content: import 'dart:ui';
  
  import 'package:flutter/material.dart';
  
  class CustomAlert extends StatefulWidget {
    final Widget child;
  
    const CustomAlert({super.key, required this.child});
  
    @override
    State<CustomAlert> createState() => _CustomAlertState();
  }
  
  class _CustomAlertState extends State<CustomAlert> {
    late double deviceWidth;
  
    late double deviceHeight;
  
    late double dialogHeight;
  
    @override
    Widget build(BuildContext context) {
      final Orientation orientation = MediaQuery.of(context).orientation;
      final Size viewsSize = MediaQuery.of(context).size;
  
      deviceWidth = orientation == Orientation.portrait
          ? viewsSize.width
          : viewsSize.height;
      deviceHeight = orientation == Orientation.portrait
          ? viewsSize.height
          : viewsSize.width;
      dialogHeight = deviceHeight * (0.50);
  
      return MediaQuery(
        data: const MediaQueryData(),
        child: GestureDetector(
          child: BackdropFilter(
            filter: ImageFilter.blur(
              sigmaX: 0.5,
              sigmaY: 0.5,
            ),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                Expanded(
                  child: Stack(
                    children: <Widget>[
                      Center(
                        child: Padding(
                          padding: const EdgeInsets.symmetric(horizontal: 40),
                          child: Card(
                            shape: const RoundedRectangleBorder(
                              borderRadius: BorderRadius.all(
                                Radius.circular(10.0),
                              ),
                            ),
                            child: widget.child,
                          ),
                        ),
                      ),
                    ],
                  ),
                ),
              ],
            ),
          ),
        ),
      );
    }
  }
  