#bdb-iframe-wrapper {
  width: 0;
  height: 0;
  margin: 0 auto;
  background-color: #fff;
  color: #aaa;
  transition: 0.2s;
}
@media (min-width: 950px) {
  #bdb-iframe-wrapper {
    position: fixed;
    bottom: 20px;
    right: 0;
    box-shadow: 0 0 5px 0 rgba(0, 0, 0, 0.5);
  }
}
#bdb-iframe {
  width: 100%;
  height: 100%;
  padding: 0;
  border: none;
  margin: 0;
}