#stage{width:100%;aspect-ratio:16/9;background:#09111d;border:1px solid #223;border-radius:6px;overflow:hidden;position:relative}
#stage canvas{display:block;width:100%;height:100%;box-sizing:border-box;touch-action:none}
.stage-overlay{position:absolute;top:0;left:0;right:0;bottom:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center;background:#09111d;color:#e6edf5}
.stage-overlay[hidden]{display:none}
.fallback-title{font-size:1.1rem;font-weight:600;margin:0 0 8px;color:#ff7a90}
.fallback-message{font-size:.9rem;color:#9fb3c8;margin:0;max-width:480px;line-height:1.5}
.controls{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:12px 0 8px}
.controls button{background:#162436;color:#e6edf5;border:1px solid #2e4460;border-radius:4px;padding:6px 14px;font:inherit;font-size:.95rem;cursor:pointer}
.controls button:hover:not(:disabled){background:#1e324c;border-color:#4a6b94}
.controls button:disabled{opacity:.5;cursor:not-allowed}
.controls button.active{background:#2a4b70;border-color:#6aa9ff;color:#fff;font-weight:600}
.controls label{display:flex;align-items:center;gap:8px;font-size:.95rem;color:#b8c9da}
.controls input[type=range]{accent-color:#6aa9ff;cursor:pointer}
.controls input[type=range]:disabled{opacity:.5;cursor:not-allowed}
.cutoff-group{display:inline-flex;align-items:center;gap:6px}
#atom-info{min-height:1.4em;margin-top:4px;color:#79bfff;font-family:monospace}