.login-contenedor {
    position: relative;
    width: 720px;
    height: 420px;
}

.login-imagen {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.login-formulario {
    position: absolute;
    top: 210px; /* ajusta a gusto */
    left: 330px; /* ajusta a gusto */
    width: 300px;
}