body {
    background-color: rgb(199, 199, 199);
}
header {background-color: aliceblue;
min-height: 3rem;}
nav { background-color: rgb(4, 138, 138);
    min-height: 2rem;
border-bottom: 0.1rem solid red;
margin: 1rem 0;}

.container {
    max-width: 64rem;
    margin: 0 auto;
}

article {
    min-height: 3rem;
    background-color: darkkhaki;
}
footer {
    background-color: rgb(53, 52, 52);
    min-height: 2rem;
}

section {
    display: grid;
    /*repetir automaticamente tamaño minimo 18rem y maximo 1fraccion, que seria el 100% */
    grid-template-columns:  repeat(auto-fit, minmax(18rem, 1fr));
    grid-gap: 1rem;
    justify-content: space-between;
}
article {  
    min-height: 4rem;
    width: 100%;
    
}
article img {
    width: 100%;
}

.logo {
    display: none;
}
.iso img{
    margin: auto;
    padding: 1rem;
    width: 3rem;
    display: block;
}


iframe {
    border-radius: 1rem;
    width: 100%;
    height: 50rem;
}



/* version desktop */
@media screen and (min-width:40rem) {
    .logo {
        margin: 1rem ;
        width: 22rem;
        display: block;
    }
    .iso {
        display: none;
    }

    
    iframe {
        border-radius: 1rem;
        width: 100%;
        height: 20rem;
    }
}