Post contents too far to the left?

Nirvana theme. Ive seen other people with this issue, but Ive never found a fix. Basically, the posts are displayed too far to the left. I can change all the settings, but changing the “Margins Left/Right” options dont do anything, even with the “boxed” option selected. My site is https://toprowgames.com What should I do? I cant seem to figure out how to fix this, and it makes the blog awkward to read.