Tailwind is more like you create lot of (utility) classes in your styles.css file that tweak just one styling property like a font, a color or a margin, and then reuse those classes to style each of your UI components like buttons and headers.

With traditional CSS, you would assign a class to each UI component and then write custom CSS for each one. Usually people try to share CSS between classes but then you have to be really careful you don't break unrelated components as you make changes later.

Read the Tailwind links above to understand more about the pros/cons of each approach.