/**
 * URLement Design System - Design Tokens
 * 
 * This file contains all design tokens as CSS custom properties.
 * Import this file first, then use these tokens throughout your CSS.
 * 
 * Usage: var(--token-name)
 * Example: color: var(--color-text-primary);
 */

:root {
  /* ============================================
     COLOR TOKENS
     ============================================ */
  
  /* Primary Colors */
  --color-primary: #007bff;
  --color-primary-hover: #0056b3;
  --color-primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --color-background-gradient: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 50%, #f1f5f9 100%);
  
  /* Semantic Colors - Success/Positive */
  --color-success: #10B981;
  --color-success-hover: #059669;
  --color-success-light: #D1FAE5;
  --color-success-dark: #065F46;
  --color-success-darker: #047857;
  
  /* Semantic Colors - Warning/Attention */
  --color-warning: #F59E0B;
  --color-warning-alt: #EA580C;
  --color-warning-light: #FEF3C7;
  --color-warning-light-alt: #FFFBEB;
  --color-warning-dark: #92400E;
  --color-warning-darker: #78350F;
  
  /* Semantic Colors - Error/Critical */
  --color-error: #EF4444;
  --color-error-alt: #DC2626;
  --color-error-light: #FEE2E2;
  --color-error-light-alt: #FEF2F2;
  --color-error-dark: #991B1B;
  --color-error-darker: #7F1D1D;
  
  /* Neutral Grays - Text (WCAG AA Compliant - 4.5:1 contrast ratio) */
  --color-text-primary: #111827;      /* 15.5:1 contrast on white */
  --color-text-primary-alt: #1F2937;  /* 12.6:1 contrast on white */
  --color-text-secondary: #4B5563;    /* 8.6:1 contrast on white - improved from #6B7280 */
  --color-text-secondary-alt: #374151; /* 10.8:1 contrast on white */
  --color-text-tertiary: #6B7280;     /* 4.7:1 contrast on white - meets AA for large text */
  --color-text-muted: #374151;        /* 10.8:1 contrast on white */
  
  /* Neutral Grays - Borders */
  --color-border: #E5E7EB;
  --color-border-alt: #D1D5DB;
  --color-border-light: #F3F4F6;
  
  /* Neutral Grays - Backgrounds */
  --color-bg: #FFFFFF;
  --color-bg-secondary: #F9FAFB;
  --color-bg-tertiary: #F3F4F6;
  --color-bg-muted: #FAFAFA;
  
  /* Issue Severity Colors */
  --color-severity-critical: #DC2626;
  --color-severity-critical-bg: #FEF2F2;
  --color-severity-high: #EA580C;
  --color-severity-high-bg: #FFFBEB;
  --color-severity-medium: #F59E0B;
  --color-severity-medium-bg: #F0F9FF;
  --color-severity-low: #6B7280;
  --color-severity-low-bg: #F9FAFB;
  
  /* Brand Colors (from brand.css) - WCAG AA Compliant */
  --color-brand-primary: #4F46E5;       /* Indigo - 5.7:1 on white */
  --color-brand-primary-light: #6366F1; /* Light Indigo */
  --color-brand-secondary: #8B5CF6;     /* Purple */
  --color-brand-success: #10B981;       /* Green - 3.4:1 (use dark variant for text) */
  --color-brand-success-text: #047857;  /* Dark Green - 4.8:1 on white */
  --color-brand-warning: #F59E0B;       /* Amber - 2.9:1 (use dark variant for text) */
  --color-brand-warning-text: #92400E;  /* Dark Amber - 5.3:1 on white */
  --color-brand-info: #3B82F6;          /* Blue - 4.6:1 on white */
  --color-brand-focus: #4F46E5;         /* Indigo for focus indicators */
  
  /* ============================================
     SPACING TOKENS
     ============================================ */
  
  /* Base unit: 0.25rem (4px) */
  --spacing-xs: 0.25rem;    /* 4px */
  --spacing-sm: 0.5rem;     /* 8px */
  --spacing-md: 0.75rem;    /* 12px */
  --spacing-base: 1rem;     /* 16px */
  --spacing-lg: 1.25rem;    /* 20px */
  --spacing-xl: 1.5rem;     /* 24px */
  --spacing-2xl: 2rem;      /* 32px */
  --spacing-3xl: 2.5rem;    /* 40px */
  
  /* Common Patterns */
  --spacing-card-padding: 0.875rem;      /* 14px */
  --spacing-card-padding-lg: 1.25rem;    /* 20px */
  --spacing-section-margin: 1rem;        /* 16px */
  --spacing-section-margin-lg: 1.5rem;   /* 24px */
  --spacing-container-padding: 1.5rem;   /* 24px */
  --spacing-container-padding-lg: 2rem;  /* 32px */
  --spacing-item-gap: 0.75rem;           /* 12px */
  --spacing-item-gap-lg: 1rem;           /* 16px */
  
  /* Responsive Spacing */
  --spacing-mobile-padding: 0.75rem;     /* 12px */
  --spacing-mobile-padding-lg: 1rem;     /* 16px */
  --spacing-tablet-padding: 1.25rem;     /* 20px */
  --spacing-desktop-padding: 1.5rem;     /* 24px */
  --spacing-desktop-padding-lg: 2rem;    /* 32px */
  
  /* ============================================
     TYPOGRAPHY TOKENS
     ============================================ */
  
  /* Font Family */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  
  /* Font Sizes */
  --font-size-xs: 0.625rem;      /* 10px */
  --font-size-sm: 0.75rem;       /* 12px */
  --font-size-base: 0.875rem;    /* 14px */
  --font-size-md: 1rem;          /* 16px */
  --font-size-lg: 1.125rem;      /* 18px */
  --font-size-xl: 1.25rem;       /* 20px */
  --font-size-2xl: 1.5rem;       /* 24px */
  --font-size-3xl: 1.75rem;      /* 28px */
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.3;
  --line-height-relaxed: 1.5;
  --line-height-loose: 1.6;
  
  /* Letter Spacing */
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: -0.01em;
  --letter-spacing-wide: 0.01em;
  --letter-spacing-wider: 0.02em;
  
  /* ============================================
     BORDER TOKENS
     ============================================ */
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 10px;
  --radius-full: 50%;
  
  /* Border Width */
  --border-width: 1px;
  --border-width-thick: 2px;
  --border-width-thicker: 4px;
  
  /* Border Colors */
  --border-color: var(--color-border);
  --border-color-alt: var(--color-border-alt);
  --border-color-light: var(--color-border-light);
  
  /* ============================================
     SHADOW TOKENS
     ============================================ */
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 4px 12px rgba(0, 0, 0, 0.15);
  
  /* Colored Shadows */
  --shadow-primary: 0 4px 6px rgba(102, 126, 234, 0.3);
  --shadow-primary-hover: 0 4px 12px rgba(102, 126, 234, 0.4);
  --shadow-success: 0 4px 6px rgba(16, 185, 129, 0.2);
  --shadow-warning: 0 4px 12px rgba(245, 158, 11, 0.15);
  --shadow-error: 0 4px 6px rgba(239, 68, 68, 0.2);
  
  /* ============================================
     TRANSITION TOKENS
     ============================================ */
  
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-smooth: 0.25s ease;
  --transition-slow: 0.3s ease;
  
  /* ============================================
     Z-INDEX TOKENS
     ============================================ */
  
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-tooltip: 500;
  
  /* ============================================
     COMPONENT-SPECIFIC TOKENS
     ============================================ */
  
  /* Buttons */
  --button-padding-x: 1.5rem;
  --button-padding-y: 0.75rem;
  --button-border-radius: var(--radius-lg);
  --button-font-size: var(--font-size-md);
  --button-font-weight: var(--font-weight-semibold);
  
  /* Cards */
  --card-padding: var(--spacing-base);
  --card-padding-lg: var(--spacing-card-padding-lg);
  --card-border-radius: var(--radius-lg);
  --card-border: var(--border-width) solid var(--color-border);
  --card-shadow: var(--shadow-sm);
  --card-shadow-hover: var(--shadow-md);
  
  /* Inputs */
  --input-padding-x: 0.75rem;
  --input-padding-y: 0.625rem;
  --input-border-radius: var(--radius-md);
  --input-border: var(--border-width) solid var(--color-border);
  --input-font-size: var(--font-size-base);
  
  /* Tables */
  --table-cell-padding-x: 0.75rem;
  --table-cell-padding-y: 0.625rem;
  --table-header-bg: var(--color-bg-secondary);
  --table-border: var(--border-width) solid var(--color-border);
  --table-font-size: var(--font-size-base);
  
  /* Badges */
  --badge-padding-x: 0.5rem;
  --badge-padding-y: 0.25rem;
  --badge-border-radius: var(--radius-md);
  --badge-font-size: var(--font-size-xs);
  --badge-font-weight: var(--font-weight-bold);
  --badge-letter-spacing: 0.5px;
  
  /* Priority Issues */
  --priority-section-padding: var(--spacing-card-padding-lg);
  --priority-section-border-radius: var(--radius-xl);
  --priority-section-border: 2px solid var(--color-warning);
  --priority-section-shadow: var(--shadow-warning);
  --priority-item-padding: 0.875rem;
  --priority-item-gap: var(--spacing-item-gap);
  --priority-item-border-left: 4px;
  
  /* Health Scorecard */
  --scorecard-padding: var(--spacing-base);
  --scorecard-border-radius: var(--radius-lg);
  --scorecard-gap: var(--spacing-card-padding-lg);
  --scorecard-circle-size: 90px;
  --scorecard-circle-size-mobile: 80px;
  
  /* Tabs */
  --tab-padding-x: 1rem;
  --tab-padding-y: 0.625rem;
  --tab-font-size: var(--font-size-base);
  --tab-active-bg: var(--color-bg-secondary);
  --tab-active-border: 2px solid var(--color-text-primary);
  
  /* ============================================
     RESPONSIVE BREAKPOINTS
     ============================================ */
  
  --breakpoint-mobile: 640px;
  --breakpoint-tablet: 1024px;
  --breakpoint-desktop: 1400px;
  
  /* Container Max Widths */
  --container-max-width: 1400px;
  --container-padding-mobile: var(--spacing-mobile-padding-lg);
  --container-padding-tablet: var(--spacing-tablet-padding);
  --container-padding-desktop: var(--spacing-desktop-padding);
  --container-padding-desktop-lg: var(--spacing-desktop-padding-lg);
  
  /* Responsive Typography */
  --font-size-mobile-xs: 0.625rem;      /* 10px */
  --font-size-mobile-sm: 0.75rem;       /* 12px */
  --font-size-mobile-base: 0.875rem;    /* 14px */
  --font-size-mobile-md: 0.9375rem;     /* 15px */
  --font-size-mobile-lg: 1rem;          /* 16px */
  --font-size-mobile-xl: 1.125rem;      /* 18px */
  --font-size-mobile-2xl: 1.5rem;      /* 24px */
  --font-size-mobile-3xl: 2rem;        /* 32px */
  
  /* Responsive Spacing - Mobile */
  --spacing-mobile-xs: 0.25rem;         /* 4px */
  --spacing-mobile-sm: 0.5rem;          /* 8px */
  --spacing-mobile-md: 0.75rem;         /* 12px */
  --spacing-mobile-base: 1rem;           /* 16px */
  --spacing-mobile-lg: 1.25rem;          /* 20px */
  --spacing-mobile-xl: 1.5rem;           /* 24px */
  
  /* Touch Targets - Minimum 44px for mobile */
  --touch-target-min: 44px;
  --touch-target-comfortable: 48px;
}

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

@media (prefers-color-scheme: dark) {
  :root {
    /* Dark mode tokens can be added here in the future */
    /* For now, we maintain light mode only */
  }
}