/* Snow falling effect :start */
#snow {
    position: fixed;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 9999;
    opacity: 0.3;
}
#snow .flake {
    position: absolute;
    user-select: none;
    transition: opacity 0.8s ease;
}
/* Snow falling effect :end */