You’re completely right, I didn’t know text-indent only pushes the first line to the left.
This made my life easier though, also the “!important”'s were causing issues.
I’ve made a new snippet and added a bunch of comments so you know what things you should change for your own layout since this will not work for every theme out of the box.
So you’ll def need to change some values to make it perfect. The comments should help you with that.
Screenshots:
headings-indent2.css (3.5 KB)
I’m not a CSS pro, it’s also been quite some time I’ve been using css, hence the fixes. Hopefully everything works out now 
Edit: I found a bug, I’m fixing it right now
Current bug I’m trying to fix:
