button {
  margin: 20px;
}

.custom-btn {
  width: 200px;
  height: 50px;
  color: #fff;
  border-radius: 5px;
  padding: 10px 25px;
  font-family: 'Lato', sans-serif;
  font-weight: 500;
  background: transparent;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  display: inline-block;
  box-shadow: inset 2px 2px 2px 0px rgba(255, 255, 255, .5),
    7px 7px 20px 0px rgba(0, 0, 0, .1),
    4px 4px 5px 0px rgba(0, 0, 0, .1);
  outline: none;
}

.btn-6 {
  background: rgb(247, 150, 192);
  background: radial-gradient(circle, rgba(247, 150, 192, 1) 0%, rgba(118, 174, 241, 1) 100%);
  line-height: 42px;
  padding: 0;
  border: none;
}

.btn-6 span {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  font-size: 30px;
}

.btn-6:before,
.btn-6:after {
  position: absolute;
  content: "";
  height: 0%;
  width: 1px;
  box-shadow:
    -1px -1px 20px 0px rgba(255, 255, 255, 1),
    -4px -4px 5px 0px rgba(255, 255, 255, 1),
    7px 7px 20px 0px rgba(0, 0, 0, .4),
    4px 4px 5px 0px rgba(0, 0, 0, .3);
}

.btn-6:before {
  right: 0;
  top: 0;
  transition: all 500ms ease;
}

.btn-6:after {
  left: 0;
  bottom: 0;
  transition: all 500ms ease;
}

.btn-6:hover {
  color: #04182f;
  box-shadow: none;
}

.btn-6:hover:before {
  transition: all 500ms ease;
  height: 100%;
}

.btn-6:hover:after {
  transition: all 500ms ease;
  height: 100%;
}

.btn-6 span:before,
.btn-6 span:after {
  position: absolute;
  content: "";
  box-shadow:
    -1px -1px 20px 0px rgba(255, 255, 255, 1),
    -4px -4px 5px 0px rgba(255, 255, 255, 1),
    7px 7px 20px 0px rgba(0, 0, 0, .4),
    4px 4px 5px 0px rgba(0, 0, 0, .3);
}

.btn-6 span:before {
  left: 0;
  top: 0;
  width: 0%;
  height: .5px;
  transition: all 500ms ease;
}

.btn-6 span:after {
  right: 0;
  bottom: 0;
  width: 0%;
  height: .5px;
  transition: all 500ms ease;
}

.btn-6 span:hover:before {
  width: 100%;
}

.btn-6 span:hover:after {
  width: 100%;
}