/* Stratus — design tokens (Tastefolio). Persian-first enterprise platform: white, cool grays, deep teal.
   Change --brand (a deep, desaturated hue) and the dark band follows it. */
:root {
  --canvas: #ffffff;
  --surface: #ffffff;
  --surface-2: #f5f7f8;     /* app background, UI mock backdrops */
  --surface-3: #eceff1;     /* hover, tracks */
  --overlay: rgba(10, 27, 30, .45);

  --ink: #10181b;
  --ink-2: #4e5b61;
  --ink-3: #85939a;
  --ink-inverse: #ffffff;

  --line: #e3e8eb;
  --line-2: #cfd7dc;

  --brand: #0f6b66;
  --brand-ink: #ffffff;
  --brand-soft: color-mix(in oklab, var(--brand) 9%, #fff);
  --brand-strong: color-mix(in oklab, var(--brand) 78%, #000);
  --brand-deep: color-mix(in oklab, var(--brand) 42%, #04191a);   /* dark band, icon rail */
  --brand-tint: color-mix(in oklab, var(--brand) 55%, #fff);       /* secondary headline line */
  --focus: color-mix(in oklab, var(--brand) 40%, transparent);

  --success: #17895a;
  --success-soft: #e5f4ec;
  --warning: #b8740a;
  --warning-soft: #fbf1df;
  --danger: #c4373c;
  --danger-soft: #fbe8e9;
  --info: #2a6fb5;
  --info-soft: #e6f0fa;

  --chart-1: var(--brand);
  --chart-2: #8bb8b4;
  --chart-3: #2a6fb5;
  --chart-4: #b8740a;
  --chart-5: #c4373c;
  --chart-6: #85939a;
  --chart-grid: #edf1f3;
  --chart-axis: var(--ink-3);
  --chart-curve: smooth;
  --chart-stroke: 2.25;
  --chart-area: .14;
  --chart-radius: 4;
  --chart-bar-gap: .4;
  --chart-donut: 16;

  /* Type: IBM Plex — rational, multilingual; Persian is primary */
  --font-sans: "IBM Plex Sans", "Vazirmatn", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: var(--font-sans);
  --font-mono: "IBM Plex Mono", "Vazirmatn", ui-monospace, Menlo, monospace;
  --fs-xs: 12px;
  --fs-sm: 13px;
  --fs-md: 14px;
  --fs-lg: 16px;
  --fs-xl: 20px;
  --fs-2xl: 26px;
  --fs-3xl: 36px;
  --fs-display: clamp(32px, 4.4vw, 54px);
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-bold: 600;
  --fw-display: 700;
  --lh-tight: 1.25;
  --lh-snug: 1.45;
  --lh-body: 1.7;
  --tracking-display: -.015em;
  --tracking-caps: .04em;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 48px;
  --space-9: 64px;
  --space-10: 96px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 999px;
  --border-w: 1px;
  --shadow-1: 0 1px 2px rgba(16, 24, 27, .06);
  --shadow-2: 0 8px 24px -8px rgba(16, 24, 27, .16), 0 0 0 1px rgba(16, 24, 27, .04);
  --shadow-3: 0 24px 48px -16px rgba(16, 24, 27, .28);

  --container: 1240px;
  --gutter: clamp(16px, 3.5vw, 32px);
  --header-h: 64px;
  --rail-w: 64px;
  --subnav-w: 232px;
  --control-h: 38px;
  --control-h-lg: 46px;

  --ease: cubic-bezier(.2, .7, .3, 1);
  --dur-1: 120ms;
  --dur-2: 200ms;
  --dur-3: 300ms;
  color-scheme: light;
}

[data-theme="dark"] {
  --canvas: #0d1416;
  --surface: #131c1f;
  --surface-2: #0f171a;
  --surface-3: #1b2629;
  --ink: #e9eff1;
  --ink-2: #a3b1b6;
  --ink-3: #6f7f85;
  --line: #22302f;
  --line-2: #2f3f40;
  --brand: #2aa198;
  --brand-ink: #04191a;
  --brand-soft: color-mix(in oklab, var(--brand) 16%, var(--surface));
  --brand-strong: color-mix(in oklab, var(--brand) 75%, #fff);
  --brand-deep: #06201f;
  --brand-tint: color-mix(in oklab, var(--brand) 80%, #fff);
  --success-soft: #11291e;
  --warning-soft: #2c2311;
  --danger-soft: #311a1b;
  --info-soft: #132233;
  --chart-grid: #1c2729;
  --shadow-2: 0 10px 28px -8px rgba(0, 0, 0, .6);
  color-scheme: dark;
}

/* Persian is the primary voice of this style. */
:root:lang(fa) {
  --font-sans: "Vazirmatn", "IBM Plex Sans", Tahoma, sans-serif;
  --lh-tight: 1.5;
  --lh-snug: 1.65;
  --lh-body: 1.95;
  --tracking-display: 0;
  --tracking-caps: 0;
  --fs-md: 14.5px;
}