.youtube {
  width: 100%;
  height: auto;
  aspect-ratio: 16/9;
  max-height: 480px;
  max-width: 854px;
}

a[href="https://www.free-counters.org/"] {
  visibility: hidden;
}

.md-container {
  background-image: url('/img/machanism-background.png'); 
  background-size: 100%;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-position: center top;
}