.button-s1 {
  height: 64px;
  text-align: center;
}
.button-s1 div {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translate(-50%, 0);
  padding: 12px 24px;
  background: #f24536;
  border-radius: 8px;
  box-shadow: 0 0 4px -1px #000000;
  border-bottom: 4px solid #c01304;
  font-size: 18px;
  color: rgba(255, 255, 255, 0.9);
  text-shadow: -1px -1px #c01304;
  transition-duration: 0.1s;
}
.button-s1 div:hover {
  margin-top: -2px;
  border-bottom: 6px solid #c01304;
  color: rgba(255, 255, 255, 0.8);
}
.button-s1 div:active {
  margin-top: 2px;
  left: 50%;
  box-shadow: 0 0 3px -1px #000000;
  border-bottom: 2px solid #c01304;
  color: #ffffff;
  border-radius: 5px;
}