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

Design approach: A Tokyo leather and paper goods brand founded in 2000 by Mike Abelson and Yoshie Furuuchi. A quiet editorial style built on a Swiss-style grid and a warm off-white #fffffb reminiscent of washi paper. Color and decoration are kept to a minimum, letting product photography and the texture of materials take center stage - Density: Generous whitespace; body text is a conventional 14px / line-height 1.6, but the information density is extremely low. Wide letter-spacing: 2px is applied to headings, giving the typography room to breathe - Keywords: leather goods, stationery, warm off