Tailwind CSS is a utility-first CSS framework . It gives us ready-made utility classes like: flex text-center p-4 rotate-90 We use these classes directly inside HTML or JSX to build designs quickly. Instead of writing custom CSS again and again, Tailwind already provides hundreds of small reusable classes. What does “Utility-First” mean? A utility class does one small job only . Example: w-12 → sets width h-12 → sets height text-center → centers text flex → makes flexbox layout We combine many small classes together to create complete layouts and designs. Easy Way to Remember Think like this: Normal CSS You write your own CSS: .box { width : 48px ; height : 48px ; display : flex ; } Enter fullscreen mode Exit fullscreen mode Tailwind CSS You use ready-made classes: <div class= "w-12 h-12 flex" ></div> Enter fullscreen mode Exit fullscreen mode So Tailwind means: “Don’t write CSS from scratch.…