:root {
  color-scheme: light;

  --color-primary: #1f4e78;
  --color-primary-hover: #17405f;
  --color-primary-soft: #e8eff5;
  --color-secondary: #55606e;
  --color-background: #f4f6f9;
  --color-surface: #ffffff;
  --color-surface-alt: #f8fafc;
  --color-border: #e3e8ef;
  --color-border-strong: #cbd5e1;
  --color-text: #1b2430;
  --color-muted: #64748b;
  --color-success: #1a7f4e;
  --color-success-soft: #e6f4ec;
  --color-warning: #b26a00;
  --color-warning-soft: #fdf3e3;
  --color-danger: #c0302b;
  --color-danger-soft: #fbeaea;
  --color-info: #2563eb;
  --color-info-soft: #e9effd;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 4px 12px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 12px 32px rgba(16, 24, 40, 0.14);

  --transition-fast: 150ms ease;

  --sidebar-width: 260px;
  --topbar-height: 60px;
}

:root[data-theme="dark"] {
  color-scheme: dark;

  --color-primary: #5b9bd5;
  --color-primary-hover: #74ade0;
  --color-primary-soft: #1c3147;
  --color-secondary: #9fb0c4;
  --color-background: #0e141b;
  --color-surface: #161e27;
  --color-surface-alt: #1d2733;
  --color-border: #263241;
  --color-border-strong: #38475a;
  --color-text: #e7edf4;
  --color-muted: #8fa1b5;
  --color-success: #3fb584;
  --color-success-soft: #123227;
  --color-warning: #e2a63d;
  --color-warning-soft: #322811;
  --color-danger: #e2706b;
  --color-danger-soft: #3b1c1a;
  --color-info: #74a9f8;
  --color-info-soft: #172c4d;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.55);
}