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

Design policy: An editorial design built on a monochrome base, composed with whitespace and thin lines. A refined serenity like a fashion magazine - Density: Compact line spacing (body line-height 1.15) and uniform letter spacing (0.05em) set text somewhat tightly. Information density is high, but the balance of whitespace keeps it from feeling cramped - Keywords: Monochrome, editorial, refined, serene, fashion - Characteristics: - A combination of Inter (Latin) + Noto Sans JP (Japanese). The font-family places Inter first, prioritizing Latin script - palt enabled globally. font-feature-settin