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

Design policy: A gallery-like, editorial black-and-white design that feels like an architectural space translated directly into the web. Decoration is minimized, and structure is conveyed through whitespace and typographic hierarchy - Density: Generous whitespace. Content is arranged as if breathing, evoking the walls of a gallery - Keywords: architectural, gallery, monochrome, editorial, serene - Characteristics: Based on near-black #111111, with almost no decorative elements. Location tags are square black badges with no rounded corners, indicating each space within the facility (Spiral Gard