body{
    background:url(../images/big/auth-bg3.jpg) no-repeat center center; 
    background-size: cover;
} 

.main-wrapper{
    background-color: #000000b5;
}

.form-group label.error{
    font-size: smaller;color: red;
}

.input-group label.error{
    position: absolute;
    font-size: smaller;
    color: red;
    margin-top: 42px;
}