.embed-responsive-1by1::before{aspect-ratio:1/1}.embed-responsive-16by9::before{aspect-ratio:16/9}.embed-responsive-22by24::before{aspect-ratio:22/24}.embed-responsive-24by17::before{aspect-ratio:24/17}.embed-responsive-3by4::before{aspect-ratio:3/4}.embed-responsive-4by3::before{aspect-ratio:4/3}.embed-responsive-48by35::before{aspect-ratio:48/35}.embed-responsive-48by37::before{aspect-ratio:48/37}