.custom-product-gallery {
        display: flex;
        flex-direction: column;
    }
    
    .main-image {
        margin-bottom: 20px;
        position: relative;
        overflow: hidden;
    }
    
    .main-image img {
        width: 100%;
        height: auto;
        display: block;
        transition: transform 0.3s ease;
    }
    
    .main-image:hover img {
        transform: scale(1.05);
    }
    
    .thumbnails {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .thumbnail {
        width: calc(25% - 8px);
        cursor: pointer;
        border: 2px solid transparent;
        opacity: 0.7;
        transition: all 0.3s ease;
    }
    
    .thumbnail:hover {
        opacity: 1;
    }
    
    .thumbnail.active {
        border-color: #007cba;
        opacity: 1;
    }
    
    .thumbnail img {
        width: 100%;
        height: auto;
        display: block;
    }
    
    /* Responsive */
    @media (max-width: 768px) {
        .thumbnail {
            width: calc(33.33% - 7px);
        }
    }
    
    @media (max-width: 480px) {
        .thumbnail {
            width: calc(50% - 5px);
        }
    }