.version-toggle {
  background: none;
  border: 0;
  color: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  font: inherit;
  padding: 0;
}

.version-toggle:focus {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

.version-toggle::before {
  content: '\25B8';
  display: inline-block;
  transform-origin: center;
}

.version-toggle[aria-expanded='true']::before {
  content: '\25BE';
}

.wy-menu-vertical ul.version-collapsed {
  display: none;
}