Some of the best articles on web design I've seen:
* https://zen-of-programming.com/design/ covers various design topics
* https://practicaltypography.com/ covers typography
* https://brutalist-web.design/ covers simplicity
And some required reading on CSS:
* https://mxb.dev/blog/the-css-mindset/
I'm maintaining this list at https://odysseus.adrian.geek.nz/developer/webdesign.html