ul.social-icons {
  padding: 0;
  margin: 0;
}

.social-icons li {
  display: inline-block;
  padding-right: 15px;
}

.social-icons a {
  opacity: .5;
}

.social-icons a:hover {
  opacity: 1;
}

.social-icons li a img {
  width: 30px;
  height: 30px;
}