.estiloCarga {
    position: fixed;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
    z-index: 9999;
    background: url('../img/cargando.gif') 50% 50% no-repeat rgb(240,240,240);
    background-size: 10% auto;
    opacity: .9;
}