@media screen and (max-width: 575px) {
    
    #chatbot-iframe.chat-open {
        max-width: 100vw !important;
        max-height: 100vh !important;
        bottom: 0px !important;
        top: 0px !important;
        right: 0px !important;
        left: 0px !important;
        border-radius: 0px !important;
    }
}