Testimonials grid section

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

I feel like this project took me less effort and I really feel like I've improved a lot since the first project, and that's what I'm the most proud of.

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

I was struggling for a while with centering the layout and I ended up using flexbox on the html tag, but I'm almost certain that's not the best practice.

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

I got a few...

1. While checking the page on the responsive design mode I noticed that on bigger tv sized the design either looked too small or too bloated and I don't know what's the best choice on those larger screen sizes.

2. I'm terrible with box-shadows any tips are welcome.

3. For whatever reason my design on the comparison looks different from the one in github.

4. Where am I suppose to put the h1 tag if there is no title?

5. Any other criticisms are welcome.