I recently came to the conclusion that the best way to write CSS is through a Design System and write all the CSS yourself. And when I say Design System - I mean it can be your own or it can be external.

The problem with writing a lot of CSS is that you will eventually run in circles and repeat yourself on the same elements with only small differences. A design system lets you adjust it all at once through Variables, and as of recently - some of the more powerful Selectors and Pseudo-classes.

It also makes it easier to switch a design so you don't inherently lose all your work.

I don't have a strong opinion on Tailwind CSS because I don't use it but I am familiar with it. I know it hasn't been adopted inside CMS's all that much, but it is very popular when it comes to things like individual elements (cards, headers, etc.) because those individual elements will work universally across any Tailwind project.