:root{color-scheme:dark;--bg: #08090b;--surface: #111318;--surface-2: #171a21;--border: #262a33;--text: #f4f4f5;--muted: #a1a1aa;--soft: #71717a;--accent: #8dd7c8;--accent-strong: #c7fff3;--danger: #fb7185;--radius: 8px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,SF Pro Display,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0;min-width:320px;background:radial-gradient(circle at top,rgba(141,215,200,.08),transparent 34rem),var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}button,input{font:inherit}button{min-height:40px;border:1px solid var(--border);border-radius:var(--radius);background:var(--text);color:#09090b;cursor:pointer;font-weight:650}button.secondary{background:var(--surface-2);color:var(--text)}button:disabled{cursor:not-allowed;opacity:.55}input{width:100%;min-height:44px;border:1px solid var(--border);border-radius:var(--radius);background:#0d0f14;color:var(--text);padding:0 12px;outline:none}input:focus{border-color:var(--accent)}.app-shell{min-height:100vh;padding:0 24px 24px}.topbar{position:relative;width:min(1360px,100%);margin:0 auto;padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px}.topbar:after{content:"";position:absolute;left:50%;bottom:0;width:100vw;height:1px;transform:translate(-50%);background:var(--border)}.brand{font-weight:760;letter-spacing:0}.topnav{display:flex;flex:1;gap:16px;color:var(--muted);font-size:14px}.topnav-center{justify-content:center}.topnav-right{justify-content:flex-end}.page{position:relative;z-index:0;width:min(1080px,100%);margin:0 auto;min-height:calc(100vh - 92px);padding:24px 0 0}.page:before{content:"";position:absolute;z-index:-1;top:0;bottom:-24px;left:50%;width:100vw;transform:translate(-50%);background:linear-gradient(180deg,#ffffff07,#ffffff03)}.stack{display:grid;gap:16px}.page-title{margin:0 0 6px;font-size:clamp(30px,6vw,56px);line-height:1;letter-spacing:0}.page-copy{margin:0;color:var(--muted);line-height:1.6}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:14px}.surface{border:1px solid var(--border);border-radius:var(--radius);background:#111318e0;color:var(--text);padding:18px}.surface h2,.surface h3{margin:0;letter-spacing:0}.session-complete-panel{min-height:min(520px,calc(100vh - 180px));display:grid;place-items:center;align-content:center;gap:18px;text-align:center}.session-complete-panel h1{margin:0;font-size:clamp(34px,7vw,62px);line-height:1;letter-spacing:0;text-transform:lowercase}.session-complete-panel button{min-width:160px;border-color:#8dd7c857;background:var(--surface-2);color:var(--text)}.session-complete-panel button:hover{border-color:#8dd7c899;background:#8dd7c81a}.muted{color:var(--muted)}.progress{height:6px;overflow:hidden;border-radius:999px;background:#272a31}.progress>div{height:100%;border-radius:inherit;background:var(--accent)}.toolbar{display:flex;flex-wrap:wrap;gap:10px}.player{min-height:260px;display:grid;place-items:center;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);overflow:hidden}.subtitle-line{display:grid;gap:4px;border:1px solid transparent;border-radius:var(--radius);padding:12px;background:var(--surface)}.subtitle-line.active{border-color:#8dd7c899;background:#8dd7c814}@media (max-width: 720px){.app-shell{padding:0 16px 16px}.topbar{padding:16px 0;flex-wrap:wrap;align-items:center;row-gap:10px}.topnav-center{order:3;flex:0 0 100%;justify-content:center;gap:10px}.topnav-right{flex:0 0 auto;margin-left:auto;justify-content:flex-end;gap:8px}.page{min-height:calc(100vh - 72px);padding-top:18px}}@media (max-width: 520px){.topnav{font-size:13px}.topnav>a,.topnav>button{padding:0 8px}}