body{font-family:Arial,sans-serif;line-height:1.6;color:#333;max-width:800px;margin:0 auto;padding:20px;background-color:#f4f4f4}h1{color:#2c3e50;text-align:center}.container{background-color:#fff;padding:20px;border-radius:5px;box-shadow:0 0 10px #0000001a}textarea{width:100%;padding:10px;margin-bottom:10px;border:1px solid #ddd;border-radius:4px;resize:vertical}button{display:block;width:100%;padding:10px;background-color:#3498db;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:16px}button:hover{background-color:#2980b9}#result{margin-top:20px;padding:10px;background-color:#ecf0f1;border-radius:4px}