I want to change the button circle to square

[next2]

I edited cord "Add to cart" that section.

It changed circle to square !!

using this cord.

<style>
.btn, div[role="button"] {
border-radius:5px ! important;
}
</style>

but I want to make it another thing.

under the "Add to cart" ,I want to change "Buy it now" circle to square as well . help me.

thank you

[oscprofessional]

Hello,
Please share your site url.
So that I can check and let you know the exact solution here.