/* V5.35: clearer compact controls, complete keyboard states and narrow typography. */
.back-to-top { visibility: hidden; }
.back-to-top.is-visible { visibility: visible; }
@media (max-width: 830px) {
  .site-header .az-logo-sound { width: 44px; height: 44px; }
  .site-header .nav-toggle { width: 44px; min-width: 44px; height: 44px; }
  .site-header .header-utilities .icon-control { min-width: 44px; min-height: 44px; }
}
@media (max-width: 500px) {
  .site-header .wordmark-type { display: none; }
}
@media (max-width: 390px) {
  .az-index .ug-index-title-block h2 { font-size: clamp(38px, 12.5vw, 47px); }
}