.content-header {
  position: fixed;
  width: 17em;
  height: 3em;
  top: 0;
  z-index: 99;
  left: -17em;
  padding: 3em 0 0 0;
  transition: all 0.3s ease;
  -webkit-transition: all 0.3s ease;
  background-color: #2D333A;
}
.nav-toggle-button {
  font-size: 3em;
  position: absolute;
  top: -1em;
  z-index: 999 !important;
  outline: none;
  cursor: pointer;
  color: #000;
  font-style: normal;
  font-weight: normal;
  speak: none;
  display: inline-block;
  text-decoration: inherit;
  text-align: center;
  font-variant: normal;
  text-transform: none;
  line-height: 1em;
  width: 1em;
  margin-right: 0.3em;
  font-family: "petermolnar";
  text-shadow: 2px 2px #c8c8c8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
#showContentHeader:checked ~ #main-header {
  left: 0;
  padding: 3em 0 0 0;
  width: 17em;
  height: 100%;
  box-shadow: 0 0 2.8em #333;
}

@media (min-width: 960px) and (orientation: landscape) and (-webkit-max-device-pixel-ratio: 1.5),(min-width: 960px) and (orientation: landscape) and (max-resolution: 220dpi),(min-width: 2400px) and (orientation: landscape) and (-webkit-max-device-pixel-ratio: 1.9),(min-width: 2400px) and (orientation: landscape) and (max-resolution: 290dpi) {
  .nav-toggle-button {
    display: none;
    visibility: hidden;
  }
  .content-header {
    left: 0;
    width: 12em;
    height: 100%;
    padding: 0;
  }
}