/* CSS Variables - Centralized design system */
:root {
    /* Colors */
    --primary-color: #FF6B35;      /* Orange - Main brand color */
    --primary-light: #FF8A65;      /* Lighter orange for hover states */
    --primary-dark: #E55A2B;       /* Darker orange for active states */
    
    --secondary-color: #666666;    /* Gray - Secondary text and borders */
    --secondary-light: #999999;    /* Lighter gray for subtle elements */
    --secondary-dark: #444444;     /* Darker gray for emphasis */
    
    --background-color: #ffffff;   /* White - Main background */
    --background-light: #f8f9fa;  /* Light gray background for sections */
    --background-dark: #f1f3f4;   /* Darker background for cards */
    
    --text-color: #333333;        /* Dark gray - Main text */
    --text-light: #666666;        /* Light gray - Secondary text */
    --text-muted: #999999;        /* Muted text for metadata */
    
    --success-color: #28a745;     /* Green - Success states */
    --warning-color: #ffc107;     /* Yellow - Warning states */
    --error-color: #dc3545;       /* Red - Error states */
    --info-color: #17a2b8;        /* Blue - Info states */
    
    /* Typography */
    --font-family-primary: 'Arial', 'Helvetica', sans-serif;
    --font-family-secondary: 'Georgia', 'Times', serif;
    --font-family-mono: 'Courier New', 'Monaco', monospace;
    
    --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 */
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.25rem;        /* 4px */
    --spacing-sm: 0.5rem;         /* 8px */
    --spacing-md: 1rem;           /* 16px */
    --spacing-lg: 1.5rem;         /* 24px */
    --spacing-xl: 2rem;           /* 32px */
    --spacing-2xl: 3rem;          /* 48px */
    --spacing-3xl: 4rem;          /* 64px */
    
    /* Layout */
    --container-max-width: 1200px;
    --container-padding: 1.25rem;  /* 20px */
    
    /* Borders */
    --border-radius-sm: 4px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    --border-radius-full: 9999px;
    
    --border-width: 1px;
    --border-width-thick: 2px;
    --border-width-thin: 0.5px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    
    /* Breakpoints */
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;
    --breakpoint-2xl: 1400px;
}