body {
    font-family: Arial, sans-serif;
    padding: 40px;
    background-color: #f7f7f7;
}
.container {
    max-width: 600px;
    margin: auto;
}
textarea {
    width: 100%;
    height: 100px;
}
button {
    padding: 10px 20px;
}
.result {
    margin-top: 20px;
    padding: 10px;
    background: #e0ffe0;
}