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

Design policy: White ground, flat, a single point of red. No surface colors and no shadows; structure is built from whitespace and 1px outlines alone. The only saturated color is #ef3340, placed as "points" on bands, icons, button outlines, and the rectangles beside headings. - About ANDPAD: A construction-management SaaS for the construction industry. It is a product that bundles site photos, drawings, schedules, and costs into one, and the site likewise adopts a structure of "real site footage → organized information." - Density: Medium-to-low density. The KV is a full-width live-action site