#aviso-movil-horizontal {
    display: none;
}

@media only screen and (orientation:portrait) {
    #wrapper {
        display: none;
    }

    #aviso-movil-horizontal {
        display: block;
        background-color: yellow;
        display: flex;
        justify-content: center;
    }
}

@media only screen and (orientation:landscape) {
    #aviso-movil-horizontal {
        display: none;
    }
}