/**
 * CSS Configuration - Theme Variables
 * Central configuration for all colors, sizes, and design tokens
 */

:root {
  /* === Colors === */
  /* Primary */
  --color-primary: #4A90E2;
  --color-primary-dark: #357ABD;
  --color-primary-light: #e3f2fd;
  --color-primary-hover: #f0f7ff;

  /* Secondary */
  --color-secondary: #f5f5f5;
  --color-secondary-dark: #e0e0e0;

  /* Success, Danger, Warning */
  --color-success: #4CAF50;
  --color-success-dark: #45a049;
  --color-danger: #d32f2f;
  --color-danger-hover: #b71c1c;
  --color-warning: #ff9800;

  /* Grays */
  --color-gray-100: #f9f9f9;
  --color-gray-200: #f5f5f5;
  --color-gray-300: #e0e0e0;
  --color-gray-400: #d0d0d0;
  --color-gray-500: #999;
  --color-gray-600: #666;
  --color-gray-700: #333;

  /* Text */
  --color-text-primary: #333;
  --color-text-secondary: #666;
  --color-text-tertiary: #999;
  --color-text-inverse: #fff;

  /* Backgrounds */
  --color-bg-canvas: #f5f5f5;
  --color-bg-white: #fff;
  --color-bg-modal-overlay: rgba(0, 0, 0, 0.5);
  --color-bg-hover: #f5f5f5;
  --color-bg-selection: #e3f2fd;

  /* Borders */
  --color-border: #e0e0e0;
  --color-border-dark: #d0d0d0;
  --color-border-light: #f0f0f0;

  /* === Spacing === */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
  --spacing-2xl: 24px;
  --spacing-3xl: 32px;

  /* === Typography === */
  --font-family-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-family-mono: 'Courier New', monospace;

  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 24px;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* === Border Radius === */
  --radius-sm: 3px;
  --radius-md: 4px;
  --radius-lg: 5px;
  --radius-xl: 6px;
  --radius-2xl: 8px;
  --radius-full: 9999px;

  /* === Shadows === */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.2);

  /* === Transitions === */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
  --transition-slow: 0.3s ease;

  /* === Z-Index === */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 1000;
  --z-modal: 2000;
  --z-popover: 3000;
  --z-tooltip: 4000;

  /* === Layout === */
  --toolbar-height: 50px;
  --table-pane-height: 300px;
  --table-pane-min-height: 150px;
  --resize-handle-height: 6px;

  /* === Component Specific === */
  /* Buttons */
  --btn-padding-sm: 6px 12px;
  --btn-padding-md: 10px 20px;
  --btn-padding-lg: 12px 24px;

  /* Inputs */
  --input-padding: 10px 12px;
  --input-border-width: 1px;
  --input-height: 38px;

  /* Modal */
  --modal-width: 600px;
  --modal-width-lg: 800px;
  --modal-padding: 20px;

  /* Context Menu */
  --context-menu-width: 200px;
  --context-menu-item-padding: 10px 20px;

  /* Table */
  --table-header-height: 40px;
  --table-row-height: 35px;
}

/* === Dark Mode Support (Future) === */
/* @media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #64B5F6;
    --color-bg-canvas: #1a1a1a;
    --color-bg-white: #2a2a2a;
    --color-text-primary: #e0e0e0;
    --color-border: #444;
  }
} */

/* === Responsive Breakpoints === */
:root {
  --breakpoint-mobile: 768px;
  --breakpoint-tablet: 1024px;
  --breakpoint-desktop: 1280px;
}