:root {
  /* Colors - Light */
  --color-bg: #ffffff;
  --color-surface: #f8f9fa;
  --color-border: #e1e4e8;
  --color-text: #1a1a2e;
  --color-text-secondary: #586069;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-code-bg: #f1f3f5;
  --color-card-shadow: rgba(0, 0, 0, 0.06);
  --color-nav-bg: rgba(255, 255, 255, 0.85);

  /* Typography */
  --font-sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Noto Sans KR", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", Consolas, monospace;
  --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: 2rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Layout */
  --max-width: 720px;
  --nav-height: 60px;
  --border-radius: 8px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
}

[data-theme="dark"] {
  --color-bg: #0d1117;
  --color-surface: #161b22;
  --color-border: #30363d;
  --color-text: #e6edf3;
  --color-text-secondary: #8b949e;
  --color-primary: #58a6ff;
  --color-primary-hover: #79b8ff;
  --color-code-bg: #1c2128;
  --color-card-shadow: rgba(0, 0, 0, 0.3);
  --color-nav-bg: rgba(13, 17, 23, 0.85);
}