GU Style Design System (DESIGN.md, Japanese UI)

Design policy: A sister brand of UNIQLO, but a fashion e-commerce site with a lighter impression thanks to its own GUNext custom font (Light / Regular). font-weight 300 is dominant, and "airy" typography is a characteristic throughout. A minimal composition that makes product photos and the red price display #ee0000 the stars - Density: An e-commerce layout centered on the product grid. Since both headings and body text are unified at weight 300, the impression is even lighter and more casual than UNIQLO - Keywords: Light Weight, Airy, Price-Focused, Minimal Palette, Affordable Fashion - Chara