.drop-down {
  display: flex;
  flex-direction: column;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

.drop-down__main {
  background-color: inherit;
  text-align: left;
  padding: 0.2rem;
  border: none;
  font-size: 2rem;
  cursor: pointer;
  height: 2.5rem;
}

.drop-down__submenu {
  position: absolute;
  top: 3rem;
  background-color: white;
  padding: 0.2rem;
  margin: 0;
  z-index: 1;
  box-shadow: 1px 1px 4px 1px rgb(160, 160, 160),
    -1px -1px 4px 1px rgb(160, 160, 160);
  border-radius: 0.15rem;
  width: intrinsic; /* Safari/WebKit uses a non-standard name */
  width: -moz-max-content; /* Firefox/Gecko */
  width: -webkit-max-content; /* Chrome */
  width: max-content;
  display: none;
}

.drop-down__submenu--visible {
  display: block;

  -webkit-animation: fadeIn 1s;
  animation: fadeIn 1s;

  animation-play-state: running;
  animation-fill-mode: forwards;
}

.drop-down__item {
  list-style: none;
  padding: 0;
  margin: 0;
  height: 2.5rem;
}

.drop-down__link {
  background-color: inherit;
  height: 2.5rem;
  padding: 0.2rem;
  text-align: left;
  transition: color 200ms ease-in-out;
  border: none;
  display: block;
  cursor: pointer;
  font-size: 2rem;
}

.drop-down__link:hover,
.drop-down__link:focus {
  color: rgb(99, 99, 99);
}

@-webkit-keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}