:root{color-scheme:dark}*{box-sizing:border-box}html,body{width:100%;height:100%;margin:0;padding:0;background:radial-gradient(circle at top,#10182f,#05070d 60%,#03050a);font-family:Trebuchet MS,Tahoma,sans-serif;overflow:hidden}#app{width:100%;height:100%;display:flex;align-items:center;justify-content:center;touch-action:none}canvas{display:block;touch-action:none}