*{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden;background:#14161f;overscroll-behavior:none;touch-action:none;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}#game{width:100%;height:100%;position:relative;overflow:hidden}#game canvas{display:block}#rotate-notice{display:none}@media(orientation:portrait)and (max-width:900px){#rotate-notice{display:flex;position:fixed;inset:0;z-index:10;flex-direction:column;align-items:center;justify-content:center;gap:16px;background:#14161f;color:#f2f2f2;font-family:system-ui,-apple-system,sans-serif;text-align:center;padding:24px}#rotate-notice .rotate-icon{font-size:64px;transform:rotate(90deg)}}