Four card feature section using Flexbox

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

Having some experience with Flexbox made this challenge manageable for me. For my next project, I plan to practice using CSS Grids, which appears to be really good for creating responsive designs.

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

I don't know anyone who can craft good box shadows using only code, and I'm in the same boat. I had to resort to an online tool (referenced in the README file), which was really helpful in getting it right.