.embed-responsive-16by5::before{aspect-ratio:16/5}.embed-responsive-24by13::before{aspect-ratio:24/13}.embed-responsive-24by5::before{aspect-ratio:24/5}.embed-responsive-4by3::before{aspect-ratio:4/3}.embed-responsive-48by31::before{aspect-ratio:48/31}.embed-responsive-8by3::before{aspect-ratio:8/3}.embed-responsive-8by5::before{aspect-ratio:8/5}