.embed-responsive-24by19::before{aspect-ratio:24/19}.embed-responsive-24by22::before{aspect-ratio:24/22}.embed-responsive-24by23::before{aspect-ratio:24/23}.embed-responsive-3by2::before{aspect-ratio:3/2}.embed-responsive-4by3::before{aspect-ratio:4/3}.embed-responsive-48by37::before{aspect-ratio:48/37}