html {
	margin: 0 auto;
	width: 1500px;
}

nav {
	position: fixed;
	text-align: center;
	background-color: white;
	border-radius: 15px;
}

a {
	text-decoration: none;
	color: black;
}

body {
	background-color: grey;
}

.nava:hover {
	background-color: gold;
	border-radius: 15px;
}

.nava_selected {
	background-color: gold;
	border-radius: 15px;
}

img {
	border-radius: 15px;
	float: left;
}

footer {
	text-align: center;
}