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

header, nav, section, footer {
    margin: 20px;
    padding: 20px;
    border: 1px solid #ccc;
}

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

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

footer {
    text-align: center;
    color: #777;
}