ul#primary-menu li:last-child a {
  background-color: #c41000;
  color: #fff;
  padding: 8px 12px;
  border-radius: 3px;
  box-shadow: 0 1px 2px rgba(0,0,0,.3);
  position: relative;
}

ul#primary-menu li:last-child a:hover {
  top: -1px;
  background-color: #9a0d01;
}