:root {
  color-scheme: light dark;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;

  --color-page: #f8f9fa;
  --color-public-page: #f8f9fa;
  --color-surface: #ffffff;
  --color-surface-muted: #f9fafb;
  --color-surface-hover: #f3f4f6;
  --color-page-header-bg: var(--color-surface);
  --color-page-header-border: var(--color-border);
  --color-metric-card-bg: var(--color-surface);
  --color-metric-card-border: var(--color-border);
  --color-border: #e5e7eb;
  --color-border-strong: #d1d5db;
  --color-text: #1f2937;
  --color-heading: #111827;
  --color-muted: #6b7280;
  --color-subtle: #9ca3af;
  --color-primary: #4169e1;
  /* --color-primary-dark is a foreground/text-emphasis token (a:hover,
     hero eyebrow) — it inverts direction in dark mode (goes lighter, not
     darker) to stay legible. --color-brand-surface is the separate
     background-only token (header chrome) that stays a deep navy in both
     themes. Do not reuse one for the other's role. */
  --color-primary-dark: #003366;
  --color-primary-soft: #eef3ff;
  --color-on-primary: #ffffff;
  --color-brand-surface: #003366;
  /* Button/solid-surface hover shade — separate from --color-primary-dark
     because a hover background wants "further from --color-primary in
     whichever direction still contrasts with --color-on-primary text",
     which is darker in light mode but must NOT go light like
     --color-primary-dark does in dark mode. */
  --color-primary-hover: #003366;
  --color-accent: #ffdd57;
  --color-neutral: #d3d3d3;
  --color-success-bg: #dcfce7;
  --color-success-text: #166534;
  --color-warning-bg: #fef3c7;
  --color-warning-text: #92400e;
  --color-danger-bg: #fee2e2;
  --color-danger-text: #991b1b;
  --color-danger-hover-bg: #fecaca;
  --color-danger-hover-text: #7f1d1d;
  --color-info-bg: #dbeafe;
  --color-info-text: #1e40af;
  --color-neutral-bg: #f3f4f6;
  --color-neutral-text: #374151;
  --color-neutral-hover-bg: #e5e7eb;
  --color-row-border: #f3f4f6;
  --color-notice-success-bg: #f0fdf4;
  --color-notice-warning-bg: #fffbeb;
  --color-notice-danger-bg: #fef2f2;
  --color-notice-info-bg: #eff6ff;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-pill: 9999px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);

  --container-public: 72rem;
  --container-management: 88rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-page: #0f172a;
    --color-public-page: #0f172a;
    --color-surface: #1a2334;
    --color-surface-muted: #202b40;
    --color-surface-hover: #263145;
    --color-page-header-bg: #111827;
    --color-page-header-border: #2f3b52;
    --color-metric-card-bg: #111827;
    --color-metric-card-border: #2f3b52;
    --color-border: #2f3b52;
    --color-border-strong: #3d4b66;
    --color-text: #d7dee8;
    --color-heading: #f3f5f9;
    --color-muted: #98a3b6;
    --color-subtle: #6b7688;
    --color-primary: #6d8dff;
    --color-primary-dark: #aac0ff;
    --color-primary-soft: rgba(109, 141, 255, 0.16);
    --color-on-primary: #ffffff;
    --color-brand-surface: #0a2a5c;
    --color-primary-hover: #3a5bc7;
    --color-accent: #ffdd57;
    --color-neutral: #4b5568;
    --color-success-bg: #123524;
    --color-success-text: #7ee0a8;
    --color-warning-bg: #3a2a0d;
    --color-warning-text: #f2c661;
    --color-danger-bg: #3a1616;
    --color-danger-text: #f19c9c;
    --color-danger-hover-bg: #572020;
    --color-danger-hover-text: #ffd0d0;
    --color-info-bg: #16223f;
    --color-info-text: #8fb4f5;
    --color-neutral-bg: #263145;
    --color-neutral-text: #c2cad8;
    --color-neutral-hover-bg: #32405a;
    --color-row-border: #2f3b52;
    --color-notice-success-bg: #123524;
    --color-notice-warning-bg: #3a2a0d;
    --color-notice-danger-bg: #3a1616;
    --color-notice-info-bg: #16223f;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  }
}