margins ipad

Simple question:
however I use the responsive theme Twentythirteen, when viewed on Ipad the margins are really bad. There is no left margin to regular text, nor footer. I’ve tried to adjust this by changing things in the “* 8.0 Media Queries” section in the CSS, but can’t find the right things to change. What exact location should I be working in?

https://saskialensink.nl/contact/

Would be great if someone could help me fix this..!