/* ============================================================================ AutomationCost — shared design system (app.css) Ported from the WizardCost umbrella homepage scaffold (single-row nav, content rhythm, scroll reveal + v5 flourishes) but kept in the AutomationCost GREEN palette. Re-uses each page's :root tokens (--accent, --bg, --text…). GATING: chrome is scoped under `body.ac` so a page only opts in once its carries class "ac" (+ "anim" for scroll reveal) and the new .ac-nav markup. Pages without it are untouched — safe for a phased rollout. Link this LAST in (after the page's inline