.embed-responsive-13by16::before{aspect-ratio:13/16}.embed-responsive-24by23::before{aspect-ratio:24/23}.embed-responsive-24by7::before{aspect-ratio:24/7}.embed-responsive-4by1::before{aspect-ratio:4/1}.embed-responsive-4by3::before{aspect-ratio:4/3}.embed-responsive-48by17::before{aspect-ratio:48/17}.embed-responsive-48by5::before{aspect-ratio:48/5}