:root {
  --sk-size: 40px;
  --sk-color: #333;
}

.ajax-throbber {
  position: relative;
  width: 40px;
  height: 40px;
}

/* Override core throbber */
.ajax-progress.ajax-progress-fullscreen {
  position: fixed;
  z-index: 11000;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  overflow: visible;
  width: 2em;
  height: 2em;
  margin: auto;
  background-color: transparent;
  background-image: none;
}