E-Commerce UI Design, Payment Gateway

I’m building a new e-commerce site and the visual side has to shine. My top priority is a clean, intuitive User Interface that guides shoppers effortlessly from landing page to checkout. Along with the look and feel, I need the design prepared to accommodate a secure payment gateway right from the start, so layout decisions must leave space for card input fields, digital-wallet buttons and all related trust badges.

Here’s what I expect:
• High-fidelity UI mock-ups for the full shopping flow (home, category, product, cart and checkout).
• Responsive HTML/CSS once the mock-ups are approved, ready for any common front-end framework I choose to plug in later.
• Design assets delivered in an editable format (Figma, Sketch or XD), plus exported web-optimised images.
• Clear hand-off notes specifying font families, colour palette, spacing and component behaviour so back-end integration of the payment gateway goes smoothly.

If you have recent examples of sleek e-commerce interfaces—especially ones that already house Stripe, PayPal or similar modules—share them so I can see how you solve for clarity and trust. I’m ready to move quickly once the visuals feel right.