body{background:#020617;color:#e5e7eb;font-family:system-ui,sans-serif;text-align:center}.stage{position:relative;display:inline-block}video,canvas{width:320px;max-width:90vw;border-radius:12px}canvas{position:absolute;top:0;left:0;pointer-events:none}button{background:#0f172a;color:#e5e7eb;border:1px solid #334155;padding:8px 14px;border-radius:8px;cursor:pointer;font-size:14px}button:hover:not(:disabled){background:#1e293b}button:disabled{opacity:.5;cursor:not-allowed}