Went ahead and flipped both of my "width" overrides to "max-width". Amusingly to me, the worst part of the pages, now, it seems is the MathJax stuff. That said, I'm not seeing an obvious difference in my mobile firefox, just chrome. Still not entirely sure how I would even want these to look there. If you have a good pointer for a site that styles code decently on mobile, I'd love to take a look and see about emulating/stealing.