section#controls-menu header {
  position: fixed;
  top: 240px;
  left: -60px;
  transform: rotate(90deg);
  text-transform: uppercase;
}
section#controls-menu header a {
  text-decoration: none;
  background-color: #e6e6e6;
  padding: 10px 15px;
  border-top-left-radius: 15px;
  border-top-right-radius: 15px;
}
section#controls-menu div#button-controls {
  width: 240px;
  height: 360px;
  background-color: #e6e6e6;
  position: fixed;
  top: 20px;
  left: -240px;
}
section#controls-menu div#button-controls.hidden {
  display: none;
}