React is a free and open-source front-end JavaScript library for building user interfaces based on UI components. It is maintained by Meta and a community of individual developers and companies.

Tailwind CSS is a utility-first CSS framework packed with classes like flex, pt-4, text-center and rotate-90 that can be composed to build any design, directly in your markup.

React components can be styled using Tailwind classes directly in the JSX, which allows for rapid development and easy maintenance of a consistent design system.

Yes, basic accessibility is included. The question is a button for proper semantics and keyboard navigation. For more advanced use cases, you could add more ARIA attributes.