Last night, I was customizing various things in my child theme's stylesheet and template files and must've done something wrong because I ended up not being able to edit either pages or posts (everything else was fine). I could "view" them but couldn't edit them (or publish either, obviously). It just went to a "can't locate" 404 page.
During the 14 hours (and counting) that I've been working on this problem again today, I think I broke my site. Now when I type in the URL, nothing is there: as in a completely white page with no error code. I also can't access the admin area. I'm completely shut-out.
Among MANY other things, I've tried uploading last night's backup to the server from before I noticed my inability to edit and I overwrote everything there but that didn't fix the problem either.
I've now tried everything I can think of to no avail. I'm a WordPress novice and don't know what else to try. Can anyone please help me?
My website is .
Oh, one odd thing: my favicon is still showing in the browser tab.