Site not appearing correctly on iPhone

My site (https://themckenziefirm.com) is not showing up correctly on iPhones. The content area is shrunk a little bit and the text is overrunning the border, into the background. If you don’t have an iPhone handy, you can see what I’m talking about here.

Any chance there’s an easy fix to this? I’m so happy with how my site looks everywhere else. It’s killing me to have it look so awful in this one spot.

I’m using the twenty eleven child theme.