body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: #f8f9fa;
    color: #333;
}
header {
    background: #222;
    color: #fff;
    padding: 20px;
    text-align: center;
}
main {
    max-width: 900px;
    margin: 40px auto;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
h1 {
    color: #f1f1f1;
}
h2 {
    color: #111;
}
footer {
    text-align: center;
    padding: 15px;
    background: #f1f1f1;
    margin-top: 30px;
    font-size: 0.9em;
}