This entire site is static. All the visualizations are running completely in the browser.
I use Hugo to build the site. It’s pretty neat, since its template language lets me program a lot features statically, without any JavaScript. Even the on this site is statically rendered!
The theme is based off of Typo by tomfran, but I’ve made a bunch of UI tweaks to my liking (like the slick Table of Contents on widescreen).