nitikad58/Phone-store-web-app ? reverse-engineered prompt

Build me a simple React web app for a phone resale store.

I want it to feel like a modern e commerce site where people can browse used and refurbished phones, open a product page, and see the price, condition, photos, and a short description. Make the homepage clean and easy to scan, with a few featured phones and a way to view the full catalog. Add basic shopping flow so someone can add items to a cart and review what they picked before moving on to checkout.

Keep the design responsive so it works well on mobile and desktop, and make it look polished with good spacing, cards, and clear buttons. Use the existing React app structure and keep it simple enough to run with the usual development and build commands. If you need any current React guidance or best practices, look them up online first.