.video-wrapper {
  max-width: 800px;   /* cap how large it gets; remove for full content width */
  margin: 1em auto;
}

.video-wrapper iframe {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  border: 0;
}

.md-nav__sidebar-image {
  padding: 0.5rem 0.6rem;
  text-align: center;
}
.md-nav__sidebar-image img {
  max-width: 50%;
  height: auto;
}

.md-nav--primary > .md-nav__title {
  box-shadow: none;
}