[Feature Request] A Question about the H1 Divider cssclass

[ProudBenzene]

Hello dear developer, this issue is mentioned because I'm having some problems modifying the theme CSS.

My need: to enable the divider for first level headings only in a small number of notes that I need, i.e. anp-h1-divider feature.

My attempts: turned off the hi divider option in style settings, added cssclass: anp-h1-divider to the target note's metadata, but it didn't work in reading mode as before, instead, it only worked in the preview mode.

I have no idea about how to modify the css file to contribute to my goal. Could you please tell me how to solve this problem and fulfill my needs?🥲