body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}
#chat-container {
    border: 1px solid #ccc;
    padding: 20px;
    height: 400px;
    overflow-y: auto;
}
#user-input {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
}
#send-button {
    display: block;
    width: 100%;
    padding: 10px;
    margin-top: 10px;
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}