body, html {
	position: absolute;
	margin: 0;
	padding: 0;
	width: 100%;
	height: 100%;
	overflow: hidden;
	background: #fff;
}

canvas {
	position: absolute;
	padding: 0;
	width: 100vw;
	height: 100vw;
	max-height: 100vh;
	max-width: 100vh;
	margin: auto;
	top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	background: #eee;
	cursor: pointer;
}