:root {
  /* Color — dark enterprise palette */
  --color-bg: #08080c;
  --color-bg-elevated: #0f0f14;
  --color-surface: #14141c;
  --color-surface-2: #1a1a24;
  --color-surface-3: #22222e;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.14);
  --color-text: #f4f4f5;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;
  --color-primary: #6366f1;
  --color-primary-hover: #818cf8;
  --color-primary-soft: rgba(99, 102, 241, 0.12);
  --color-primary-glow: rgba(99, 102, 241, 0.35);
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;

  /* 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;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 0 1px var(--color-border), 0 8px 32px var(--color-primary-glow);

  /* Layout */
  --header-height: 64px;
  --container-max: 1280px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}