/* ============================================
   RentxHub INV - CSS Variables
   Color Palette, Spacing, Typography, Shadows
   ============================================ */

:root {
    /* ============================================
       COLOR PALETTE - Blue Theme
       ============================================ */
    
    /* Primary Colors (Blue) */
    --primary-dark-blue: #2c4875;
    --primary-blue: #4a6fa5;
    --primary-light-blue: #6b8fc9;
    --primary-extra-light: #e8f0ff;
    
    /* Shorthand Primary (for consistency) */
    --primary-color: #1067f0;
    --primary-dark: #0f52ba;
    --primary-light: #3b82f6;
    
    /* Accent Colors (Orange/Yellow) */
    --accent-orange: #f59e0b;
    --accent-light: #fef3c7;
    --accent-dark: #d97706;
    
    /* Neutral Colors */
    --white: #ffffff;
    --black: #000000;
    --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 */
    --success: #10b981;
    --success-light: #d1fae5;
    --success-dark: #047857;
    --success-color: #10b981;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --danger-dark: #dc2626;
    --danger-color: #ef4444;
    --info: #3b82f6;
    --info-light: #dbeafe;
    
    /* Text Colors */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    
    /* Background Colors */
    --bg-light: #f9fafb;
    --bg-secondary: #e5e7eb;
    
    /* Border Colors */
    --border-color: #e5e7eb;
    
    /* ============================================
       TYPOGRAPHY
       ============================================ */
    
    /* Font Families */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-secondary: 'Poppins', sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    
    /* Font Sizes */
    --font-xs: 0.75rem;      /* 12px */
    --font-sm: 0.875rem;     /* 14px */
    --font-base: 1rem;       /* 16px */
    --font-lg: 1.125rem;     /* 18px */
    --font-xl: 1.25rem;      /* 20px */
    --font-2xl: 1.5rem;      /* 24px */
    --font-3xl: 1.875rem;    /* 30px */
    --font-4xl: 2.25rem;     /* 36px */
    --font-5xl: 3rem;        /* 48px */
    
    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    
    /* Line Heights */
    --line-tight: 1.25;
    --line-normal: 1.5;
    --line-relaxed: 1.75;
    --line-loose: 2;
    
    /* ============================================
       SPACING SYSTEM
       ============================================ */
    
    --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 */
    
    /* ============================================
       BORDERS & RADIUS
       ============================================ */
    
    /* Border Radius */
    --radius-sm: 0.25rem;   /* 4px */
    --radius-md: 0.375rem;  /* 6px */
    --radius-lg: 0.5rem;    /* 8px */
    --radius-xl: 0.75rem;   /* 12px */
    --radius-2xl: 1rem;     /* 16px */
    --radius-full: 9999px;
    
    /* Border Widths */
    --border-thin: 1px;
    --border-medium: 2px;
    --border-thick: 4px;
    
    /* ============================================
       SHADOWS
       ============================================ */
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    
    /* ============================================
       Z-INDEX SCALE
       ============================================ */
    
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    
    /* ============================================
       TRANSITIONS
       ============================================ */
    
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    
    /* ============================================
       BREAKPOINTS (for reference)
       ============================================ */
    
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;
    
    /* ============================================
       LAYOUT WIDTHS
       ============================================ */
    
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
    
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 70px;
    --header-height: 70px;
}