diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a440f0e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+backend/app
diff --git a/backend/main.go b/backend/main.go
index 213b0b6..ccef420 100644
--- a/backend/main.go
+++ b/backend/main.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"net/http"
 	"os"
 
@@ -10,20 +11,22 @@ import (
 func main() {
 	connectDB()
 
-	r := chi.NewRouter()
+	router := chi.NewRouter()
 
-	r.Use(authMiddleware)
+	router.Use(logMiddleware)
+	router.Use(authMiddleware)
 
 	// routes
-	r.Get("/quotes", getQuotes)
-	r.Post("/quotes", createQuote)
-	r.Put("/quotes/{id}", updateQuote)
-	r.Delete("/quotes/{id}", deleteQuote)
+	router.Get("/quotes", getQuotes)
+	router.Post("/quotes", createQuote)
+	router.Put("/quotes/{id}", updateQuote)
+	router.Delete("/quotes/{id}", deleteQuote)
 
 	port := os.Getenv("PORT")
 	if port == "" {
 		port = "8080"
 	}
 
-	http.ListenAndServe(":"+port, r)
-}
\ No newline at end of file
+	fmt.Println("started and listening on localhost:" + port)
+	http.ListenAndServe(":"+port, router)
+}
diff --git a/backend/middleware.go b/backend/middleware.go
index fbf2d45..83ac4a3 100644
--- a/backend/middleware.go
+++ b/backend/middleware.go
@@ -1,8 +1,14 @@
 package main
 
 import (
+	"bytes"
+	"fmt"
+	"io"
 	"net/http"
 	"os"
+	"time"
+
+	"crypto/subtle"
 )
 
 func authMiddleware(next http.Handler) http.Handler {
@@ -18,7 +24,7 @@ func authMiddleware(next http.Handler) http.Handler {
 
 		expectedHeader := "Bearer " + expectedKey
 
-		if authHeader != expectedHeader {
+		if subtle.ConstantTimeCompare([]byte(authHeader), []byte(expectedHeader)) != 1 {
 			http.Error(w, "unauthorized", http.StatusUnauthorized)
 			return
 		}
@@ -26,3 +32,32 @@ func authMiddleware(next http.Handler) http.Handler {
 		next.ServeHTTP(w, r)
 	})
 }
+
+func logMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		reqMethod := r.Method
+		reqUrl := r.URL.String()
+		reqIp := r.RemoteAddr
+		reqHeaderContentType := r.Header.Get("Content-Type")
+		defer r.Body.Close()
+		bodyBytes, err := io.ReadAll(r.Body)
+		if err != nil {
+			http.Error(w, "[log] Failed to read body", http.StatusBadRequest)
+			return
+		}
+
+		fmt.Printf("\n[%s] %s request on %s\n", reqIp, reqMethod, reqUrl)
+		fmt.Println("Timestamp (UTC):      " + time.Now().UTC().String())
+		fmt.Println("Header Content-Type:  " + reqHeaderContentType)
+		if len(bodyBytes) == 0 {
+			fmt.Println("Body:                 <empty>")
+		} else {
+			fmt.Println("Body:                 " + string(bodyBytes))
+		}
+
+		// restore the request body for later
+		r.Body = io.NopCloser(bytes.NewBuffer(bodyBytes))
+
+		next.ServeHTTP(w, r)
+	})
+}
diff --git a/backend/run_test_env.sh b/backend/run_test_env.sh
new file mode 100755
index 0000000..d597967
--- /dev/null
+++ b/backend/run_test_env.sh
@@ -0,0 +1 @@
+~/.local/test-envs/hlaskovnik-reimagined/activate.sh
diff --git a/frontend/.vscode/settings.json b/frontend/.vscode/settings.json
new file mode 100644
index 0000000..f8acfe8
--- /dev/null
+++ b/frontend/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "dart.flutterSdkPath": "/opt/flutter"
+}
\ No newline at end of file
diff --git a/frontend/lib/main.dart b/frontend/lib/main.dart
index 39a0d06..95cc867 100644
--- a/frontend/lib/main.dart
+++ b/frontend/lib/main.dart
@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:frontend/provider/theme_provider.dart';
 import 'package:go_router/go_router.dart';
 import 'package:provider/provider.dart';
 
@@ -13,14 +14,21 @@ import 'pages/list.dart';
 import 'pages/add.dart';
 import 'pages/flashcards.dart';
 import 'pages/leaderboard.dart';
-import 'pages/settings.dart';
+//import 'pages/settings.dart';
 
 void main() {
   runApp(
-    ChangeNotifierProvider(
-      create: (_) => QuoteProvider(),
-      child: HlaskovnikFrontendApp(),
-    ),
+    MultiProvider(
+      providers: [
+        ChangeNotifierProvider(
+          create: (_) => QuoteProvider()
+        ),
+        ChangeNotifierProvider(
+          create: (_) => ThemeProvider()
+        )
+      ],
+      child: HlaskovnikFrontendApp()
+    )
   );
 }
 
@@ -38,7 +46,7 @@ class HlaskovnikFrontendApp extends StatelessWidget {
           GoRoute(path: '/add', builder: (context, state) => AddPage()),
           GoRoute(path: '/flashcards', builder: (context, state) => FlashcardsPage()),
           GoRoute(path: '/leaderboard', builder: (context, state) => LeaderboardPage()),
-          GoRoute(path: '/settings', builder: (context, state) => SettingsPage()),
+          //GoRoute(path: '/settings', builder: (context, state) => SettingsPage()),
         ],
       ),
     ],
@@ -46,6 +54,7 @@ class HlaskovnikFrontendApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final themeProvider = context.watch<ThemeProvider>();
     return MaterialApp.router(
       title: Strings.appName,
       theme: ThemeData(
@@ -62,7 +71,7 @@ class HlaskovnikFrontendApp extends StatelessWidget {
         ),
         useMaterial3: true,
       ),
-      themeMode: ThemeMode.system,
+      themeMode: themeProvider.isDark ? ThemeMode.dark : ThemeMode.system,
       routerConfig: _router,
     );
   }
diff --git a/frontend/lib/main_scaffold.dart b/frontend/lib/main_scaffold.dart
index 2e64928..62b0a08 100644
--- a/frontend/lib/main_scaffold.dart
+++ b/frontend/lib/main_scaffold.dart
@@ -13,7 +13,7 @@ class MainScaffold extends StatelessWidget {
       case '/add': return 1;
       case '/flashcards': return 2;
       case '/leaderboard': return 3;
-      case '/settings': return 4;
+      //case '/settings': return 4;
       default: return 0;
     }
   }
@@ -36,7 +36,7 @@ class MainScaffold extends StatelessWidget {
             case 1: context.go('/add'); break;
             case 2: context.go('/flashcards'); break;
             case 3: context.go('/leaderboard'); break;
-            case 4: context.go('/settings'); break;
+            //case 4: context.go('/settings'); break;
           }
         },
 
@@ -45,7 +45,7 @@ class MainScaffold extends StatelessWidget {
           BottomNavigationBarItem(icon: Icon(Icons.add), label: Strings.add),
           BottomNavigationBarItem(icon: Icon(Icons.repeat), label: Strings.flashcards),
           BottomNavigationBarItem(icon: Icon(Icons.leaderboard), label: Strings.leaderboard),
-          BottomNavigationBarItem(icon: Icon(Icons.settings), label: Strings.settings),
+          //BottomNavigationBarItem(icon: Icon(Icons.settings), label: Strings.settings),
         ],
       ),
     );
diff --git a/frontend/lib/model/quote.dart b/frontend/lib/model/quote.dart
index f50c252..7473cd0 100644
--- a/frontend/lib/model/quote.dart
+++ b/frontend/lib/model/quote.dart
@@ -18,4 +18,9 @@ class Quote{
       body: json['body'],
     );
   }
+
+  @override 
+  String toString() {
+    return "$body - $author";
+  }
 }
\ No newline at end of file
diff --git a/frontend/lib/pages/add.dart b/frontend/lib/pages/add.dart
index fb8be0e..bfb5e98 100644
--- a/frontend/lib/pages/add.dart
+++ b/frontend/lib/pages/add.dart
@@ -21,18 +21,9 @@ class AddPage extends StatelessWidget {
         padding: const EdgeInsets.all(Constants.edgeInset),
         child: Column(
           mainAxisSize: MainAxisSize.min,
-          crossAxisAlignment: CrossAxisAlignment.start,
+          crossAxisAlignment: CrossAxisAlignment.center,
+          mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            Text(
-              Strings.createQuote,
-              style: const TextStyle(
-                fontSize: 18,
-                fontWeight: FontWeight.bold,
-              ),
-            ),
-
-            const SizedBox(height: 12),
-
             TextField(
               autofocus: true,
               controller: bodyController,
diff --git a/frontend/lib/pages/flashcards.dart b/frontend/lib/pages/flashcards.dart
index f2973c4..703df0c 100644
--- a/frontend/lib/pages/flashcards.dart
+++ b/frontend/lib/pages/flashcards.dart
@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
 
 import 'package:frontend/provider/quote_provider.dart';
-import 'package:frontend/model/quote.dart';
 
 import 'package:provider/provider.dart';
 
@@ -15,6 +14,8 @@ class FlashcardsPage extends StatelessWidget {
   Widget build(BuildContext context) {
     //return const Center(child: Text('flashcards! flip flip'));
     final provider = Provider.of<QuoteProvider>(context);
+    if (provider.randomQuoteText == "dummy" ||
+    provider.randomQuoteText == "quote text") { provider.nextRandomQuote(); } // initialize the random quote variable 
     return Card(
       margin: const EdgeInsets.all(Constants.edgeInset),
       child: Padding(
@@ -22,22 +23,46 @@ class FlashcardsPage extends StatelessWidget {
         child: Column(
           mainAxisSize: MainAxisSize.min,
           crossAxisAlignment: CrossAxisAlignment.center,
+          mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            Text('insert random quote body here'),
-            Row(
-              mainAxisAlignment: MainAxisAlignment.center,
-              children: [
-                TextButton(
-                  child: Text('flip around'),
-                  onPressed: () {
-                    // TODO: flip the card
-                  },
+            Padding(
+              padding: const EdgeInsets.all(Constants.edgeInset*2),
+              child: Text(provider.randomQuoteText,
+                style: TextStyle(
+                  fontSize: 35,
                 ),
-                TextButton(
-                  child: Text('next card'),
-                  onPressed: () {
-                    // TODO: next random card
-                  },
+              ),
+            ),
+            Column(
+              mainAxisAlignment: MainAxisAlignment.end,
+              children: [
+                Padding(
+                  padding: const EdgeInsets.all(Constants.edgeInset),
+                  child: TextButton.icon(
+                    onPressed: provider.flipRandomQuote,
+                    icon: Icon(Icons.repeat,
+                      size: 35,
+                    ),
+                    label: Text(Strings.flipFlashcard,
+                      style: TextStyle(
+                        fontSize: 35,
+                      ),
+                    ),
+                  ),
+                ),
+                Padding(
+                  padding: const EdgeInsets.all(Constants.edgeInset),
+                  child: TextButton.icon(
+                    onPressed: provider.nextRandomQuote,
+                    icon: Icon(Icons.arrow_right_alt,
+                      size: 35,
+                    ),
+                    label: Text(Strings.nextFlashcard,
+                      style: TextStyle(
+                        fontSize: 35,
+                      ),
+                    ),
+                  ),
                 ),
               ],
             ),
diff --git a/frontend/lib/pages/leaderboard.dart b/frontend/lib/pages/leaderboard.dart
index 5b99915..96b2cdf 100644
--- a/frontend/lib/pages/leaderboard.dart
+++ b/frontend/lib/pages/leaderboard.dart
@@ -1,10 +1,48 @@
 import 'package:flutter/material.dart';
+import 'package:frontend/provider/quote_provider.dart';
+import 'package:frontend/values/constants.dart';
+import 'package:provider/provider.dart';
 
 class LeaderboardPage extends StatelessWidget {
   const LeaderboardPage({super.key});
 
   @override
   Widget build(BuildContext context) {
-    return const Center(child: Text('top 3!'));
+    final provider = context.watch<QuoteProvider>();
+    return Center(
+      child: Column(
+        children: [
+          Expanded(
+            child: ListView.builder(
+              padding: EdgeInsets.all(Constants.edgeInset),
+              itemCount: provider.filteredQuotes.length,
+              itemBuilder: (context, index) {            
+                return
+                    Card(
+                      color: provider.getLeaderboardEntryBgColor(context, index),
+                      child: ListTile(
+                        contentPadding: EdgeInsets.symmetric(
+                          vertical: 0,
+                          horizontal: Constants.edgeInset,
+                        ),
+                        title: Text(provider.sortedAuthorCounts[index].key,
+                          style: TextStyle(
+                            color: provider.getLeaderboardEntryFgColor(context, index)
+                          ),
+                        ),
+                        trailing: Text(provider.sortedAuthorCounts[index].value.toString(),
+                          style: TextStyle(
+                            fontSize: 16,
+                            color: provider.getLeaderboardEntryFgColor(context, index),
+                          ),
+                        ),
+                      ),
+                    );
+              },
+            ),
+          ),
+        ],
+      ),
+    );
   }
 }
\ No newline at end of file
diff --git a/frontend/lib/pages/list.dart b/frontend/lib/pages/list.dart
index fa7487a..8a9ba4c 100644
--- a/frontend/lib/pages/list.dart
+++ b/frontend/lib/pages/list.dart
@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 
 import 'package:frontend/provider/quote_provider.dart';
 import 'package:frontend/model/quote.dart';
+import 'package:frontend/provider/theme_provider.dart';
 import 'package:frontend/values/strings.dart';
 import 'package:provider/provider.dart';
 
@@ -13,15 +14,16 @@ class ListPage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final provider = context.watch<QuoteProvider>();
+    final themeProvider = context.watch<ThemeProvider>();
     return RefreshIndicator(
       onRefresh: () async {
         await provider.readQuotes();
       },
-      child: _bodyBuilder(context, provider),
+      child: _bodyBuilder(context, provider, themeProvider),
     );
   }
 
-  Widget _bodyBuilder(BuildContext context, QuoteProvider provider) {   
+  Widget _bodyBuilder(BuildContext context, QuoteProvider provider, ThemeProvider themeProvider) {   
     if (provider.loading) {
       return Center(child: CircularProgressIndicator());
     }
@@ -51,7 +53,7 @@ class ListPage extends StatelessWidget {
               ),
             ),
           ),
-          filterBar(context, provider),
+          filterBar(context, provider, themeProvider),
           Expanded(
             child: ListView.builder(
               padding: EdgeInsets.all(Constants.edgeInset),
@@ -220,7 +222,7 @@ class ListPage extends StatelessWidget {
     );
   }
 
-  Widget filterBar(BuildContext context, QuoteProvider provider) {
+  Widget filterBar(BuildContext context, QuoteProvider provider, ThemeProvider themeProvider) {
     return Padding(
       padding: const EdgeInsets.all(Constants.edgeInset),
       child: Row(
@@ -246,7 +248,7 @@ class ListPage extends StatelessWidget {
           IconButton(
             icon: Icon(Icons.more_horiz),
             onPressed: () {
-              _showOptionsBottomSheet(context, provider);
+              _showOptionsBottomSheet(context, provider, themeProvider);
             },
           ),
         ],
@@ -254,7 +256,7 @@ class ListPage extends StatelessWidget {
     );
   }
 
-  void _showOptionsBottomSheet(BuildContext context, QuoteProvider provider) {
+  void _showOptionsBottomSheet(BuildContext context, QuoteProvider provider, ThemeProvider themeProvider) {
     showModalBottomSheet(
       context: context,
       builder: (context) {
@@ -274,8 +276,34 @@ class ListPage extends StatelessWidget {
                   title: Text(Strings.exportSelectedQuotes),
                   trailing: Icon(Icons.import_export),
                   onTap: () {
-                    // TODO: trigger an os dialog FileSave
-                  },
+                    provider.exportQuotesToFile();
+                    Navigator.pop(context);
+                    ScaffoldMessenger.of(context).showSnackBar(
+                      SnackBar(
+                        content: Text(Strings.fileExportedSuccessfully),
+                        duration: const Duration(seconds: 3),
+                      ),
+                    );
+                  }
+                ),
+                ListTile(
+                  title: Text(Strings.userPrefersDarkMode),
+                  onTap: () { themeProvider.setDarkMode(!themeProvider.isDark); },
+                  trailing: Row(
+                    mainAxisSize: MainAxisSize.min,
+                    children: [
+                      Padding(
+                        padding: const EdgeInsets.only(right: Constants.edgeInset),
+                        child: Switch(
+                          onChanged: (value) {
+                            themeProvider.setDarkMode(value);
+                          }, 
+                          value: themeProvider.isDark
+                        ),
+                      ),
+                      Icon(Icons.dark_mode),
+                    ],
+                  ),
                 ),
               ],
             ),
@@ -296,43 +324,37 @@ class ListPage extends StatelessWidget {
           child: Column(
             mainAxisSize: MainAxisSize.min,
             children: [
-              ListTile(
-                title: const Text(Strings.author),
-                leading: Radio<int>(
-                  value: 0,
-                  groupValue: provider.filterBy,
-                  onChanged: (value) {
-                    if (value != null) {
-                      provider.setFilterBy(value);
-                      Navigator.pop(context);
-                    }
-                  },
-                ),
-                onTap: () {
-                  provider.setFilterBy(0);
-                  Navigator.pop(context);
+              RadioGroup<int>(
+                groupValue: provider.filterBy,
+                onChanged: (value) {
+                  if (value != null) {
+                    provider.setFilterBy(value);
+                    Navigator.pop(context);
+                  }
                 },
-              ),
-
-              ListTile(
-                title: const Text(Strings.quote),
-                leading: Radio<int>(
-                  value: 1,
-                  groupValue: provider.filterBy,
-                  onChanged: (value) {
-                    if (value != null) {
-                      provider.setFilterBy(value);
-                      Navigator.pop(context);
-                    }
-                  },
+                child: Column(
+                  children: [
+                    ListTile(
+                      title: const Text(Strings.author),
+                      leading: Radio<int>(value: 0),
+                      onTap: () {
+                        provider.setFilterBy(0);
+                        Navigator.pop(context);
+                      },
+                    ),
+                    ListTile(
+                      title: const Text(Strings.quote),
+                      leading: Radio<int>(value: 1),
+                      onTap: () {
+                        provider.setFilterBy(1);
+                        Navigator.pop(context);
+                      },
+                    ),
+                  ],
                 ),
-                onTap: () {
-                  provider.setFilterBy(1);
-                  Navigator.pop(context);
-                },
               ),
             ],
-          ),
+          )
         );
       },
     );
diff --git a/frontend/lib/pages/settings.dart b/frontend/lib/pages/settings.dart
index 74b01b2..8da43c9 100644
--- a/frontend/lib/pages/settings.dart
+++ b/frontend/lib/pages/settings.dart
@@ -1,10 +1,30 @@
+// !!! MADE REDUNDANT !!!
+
 import 'package:flutter/material.dart';
+//import 'package:frontend/provider/quote_provider.dart';
+
+//import 'package:frontend/values/strings.dart';
+//import 'package:provider/provider.dart';
+
+/// settings items
+/// 1. import quotes from file
+
 
 class SettingsPage extends StatelessWidget {
   const SettingsPage({super.key});
 
   @override
   Widget build(BuildContext context) {
-    return const Center(child: Text('let\'s set something up!'));
+    //final provider = context.watch<QuoteProvider>();
+    return const Center(
+      child: Card(
+        child: Row(
+          children: [
+            //Text(Strings.importQuotesFromFile),
+            //IconButton(onPressed: provider.importQuotesFromFile, icon: icon)
+          ],
+        ),
+      ),
+    );
   }
 }
\ No newline at end of file
diff --git a/frontend/lib/provider/quote_provider.dart b/frontend/lib/provider/quote_provider.dart
index a21cee0..f9c35b8 100644
--- a/frontend/lib/provider/quote_provider.dart
+++ b/frontend/lib/provider/quote_provider.dart
@@ -1,9 +1,12 @@
 // gets all quotes from the database and returns them in a list
 
+import 'package:path_provider/path_provider.dart';
 import 'package:flutter/material.dart';
 
 import 'package:frontend/model/quote.dart';
 import 'package:frontend/repository/quote_repository.dart';
+import 'dart:math';
+import 'dart:io';
 
 class QuoteProvider extends ChangeNotifier {
   List<Quote> _quotes = [];
@@ -18,7 +21,7 @@ class QuoteProvider extends ChangeNotifier {
   List<Quote> get filteredQuotes {
     final query = filterController.text.toLowerCase();
 
-    return _quotes.where((quote) {
+    final filtered = _quotes.where((quote) {
       switch (filterBy) {
         case 0:
           return quote.author.toLowerCase().contains(query);
@@ -28,6 +31,28 @@ class QuoteProvider extends ChangeNotifier {
           return true;
       }
     }).toList();
+
+    // sort descending
+    filtered.sort((a, b) => b.id.compareTo(a.id));
+
+    return filtered;
+  }
+
+  List<MapEntry<String, int>> get sortedAuthorCounts {
+    final counts = <String, int>{};
+
+    for (var quote in filteredQuotes) {
+      counts.update(
+        quote.author,
+        (value) => value + 1,
+        ifAbsent: () => 1,
+      );
+    }
+
+    final list = counts.entries.toList()
+      ..sort((a, b) => b.value.compareTo(a.value)); // descending
+
+    return list;
   }
 
   final QuoteRepository repo = QuoteRepository();
@@ -39,6 +64,31 @@ class QuoteProvider extends ChangeNotifier {
     filterController.text = '';
   }
 
+  Quote randomQuote = Quote(
+    id: 0,
+    body: "quote text",
+    author: "dummy"
+  );
+  bool randomQuoteDeterminator = true;
+  String get randomQuoteText { 
+    if (randomQuoteDeterminator) {
+      return randomQuote.body;
+    } else {
+      return " – ${randomQuote.author}";
+    }
+  }
+
+  void flipRandomQuote() {
+    randomQuoteDeterminator = !randomQuoteDeterminator;
+    notifyListeners();
+  }
+
+  void nextRandomQuote() {
+    final random = Random();
+    randomQuote = filteredQuotes[random.nextInt(filteredQuotes.length)];
+    notifyListeners();
+  }
+
   void filterQuotes() {
     notifyListeners();
   }
@@ -118,4 +168,54 @@ class QuoteProvider extends ChangeNotifier {
     populateAuthors();
     notifyListeners();
   }
+
+
+  Future<Directory> _getSaveDirectory() async {
+    if (Platform.isWindows || Platform.isLinux || Platform.isMacOS) {
+      final path = Platform.isWindows
+          ? Platform.environment['USERPROFILE']
+          : Platform.environment['HOME'];
+
+      return Directory(path!);
+    }
+
+    // Mobile fallback
+    return await getApplicationDocumentsDirectory();
+  }
+
+  Future<void> exportQuotesToFile() async {
+    final dir = await _getSaveDirectory();
+
+    final datetime = DateTime.now().toUtc().toString()
+      .replaceAll(" ", "T")
+      .replaceAll(":", "-")
+      .replaceAll(RegExp(r"\..*"), "");
+
+    final file = File('${dir.path}/hlasky_$datetime.txt');
+    await file.writeAsString("${filteredQuotes.join("\n")}\n");
+  }
+
+  Color getLeaderboardEntryBgColor(BuildContext context, int index) {
+    switch (index) {
+      case 0:
+        return Colors.yellow.shade300; // 1st place
+      case 1:
+        return Colors.grey.shade300;   // 2nd place
+      case 2:
+        return Colors.brown.shade300;  // 3rd place
+      default:
+        return Theme.of(context).cardColor; // default for all other entries
+    }
+  }
+
+  Color getLeaderboardEntryFgColor(BuildContext context, int index) {
+    switch (index) {
+      case 0:
+      case 1:
+      case 2:
+        return Colors.black;
+      default:
+        return Theme.of(context).textTheme.bodyMedium!.color!;
+    }
+  }
 }
\ No newline at end of file
diff --git a/frontend/lib/provider/theme_provider.dart b/frontend/lib/provider/theme_provider.dart
new file mode 100644
index 0000000..25e8560
--- /dev/null
+++ b/frontend/lib/provider/theme_provider.dart
@@ -0,0 +1,34 @@
+
+import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+Future<void> saveDarkMode(bool isDark) async {
+  final prefs = await SharedPreferences.getInstance();
+  await prefs.setBool('darkMode', isDark);
+}
+
+Future<bool> loadDarkMode() async {
+  final prefs = await SharedPreferences.getInstance();
+  return prefs.getBool('darkMode') ?? false; // default light
+}
+
+class ThemeProvider extends ChangeNotifier {
+  bool _isDark = false;
+
+  bool get isDark => _isDark;
+
+  ThemeProvider() {
+    _load(); // load saved value on startup
+  }
+
+  void _load() async {
+    _isDark = await loadDarkMode();
+    notifyListeners();
+  }
+
+  void setDarkMode(bool value) async {
+    _isDark = value;
+    notifyListeners();
+    await saveDarkMode(value);
+  }
+}
\ No newline at end of file
diff --git a/frontend/lib/repository/quote_repository.dart b/frontend/lib/repository/quote_repository.dart
index 4440277..1996225 100644
--- a/frontend/lib/repository/quote_repository.dart
+++ b/frontend/lib/repository/quote_repository.dart
@@ -1,13 +1,12 @@
-// talks to the DB itself
-// TODO: implement the real one
-
 import 'dart:convert';
 import 'package:http/http.dart' as http;
 
 import 'package:frontend/model/quote.dart';
 
 class QuoteRepository {
-  static final String _apiBaseUrl = 'https://hlaskovnik-reimagined-latest.onrender.com';
+  //static final String _realApiBaseUrl = 'https://hlaskovnik-reimagined-latest.onrender.com';
+  static final String _testApiBaseUrl = 'http://localhost:8080';
+  static final String _apiBaseUrl = _testApiBaseUrl;
   static final String _apiKey = "2ogD5kc4sw3JVZoouQSV0w3LGRjSj5IjVFnAnk7IRCIK0ktONCeoOYinbNLSIHuU";
   static final String _quotesEndpoint = '/quotes';
 
diff --git a/frontend/lib/values/strings.dart b/frontend/lib/values/strings.dart
index 306cd05..c7d8193 100644
--- a/frontend/lib/values/strings.dart
+++ b/frontend/lib/values/strings.dart
@@ -19,10 +19,17 @@ class Strings {
   static const String quote = "Hláška";
   static const String author = "Autor";
 
+  static const String flipFlashcard = "Otočit flashkartu";
+  static const String nextFlashcard = "Další flashkarta";
+
+  //static const String importQuotesFromFile = "Importovat hlášky ze souboru";
+  static const String fileExportedSuccessfully = "Soubor byl úspěšně vyexportován.";
   static const String noUndo = "Tuto akci nelze odčinit.";
   static const String filterQuery = "Filtrovací požadavek";
   static const String allQuotesCount = "Celkový počet hlášek";
   static const String filterBy = "Filtrovat podle";
   static const String exportSelectedQuotes = "Exportovat vybrané hlášky";
   static const String byAttribute = "podle příznaku";
+
+  static const String userPrefersDarkMode = "Preferuji tmavý režim";
 }
\ No newline at end of file
diff --git a/frontend/macos/Flutter/GeneratedPluginRegistrant.swift b/frontend/macos/Flutter/GeneratedPluginRegistrant.swift
index cccf817..724bb2a 100644
--- a/frontend/macos/Flutter/GeneratedPluginRegistrant.swift
+++ b/frontend/macos/Flutter/GeneratedPluginRegistrant.swift
@@ -5,6 +5,8 @@
 import FlutterMacOS
 import Foundation
 
+import shared_preferences_foundation
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+  SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
 }
diff --git a/frontend/pubspec.lock b/frontend/pubspec.lock
index 8c4f5b3..ad637dc 100644
--- a/frontend/pubspec.lock
+++ b/frontend/pubspec.lock
@@ -5,10 +5,10 @@ packages:
     dependency: transitive
     description:
       name: async
-      sha256: "758e6d74e971c3e5aceb4110bfd6698efc7f501675bcfe0c775459a8140750eb"
+      sha256: e2eb0491ba5ddb6177742d2da23904574082139b07c1e33b8503b9f46f3e1a37
       url: "https://pub.dev"
     source: hosted
-    version: "2.13.0"
+    version: "2.13.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -33,6 +33,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.2"
+  code_assets:
+    dependency: transitive
+    description:
+      name: code_assets
+      sha256: "83ccdaa064c980b5596c35dd64a8d3ecc68620174ab9b90b6343b753aa721687"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
   collection:
     dependency: transitive
     description:
@@ -41,14 +49,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.19.1"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: c8ea0233063ba03258fbcf2ca4d6dadfefe14f02fab57702265467a19f27fadf
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.7"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
-      sha256: ba631d1c7f7bef6b729a622b7b752645a2d076dba9976925b8f25725a30e1ee6
+      sha256: "41e005c33bd814be4d3096aff55b1908d419fde52ca656c8c47719ec745873cd"
       url: "https://pub.dev"
     source: hosted
-    version: "1.0.8"
+    version: "1.0.9"
   fake_async:
     dependency: transitive
     description:
@@ -57,6 +73,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.3"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      sha256: "6d7fd89431262d8f3125e81b50d3847a091d846eafcd4fdb88dd06f36d705a45"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: a3b4f84adafef897088c160faf7dfffb7696046cb13ae90b508c2cbc95d3b8d4
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -80,14 +112,30 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      sha256: c3f1ee72c96f8f78935e18aa8cecced9ab132419e8625dc187e1c2408efc20de
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
   go_router:
     dependency: "direct main"
     description:
       name: go_router
-      sha256: "7974313e217a7771557add6ff2238acb63f635317c35fa590d348fb238f00896"
+      sha256: "48fb2f42ad057476fa4b733cb95e9f9ea7b0b010bb349ea491dca7dbdb18ffc4"
       url: "https://pub.dev"
     source: hosted
-    version: "17.1.0"
+    version: "17.2.0"
+  hooks:
+    dependency: transitive
+    description:
+      name: hooks
+      sha256: e79ed1e8e1929bc6ecb6ec85f0cb519c887aa5b423705ded0d0f2d9226def388
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.2"
   http:
     dependency: "direct main"
     description:
@@ -168,6 +216,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.17.0"
+  native_toolchain_c:
+    dependency: transitive
+    description:
+      name: native_toolchain_c
+      sha256: "6ba77bb18063eebe9de401f5e6437e95e1438af0a87a3a39084fbd37c90df572"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.17.6"
   nested:
     dependency: transitive
     description:
@@ -176,6 +232,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.0"
+  objective_c:
+    dependency: transitive
+    description:
+      name: objective_c
+      sha256: "100a1c87616ab6ed41ec263b083c0ef3261ee6cd1dc3b0f35f8ddfa4f996fe52"
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.3.0"
   path:
     dependency: transitive
     description:
@@ -184,6 +248,70 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.1"
+  path_provider:
+    dependency: "direct main"
+    description:
+      name: path_provider
+      sha256: "50c5dd5b6e1aaf6fb3a78b33f6aa3afca52bf903a8a5298f53101fdaee55bbcd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.5"
+  path_provider_android:
+    dependency: transitive
+    description:
+      name: path_provider_android
+      sha256: "149441ca6e4f38193b2e004c0ca6376a3d11f51fa5a77552d8bd4d2b0c0912ba"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.23"
+  path_provider_foundation:
+    dependency: transitive
+    description:
+      name: path_provider_foundation
+      sha256: "2a376b7d6392d80cd3705782d2caa734ca4727776db0b6ec36ef3f1855197699"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.6.0"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      sha256: f7a1fe3a634fe7734c8d3f2766ad746ae2a2884abe22e241a8b301bf5cac3279
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.1"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      sha256: "88f5779f72ba699763fa3a3b06aa4bf6de76c8e5de842cf6f29e2e06476c2334"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      sha256: bd6f00dbd873bfb70d0761682da2b3a2c2fccc2b9e84c495821639601d81afe7
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.0"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      sha256: "5d6b1b0036a5f331ebc77c850ebc8506cbc1e9416c27e59b439f917a902a4984"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.6"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      sha256: "4820fbfdb9478b1ebae27888254d445073732dae3d6ea81f0b7e06d5dedc3f02"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.8"
   provider:
     dependency: "direct main"
     description:
@@ -192,6 +320,70 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.1.5+1"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "5bfcf68ca79ef689f8990d1160781b4bad40a3bd5e5218ad4076ddb7f4081585"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
+  shared_preferences:
+    dependency: "direct main"
+    description:
+      name: shared_preferences
+      sha256: c3025c5534b01739267eb7d76959bbc25a6d10f6988e1c2a3036940133dd10bf
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.5"
+  shared_preferences_android:
+    dependency: transitive
+    description:
+      name: shared_preferences_android
+      sha256: e8d4762b1e2e8578fc4d0fd548cebf24afd24f49719c08974df92834565e2c53
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.23"
+  shared_preferences_foundation:
+    dependency: transitive
+    description:
+      name: shared_preferences_foundation
+      sha256: "4e7eaffc2b17ba398759f1151415869a34771ba11ebbccd1b0145472a619a64f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.6"
+  shared_preferences_linux:
+    dependency: transitive
+    description:
+      name: shared_preferences_linux
+      sha256: "580abfd40f415611503cae30adf626e6656dfb2f0cee8f465ece7b6defb40f2f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  shared_preferences_platform_interface:
+    dependency: transitive
+    description:
+      name: shared_preferences_platform_interface
+      sha256: "649dc798a33931919ea356c4305c2d1f81619ea6e92244070b520187b5140ef9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.2"
+  shared_preferences_web:
+    dependency: transitive
+    description:
+      name: shared_preferences_web
+      sha256: c49bd060261c9a3f0ff445892695d6212ff603ef3115edbb448509d407600019
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.3"
+  shared_preferences_windows:
+    dependency: transitive
+    description:
+      name: shared_preferences_windows
+      sha256: "94ef0f72b2d71bc3e700e025db3710911bd51a71cefb65cc609dd0d9a982e3c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -277,6 +469,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.1"
+  xdg_directories:
+    dependency: transitive
+    description:
+      name: xdg_directories
+      sha256: "7a3f37b05d989967cdddcbb571f1ea834867ae2faa29725fd085180e0883aa15"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      sha256: b9da305ac7c39faa3f030eccd175340f968459dae4af175130b3fc47e40d76ce
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.3"
 sdks:
   dart: ">=3.11.3 <4.0.0"
-  flutter: ">=3.35.0"
+  flutter: ">=3.38.4"
diff --git a/frontend/pubspec.yaml b/frontend/pubspec.yaml
index 924c57f..ece9de9 100644
--- a/frontend/pubspec.yaml
+++ b/frontend/pubspec.yaml
@@ -37,6 +37,8 @@ dependencies:
   provider:
   go_router:
   http: ^1.2.0
+  path_provider:
+  shared_preferences: ^2.1.1
 
 dev_dependencies:
   flutter_test: