.snowflake {
    position: fixed;
    top: -10px;
    z-index: 9999;
    user-select: none;
    cursor: default;
    animation-name: fall;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    pointer-events: none;
    color: #FFF;
    font-size: 1em;
}

@keyframes fall {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(100vh);
    }
}