ajax.css in Open Social 8.6

/**
 * AJAX (throbber) styling.
 */
@-webkit-keyframes glyphicon-spin {
  0% {
    -webkit-transform: rotate(0deg);
            transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(359deg);
            transform: rotate(359deg);
  }
}
@keyframes glyphicon-spin {
  0% {
    -webkit-transform: rotate(0deg);
            transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(359deg);
            transform: rotate(359deg);
  }
}

.glyphicon-spin {
  display: inline-block;
  -webkit-animation: glyphicon-spin 1s infinite linear;
          animation: glyphicon-spin 1s infinite linear;
}

a .glyphicon-spin {
  display: inline-block;
  text-decoration: none;
}

html.js .btn .ajax-throbber {
  margin-left: .5em;
  margin-right: -.25em;
}

html.js .input-group-addon .glyphicon {
  color: #777777;
  opacity: .5;
  -webkit-transition: 150ms color, 150ms opacity;
  transition: 150ms color, 150ms opacity;
}

html.js .input-group-addon .glyphicon.glyphicon-spin {
  opacity: 1;
}

html.js .ajax-new-content:empty {
  display: none !important;
}

.form-type-managed-file label {
  display: block;
}

.form-managed-file {
  position: relative;
}

.form-managed-file .form-submit[data-drupal-selector*='upload-button'] {
  font-size: 0;
  color: transparent;
}

.form-managed-file .js-hide.form-submit[disabled] {
  position: relative;
  display: inline-block !important;
  width: 40px;
  height: 40px;
  top: 0;
  right: 0;
  padding: 0;
}

.form-managed-file .js-hide.form-submit[disabled] .ajax-throbber {
  position: absolute;
  top: 10px;
  left: 10px;
}

.form-managed-file .js-hide.form-submit[disabled] .ajax-throbber:before {
  top: 0;
}