.embed-responsive-1by1::before{aspect-ratio:1/1}.embed-responsive-16by9::before{aspect-ratio:16/9}.embed-responsive-24by19::before{aspect-ratio:24/19}.embed-responsive-24by23::before{aspect-ratio:24/23}.embed-responsive-31by48::before{aspect-ratio:31/48}.embed-responsive-4by3::before{aspect-ratio:4/3}.embed-responsive-48by41::before{aspect-ratio:48/41}.embed-responsive-48by43::before{aspect-ratio:48/43}