/* BBSIA mobile: the chat is the product. Hide the rail and give the
       conversation the full viewport instead of a 90px sliver. */
    @media (max-width: 768px) {
        .chat-sidebar { display: none !important; }
        .main-wrapper { width: 100vw !important; }
        .window-element,
        .window-element-glass {
            left: 0 !important;
            top: 0 !important;
            width: 100vw !important;
            max-width: none !important;
            height: calc(100vh - 52px) !important;
            border-radius: 0 !important;
        }
        .window-element .window-body,
        .window-element-glass .window-body {
            height: calc(100% - 34px) !important;
        }
        /* The composer needs the width for the message, not a model legend. */
        #modelPicker { display: none !important; }
    }