Mobile first responsive four card feature section

What are you most proud of, and what would you do differently next time?

I was proud that I got the 4 cards layout to work on both mobile and desktop. I think I should still spend more time getting the overall layout right before trying to style the individual components.

What challenges did you encounter, and how did you overcome them?

Other than the trying to get the 4 card layout working it was challenging for me to get the styling right on the individual cards. I think just focusing on the basics like flexbox and breaking down the design into smaller parts helped.

What specific areas of your project would you like help with?

I think my layout looks ok on larger screens and smaller mobile devices but I don't think my layout looks good between those two extremes (smaller desktops or larger mobile devices). Any advice on making sure my design looks good on medium sized screens would help.