html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background-color: #121212;
  font-family: sans-serif;
}


canvas {
  width: 100%;
  height: 100%;
  margin: 0 auto;
  display: block;
}

#hint {
  position: absolute;
  top: 5px;
  left: 50%;
  transform: translateX(-50%);  
  padding: 0.5em;
  color: #cdcdcd;
  background-color: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 5px;
}

#hint span {
  color: #ffaa00;
  text-transform: uppercase;
}