#snowContainer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
}

.snowflake {
    position: absolute;
    top: -10px;       /* start just above the viewport */
    color: #c5c5c5;
    font-size: 10px;
    opacity: 0.8;
    user-select: none;
    animation-name: fall;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
  }

  @keyframes fall {
    0% {
      transform: translate3d(0, -100%, 0);
      opacity: 0;
    }
    10% {
      opacity: 1;
    }
    100% {
      transform: translate3d(0, 110vh, 0); /* fall past the bottom */
      opacity: 0;
    }
  }