*{
	padding:0;
	margin:0;
	-webkit-box-sizing:border-box;
	-moz-box-sizing:border-box;
	box-sizing:border-box;

}
body{
	background-image: url(fondo.jpg);
	background-attachment: fixed;
	overflow: scroll;
}
.contenedor{
	width: 95%;
	max-width:1000px;
	margin:15px auto;
}
	.contenedor p {
		margin-bottom: 40px;
		
	}
.contenedor-galeria{
	width: 95%;
	max-width:1000px;
	margin:15px auto;
}
.elemento{
	width: 220px;
	max-width: 220px;
	background: #fff;
	float: left;
	margin-right: 15px;
	margin-bottom: 15px;
}


header nav {
	background: #3498db;
	z-index: 10;
	margin-bottom: 10px;
}
	header nav ul{
		list-style: none;
		overflow: hidden;		
	}
		header nav ul li {
			float:left;
		}
			header nav ul li a {
				display:block;
				padding: 20px;
				color:#fff;
				text-decoration: none;
			}
				header nav ul li a:hover {
					background: #2980b9;
				}
.menu-fixed {
	position: fixed;
	z-index: 1000;
	top:0;
	width: 100%;
	max-width: 1000px;

}

.ir-arriba {
	display: none;
	padding: 20px;
	background: #024959;
	font-size: 40px;
	color:#fff;
	cursor: pointer;
	position: fixed;
	bottom: 20px;
	right: 20px;

}