.navigation {
  height: 1.5em;
}

nav {

}
nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
nav ul li {

}

nav ul li a:not(:only-child):after,
nav ul li a:visited:not(:only-child):after {
  padding-left: 4px;
  content: " ▾";
}
nav ul li ul li {
  min-width: 150px;
}
nav ul li ul li a {
  padding: 10px;
  line-height: 1.25em;
}