Styling Woocommerce under High End

So I’m trying to apply some of the suggestions here: https://www.kolenda.io/newsletter/2025-01-09
in styling my woocommerce store.

My problem is, no matter what CSS I add to the high end options or the store page, nothing seems to have any effect at all. I’ve tried to style through border as well as through outline. Here is the CSS I have on the store page:

.woocommerce .products .hb-woo-product {
padding: 10px;
margin: 10px;
outline-style: solid;
outline-color: #bfaf9c;
outline-width: 1px;
}

Doesn’t matter if I use border instead of outline however, same nonexistent effect. Normally I just hammer stupidly at the CSS until it looks like I want it to, but now nothing does anything…

What am I doing wrong?