So, because I’m a complete n00b, I didn’t realize that I needed to create a child theme instead of modifying directly the theme I’d selected… so when an update was pushed to the theme I’d started from *poof* it was all gone. Annoyingly I’d read up on child themes and thought I should take care of that before the worst happened… and then didn’t make time before an update pushed that did it. Yeah.
So I’ve set up the child theme correctly now, but I haven’t finished correcting it the way I wanted it. So things may be a little messy for the short term here. Sorry!