HTML/CSS Card Component Challenge

Hi! I used this challenge to return back to learning coding after a period of not doing it.

Some things I had trouble with, but would like some feedback on:

• The rounded corners thing. Couldn't get it to work on the container, so I put them on the individual cards and played with negative margins. Must be a better way to do this I think? Any suggestions?
• The rounded corners - but vertical. Due to the margins applied on the desktop view, the two bottom cards where slightly shifted to the left. Tried to overrule this with @media, but didn't really work. So I put negative margins on all cards and compensated it with 10px padding in the @media.

Thanks in advance for feedback!