Ecwid/ecwid-nextjs-commerce — reverse-engineered prompt

Build me a modern storefront for my Ecwid shop using this repo. I want it to feel fast and polished, with a clean home page, product listing pages, product detail pages, a cart, and checkout handled through Ecwid. Please make sure it works well on mobile and desktop, has automatic light and dark mode based on the user’s system, and includes good SEO basics so products and pages have solid titles, descriptions, and social sharing previews.

Use the environment values from the example file so I can connect my Ecwid store ID, API key, company name, and site name. Keep the setup simple so I can run it locally and also deploy it to Vercel without much fuss. If there’s already support in this template for better search or performance features, keep those in place rather than reinventing anything. Look up current docs online if you need to.