I have located your problem. It is font-size: .75rem; and font-family: "AtlasTypewriterRegular", "Andale Mono", "Consolas", "Lucida Console", "Menlo", "Luxi Mono", monospace;
I have corrected this issue in my browser. Can you please correct this issue for the sake of the vision of the rest of the community? Unless you have stock in eye glass manufacturing, of course. Then I would understand your plan for sustaining this without ads.
PS - Web Typography 101: font-size: 100%; is a good thing for blocks of text you wish people to read. Also, there's a reason those pesky "web-safe" fonts are still around and in such high usage--they're legible.