body {
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #f0f0f0;
  margin: 0;
}

.container {
  text-align: center;
}

input {
  padding: 8px;
  width: 240px;
  font-size: 16px;
  text-transform: uppercase;
}

button {
  padding: 8px 14px;
  margin: 6px;
  font-size: 15px;
  cursor: pointer;
  border: none;
  border-radius: 6px;
  background-color: #222;
  color: white;
  transition: background 0.2s ease;
}

button:hover {
  background-color: #444;
}

canvas {
  display: block;
  margin: 20px auto;
  border: 1px solid #ccc;
  max-width: 100%;
}