.woocommerce-product-gallery__image {
    border: 2px solid transparent;
    transition: border-color .2s;
}
.woocommerce-product-gallery__image:hover {
    border-color: #0073aa;
}
.cdn-lightbox {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}
.cdn-lightbox img {
    max-width: 90%;
    max-height: 90%;
}
.cdn-close {
    position: absolute;
    top: 30px;
    right: 30px;
    font-size: 2rem;
    color: #fff;
    cursor: pointer;
}