:root {
  /* Win11 Fluent accent (from tairs-user-manager login) */
  --color-primary: #0078d4;
  --color-primary-dark: #005a9e;
  --color-primary-light: rgba(0, 120, 212, 0.12);
  --color-accent: #0078d4;

  --color-primary-top: #1a84d8;
  --color-primary-mid: #0078d4;
  --color-primary-bottom: #0072c9;
  --gradient-primary: linear-gradient(
    180deg,
    var(--color-primary-top) 0%,
    var(--color-primary-mid) 52%,
    var(--color-primary-bottom) 100%
  );

  --color-text: #1f1f1f;
  --color-text-muted: #616161;
  --color-danger: #d13438;
  --color-success: #107c10;

  --font-size-base: 13px;
  --font-sans: "Segoe UI Variable", "Segoe UI", "Inter", system-ui, -apple-system, sans-serif;
  --transition: 180ms cubic-bezier(0.33, 0, 0.1, 1);
}