I need a web portal that lets both customers and clients sign in to view and manage side-by-side cost comparisons of products. After logging in, a customer should immediately see clear tables that show the current price together with key product specifications; a client should see the same data plus a small dashboard where they can upload or edit their own product entries. The product categories are still open, so please build the comparison engine and database structure in a way that lets me drop in electronics, clothing, home appliances—or any future line—without code changes. Clean, mobile-first UI/UX, role-based authentication, and fast search or filter features are essential. Final hand-off should include: • Fully responsive front-end (React, Vue or similar) • Secure back-end with separate customer and client roles (Laravel, Node, Django—your choice) • Structured database ready for dynamic categories, prices, and specifications • Brief deployment notes and a test dataset so I can verify price & spec rendering right away If you can demonstrate a past cost-comparison module or a sleek multi-role login flow, that will help me decide quickly.