#flags {
  left: 79.35%;
  list-style: none;
  margin: 0;
  padding: 0;
  position: fixed;
  top: 0.4em;
}

#flags > li {
  margin-bottom: 0.4em;
  opacity: 0.4;
}

#flags > li:hover {
  opacity: 1;
  
  -webkit-transition: opacity 175ms ease-in-out;
  -moz-transition: opacity 175ms ease-in-out;
  -ms-transition: opacity 175ms ease-in-out;
  -o-transition: opacity 175ms ease-in-out;
  transition: opacity 175ms ease-in-out;
}