body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
}

header {
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

nav li {
    display: inline-block;
    margin: 0 10px;
}

a {
    text-decoration: none;
    color: #333;
}

section {
    margin-top: 20px;
}