/* SANDR header — intentionally transparent (no frosted blur).
   The menu now lives as a vertical rail on the left edge and the corner
   controls auto-contrast against page content, so the header bar itself
   needs no background panel. */
.site-head {
  background: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  box-shadow: none;
  border: 0;
}

[data-theme="dark"] .site-head,
.site-head.over-dark {
  background: transparent;
  box-shadow: none;
}