:root{--bg:#0d1117;--panel:#161b22e6;--border:#30363d;--text:#e6edf3;--muted:#8b949e;--accent:#58a6ff;--danger:#f85149;--ok:#3fb950}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{background:var(--bg);height:100%;color:var(--text);touch-action:none;overscroll-behavior:none;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;overflow:hidden}#app{flex-direction:column;height:100dvh;display:flex}.topbar{padding:max(8px, env(safe-area-inset-top)) 16px 8px;z-index:5;justify-content:space-between;align-items:center;display:flex}.logo{font-size:17px;font-weight:700}.pill{color:var(--accent);border:1px solid var(--border);background:var(--panel);border-radius:999px;padding:4px 10px;font-size:12px}#stage{background:#000;flex:1;min-height:0;position:relative}#video{object-fit:cover;opacity:0;pointer-events:none;width:100%;height:100%;position:absolute;inset:0}#canvas{object-fit:cover;width:100%;height:100%;display:block;position:absolute;inset:0}.hint{background:var(--panel);border:1px solid var(--border);text-align:center;white-space:nowrap;text-overflow:ellipsis;pointer-events:none;border-radius:999px;max-width:calc(100% - 32px);padding:8px 14px;font-size:13px;transition:opacity .2s;position:absolute;bottom:14px;left:50%;overflow:hidden;transform:translate(-50%)}.hint.hidden{opacity:0}#controls{z-index:5;padding:10px 12px max(12px, env(safe-area-inset-bottom));background:linear-gradient(#0d111700 0%,#0d1117eb 30%);flex-direction:column;gap:10px;display:flex}.filters{scrollbar-width:none;gap:8px;padding:2px 2px 6px;display:flex;overflow-x:auto}.filters::-webkit-scrollbar{display:none}.chip{background:var(--panel);border:1px solid var(--border);color:var(--text);cursor:pointer;border-radius:999px;flex:none;padding:7px 14px;font-size:13px}.chip.active{color:#fff;background:#1f6feb;border-color:#1f6feb}.actions{justify-content:center;align-items:center;gap:16px;display:flex}.btn{background:var(--panel);color:var(--text);border:1px solid var(--border);cursor:pointer;border-radius:12px;padding:10px 18px;font-size:14px}.btn:disabled{opacity:.4;cursor:not-allowed}.btn.primary{color:#fff;background:#1f6feb;border-color:#1f6feb}.record{cursor:pointer;background:0 0;border:4px solid #fff;border-radius:50%;justify-content:center;align-items:center;width:64px;height:64px;display:flex}.record:disabled{opacity:.4;cursor:not-allowed}.record-dot{background:var(--danger);border-radius:50%;width:42px;height:42px;transition:border-radius .2s}.record.recording .record-dot{background:var(--danger);border-radius:10px}.toast{left:50%;top:max(56px, calc(env(safe-area-inset-top) + 48px));background:var(--panel);border:1px solid var(--border);z-index:30;border-radius:10px;padding:10px 16px;font-size:13px;position:fixed;transform:translate(-50%);box-shadow:0 8px 24px #0006}.onboard{z-index:40;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#0d1117d1;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.onboard.hidden{display:none}.onboard-card{background:var(--panel);border:1px solid var(--border);text-align:center;border-radius:20px;max-width:360px;padding:28px 24px}.onboard-card h1{margin:12px 0 8px;font-size:22px}.onboard-card p{color:var(--muted);margin:0 0 18px;font-size:14px;line-height:1.6}.demo-hand{width:120px;height:100px;margin:0 auto;position:relative}.demo-frame{border:3px dashed var(--accent);border-radius:12px;width:88px;height:88px;animation:1.6s ease-in-out infinite pulse;position:absolute;top:8px;left:50%;transform:translate(-50%)}.demo-hand-icon{filter:drop-shadow(0 4px 8px #00000080);font-size:44px;position:absolute;bottom:0;left:50%;transform:translate(-50%)}@keyframes pulse{0%,to{opacity:.85;transform:translate(-50%)scale(1)}50%{opacity:1;transform:translate(-50%)scale(1.06)}}footer{color:var(--muted);text-align:center;padding-bottom:8px;font-size:12px}