body {
  margin: 0;
  overflow: hidden;
  font-family: sans-serif;
  background: #202020;
  color: white;
  height: 100vh;
}

canvas {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
  display: block;
}

#toolbar {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 5;
}

#toolbar button {
  margin-right: 10px;
  padding: 5px 10px;
  font-size: 14px;
}

#menu, #backgroundMenu {
  position: absolute;
  display: none;
  background: #fff;
  border: 1px solid #ccc;
  box-shadow: 2px 2px 6px rgba(0, 0, 0, 0.2);
  z-index: 10;
  color: black;
}

#menu button, #backgroundMenu button {
  display: block;
  width: 100%;
  padding: 5px 10px;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
}

#menu button:hover, #backgroundMenu button:hover {
  background-color: #f0f0f0;
}