Tokyo Photographic Art Museum (TOP MUSEUM) Style Design System (DESIGN.md, Japanese UI)

Design policy: Photographs are the only color. The UI is a white and black 1px frame. No surface colors, no rounded corners, no shadows; divisions are made only with 1px or 2px black rules. The composition of placing exhibition posters at near-full size on white ground is close to a photo book spread. - About TOP MUSEUM: As a Tokyo metropolitan museum, opening status, admission fees, and accessibility are placed in prime real estate. In addition to the status line "The museum is open today (10:00−18:00)," the header permanently hosts color scheme toggles (Blue / Black / Yellow) and text size t