body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}
header {
    background-color: #ffcc00;
    padding: 1rem;
    text-align: center;
}
nav ul {
    list-style-type: none;
    padding: 0;
}
nav ul li {
    display: inline;
    margin: 0 15px;
}
section {
    margin: 20px;
    padding: 20px;
    border: 1px solid #ccc;
}
footer {
    text-align: center;
    padding: 1rem;
    background-color: #ffcc00;
}