.centrar {
	vertical-align: middle;
	text-align: center;
	padding: 5px;
}

p{
	text-align: justify;
	margin-left: 10px;
	margin-right: 10px;
	margin-bottom: 10px;
	margin-top: 10px;
	font-family: 'Roboto', sans-serif;
	font: blue;

}

h1{
	text-align: center;
	margin-left: 5px;
	margin-right: 5px;
	margin-bottom: 10px;
	margin-top: 10px;
	font-family: 'Oswald', sans-serif;
}


body{
	padding-left: 20px;
	padding-right: 20px; 
}

.encabezado{
	padding: 15px 0; 
	background: -moz-linear-gradient(top, #ffff00, #0000ff); 
	background: -webkit-linear-gradient(top, #ffff00, #0000ff);
	background: -o-linear-gradient(top, #ffff00, #0000ff); 
	background: -ms-linear-gradient(top, #ffff00, #0000ff); 
	background: linear-gradient(top, #ffff00, #0000ff);
	color: #000;
	border-radius: 10px;
	vertical-align: middle;
	text-align: center;
}



footer{
	margin-bottom: 0px;
	clear: both;
	box-shadow: #999 5px 5px 5px;
	border-radius: 5px;
	text-align: right;
}



img { 
    display: inline-block;
}

.principal{
	width: 70%;
	float: left;
	background-color: #f5f5f5;
}

aside{
	width: 30%;
	float: left;

}
iframe{
	width: 100%;
	height: 60%
}
h3{
	background: -webkit-repeating-linear-gradient(#fff, #666 100%);
	background: -moz-repeating-linear-gradient(#fff, #666 100%);
	background: -o-repeating-linear-gradient(#fff, #666 100%);
	background: repeating-linear-gradient(#fff, #666 100%);
}