However, Tailwind is definitely not the solution, as it is the same as adding a style attribute to each html tag and writing the style in the html. What is valuable about Tailwind imho is the concept of utility classes, which can be accomplished with vanilla css variables.
Now I use tailwind and I've learned their wonderful little syntax for mr-x or py and it does feel a little like inline style days. But I do make this file https://github.com/andrewarrow/settle-down/blob/main/assets/... with some stuff so I can say like "btn-main" over and over.
I would recommend you to try Open Props [0], which you can use with Tailwind CSS, and see how what we all really crave is a good utility class system.