Something different. I have been using Markdown Footnotes extension [1] and found its syntax to be natural to Markdown. Here's the same sample as OP in Markdown Footnotes syntax. There is a link to the rendered page [2]. https://gist.githubusercontent.com/richsuca/f5a14ed9cb76e7ad... [1] https://python-markdown.github.io/extensions/footnotes/ [2] https://gist.github.com/richsuca/f5a14ed9cb76e7ad2f4f6b11361...
I think I'll copy some of the style from yours. I really like the smaller font size for the notes, the different font color, and in particular the link back to where the note was used! Double linked list, I love it!
Stylistically I like the more minimal look of (the lack of brackets, and I think n may change link color to black): https://ab1908.github.io/2021/08/24/footnotes-in-web-content...