129;border:1px solid rgba(240,144,97,.28);color:#ffffffeb;font-size:.85rem;letter-spacing:.02em}.student-pending-contract-card h2{margin:12px 0 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rgba(5,22,55,.95),-1px 0 0 rgba(5,22,55,.95),0 1px 0 rgba(5,22,55,.95),0 -1px 0 rgba(5,22,55,.95),0 2px 0 rgba(5,22,55,.7);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.student-header__brand-text span{display:block;opacity:.72;font-size:.85rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.student-header__nav{display:flex;align-items:center;gap:10px;flex:0 0 auto}.student-header__theme-toggle{display:inline-flex;align-items:center;gap:8px;font-size:.8rem;color:#e5f2f5e0}.student-header__theme-toggle select{border-radius:10px;border:1px solid rgba(180,214,242,.2);background:#0516375c;color:#e5f2f5f5;padding:6px 8px;font:inherit}.student-header__back-btn{padding:6px 10px;border-radius:999px;border:1px solid rgba(180,214,242,.18);background:#05163738;color:#b4d6f2fa;font-weight:800;font-size:.82rem;letter-spacing:.01em;line-height:1;display:inline-flex;align-items:center;gap:6px;justify-content:center;cursor:pointer;-webkit-user-select:none;user-select:none}.student-header__back-icon{width:14px;height:14px;flex:0 0 14px;filter:brightness(0) invert(1)}.student-header__back-btn:hover{border-color:#a78bfa8c;background:#05163752}.student-header__back-btn:focus-visible{outline:3px solid rgba(167,139,250,.55);outline-offset:2px}.student-header__links{display:flex;gap:10px}.student-header__link{padding:8px 10px;border-radius:12px;border:1px solid rgba(180,214,242,.14);background:#05163740;color:#e5f2f5e6;font-weight:600;font-size:.9rem}.student-header__link:hover{border-color:#f0906180}.student-header__menu-btn{display:none;padding:8px 12px;border-radius:12px;border:1px solid rgba(180,214,242,.16);background:#05163740;color:#e5f2f5eb;font-weight:700}.student-header__menu-layer{position:fixed;inset:0;z-index:60}.student-header__menu-backdrop{position:absolute;inset:0;background:#00000059}.student-header__menu{position:absolute;top:64px;right:12px;left:12px;border-radius:16px;border:1px solid rgba(180,214,242,.18);background:#051637eb;box-shadow:0 24px 64px #00000059;overflow:hidden;display:grid}.student-header__menu-item{padding:14px;color:#e5f2f5f5;font-weight:700;border-bottom:1px solid rgba(180,214,242,.12)}.student-header__menu-item:last-child{border-bottom:none}.student-header__menu-item:hover{background:#f090611f}@media(max-width:720px){.student-header{height:60px;max-height:60px;padding:0 12px;gap:10px}.student-header__logo{height:30px}.student-header__left{gap:8px}.student-header__brand-text strong{font-size:.98rem}.student-header__brand-text span,.student-header__links,.student-header__theme-toggle span{display:none}.student-header__menu-btn{display:inline-flex;align-items:center;justify-content:center}}.student-video-player{display:grid;gap:8px;--student-lesson-surface: rgba(10, 16, 30, .72);--student-lesson-surface-elevated: rgba(15, 23, 42, .82);--student-lesson-text: #e6ebf5;--student-lesson-text-muted: rgba(230, 235, 245, .78);--student-lesson-border: rgba(148, 163, 184, .28);--student-lesson-control-bg: rgba(15, 23, 42, .72);--student-lesson-control-hover: rgba(30, 64, 175, .55);--student-lesson-accent: #2563eb;--student-lesson-focus: #f09061;--student-progress-empty-base: rgba(51, 65, 85, .55);--student-progress-empty-stripe: rgba(148, 163, 184, .22);--student-progress-empty-stripe-light: rgba(203, 213, 225, .12);--student-progress-empty-border: rgba(148, 163, 184, .22);--student-progress-complete: linear-gradient(90deg, #22c55e, #4ade80);--student-player-vertical-gap: 240px;--student-player-min-stage-height: 180px;--student-player-width: 60%}.student-video-player.is-engaged{--student-player-width: 80%}.student-video-player__watch-grid{--notes-rail-width: clamp(240px, 18vw, 280px);display:grid;grid-template-columns:minmax(0,1fr) var(--notes-rail-width);gap:14px;width:min(100%,calc(var(--student-player-width) + var(--notes-rail-width) + 14px));margin-inline:auto;align-items:start}.student-video-player__stage{min-width:0;min-height:0}.student-video-player__stage .student-video-player__video-wrap,.student-video-player__stage .student-video-player__embed-stage,.student-video-player__stage .student-video-player__embed iframe{width:100%}.student-video-player__notes-rail{--lesson-note-card-height: 88px;--lesson-note-card-gap: 8px;--lesson-note-visible-count: 3;--lesson-note-list-height: calc(var(--lesson-note-card-height) * var(--lesson-note-visible-count) + var(--lesson-note-card-gap) * (var(--lesson-note-visible-count) - 1));height:var(--lesson-stage-height);min-height:0;max-height:var(--lesson-stage-height);border:1px solid var(--student-lesson-border);border-radius:14px;background:var(--student-lesson-surface);display:grid;grid-template-rows:auto minmax(0,1fr) auto;overflow:hidden}.student-video-player__notes-rail-head,.student-video-player__notes-rail-foot{padding:10px;display:flex;align-items:center;justify-content:space-between;gap:8px}.student-video-player__notes-rail-head strong{color:var(--student-lesson-text)}.student-video-player__notes-rail-head strong span{margin-left:5px;color:var(--student-lesson-text-muted);font-size:.8em}.student-video-player__notes-rail button{border:1px solid var(--student-lesson-border);border-radius:8px;background:var(--student-lesson-control-bg);color:var(--student-lesson-text);padding:6px 8px;cursor:pointer}.student-video-player__notes-rail-head>button{color:#fff;background:var(--student-lesson-accent);border-color:var(--student-lesson-accent)}.student-video-player__notes-rail-list{width:100%;height:100%;max-height:none;min-height:0;padding:0 8px 8px;display:grid;grid-auto-flow:row;grid-auto-rows:calc((100% - (var(--lesson-note-card-gap) * (var(--lesson-note-visible-count) - 1))) / var(--lesson-note-visible-count));align-content:start;gap:var(--lesson-note-card-gap);overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;scrollbar-gutter:stable;scrollbar-width:thin;scroll-snap-type:y proximity;scroll-behavior:smooth}.student-video-player__notes-rail-list::-webkit-scrollbar-track{background:#0f172a8f}.student-video-player__notes-rail-list::-webkit-scrollbar-thumb{background:#94a3b894;border-radius:999px}.student-video-player__notes-rail-list::-webkit-scrollbar-thumb:hover{background:#cbd5e1c2}.student-video-player__note-rail-item{width:100%;height:100%;min-height:0;max-height:none;box-sizing:border-box;text-align:left;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:stretch;gap:6px;padding:7px;scroll-snap-align:center;scroll-snap-stop:normal;overflow:hidden;transition:opacity .18s ease,transform .18s ease,max-height .24s ease,margin .24s ease,padding .24s ease,border-width .24s ease,background-color .18s ease,border-color .18s ease}.student-video-player__note-rail-item.is-removing{height:0;min-height:0;opacity:0;transform:translate(10px);max-height:0;margin-block:0;padding-block:0;border-width:0;pointer-events:none}.student-video-player__note-rail-seek{min-width:0;width:100%;height:100%;overflow:hidden;border:0;background:transparent;color:inherit;padding:2px;text-align:left;cursor:pointer;display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-start;gap:4px}.student-video-player__note-rail-actions{display:grid;grid-template-columns:1fr;grid-template-rows:repeat(3,26px);align-content:center;justify-items:center;align-self:center;width:26px;min-width:26px;flex:0 0 26px;gap:4px}.student-note-viewer{width:min(520px,calc(100vw - 32px));max-height:calc(100dvh - 32px)}.student-note-viewer__content{white-space:pre-wrap;overflow-wrap:anywhere;max-height:min(52vh,420px);overflow-y:auto;line-height:1.6}.student-video-player__note-rail-actions button{width:26px;min-width:26px;min-height:26px;height:26px;padding:0;border-radius:7px;display:inline-grid;place-items:center;border-color:transparent;color:#93c5fd;opacity:.72}.student-video-player__note-rail-actions button:last-child{color:#fda4af}.student-video-player__note-rail-actions svg{width:13px;height:13px}.student-video-player__note-rail-item:hover .student-video-player__note-rail-actions button,.student-video-player__note-rail-item.is-current .student-video-player__note-rail-actions button,.student-video-player__note-rail-actions button:focus-visible{opacity:1}.student-video-player__note-rail-actions button:focus-visible,.student-video-player__note-rail-seek:focus-visible{outline:2px solid var(--student-lesson-focus);outline-offset:2px}.student-video-player__note-rail-actions button:disabled{opacity:.38;cursor:not-allowed}[data-student-theme=light] .student-video-player__note-rail-actions button{color:#2563eb}[data-student-theme=light] .student-video-player__note-rail-actions button:last-child{color:#dc2626}.student-video-player__note-rail-item small{color:var(--student-lesson-accent);font-weight:800}.student-video-player__note-rail-item span{display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere;line-height:1.35}.student-video-player__note-rail-item.is-current{border-left:3px solid var(--student-lesson-accent);background:var(--student-lesson-control-hover)}.student-video-player__note-rail-item.is-new{animation:student-note-new .8s ease}.student-video-player__notes-rail-empty{min-height:0;padding:14px;display:grid;align-content:center;gap:8px;color:var(--student-lesson-text-muted)}.student-video-player__notes-rail-empty strong{color:var(--student-lesson-text)}[data-student-theme=light] .student-video-player__notes-rail-list::-webkit-scrollbar-track{background:#e2e8f0cc}[data-student-theme=light] .student-video-player__notes-rail-list::-webkit-scrollbar-thumb{background:#64748b9e}[data-student-theme=light] .student-video-player__notes-rail-list::-webkit-scrollbar-thumb:hover{background:#475569d1}@media(prefers-reduced-motion:reduce){.student-video-player__notes-rail-list{scroll-behavior:auto}.student-video-player__note-rail-item{transition:none}.student-video-player__note-rail-item.is-new{animation:none}}.student-note-composer__layer{position:fixed;inset:0;z-index:4100;display:grid;place-items:center;padding:16px;background:#020817a3;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.student-note-composer{width:min(520px,100%);display:grid;gap:14px;padding:20px;border-radius:18px;border:1px solid var(--student-lesson-border);background:var(--student-lesson-surface);color:var(--student-lesson-text);box-shadow:0 24px 70px #00000059}.student-note-composer header,.student-note-composer footer{display:flex;justify-content:space-between;gap:10px;align-items:center}.student-note-composer h3,.student-note-composer p{margin:0}.student-note-composer small{color:var(--student-lesson-text-muted)}.student-note-composer textarea{width:100%;box-sizing:border-box;min-height:140px;border-radius:12px;padding:12px;color:var(--student-lesson-text);background:var(--student-lesson-surface-elevated);border:1px solid var(--student-lesson-border);resize:vertical}.student-note-composer button{min-height:40px;border-radius:10px;border:1px solid var(--student-lesson-border);background:var(--student-lesson-control-bg);color:var(--student-lesson-text);padding:8px 12px;cursor:pointer}.student-note-composer footer button:last-child{background:var(--student-lesson-accent);color:#fff;border-color:var(--student-lesson-accent)}@keyframes student-note-new{0%{opacity:.35;transform:translateY(7px) scale(.98)}to{opacity:1;transform:none}}.student-video-player video{width:100%;height:100%;border-radius:0;background:#000;object-fit:contain}.student-video-player__video-wrap{position:relative;width:min(var(--student-player-width),calc(max(var(--student-player-min-stage-height),(100svh - var(--student-player-vertical-gap))) * 16 / 9));aspect-ratio:16 / 9;max-width:100%;max-height:calc(100svh - var(--student-player-vertical-gap));margin-inline:auto;border-radius:10px;overflow:hidden;background:#000}.student-video-player__paused-cover{position:absolute;inset:0;border-radius:10px;overflow:hidden;pointer-events:none;background:#000}.student-video-player__paused-cover img{width:100%;height:100%;object-fit:contain}.student-video-player__center-play{position:absolute;inset:0;margin:auto;width:64px;height:64px;border-radius:999px;border:1px solid rgba(180,214,242,.4);background:#051637ad;color:#fff;font-size:1.6rem;line-height:1;display:grid;place-items:center;cursor:pointer;z-index:4;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.student-video-player__center-play:hover{background:#081f49d1;border-color:#f0906199}.student-video-player__embed{display:grid;gap:6px}.student-video-player__embed-stage{position:relative;width:min(var(--student-player-width),calc(max(var(--student-player-min-stage-height),(100svh - var(--student-player-vertical-gap))) * 16 / 9));aspect-ratio:16 / 9;max-width:100%;max-height:calc(100svh - var(--student-player-vertical-gap));margin-inline:auto;border-radius:10px;overflow:hidden;background:#000}.student-video-player__embed-stage>div,.student-video-player__embed-stage iframe{width:100%;height:100%}.student-video-player__embed iframe{width:min(var(--student-player-width),calc(max(var(--student-player-min-stage-height),(100svh - var(--student-player-vertical-gap))) * 16 / 9));aspect-ratio:16 / 9;max-width:100%;max-height:calc(100svh - var(--student-player-vertical-gap));margin-inline:auto;display:block;border-radius:10px;background:#000;border:0}@media(max-width:1119px){.student-video-player{--student-player-vertical-gap: 220px;--student-player-min-stage-height: 160px;--student-player-width: 88%}.student-video-player.is-engaged{--student-player-width: 100%}.student-video-player__watch-grid{width:100%;grid-template-columns:1fr}.student-video-player__notes-rail{height:clamp(230px,42vh,320px);min-height:0;max-height:clamp(230px,42vh,320px)}}@media(max-width:640px){.student-video-player__progress-footer{align-items:stretch;flex-direction:column}.student-video-player__complete-action{justify-content:flex-end}.student-video-player__notes-rail{--lesson-note-card-height:84px;--lesson-note-card-gap:8px;--lesson-note-visible-count:2;height:min(300px,46vh);max-height:min(300px,46vh)}.student-video-player__note-rail-actions{grid-template-columns:1fr;grid-template-rows:repeat(3,26px);gap:4px}.student-video-player{--student-player-width: 94%;--student-player-vertical-gap: 190px}.student-video-player.is-engaged{--student-player-width: 100%}}.student-video-player__video-wrap,.student-video-player__embed-stage,.student-video-player__embed iframe{transition:width .38s cubic-bezier(.2,.8,.2,1)}.student-video-player__embed-link{color:#a78bfaf2;font-size:.86rem;text-decoration:none;width:fit-content}.student-video-player__embed-link:hover{text-decoration:underline}.student-video-player__toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.student-video-player__status{display:grid;gap:2px}.student-video-player__toolbar small{color:#e6ebf5d1}.student-video-player__warning{color:#fbbf24}.student-video-player__controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.student-video-player__play-toggle,.student-video-player__rates button,.student-video-player__next-btn{min-height:40px;border:1px solid var(--student-lesson-border);background:var(--student-lesson-control-bg);color:var(--student-lesson-text);border-radius:11px;padding:8px 12px;font-size:.78rem;font-weight:750;cursor:pointer;transition:background .16s ease,border-color .16s ease,color .16s ease}.student-video-player__play-toggle{display:inline-flex;align-items:center;gap:7px}.student-video-player__rates{display:inline-flex;overflow:hidden;border:1px solid var(--student-lesson-border);border-radius:11px}.student-video-player__rates button{min-width:48px;border:0;border-radius:0;padding-inline:10px}.student-video-player__rates button+button{border-left:1px solid var(--student-lesson-border)}.student-video-player__rates button[aria-pressed=true]{color:#fff;background:var(--student-lesson-accent)}.student-video-player__play-toggle:hover,.student-video-player__rates button:hover:not([aria-pressed=true]),.student-video-player__next-btn:hover{border-color:var(--student-lesson-accent);background:var(--student-lesson-control-hover)}.student-video-player__play-toggle:focus-visible,.student-video-player__rates button:focus-visible,.student-video-player__next-btn:focus-visible{outline:3px solid var(--student-lesson-focus);outline-offset:2px}.student-video-player__next-btn{border-color:var(--student-lesson-accent);background:var(--student-lesson-accent);color:#fff;font-weight:700;display:inline-flex;align-items:center;gap:6px}.student-video-player__progress{width:100%;height:8px;border-radius:999px;background:repeating-linear-gradient(135deg,var(--student-progress-empty-stripe) 0,var(--student-progress-empty-stripe) 8px,var(--student-progress-empty-stripe-light) 8px,var(--student-progress-empty-stripe-light) 16px),var(--student-progress-empty-base);border:1px solid var(--student-progress-empty-border);box-shadow:inset 0 1px 2px #0f172a59,0 1px 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rgba(74,222,128,.32);background:#16a34a1f;color:#bbf7d0;font:inherit;font-weight:700;line-height:1;box-shadow:none;cursor:pointer;transition:background-color .16s ease,border-color .16s ease,color .16s ease,transform .16s ease}.student-video-player__complete-btn svg{width:17px;height:17px;flex:0 0 auto}.student-video-player__complete-btn:hover:not(:disabled){background:#16a34a33;border-color:#4ade8080;color:#dcfce7;transform:translateY(-1px)}.student-video-player__complete-btn:active:not(:disabled){transform:translateY(0)}.student-video-player__complete-btn:focus-visible{outline:3px solid var(--student-lesson-focus);outline-offset:3px}.student-video-player__complete-btn.is-completed,.student-video-player__complete-btn:disabled{border-color:#4ade8038;background:#16a34a14;color:#bbf7d0c7;opacity:1;cursor:default}[data-student-theme=light] .student-video-player__complete-btn{border-color:#bbf7d0;background:#f0fdf4;color:#166534}[data-student-theme=light] 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span{color:#e5f2f5b8;font-size:.85rem}.student-platform-shell__topbar button{border-radius:12px}.student-platform-shell__topbar-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.student-platform-shell__topbar-actions .unyom-button{border-radius:999px;padding:7px 12px;font-size:.85rem;border:1px solid rgba(62,99,255,.22);background:#0516379e}@media(max-width:720px){.student-platform-shell__topbar{flex-direction:column;align-items:flex-start;gap:12px}.student-platform-shell .unyom-card{padding:16px}}.student-platform-shell__card{max-width:560px;margin:70px auto 0;border:1px solid rgba(62,99,255,.24);border-radius:14px;background:#0e1528d9;padding:20px}.student-platform-shell__card h1{margin:0 0 8px;color:#fff;font-size:1.2rem}.student-platform-shell__card p{margin:0;color:#e6ebf5c7}.student-platform-shell__error{color:#fecaca!important}.student-platform-shell__feedback-alert{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 14px;border-radius:12px;border:1px solid rgba(59,130,246,.35);background:linear-gradient(135deg,#0f172ae0,#1e3a8a75)}.student-platform-shell__feedback-alert strong{display:block}.student-platform-shell__feedback-alert p{margin:4px 0 0;opacity:.8;font-size:.9rem}@media(max-width:720px){.student-platform-shell__feedback-alert{flex-direction:column;align-items:flex-start}}[data-student-theme=light]{color:#0f172a;background:radial-gradient(circle at 10% -10%,rgba(240,144,97,.09) 0%,transparent 42%),radial-gradient(circle at 110% 10%,rgba(75,135,199,.12) 0%,transparent 48%),linear-gradient(180deg,#f5f8fc,#edf2f9)}[data-student-theme=light] .student-header{border-bottom-color:#0f172a1f;background:#ffffffe6}[data-student-theme=light] .student-header__brand-text strong,[data-student-theme=light] .student-header__link,[data-student-theme=light] .student-header__menu-btn,[data-student-theme=light] .student-header__back-btn,[data-student-theme=light] 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.student-quiz-card{background:#fff;border-color:#0f172a24;color:#0f172a}[data-student-theme=light] .student-video-player__status,[data-student-theme=light] .student-video-player__rates,[data-student-theme=light] .student-lesson__notes-head,[data-student-theme=light] .student-lesson-notes-modal__title h3,[data-student-theme=light] .student-quiz-meta,[data-student-theme=light] .student-quiz-question__statement{color:#0f172a}[data-student-theme=light] .student-video-player,[data-student-theme=light] .student-video-player *:not(.unyom-button),[data-student-theme=light] .student-lesson__notes,[data-student-theme=light] .student-lesson-notes-modal__card{color:#0f172a}[data-student-theme=light] .student-video-player small,[data-student-theme=light] .student-video-player__warning,[data-student-theme=light] .student-lesson__notes-empty,[data-student-theme=light] .student-lesson__notes-closest-label,[data-student-theme=light] .student-lesson-notes-modal__title small,[data-student-theme=light] 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.student-lesson-notes-modal__editor textarea::placeholder,[data-student-theme=light] .student-video-player__notes-editor input::placeholder,[data-student-theme=light] .student-lesson-notes-modal__editor input::placeholder{color:#0f172a7a}[data-student-theme=light] .student-lesson__note-item,[data-student-theme=light] .student-lesson-notes-modal__item{background:#f8fbff;border-color:#0f172a24;color:#0f172a}[data-student-theme=light] .student-video-player__progress{--student-progress-empty-base: #e2e8f0;--student-progress-empty-stripe: rgba(203, 213, 225, .58);--student-progress-empty-stripe-light: rgba(241, 245, 249, .9);--student-progress-empty-border: rgba(100, 116, 139, .2);--student-progress-complete: linear-gradient(90deg, #16a34a, #22c55e);box-shadow:inset 0 1px 2px #0f172a1a,0 1px #fffc}[data-student-theme=light] .student-video-player{--student-light-text-strong: #1f2937;--student-light-text-default: #334155;--student-light-text-secondary: #526174;--student-light-text-muted: #64748b;--lesson-page-bg: #f1f5f9;--lesson-surface-1: #ffffff;--lesson-surface-2: #f8fafc;--lesson-surface-3: #f1f5f9;--lesson-text: var(--student-light-text-strong);--lesson-text-muted: var(--student-light-text-muted);--lesson-border-subtle: rgba(15, 23, 42, .09);--lesson-border-default: rgba(15, 23, 42, .14);--lesson-shadow-soft: 0 1px 2px rgba(15, 23, 42, .04), 0 8px 24px rgba(15, 23, 42, .05);--student-lesson-surface: var(--lesson-surface-1);--student-lesson-surface-elevated: var(--lesson-surface-2);--student-lesson-text: var(--lesson-text);--student-lesson-text-muted: var(--lesson-text-muted);--student-lesson-border: var(--lesson-border-default);--student-lesson-control-bg: #ffffff;--student-lesson-control-hover: #eaf1ff;--student-lesson-accent: #2563eb;--student-lesson-focus: #c2410c;color:var(--lesson-text);background:linear-gradient(145deg,#fffffff5,#f7f9fcf0);border:1px solid var(--lesson-border-subtle);border-radius:20px;box-shadow:var(--lesson-shadow-soft);padding:12px}[data-student-theme=light] .student-video-player__notes-rail-head strong,[data-student-theme=light] .student-video-player__status,[data-student-theme=light] .student-lesson-study-actions__copy strong{color:var(--student-light-text-strong)}[data-student-theme=light] .student-video-player__note-rail-seek,[data-student-theme=light] .student-lesson-study-actions__copy>span,[data-student-theme=light] .student-video-player__progress-legend{color:var(--student-light-text-secondary)}[data-student-theme=light] .student-video-player__notes-rail-head>button,[data-student-theme=light] .student-video-player__notes-rail-head>button:hover,[data-student-theme=light] .student-video-player__next-btn,[data-student-theme=light] .student-video-player__next-btn:hover,[data-student-theme=light] .student-video-player__rates button[aria-pressed=true]{color:#fff}[data-student-theme=light] .student-video-player__rates button:not([aria-pressed=true]){color:var(--student-light-text-default)}[data-student-theme=light] .student-note-composer{color:var(--student-light-text-default)}[data-student-theme=light] .student-note-composer h3{color:var(--student-light-text-strong)}[data-student-theme=light] .student-video-player__stage{background:linear-gradient(180deg,#eef2f7,#e8edf4);border:1px solid rgba(15,23,42,.1);border-radius:16px;box-shadow:0 1px 2px #0f172a0f,0 12px 32px #0f172a14;overflow:hidden}[data-student-theme=light] .student-video-player__notes-rail{background:linear-gradient(180deg,#fbfcfe,#f5f8fc);border-color:#0f172a1a;box-shadow:var(--lesson-shadow-soft)}[data-student-theme=light] .student-video-player__notes-rail-head{background:linear-gradient(180deg,#fffffff0,#f8fafcf0);border-bottom:1px solid rgba(15,23,42,.07)}[data-student-theme=light] .student-video-player__note-rail-item{background:#ffffffe0;border-color:#0f172a1c;box-shadow:0 1px 2px #0f172a09}[data-student-theme=light] .student-video-player__note-rail-item:hover{background:#fff;border-color:#2563eb38;box-shadow:0 6px 16px #0f172a12}[data-student-theme=light] .student-video-player__note-rail-item.is-current{background:linear-gradient(135deg,#edf4ff,#f5f8ff);border-color:#2563eb52;box-shadow:inset 3px 0 #2563eb,0 5px 16px #2563eb17}[data-student-theme=light] .student-video-player__toolbar{background:linear-gradient(180deg,#fffffff0,#f7f9fcf0);border-color:#0f172a17;box-shadow:0 4px 18px #0f172a0d}[data-student-theme=light] .student-video-player__progress{background:repeating-linear-gradient(135deg,#cbd5e17a 0 7px,#f8fafcd1 7px 14px),#e2e8f0;border-color:#64748b29}[data-student-theme=light] .student-note-composer{background:linear-gradient(180deg,#fff,#fafbfd);border-color:#0f172a1c;box-shadow:0 28px 80px #0f172a33}[data-student-theme=light] .student-lesson-study-actions{border-color:#2563eb1f;background:linear-gradient(135deg,#fffffffa,#f4f8fff2);box-shadow:0 1px 2px #0f172a0a,0 12px 28px #0f172a0e}[data-student-theme=light] .student-lesson-study-actions__copy strong,[data-student-theme=light] .student-lesson-study-actions__copy p,[data-student-theme=light] .student-lesson__notes-empty strong{color:#0f172a}[data-student-theme=light] .student-lesson-study-actions__cta{color:#1e3a8a;border-color:#2563eb2e;background:#f8fbff}[data-student-theme=light] .student-lesson-study-actions__cta{color:#1d4ed8;background:#eff6ffdb;border-color:#2563eb2b}[data-student-theme=light] .student-lesson-study-actions:hover:not(:disabled){background:linear-gradient(135deg,#fff,#eef5ff);border-color:#2563eb47;box-shadow:0 2px 5px #0f172a0d,0 14px 30px #2563eb14}[data-student-theme=dark] .student-lesson-study-actions__cta{color:#dbeafe;background:#0f1f3d8c;border-color:#93c5fd33}[data-student-theme=light] .student-lesson-study-actions__icon{color:#334155;background:linear-gradient(135deg,#f1f5f9,#e8eef6);border:1px solid rgba(51,65,85,.12)}[data-student-theme=dark] .student-lesson-study-actions__icon{color:#f8fafc;background:linear-gradient(135deg,#4f46e552,#2563eb38);border:1px solid rgba(148,163,184,.16)}[data-student-theme=light] .student-back-btn{color:#334155;background:#f1f5f9;border-color:#33415521}[data-student-theme=light] .student-feedback-button.is-duvida{color:#1d4ed8;background:linear-gradient(145deg,#f5f9ff,#edf4ff);border:1px solid rgba(37,99,235,.15)}[data-student-theme=light] .student-feedback-button.is-comentario{color:#15803d;background:linear-gradient(145deg,#f5fff8,#ecfdf3);border:1px solid rgba(22,163,74,.15)}[data-student-theme=dark] .student-back-btn{color:#e2e8f0;background:#1e2f4eb8;border-color:#94a3b82e}[data-student-theme=dark] .student-feedback-button.is-duvida{color:#93c5fd;background:#2563eb21;border:1px solid rgba(96,165,250,.2)}[data-student-theme=dark] .student-feedback-button.is-comentario{color:#86efac;background:#16a34a1f;border:1px solid rgba(74,222,128,.19)}[data-student-theme=light] .student-lesson-header{background:linear-gradient(145deg,#fffffff7,#f5f8fcf2);border:1px solid rgba(51,65,85,.1);box-shadow:0 1px 2px #0f172a0a,0 12px 30px #0f172a0e}[data-student-theme=light] .student-lesson-header__back{color:#0369a1;background:#f0f9ff;border:1px solid rgba(14,165,233,.18)}[data-student-theme=light] .student-lesson-header__action--question{color:#1d4ed8;background:#eff6ff;border:1px solid rgba(37,99,235,.16)}[data-student-theme=light] .student-lesson-header__action--praise{color:#15803d;background:#f0fdf4;border:1px solid rgba(22,163,74,.17)}[data-student-theme=dark] .student-lesson-header{background:linear-gradient(145deg,#0f1e3ae0,#0a1830b8);border:1px solid rgba(148,163,184,.12);box-shadow:0 1px 2px #0000002e,0 14px 34px #00000024}[data-student-theme=dark] .student-lesson-header__back{color:#7dd3fc;background:#1e2f4ebf;border:1px solid rgba(125,211,252,.2)}[data-student-theme=dark] .student-lesson-header__action--question{color:#93c5fd;background:#2563eb24;border:1px solid rgba(96,165,250,.23)}[data-student-theme=dark] .student-lesson-header__action--praise{color:#86efac;background:#16a34a21;border:1px solid rgba(74,222,128,.22)}[data-student-theme=light] .student-video-player__notes-rail-list{scrollbar-color:rgba(100,116,139,.46) rgba(226,232,240,.5)}[data-student-theme=light] .student-video-player__notes-rail-list::-webkit-scrollbar-track{background:#e2e8f08a;border-radius:999px}[data-student-theme=light] .student-video-player__notes-rail-list::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#94a3b8b8,#64748b94);border:2px solid rgba(241,245,249,.8);border-radius:999px}[data-student-theme=dark] .student-video-player__notes-rail-list{scrollbar-color:rgba(148,163,184,.52) rgba(15,30,58,.26)}[data-student-theme=dark] .student-video-player__notes-rail-list::-webkit-scrollbar-track{background:#0f1e3a52;border-radius:999px}[data-student-theme=dark] .student-video-player__notes-rail-list::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#94a3b8ad,#64748b9e);border:2px solid rgba(15,30,58,.32);border-radius:999px}[data-student-theme=light] .student-video-player__notes-rail-head>button,[data-student-theme=light] .student-video-player__next-btn{background:#2563eb;border-color:#2563eb;color:#fff}[data-student-theme=light] .student-video-player__notes-rail-head>button:hover:not(:disabled),[data-student-theme=light] .student-video-player__next-btn:hover:not(:disabled){background:#1d4ed8;border-color:#1d4ed8;color:#fff}[data-student-theme=light] .student-video-player__notes-rail-head>button:active:not(:disabled),[data-student-theme=light] .student-video-player__next-btn:active:not(:disabled){background:#1e40af;border-color:#1e40af;color:#fff}[data-student-theme=light] .student-video-player__next-btn span,[data-student-theme=light] .student-video-player__next-btn svg{color:inherit}[data-student-theme=light] 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.student-module-materials-modal__close{color:#0f172a;border-color:#0f172a29;background:#f8fbff}[data-student-theme=light] .student-notebook__sidebar,[data-student-theme=light] .student-notebook__mobilebar{background:#f8fbff;border-color:#0f172a1f}[data-student-theme=light] .student-vitrine__course-overlay strong{text-shadow:none}[data-student-theme=light] .student-vitrine__help small,[data-student-theme=light] .student-vitrine__help .unyom-button.student-vitrine__whatsapp,[data-student-theme=light] .student-vitrine__help .unyom-button.student-vitrine__whatsapp:visited,[data-student-theme=light] .student-vitrine__help .unyom-button.student-vitrine__whatsapp:hover,[data-student-theme=light] .student-vitrine__help .unyom-button.student-vitrine__whatsapp:active,[data-student-theme=light] .student-vitrine__help .unyom-button.student-vitrine__whatsapp:focus-visible{color:#166534!important}[data-student-theme=light] .student-vitrine__whatsapp img,[data-student-theme=light] 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ease}.student-vitrine-modal{position:relative;z-index:1;width:min(680px,calc(100% - 24px));max-height:min(88vh,920px);background:linear-gradient(180deg,#0f172afa,#0b172afa);color:#e6edf7;border:1px solid rgba(148,163,184,.24);border-radius:22px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 26px 80px #02061785,0 8px 28px #0f172a47;animation:student-modal-card-in .26s cubic-bezier(.2,.8,.2,1)}.student-vitrine-modal:before{content:"";position:absolute;inset:0 0 auto;height:140px;pointer-events:none;background:radial-gradient(circle at 12% 0%,rgba(240,144,97,.24) 0%,transparent 42%),radial-gradient(circle at 88% 0%,rgba(96,165,250,.18) 0%,transparent 38%);opacity:.95}.student-vitrine-modal__header{position:relative;padding:20px 22px 16px;border-bottom:1px solid rgba(148,163,184,.12);background:linear-gradient(180deg,#ffffff08,#fff0)}.student-vitrine-modal__body{position:relative;padding:18px 22px 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