@kirby Ah ok sorry, I didn't get this from the original ask :D
I don't know of any tools that can do the full package, but there are tools that take a HTML file and generate the CSS body for you ( https://atom.io/packages/html-to-css for example) - you could then just try your styles directly inside the CSS with a bit more convenience.
Good luck on your search - hope you'll find something neat :)
@kex_nom Not at all, no 😅
I'm looking for something where I can open a HTML file and change the way it looks, and it spits out a CSS file for me to apply to that HTML file.
That's the ideal.