:root{
  /* CHART ROOM — aviation-chart / banknote print: Prussian-slate ink,
     bone paper carries the identity, vermilion is a seal not a light */
  --ink:#0F161C; --panel:#141D26; --panel-soft:#1A2530; --raised:#213040;
  --line:#263644; --line-bright:#3C566C;
  --paper:#E8E1CF; --muted:#8799A6;
  --accent:#E8E1CF; --accent-dim:#CFC7B2; --ink-on-accent:#10171D;
  --mark:#E2513A;
  --red:#FF5E49; --orange:#F09A4A; --gold:#D8C26E; --green:#7CC492;
  --blue:#6FA8DC; --purple:#B9A0E8;
  --sans:"Archivo",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
  /* motion tokens — charter craft discipline 4; js/motion.js mirrors these */
  --dur-tap:150ms; --dur-enter:600ms; --dur-draw:1100ms;
  --ease:cubic-bezier(.16,1,.3,1);
  --ease-inout:cubic-bezier(.65,0,.35,1);
}