#login_cover{
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 3;
}

#howtouse_cover{
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 3;
}

#white_login_screen{
    position: absolute;
    background: #FFF;
    opacity: 0.4;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 2;
}

.login_box{
    padding: 10px;
    border: solid black;
    border-width: 1px;
    margin: 1px;
    background: #DEDECE;
    text-align: left;
    display: inline-block;
    opacity: 1;
    z-index: 4;
}