.button {
  display: inline-block;
  width: auto;
  height: auto;
  padding: 6px 20px 6px 20px;
  text-align: center;
  text-decoration: none;
  line-height: 54px;
  outline: none;
}
.button::before,
.button::after {
  position: absolute;
  z-index: -1;
  display: block;
  content: '';
}
.button,
.button::before,
.button::after {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  -webkit-transition: all .3s;
  transition: all .3s;
}


.button {
  position: relative;
  z-index: 1;
  background-color: #b99d40;
  border: 2px solid #b99d40;
  color: #fff;
  line-height: 50px;
}
.button:hover {
  background-color: #fff;
  border-color: #b99d40;
  color: #b99d40;
}
.button::before,
.button::after {
  top: 0;
  width: 50%;
  height: 100%;
  background-color: #b99d40;
}
.button::before {
  right: 0;
}
.button::after {
  left: 0;
}
.button:hover::before,
.button:hover::after {
  width: 0;
  background-color: #b99d40;
}