:root {
  --color-primary: #1f4b7a;
  --color-primary-hover: #173a5f;
  --color-success: #227a52;
  --color-warning: #a86600;
  --color-danger: #b33d3d;
  --color-info: #2f6fed;
  --color-bg: #f4f6f8;
  --color-surface: #ffffff;
  --color-border: #dbe2e8;
  --color-text: #1c2733;
  --color-text-muted: #627282;
  --color-focus: #2f6fed;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 10px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --shadow-sm: 0 1px 2px rgba(22, 43, 64, 0.08);
  --shadow-md: 0 8px 24px rgba(22, 43, 64, 0.12);
  --font-sans: "IBM Plex Sans", "Segoe UI", sans-serif;
  --sidebar-width: 240px;
  --topbar-height: 56px;
}

html[data-theme="dark"] {
  --color-primary: #70a7dc;
  --color-primary-hover: #8fbae4;
  --color-success: #3fad78;
  --color-warning: #d79a3a;
  --color-danger: #e06b6b;
  --color-info: #6ea1ff;
  --color-bg: #121920;
  --color-surface: #1d2730;
  --color-border: #354451;
  --color-text: #e8eef3;
  --color-text-muted: #a8b5c0;
  --color-focus: #6ea1ff;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
}

@media (prefers-color-scheme: dark) {
  html[data-theme="system"] {
    --color-primary: #70a7dc;
    --color-primary-hover: #8fbae4;
    --color-success: #3fad78;
    --color-warning: #d79a3a;
    --color-danger: #e06b6b;
    --color-info: #6ea1ff;
    --color-bg: #121920;
    --color-surface: #1d2730;
    --color-border: #354451;
    --color-text: #e8eef3;
    --color-text-muted: #a8b5c0;
    --color-focus: #6ea1ff;
  }
}