.topnav a {
        float: left;
        display: block;
        color: #FFFFFF;
        text-align: center;
        padding: 14px 16px;
        text-decoration: none;
        font-size: 17px;
    }

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

.active {
    background-color: #a563a1;
    color: white;
}

.topnav .icon {
    display: none;
}

@media screen and (max-width: 600px) {
    .topnav a:not(:first-child) {
        display: none;
    }

    .topnav a.icon {
        float: right;
        display: block;
    }
}

@media screen and (max-width: 600px) {
    .topnav.responsive {
        position: relative;
    }

        .topnav.responsive .icon {
            position: absolute;
            right: 0;
            top: 0;
        }

        .topnav.responsive a {
            float: none;
            display: block;
            text-align: left;
        }
}