<ul class="socialIcons">
  <li class="facebook"><a href=""><i class="fa fa-fw fa-facebook"></i>Facebook</a></li>
  <li class="twitter"><a href=""><i class="fa fa-fw fa-twitter"></i>Twitter</a></li>
  <li class="instagram"><a href=""><i class="fa fa-fw fa-instagram"></i>Instagram</a></li>
  <li class="pinterest"><a href=""><i class="fa fa-fw fa-pinterest-p"></i>Pinterest</a></li>
  <li class="steam"><a href=""><i class="fa fa-fw fa-steam"></i>Steam</a></li>
</ul>

ul.socialIcons {
  padding: 0;
  text-align: center;
}

.socialIcons li {
  background-color: yellow;
  list-style: none;
  display: inline-block;
  margin: 4px;
  border-radius: 2em;
  overflow: hidden;
}

.socialIcons li a {
  display: block;
  padding: 0.5em;
  min-width: 1.28571429em;
  max-width: 1.28571429em;
  height: 1.28571429em;
  white-space: nowrap;
  line-height: 1.5em; /*it's working only when you write text with icon*/
  transition: 0.5s;
  text-decoration: none;
  font-family: arial;
  color: #fff;
}

.socialIcons li i {
  margin-right: 0.5em;
}

.socialIcons li:hover a {
  max-width: 200px;
  padding-right: 1em;
}

.socialIcons .facebook {
  background-color: #3b5998;
  box-shadow: 0 0 16px #3b5998;
}

.socialIcons .twitter {
  background-color: #00aced;
  box-shadow: 0 0 16px #00aced;
}

.socialIcons .instagram {
  background-color: #cd486b;
  box-shadow: 0 0 16px #cd486b;
}

.socialIcons .pinterest {
  background-color: #c92228;
  box-shadow: 0 0 16px #c92228;
}

.socialIcons .steam {
  background-color: #666666;
  box-shadow: 0 0 16px #666666;
}