:root {
  /* Background layers */
  --bg-base: #0d1117;
  --bg-surface: #161b22;
  --bg-elevated: #1c2128;
  --bg-overlay: #2d333b;
  --bg-hover: #292e36;

  /* Text */
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
  --text-inverse: #0d1117;

  /* Accents */
  --rhino-accent: #58a6ff;
  --rhino-accent-dim: #1f3a5f;
  --gh-accent: #3fb950;
  --gh-accent-dim: #1a3d25;
  --pareto-accent: #f0883e;
  --pareto-accent-dim: #4a2c14;
  --warning: #d29922;
  --error: #f85149;
  --success: #3fb950;

  /* GH Component colors */
  --comp-param: #76b947;
  --comp-math: #b0b0b0;
  --comp-curve: #8fa4b8;
  --comp-surface: #a18dc2;
  --comp-transform: #c4a35a;
  --comp-wire: #888;
  --comp-wire-active: #58a6ff;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Typography */
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --line-height: 1.6;

  /* Borders */
  --border-color: #30363d;
  --border-color-light: #3d444d;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);

  /* Sidebar */
  --sidebar-width: 280px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
}