shopify/dawn ? reverse-engineered prompt

Build me a clean, fast Shopify storefront theme based on Dawn that I can use as a solid starting point for an online store.

I want it to feel modern and simple, with good defaults, strong mobile support, and the kind of layout that works well out of the box for home, product, collection, cart, and page screens. Please make it flexible so a merchant can edit the storefront in Shopify without touching code, and keep the markup and styling lightweight so it loads quickly.

Use Shopify’s theme structure with editable sections, snippets, templates, and localization support, and keep it server rendered where that makes sense. Make the experience polished but not overdesigned, and focus on accessibility, performance, and practical ecommerce features first. If you need to check current Shopify theme docs while building, go ahead and look them up online.