grav-ouidade.com/user/plugins/login/css/login.css

#grav-login {
    max-width: 30rem;
    margin: 5rem auto;
    background: #fcfcfc;
    border: 4px solid #eee;
    border-radius: 4px;
    padding: 1rem 3rem 3rem 3rem;
    text-align: center;
}

#grav-login .form-actions {
    text-align: center;
}

#grav-logout {
    position: absolute;
    bottom: 5px;
    right: 5px;
}

.alert.info {
    color: #c00;
}