datweb07/nextjs-mini-project ? reverse-engineered prompt

Build me a clean, polished Next.js starter site from this project. I want the homepage to feel like a real product landing page instead of the default template, with a nice hero section, a short explanation of what the app does, a couple of feature cards, and a clear call to action.

Make it responsive, modern, and easy to read on mobile and desktop. Keep the styling simple and tasteful, and use the existing app structure so it runs right away with the normal dev command. If you need to check current Next.js docs or best practices, go ahead and look them up.

Please also make sure the page looks finished, not like boilerplate, and keep the code organized so it would be easy to add more pages later.