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

Design policy: A warm, craft-oriented marketplace. The creators' works take center stage, while text and UI recede modestly. Its distinctive feature is an unusual typography that mixes Gothic typefaces (body/UI) with Mincho typefaces (headings) - Density: A high-density product grid. A Mincho-typeface category navigation in the sidebar, with product cards lined up in the main area. A very small base font of 11px creates a delicate, refined impression - Keywords: warm, craft feel, delicate, mixed typefaces, pastel, product-first - Characteristics: The mixing of Gothic and Mincho typefaces produ