imajij/mern-food-ordering-app-frontend ? reverse-engineered prompt

Build me a modern food ordering frontend for a restaurant app. I want people to be able to browse menu items, add them to a cart, change quantities, remove items, and see the total update right away. Include sign up and sign in, keep the user logged in with JWT, and make a simple checkout flow where they can enter delivery address and payment details before placing an order.

Please make it feel polished, with a dark theme, nice glassy styling, and a layout that looks good on phone, tablet, and desktop. Use React and connect it to the backend API through an environment variable, so it’s easy to point to localhost or a live server. Add basic client side validation with friendly error messages, and make the navigation smooth with different pages for browsing, cart, auth, and checkout.

If you need to check current best practices or API usage, look up the latest docs online.