.embed-responsive-1by1{aspect-ratio:1/1}.embed-responsive-1by1::before{padding-top:100.00%}.embed-responsive-15by16{aspect-ratio:15/16}.embed-responsive-15by16::before{padding-top:106.67%}.embed-responsive-24by20{aspect-ratio:24/20}.embed-responsive-24by20::before{padding-top:83.33%}