Responsive testimonials section using CSS grid

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

I really like the effect I was able with a box-shadow that uses the testimonial card's colors, and the fairly fluid responsive layout at any resolution.

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

The biggest challenge I had here was the layout for the author name and avatar. I would have liked a little less markup, but I think what I came up with works pretty well.

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

Any feedback is appreciated. Thanks!