nav ul {
  list-style: none;
}

nav li {
  display: inline-block;
}

nav li a {
  display: block;
  padding: 10px;
  text-decoration: none;
  color: #333;
}

.dropdown-menu {
  display: none;
  position: absolute;
  background-color: #fff;
  padding: 0;
  list-style: none;
}

.dropdown:hover .dropdown-menu {
  display: block;
}

.dropdown-menu li {
  display: block;
}

.dropdown-menu li a {
  display: block;
  padding: 10px;
  text-decoration: none;
  color: #333;
}

.dropdown-menu li a:hover {
  background-color: #f1f1f1;
}