#fab {
  z-index: 9999;
  position: fixed;
  bottom: 20px;
  left: 20px;
}

@media only screen and (max-width: 640px) {
  #fab {
    left: 10px;
    bottom: 10px;
  }
}

#fab > .item {
  cursor: pointer;
  user-select: none;
  color: #ffffff;
  background-color: #e13d55;
  border-radius: 34px;
  transition: all 0.25s linear;
}
#fab > .center {
  padding: 10px 20px;
}

#fab > .item:hover {
  background-color: #f05b71;
}

#fab > .item > a {
  color: #ffffff;
}
#fab > .item > img {
  float: left;
  height: 20px;
  margin-right: 20px;
}