@media (max-width: 640px) {
  .clef {
    display: none;
  }
}

@media (max-width: 480px) {
  nav {
    position: fixed; top: 16px; right: 16px; left: 16px; z-index: 8;
  }

  nav li:not(.active) {
    display: none;
  }

  nav.touched li {
    display: block;
  }

  nav:not(.touched) li.active {
    margin-bottom: 0;
  }

  nav:before {
    content: "Tap to change page \25BE";
    display: block;
    margin: 0 auto;
    padding: 4px;
    width: 80%;
    color: #C8C8C8;
    font-size: 11px;
    text-align: center;
    text-transform: uppercase;
    background-color: #383838;
    border-radius: 8px 8px 0 0;
  }

  nav.touched::before {
    content: "Tap to close navigation \25B4";
  }

  nav ul {
    min-height: 40px;
  }

  body > header,
  body > aside *,
  main,
  footer {
    min-width: 320px;
  }

  body > header {
    margin-top: 72px;
  }

  body > header h1 {
    margin-bottom: 0;
  }

  body > header h2 {
    margin-top: 0;
  }

  body > aside h3 {
    padding: 16px;
    font-size: 20px;
  }

  main > aside {
    padding-right: 0;
  }

  aside figure {
    display: none;
  }

  aside blockquote {
    display: none;
  }

  footer ul,
  footer ul li {
    display: block;
    width: auto;
    text-align: center;
  }

  footer ul li:last-child {
    width: auto;
    text-align: center;
  }
}