.wc-products .products .product,
.woocommerce ul.products li.product {
    display: flex;
    flex-direction: column;
    height: 100%;
}
.wc-products .products .product .woocommerce-loop-product__link,
.woocommerce ul.products li.product .woocommerce-loop-product__link {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
}
.wc-products .products .product .button,
.woocommerce ul.products li.product .button,
.woocommerce ul.products li.product .added_to_cart {
    margin-top: auto;
}