body { font-family: Arial, sans-serif; padding: 20px; }
textarea { width: 100%; height: 200px; font-family: monospace; font-size: 14px; padding: 10px; }
#output { margin-top: 20px; height: 200px; background: #f7f7f7; }
label { font-weight: bold; display: block; margin-bottom: 5px; }