.embed-responsive-15by16::before{aspect-ratio:15/16}.embed-responsive-16by5::before{aspect-ratio:16/5}.embed-responsive-16by9::before{aspect-ratio:16/9}.embed-responsive-17by24::before{aspect-ratio:17/24}.embed-responsive-24by11::before{aspect-ratio:24/11}.embed-responsive-24by7::before{aspect-ratio:24/7}.embed-responsive-3by1::before{aspect-ratio:3/1}.embed-responsive-3by2::before{aspect-ratio:3/2}.embed-responsive-31by48::before{aspect-ratio:31/48}.embed-responsive-37by48::before{aspect-ratio:37/48}.embed-responsive-4by3::before{aspect-ratio:4/3}.embed-responsive-48by19::before{aspect-ratio:48/19}.embed-responsive-48by37::before{aspect-ratio:48/37}