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

Design policy: Place utility goods reminiscent of warehouses, industrial products, and found objects on a pure white gallery ground (#ffffff). Compose all text in serif (Cardo), forming a quiet editorial with only ultra-thin gray rules #d9d9d9 and black zero-radius buttons - Density: Low density. Place smallish text (13–14px as the base) with wide line spacing, dividing areas not with fills but with whitespace and ultra-thin rules - Keywords: industrial / vintage / found object / gallery / serif editorial - Shape language: All surfaces, buttons, and input fields use border-radius: 0. CTAs are