body{margin:0;padding:0;}
#overlay{
  position: fixed; /* Sit on top of the page content */
  width: 100%; 
  line-height: 80%;
  top: 0;
  left: 0;
  background-color: #002030;
  z-index: 2;
  }
H1{ 
	padding-left:15px;
	font-size:18px;
	font-weight:200;
	background:#002030;
	color:white;
	}
  #off{display:inline;}
  
  #viewer{
	  height: 99vh;
	  width:100vw;
  }
  @media (max-width: 800px) {
	   #overlay{ line-height:100%;}
	   #off{display:none;} 
  }