ul.dropdown,
ul.dropdown li,
ul.dropdown ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

ul.dropdown {
  position: relative;
  z-index: 597;
}

ul.dropdown li {
  float: left;
  vertical-align: middle;
}

ul.dropdown li.hover,
ul.dropdown li:hover {
  position: relative;
  z-index: 599;
  cursor: default;
}

ul.dropdown ul {
  visibility: hidden;
  position: absolute;
  z-index: 598;
}

ul.dropdown li:hover > ul {
  visibility: visible;
}