.animate-enter, 
.animate-leave
{ 
  -webkit-transition: 400ms cubic-bezier(0.250, 0.250, 0.750, 0.750) all;
  -moz-transition: 400ms cubic-bezier(0.250, 0.250, 0.750, 0.750) all;
  -ms-transition: 400ms cubic-bezier(0.250, 0.250, 0.750, 0.750) all;
  -o-transition: 400ms cubic-bezier(0.250, 0.250, 0.750, 0.750) all;
  transition: 400ms cubic-bezier(0.250, 0.250, 0.750, 0.750) all;
  position: relative;
  display: block;
} 
 
.animate-enter.animate-enter-active, 
.animate-leave {
  opacity: 1;
  top: 0;
  height: 30px;
}
 
.animate-leave.animate-leave-active,
.animate-enter {
  opacity: 0;
  top: -50px;
  height: 0px;
}