I designed a working prototype of a wellness brand's store on a placeholder brand: homepage, collection page, 12 product pages, a campaign landing page and a cart, all from one catalog structured like Shopify products (handle, product type, tags, two variants, collections). Every step of the shopping journey is a real link or button on its page. Browsing by need from the homepage reaches the cart in 3 taps on desktop and on phone, against 6 and 9 in a navigation-first layout; a landing-page visitor adds a three-product routine in 1 tap. Discovery: shop-by-need tiles and filters with live counts over 17 facet values, none empty. Conversion: all 96 checks pass across the product pages (price, rating, preselected size, subscribe saving, free-shipping progress, sticky add to cart on phones, cross-sell, image labels), and the cart names the cheapest item that crosses the $60 free-shipping line. Phone layout under 760 px with 44 px tap targets.