.c-product-skus-stocks__sku-stocks {
    display: none
}
.c-product-skus-stocks__sku-stocks_selected {
    display: block
}

.c-product-add-to-cart_mobile-modal .c-product-add-to-cart__skus-stocks, .c-product-add-to-cart_mobile-modal:hover .c-product-add-to-cart__skus-stocks {
    display: block;
    padding: 10px 5px;
    border-top: 1px solid #ccc;
}

.c-product-skus-stocks__sku-stock {
    margin-bottom: 5px;
}