[molly0x57]

It's just plain ol' HTML and CSS, plus a little JS that will highlight the corresponding annotation if someone clicks the highlighted text.

https://github.com/molly/website-v2/blob/master/src/pug/page... https://github.com/molly/website-v2/blob/master/src/sass/rev... https://github.com/molly/website-v2/blob/master/src/js/revie...

It's all open-source, so by all means feel free to reuse it if you like!