body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
}
header {
    background-color: #004080;
    color: white;
    padding: 10px;
    text-align: center;
}
nav a {
    margin: 0 10px;
    color: white;
    text-decoration: none;
}
footer {
    text-align: center;
    padding: 10px;
    background-color: #004080;
    color: white;
}