#fullScreen,body,html{display:flex;position:fixed;top:0;right:0;bottom:0;left:0}body,html{color:#fff;background-color:#000;justify-content:center;align-items:center;margin:0;padding:0;font-size:.8em}#fullScreen canvas,canvas{object-fit:contain;max-height:100%;max-width:100%}#fullScreen{justify-content:center;align-items:center}