This is useful. I use a similar setup to convert online articles worth understanding in depth into a standardized, Tufte-like format to print in my preferred font/size/spacing and to leave the right-hand 40% of the page blank for making handwritten notes.

Article--> markdown via Marky or similar --> Marked app [1] --> apply CSS --> print --> annotate.

[0]: Marky — https://heckyesmarkdown.com/

[1]: Marked app — https://markedapp.com/