.cargando{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    z-index: 5;
    display: none;
    text-align: center;
}
.cargando.active{
    display: flex;
}