html{width: 100%; height:100%; margin:0; padding:0;overflow:hidden;}
body{height:100%; margin:0; padding:0;}
header{
	display:none;
	position:absolute; height: 50px; width: 100%; 
	background: rgba(0,0,0,0.5); color: rgb(8,111,216);
	}
header h1{float:left; margin: 0 1em; padding: 0;}
canvas{width:100%;height:100%;}