I’ve some problems with the GreatMag theme. I hope someone can help me.

The struggle is that I think there is a lot os wasted space on mobile and the font size is to small.

Here follows a picture of how I would like it to look:

and you can see how it looks right now here:
Can anyone help me with some extra CSS that helps?

I’ve tried to change the font size but it altso infects the text in a box with price comparasion that I wanted to be excluded from the font size changes – what to do? If you want see what i’m talking about with the price comparasion, please follow this lInk [ redundant links deleted ]