/* variables.css — Code Family Website
   Design tokens: colors, spacing, typography scale, shadows, and radii.
   Light mode is the default; dark mode overrides via prefers-color-scheme.
*/

:root {
  /* ─── Brand accent ─── */
  --color-accent: #0A84FF;
  --color-accent-hover: #0070E0;
  --color-accent-subtle: rgba(10, 132, 255, 0.10);

  /* ─── App-specific accent colors ─── */
  --color-wellkin: #0D9488;
  --color-wellkin-subtle: rgba(13, 148, 136, 0.12);
  --color-expiry: #D97706;
  --color-expiry-subtle: rgba(217, 119, 6, 0.12);
  --color-movr: #2563EB;
  --color-movr-subtle: rgba(37, 99, 235, 0.12);
  --color-luminary: #EA580C;
  --color-luminary-subtle: rgba(234, 88, 12, 0.12);
  --color-hub: #7C3AED;
  --color-hub-subtle: rgba(124, 58, 237, 0.12);
  --color-ledger: #059669;
  --color-ledger-subtle: rgba(5, 150, 105, 0.12);

  /* ─── Light mode surface & text ─── */
  --color-bg: #FBFBFD;
  --color-bg-elevated: #FFFFFF;
  --color-bg-secondary: #F2F2F7;
  --color-bg-tertiary: #E5E5EA;

  --color-text-primary: #1C1C1E;
  --color-text-secondary: #3A3A3C;
  --color-text-tertiary: #636366;
  --color-text-quaternary: #6E6E73;

  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-strong: rgba(0, 0, 0, 0.15);

  /* Nav frosted glass */
  --color-nav-bg: rgba(251, 251, 253, 0.80);

  /* ─── Shadows (light mode) ─── */
  --shadow-xs: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.07), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.12), 0 8px 20px rgba(0,0,0,0.06);

  /* ─── Border radii ─── */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-app-icon: 22px;   /* macOS app icon proportions */
  --radius-full: 9999px;

  /* ─── Spacing scale (4px base) ─── */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-32: 128px;

  /* ─── Typography ─── */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;

  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */
  --text-5xl: 3rem;      /* 48px */
  --text-6xl: 3.75rem;   /* 60px */
  --text-7xl: 4.5rem;    /* 72px */

  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.5;
  --leading-relaxed: 1.65;

  --tracking-tight: -0.04em;
  --tracking-snug: -0.025em;
  --tracking-normal: -0.01em;
  --tracking-wide: 0.05em;

  /* ─── Layout ─── */
  --max-width-content: 1160px;
  --max-width-prose: 680px;

  /* ─── Transitions ─── */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* ─── Z-index scale ─── */
  --z-sticky: 100;
  --z-dropdown: 200;
  --z-overlay: 300;
  --z-modal: 400;
}

/* ─── Dark mode: system preference (only when user hasn't manually picked light) ─── */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #0A0A0C;
    --color-bg-elevated: #1C1C1E;
    --color-bg-secondary: #2C2C2E;
    --color-bg-tertiary: #3A3A3C;
    --color-text-primary: #F5F5F7;
    --color-text-secondary: #D1D1D6;
    --color-text-tertiary: #98989F;
    --color-text-quaternary: #98989F;
    --color-border: rgba(255, 255, 255, 0.10);
    --color-border-strong: rgba(255, 255, 255, 0.18);
    --color-nav-bg: rgba(10, 10, 12, 0.80);
    --shadow-xs: 0 1px 3px rgba(0,0,0,0.30), 0 1px 2px rgba(0,0,0,0.20);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.35), 0 1px 3px rgba(0,0,0,0.20);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.40), 0 2px 6px rgba(0,0,0,0.25);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.45), 0 4px 12px rgba(0,0,0,0.30);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.50), 0 8px 20px rgba(0,0,0,0.35);
    --color-accent-subtle: rgba(10, 132, 255, 0.18);
  }
}

:root[data-theme="dark"] {
  --color-bg: #0A0A0C;
  --color-bg-elevated: #1C1C1E;
  --color-bg-secondary: #2C2C2E;
  --color-bg-tertiary: #3A3A3C;

  --color-text-primary: #F5F5F7;
  --color-text-secondary: #D1D1D6;
  --color-text-tertiary: #98989F;
  --color-text-quaternary: #98989F;

  --color-border: rgba(255, 255, 255, 0.10);
  --color-border-strong: rgba(255, 255, 255, 0.18);

  --color-nav-bg: rgba(10, 10, 12, 0.80);

  --shadow-xs: 0 1px 3px rgba(0,0,0,0.30), 0 1px 2px rgba(0,0,0,0.20);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.35), 0 1px 3px rgba(0,0,0,0.20);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.40), 0 2px 6px rgba(0,0,0,0.25);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.45), 0 4px 12px rgba(0,0,0,0.30);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.50), 0 8px 20px rgba(0,0,0,0.35);

  --color-accent-subtle: rgba(10, 132, 255, 0.18);
}

:root[data-theme="light"] {
  --color-bg: #FBFBFD;
  --color-bg-elevated: #FFFFFF;
  --color-bg-secondary: #F2F2F7;
  --color-bg-tertiary: #E5E5EA;

  --color-text-primary: #1C1C1E;
  --color-text-secondary: #3A3A3C;
  --color-text-tertiary: #636366;
  --color-text-quaternary: #6E6E73;

  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-strong: rgba(0, 0, 0, 0.15);

  --color-nav-bg: rgba(251, 251, 253, 0.80);

  --shadow-xs: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.07), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.12), 0 8px 20px rgba(0,0,0,0.06);

  --color-accent-subtle: rgba(10, 132, 255, 0.10);
}