/* key stuff */
.your-centered-div {
    width: 560px; /* you have to have a size or this method doesn't work */
    height: 315px; /* think about making these max-width instead - might give you some more responsiveness */

    position: relative; /* positions out of the flow, but according to the nearest parent */
    top: 0; right: 0; /* confuse it i guess */
    bottom: 0; left: 0;
    margin: auto; /* make em equal */
}


.social:hover {
     -webkit-transform: scale(1.1);
     -moz-transform: scale(1.1);
     -o-transform: scale(1.1);
 }
 .social {
     -webkit-transform: scale(0.8);
     /* Browser Variations: */
     
     -moz-transform: scale(0.8);
     -o-transform: scale(0.8);
     -webkit-transition-duration: 0.5s;
     -moz-transition-duration: 0.5s;
     -o-transition-duration: 0.5s;
 }

/*
    Multicoloured Hover Variations
*/
 
 #social-fb:hover {
     color: #3B5998;
 }
 #social-tw:hover {
     color: #4099FF;
 }
 #social-gp:hover {
     color: #d34836;
 }
 #social-em:hover {
     color: #f39c12;
 }

.masthead {
  height: 100vh;
  min-height: 500px;
  background-image: url('/images/the-bolshoi-brothers-master.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}