*{
	padding: 0;
	margin: 0;
}

p{
	margin-bottom: 20px;
}

header{
	background: rgba(0,0,0,0.9);
	width: 100%;
	position: fixed;
	z-index: 100;
}

nav{
	float: left;
}

nav ul{
	list-style: none;
	overflow: hidden;
}

nav ul li{
	float: left;
	font-family: Arial, sans-serif;
	font-size: 16px;
}

nav ul li a{
	display: block;
	padding: 20px;
	color: #fff;
	text-decoration: none;
}

nav ul li:hover{
	background: #3ead47;
}

.contenido{
	padding-top: 80px;
}

.wrapper{
	width: 80%;
	margin: auto;
	overflow: hidden;
}