.topnav {
    overflow: hidden;
    background-color: #333;
    position: relative;
}

    .topnav #myLinks {
        display: none;
    }


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

        .topnav a.icon {
            background: #ffed00;
            display: block;
            position: absolute;
            left: 0;
            top: 0;
        }

        .topnav a:hover {
            background-color: #ffed00;
            color: black;
        }

.active-nav {
    background-color: #ffed00;
    color: white;
}