[data-ui-theme="default"] {
  color-scheme: light;

  /* Buttons use the wallpaper-derived aurora control accent; links/tabs keep brand blue. */
  --ui-btn-control-accent: var(--ui-primitive-control-aurora-600);
  --ui-btn-control-accent-strong: var(--ui-primitive-control-aurora-700);
  --ui-btn-control-accent-soft: var(--ui-primitive-control-aurora-50);
}