body {
    font-family: Arial, Helvetica, sans-serif;
    margin: 30px;
}

nav {
    margin-bottom: 20px;
}

nav a {
    text-decoration: none;
    margin-right: 20px;
    color: blue;
}

nav a:hover {
    text-decoration: underline;
}

main {
    margin-top: 30px;
}