body {
    font-family: Arial, sans-serif;
    background: #f9f9f9;
    color: #333;
    margin: 0;
    padding: 0;
}
header {
    background: #005f73;
    color: white;
    padding: 1rem;
    text-align: center;
}
main {
    padding: 2rem;
    max-width: 800px;
    margin: auto;
}
footer {
    background: #eee;
    text-align: center;
    padding: 1rem;
    font-size: 0.8rem;
    color: #555;
}
a {
    color: #0a9396;
}
a:hover {
    text-decoration: underline;
}