Four card feature section using CSS Grid

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

I'm pretty happy because I was able to complete the challenge in the time that I had estimated ( 1hour and 15 minutes) and I was able to achive a pretty good result.

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

I had some problems while I was placing the cards in the grid but I was able to overcome that by drawing the structure that I wanted to achieve.

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

In the last media queries I had to declare the postion of the cards because even if I setted the 'grid-template-columns' to '1fr' it was still displaing two columns. I did not found a way to fix that. Corrections and advices are welcome.