body{align-items:center;background:#fff;display:flex;height:100vh;justify-content:center;margin:0;width:100vw}canvas{border:0;display:block;height:min(600px,calc(min(100vh, 100vw) - 40px));outline:0;width:min(600px,calc(min(100vw, 100vh) - 40px))}