.product-gallery {
    white-space: nowrap;
    width: 100%;
    overflow-x: auto;
    margin-bottom: 5px;
    padding-top: 1px;
}

.product-gallery a {
    display: inline-block;
    margin: 0 5px;
    padding: 0;
    background-color: #fff;
    overflow: hidden;
    border: 5px solid #fff;
    height: 150px;
}

.product-gallery img {
    transition: all 0.5s ease;
}

.product-gallery a:hover img {
    -webkit-filter: brightness(1.1);
    filter: brightness(1.1);
}

.product-gallery img:first-child {
    margin-left: 0;
}

.product-gallery img:last-child {
    margin-right: 0;
}