@font-face{font-family:Noto Sans;src:url(/fonts/NotoSans-Regular.ttf) format("truetype");font-display:swap}:root{--bg:#f4f5fb;--bg2:#e6e8f8;--fg:#14152b;--mut:#5d6085;--card:rgba(255,255,255,.72);--line:rgba(80,70,200,.2);--a:#6a4cff;--b:#00a9cc;--grid:rgba(106,76,255,.25);--sh:rgba(60,40,160,.22);--err:#d6224f;--font: "Noto Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--mono: ui-monospace, Menlo, Consolas, monospace;color-scheme:light}:root[data-theme=dark]{--bg:#07071a;--bg2:#12103a;--fg:#eceeff;--mut:#9a9dc9;--card:rgba(24,22,60,.6);--line:rgba(140,130,255,.26);--a:#8b72ff;--b:#2fe0ff;--grid:rgba(120,100,255,.32);--sh:rgba(0,0,0,.55);--err:#ff6b8a;color-scheme:dark}*{box-sizing:border-box}body{margin:0;min-height:100vh;font:16px/1.6 var(--font);color:var(--fg);background:radial-gradient(1100px 650px at 50% -10%,var(--bg2),var(--bg));overflow-x:hidden}:focus-visible{outline:2px solid var(--b);outline-offset:2px}a{color:inherit}.floor{position:fixed;inset:auto -50% -10vh;height:65vh;z-index:-1;pointer-events:none;transform:perspective(500px) rotateX(68deg);transform-origin:50% 100%;background:linear-gradient(var(--grid) 1px,transparent 1px) 0 0/60px 60px,linear-gradient(90deg,var(--grid) 1px,transparent 1px) 0 0/60px 60px;-webkit-mask-image:linear-gradient(to top,#000 20%,transparent);mask-image:linear-gradient(to top,#000 20%,transparent);animation:floor 3s linear infinite}@keyframes floor{to{background-position:0 60px,60px 0}}.cube{width:72px;height:72px;margin:0 auto 28px;position:relative;transform-style:preserve-3d;animation:spin 14s linear infinite}.cube i{position:absolute;inset:0;border:1.5px solid var(--b);background:linear-gradient(135deg,color-mix(in srgb,var(--a) 35%,transparent),color-mix(in srgb,var(--b) 15%,transparent))}.cube i:nth-child(1){transform:translateZ(36px)}.cube i:nth-child(2){transform:rotateY(180deg) translateZ(36px)}.cube i:nth-child(3){transform:rotateY(90deg) translateZ(36px)}.cube i:nth-child(4){transform:rotateY(-90deg) translateZ(36px)}.cube i:nth-child(5){transform:rotateX(90deg) translateZ(36px)}.cube i:nth-child(6){transform:rotateX(-90deg) translateZ(36px)}@keyframes spin{0%{transform:rotateX(-25deg) rotateY(0)}to{transform:rotateX(335deg) rotateY(360deg)}}.top{display:flex;justify-content:space-between;align-items:center;max-width:1080px;margin:0 auto;padding:calc(16px + env(safe-area-inset-top,0px)) 20px 0}.top b{font-size:20px;letter-spacing:-.02em}.top span{color:var(--a)}main{max-width:1080px;margin:0 auto;padding:28px 20px 80px}.hero{text-align:center;perspective:1000px}h1{font-size:clamp(30px,6vw,56px);line-height:1.08;letter-spacing:-.035em;margin:0 0 12px}.sub,.muted{color:var(--mut)}.sub{max-width:560px;margin:0 auto 26px}.panel,.card,.note{--rx: 0deg;--ry: 0deg;background:var(--card);border:1px solid var(--line);border-radius:20px;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:0 30px 60px -28px var(--sh);transform:perspective(1000px) rotateX(var(--rx)) rotateY(var(--ry));transition:transform .15s ease-out}.panel{max-width:700px;margin:0 auto;padding:18px}.row{display:flex;gap:10px;flex-wrap:wrap}input,select{min-width:0;padding:14px 16px;border-radius:12px;border:1px solid var(--line);background:color-mix(in srgb,var(--bg) 75%,transparent);color:var(--fg);font:inherit}input{flex:1 1 240px}select{flex:0 0 160px}button{font:inherit;font-weight:600;cursor:pointer;border:0;color:#fff;padding:14px 22px;border-radius:12px;background:linear-gradient(135deg,var(--a),var(--b));box-shadow:0 5px color-mix(in srgb,var(--a) 55%,#000),0 14px 26px var(--sh);transition:transform .12s,box-shadow .12s}button:hover:not(:disabled){transform:translateY(-2px)}button:active:not(:disabled){transform:translateY(4px);box-shadow:0 1px color-mix(in srgb,var(--a) 55%,#000)}button:disabled{opacity:.6;cursor:wait}button.ghost{background:transparent;color:var(--fg);border:1px solid var(--line);box-shadow:none;padding:9px 14px}.msg{min-height:24px;margin:10px 4px 0;font-size:14px;color:var(--mut)}.msg.err{color:var(--err)}.ts{display:flex;justify-content:center;margin-top:8px}.progress-beam{height:7px;margin:12px 4px 2px;overflow:hidden;border-radius:99px;background:color-mix(in srgb,var(--line) 75%,transparent)}.progress-beam span{display:block;position:relative;width:38%;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--a),var(--b));box-shadow:0 0 14px color-mix(in srgb,var(--b) 75%,transparent);animation:progress-sweep 1.35s ease-in-out infinite}.progress-beam.determinate span{width:var(--progress);min-width:4px;animation:none;transition:width .35s ease}.progress-beam.determinate span:after{content:"";position:absolute;inset:0;border-radius:inherit;background:linear-gradient(100deg,transparent 20%,rgba(255,255,255,.7) 50%,transparent 80%);animation:progress-shine 1.4s linear infinite}@keyframes progress-sweep{0%{transform:translate(-110%)}to{transform:translate(275%)}}@keyframes progress-shine{0%{transform:translate(-100%)}to{transform:translate(100%)}}.modes{margin-top:56px;text-align:center}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;margin-top:22px}.card{text-align:left;color:var(--fg);padding:26px;box-shadow:0 30px 60px -28px var(--sh)}.card h3{margin:0 0 8px;font-size:20px}.card p{margin:0;color:var(--mut)}.result{margin-top:48px}.bar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:20px}.bar h2{margin:0;font-size:clamp(20px,3.4vw,28px)}.layout{display:grid;grid-template-columns:220px 1fr;gap:24px;align-items:start}.layout:has(>.col:only-child){grid-template-columns:1fr}nav{position:sticky;top:16px;display:flex;flex-direction:column;gap:4px;max-height:80vh;overflow:auto;font-size:13px}nav a{color:var(--mut);text-decoration:none;padding:6px 10px;border-left:2px solid var(--line)}nav a:hover{color:var(--fg);border-color:var(--b)}.col{display:flex;flex-direction:column;gap:18px;min-width:0}.note{padding:22px 24px}.note h3{margin:0 0 12px;font-size:18px;display:flex;gap:10px;align-items:baseline;flex-wrap:wrap}.transcript-tools{display:grid;grid-template-columns:minmax(0,1fr);gap:10px}.transcript-count{margin:8px 2px;font-size:13px}.transcript-text{max-height:70vh;overflow:auto}.transcript-minute+.transcript-minute{margin-top:20px;padding-top:14px;border-top:1px solid var(--line)}.transcript-minute h4{display:flex;justify-content:space-between;gap:12px;margin:0 0 8px;color:var(--a);font-size:14px}.transcript-minute h4 span{color:var(--mut);font:12px var(--mono)}.transcript-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.load-more{display:block;margin:0 auto}.chapter-summary+.chapter-summary{margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}.chapter-summary h4{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px;margin:0 0 6px}.chapter-summary p{margin:0 0 8px}.self-test{border-top:1px solid var(--line);padding:12px 0}.self-test summary{cursor:pointer;font-weight:600}.self-test p{margin:8px 0 0;color:var(--mut)}.item{margin:14px 0}blockquote{margin:6px 0 0;padding:4px 14px;border-left:3px solid var(--a);color:var(--mut);font-style:italic}.chip{font:600 12px var(--mono);color:var(--b);border:1px solid var(--b);padding:1px 8px;border-radius:99px;text-decoration:none;font-style:normal;white-space:nowrap}.tag{font-size:11px;text-transform:uppercase;letter-spacing:.06em;font-weight:700;color:var(--a);margin-right:8px}.seg{margin:6px 0}.search{width:100%;flex:none}.mermaid{overflow-x:auto}.mermaid svg{max-width:100%;height:auto}ul{padding-left:20px;margin:0}li{margin:6px 0}footer{text-align:center;color:var(--mut);font-size:13px;padding:0 20px calc(28px + env(safe-area-inset-bottom,0px))}@media(max-width:800px){.layout{grid-template-columns:1fr}nav{display:none}}@media(max-width:520px){.transcript-tools{grid-template-columns:1fr}select{flex-basis:auto}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}