.winter-is-coming, .snow {
  z-index: 1;
  pointer-events: none;
}

.winter-is-coming {
  overflow: hidden;
  position: absolute;
  top: 0;
  height: 99%;
  width: 99%;
  max-width: 100%;
}

.snow {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  -webkit-animation: falling linear infinite both;
          animation: falling linear infinite both;
  -webkit-transform: translate3D(0, -100%, 0);
          transform: translate3D(0, -100%, 0);
}
.snow--near {
  -webkit-animation-duration: 5s;
          animation-duration: 5s;
  background-image: url("snow1.png");
  background-size: contain;
}
.snow--near + .snow--alt {
  -webkit-animation-delay: 2.5s;
          animation-delay: 2.5s;
}
.snow--mid {
  -webkit-animation-duration: 10s;
          animation-duration: 10s;
  background-image: url("snow2.png");
  background-size: contain;
}
.snow--mid + .snow--alt {
  -webkit-animation-delay: 5s;
          animation-delay: 5s;
}
.snow--far {
  -webkit-animation-duration: 15s;
          animation-duration: 15s;
  background-image: url("snow3.png");
  background-size: contain;
}
.snow--far + .snow--alt {
  -webkit-animation-delay: 15s;
          animation-delay: 15s;
}

@-webkit-keyframes falling {
  0% {
    -webkit-transform: translate3D(-7.5%, -100%, 0);
            transform: translate3D(-7.5%, -100%, 0);
  }
  100% {
    -webkit-transform: translate3D(7.5%, 100%, 0);
            transform: translate3D(7.5%, 100%, 0);
  }
}

@keyframes falling {
  0% {
    -webkit-transform: translate3D(-7.5%, -100%, 0);
            transform: translate3D(-7.5%, -100%, 0);
  }
  100% {
    -webkit-transform: translate3D(7.5%, 100%, 0);
            transform: translate3D(7.5%, 100%, 0);
  }
}