.mobile {
  display: none;
  position: fixed;
  width: 100%;
  top: 0;
}
.mobile div {
  display: none;
}
.mobile button {
  position: absolute;
  top: 15px;
  right: 15px;
  border: 0;
  text-indent: 200%;
  overflow: hidden;
  background:url("http://i.imgur.com/vKRaKDX.png") center no-repeat;
  background-size: 80%;
  width: 30px;
  height: 30px;

}
.mobile button.expanded {
  -webkit-transform: rotate(90deg);
          transform: rotate(90deg);
}
.mobile a { background-color: rgba(0, 0, 0, 0.5);
  display: block;
}

article {
  padding: 0 30px 15px;
}
@media (max-width: 950px) {
  .mobile {
    display: block;
  }
  .desktop {
    display: none;
  }
}