body {
    background-color: #f8f9fa;
}

.chat-window, .history-window {
    height: 400px;
    overflow-y: auto;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: #fff;
}

.message {
    margin-bottom: 10px;
    padding: 10px;
    border-radius: 5px;
}

.user-message {
    background-color: #007bff;
    color: white;
    align-self: flex-end;
}

.bot-message {
    background-color: #e9ecef;
    color: black;
    align-self: flex-start;
}

.history-window .message {
    background-color: #f1f1f1;
    cursor: pointer;
}

.history-window .message:hover {
    background-color: #ddd;
}