*{box-sizing:border-box;margin:0;padding:0}html,body{touch-action:none;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none;background:#000;width:100%;height:100%;overflow:hidden}#app{width:100%;height:100%}.game-container{width:100%;max-width:500px;height:100%;margin:0 auto;position:relative}.game-canvas{width:100%;height:100%;display:block}