I did not get any reply about my request! I was asking to have a boarder around the whole product card and the code you provided did not work.

I used this code and it worked but only on PC and tablet view, it did not work on mobile view.

.woocommerce div.products.buttonsappearunder div.product, .woocommerce.wc-shortcode.carousel:not(.no-gutter) div.products.buttonsappearunder div.product {
margin: -0.5px!important;
border: 1px solid #999999;
}

Kindly help me in how to apply the same boarder on the mobile view.

Thanks,