Problem button-card custom

Hi everyone, I use custom button-card, but how can I change the shape of the card? until the penultimate update the cards had rounded edges, but now they have pointed edges and the curves have disappeared, does anyone know if there are any parameters to change after the latest updates?

https://community.home-assistant.io/t/rounded-corners-gone/713389

Can you post the code? I have an entire dashboard of custom:button-cards and I haven’t had any issues.

That should be because of the theme you are using. Try to change to a different one an see.

You can change the corners individually with

styles:
 card:
   - border-radius: 10px 

Change the number as your preferred