body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    background-color: #f4f4f9;
}
button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    background-color: #4caf50;
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}
button:hover {
    background-color: #45a049;
}
#sentence {
    margin-top: 20px;
    font-size: 18px;
    color: #333;
}