.fa {
    width: 50px;
    padding: 20px;
    text-align: center;
    text-decoration: none;
    font-size: 40px !important;    
    margin: 10px 2px;
}
.fa:hover {
    opacity: 0.7;
}
.fa-facebook {
  background: #3B5998;
  color: white;
}
.fa-twitter {
  background: #55ACEE;
  color: white;
}
.fa-google {
  background: #dd4b39;
  color: white;
}
.fa-linkedin {
  background: #007bb5;
  color: white;
}
.fa-youtube {
  background: #bb0000;
  color: white;
}