/**
 * 🎨 TrackMyIVF Design Tokens
 * Unified design system following Guardian Framework
 * Mobile-first, accessible, and emotionally supportive
 */

:root {
  /* =================================================================
     🎨 COLOR TOKENS
     ================================================================= */
  
  /* Purple/Brand Scale (Primary) */
  --color-purple-25: #fcfaff;
  --color-purple-50: #faf5ff;
  --color-purple-100: #f3e8ff;
  --color-purple-200: #e9d5ff;
  --color-purple-300: #d8b4fe;
  --color-purple-400: #c084fc;
  --color-purple-500: #a855f7;  /* PRIMARY - Guardian Framework */
  --color-purple-600: #9333ea;
  --color-purple-700: #7c3aed;
  --color-purple-800: #6b21a8;
  --color-purple-900: #581c87;
  
  /* Purple with Opacity */
  --color-purple-500-10: rgba(168, 85, 247, 0.1);
  --color-purple-500-20: rgba(168, 85, 247, 0.2);
  --color-purple-500-25: rgba(168, 85, 247, 0.25);
  --color-purple-500-30: rgba(168, 85, 247, 0.3);
  --color-purple-500-50: rgba(168, 85, 247, 0.5);
  --color-purple-500-80: rgba(168, 85, 247, 0.8);
  
  --color-purple-700-10: rgba(124, 58, 237, 0.1);
  --color-purple-700-15: rgba(124, 58, 237, 0.15);
  --color-purple-700-20: rgba(124, 58, 237, 0.2);
  --color-purple-700-30: rgba(124, 58, 237, 0.3);
  
  /* Gradients */
  --gradient-purple: linear-gradient(135deg, var(--color-purple-500) 0%, var(--color-purple-700) 100%);
  --gradient-purple-soft: linear-gradient(135deg, var(--color-purple-400) 0%, var(--color-purple-600) 100%);
  --gradient-purple-subtle: linear-gradient(135deg, var(--color-purple-100) 0%, var(--color-purple-200) 100%);
  
  /* Gray Scale */
  --color-gray-25: #fcfcfd;
  --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 - Warm & Supportive */
  --color-success-100: #d1fae5;
  --color-success-500: #10b981;
  --color-success-600: #059669;
  
  --color-warning-100: #fef3c7;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;
  
  --color-info-100: #dbeafe;
  --color-info-500: #3b82f6;
  --color-info-600: #2563eb;
  
  /* Special Purpose */
  --color-overlay: rgba(0, 0, 0, 0.3);
  --color-nav-bg: rgba(255, 255, 255, 0.98);
  --color-white: #ffffff;
  --color-black: #000000;
  
  /* =================================================================
     📏 SPACING TOKENS (8px grid system)
     ================================================================= */
  
  --space-0: 0;
  --space-0-5: 2px;
  --space-1: 4px;
  --space-1-5: 6px;
  --space-2: 8px;
  --space-2-5: 10px;
  --space-3: 12px;
  --space-3-5: 14px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 28px;
  --space-8: 32px;
  --space-9: 36px;
  --space-10: 40px;
  --space-11: 44px;  /* Min touch target - Guardian Framework */
  --space-12: 48px;
  --space-14: 56px;
  --space-15: 60px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-32: 128px;
  
  /* =================================================================
     📐 TYPOGRAPHY TOKENS
     ================================================================= */
  
  /* Font Family */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
  
  /* Font Sizes - Mobile First with Fluid Typography */
  --text-xs: clamp(0.75rem, 2vw, 0.75rem);      /* 12px */
  --text-sm: clamp(0.875rem, 2.5vw, 0.875rem);  /* 14px */
  --text-base: clamp(1rem, 3vw, 1rem);          /* 16px */
  --text-lg: clamp(1.125rem, 3.5vw, 1.125rem);  /* 18px */
  --text-xl: clamp(1.25rem, 4vw, 1.25rem);      /* 20px */
  --text-2xl: clamp(1.5rem, 5vw, 1.5rem);       /* 24px */
  --text-3xl: clamp(1.875rem, 6vw, 1.875rem);   /* 30px */
  --text-4xl: clamp(2.25rem, 7vw, 2.25rem);     /* 36px */
  --text-5xl: clamp(2.5rem, 8vw, 3rem);         /* 40px → 48px */
  --text-6xl: clamp(3rem, 9vw, 3.75rem);        /* 48px → 60px */
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 1.75;
  
  /* Letter Spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  
  /* =================================================================
     🎯 BORDER RADIUS TOKENS
     ================================================================= */
  
  --radius-none: 0;
  --radius-sm: 4px;
  --radius-md-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-3xl: 24px;
  --radius-full: 9999px;
  
  /* =================================================================
     🌫️ SHADOW TOKENS
     ================================================================= */
  
  --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
  
  /* Special Shadows */
  --shadow-mobile-menu: -4px 0 24px rgba(0, 0, 0, 0.1);
  --shadow-purple: 0 4px 12px var(--color-purple-500-25);
  --shadow-purple-lg: 0 8px 24px var(--color-purple-500-25);
  --shadow-dropdown: 0 4px 20px var(--color-purple-700-15);
  
  /* Focus Shadows */
  --shadow-focus-ring: 0 0 0 4px var(--color-purple-500-10);
  --shadow-focus-ring-lg: 0 0 0 6px var(--color-purple-500-15);
  
  /* =================================================================
     🔄 TRANSITION TOKENS
     ================================================================= */
  
  --transition-fast: 150ms;
  --transition-base: 200ms;
  --transition-slow: 300ms;
  --transition-slower: 400ms;
  
  /* Easing Functions */
  --ease-linear: linear;
  --ease-in: ease-in;
  --ease-out: ease-out;
  --ease-in-out: ease-in-out;
  --ease-out-cubic: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in-cubic: cubic-bezier(0.4, 0, 1, 1);
  --ease-elastic: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* =================================================================
     📱 BREAKPOINTS & CONTAINER TOKENS
     ================================================================= */
  
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
  
  /* Container Max Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
  
  /* =================================================================
     🎨 Z-INDEX SCALE
     ================================================================= */
  
  --z-0: 0;
  --z-10: 10;
  --z-20: 20;
  --z-30: 30;
  --z-40: 40;
  --z-50: 50;        /* Nav header */
  --z-100: 100;      /* Menu toggle */
  --z-overlay: 9998; /* Modal overlay */
  --z-modal: 9999;   /* Mobile menu, modals */
  
  /* =================================================================
     🎯 COMPONENT-SPECIFIC TOKENS
     ================================================================= */
  
  /* Buttons */
  --button-min-height: var(--space-11); /* 44px touch target */
  --button-padding-x: var(--space-6);
  --button-padding-y: var(--space-3);
  --button-font-size: var(--text-base);
  --button-font-weight: var(--font-semibold);
  --button-radius: var(--radius-lg);
  --button-transition: all var(--transition-base) var(--ease-out);
  
  /* Forms */
  --input-min-height: var(--space-12); /* 48px for mobile */
  --input-padding-x: var(--space-4);
  --input-padding-y: var(--space-3);
  --input-font-size: var(--text-base);
  --input-border-width: 2px;
  --input-radius: var(--radius-md);
  
  /* Navigation */
  --nav-height: var(--space-16); /* 64px */
  --nav-link-padding: var(--space-2-5) var(--space-4);
  --mobile-menu-width: 280px;
  
  /* Cards */
  --card-padding: var(--space-6);
  --card-radius: var(--radius-xl);
  --card-shadow: var(--shadow-sm);
  
  /* =================================================================
     🌟 ANIMATION TOKENS (Guardian Framework)
     ================================================================= */
  
  /* Breathing Animation (2-3s cycles) */
  --breathe-duration: 3s;
  --breathe-scale-min: 1;
  --breathe-scale-max: 1.05;
  --breathe-opacity-min: 0.8;
  --breathe-opacity-max: 1;
}

/* =================================================================
   📱 RESPONSIVE DESIGN TOKENS
   ================================================================= */

@media (min-width: 768px) {
  :root {
    /* Adjust fluid typography for larger screens */
    --text-5xl: 3rem;    /* 48px */
    --text-6xl: 3.75rem; /* 60px */
    
    /* Desktop-specific spacing */
    --container-padding: var(--space-8);
    
    /* Desktop navigation */
    --nav-height: var(--space-20); /* 80px */
  }
}

@media (min-width: 1024px) {
  :root {
    /* Fine-tune for desktop */
    --container-padding: var(--space-10);
  }
}

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

@media (prefers-color-scheme: dark) {
  /* Ready for dark mode when implemented */
  /* :root {} */
}

/* =================================================================
   ♿ ACCESSIBILITY TOKENS
   ================================================================= */

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0.01ms;
    --transition-base: 0.01ms;
    --transition-slow: 0.01ms;
    --transition-slower: 0.01ms;
    --breathe-duration: 0.01ms;
  }
}

@media (prefers-contrast: high) {
  :root {
    /* High contrast adjustments */
    --input-border-width: 3px;
  }
}