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

Design approach: A total beauty brand from Ebisu, Tokyo. It offers hair care, nail care, scalp care, and fragrance, and also operates a salon business. A dual font system (Zen Kaku Gothic New + Instrument Sans) coexists the softness of Japanese text with the modernity of Western text. A quiet, refined worldview based on white and charcoal gray (#333). Large statement text and generous whitespace embody the brand philosophy "toward the joyful and the beautiful" - Density: A spacious brand-site style. A simple structure in which statements, product carousels, and news are arranged vertically. Th