Inspired by demo(http://twitter.github.io/typeahead.js/examples/). Tested with "jQuery UI CSS Framework 1.8.14"

jquery autocomplete stying

.ui-autocomplete {
  position: absolute;
  top: 100%;
  left: 0;
  right: auto;
  z-index: 1000;
  display: none;
  min-width: 160px;
  _width: 160px;
  padding: 8px 0px;
  margin: 2px 0 0 0;
  list-style: none;
  background-color: #ffffff;
  border-color: #ccc;
  border-color: rgba(0, 0, 0, 0.2);
  border-style: solid;
  border-width: 1px;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  border-radius: 5px;
  -webkit-box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
  -moz-box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
  -webkit-background-clip: padding-box;
  -moz-background-clip: padding;
  background-clip: padding-box;
  *border-right-width: 2px;
  *border-bottom-width: 2px;
}

.ui-autocomplete .ui-menu-item {
  line-height: 24px;
  display: block;
  clear: both;
  font-weight: normal;
  color: #333;
  white-space: nowrap;
}

.ui-autocomplete .ui-menu-item a {
  padding: 5px 10px;
  line-height: none;
}

.ui-autocomplete a.ui-state-focus {
  font-weight: bold;
  margin: 0 !important;
  background-color: #0097cf;
  color: #ffffff;
  text-decoration: none;
  border-radius: 0px;
  -webkit-border-radius: 0px;
  -moz-border-radius: 0px;
  background-image: none;
  border: none;
}