.social:hover {
  background-position:20% 0 ;
  #border-bottom:0px solid #FFFFFF;
  transition:0.2s ease-out all;
  opacity:0.85;
}
.social{ 
  background-position:50% 0%;
  #border-bottom:2px solid #343437;
  transition:0.15s ease-in all;
  opacity:1;
}