/**
 * Royal Nepal Voyage - Design Tokens
 * Version: 1.0.0
 * 
 * A comprehensive design system using CSS Custom Properties
 * for consistent, maintainable styling across the site.
 */

:root {
  /* ========================================
     COLOR PALETTE
     ======================================== */

  /* Primary - Deep Navy Blue */
  --color-primary: #2c3e50;
  --color-primary-light: #34495e;
  --color-primary-dark: #1a252f;
  --color-primary-rgb: 44, 62, 80;

  /* Accent - Warm Amber */
  --color-accent: #e67e22;
  --color-accent-light: #f39c12;
  --color-accent-dark: #bf4400;
  /* Darker for WCAG AA contrast with white */
  --color-accent-rgb: 230, 126, 34;

  /* Secondary - Sage for nature context */
  --color-secondary: #27ae60;
  --color-secondary-light: #2ecc71;
  --color-secondary-dark: #1e8449;

  /* Neutral Backgrounds */
  --color-bg: #f5f7fa;
  --color-bg-alt: #ecf0f1;
  --color-surface: #ffffff;
  --color-surface-elevated: #ffffff;

  /* Text Colors - WCAG AA Compliant */
  --color-text-primary: #2c3e50;
  --color-text-secondary: #4a4a4a;
  /* Improved contrast: was #555555 */
  --color-text-muted: #5a6a6b;
  /* Improved contrast: was #7f8c8d */
  --color-text-inverse: #ffffff;

  /* Semantic Colors */
  --color-success: #27ae60;
  --color-warning: #f39c12;
  --color-error: #c0392b;
  --color-info: #2980b9;

  /* ========================================
     TYPOGRAPHY
     ======================================== */

  /* Font Families */
  --font-family: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-family-mono: 'Geist Mono', ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, monospace;

  /* Modular Type Scale */
  --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: 2rem;
  /* 32px */
  --font-size-4xl: 3rem;
  /* 48px */
  --font-size-5xl: 4rem;
  /* 64px */

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

  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;

  /* Letter Spacing */
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;
  --letter-spacing-wider: 0.05em;
  --letter-spacing-widest: 0.1em;

  /* ========================================
     SPACING SYSTEM (base 4px/8px)
     ======================================== */
  --space-1: 0.25rem;
  /* 4px */
  --space-2: 0.5rem;
  /* 8px */
  --space-3: 0.75rem;
  /* 12px */
  --space-4: 1rem;
  /* 16px */
  --space-5: 1.25rem;
  /* 20px */
  --space-6: 1.5rem;
  /* 24px */
  --space-8: 2rem;
  /* 32px */
  --space-10: 2.5rem;
  /* 40px */
  --space-12: 3rem;
  /* 48px */
  --space-16: 4rem;
  /* 64px */
  --space-20: 5rem;
  /* 80px */
  --space-24: 6rem;
  /* 96px */
  --space-32: 8rem;
  /* 128px */

  /* Section Padding */
  --section-padding-y: clamp(3rem, 5vw, 6rem);
  --section-padding-x: clamp(1rem, 5vw, 2rem);

  /* Container */
  --container-max: 1280px;
  --container-narrow: 768px;
  --container-wide: 1440px;

  /* ========================================
     BORDERS & RADIUS
     ======================================== */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  --border-width: 1px;
  --border-color: rgba(0, 0, 0, 0.1);
  --border-color-strong: rgba(0, 0, 0, 0.2);

  /* ========================================
     SHADOWS & EFFECTS
     ======================================== */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --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);

  /* Colored Shadows */
  --shadow-primary: 0 10px 15px -3px rgba(44, 62, 80, 0.3);
  --shadow-accent: 0 10px 15px -3px rgba(230, 126, 34, 0.4);

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-blur: blur(12px);
  --glass-border: 1px solid rgba(255, 255, 255, 0.5);

  /* ========================================
     TRANSITIONS & Z-INDEX
     ======================================== */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  --transition-colors: color var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
  --transition-transform: transform var(--duration-normal) var(--ease-out);
  --transition-all: all var(--duration-normal) var(--ease-out);

  --z-behind: -1;
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-fab: 800;
  --z-max: 9999;

  /* ========================================
     BREAKPOINTS
     ======================================== */
  --bp-sm: 640px;
  --bp-md: 768px;
  --bp-lg: 1024px;
  --bp-xl: 1280px;
}

/* ========================================
   REDUCED MOTION PREFERENCES
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-fast: 0ms;
    --duration-normal: 0ms;
    --duration-slow: 0ms;
    --duration-slower: 0ms;
  }
}

/* ========================================
   DARK MODE (Future Enhancement)
   ======================================== */

/* @media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0F1419;
    --color-bg-alt: #1A2129;
    --color-surface: #1E2730;
    --color-text-primary: #F5F5F5;
    --color-text-secondary: #B0B0B0;
  }
} */