div.paralax-visa.blurest {filter: blur(10px);}
div.paralax-visa.norm.blurest {filter:grayscale(0)  blur(10px);}
div.paralax-visa.nigth25.blurest {filter:brightness(85%)grayscale(0.25) blur(10px);}
div.paralax-visa.nigth50.blurest {filter:brightness(65%) grayscale(0.50) blur(10px);}
div.paralax-visa.nigth75.blurest {filter:brightness(45%) grayscale(0.75) blur(10px);}
div.paralax-visa.nigth.blurest {filter:brightness(25%) grayscale(1) blur(10px);}


/*
div#paralax-logo-visa {
    display: block;
    position: absolute;
    top: 10px;
    height: 60px;
    width: 160px;
    left: calc(50% - 80px);
    background: url("http://grodnovisafree.by/images/banners/logo_gvf_transp.png");
    filter: drop-shadow(0 0 0.75rem rgba(23,23,23,0.5));
    z-index: 1;
}
*/
.form-signin {
    z-index: 100;
}