header{
    text-align: center;
}
.caja 
{
    background-color: white;
    padding: 20px;
    border-radius: 10px;    
    box-shadow: 0px 3px 8px #999;
}
.contenedor {
    width: 85%;
    margin: 30px auto;
    display: grid;
    grid-template-columns: 1fr 1fr; 
    gap: 20px;
}
.caja h2 {
    color: #625000;
    border-bottom: 2px solid #ddd;
    padding-bottom: 8px;
}
.multimedia {
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 3px 8px #999;

    grid-column: 1 / 3;

    width: 80%;
    justify-self: center;

    text-align: center;
}