#tamphuc-chatbot {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 320px;
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    overflow: hidden;
    font-family: Arial, sans-serif;
}
#tamphuc-chatbot .chatbot-header {
    background: #e91e63;
    color: #fff;
    padding: 10px;
    display: flex;
    align-items: center;
}
#tamphuc-chatbot .chatbot-header img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    margin-right: 10px;
}
#tamphuc-chatbot .chatbot-messages {
    max-height: 300px;
    overflow-y: auto;
    padding: 10px;
    background: #fafafa;
}
#tamphuc-chatbot .msg {
    margin-bottom: 8px;
    padding: 8px 12px;
    border-radius: 10px;
    max-width: 80%;
}
#tamphuc-chatbot .user-msg {
    background: #d1f7c4;
    align-self: flex-end;
}
#tamphuc-chatbot .bot-msg {
    background: #f1f1f1;
}
#tamphuc-chatbot .chatbot-input {
    display: flex;
    border-top: 1px solid #ddd;
}
#tamphuc-chatbot .chatbot-input input {
    flex: 1;
    border: none;
    padding: 10px;
}
#tamphuc-chatbot .chatbot-input button {
    background: #e91e63;
    color: white;
    border: none;
    padding: 10px 15px;
}