.observe {
  opacity: 0;
  -webkit-transform: translateY(50px);
  transform: translateY(50px);
  transition: opacity .6s ease-in-out, -webkit-transform 1.5s ease-in-out;
  transition: opacity .6s ease-in-out, transform 1.5s ease-in-out;
  transition: opacity .6s ease-in-out, transform 1.5s ease-in-out, -webkit-transform 1.5s ease-in-out;
  transition: opacity .6s ease-in-out, transform 1.5s ease-in-out, -webkit-transform 1s ease-in-out;
}

.show {
  opacity: 1;
  -webkit-transform: translateY(0);
  transform: translateY(0);
}