html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: black;
}

#output {
  position: absolute;
  top: 0.25cm;
  left: 0.5cm;
  font-size: 1cm;
  color: white;
  z-index: 20;
  white-space: nowrap;
}

#fullscreen-toggle {
  position: fixed;
  left: 0.5cm;
  bottom: 0.25cm;
  z-index: 10;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
}

#fullscreen-toggle img.on {
  width: 1.5cm;
  height: auto;
  opacity: 1;
  transition: opacity 1s;
  pointer-events: none;
  filter: drop-shadow(0 0 1mm black);
}

#fullscreen-toggle[aria-checked="true"] {
  pointer-events: none;
  cursor: default;
}

#fullscreen-toggle[aria-checked="true"] img.on {
  opacity: 0;
}

#progress {
  display: block;
  width: 50%;
  position: fixed;
  bottom: 50%;
  left: 25%;
}