.topnav {
	overflow: hidden;
	position: relative;
}

.topnav a {
	color: #666;
	padding: 3px 10px;
	text-decoration: none;
	font-size: 20px;
	display: block;
}

.topnav a.icon {
	display: block;
	width: 35px;
}

.active {
	background-color: #4CAF50;
	color: white;
}