:root{color-scheme:light;--bg: #f7f3ea;--surface: #fffdf8;--surface-strong: #ffffff;--ink: #1f2933;--muted: #667085;--line: #e6ddcf;--brand: #0f766e;--brand-dark: #115e59;--brand-soft: #d9f2ec;--accent: #f59e0b;--danger: #b42318;--shadow: 0 20px 60px rgba(31, 41, 51, .1);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at top left,rgba(245,158,11,.18),transparent 34rem),var(--bg);color:var(--ink)}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.6}.page{width:min(1120px,calc(100% - 32px));margin:0 auto;padding:32px 0 56px}.hero{display:grid;gap:10px;margin-bottom:28px}.hero h1{margin:0;font-size:clamp(2.2rem,6vw,4.8rem);line-height:.95;letter-spacing:-.06em}.hero-copy{max-width:720px;margin:0;color:var(--muted);font-size:1.05rem;line-height:1.6}.eyebrow,.section-kicker{margin:0;color:var(--brand);font-size:.75rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.panel{display:grid;gap:20px;margin-bottom:20px;padding:24px;border:1px solid rgba(230,221,207,.9);border-radius:28px;background:#fffdf8d1;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.panel-heading,.transcript-header,.time-row,.actions-row{display:flex;align-items:center;justify-content:space-between;gap:16px}.panel h2,.transcript-card h3{margin:4px 0 0;font-size:clamp(1.35rem,2vw,1.8rem);line-height:1.1}.chip,.muted{display:inline-flex;align-items:center;min-height:32px;padding:6px 12px;border:1px solid var(--line);border-radius:999px;color:var(--muted);background:#ffffffad;font-size:.84rem;font-weight:700;white-space:nowrap}.drop-zone{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:center;padding:20px;border:1px dashed #b7a88f;border-radius:22px;background:#ffffff85}.drop-icon{display:grid;width:48px;height:48px;place-items:center;border-radius:16px;background:var(--brand-soft);color:var(--brand);font-size:1.8rem;font-weight:800}.drop-zone strong,.drop-zone p{margin:0}.drop-zone p{margin-top:4px;color:var(--muted);line-height:1.5}.file-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.file-button{display:grid;gap:6px;padding:18px;border:1px solid var(--line);border-radius:20px;background:var(--surface-strong);color:var(--ink);text-align:left;transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}.file-button:hover,.file-button:focus-visible{border-color:var(--brand);box-shadow:0 0 0 4px #0f766e1f;outline:none;transform:translateY(-1px)}.file-button.secondary{background:#fff8e8}.file-button span,.file-button small{color:var(--muted);font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.file-button strong{overflow:hidden;font-size:1rem;text-overflow:ellipsis;white-space:nowrap}.player-card{padding:20px;border-radius:24px;background:var(--ink);color:#fffaf2}.play-button{display:grid;width:72px;height:72px;flex:0 0 auto;place-items:center;border:0;border-radius:50%;background:var(--accent);color:var(--ink);font-size:1.8rem;font-weight:900}.time-row{flex:1;align-items:end}#timeDisplay{display:block;margin-bottom:4px;font-variant-numeric:tabular-nums;font-size:1.65rem;font-weight:850}#lessonName{display:block;max-width:48vw;overflow:hidden;color:#fffaf2ad;font-size:.9rem;text-overflow:ellipsis;white-space:nowrap}#progress{width:100%;margin-top:18px;accent-color:var(--accent)}.transcript-card,.bookmark-form,.bookmark-list{border:1px solid var(--line);border-radius:22px;background:#ffffffb8}.transcript-header{padding:16px 16px 0}.transcript-list{display:grid;gap:10px;max-height:320px;margin:14px 0 0;padding:0 16px 16px;overflow:auto;list-style:none}.transcript-cue,.bookmark-button{display:flex;width:100%;align-items:center;gap:12px;padding:13px 14px;border:1px solid transparent;border-radius:16px;background:transparent;color:var(--ink);text-align:left}.transcript-cue:hover,.transcript-cue.active,.bookmark-button:hover{border-color:#0f766e47;background:var(--brand-soft)}.cue-time{flex:0 0 64px;color:var(--brand);font-size:.82rem;font-weight:900;font-variant-numeric:tabular-nums}.cue-text,.bookmark-label{line-height:1.45}.transcript-empty,.bookmark-empty{padding:14px;border-radius:16px;color:var(--muted);background:#ffffffb8}.bookmark-form{display:grid;gap:10px;padding:16px}.bookmark-form label{font-size:.9rem;font-weight:800}.bookmark-input-row{display:grid;grid-template-columns:1fr auto;gap:10px}.bookmark-list{display:grid;gap:10px;margin-top:14px;padding:0;list-style:none}.bookmark-button{justify-content:flex-start}.icon-button{margin-left:auto;padding:8px 10px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--danger);font-size:.8rem;font-weight:800}.primary-btn,.secondary-btn,.ghost-btn,.mini-btn{min-height:44px;border:0;border-radius:999px;padding:0 18px;font-weight:850}.primary-btn{background:var(--brand);color:#fff}.primary-btn:hover,.primary-btn:focus-visible{background:var(--brand-dark);outline:none}.secondary-btn{background:var(--ink);color:#fff}.secondary-btn.alt{background:var(--surface-strong);color:var(--ink)}.ghost-btn,.mini-btn{background:transparent;color:var(--brand-dark)}.mini-btn{min-height:36px;border:1px solid var(--line)}.actions-row{align-items:flex-start}.status{color:var(--muted);font-size:.92rem;line-height:1.5}audio{display:none}@media(max-width:760px){.page{width:min(100% - 20px,1120px);padding-top:18px}.panel{padding:18px;border-radius:22px}.file-row,.bookmark-input-row{grid-template-columns:1fr}.panel-heading,.transcript-header,.time-row{align-items:flex-start;flex-direction:column}.time-row{align-items:stretch}.drop-zone{grid-template-columns:1fr}.transcript-list{max-height:260px}}