body {
    font-family: Bookerly, Optima, Candara, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
}
header {
    background-color: #333;
    color: #fff;
    padding: 20px;
}
section {
    padding: 0 20px 0;
}
ul {
    list-style-type: none;
    padding: 0;
}
ul li {
    padding: 10px;
}
ul li:hover {
    background-color: #e0e0e0;
}