.container_login {
    background-color: blue;
}

.cont_login {
    padding: 30px;
    max-width: 570px;
    min-width: 370px;
    margin: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
}