abuanwar072/E-commerce-App-UI-Flutter — reverse-engineered prompt

Build me a clean, modern mobile shopping app in Flutter for iPhone and Android. I want it to feel like a polished ecommerce UI demo, not a full store with payments or accounts. The main screen should show products grouped under a horizontally scrollable set of categories, with a nice visual layout that feels easy to browse. Tapping a product should open a details screen with the product image, price, a short description, and a big Buy Now button. It would be great if each product details page picked up that product’s own color theme so the screen feels more branded and eye catching.

Please make it look smooth and consistent, with good spacing, modern styling, and reusable components. Use mock data and local assets where needed so it runs out of the box. I mainly care that the UI is clean, responsive, and easy to demo. If you need to, look up current Flutter docs online and fill in any small gaps.