html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
}
canvas {
  display: block;
}

#controls-menu {
  position: fixed;
  bottom: 15px;
  left: 15px;
  background: rgba(0, 0, 0, 0.7);
  color: #eee;
  font-family: monospace;
  font-size: 1rem;
  padding: 10px 15px;
  border-radius: 8px;
  max-width: 220px;
  line-height: 1.4em;
}

#controls-menu h4 {
  margin: 6px 0;
  font-size: 1.2rem;
  font-weight: bold;
  text-decoration: none;
}

#controls-menu ul {
  margin: 0;
  padding-left: 16px;
}

#controls-menu li {
  margin: 3px 0;
}