.snowflake {
    position: fixed;
    top: -10px;
    color: white;
    font-size: 1em;
    pointer-events: none;
    user-select: none;
    opacity: 0.9;
    animation-name: fall;
    animation-timing-function: linear;
}

@keyframes fall {
    0% {
        transform: translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh);
        opacity: 0.4;
    }
}