/* Add a black background color to the top navigation*/
.topnav { background-color: #333; overflow: hidden; }

/* Style the links inside the navigation bar*/
.topnav a{ 
	float: left; #f2f2f2; text-align: center;
	padding: 14px 16px; text-decoration: none;
	font-size: 17px;
}
/* Change the color of links on hover */
.topnav a: hover {
	background-color: #ddd;
	color: black;
}

/* Add a color to the active/current link*/
.topnav a.active {
	background-color: #4CAF50;
	color: white;
}