Responsive website design using mobile-first approach and Tailwind Css

It was my first time using tailwind css and I became a fan of it. It took me some hours to make this but I know this design isn't perfect and I had spent time like resolving the problems like why my body wasn't taking full width and height on small interface and tailwind prefers mobile first approach during making responsive design. I fixed it using some weirdo technique. Indeed will work more on this framework. As always, suggestions and best practices will be appreciated.