.ri-responsive {
    position: relative;
    width: 100%;
    height: 0;
    overflow: hidden;
}
.ri-responsive iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}
.ri-error {
    padding: 10px;
    border: 1px solid #f5c6cb;
    background: #f8d7da;
    color: #721c24;
}