NEWT (Newt / Reiwa Travel) Style Design System (DESIGN.md, Japanese UI)

Design policy: A bright, friendly consumer-facing (C2C/app) design starring vivid green #00cd68. It uses white backgrounds with rounded shapes (pill buttons with 24px radius, rounded cards) and abundant photography to embody fun and smartness. It is operated with an organized full design token system (5-step scales for green/red/yellow/blue/gray) - About NEWT: A travel booking app. Travel services tend to be information-dense, but this design avoids confusion through generous whitespace, large photos, and clear green CTAs. Search boxes, tabs, and cards are the core of the UI - Density: Medium