/* Default (expanded = true) → show minus, hide plus */

.collapsible-toggle .button-icon-plus {
  display: none;
}

.collapsible-toggle .button-icon-minus {
  display: inline;
}

/* Collapsed (expanded = false) → show plus, hide minus */

.collapsible-toggle[aria-expanded="false"] .button-icon-plus {
  display: inline;
}

.collapsible-toggle[aria-expanded="false"] .button-icon-minus {
  display: none;
}