* {
  margin: 0;
  padding: 0;
  border: 0;
  overflow: hidden;
  width: 100%;
  height: 100%;
}

body {
  background: #000;
  font: 30px sans-serif;
}

#hint {
  position: fixed;
  top: 8px;
  left: 8px;
  width: auto;
  height: auto;
  color: #0f0;
  background: rgba(0, 0, 0, 0.45);
  padding: 4px 8px;
  border-radius: 4px;
  font: 13px monospace;
  pointer-events: none;
}