i collect these for fun! adding to my collection https://github.com/sw-yx/spark-joy/blob/master/README.md#dro...

more like this:

- https://andybrewer.github.io/mvp/ mvp.css

- https://yegor256.github.io/tacit/

- https://github.com/alvaromontoro/almond.css has thin fonts

- https://picocss.com/ Elegant styles for all natives HTML elements without .classes and dark mode automatically enabled.

- https://simplecss.org/demo 4kb incl dark mode

- https://watercss.kognise.dev/ Small size (< 2kb)

- https://github.com/xz/new.css (https://newcss.net/) 4.8kb sets some sensible defaults and styles your HTML to look reasonable

- https://github.com/oxalorg/sakura supports extremely easy theming using variables for duotone color scheming. It comes with several existing themes

- https://github.com/susam/spcss