flapping button

button flaps rotate on :hover

by Dru Dro

HTML

<div class="button">Learn More</div>

CSS

*,
*:after,
*:before {
  transition: all .25s ease-in-out;
}

html,
body {
  font-family: Arial;
  font-size: 62.5%;
  width: 1200px;
}

.button {
  display: inline-block;
  position: relative;
  font-size: 1.6rem;
  font-weight: bold;
  padding: 12px 20px;
  background-color: #fff;
  border-radius: 2px;
  border: 2px solid #555;
  cursor: pointer;
  color: #555;
  z-index: 0;
  overflow: hidden
}

.button:hover {
  color: #fff;
}

.button:before,
.button:after {
  display: block;
  content: "";
  position: absolute;
  width: 100%;
  height: 300%;
  background: #333;
  top: -100%;
  z-index: -1;
}

.button:before {
  left: -100%;
}

.button:after {
  right: -100%;
}

.button:hover:before {
  left: -50%;
  top: -150%;
  transform: rotate(45deg);
}

.button:hover:after {
  right: -50%;
  top: -50%;
  transform: rotate(45deg);
}