I need a complete visual blueprint for both a responsive website and its companion mobile app, aimed squarely at selling products and services. The work begins with low-fidelity wireframes and progresses to polished UI screens so every user journey—browsing the catalog, opening a product page, adding items to the cart—feels seamless across platforms. The essential features in this round are the product pages and the shopping-cart flow. A payment module can wait until a later phase, but please keep the information architecture flexible enough to slot it in without a redesign. Figma, Sketch, or Adobe XD are all fine; realtime collaboration and easy asset export are what matter most. Include a mini style guide (colors, type, icons) and an interactive prototype that shows transitions and states. Deliverables • Low- and high-fidelity wireframes for both web and mobile • Final UI mockups for product listing, product detail, and cart screens • Clickable prototype covering the primary flows • Organized source files ready for developer hand-off Acceptance criteria • Consistent visual language across web and app • Works at standard web breakpoints and common iOS/Android sizes • Cart and product pages cover edge cases such as empty cart, variant selection, and quantity updates The timeline is flexible, but I expect clear progress updates and space for feedback at each milestone.