@charset "UTF-8";
@import url(https://fonts.googleapis.com/css?family=Open+Sans:400,600);

.example-button {
  display: inline-block;
  width: 240px;
  height: 60px;
  font-size: 18px;
  font-family: 'Open Sans', sans-serif;
  font-weight: 400;
  text-align: center;
  text-decoration: none;
  line-height: 54px;
  outline: none;
}
.example-button::before,
.example-button::after {
  position: absolute;
  z-index: -1;
  display: block;
  content: '';
}
.example-button,
.example-button::before,
.example-button::after {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  -webkit-transition: all .3s;
  transition: all .3s;
}

.example-button15 {
  position: relative;
  -webkit-perspective: 300px;
  perspective: 300px;
}
.example-button15 span {
  display: block;
  position: absolute;
  width: 240px;
  height: 60px;
  font-size: 18px;
  font-family: 'Open Sans', sans-serif;
  font-weight: 400;
  text-align: center;
  line-height: 56px;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  -webkit-transition: all .3s;
  transition: all .3s;
  pointer-events: none;
}
.example-button15 span:nth-child(1) {
  background-color: #0091d7;
  color: #fff;
  -webkit-transform: rotateX(90deg);
  -moz-transform: rotateX(90deg);
  transform: rotateX(90deg);
  -webkit-transform-origin: 50% 50% -30px;
  -moz-transform-origin: 50% 50% -30px;
  transform-origin: 50% 50% -30px;
}
.example-button15 span:nth-child(2) {
  background-color: #0091d7;
  color: #fff;
  -webkit-transform: rotateX(0deg);
  -moz-transform: rotateX(0deg);
  transform: rotateX(0deg);
  -webkit-transform-origin: 50% 50% -30px;
  -moz-transform-origin: 50% 50% -30px;
  transform-origin: 50% 50% -30px;
}
.example-button15:hover span:nth-child(1) {
  -webkit-transform: rotateX(0deg);
  -moz-transform: rotateX(0deg);
  transform: rotateX(0deg);
}
.example-button15:hover span:nth-child(2) {
  background-color: #0091d7;
  color: #0091d7;
  -webkit-transform: rotateX(-90deg);
  -moz-transform: rotateX(-90deg);
  transform: rotateX(-90deg);
}