body {
    font-family: Arial, sans-serif;
    background: #111;
    color: #eee;
    margin: 0;
    padding: 20px;
}

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

nav {
    background: #333;
    padding: 10px;
    text-align: center;
}

nav a {
    color: #00ccff;
    margin: 0 10px;
    text-decoration: none;
}

.card {
    background: #222;
    padding: 20px;
    margin: 20px 0;
    border-radius: 10px;
}

footer {
    text-align: center;
    padding: 20px;
    background: #222;
}