html,body{margin:0;padding:0;width:100%;height:100%;background:#000;overflow:hidden;touch-action:none;user-select:none;-webkit-user-select:none}#stage{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%)}#screen{display:block;image-rendering:pixelated;image-rendering:crisp-edges;outline:none;cursor:default}#crt{position:absolute;inset:0;pointer-events:none;display:none;background:repeating-linear-gradient(to bottom,#0000 0 50%,#00000047 50% 100%),radial-gradient(ellipse at center,#0000 60%,#00000073)}#crt.on{display:block}