james247-eng/Safpedia-oo ? reverse-engineered prompt

Build me a clean web app for a marketplace called Safpedia, with a simple customer side and a basic admin dashboard.

I want people to be able to sign up, sign in, browse categories, open product details, and go through a checkout flow that ends on a payment success page. There should also be a vendor store view and a separate vendor product details page so sellers can show their items clearly.

Please make the main pages feel connected and easy to move through, with a polished landing page, login and signup screens, and a few useful sections for marketplace browsing. If it makes sense, use Firebase for the auth and backend pieces, and keep the UI modern and responsive so it works well on desktop and mobile.

I also want the admin area to feel like a real dashboard for managing the marketplace, with a place for reports or notifications if needed. If you need to check current docs or best practices for any library, go ahead and look them up online first.