content: import 'package:flutter/material.dart';
  
  ThemeData darkTheme = ThemeData(
    //colorSchemeSeed: Colors.yellow,
    brightness: Brightness.dark,
    colorScheme: ColorScheme.dark(
        surface: const Color(0xff333333),
        primary: Colors.grey.shade200,
        secondary: Colors.grey.shade700),
    inputDecorationTheme: InputDecorationTheme(
        border: UnderlineInputBorder(
            borderRadius: BorderRadius.circular(
                10.0)), // OutlineInputBorder(borderRadius: BorderRadius.circular(10.0), borderSide: BorderSide.none),
        filled: true,
        fillColor: Colors.grey.shade900),
    snackBarTheme: SnackBarThemeData(backgroundColor: Colors.grey.shade600),
    appBarTheme: AppBarTheme(
        backgroundColor: Colors.yellow, foregroundColor: Colors.grey.shade900),
    tabBarTheme: TabBarThemeData(
        indicatorColor: Colors.grey.shade900,
        labelColor: Colors.grey.shade900,
        unselectedLabelColor: Colors.grey.shade900.withOpacity(0.5),
        tabAlignment: TabAlignment.fill),
  
    elevatedButtonTheme: ElevatedButtonThemeData(
        style: ButtonStyle(
            padding: WidgetStateProperty.all<EdgeInsetsGeometry>(
                const EdgeInsets.symmetric(horizontal: 20.0, vertical: 10.0)),
            shape: WidgetStateProperty.all<OutlinedBorder>(RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(10.0))),
            backgroundColor: WidgetStateProperty.all<Color>(Colors.white),
            foregroundColor: WidgetStateProperty.all<Color>(Colors.black),
            overlayColor: WidgetStateProperty.all<Color>(Colors.black26))),
  );
  
     // darkTheme: ThemeData.dark(useMaterial3: true).copyWith(
          //     primaryColor: Colors.red,
          //     colorScheme: ColorScheme.fromSwatch(
          //         primarySwatch: Colors.yellow,
          //         backgroundColor: Colors.red,
          //         accentColor: Colors.yellow.shade600,
          //         brightness: Brightness.dark)),
  
  
   //darkTheme: ThemeData(colorSchemeSeed: Colors.yellow, brightness: Brightness.dark)
          //.copyWith(colorScheme: ColorScheme.fromSeed(seedColor: Colors.red), primaryColor: Colors.green
          // onSecondaryContainer: Colors.red,
          // tertiary: Colors.red,
          // onTertiary: Colors.red,
          // onTertiaryContainer: Colors.red,
          // onBackground: Colors.red,
          // background: Colors.grey.shade800,
          // primaryContainer: Colors.yellow,
          // secondary: Colors.red,
          // onSecondary: Colors.green,
          // onPrimary: Colors.yellow,R
          // onPrimaryContainer: Colors.grey.shade800),
          //),
          //,
          // darkTheme: ThemeData(
          //   useMaterial3: true,
          //   primaryColor: Colors.red,
          //   // buttonTheme: Theme.of(context).buttonTheme.copyWith(
          //   //       colorScheme: ColorScheme.light().copyWith(
          //   //           background: Colors.grey.shade800,
          //   //           primaryContainer: Colors.yellow,
          //   //           secondary: Colors.red,
          //   //           onSecondary: Colors.green,
          //   //           onSecondaryContainer: Colors.red,
  
          //   //           onPrimary: Colors.yellow,
          //   //           onPrimaryContainer: Colors.grey.shade800),
          //   //     ),
          //   tabBarTheme: const TabBarTheme(
          //       labelColor: Colors.yellow, labelStyle: TextStyle(color: Colors.yellow), indicatorColor: Colors.yellow
  
          //       //primaryColor: Colors.pink[800], // outdated and has no effect to Tabbar
          //       //accentColor: Colors.cyan[600] // deprecated,
          //       ),
          //   //scaffoldBackgroundColor: Colors.red,
          //   appBarTheme: AppBarTheme(backgroundColor: Colors.grey.shade600),
          //   colorScheme: ColorScheme.dark().copyWith(
          //       onSecondaryContainer: Colors.red,
          //       tertiary: Colors.red,
          //       onTertiary: Colors.red,
          //       onTertiaryContainer: Colors.red,
          //       onBackground: Colors.red,
          //       background: Colors.grey.shade800,
          //       primaryContainer: Colors.yellow,
          //       secondary: Colors.red,
          //       onSecondary: Colors.green,
          //       onPrimary: Colors.yellow,
          //       onPrimaryContainer: Colors.grey.shade800),
  
          //   // appBarTheme: AppBarTheme(
          //   //   backgroundColor: Colors.red,
          //   // )
          // ),
          // darkTheme: ThemeData(
          //     primarySwatch: Colors.red,
          //     primaryColor: Colors.black,
          //     backgroundColor: Colors.black,
          //     indicatorColor: Color(0xff0E1D36),
          //     //buttonColor: Color(0xff3B3B3B),
          //     hintColor: Color(0xff280C0B),
          //     highlightColor: Color(0xff372901),
          //     hoverColor: Color(0xff3A3A3B),
          //     focusColor: Color(0xff0B2512),
          //     disabledColor: Colors.grey,
          //     //textSelectionColor: Colors.white,
          //     cardColor: Color(0xFF151515),
          //     canvasColor: Colors.black,
          //     brightness: Brightness.dark,
          //     buttonTheme: Theme.of(context).buttonTheme.copyWith(buttonColor: Colors.red)),