:root {
  /* Primary Colors */
  --color-primary: #4C6EF5;
  --color-primary-light: #748FFC;
  --color-primary-dark: #3B5BDB;
  --color-primary-bg: #EDF2FF;
  --color-secondary: #37B24D;
  --color-accent: #F76707;

  /* Neutral */
  --color-bg: #F8F9FA;
  --color-surface: #FFFFFF;
  --color-text: #212529;
  --color-text-secondary: #495057;
  --color-text-tertiary: #868E96;
  --color-text-inverse: #FFFFFF;
  --color-border: #DEE2E6;
  --color-border-light: #E9ECEF;

  /* Semantic */
  --color-success: #37B24D;
  --color-success-bg: #EBFBEE;
  --color-warning: #F59F00;
  --color-warning-bg: #FFF9DB;
  --color-error: #F03E3E;
  --color-error-bg: #FFF5F5;

  /* Category Colors */
  --color-science: #4C6EF5;
  --color-science-bg: #EDF2FF;
  --color-library: #37B24D;
  --color-library-bg: #EBFBEE;
  --color-art: #F76707;
  --color-art-bg: #FFF4E6;
  --color-culture: #AE3EC9;
  --color-culture-bg: #F8F0FC;
  --color-forest: #2F9E44;
  --color-forest-bg: #E6FCF5;
  --color-other: #868E96;
  --color-other-bg: #F1F3F5;

  /* Typography */
  --font-family: 'Pretendard Variable', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-hero: 2.25rem;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.3;
  --line-height-base: 1.6;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 1px 3px 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);
  --shadow-card: 0 2px 8px rgba(0,0,0,0.08);

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Layout */
  --header-height: 56px;
  --max-width: 1280px;
  --sidebar-width: 280px;
}