body {
  font-family: "Segoe UI", sans-serif;
  background-color: #fafafa;
  padding: 20px;
}

textarea {
  width: 100%;
  font-family: monospace;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
}

button {
  margin-top: 5px;
  margin-right: 10px;
  padding: 8px 14px;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background-color: #45a049;
}

#viz {
  margin-top: 30px;
}

#controls {
  margin-top: 20px;
}