body {
  background: #111;
  color: white;
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  text-align: center;
}

#menu, #waiting, #gameUI {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
}

h1, h2, h3 {
  margin-bottom: 20px;
}

input {
  padding: 10px;
  font-size: 16px;
  width: 240px;
  margin-bottom: 10px;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  margin-bottom: 10px;
  cursor: pointer;
  border-radius: 8px;
  background: #444;
  color: white;
  border: none;
}

button:hover {
  background: #666;
}

canvas {
  border: 2px solid white;
  margin-top: 10px;
  background: #222;
  max-width: 100%;
}

#error {
  color: red;
  margin-top: 10px;
}

@media (max-width: 480px) {
  canvas {
    width: 100vw;
    height: auto;
  }
}