html,body
{
   /* height:100%;*/
    background-color: #CCCCCC;
}

.centrado {
	position:relative;
	top: 50px;
	width: 60%;
	height: 100%;
	vertical-align: middle;
	/*alignment-adjust: center;*/
	background-color: #CCCCCC;
}

.contenido {
	position:relative;
	width: 80%;
	height: 100%;
	vertical-align: center;
	margin-top: 0px;
	background-color: #CCCCCC;
}