.wishlist-productcard:not(.hidden){
    visibility: hidden;
    opacity: 0;
}
.wishlist-productcard:not(.hidden).syk-wishlist-visible{
    visibility: visible;
    opacity: 1;
}

.product-card:has(.wishlist-productcard:not(.syk-wishlist-visible)):hover .wishlist-productcard {
    visibility: visible;
    opacity: 1;
}