body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    text-align: center;
}

header {
    background: #333;
    color: white;
    padding: 20px;
}

nav ul {
    list-style: none;
    padding: 0;
    background: #444;
    margin: 0;
}

nav ul li {
    display: inline;
    padding: 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
}

section {
    padding: 20px;
}

.product-list {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.product {
    background: white;
    padding: 15px;
    border: 1px solid #ddd;
    width: 200px;
}

footer {
    background: #222;
    color: white;
    padding: 10px;
    margin-top: 20px;
}