:root{
  /* Brand palette — from Nevada Forum Brand Guidelines © 2026. Do not introduce colors outside this set. */
  --nv-parchment:#F2F0ED;
  --nv-deep-purple:#8659B5;
  --nv-silver-state:#D9D9D9;
  --nv-nevada-gold:#FFBF3F;
  --nv-sage-green:#4A8C6F;
  --nv-night-sky:#1A1A1F;
  --nv-white:#FFFFFF;

  /* Derived tints/shades (oklch color-mix) — for states only, never as new brand colors */
  --nv-deep-purple-hover:color-mix(in oklch, var(--nv-deep-purple) 85%, black 15%);
  --nv-deep-purple-active:color-mix(in oklch, var(--nv-deep-purple) 72%, black 28%);
  --nv-deep-purple-tint:color-mix(in oklch, var(--nv-deep-purple) 12%, white 88%);
  --nv-sage-green-hover:color-mix(in oklch, var(--nv-sage-green) 85%, black 15%);
  --nv-sage-green-tint:color-mix(in oklch, var(--nv-sage-green) 14%, white 86%);
  --nv-gold-hover:color-mix(in oklch, var(--nv-nevada-gold) 88%, black 12%);
  --nv-gold-tint:color-mix(in oklch, var(--nv-nevada-gold) 18%, white 82%);
  --nv-night-sky-tint:color-mix(in oklch, var(--nv-night-sky) 6%, white 94%);
  --nv-text-muted:color-mix(in oklch, var(--nv-night-sky) 55%, white 45%);
  --nv-border-strong:color-mix(in oklch, var(--nv-night-sky) 25%, white 75%);

  /* Semantic aliases */
  --bg-page:var(--nv-parchment);
  --bg-surface:var(--nv-white);
  --bg-inverse:var(--nv-night-sky);
  --bg-subtle:var(--nv-silver-state);

  --text-primary:var(--nv-night-sky);
  --text-muted:var(--nv-text-muted);
  --text-inverse:var(--nv-parchment);
  --text-on-accent:var(--nv-night-sky);

  --brand-primary:var(--nv-deep-purple);
  --brand-primary-hover:var(--nv-deep-purple-hover);
  --brand-primary-active:var(--nv-deep-purple-active);
  --brand-accent:var(--nv-nevada-gold);
  --brand-accent-hover:var(--nv-gold-hover);
  --brand-support:var(--nv-sage-green);
  --brand-support-hover:var(--nv-sage-green-hover);

  --border-default:var(--nv-silver-state);
  --border-strong:var(--nv-border-strong);

  --focus-ring:var(--nv-deep-purple);
}