body { font-family: sans-serif; background: #f4f4f9; padding: 20px; }
.main-container { max-width: 800px; margin: 0 auto; }
textarea { width: 100%; height: 200px; margin-bottom: 10px; font-family: monospace; }
button { padding: 10px 20px; background: #007bff; color: white; border: none; cursor: pointer; }
button:hover { background: #0056b3; }