* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #000;
  margin: 0 20%;
}
ul {
  display: flex;
  width: 100%;
  justify-content: space-evenly;
}
li {
  list-style: none;
  position: relative;
}
.fa {
  font-size: 6em;
  color: #333;
}
li::before {
  font-family: fontAwesome;
  font-size: 6em;
  transition: all 0.3s ease-in-out;
  height: 0;
  position: absolute;
  overflow: hidden;
  top: 0;
  left: 0;
}
li:hover::before {
  height: 100%;
}
li:nth-child(1)::before {
  color: #1da1f2;
  content: "\f099";
  border-bottom: 4px solid #1da1f2;
}
li:nth-child(2)::before {
  color: #25d366;
  content: "\f232";
  border-bottom: 4px solid #25d366;
}
li:nth-child(3)::before {
  color: #ff0000;
  content: "\f16a";
  border-bottom: 4px solid #ff0000;
}