.dropdown-submenu {
  position: relative;
}

.dropdown-submenu > .dropdown-menu {
  top: 0;
  left: 100%;
  margin-top: -6px;
  margin-left: -1px;
  border-radius: 0 6px 6px 6px;
  display: none;
}

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

@media (max-width: 991px) {
  .dropdown-submenu > .dropdown-menu {
    left: 0;
    position: static;
    margin-left: 1rem;
    border-left: 2px solid #dee2e6;
  }
}

.card-img {
  margin-top: 30px;
}