body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background: #ffffff;
    color: #222;
}
header {
    background: #003366;
    color: white;
    padding: 2rem;
    text-align: center;
}
main {
    padding: 2rem;
}
section {
    margin-bottom: 2rem;
}
footer {
    background: #f4f4f4;
    text-align: center;
    padding: 1rem;
    font-size: 0.9rem;
}
a {
    color: #003366;
    text-decoration: none;
}