/* START multi-level submenus */
.navbar-nav li > .dropdown-menu {
  display: block;
  visibility: hidden;
  transition-delay: 0.2s;
}

.navbar-nav li:hover > .dropdown-menu {
  visibility: visible;
  transition-delay: 0s;  /* This one doesn't seem to work. */
}
.dropdown-submenu {
    position:relative;
}
.dropdown-submenu>.dropdown-menu {
    top:0;
    left:100%;
    margin-top:-6px;
}

/* rotate caret on hover */
.dropdown-menu > li > a:hover:after {
    text-decoration: underline;
    transform: rotate(-90deg);
} 
/* END multi-level submenus */