.snowflakes {
  display: block;
  position: fixed;
  overflow: hidden;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
}

.snowflake {
  position: fixed;
  z-index: 15;
  top: -10%;
  font-size: 1em;
  color: #fff;
  font-family: Arial, sans-serif;
  text-shadow: 0 0 5px #000;
  user-select: none;
  -webkit-user-select: none;
  cursor: default;
  -webkit-animation-name: heart-fall, heart-shake;
  -webkit-animation-duration: 12s, 3s;
  -webkit-animation-timing-function: linear, ease-in-out;
  -webkit-animation-iteration-count: infinite, infinite;
  animation-name: snowflakes-fall, snowflakes-shake;
  animation-duration: 12s, 3s;
  animation-timing-function: linear, ease-in-out;
  animation-iteration-count: infinite, infinite;
}

@-webkit-keyframes snowflakes-fall {
  0% {
    top: -10%;
  }

  100% {
    top: 100%;
  }
}

@-webkit-keyframes snowflakes-shake {

  0%,
  100% {
    -webkit-transform: translateX(0);
    transform: translateX(0);
  }

  50% {
    -webkit-transform: translateX(80px);
    transform: translateX(80px);
  }
}

@keyframes snowflakes-fall {
  0% {
    top: -10%;
  }

  100% {
    top: 100%;
  }
}

@keyframes snowflakes-shake {

  0%,
  100% {
    transform: translateX(0);
  }

  50% {
    transform: translateX(80px);
  }
}

.snowflake:nth-of-type(0) {
  left: 0%;
  animation-delay: 0s, 0s;
}

.snowflake:nth-of-type(1) {
  left: 10%;
  animation-delay: 1s, 1s;
}

.snowflake:nth-of-type(2) {
  left: 20%;
  animation-delay: 6s, 0.5s;
}

.snowflake:nth-of-type(3) {
  left: 30%;
  animation-delay: 4s, 2s;
}

.snowflake:nth-of-type(4) {
  left: 40%;
  animation-delay: 2s, 2s;
}

.snowflake:nth-of-type(5) {
  left: 50%;
  animation-delay: 8s, 3s;
}

.snowflake:nth-of-type(6) {
  left: 60%;
  animation-delay: 6s, 2s;
}

.snowflake:nth-of-type(7) {
  left: 70%;
  animation-delay: 2.5s, 1s;
}

.snowflake:nth-of-type(8) {
  left: 80%;
  animation-delay: 1s, 0s;
}

.snowflake:nth-of-type(9) {
  left: 90%;
  animation-delay: 3s, 1.5s;
}

.snowflake:nth-of-type(10) {
  left: 25%;
  animation-delay: 2s, 0s;
}

.snowflake:nth-of-type(11) {
  left: 65%;
  animation-delay: 4s, 2.5s;
}