Responsive solution to testimonial grids using pure css

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

I am proud of figuring out how grids work although i currently am still having some problems with their structuring and manipulation

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

I encountered the challenge of making the grid columns the right size and overcame them by just setting an extra column width per column

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

I would like some help with reducing the size of my grid by scaling it down so that it matches the given screenshot. my current solution matches the other content perfectly but is a little too big and nothing seems to scale is down.