#btn-fotos {
    position: absolute;
    top: 0;
    left: 0;
    height: auto;
    margin: 184% 20%;
    width: 60%;
    /* pointer-events: none; */
    /* border:solid red 1px; */

}

@media screen and (min-width: 400px) {
    #btn-fotos {
        margin: 174% 20%;
       }
}


@media screen and (min-width: 520px) {
    #btn-fotos {
        margin: 140% 20%;
       }
}