body {
    margin: 0;
    background: #000;
    color: #fff;
    font-family: Arial, Helvetica, sans-serif;
}

header {
    text-align: center;
    padding: 50px;
}

main {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    padding: 20px;
}

.card {
    width: 250px;
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 12px;
    padding: 25px;
    text-align: center;
}

.card h2 {
    color: #fff;
}

.card a {
    display: inline-block;
    margin-top: 15px;
    padding: 10px 18px;
    background: #444;
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
}

.card a:hover {
    background: #666;
}

footer {
    text-align: center;
    padding: 40px;
    color: #aaa;
}