I like Tailwind a lot, but for anyone else reading, you still need to purge css classes to not end up with a very large css file (187kB gzipped) [1]. This requires a build step with PurgeCSS. (I haven't checked, but maybe Netlify offers a build step that will do this for you...)

I also like Tachyons [2] for utility-based classes, which is pretty small (14kB gzipped).

[1]: https://tailwindcss.com/docs/controlling-file-size

[2]: http://tachyons.io/