body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f9f9f9;
}
header {
    background: #004466;
    color: white;
    padding: 20px;
    text-align: center;
}
main {
    max-width: 800px;
    margin: 20px auto;
    background: white;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
h2 {
    color: #004466;
}
footer {
    background: #004466;
    color: white;
    text-align: center;
    padding: 10px;
}