video {
  width: 100%;
  aspect-ratio: 1 / 1;
}

canvas {
  /* We don't want to show the frames that we are scanning for QR codes. It's
   * nicer to just see the video stream. */
  display: none;
}

ul {
  margin: 0px;
}

li > a.active {
  /* Set the scanned QR codes to a green color. */
  background-color: #198754;
  border-color: #005700;
}