.button_animation:before {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  content: '';
  z-index: 0;
  background: #222222;
  transform: scale(0, 1);
}

.button_animation:hover:before {
  -webkit-animation: hover-in 0.3s forwards alternate;
  animation: hover-in 0.3s forwards alternate;
}

.button_animation_orange:before {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  content: '';
  z-index: 0;
  background: #e37c23;
  transform: scale(0, 1);
}

.button_animation_orange:hover:before {
  -webkit-animation: hover-in 0.3s forwards alternate;
  animation: hover-in 0.3s forwards alternate;
}

@-webkit-keyframes hover-in {
  0% {
    transform-origin: left top;
    transform: scale(0, 1);
  }
  100% {
    transform-origin: left top;
    transform: scale(1, 1);
  }
}

@keyframes hover-in {
  0% {
    transform-origin: left top;
    transform: scale(0, 1);
  }
  100% {
    transform-origin: left top;
    transform: scale(1, 1);
  }
}

@-webkit-keyframes hover-out {
  0% {
    transform-origin: right top;
    transform: scale(1, 1);
  }
  100% {
    transform-origin: right top;
    transform: scale(0, 1);
  }
}

@keyframes hover-out {
  0% {
    transform-origin: right top;
    transform: scale(1, 1);
  }
  100% {
    transform-origin: right top;
    transform: scale(0, 1);
  }
}

.pop {
  opacity: 0;
  transform-origin: center bottom;
  transform: scale(0.8, 0.8);
}

.pop.show {
  -webkit-animation: pop 0.4s ease-out forwards;
  animation: pop 0.4s ease-out forwards;
}

.pop_delay {
  opacity: 0;
  transform-origin: center bottom;
  transform: scale(0.8, 0.8);
}

.pop_delay.show {
  -webkit-animation: pop 0.3s ease-out forwards;
  animation: pop 0.3s ease-out forwards;
}

@-webkit-keyframes pop {
  0% {
    opacity: 0;
    transform: scale(1, 1) translateY(10%);
  }
  100% {
    opacity: 1;
    transform: scale(1, 1) translateY(0);
  }
}

@keyframes pop {
  0% {
    opacity: 0;
    transform: scale(1, 1) translateY(10%);
  }
  100% {
    opacity: 1;
    transform: scale(1, 1) translateY(0);
  }
}