body {
    font-family: Arial, sans-serif;
    margin: 2em;
    background: #f7f7f7;
}
h1 {
    color: #1877f2;
}
nav a {
    color: #1877f2;
    text-decoration: none;
    margin-right: 1em;
}
nav a:hover {
    text-decoration: underline;
}