I am building a professional, corporate-looking learning platform that must work seamlessly on both the web and a companion mobile app. The scope covers end-to-end UI/UX design as well as the complete product architecture needed to launch a minimal viable product that scales. Core functionality to map out and prototype: • User registration and profile management • Course creation, editing, and administration dashboards • Secure payment processing with clear purchase flows I already have rough content outlines; what I need from you are high-fidelity wireframes, pixel-perfect screens, a responsive design system, and clickable prototypes that demonstrate each flow across desktop, tablet, and mobile breakpoints. Source files should come in Figma (or Sketch if preferred) with organised layers, reusable components, and style guidelines so my engineering team can implement without guesswork. Please plan for two feedback rounds after the initial delivery to fine-tune typography, colour palette, and micro-interactions while keeping to the clean, corporate aesthetic. Final hand-off will include all design assets, exportable icons, and a short walkthrough video explaining navigation logic and component usage.