.embed-responsive {
    position: relative;
    display: block;
    width: 100%;
    padding: 0;
    overflow: hidden;
}
.embed-responsive .embed-responsive-item, .embed-responsive embed, .embed-responsive iframe, .embed-responsive object, .embed-responsive video {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}
.bd-example {
    position: relative;
    padding: 1rem;
    margin: 1rem -15px 0;
    border: solid #f8f9fa;
    border-width: .2rem 0 0;
}
.embed-responsive-16by9::before {
    padding-top: 56.25%;
}
.embed-responsive::before {
    display: block;
    content: "";
}