.quickzoom-button {
    opacity: 0;
    transition: opacity .25s ease-in-out;
    -moz-transition: opacity .25s ease-in-out;
    -webkit-transition: opacity .25s ease-in-out;
    pointer-events: none;
}
.product-item:hover .quickzoom-button {
    opacity: 1;
}
.swiper { width: 100%; height: 100%; }
.swiper-slide { text-align: center; display: flex; justify-content: center; align-items: center; }
.swiper-slide img { display: block; width: 100%; height: 100%; object-fit: cover; }