Responsive Bento Grid using Grids

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

having finished the challenge!

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

I found it difficult to define the grid and its characteristics.

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

I think I'm not using a good method to define font measurements, paddings, etc. I would like if someone can tell me where to study a little about it. especially responsive design!