:root {
    /* Primary Colors - Professional Dark Blue Theme */
    --primary-blue: #1a365d;
    --primary-blue-dark: #0f2040;
    --primary-blue-light: #2d4a80;
    --primary-blue-bright: #3b82f6;
    
    /* Secondary Colors - Professional Apple Green */
    --apple-green: #10b981;
    --apple-green-dark: #059669;
    --apple-green-light: #34d399;
    --apple-green-bright: #a7f3d0;
    
    /* Neutral Colors - Professional Gray Scale */
    --white: #ffffff;
    --off-white: #f8fafc;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Semantic Colors */
    --emergency-red: #dc2626;
    --emergency-red-dark: #b91c1c;
    --warning-orange: #f59e0b;
    --warning-orange-dark: #d97706;
    --success-green: #16a34a;
    --success-green-dark: #15803d;
    
    /* Professional Google Fonts */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Poppins', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-accent: 'Montserrat', 'Poppins', sans-serif;
    
    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows - Professional Depth */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Container Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
    
   /* Z-index Scale */
--z-dropdown: 1000;
--z-sticky: 1020;
--z-fixed: 1030;
--z-modal: 1040;
--z-popover: 1050;
--z-tooltip: 1060;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --white: #0f172a;
        --off-white: #1e293b;
        --gray-100: #334155;
        --gray-900: #f1f5f9;
    }
}