Tailwind CSS is a utility-first CSS framework that provides low-level utility classes that you can use to build custom designs directly in your markup.

Why Tailwind?

Unlike traditional CSS frameworks (like Bootstrap), Tailwind doesn't come with pre-built components. Instead, it provides a set of highly customizable utility classes (e.g., `flex`, `pt-4`, `text-center`, `bg-blue-500`) that allow you to build unique designs without writing custom CSS.

Benefits of a Utility-First Approach

Faster Development: Build designs directly in your HTML/JSX without constantly switching between CSS files.
No More Class Names: Avoid thinking up semantic class names that often don't map well to your design.
Highly Customizable: Tailwind is extremely configurable, allowing you to define your design system (colors, spacing, fonts) and use those values across your project.
Smaller File Sizes: With PurgeCSS (built into Tailwind CLI and PostCSS setup), unused CSS is removed in production builds, leading to tiny CSS files.

While the initial learning curve might involve getting used to writing many classes, the speed and flexibility it offers quickly make it a favorite for many developers.