body{height:100vh;height:calc(var(--vh,1vh)*100);background:#666;justify-content:center;align-items:center;display:flex}body,html{margin:0;padding:0;overflow:hidden}canvas{max-width:100%;max-height:100%;touch-action:none;vertical-align:middle;margin:0 auto;display:inline-block;height:auto!important;width:auto!important}