/* ============================================================ Utility Engine — shared "sky" design system (sky.css) ------------------------------------------------------------ Ported from the launch-window seed. The palette follows the visitor's local hour (night / dawn / day / dusk) via [data-theme] and can be cycled with the sky button. Everything is token-driven, so each phase is just a token set. This file owns the ATMOSPHERE (tokens, the sky gradient, star/grid texture, twinkle, moon, shooting stars, the theme toggle and its sweep/toast). UI components live in components.css. Every utility-engine site ships this file at /_ue/sky.css. Per-site brand accent is injected via --brand on :root (see the inline token block the scaffold emits); when set it overrides the per-phase --accent so the vertical keeps its hue. SCALES. Besides colour, :root carries the three scales every component is built from — type (--step-*), space (--space-*) and elevation (--shadow-1/2/3). Consume the tokens; do not reintroduce ad-hoc px/rem. The shadow ramp is composed once here from per-phase INPUTS (--shadow-rgb / --shadow-a*), which is deliberate: the ramp itself is only ever declared at :root (0,1,0) so a site stylesheet loaded later can still redefine --shadow-1/2/3 wholesale without fighting phase specificity. ============================================================ */ :root { /* ignition accent — reserved for urgency / primary CTAs in EVERY phase */ --ignite: #ff6a2b; --ignite-bg: rgba(255, 106, 43, 0.16); /* status (dark-phase defaults; the day phase overrides for contrast) */ --success: #34d399; --success-bg: rgba(52, 211, 153, 0.16); --warn: #fbbf24; --warn-bg: rgba(251, 191, 36, 0.16); --danger: #f87171; --danger-bg: rgba(248, 113, 113, 0.16); /* ---------- shape ---------- */ --radius: 16px; --radius-sm: 10px; --radius-lg: 22px; --radius-pill: 999px; --maxw: 760px; /* per-site override: createSite({ maxWidth }) → inline on */ /* ---------- typefaces ---------- Default is a zero-network system stack. createSite({ fonts }) emits a