#piano-pg .animate-elem {
  opacity: 0;
  position: relative;
}

#piano-pg .animate-elem.in-view {
  opacity: 1;
  -moz-transition: all 500ms linear;
  -webkit-transition: all 500ms linear;
  -o-transition: all 500ms linear;
  transition: all 500ms linear;
}

#piano-pg .animate-elem.slide-left {
  -moz-transform: translate3d(-10px, 0px, 0px);
  -webkit-transform: translate3d(-10px, 0px, 0px);
  -o-transform: translate(-10px, 0px);
  -ms-transform: translate(-10px, 0px);
  transform: translate3d(-10px, 0px, 0px);
}

#piano-pg .animate-elem.slide-left.in-view {
  -moz-transform: translate3d(0px, 0px, 0px);
  -webkit-transform: translate3d(0px, 0px, 0px);
  -o-transform: translate(0px, 0px);
  -ms-transform: translate(0px, 0px);
  transform: translate3d(0px, 0px, 0px);
}