:root{color-scheme:light dark;--bg:#fff;--text:#222;--muted:#696969;--surface:#f3f3f3;--line:#e7e7e7;--border:#d4d4d4;--primary:#222;--on-primary:#fff;--danger:#b33d38;--success:#24734c;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei UI",sans-serif;font-size:16px;line-height:1.6;background:var(--bg);color:var(--text)}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{min-height:44px;padding:10px 18px;border:1px solid transparent;border-radius:9px;background:var(--primary);color:var(--on-primary);cursor:pointer;font-size:14px;font-weight:500}button:hover{filter:brightness(.88)}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid #737373;outline-offset:4px}input{min-width:0;min-height:46px;padding:10px 12px;border:1px solid var(--border);border-radius:8px;color:var(--text);background:var(--bg);caret-color:var(--text)}input::placeholder{color:var(--muted)}::selection{background:#ddd;color:#111}[hidden]{display:none!important}.topbar{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 40px;border-bottom:1px solid var(--line);gap:20px}.brand{color:var(--text);text-decoration:none;font-size:15px;font-weight:650;letter-spacing:.01em;display:flex;align-items:center;gap:18px}.brand span{font-weight:400;letter-spacing:0;color:var(--muted);font-size:14px}.connection{font-size:13px;color:var(--muted);white-space:nowrap}.connection.connected{color:var(--success)}main{max-width:1000px;margin:auto;padding:0 32px}.entry{max-width:380px;margin:clamp(64px,14vh,140px) auto 80px}.phone-mark{width:44px;height:44px;margin-bottom:24px;color:var(--muted)}.phone-mark svg{width:100%;height:100%}h1{font-size:26px;letter-spacing:-.025em;line-height:1.35;margin:0 0 12px;font-weight:600}.entry p{color:var(--muted);margin:0 0 32px}.entry form{display:grid;gap:12px}.entry label{font-size:14px}.entry form button{margin-top:4px}.entry .support{font-size:13px;margin-top:24px}.entry .error,.error{color:var(--danger);margin:18px 0 0;font-size:14px}.viewer{max-width:680px;margin:32px auto}.viewer-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:24px}.viewer h1{font-size:20px;margin:0 0 4px}.viewer-heading p{font-size:13px;color:var(--muted);margin:0}.secondary{background:var(--bg);border-color:var(--border);color:var(--text)}.stage{position:relative;display:flex;justify-content:center;align-items:center;background:#151515;border-radius:12px;min-height:320px;height:min(66vh,720px);overflow:hidden}.stage video{display:block;max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;touch-action:none;user-select:none}.video-placeholder{color:#bbb;text-align:center;padding:24px;position:absolute;pointer-events:none}.controls{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:16px}.controls button{padding:8px 15px}.text-form{display:flex;gap:8px;margin-top:16px}.text-form input{flex:1}.session-footer{display:flex;justify-content:space-between;gap:16px;font-size:13px;color:var(--muted);padding:20px 0}.text-button{background:transparent;color:var(--text);min-height:44px;padding:8px 4px;text-decoration:underline;text-underline-offset:4px}details{border-top:1px solid var(--line);padding:16px 0;font-size:13px;color:var(--muted)}summary{cursor:pointer;width:fit-content}dl{display:grid;grid-template-columns:100px 1fr;gap:8px 16px;overflow-wrap:anywhere}dt,dd{margin:0}dd{color:var(--text);font-variant-numeric:tabular-nums}footer{max-width:1000px;margin:32px auto;padding:0 32px 24px;font-size:12px;color:var(--muted);text-align:center}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}@media(max-width:600px){.topbar{height:64px;padding:0 20px}.brand{font-size:14px;gap:10px}.brand span{font-size:12px}.connection{font-size:12px}main{padding:0 20px}.entry{margin:64px auto}.viewer{margin-top:24px}.viewer-heading{align-items:flex-start;margin-bottom:20px}.viewer h1{font-size:18px}.viewer-heading button{padding:8px 12px}.stage{height:58vh;min-height:280px;border-radius:10px}.controls{gap:6px}.controls button{padding:8px 12px}footer{padding:0 20px 20px}.session-footer{padding:16px 0}}@media(prefers-color-scheme:dark){:root{--bg:#212121;--text:#eee;--muted:#b4b4b4;--surface:#2f2f2f;--line:#3b3b3b;--border:#626262;--primary:#eee;--on-primary:#202020;--danger:#ffb1a9;--success:#8cd5ad}::selection{background:#555;color:#fff}}@media(prefers-reduced-motion:no-preference){.entry,.viewer{animation:arrive .24s ease-out}@keyframes arrive{from{opacity:.7;transform:translateY(4px)}to{opacity:1;transform:none}}}

details summary{min-height:44px;padding:10px 0;line-height:24px}