body {
  margin: 0;
  background: #111;
  overflow: hidden;
  font-family: sans-serif;
}

#info {
  position: absolute;
  top: 10px;
  left: 10px;
  color: white;
  z-index: 1;
}

#tooltip {
  position: absolute;
  background: rgba(0, 0, 0, 0.75);
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  pointer-events: none;
  font-size: 12px;
  display: none;
}

#sound-toggle {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 1;
  padding: 6px 10px;
  font-size: 14px;
  background: #222;
  color: white;
  border: 1px solid #444;
  border-radius: 4px;
  cursor: pointer;
}