qr-reader {
  background: black;
  display: block;
  position: relative;
}
qr-reader video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: relative;
  transform: none!important;
}
qr-reader .controls {
  position: absolute;
  top: 5px;
  right: 5px;
  text-align: right;
}
qr-reader .controls i {
  background: white;
  padding: 5px;
  border-radius: 5px;
  width: 20px;
  text-align: center;
  margin-left: 5px;
}