1LDK Style Design System (DESIGN.md, Japanese UI)

Design policy: Ultra-minimal. Decoration is stripped away to the limit, and the composition consists solely of typography and whitespace - Density: Extremely low. A fashion-editorial "pull-back" layout. A large slide hero, a limited number of elements - Keywords: Minimal, monochrome, Latin-script-driven, editorial, select shop - Characteristics: The Latin typeface Montserrat dominates the entire site. For Japanese text, Noto Sans JP / Hiragino Kaku Gothic ProN are used as fallbacks, but almost all headings, navigation, and labels are written in English. There are no colored CTA buttons; naviga