body, html {
  height: 100%;
  margin:0;
  font-family: Quicksand;
}

.center_div{
	height:100%;
	width:100%;
	text-align:center;
	vertical-align:middle;
	margin-top: 3em;
}

.center_img {
	max-height:100%;
	max-width:100%;
	display: inline-block;
	vertical-align:middle;
}

.center_img  img {
	max-height:100%;
	max-width:100%;
}