fieldset.ief-form {
  position: relative;
}

fieldset.ief-form .ajax-progress.ajax-progress-throbber {
  backdrop-filter: blur(1px);
  background: #EEEEEE33;
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: space-around;
  left: 0;
  position: absolute;
  top: 0;
  width: 100%;
}

fieldset.ief-form .ajax-progress.ajax-progress-throbber .throbber {
  background: url(/core/misc/loading-small.gif) no-repeat 0 center;
  background-size: contain;
  border-radius: 8px;
  height: 32px;
  margin-left: calc(50% - 10px);
  position: absolute;
  width: 18px;
}

fieldset.ief-form .ajax-progress.ajax-progress-throbber .message {
  display: none;
}