body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #005a87;
    color: white;
    padding: 20px;
    text-align: center;
}

section {
    padding: 20px;
    margin: 10px;
    background-color: white;
    border-radius: 8px;
}

.product-gallery {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.product {
    flex: 1 1 30%;
    text-align: center;
}

.product img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.ad-space img {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    display: block;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px;
}