.fullscreen_bg {
    filter: blur(2px);
    opacity: 0.9;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background-size: cover;
    background-position: 60% 60%;
    background-image: url('../Imagenes/FondoLogin.jpg');
    background-repeat: repeat;
}