Responsive Four Card Section Using Flexbox

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

I'm proud of using flexbox to set up card in a visually appealing way.

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

The most difficult part was the card organization in the middle. It was obvious I needed 3 columns for the set up but having no prior experience with flexbox it was difficult setting that up. My solution was to use 1 large flexbox container set to the row direction to center all the cards. Then using a column class to integrate the 3 column layout. Easy money.