Kama-asa Style Design System (DESIGN.md, Japanese UI)

Design policy: Achieve both the calm of a long-established tool shop and the usability of a modern EC site. Photo-centric, conveying the texture of culinary tools - Density: Medium density. An editorial-style EC that neatly arranges category cards and content (reading material) - Keywords: Honest / Warm / Handcraft / Calm / Refined - Shape language: Actively uses rounded corners. Buttons and cards use border-radius 8–16px, tags and toggles use 15–30px rounding or pill shapes - Typeface character: Headings are set in Noto Sans JP with wide letter-spacing (up to 0.2em) for an organic composition