Thank you! I will remember this for the next time I screw something like this up, LOL!
But it occurred to me to ask my host (Siteground) if they could restore the files I had accidentally deleted and they did, quite quickly! And everything is back up and running! Super easy solution! AND they showed me how I could do this myself next time with the backup tool that I didn't even know existed before! So YAY for tools that help fix things that I will certainly screw up again in the future!
And I've learned a big lesson! In the future I won't delete anything from cpanel, but will stick with deleting directly from Moodle, as I'm sure it would have not let me delete the themes that would have broken it! But hey, I learned some pretty valuable lessons all around here, so it was not a complete waste of time!
Thanks again! Have a great weekend!