body {
    font-family: Arial, sans-serif;
    max-width: 700px;
    margin: 50px auto;
    padding: 20px;
    background: #f5f5f5;
}

h1 {
    text-align: center;
}

textarea {
    width: 100%;
    font-size: 16px;
    padding: 10px;
}

button {
    padding: 10px 25px;
    font-size: 16px;
    cursor: pointer;
}