:root {
  /* Font */
  --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;

  /* Colors - Brand */
  --color-primary: #2563EB;
  --color-primary-dark: #1D4ED8;
  --color-primary-light: #EFF6FF;
  --color-primary-border: #BFDBFE;

  /* Colors - Semantic */
  --color-success: #10B981;
  --color-success-light: #ECFDF5;
  --color-warning: #F59E0B;
  --color-warning-light: #FFFBEB;
  --color-error: #EF4444;
  --color-error-light: #FEF2F2;

  /* Colors - Neutral */
  --color-text: #111827;
  --color-text-secondary: #6B7280;
  --color-text-muted: #9CA3AF;
  --color-border: #E5E7EB;
  --color-border-light: #F3F4F6;
  --color-bg: #F8FAFC;
  --color-bg-white: #FFFFFF;
  --color-bg-hover: #F3F4F6;

  /* Colors - Sidebar */
  --color-sidebar-bg: #1E293B;
  --color-sidebar-text: #CBD5E1;
  --color-sidebar-text-active: #FFFFFF;
  --color-sidebar-hover: #334155;
  --color-sidebar-active: #2563EB;
  --color-sidebar-border: #334155;
  --color-sidebar-muted: #64748B;

  /* Layout */
  --header-height: 60px;
  --sidebar-width: 248px;
  --right-panel-width: 288px;
  --footer-height: 72px;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Border radius */
  --radius-sm: 4px;
  --radius: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);

  /* Typography */
  --text-xs: 11px;
  --text-sm: 13px;
  --text-base: 15px;
  --text-md: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 30px;
  --text-4xl: 36px;

  /* Font weights */
  --font-regular: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* Line heights */
  --leading-tight: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

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

  /* Z-index */
  --z-sidebar: 100;
  --z-header: 200;
  --z-overlay: 150;
  --z-toast: 500;
}