body{color:#eee;background:#111;justify-content:center;margin:0;font-family:system-ui,sans-serif;display:flex}main{text-align:center;max-width:100%;padding:16px}#fullscreen{color:#eee;cursor:pointer;background:#222;border:1px solid #555;border-radius:6px;margin-bottom:12px;padding:8px 16px;font-size:1rem}#stage{display:inline-block}#frame{display:inline-block;position:relative}#stage:fullscreen{background:#000;justify-content:center;align-items:center;display:flex}#stage:fullscreen #video{max-height:100vh}#video{border-radius:8px;max-width:100%;transform:scaleX(-1)}#overlay{pointer-events:none;width:100%;height:100%;position:absolute;inset:0;transform:scaleX(-1)}