/* Design Tokens - Modern Design System Variables */

:root {
  /* Color Palette - Material Design 3 inspired */
  --color-primary-50: #f0f4ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;

  /* Neutral Colors - Apple HIG inspired */
  --color-neutral-0: #ffffff;
  --color-neutral-50: #f9fafb;
  --color-neutral-100: #f3f4f6;
  --color-neutral-200: #e5e7eb;
  --color-neutral-300: #d1d5db;
  --color-neutral-400: #9ca3af;
  --color-neutral-500: #6b7280;
  --color-neutral-600: #4b5563;
  --color-neutral-700: #374151;
  --color-neutral-800: #1f2937;
  --color-neutral-900: #111827;

  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: var(--color-primary-500);

  /* Background Colors */
  --color-background-primary: var(--color-neutral-0);
  --color-background-secondary: var(--color-neutral-50);
  --color-background-tertiary: var(--color-neutral-100);
  --color-background-dark: var(--color-neutral-900);
  --color-background-glass: rgba(255, 255, 255, 0.1);
  --color-background-glass-dark: rgba(0, 0, 0, 0.1);

  /* Text Colors */
  --color-text-primary: var(--color-neutral-900);
  --color-text-secondary: var(--color-neutral-600);
  --color-text-tertiary: var(--color-neutral-400);
  --color-text-inverse: var(--color-neutral-0);

  /* Border Colors */
  --color-border-light: var(--color-neutral-200);
  --color-border-medium: var(--color-neutral-300);
  --color-border-dark: var(--color-neutral-400);

  /* Typography Scale - Golden Ratio based */
  --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-size-6xl: 3.75rem;   /* 60px */
  --font-size-7xl: 4.5rem;    /* 72px */

  /* Font Families */
  --font-family-display: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-family-text: 'SF Pro Text', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;

  /* Font Weights */
  --font-weight-thin: 100;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-heavy: 800;
  --font-weight-black: 900;

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;

  /* Spacing Scale - 8px base unit */
  --spacing-1: 0.25rem;   /* 4px */
  --spacing-2: 0.5rem;    /* 8px */
  --spacing-3: 0.75rem;   /* 12px */
  --spacing-4: 1rem;      /* 16px */
  --spacing-5: 1.25rem;   /* 20px */
  --spacing-6: 1.5rem;    /* 24px */
  --spacing-8: 2rem;      /* 32px */
  --spacing-10: 2.5rem;   /* 40px */
  --spacing-12: 3rem;     /* 48px */
  --spacing-16: 4rem;     /* 64px */
  --spacing-20: 5rem;     /* 80px */
  --spacing-24: 6rem;     /* 96px */
  --spacing-32: 8rem;     /* 128px */

  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.125rem;   /* 2px */
  --radius-base: 0.25rem;  /* 4px */
  --radius-md: 0.375rem;   /* 6px */
  --radius-lg: 0.5rem;     /* 8px */
  --radius-xl: 0.75rem;    /* 12px */
  --radius-2xl: 1rem;      /* 16px */
  --radius-3xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;

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

  /* Glassmorphism Effects */
  --backdrop-blur-xs: blur(2px);
  --backdrop-blur-sm: blur(4px);
  --backdrop-blur-base: blur(8px);
  --backdrop-blur-md: blur(12px);
  --backdrop-blur-lg: blur(16px);
  --backdrop-blur-xl: blur(24px);

  /* Z-Index Scale */
  --z-index-dropdown: 1000;
  --z-index-sticky: 1020;
  --z-index-fixed: 1030;
  --z-index-modal-backdrop: 1040;
  --z-index-modal: 1050;
  --z-index-popover: 1060;
  --z-index-tooltip: 1070;

  /* Animation Properties */
  --animation-duration-fast: 150ms;
  --animation-duration-normal: 300ms;
  --animation-duration-slow: 500ms;
  --animation-timing-ease: cubic-bezier(0.4, 0, 0.2, 1);
  --animation-timing-ease-in: cubic-bezier(0.4, 0, 1, 1);
  --animation-timing-ease-out: cubic-bezier(0, 0, 0.2, 1);
  --animation-timing-ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;

  /* Container Sizes */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1400px;
}

/* Dark Theme Variables */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background-primary: var(--color-neutral-900);
    --color-background-secondary: var(--color-neutral-800);
    --color-background-tertiary: var(--color-neutral-700);
    --color-background-glass: rgba(0, 0, 0, 0.2);
    --color-background-glass-dark: rgba(255, 255, 255, 0.05);

    --color-text-primary: var(--color-neutral-100);
    --color-text-secondary: var(--color-neutral-300);
    --color-text-tertiary: var(--color-neutral-400);
    --color-text-inverse: var(--color-neutral-900);

    --color-border-light: var(--color-neutral-700);
    --color-border-medium: var(--color-neutral-600);
    --color-border-dark: var(--color-neutral-500);
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  :root {
    --animation-duration-fast: 0ms;
    --animation-duration-normal: 0ms;
    --animation-duration-slow: 0ms;
  }
}