@media (max-width: 479px) {
    body {
        width:100%;
        height:100%;
    }
    
    .ondamex.mobile{
        max-width: 479px;
        margin-left: auto; 
        margin-right: auto;
    }
    
    .ondamex.mobile .container{
        display:block;
        padding-right: 15px;
        padding-left: 15px;
        margin-right: 0;
        margin-left: 0;
        width: 100%;
        height: 100%;
    }

    .ondamex.mobile .navigation nav .dropdown{
        display: block;
    }

    .ondamex.mobile .navigation nav .dropbtn {
        display: block;
    }

    .ondamex.mobile .navigation nav .dropdown-content {
        display: none;
        position: relative;
        background-color: #202020;
        z-index: 1;
    }

    .ondamex.mobile .navigation nav ul li {
        display: block;
    }

    .ondamex.mobile .navigation nav ul ul {
        position: static;
        background-color: #202020;
    }

    .ondamex.mobile .container .text_contenido .contenedor_grid {
        grid-template-columns: repeat(4, 1fr);
    }
}