html, body, h1{
	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;
}
.txt16{
	font-size: 1.45em;
}
.txt18{
	font-size: 1.63em;
}
.negre{
	color: #000;
}
.negreta{
	font-weight: bold;
}
.padding_sup_petit{
	padding_top: 3px;
}
.padding_sup_gran{
	padding-top: 20px;
}
.alinea_dreta{
	text-align:right;
}