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

Design policy: Compose using only leather colors. Three tiers: dark brown (#241a00) → gold (#a5843a) → cream (#f5f1e8). Photography uses dark, subdued tones, with white Mincho placed on top. - About COCOMEISTER: A brand built around "growing leather." Series names (Darlington, Bridle, Cordovan…) are the unit of product identification, and the site's navigation is structured as "leather/series → shape → product." - Density: High. As an EC site, cards are displayed in large numbers, but generous spacing between cards and open letter-spacing in headings suppress the sense of density. - Keywords: