.snowflake {
    position: fixed;
    top: -50px;
    z-index: 9999;
    user-select: none;
    pointer-events: none;
    color: #fff;
    font-family: Arial, sans-serif;
    animation: fall linear infinite;
}

@keyframes fall {
    0% {
        transform: translateY(0) translateX(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(110vh) translateX(var(--drift)) rotate(360deg);
        opacity: 0.5;
    }
}