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

Design policy: Organize the large volume of information typical of a major corporation's site using only achromatic grayscale and rectangles with zero corner radius. Drastically limit the number of colors, using the brand red #e60039 only for the logo and hover states. - Density: High density. The standard structure of a major Japanese manufacturer: global header + mega menu + business domain tiles + contact block + massive footer. - Keywords: Earnest / Moderate / Universal design / High information density / Achromatic - Shape language: Zero corner radius (border-radius: 0) is the principle.