body {
	overflow: hidden;
}

#heightmap {
	display:none;
	position:absolute;
	/* margin:auto; */
	/* left:0; */
	/* right:0; */
	/* width:70%; */
	/* height:60%; */
	/* margin-top:10px; */

	width: 300px;
	height: 300px;
	left: 20px;
	margin: initial;
	top: 20px;


	z-index: 2;
}

#viewport {
	position:absolute;

	margin:auto;
	left:0;
	right:0;
	width:70%;
	height:60%;
	margin-top:10px;

	width: calc(100% - 320px);
	right: 0px;
	margin: initial;
	left: initial;
	height: 100%;


	width: 100%;
	height: 100%;
	z-index: 1;
}