/* ─────────────────────────────────────────────────────────────
   Design tokens — validated data-viz palette (light + dark).
   All components and charts reference these roles, never raw hex.
   ───────────────────────────────────────────────────────────── */

:root {
  color-scheme: light;

  /* Surfaces & chrome */
  --page: #f9f9f7;
  --surface-1: #fcfcfb;
  --surface-2: #f3f2ee;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.1);

  /* Categorical series (fixed order — never cycled) */
  --series-1: #2a78d6; /* blue    */
  --series-2: #1baf7a; /* aqua    */
  --series-3: #eda100; /* yellow  */
  --series-4: #008300; /* green   */
  --series-5: #4a3aa7; /* violet  */
  --series-6: #e34948; /* red     */
  --series-7: #e87ba4; /* magenta */
  --series-8: #eb6834; /* orange  */

  /* Sequential ramp (blue, light→dark) */
  --seq-100: #cde2fb;
  --seq-200: #9ec5f4;
  --seq-250: #86b6ef;
  --seq-300: #6da7ec;
  --seq-400: #3987e5;
  --seq-450: #2a78d6;
  --seq-500: #256abf;
  --seq-600: #184f95;
  --seq-700: #0d366b;

  /* Diverging pair: blue ↔ red, neutral gray midpoint */
  --div-neg: #e34948;
  --div-neg-soft: #f5b5b4;
  --div-mid: #f0efec;
  --div-pos-soft: #9ec5f4;
  --div-pos: #2a78d6;

  /* Status (reserved — never used as series colors) */
  --status-good: #0ca30c;
  --status-warning: #fab219;
  --status-serious: #ec835a;
  --status-critical: #d03b3b;

  /* Delta text (accessible on this surface) */
  --delta-up: #006300;
  --delta-down: #c62f2f;

  --shadow-card: 0 1px 2px rgba(11, 11, 11, 0.04), 0 2px 8px rgba(11, 11, 11, 0.04);
  --font-sans: system-ui, -apple-system, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;

    --page: #0d0d0d;
    --surface-1: #1a1a19;
    --surface-2: #232322;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.1);

    --series-1: #3987e5;
    --series-2: #199e70;
    --series-3: #c98500;
    --series-4: #008300;
    --series-5: #9085e9;
    --series-6: #e66767;
    --series-7: #d55181;
    --series-8: #d95926;

    --div-neg: #e66767;
    --div-neg-soft: #7a3030;
    --div-mid: #383835;
    --div-pos-soft: #1c5cab;
    --div-pos: #3987e5;

    --delta-up: #0ca30c;
    --delta-down: #e66767;

    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.3);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;

  --page: #0d0d0d;
  --surface-1: #1a1a19;
  --surface-2: #232322;
  --text-primary: #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted: #898781;
  --grid: #2c2c2a;
  --baseline: #383835;
  --border: rgba(255, 255, 255, 0.1);

  --series-1: #3987e5;
  --series-2: #199e70;
  --series-3: #c98500;
  --series-4: #008300;
  --series-5: #9085e9;
  --series-6: #e66767;
  --series-7: #d55181;
  --series-8: #d95926;

  --div-neg: #e66767;
  --div-neg-soft: #7a3030;
  --div-mid: #383835;
  --div-pos-soft: #1c5cab;
  --div-pos: #3987e5;

  --delta-up: #0ca30c;
  --delta-down: #e66767;

  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.3);
}