.container-login100{
    width:100%;min-height:100vh;display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;flex-wrap:wrap;justify-content:center;align-items:center;padding:15px;background-repeat:no-repeat;background-position:center;background-size:cover;position:relative;z-index:1
}
.container-login100::before{content:"";display:block;position:absolute;z-index:-1;width:100%;height:100%;top:0;left:0;background-color:rgba(0,0,0,
           0)}