:root{color-scheme:dark}*{box-sizing:border-box}body{margin:0;background:#0a0a1a;color:#e2e8f0;font-family:system-ui,-apple-system,sans-serif}.app{min-height:100vh;display:flex;flex-direction:column}header{text-align:center;padding:20px 16px 4px;position:relative}.back{position:absolute;left:16px;top:20px;color:#94a3b8;font-size:13px;text-decoration:none;padding:6px 12px;border:1px solid #334155;border-radius:8px;background:#0f172a}h1{margin:0;font-size:26px;font-weight:800;letter-spacing:-.5px}.brand{color:#6366f1}.subtitle{font-size:14px;font-weight:400;color:#888;margin-left:12px}.tagline{margin:4px 0 0;color:#888;font-size:14px}.lang-switch{position:absolute;right:16px;top:20px;display:flex;gap:6px}.lang-switch a{color:#94a3b8;font-size:13px;text-decoration:none;padding:6px 10px;border:1px solid #334155;border-radius:8px;background:#0f172a}.lang-switch a[aria-current=true]{color:#e2e8f0;border-color:#6366f1}.loading{text-align:center;color:#fbbf24;font-size:14px}main{flex:1;width:100%;max-width:1040px;margin:0 auto;padding:8px 16px 24px;display:flex;flex-direction:column;gap:12px}.scene-wrap{position:relative;height:46vh;min-height:320px;border-radius:12px;overflow:hidden;border:1px solid #1e293b}.scene-wrap canvas{display:block}.scene-fallback{position:absolute;left:-10000px;top:auto;width:1px;height:1px;overflow:hidden}.controls .buttons{display:flex;flex-wrap:wrap;gap:8px;align-items:center}button{background:#1e293b;color:#e2e8f0;border:1px solid #334155;border-radius:8px;padding:8px 14px;font-size:14px;cursor:pointer}button:hover:not(:disabled){border-color:#6366f1}button:disabled{opacity:.45;cursor:not-allowed}button.primary{background:#4338ca;border-color:#4338ca}button.primary:hover:not(:disabled){background:#4f46e5}.speed{display:flex;align-items:center;gap:8px;font-size:13px;color:#94a3b8}.speed input{width:110px}.hint{margin:8px 0 0;color:#64748b;font-size:12.5px}.hint em{color:#475569}.hud-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px}.hud-card{background:#0f172a;border:1px solid #1e293b;border-radius:12px;padding:12px 14px}.hud-card h3{margin:0 0 8px;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:#64748b}.hud-card dl{margin:0;display:flex;flex-direction:column;gap:4px}.hud-card dl>div{display:flex;justify-content:space-between;gap:12px;font-size:13px}.hud-card dt{color:#94a3b8}.hud-card dd{margin:0;font-variant-numeric:tabular-nums;text-align:right}.mode-training{color:#4ade80}.mode-inference{color:#60a5fa}.mode-stopped{color:#94a3b8}.ok{color:#4ade80}.sparkline{width:100%;height:48px;background:#020617;border-radius:6px}.error{color:#f87171;font-size:13px}@media (max-width: 480px){h1{font-size:20px}.subtitle{display:block;margin:2px 0 0}.scene-wrap{height:40vh;min-height:260px}.back{position:static;display:inline-block;margin-bottom:8px}.lang-switch{position:static;justify-content:center;margin-top:8px}header{display:flex;flex-direction:column;align-items:center}}@media (prefers-reduced-motion: reduce){*{scroll-behavior:auto}}