html,body{margin:0;padding:0;width:100%;height:100%;overflow:hidden;background-color:#1a1a1a;display:flex;justify-content:center;align-items:center}#app{width:100%;height:100%;display:flex;justify-content:center;align-items:center}canvas{display:block;max-width:100%;max-height:100%;box-shadow:0 0 20px #00000080}