main{
    display: block;
}
.cell{
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 1rem;
}

.tall{
    aspect-ratio: 9 /16;
    height: 300px;;
}

.wide{
    aspect-ratio: 21 / 9;
    height: 300px;
}

iframe{
    width: 100%;
    height: 100%;
}



@media (max-width:950px) {
    .wide{
        width: 100%;
        height: 100%;
    }
    
}