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

Design policy: A skincare brand launched in 2017 by dermatologist Masakazu Shigeta. Under the theme of "the seasons of Japan and the moods within daily life," it is an introspective, naturalistic editorial style built on deep forest dark green #1b281d and beige #ddd9cf. Graphics are restrained; atmosphere is created through typography and whitespace. - Density: Body text is small at 12.6px with high density, and a letter-spacing of 0.06em creates a "typography meant to be read." Product pages and reading content (OSAJI Journal) are central. - Keywords: skincare, dark green, Noto Sans Japanese,