html, body {
	position: absolute;
	overflow: hidden;
	margin: 0;
	padding: 0;
	width: 100%;
	height: 100%;
	background:#000;
	touch-action: none;
	content-zooming: none;
}
canvas {
	position: absolute;
	width: 100%;
	height: 100%;
	cursor: crosshair;
	background:#eee;
}