body {
    overflow: hidden;
    margin: 0;
}

.snowflakes {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
}

.snowflake {
    position: absolute;
    color: #fff;
    width: 10px;
    height: 10px;
    background-color: #fff;
    border-radius: 50%;
    opacity: 0;
    animation: fall linear infinite;
}

@keyframes fall {
    0% {
        transform: translateY(-90vh);
        opacity: 1;
    }
    100% {
        transform: translateY(90vh);
        opacity: 1;
    }
}