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

Design policy: An aggressive, tight streetwear aesthetic composed of just three colors: near-black (#222222) + white + light gray (#f5f5f5). A condensed bold typeface (HelveticaLTWXX-BoldCond) and negative letter-spacing (-0.65px to -3.1px) dominate throughout, producing a military, industrial sense of compression - Density: Information density is high. Product grids are arranged compactly with minimal whitespace. Only the hero area uses a large-format image + oversized condensed typography - Keywords: Condensed bold, negative letter-spacing, sharp edges (radius 0px), near-black #222222, milit