WP Content folder emptied?

Hello: I copied my style.css file and made a simple font px size change. I logged onto my FTP using FileZilla and couldn’t locate the css file to replace it.

Upon looking further my entire wp-content folder is now empty. Of course I get the white screen and my WP dashboard states “ERROR: The themes directory is either empty or doesn’t exist. Please check your installation.”

The site worked before I logged onto my FTP site to update the css file. How could I have messed up my site so easily?

Thanks for any ideas. - Mike P.
Okay - I see I can restore my SQL database. Not sure which option to choose?

Mods please close this thread. I created new folders/directories and dropped in my backup theme folder. Site is back!