.button {
  padding: 1.1rem 2.2rem;
  font-size: 1rem;
  color: #fff;
  font-weight: 600;
  transition: all .2s;
  position: relative;
  border: none;
  background: #000;
}

.button:before,.button:after {
  content: "";
  position: absolute;
  top: 50%;
  background: #ff3d00;
  height: 108%;
  width: 0;
  z-index: -1;
  transition: all .7s;
  transform: translateY(-50%);
}

.button:before {
  left: 0%;
}

.button:after {
  right: 0%;
}

.button:hover {
  color: #fff;
  box-shadow: #f51a1a7f 0 30px 60px -12px inset, #ff00007f 0 18px 36px -18px inset;
  z-index: 2;
}

.button:hover::before {
  width: 50%;
  left: 50%;
}

.button:hover::after {
  width: 50%;
  right: 50%;
}