/**
 * CSS Custom Properties (Variables)
 *
 * This file contains all shared CSS variables for consistent styling
 * across the RealEstate CRM application.
 *
 * Usage:
 *   1. Include this file first in your HTML:
 *      <link rel="stylesheet" href="/static/styles/variables.css">
 *   2. Use variables in your CSS:
 *      color: var(--color-primary);
 *      font-family: var(--font-primary);
 */

:root {
  /* ========================================
     COLOR PALETTE
     ======================================== */

  /* Primary Colors */
  --color-primary: #216BF4;
  --color-primary-hover: #1d5ed8;
  --color-primary-light: #3b82f6;
  --color-primary-dark: #1d4ed8;

  /* Secondary/Accent Colors */
  --color-secondary: #2563eb;
  --color-accent: #1a73e8;
  --color-accent-light: #2979ff;

  /* Success/Error/Warning Colors */
  --color-success: #36f421;
  --color-success-dark: #059669;
  --color-error: #dc2626;
  --color-error-light: #ff4444;
  --color-error-dark: #dc3545;
  --color-warning: #f59e0b;

  /* Neutral Colors - Text */
  --color-text-primary: #333333;
  --color-text-secondary: #666666;
  --color-text-muted: #9ca3af;
  --color-text-light: #555555;
  --color-text-dark: #212529;
  --color-text-darker: #1f2937;

  /* Neutral Colors - Backgrounds */
  --color-bg-white: #ffffff;
  --color-bg-light: #f8f9fa;
  --color-bg-lighter: #F7F8FC;
  --color-bg-gray: #f5f5f7;
  --color-bg-gray-light: #f0f0f0;
  --color-bg-gray-medium: #e9ecef;

  /* Neutral Colors - Borders */
  --color-border-light: #e0e0e0;
  --color-border-medium: #ddd;
  --color-border-dark: #ccc;

  /* Black & White */
  --color-black: #000000;
  --color-white: #ffffff;

  /* ========================================
     TYPOGRAPHY
     ======================================== */

  /* Font Families */
  --font-primary: "Vela Sans GX", "Vela Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Courier New', monospace;

  /* Font Sizes */
  --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 */

  /* Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* ========================================
     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 */

  /* ========================================
     BORDERS & RADIUS
     ======================================== */

  --border-width: 1px;
  --border-width-medium: 2px;

  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  --border-radius-2xl: 24px;
  --border-radius-full: 9999px;

  /* ========================================
     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-card: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-modal: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* ========================================
     TRANSITIONS
     ======================================== */

  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;

  /* ========================================
     Z-INDEX SCALE
     ======================================== */

  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-toast: 800;

  /* ========================================
     BREAKPOINTS (for reference in JS)
     ======================================== */

  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;

  /* ========================================
     LAYOUT
     ======================================== */

  --container-max-width: 1200px;
  --sidebar-width: 250px;
  --header-height: 64px;
}

/* Dark theme support (future use) */
@media (prefers-color-scheme: dark) {
  :root {
    /* Uncomment and customize for dark theme */
    /* --color-bg-white: #1f2937;
    --color-text-primary: #f3f4f6;
    --color-text-secondary: #d1d5db; */
  }
}