This repository stores some css I commonly used
https://github.com/Shelton212/obsidian-snippets/blob/master/clutter-free-headings.css
WYSIWYG-ish headings which line up headings, show the formatting markers when editing and replace them with a muted "H1", "H2" etc when not the active line.
I modified it based on this version because it only works on legacy editor