body { font-family: Arial; margin: 0; padding: 20px; background: #f5f5f5; }
main { background: white; padding: 30px; border-radius: 5px; max-width: 600px; margin: 0 auto; }
textarea { width: 100%; height: 150px; padding: 10px; border: 1px solid #ddd; }
.btn { padding: 10px 20px; background: #FF9800; color: white; border: none; border-radius: 4px; cursor: pointer; }
#result { background: #fff3e0; padding: 15px; border-radius: 4px; margin-top: 20px; }