* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  }
  
  .wrap .btn {
  display: inline-block;
  height: 70px;
  width: 70px;
  margin: 0 25px;
  text-align: center;
  border-radius: 50px;
  overflow: hidden;
  float: left;
  box-shadow: -7px -7px 20px 0 rgba(255, 255, 255, 0.9),
  7px 7px 20px 0 rgba(0, 0, 0, 0.3);
  transition: all 0.4s ease-out;
  cursor: pointer;
  }
  .btn .icon {
  display: inline-block;
  height: 70px;
  width: 70px;
  background: #333;
  border-radius: 50px;
  float: left;
  box-shadow: inset -7px -7px 20px 0;
  }
  .btn span {
  font-size: 24px;
  font-weight: 600px;
  line-height: 70px;
  }
  .btn .icon i {
  font-size: 30px;
  line-height: 70px;
  color: #fff;
  transition: all 0.4s ease-out;
  }
  .btn:hover {
  width: 220px;
  transition: all 0.4s ease-out;
  }
  .btn:first-child:hover .icon {
  background: #3b5998;
  box-shadow: inset 1px 0 20px 0;
  }
  .btn:nth-child(2):hover .icon {
  background: #dd2a7b;
  box-shadow: inset 1px 0 20px 0;
  }
  .btn:nth-child(3):hover .icon {
  background: #00acee;
  box-shadow: inset 1px 0 20px 0;
  }
  .btn:last-child:hover .icon {
  background: #0e76a8;
  box-shadow: inset 1px 0 20px 0;
  }
  .btn:first-child:hover {
  color: #3b5998;
  }
  .btn:nth-child(2):hover {
  color: #dd2a7b;
  }
  .btn:nth-child(3):hover {
  color: #00acee;
  }
  .btn:last-child:hover {
  color: #0e76a8;
  }