Steps to reproduce the issue

Total Joomla / web developer beginner here, so pardon my lack of jargon ability, but the home page (only) of my site, www.OutpostMagazine.com is displaying seemingly as an html index. I uploaded a new article and iFrame this morning but the site looked fine after that. Seems to be CSS disconnected but I also have no idea what I'm talking about.

Expected result

For the site to be normal.

Actual result

It is not.

System information (as much as possible)

Joomla 3.3.6, currently Chrome/Safari on a MacBook though primarily Windows 10. (This error happened on my home computer, not at the office.)

Additional comments

Thanks for your help and patience!