body {
  margin: 0;
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background-color: #1a1a1a;
  color: #fff;
}
#canvas {
  width: 100%;
  height: 60vh;
}
#controls {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}
button,
input {
  margin: 0.5rem;
  padding: 0.5rem;
  font-size: 1rem;
}