body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  background-color: #f5f5f5;
}

h1 {
  color: #333;
  text-align: center;
}

div {
  text-align: center;
  margin: 20px 0;
}

button {
  background-color: #007bff;
  color: white;
  border: none;
  padding: 10px 20px;
  margin: 0 10px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
}

button:hover {
  background-color: #0056b3;
}

button:active {
  background-color: #004085;
}

#out {
  background-color: #fff;
  border: 1px solid #ddd;
  border-radius: 5px;
  padding: 15px;
  min-height: 200px;
  overflow-x: auto;
  font-family: 'Courier New', monospace;
  font-size: 14px;
  white-space: pre-wrap;
  word-wrap: break-word;
}