autocomplete.css in Open Social 8.9

.ui-autocomplete.ui-widget-content {
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.16), 0 6px 12px rgba(0, 0, 0, 0.32);
  background: white;
  padding: 0;
  list-style: none;
  max-height: 305px;
  overflow-y: auto;
}

.ui-autocomplete.ui-widget-content.upward {
  bottom: 38px;
  top: auto !important;
}

.ui-autocomplete.ui-widget-content .ui-menu-item {
  font-size: 0.875rem;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: #555555;
  cursor: pointer;
}

.ui-autocomplete.ui-widget-content .ui-menu-item > a {
  padding: 7px 10px;
  display: flex;
}

.ui-autocomplete.ui-widget-content .ui-menu-item .ui-state-active {
  background-color: #e6e6e6;
}

.ui-autocomplete.ui-widget-content .ui-menu-item .mention__avatar {
  flex: 0 0 24px;
  max-width: 24px;
  margin-right: 10px;
}

.ui-autocomplete.ui-widget-content .ui-menu-item .mention__name {
  align-self: center;
  flex-grow: 1;
}

.ui-autocomplete.ui-widget-content .ui-menu-item:hover {
  background: #e6e6e6;
  border: 0;
}

.ui-autocomplete.ui-widget-content::-webkit-scrollbar-track {
  -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.1);
  background-color: #f7f7f7;
}

.ui-autocomplete.ui-widget-content::-webkit-scrollbar {
  width: 12px;
  background-color: #f7f7f7;
}

.ui-autocomplete.ui-widget-content::-webkit-scrollbar-thumb {
  -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.1);
  background-color: #777777;
}

.ui-autocomplete {
  margin-top: -1px;
  padding-top: 0;
  padding-bottom: 0;
}

.ui-front {
  z-index: 1060;
}

.ui-widget-header {
  font-weight: 700;
}

.ui-menu .ui-state-focus,
.ui-menu .ui-state-active {
  margin: 0;
}

/* Interaction states
----------------------------------*/
.ui-state-default a,
.ui-state-default a:link,
.ui-state-default a:visited {
  color: #555555;
}

.ui-autocomplete .ui-state-hover,
.ui-autocomplete .ui-state-focus {
  background: #e6e6e6;
}

.ui-state-hover a,
.ui-state-hover a:hover,
.ui-state-hover a:link,
.ui-state-hover a:visited,
.ui-state-focus a,
.ui-state-focus a:hover,
.ui-state-focus a:link,
.ui-state-focus a:visited {
  color: #212121;
  text-decoration: none;
}

.ui-autocomplete .ui-state-active a,
.ui-autocomplete .ui-state-active a:link,
.ui-autocomplete .ui-state-active a:visited {
  color: #212121;
  text-decoration: none;
}

/* Interaction Cues
----------------------------------*/
.ui-state-highlight,
.ui-widget-content .ui-state-highlight,
.ui-widget-header .ui-state-highlight {
  border: 1px solid #e6e6e6;
  background: #e6e6e6;
  color: #363636;
}

.ui-state-highlight a,
.ui-widget-content .ui-state-highlight a,
.ui-widget-header .ui-state-highlight a {
  color: #363636;
}

.ui-state-error,
.ui-widget-content .ui-state-error,
.ui-widget-header .ui-state-error {
  border: 1px solid #cd0a0a;
  background: #fef1ec url("images/ui-bg_glass_95_fef1ec_1x400.png") 50% 50% repeat-x;
  color: #cd0a0a;
}

.ui-state-error a,
.ui-widget-content .ui-state-error a,
.ui-widget-header .ui-state-error a {
  color: #cd0a0a;
}

.ui-state-error-text,
.ui-widget-content .ui-state-error-text,
.ui-widget-header .ui-state-error-text {
  color: #cd0a0a;
}

.ui-priority-primary,
.ui-widget-content .ui-priority-primary,
.ui-widget-header .ui-priority-primary {
  font-weight: bold;
}

.ui-priority-secondary,
.ui-widget-content .ui-priority-secondary,
.ui-widget-header .ui-priority-secondary {
  opacity: .7;
  filter: Alpha(Opacity=70);
  /* support: IE8 */
  font-weight: normal;
}

.ui-state-disabled,
.ui-widget-content .ui-state-disabled,
.ui-widget-header .ui-state-disabled {
  opacity: .35;
  filter: Alpha(Opacity=35);
  /* support: IE8 */
  background-image: none;
}

.ui-state-disabled .ui-icon {
  filter: Alpha(Opacity=35);
  /* support: IE8 - See #6059 */
}

/* Layout helpers
----------------------------------*/
.ui-helper-hidden {
  display: none;
}

.ui-helper-hidden-accessible {
  border: 0;
  clip: rect(0 0 0 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
}

.ui-helper-reset {
  margin: 0;
  padding: 0;
  border: 0;
  outline: 0;
  line-height: 1.3;
  text-decoration: none;
  font-size: 100%;
  list-style: none;
}

.ui-helper-clearfix {
  min-height: 0;
  /* support: IE7 */
}

.ui-helper-zfix {
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  position: absolute;
  opacity: 0;
  filter: Alpha(Opacity=0);
  /* support: IE8 */
}

/* Interaction Cues
----------------------------------*/
.ui-state-disabled {
  cursor: default !important;
}

/* Misc visuals
----------------------------------*/
/* Overlays */
.ui-widget-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}