/* =============================================
   CSS Variables - Design System Tokens
   ============================================= */

:root {
  /* Color Palette */
  --color-primary: #1f6feb;
  --color-primary-hover: #1a5ecf;
  --color-primary-light: #d0e3ff;
  --color-primary-bg: #f0f6ff;
  
  --color-success: #2da44e;
  --color-success-light: #d4edda;
  
  --color-warning: #d97706;
  --color-warning-light: #fff3cd;
  
  --color-danger: #b3261e;
  --color-danger-light: #f8d7da;
  
  --color-text-primary: #1f2328;
  --color-text-secondary: #555;
  --color-text-muted: #888;
  --color-text-light: #aaa;
  
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f6f8fa;
  --color-bg-tertiary: #f5f5f5;
  --color-bg-canvas: #1e1e2e;
  
  --color-border: #d0d7de;
  --color-border-light: #eee;
  --color-border-dark: #ccc;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 24px;
  --spacing-2xl: 32px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.15);
  --shadow-node: 0 2px 8px rgba(0, 0, 0, 0.12);
  --shadow-node-hover: 0 4px 16px rgba(0, 0, 0, 0.18);
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 24px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
  --transition-slow: 0.3s ease;
  
  /* Z-Index Layers */
  --z-dropdown: 100;
  --z-modal-backdrop: 1000;
  --z-modal: 1001;
  --z-tooltip: 1100;
  
  /* Canvas specific */
  --canvas-grid-size: 20px;
  --canvas-node-width: 200px;
  --canvas-node-min-height: 80px;
  --canvas-port-size: 12px;
}