*,:after,:before{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}body{background-color:#000;text-align:center}img{display:none}canvas{position:absolute;display:block;max-height:100vh;max-width:100vw;top:50%;left:50%;-webkit-transform:translate(-50%,-50%);-moz-transform:translate(-50%,-50%);-o-transform:translate(-50%,-50%);-ms-transform:translate(-50%,-50%);transform:translate(-50%,-50%)}