Fade Dropdown

<div class="nuda-ddf">
  <button class="nuda-ddf__trigger">Menu ▾</button>
  <ul class="nuda-ddf__menu">
    <li class="nuda-ddf__item">Profile</li>
    <li class="nuda-ddf__item">Settings</li>
    <li class="nuda-ddf__item">Sign out</li>
  </ul>
</div>

.nuda-ddf {
  position: relative;
  display: inline-block;
  font-family: inherit;
}

.nuda-ddf__trigger {
  background: #1a1a1a;
  color: #fafafa;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 8px;
  padding: .5rem .9rem;
  font-size: .8rem;
  cursor: pointer;
}

.nuda-ddf__menu {
  list-style: none;
  margin: .4rem 0 0;
  padding: .35rem;
  min-width: 160px;
  background: #141414;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 10px;
  box-shadow: 0 12px 30px -12px rgba(0,0,0,.6);
  animation: _ddfIn .2s ease-out;
}

.nuda-ddf__item {
  padding: .5rem .6rem;
  border-radius: 6px;
  font-size: .8rem;
  color: #cfcfcf;
  cursor: pointer;
  transition: background .15s,color .15s;
}

.nuda-ddf__item:hover {
  background: rgba(228,255,84,.1);
  color: #fafafa;
}

@keyframes _ddfIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion:reduce) {
  .nuda-ddf__menu {
    animation: none;
  }
}