.signup img {
    width: 90%;
    padding-left: 30px;
    padding-right: 30px;
    margin-bottom: 40px;
    margin-left: auto;
    margin-right: auto;
    display: block;
}

.signup img.half {
    width: 40%;
}

.publicbg
{
    background: url('../public/img/bg-login.jpg');
}