.social-buttons {
  height: 90px;
  margin: auto;
  font-size: 0;
  text-align: center;
  margin-bottom: 20px;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}

.social-button {
  display: inline-block;
  background-color: #fff;
  width: 90px;
  height: 90px;
  line-height: 90px;
  margin: 0 10px;
  text-align: center;
  position: relative;
  overflow: hidden;
  opacity: 0.99;
  border-radius: 28%;
  box-shadow: 0 0 30px 0 rgba(0, 0, 0, 0.05);
  transition: all 0.35s cubic-bezier(0.31, -0.105, 0.43, 1.59);
}
.social-button:before {
  content: "";
  background-color: #000;
  width: 120%;
  height: 120%;
  position: absolute;
  top: 90%;
  left: -110%;
  transform: rotate(45deg);
  transition: all 0.35s cubic-bezier(0.31, -0.105, 0.43, 1.59);
}
.social-button .fa {
  font-size: 38px;
  vertical-align: middle;
  transform: scale(0.8);
  transition: all 0.35s cubic-bezier(0.31, -0.105, 0.43, 1.59);
}
.social-button.facebook:before {
  background-color: #3B5998;
}
.social-button.facebook .fa {
  color: #3B5998;
}
.social-button.twitter:before {
  background-color: #24cc62;
}
.social-button.twitter .fa {
  color: #24cc62;
}
.social-button.google:before {
  background-color: #DC4A38;
}
.social-button.google .fa {
  color: #DC4A38;
}
.social-button.dribbble:before {
  background-color: #F26798;
}
.social-button.dribbble .fa {
  color: #F26798;
}
.social-button.skype:before {
  background-color: #00AFF0;
}
.social-button.skype .fa {
  color: #00AFF0;
}
.social-button:hover:before {
  top: -10%;
  left: -10%;
}
.social-button:hover .fa {
  color: #fff;
  transform: scale(1);
}
.social-button:focus {
  opacity: 0.85;
}