Changing text size in gallery block on mobile only?

Hi all! 

Using the text feature within a gallery to create a two-sided look for my desktop site. On mobile, I think the padding is making it so my text appears out of place. I have managed to change the size, line height, and letter spacing, but can't adjust the padding. Any ideas? URL can be found here, and I attached a screenshot.

I was also wondering- and perhaps this would solve/negate my first problem- if it was possible to make the image and text into stacking blocks instead of appearing side by side on mobile?

Thanks so much in advance!

Did you solve? your site different screenshot. @kiellsworth