body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    color: #222;
}

header {
    background: #222;
    color: white;
    padding: 40px 20px;
    text-align: center;
}

main {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

section {
    background: white;
    padding: 25px;
    margin-bottom: 20px;
    border-radius: 8px;
}

h1,
h2 {
    margin-top: 0;
}

footer {
    text-align: center;
    padding: 20px;
    color: #666;
}