#chatbot-container {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    border: 2px solid #007bff;
    padding: 15px;
    border-radius: 10px;
    background: #f9f9f9;
    font-family: Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    margin: 10px auto;
    white-space: nowrap;
}

#chatbot-messages {
    height: 280px;
    overflow-y: auto;
    border-bottom: 1px solid #ccc;
    margin-bottom: 12px;
    padding: 8px;
    background: #fff;
    border-radius: 6px;
}

.user-msg, .bot-msg {
    margin: 8px 0;
    padding: 8px 12px;
    border-radius: 8px;
    max-width: 90%;
    word-wrap: break-word;
    word-break: break-word;       /* 👈 fix tràn chữ */
    white-space: normal;          /* 👈 cho phép xuống dòng */
    overflow-wrap: anywhere;      /* 👈 chống tràn ký tự */
}

.user-msg {
    background: #e6f0ff;
    color: #000;
    text-align: left;
}

.bot-msg {
    background: #dfffe0;
    color: #000;
    text-align: left;
}

#chatbot-container input[type="text"],
#chatbot-container button {
    display: inline-block;
    vertical-align: middle;
}

#chatbot-input {
    width: calc(100% - 110px);
    margin-right: 10px;
    padding: 10px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 6px;
    box-sizing: border-box;
}

#chatbot-send {
    width: 100px;
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px;
    font-size: 16px;
    border-radius: 6px;
    cursor: pointer;
    white-space: nowrap;
}

#chatbot-send:hover {
    background-color: #0056b3;
}

/* Mobile responsive */
@media (max-width: 600px) {
    #chatbot-container {
        white-space: normal;
        font-size: 15px;
        padding: 10px;
    }

    #chatbot-messages {
        height: 200px;
        font-size: 15px;
    }

    #chatbot-input,
    #chatbot-send {
        display: block;
        width: 100%;
        margin: 0 0 10px 0;
    }

    #chatbot-send {
        margin-bottom: 0;
    }
}