.dropdown-menu {
  margin-top: 0;
}
.dropdown-menu .dropdown-toggle::after {
  vertical-align: middle;
  border-left: 4px solid;
  border-bottom: 4px solid transparent;
  border-top: 4px solid transparent;
}
.dropdown-menu .dropdown .dropdown-menu {
  left: 100%;
  top: 0%;
  margin: 0 20px;
  border-width: 0;
}
.dropdown-menu .dropdown .dropdown-menu.left {
  right: 100%;
  left: auto;
}
@media (min-width: 768px) {
  .dropdown-menu .dropdown .dropdown-menu {
    margin: 0;
    border-width: 1px;
  }

  .dropdown-menu > li a:hover,
  .dropdown-menu > li.show {
    background: #007bff;
    color: white;
  }
  .dropdown-menu > li.show > a {
    color: white;
  }
}