/* ShowApp — shared design system (web). * * Mirrors the app's tokens (src/theme.ts) one-for-one so showapp.app and the * iOS/Android app read as the same product: Uber-inspired, monochrome, with * periwinkle kept as a functional accent only (links, active/selected, LIVE). * * Adaptive: light is the default, dark applies via prefers-color-scheme. * `data-theme="light|dark"` on forces one, for a future manual toggle. * * Include via web-head.php. Safe to add to a page before its own inline *