Design a full Shopify eCommerce website UI for a luxury fashion brand named “thenexby”. Style should be minimal, elegant, and high-end with beige, black, and champagne tones. Use refined typography, large spacing, editorial layout, premium product grid, clean navigation, and modern UI. Include homepage, product page, and brand story section. Inspired by Apple and high-fashion brands. Ultra clean, 4K, UI/UX case study style.