body {
    margin: 0;
    overflow: hidden;
}

#snowfall {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.snowflake {
    position: absolute;
    width: 5px;
    height: 5px;
    background-color: #fff;
    border-radius: 50%;
    animation: fall linear infinite;
}

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