/*.topnav {
    background-color: #333;
    overflow: hidden;
}

/* Style the links inside the navigation bar */
.navbar navbar-default topnav a {
    float: left;
    color: #f2f2f2;
    text-align: center;
    padding: 10px 10px;
    text-decoration: none;
    font-size: 17px;
}

/* Change the color of links on hover */
.a:hover {
    background-color: #ddd;
    color: black;
}

/* Add a color to the active/current link */
.navbar-default .navbar-nav > li > a.active {
    background-color: #4CAF50;
    color: white;
}

.navbar-default .navbar-nav > li > a:hover{
    background-color: #ddd;
    color: black;
}