/**
 * Familytree 3.0 - CSS Variables
 * Neutral, customizable design tokens
 * Theme-able via CSS custom properties
 */

:root {
  /* ============================================
     Color System - Neutral Base
     ============================================ */

  /* Primary - Customizable per tenant/theme */
  --color-primary: #3b82f6;        /* Blue 500 */
  --color-primary-light: #60a5fa;  /* Blue 400 */
  --color-primary-dark: #2563eb;   /* Blue 600 */

  /* Secondary */
  --color-secondary: #8b5cf6;      /* Violet 500 */
  --color-secondary-light: #a78bfa;
  --color-secondary-dark: #7c3aed;

  /* Neutral grays */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Semantic colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  /* ============================================
     Theme Colors - Light Mode (Default)
     ============================================ */

  --color-background: #ffffff;
  --color-surface: #f9fafb;
  --color-surface-elevated: #ffffff;

  --color-text-primary: #111827;
  --color-text-secondary: #6b7280;
  --color-text-tertiary: #9ca3af;
  --color-text-muted: #9ca3af;
  --color-text-inverse: #ffffff;

  /* Background aliases */
  --color-bg-secondary: #f9fafb;

  --color-border: #e5e7eb;
  --color-border-hover: #d1d5db;
  --color-border-focus: var(--color-primary);

  --color-interactive-hover: #f3f4f6;
  --color-interactive-active: #e5e7eb;

  /* ============================================
     Dark Mode
     ============================================ */

  --color-background-dark: #0a0e27;
  --color-surface-dark: #1a1f3a;
  --color-surface-elevated-dark: #252a45;

  --color-text-primary-dark: #f9fafb;
  --color-text-secondary-dark: #9ca3af;
  --color-text-tertiary-dark: #6b7280;
  --color-text-muted-dark: #6b7280;

  /* Background aliases */
  --color-bg-secondary-dark: #1a1f3a;

  --color-border-dark: #374151;
  --color-border-hover-dark: #4b5563;

  --color-interactive-hover-dark: #252a45;
  --color-interactive-active-dark: #374151;

  /* ============================================
     Spacing Scale
     ============================================ */

  --space-xs: 0.25rem;   /* 4px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 0.75rem;   /* 12px */
  --space-lg: 1rem;      /* 16px */
  --space-xl: 1.5rem;    /* 24px */
  --space-2xl: 2rem;     /* 32px */
  --space-3xl: 3rem;     /* 48px */
  --space-4xl: 4rem;     /* 64px */

  /* ============================================
     Typography
     ============================================ */

  /* Font families */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-heading: var(--font-family-base);
  --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;

  /* Font sizes */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */

  /* Font weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* ============================================
     Border Radius
     ============================================ */

  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-2xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;

  /* ============================================
     Shadows
     ============================================ */

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* ============================================
     Animation
     ============================================ */

  /* Durations */
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 800ms;

  /* Easing functions */
  --ease-linear: linear;
  --ease-smooth: cubic-bezier(0.4, 0.0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0.0, 1, 1);
  --ease-out: cubic-bezier(0.0, 0.0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0.0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* ============================================
     Z-Index Scale
     ============================================ */

  --z-base: 0;
  --z-dropdown: 1000;
  --z-sticky: 1100;
  --z-fixed: 1200;
  --z-mobile-nav: 1250;
  --z-modal-backdrop: 1300;
  --z-modal: 1400;
  --z-popover: 1500;
  --z-tooltip: 1600;
  --z-notification: 1700;

  /* ============================================
     Globe-specific
     ============================================ */

  --globe-size: 280px;
  --globe-size-tablet: 400px;
  --globe-size-desktop: 600px;

  /* ============================================
     Mobile Navigation
     ============================================ */

  --mobile-nav-height: 60px;

  /* ============================================
     Container Widths
     ============================================ */

  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;

  /* ============================================
     Breakpoints (for reference in JS)
     ============================================ */

  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* ============================================
   Dark Mode Toggle
   ============================================ */

[data-theme="dark"] {
  --color-background: var(--color-background-dark);
  --color-surface: var(--color-surface-dark);
  --color-surface-elevated: var(--color-surface-elevated-dark);

  --color-text-primary: var(--color-text-primary-dark);
  --color-text-secondary: var(--color-text-secondary-dark);
  --color-text-tertiary: var(--color-text-tertiary-dark);
  --color-text-muted: var(--color-text-muted-dark);

  --color-bg-secondary: var(--color-bg-secondary-dark);

  --color-border: var(--color-border-dark);
  --color-border-hover: var(--color-border-hover-dark);

  --color-interactive-hover: var(--color-interactive-hover-dark);
  --color-interactive-active: var(--color-interactive-active-dark);
}

/* System preference dark mode */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-background: var(--color-background-dark);
    --color-surface: var(--color-surface-dark);
    --color-surface-elevated: var(--color-surface-elevated-dark);

    --color-text-primary: var(--color-text-primary-dark);
    --color-text-secondary: var(--color-text-secondary-dark);
    --color-text-tertiary: var(--color-text-tertiary-dark);
    --color-text-muted: var(--color-text-muted-dark);

    --color-bg-secondary: var(--color-bg-secondary-dark);

    --color-border: var(--color-border-dark);
    --color-border-hover: var(--color-border-hover-dark);

    --color-interactive-hover: var(--color-interactive-hover-dark);
    --color-interactive-active: var(--color-interactive-active-dark);
  }
}

/* ============================================
   Responsive Typography
   ============================================ */

@media (min-width: 768px) {
  :root {
    --font-size-base: 1.0625rem; /* 17px */
    --globe-size: var(--globe-size-tablet);
  }
}

@media (min-width: 1024px) {
  :root {
    --font-size-base: 1.125rem; /* 18px */
    --globe-size: var(--globe-size-desktop);
  }
}