body {
  font-family: Arial, sans-serif;
  padding: 20px;
  background: #f4f9ff;
}

input, button {
  padding: 10px;
  margin: 5px 0;
  width: 350px;
}

button {
  background: #4CAF50;
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background: #45a049;
}

#output {
  margin-top: 20px;
  white-space: pre;
  font-family: monospace;
  background: #fff;
  padding: 10px;
  border: 1px solid #ccc;
  overflow-x: auto;
}