webRace-Sami/E-Store ? reverse-engineered prompt

Build me a simple online store frontend called E Store.

I want it to feel like a real shopping site, with a clean homepage, a product grid, product cards with images, prices, and quick add to cart actions. Include a product details view, a shopping cart page or sidebar, and a basic checkout flow that looks complete even if it is just a demo. Make it responsive so it works well on mobile and desktop, and keep the design modern and easy to browse.

Use the existing React app setup and keep everything in JavaScript. If you need product data, just mock it out for now with a few categories like clothes, shoes, and accessories. Add simple search or filtering if it fits naturally. Please make the app polished, usable, and ready to extend into a real MERN store later. If you need current docs for anything, look them up online.