body {
  margin: 0;
  background: #0b0b0f;
  color: white;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  font-family: sans-serif;
}

button {
  padding: 12px 20px;
  font-size: 16px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background: #4f46e5;
  color: white;
  margin-bottom: 20px;
}

canvas {
  width: 80vw;
  height: 60vh;
  background: #111;
  border-radius: 12px;
}