.fondo-aviso-cookies {
    display: none;
    background: #FFFFFF;
    position: fixed;
    z-index: 99;
    width: 100vw;
    height: 100vh;
    top: 0;
    left: 0;
}
.fondo-aviso-cookies.activo {
    display: block;
    background: #FFFFFF;
}