drupal-seven-theme-masquerade-css

/**
 * Masquerade block in the Navbar Region.
 */

#masquerade-block-1 div#autocomplete ul {
  padding-top: 3px;
  float: left;
  width: 300px !important;
  margin-top: 30px;
  position: absolute;
  margin-left: 10px;
  border: 1px solid grey;
}
#masquerade-block-1 #autocomplete li.selected {
  background-color: #eee;
}
#masquerade-block-1 #autocomplete li {
  cursor: pointer;
  padding: 4px 8px;
  width: 300px;
  background-color: #fff;
}

#masquerade-block-1 input.form-text {
  width: 300px;
  height: 25px;
  font-size: 14px;
  padding: 10px;
  margin-left: 10px;
  margin-top: 10px;
  border: 1px solid grey;
  margin-bottom: 10px;
}