body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
    color: #333;
}

nav ul {
    list-style: none;
    background: #333;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    text-decoration: none;
    color: white;
    padding: 10px 20px;
    display: block;
}

footer {
    text-align: center;
    padding: 20px;
    background: #333;
    color: white;
}

article {
    margin: 20px auto;
    padding: 15px;
    border: 1px solid #ddd;
    background-color: #fff;
    max-width: 600px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

article h2 {
    margin: 0 0 10px;
    font-size: 1.5rem;
}