.dropdown-container {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  top: 130%;
  right: 0;
  width: 500px;
  height: 400px;
  z-index: 1;
  transition: opacity 0.2s ease-in-out, visibility 0.2s ease-in-out;
}

.dropdown-container:hover .dropdown-menu {
  visibility: visible;
  opacity: 1;
}