.transition{
  transition: 0.6s;
  opacity: 1;
  position: relative;
  top: 0;
  left: 0;
}

/* In */
html.is-animating .transition{
  opacity: 0;
  top: -20px;
}

/* Out */
html.is-leaving .transition{
  opacity: 0;
  top: 70px;
}