.header {
    background-color: darkgoldenrod;
    text-align: center;
    padding: 1%;
    color: beige;
    font-size: 150%;
}

.topnav {
    overflow: hidden;
    background-color: #333;
    font-size: 100%;
}

.topnav a {
    float: right;
    display: block;
    color: #f2f2f2;
    text-align: center;
    padding: 1% 1%;
    text-decoration: none;
}