:root {
  /* Colors */
  --color-primary: #1677ff;
  --color-primary-hover: #4096ff;
  --color-primary-active: #0958d9;
  --color-success: #52c41a;
  --color-warning: #faad14;
  --color-error: #ff4d4f;
  --color-info: #1677ff;

  /* Text */
  --text-primary: #1f1f1f;
  --text-secondary: #666;
  --text-tertiary: #999;
  --text-disabled: #bfbfbf;
  --text-inverse: #fff;

  /* Background */
  --bg-body: #f0f2f5;
  --bg-container: #fff;
  --bg-component: #f5f5f5;
  --bg-hover: rgba(0,0,0,0.04);
  --bg-active: rgba(0,0,0,0.06);
  --bg-mask: rgba(0,0,0,0.45);

  /* Border */
  --border-color: #d9d9d9;
  --border-light: #f0f0f0;
  --border-radius: 6px;
  --border-radius-lg: 8px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Layout */
  --sidebar-width: 220px;
  --sidebar-collapsed-width: 64px;
  --header-height: 56px;

  /* Transition */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}