body {
  text-align: center;
  font-family: Arial;
  background: #f6fbf9;
}

.buttons {
  margin-top: 160px;
}
.buttons a {
  margin-right: 30px;
  width: 64px;
  height: 64px;
  font-size: 24px;
  display: inline-block;
  position: relative;
  line-height: 64px;
  background-color: #eaeaea;
  background-image: linear-gradient(to bottom, #f6f6f6, #eaeaea);
  border-radius: 32px;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.25), 0 2px 3px rgba(0, 0, 0, 0.1);
}
.buttons a:active {
  top: 1px;
  background-image: linear-gradient(to bottom, #eaeaea, #f6f6f6);
}
.buttons a:active::before {
  top: -9px;
}
.buttons a::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -8px;
  right: -8px;
  bottom: -8px;
  left: -8px;
  background-color: #eaeaea;
  border-radius: 140px;
  opacity: 0.5;
}
:hover .buttons a::before {
  opacity: 1;
}

.fa-github {
  color: #0f2f22;
}

.fa-linkedin {
  color: #0a66c2;
}

.fa-xing {
  color: #0698a0;
}

.github:hover::before {
  background-color: #0f2f22;
}

.linkedin:hover::before {
  background-color: #0a66c2;
}

.xing:hover::before {
  background-color: #0698a0;
}