.header {
    background-color:#0b5942;
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.4);
}

.dropdown-submenu {
    position: relative;
  }
  .dropdown-submenu > .dropdown-menu {
    top: 0;
    left: 100%;
    margin-top: -6px;
  }