Build a premium brand site for a luxury watchmaker. The hero experience is a real‑time 3D watch configurator with a luxury, sophisticated feel: shoppers can switch case materials, strap styles, dial colors, and add engravings, and see the changes instantly on a photorealistic model with accurate lighting and reflections. Complement this with story pages that use tasteful parallax to tell the brand’s heritage, and product detail pages that fetch pricing, variants, and inventory from a headless commerce backend. We’ll use Next.js and Three.js—please propose the UX/architecture and implement the configurator and data integration.