html, body{
	margin: 0;
	padding: 0;
}

body{
	font-family: Verdana,Arial,Helvetica,sans-serif;
	font-size: 68.75%;
	padding-bottom: 7px;
	text-align:center;
}

.zona{
	background-color: #E6E6E6;
	width: 500px;
	margin: 10% auto;
	overflow:hidden;
	font-size: 1em;
}
.contenidor{
	margin: 40px;
	width: 420px;
	text-align:left;
}