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

Design policy: Build structure on a white background using a single ISHIYA Blue #005bac. Large scenic photographs of Hokkaido's snow and sky are laid down, and the UI sits lightly on top of the photos. Decoration leans on rules and letter-spacing, with almost no shadows - Density: Relaxed. The container is fixed at 1040px, leaving large margins on both sides - Keywords: Indigo blue, snow, wide letter-spacing, rectangles, Playfair Display