style.css

body{
  font-family: "poppins", sans-serif;
  background-color: #16192c;
  text-align: center;
  color: #e427c4;
  font-size: 28px;
}

.share{
  position: absolute;
  width: 500px;
  left: 50%;
  transform: translateX(-50%);
  top: 50%;
  margin-top: -40px;
  border-radius: 80px;
}

.share a {
  width: 80px;
  text-align: center;
  line-height: 80px;
  display: inline-block;
  background-color: #fff;
  color: #fff;
  overflow: hidden;
  opacity: 1;
  margin: 0 -20px;
  box-shadow: 3px 1px 3px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease-in-out;
}

.share span{
  width: 300px;
  display: inline-block;
  font-weight: 700;
  text-transform: uppercase;
  line-height: 80px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  opacity: 1;
  pointer-events: none;
  color: #16192c;
  transition: opacity 0.3s ease-in-out;
}

.share a:nth-child(1) {
  border-top-left-radius: 40px;
  border-bottom-left-radius: 40px;
  margin-left: 0;
}

.share a:nth-child(4) {
  border-top-right-radius: 40px;
  border-bottom-right-radius: 40px;
  margin-right: 0;
}

.share a:nth-child(1):hover {
  background-color: #375daf;
}

.share a:nth-child(2):hover {
  background-color: #33beff;
}
.share a:nth-child(3):hover {
  background-color: #e42785;
}
.share a:nth-child(4):hover {
  background-color: #ce1d1d;
}

.share:hover span{
  opacity: 0;
}

.share nav{
  font-size: 0;
}

.share:hover a {
  border-radius: 50%;
  margin: 0 10px;
  color: #16192c;
  font-size: 28px;
}

.share:hover a:hover{
  color: #fff;
}