.topnav {
    overflow: hidden;
    position: relative;
    background-color: #333;
    border-bottom: 1px solid grey;
    box-shadow: 5px 0px 5px grey;
}

    .topnav #myLinks {
        display: none;
    }

        

    .topnav a {
        color: white;
        padding: 14px 16px;
        text-decoration: none;
        font-size: 17px;
        display: block;
    }

        .topnav a.icon {
            background: black;
            display: block;
            position: absolute;
            right: 0;
            top: 0;
        }

        .topnav a:hover {
            background-color: antiquewhite;
            color: black;
        }

.active {
    background-color: #FFFFFF;
}