html {
	background: #ddd;
	/* height: 100%; */
}

body {
	/* height: 100%;	 */
	margin: 0;
	padding: 16px;
}

canvas {
	margin: auto;
	/* width: 900px;
	height: 900px; */
	display: block;
	max-width: calc(100vw - 48px);
	max-height: calc(100vw - 48px);
	box-shadow: 0px 0px 10px 0px rgba(0,0,0,0.75);
}