/* Build CTO color tokens.
   Warm carbon neutrals + Signal Lime accent. Standard Green (#033431) is CTOHA's brand color,
   reserved for certification/standards elements only — the USB-logo-on-a-laptop rule. */
:root{
  /* carbon scale (warm near-black → paper) */
  --bc-carbon-950:#161613;
  --bc-carbon-900:#1F1F1B;
  --bc-carbon-800:#2B2B26;
  --bc-carbon-700:#3F3F39;
  --bc-carbon-500:#6B6B61;
  --bc-carbon-400:#93938A;
  --bc-carbon-300:#C6C6BC;
  --bc-carbon-200:#DEDED6;
  --bc-carbon-100:#EBEBE4;
  --bc-paper:#F5F5F0;
  --bc-white:#FFFFFF;

  /* Signal Lime — the accent. One lime element per view region. */
  --bc-lime:#C8F135;
  --bc-lime-up:#D4F94E;    /* hover */
  --bc-lime-down:#AFD91F;  /* press */
  --bc-lime-tint:#F1FAD3;  /* wash / selected row */
  --bc-lime-edge:#9DC410;  /* underlines, thin rules where full lime is too loud */

  /* Standard Green — CTOHA verbatim. Certification elements ONLY. */
  --bc-standard-green:#033431;
  --bc-standard-paper:#FFFFFB;

  /* semantic status (stock states) */
  --bc-success:#1B7A3D;  --bc-success-tint:#E0F1E3;
  --bc-warning:#9E6A00;  --bc-warning-tint:#FBF0D2;
  --bc-danger:#BE3421;   --bc-danger-tint:#FAE3DE;

  /* aliases */
  --surface-page:var(--bc-paper);
  --surface-card:var(--bc-white);
  --surface-sunken:var(--bc-carbon-100);
  --surface-ink:var(--bc-carbon-950);
  --surface-ink-raised:var(--bc-carbon-900);
  --surface-accent:var(--bc-lime);
  --surface-standard:var(--bc-standard-green);
  --text-heading:var(--bc-carbon-950);
  --text-body:var(--bc-carbon-800);
  --text-muted:var(--bc-carbon-500);
  --text-on-ink:var(--bc-paper);
  --text-muted-on-ink:rgba(245,245,240,.62);
  --text-on-accent:var(--bc-carbon-950);
  --text-on-standard:var(--bc-standard-paper);
  --link:var(--bc-carbon-950);
  --link-hover:var(--bc-carbon-950);
  --border-hairline:var(--bc-carbon-200);
  --border-strong:var(--bc-carbon-950);
  --focus-ring:var(--bc-carbon-950);
  --focus-ring-on-ink:var(--bc-lime);
  --interactive:var(--bc-lime);
  --interactive-hover:var(--bc-lime-up);
  --interactive-press:var(--bc-lime-down);
  --stock-in:var(--bc-success);
  --stock-low:var(--bc-warning);
  --stock-out:var(--bc-danger);
  --scrim:rgba(22,22,19,.55);
}