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Facebook

Facebook

index.html

<div>
  <a href="#"><span>Facebook</span></a>
</div>

style.scss

body {
  background-color:#d34c65;
  text-align:center;
}

div {
  display: inline-block;
  position: absolute;
  top: 50%;
  left: 50%;
  transform:translate(-50%,-50%);
}

a {
  color:#fff;
  background: #DB6E82;
  border-radius:4px;
  text-align:center;
  text-decoration:none;
  font-family:fontawesome;
  position: relative;
  display: inline-block;
  width:40px;
  height:28px;
  padding-top:12px;
  margin:0 2px;
  transition: all .5s;
}

a:hover {
  background: #ef92a3;
}

a span {
  color:#666;
  position:absolute;
  font-family:sans-serif;
  bottom:0;
  left:-25px;
  right:-25px;
  padding:5px 7px;
  z-index:-1;
  font-size:14px;
  border-radius:2px;
  background:#fff;
  visibility:hidden;
  opacity:0;
  transition: all .5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

a span:before {
  content:'';
  width: 0; 
  height: 0; 
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid #fff;
  position:absolute;
  bottom:-5px;
  left:40px;
}

a:hover span {
  bottom:50px;
  visibility:visible;
  opacity:1;
}

a:nth-of-type(1):before {
content:'\f09a';
}