/* Volcanic Capital — Colour System · DESIGN.md v1.2.3 · Strictly Confidential
   Two layers: system primitives (identical everywhere) + operational accents
   (allocated by entity; parent uses none). Accents are THREADS, never fills —
   max 4% of any page surface. */

:root {
  /* ---- §2.1 System primitives ------------------------------------ */
  --vc-ink:            #0F0C0A; /* Volcanic Black — warm undertone, NOT #0F0F0F */
  --vc-silver:         #C6C0B4; /* Silver / Platinum — WARM metallic, reversed marks on dark */
  --vc-text-secondary: #6B6B68; /* Stone Grey — secondary text, captions */
  --vc-rule:           #CCCCCC; /* Light Rule — hairlines, table borders */
  --vc-rule-soft:      #E5E0D6; /* Soft Rule — warm rules on paper */
  --vc-paper:          #FFFFFF; /* Paper — default surface */
  --vc-paper-warm:     #FAF6EE; /* Warm Paper — editorial/cover, sparingly */
  --vc-shading-soft:   #F0EBE0; /* Soft Shading — doc-control label shading */

  /* ---- §2.2 Operational accents (threads ≤4%) -------------------- */
  --vc-accent-gold:  #B89020; /* Volcanic Minerals — Locked */
  --vc-accent-blue:  #5B8FB8; /* Volcanic Energy — Locked, DEFAULT / lead */
  --vc-accent-sage:  #6B8E5C; /* Volcanic Energy — Locked, supplementary thread */
  --vc-accent-magma: #8B3122; /* Volcanic Resources + group seal — iron-oxide red */
  --vc-accent-verdigris: #3F5E58; /* Volcanic Properties — Locked 30 Jul 2026, oxidised copper */

  /* ---- §2.5 Dark-earth extended palette (supplementary) ---------- */
  --vc-earth-basalt: #241E1B; /* warm near-black ground / dark panel */
  --vc-earth-magma:  #8B3122; /* iron-oxide red — accent / emphasis */
  --vc-earth-umber:  #5A4632; /* dark earth brown — rules on dark */
  --vc-earth-ash:    #6E665C; /* warm stone grey — secondary on dark */
}

/* ---- Derived tints / shades (±10 / ±20% lightness) ---------------
   For chart series + hover states only; documented when used (§2.2). */
:root {
  --vc-gold-d10:  #93730F; --vc-gold-d20: #6E5609;
  --vc-gold-t10:  #CBA63A; --vc-gold-t20: #DBBC68;
  --vc-blue-d10:  #46789F; --vc-blue-d20: #375E7D;
  --vc-blue-t10:  #7BA6C7; --vc-blue-t20: #9DBDD6;
  --vc-sage-d10:  #557447; --vc-sage-d20: #425A37;
  --vc-sage-t10:  #84A576; --vc-sage-t20: #A2BC97;
  --vc-magma-d10: #6E271B; --vc-magma-d20: #511D14;
  --vc-magma-t10: #A8493A; --vc-magma-t20: #BE6A5C;
  --vc-verd-d10:  #2B3F3B; --vc-verd-d20: #16211F;
  --vc-verd-t10:  #537D75; --vc-verd-t20: #699A91;
  --vc-verd-t25:  #7FA39A; /* NOT a standard step — see note */
}

/* ---- Verdigris: the two allocated tones ---------------------------
   Volcanic Properties runs #3F5E58 on paper and --vc-verd-t25 #7FA39A on
   dark grounds. t25 is +25% L, not the usual +20, because the verdigris
   base is darker than the other four accents; the true t20 (#699A91) does
   not carry enough weight against basalt in the lockup qualifier. The pair
   is explicit, as gold's is (base on dark, d10 on paper) — do not substitute
   a derived step for either.
   Contrast: base 6.6:1 on #FAF6EE · t25 5.2:1 on #241E1B, 6.2:1 on #0F0C0A.
   Hue 168° — 39° clear of Energy blue, 66° clear of sage. */