.snowflake {
    position: fixed;
    top: -10px;
    z-index: 9999;
    user-select: none;
    cursor: default;
    animation-name: snowfall;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    color: #fff;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
    font-size: 1em;
    pointer-events: none;
}

@keyframes snowfall {
    0% {
        transform: translateY(-10px) translateX(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) translateX(var(--drift)) rotate(360deg);
        opacity: 0.8;
    }
}

@keyframes sway {
    0%, 100% {
        transform: translateX(0);
    }
    50% {
        transform: translateX(var(--sway-distance));
    }
}