*{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden;background:#000}#game-container{display:flex;justify-content:center;align-items:center;width:100%;height:100%}#game-canvas{display:block;width:100%;height:100%;background:#000;touch-action:none;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}