.icon-twitter::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  z-index: -1;
  transform: scale(0.9);
  
}
.fab.fa-twitter {
  display: inline-block;
  color: rgb(252, 252, 252);
  
}
.icon-twitter:hover {
  background: #000000;
  transform: scale(0.9);
}