*{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden;background:radial-gradient(circle at top,#f6fbff 0%,#dff6ff 100%);font-family:'Trebuchet MS','Arial',sans-serif;user-select:none;touch-action:none}#game-container{width:100%;height:100%}canvas{width:100%;height:100%;display:block}