button {
  background-color: #13aa52;
  border: 1px solid #13aa52;
  border-radius: 4px;
  box-shadow: rgba(0, 0, 0, .1) 0 2px 4px 0;
  box-sizing: border-box;
  color: #fff;
  cursor: pointer;
  font-family: Helvetica, sans-serif;
  font-size: 16px;
  font-weight: 400;
  outline: none;
  outline: 0;
  padding: 10px 25px;
  text-align: center;
  transform: translateY(0);
  transition: transform 150ms, box-shadow 150ms;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

button:hover {
  box-shadow: rgba(0, 0, 0, .15) 0 3px 9px 0;
  transform: translateY(-2px);
}

button:disabled {
  background-color: #747474;
  border: 1px solid #747474;
  border-radius: 4px;
  box-shadow: rgba(0, 0, 0, .1) 0 2px 4px 0;
  box-sizing: border-box;
  color: #fff;
  cursor: not-allowed;
  font-family: Helvetica, sans-serif;
  font-size: 16px;
  font-weight: 400;
  outline: none;
  outline: 0;
  padding: 10px 25px;
  text-align: center;
  transform: translateY(0);
  transition: transform 150ms, box-shadow 150ms;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

@media (min-width: 768px) {
  .button {
    padding: 10px 30px;
  }
}