.embed-responsive {
  position: relative;
  display: block;
  width: 80%;
  padding: 0;
  overflow: hidden; 
  margin: 0 auto;
  /*border-radius: 20px;*/
  padding-top: 20px;
}
  .embed-responsive::before {
    display: block;
    content: ""; }
  .embed-responsive .embed-responsive-item,
  .embed-responsive iframe,
  .embed-responsive embed,
  .embed-responsive object,
  .embed-responsive video {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0; }

.embed-responsive-21by9::before {
  padding-top: 42.85714%; }

.embed-responsive-16by9::before {
  padding-top: 56.25%; }

.embed-responsive-4by3::before {
  padding-top: 75%; }

.embed-responsive-1by1::before {
  padding-top: 100%; }

.embed-responsive-0by0::before {
  padding-top: 65%; }