body {
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
    line-height: 1.6;
}

header, main, footer {
    padding: 20px;
    max-width: 800px;
    margin: 0 auto;
}

header {
    background-color: #0055bb;
    color: white;
    text-align: center;
}

h1 {
    margin: 0;
}

main {
    background-color: white;
    margin-top: 20px;
    margin-bottom: 20px;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

footer {
    text-align: center;
    font-size: 0.9em;
    color: #666;
}