css

body {
    font-family: sans-serif;
    margin: 2em;
    line-height: 1.6;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1em;
}

.gallery-grid a {
    display: block;
    border: 1px solid #ccc;
    padding: 0.5em;
    text-align: center;
}

.gallery-grid img {
    max-width: 100%;
    height: auto;
    display: block;
}

.product-page {
    display: flex;
    flex-wrap: wrap;
    gap: 2em;
    max-width: 800px;
    margin: 0 auto;
}

.product-page img {
    max-width: 50%;
    height: auto;
}

.product-details {
    flex: 1;
}

.back-link {
    display: inline-block;
    margin-bottom: 1em;
}