*,*::after, *::before{
    margin: 0;
    padding: 0;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    
}

#cont_preloader{
    background: black;
    top: 0;
    height: 100%;
    width: 100%;
    position: fixed;
    -webkit-transition: all 1s ease;
    -o-transition: all 1s ease;
    transition: all 1s ease;
    z-index: 100000;
    
}

#carga{
    background: url("https://c.tenor.com/sYzedsyllJwAAAAC/rockout-guitar.gif") no-repeat center center;
    height: 100%;
    width: 100%;
    background-size: 30%;
}

@media (max-width: 900px) {

    #carga{
        background-size: 50%;
    }

}


@media (max-width: 600px) {

    #carga{
        background-size: 60%;
    }

}

@media (max-width: 350px) {

    #carga{
        background-size: 80%;
    }

}