*{box-sizing:border-box;font-family:system-ui,-apple-system,sans-serif}body{margin:0;min-height:100vh;display:grid;place-items:center;background:#020617;color:#e2e8f0}main{text-align:center;padding:14px}canvas{width:min(92vw,420px);height:auto;border:2px solid #334155;border-radius:10px;background:#0b1024}.controls{margin-top:10px;display:flex;justify-content:center;gap:10px}.controls button{font-size:24px;padding:10px 16px;border-radius:12px;border:0;background:#1e293b;color:#fff}.room-bar{display:flex;gap:8px;justify-content:center;margin:8px 0}input{padding:8px;border-radius:8px;border:1px solid #334155;background:#0f172a;color:#fff;width:120px;text-transform:uppercase}button{cursor:pointer}