awwsafali/reactjs — reverse-engineered prompt

Build me a simple polished React starter site from this blank Create React App project. I don’t have a specific product idea in the repo yet, so make it a clean one page demo that feels ready to customize.

I want a nice home screen with a friendly headline, short intro text, a call to action button, a few feature cards, and a small footer. Make it look modern, responsive on phone and desktop, and easy for me to edit later. Keep the code simple and organized inside the existing React setup, without adding unnecessary complexity.

Please replace the default React starter screen, clean up anything unused, and make sure the app runs with npm start and builds without errors. Use plain CSS or whatever is already available in the project. If you need to check current Create React App or React docs, look them up online.