/* Iron Arachne — colour tokens
 *
 * Single source of truth. The site (ironarachne/src/lib/styles/tokens.css)
 * should import or mirror this file rather than redeclaring the values;
 * the two drifted apart once already.
 *
 * Contrast ratios are measured against #ffffff and --ia-charcoal.
 * ✓ = passes WCAG AA for body text (4.5:1)
 * ~ = large text only (3:1)
 * ✗ = decorative use only, never text
 */

:root {
  /* ---- Brand core ------------------------------------------------------
   * The green is a dark-background colour. On white it measures 1.57:1,
   * which is why every lockup carries a charcoal keyline — the outline
   * supplies the contrast the fill cannot. Never set green text on white.
   */
  --ia-green: #76e841;          /* on white 1.57 ✗ | on charcoal 10.65 ✓ */
  --ia-green-acid: #9eff5b;     /* on white 1.24 ✗ | on charcoal 13.44 ✓ */

  /* ---- Neutrals --------------------------------------------------------
   * Charcoal is the brand's black. Pure #000 is never used: it flattens
   * the keyline against the green and reads harsh on screens.
   */
  --ia-charcoal: #1b1e24;       /* on white 16.70 ✓ */
  --ia-slate: #2a2f38;          /* on white 13.44 ✓ */
  --ia-granite: #3c4350;        /* on white  9.95 ✓ */

  /* ---- Accents ---------------------------------------------------------
   * Generator-domain colours. Used to distinguish tool families in the
   * product; not part of the logo palette and never used inside the mark.
   */
  --ia-gold: #c8a46e;           /* fantasy, heraldry   */
  --ia-tan: #5c5031;            /* maps, parchment     */
  --ia-emerald: #2f6b4f;        /* nature, wilderness  */
  --ia-crimson: #8b3a3a;        /* combat, danger      */
  --ia-amethyst: #6c2dbd;       /* magic, arcane       */
  --ia-cyan: #39d0ff;           /* sci-fi, tech        */
  --ia-plasma-blue: #4286f4;    /* starships, systems  */
  --ia-magenta: #ff4fd6;        /* anomalies, exotica  */

  /* ---- Semantic --------------------------------------------------------
   * Map roles to palette entries. Change the mapping, not the hex.
   */
  --ia-ink: var(--ia-charcoal);
  --ia-surface: #ffffff;
  --ia-surface-dark: var(--ia-charcoal);
  --ia-accent: var(--ia-green);

  --ia-status-success: var(--ia-emerald);
  --ia-status-error: var(--ia-crimson);
  --ia-status-message: var(--ia-gold);
}

/* Dark surfaces are where the brand green belongs. */
@media (prefers-color-scheme: dark) {
  :root {
    --ia-surface: var(--ia-charcoal);
    --ia-ink: #ffffff;
  }
}