DTC storefront with Stripe checkout

Build a direct-to-consumer storefront for a small brand owner.

Core features:
1. Product catalog with variants (size, color) and stock
2. Cart + Stripe checkout with guest option
3. Order confirmation email + order history for signed-in customers
4. Simple admin to add/edit products, mark orders fulfilled

Data: products, variants, orders, order_items, customers.
Must-haves: mobile-first, SEO tags per product, image gallery, discount codes.