diff --git a/lib/home_screen.dart b/lib/home_screen.dart
index fcae4d9..a40a0f8 100644
--- a/lib/home_screen.dart
+++ b/lib/home_screen.dart
@@ -12,6 +12,9 @@ import 'widgets/tap_bounce.dart';
 const Color _teal = Color(0xFF2F9E94);
 const Color _pink = Color(0xFFFF55A7);
 
+/// Nomes só podem ter letras (incluindo acentuadas) e espaços — sem números.
+final RegExp _namePattern = RegExp(r"^[a-zA-ZÀ-ÖØ-öø-ÿ' -]+$");
+
 class HomeScreen extends StatefulWidget {
   const HomeScreen({super.key});
 
@@ -369,6 +372,9 @@ class _AuthForm extends StatelessWidget {
                           final value = (v ?? '').trim();
                           if (value.isEmpty) return 'Informe seu nome';
                           if (value.length < 2) return 'Nome muito curto';
+                          if (!_namePattern.hasMatch(value)) {
+                            return 'O nome não pode conter números';
+                          }
                           return null;
                         },
                       ),
diff --git a/lib/logged_home.dart b/lib/logged_home.dart
index cb8b734..4cc6e20 100644
--- a/lib/logged_home.dart
+++ b/lib/logged_home.dart
@@ -15,9 +15,13 @@ import 'screens/settings_screen.dart';
 import 'screens/video_screen.dart';
 import 'widgets/animated_nav_icon.dart';
 import 'widgets/app_dialogs.dart';
+import 'widgets/app_gradients.dart';
 import 'widgets/entrance.dart';
 import 'widgets/tap_bounce.dart';
 
+/// Nomes só podem ter letras (incluindo acentuadas) e espaços — sem números.
+final RegExp _namePattern = RegExp(r"^[a-zA-ZÀ-ÖØ-öø-ÿ' -]+$");
+
 class LoggedHomeScreen extends StatefulWidget {
   const LoggedHomeScreen({super.key});
 
@@ -249,7 +253,13 @@ class _LoggedHomeScreenState extends State<LoggedHomeScreen>
             child: AppBar(
               toolbarHeight: toolbarHeight,
               clipBehavior: Clip.antiAlias,
-              flexibleSpace: _index != 0
+              flexibleSpace: ClipRRect(
+                borderRadius: BorderRadius.vertical(
+                  bottom: Radius.circular(_index == 0 ? 24 : 0),
+                ),
+                child: Container(
+                decoration: const BoxDecoration(gradient: kAppBarGradient),
+                child: _index != 0
                   ? null
                   : Stack(
                       fit: StackFit.expand,
@@ -304,6 +314,8 @@ class _LoggedHomeScreenState extends State<LoggedHomeScreen>
                           ),
                       ],
                     ),
+              ),
+              ),
               title: Align(
                 alignment: _index == 0 ? Alignment.topLeft : Alignment.center,
                 child: _index == 0
@@ -735,70 +747,83 @@ Future<Map<String, dynamic>?> _pickChildSheet(
       borderRadius: BorderRadius.vertical(top: Radius.circular(24)),
     ),
     builder: (ctx) {
+      final maxHeight = MediaQuery.sizeOf(ctx).height * 0.8;
       return SafeArea(
-        child: Padding(
-          padding: const EdgeInsets.fromLTRB(18, 6, 18, 18),
-          child: Column(
-            mainAxisSize: MainAxisSize.min,
-            crossAxisAlignment: CrossAxisAlignment.stretch,
-            children: [
-              const Text(
-                'Para qual criança é o quiz?',
-                textAlign: TextAlign.center,
-                style: TextStyle(
-                  fontSize: 18,
-                  fontWeight: FontWeight.w900,
-                  color: Color(0xFFFF55A7),
+        child: ConstrainedBox(
+          constraints: BoxConstraints(maxHeight: maxHeight),
+          child: Padding(
+            padding: const EdgeInsets.fromLTRB(18, 6, 18, 18),
+            child: Column(
+              mainAxisSize: MainAxisSize.min,
+              crossAxisAlignment: CrossAxisAlignment.stretch,
+              children: [
+                const Text(
+                  'Para qual criança é o quiz?',
+                  textAlign: TextAlign.center,
+                  style: TextStyle(
+                    fontSize: 18,
+                    fontWeight: FontWeight.w900,
+                    color: Color(0xFFFF55A7),
+                  ),
                 ),
-              ),
-              const SizedBox(height: 14),
-              ...children.map((c) {
-                final name = (c['name'] ?? '').toString();
-                final age = c['age'];
-                final label = age != null ? '$name  •  $age anos' : name;
-                return Padding(
-                  padding: const EdgeInsets.only(bottom: 10),
-                  child: TapBounce(
-                    scale: 0.97,
-                    child: Material(
-                    color: Colors.white.withValues(alpha: 0.85),
-                    borderRadius: BorderRadius.circular(16),
-                    child: InkWell(
-                      borderRadius: BorderRadius.circular(16),
-                      onTap: () => Navigator.of(ctx).pop(c),
-                      child: Padding(
-                        padding: const EdgeInsets.symmetric(
-                          horizontal: 16,
-                          vertical: 14,
-                        ),
-                        child: Row(
-                          children: [
-                            Expanded(
-                              child: Text(
-                                label,
-                                style: const TextStyle(
-                                  fontWeight: FontWeight.w800,
+                const SizedBox(height: 14),
+                Flexible(
+                  child: SingleChildScrollView(
+                    child: Column(
+                      crossAxisAlignment: CrossAxisAlignment.stretch,
+                      children: children.map((c) {
+                        final name = (c['name'] ?? '').toString();
+                        final age = c['age'];
+                        final label = age != null
+                            ? '$name  •  $age anos'
+                            : name;
+                        return Padding(
+                          padding: const EdgeInsets.only(bottom: 10),
+                          child: TapBounce(
+                            scale: 0.97,
+                            child: Material(
+                              color: Colors.white.withValues(alpha: 0.85),
+                              borderRadius: BorderRadius.circular(16),
+                              child: InkWell(
+                                borderRadius: BorderRadius.circular(16),
+                                onTap: () => Navigator.of(ctx).pop(c),
+                                child: Padding(
+                                  padding: const EdgeInsets.symmetric(
+                                    horizontal: 16,
+                                    vertical: 14,
+                                  ),
+                                  child: Row(
+                                    children: [
+                                      Expanded(
+                                        child: Text(
+                                          label,
+                                          style: const TextStyle(
+                                            fontWeight: FontWeight.w800,
+                                          ),
+                                        ),
+                                      ),
+                                      const Icon(
+                                        Icons.chevron_right_rounded,
+                                        color: teal,
+                                      ),
+                                    ],
+                                  ),
                                 ),
                               ),
                             ),
-                            const Icon(
-                              Icons.chevron_right_rounded,
-                              color: teal,
-                            ),
-                          ],
-                        ),
-                      ),
-                    ),
+                          ),
+                        );
+                      }).toList(),
                     ),
                   ),
-                );
-              }),
-              const SizedBox(height: 4),
-              TextButton(
-                onPressed: () => Navigator.of(ctx).pop(null),
-                child: const Text('Cancelar'),
-              ),
-            ],
+                ),
+                const SizedBox(height: 4),
+                TextButton(
+                  onPressed: () => Navigator.of(ctx).pop(null),
+                  child: const Text('Cancelar'),
+                ),
+              ],
+            ),
           ),
         ),
       );
@@ -1824,6 +1849,9 @@ class _AddChildSheetState extends State<_AddChildSheet> {
                         final value = (v ?? '').trim();
                         if (value.isEmpty) return 'Informe o nome';
                         if (value.length < 2) return 'Nome muito curto';
+                        if (!_namePattern.hasMatch(value)) {
+                          return 'O nome não pode conter números';
+                        }
                         return null;
                       },
                     ),
@@ -1831,13 +1859,19 @@ class _AddChildSheetState extends State<_AddChildSheet> {
                       controller: _ageController,
                       keyboardType: TextInputType.number,
                       textInputAction: TextInputAction.next,
+                      inputFormatters: [
+                        FilteringTextInputFormatter.digitsOnly,
+                        LengthLimitingTextInputFormatter(2),
+                      ],
                       decoration: const InputDecoration(labelText: 'Idade'),
                       validator: (v) {
                         final raw = (v ?? '').trim();
                         if (raw.isEmpty) return 'Informe a idade';
                         final age = int.tryParse(raw);
                         if (age == null) return 'Idade inválida';
-                        if (age < 0 || age > 25) return 'Idade inválida';
+                        if (age < 0 || age > 17) {
+                          return 'Idade deve ser entre 0 e 17 anos';
+                        }
                         return null;
                       },
                     ),
diff --git a/lib/quiz/quiz_question_screen.dart b/lib/quiz/quiz_question_screen.dart
index 3adad32..85a5fb0 100644
--- a/lib/quiz/quiz_question_screen.dart
+++ b/lib/quiz/quiz_question_screen.dart
@@ -1,6 +1,7 @@
 import 'dart:math' as math;
 
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:lottie/lottie.dart';
 
 import '../screens/video_screen.dart';
@@ -65,6 +66,11 @@ class QuizQuestionScreen extends StatefulWidget {
 }
 
 class _QuizQuestionScreenState extends State<QuizQuestionScreen> {
+  // Uma criança não tem, na prática, mais do que ~20 dentes numa arcada
+  // (dentição decídua + permanente em transição já é um caso extremo).
+  // Serve para barrar valores absurdos como "400".
+  static const int _maxTeethCount = 20;
+
   int? _selected;
   TextEditingController? _numberController;
   int? _numberValue;
@@ -89,7 +95,11 @@ class _QuizQuestionScreenState extends State<QuizQuestionScreen> {
     final size = MediaQuery.sizeOf(context);
     bool canProceed = _selected != null && !_navigating;
     if (widget.answerType == QuizAnswerType.number) {
-      canProceed = _numberValue != null && _numberValue! >= 0 && !_navigating;
+      canProceed =
+          _numberValue != null &&
+          _numberValue! >= 0 &&
+          _numberValue! <= _maxTeethCount &&
+          !_navigating;
     }
 
     final bool hasSuggestedVideo =
@@ -551,6 +561,10 @@ class _QuizQuestionScreenState extends State<QuizQuestionScreen> {
               controller: _numberController,
               keyboardType: TextInputType.number,
               textAlign: TextAlign.center,
+              inputFormatters: [
+                FilteringTextInputFormatter.digitsOnly,
+                LengthLimitingTextInputFormatter(2),
+              ],
               style: const TextStyle(
                 fontSize: 24,
                 fontWeight: FontWeight.w900,
@@ -573,6 +587,18 @@ class _QuizQuestionScreenState extends State<QuizQuestionScreen> {
               },
             ),
           ),
+          if (_numberValue != null && _numberValue! > _maxTeethCount) ...[
+            const SizedBox(height: 10),
+            Text(
+              'Um número tão alto assim não é possível.\nO máximo é $_maxTeethCount.',
+              textAlign: TextAlign.center,
+              style: const TextStyle(
+                color: Color(0xFFFF55A7),
+                fontWeight: FontWeight.w700,
+                fontSize: 12,
+              ),
+            ),
+          ],
         ],
       ),
     );
diff --git a/lib/screens/curiosidade_screen.dart b/lib/screens/curiosidade_screen.dart
index a740d02..4f0d028 100644
--- a/lib/screens/curiosidade_screen.dart
+++ b/lib/screens/curiosidade_screen.dart
@@ -3,6 +3,7 @@ import 'dart:math' as math;
 import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 
+import '../widgets/app_gradients.dart';
 import '../widgets/entrance.dart';
 import '../widgets/tap_bounce.dart';
 
@@ -20,6 +21,9 @@ class CuriosidadeScreen extends StatelessWidget {
         backgroundColor: _teal,
         foregroundColor: Colors.white,
         elevation: 0,
+        flexibleSpace: Container(
+          decoration: const BoxDecoration(gradient: kAppBarGradient),
+        ),
         title: const Text(
           'Curiosidades',
           style: TextStyle(fontWeight: FontWeight.w900),
diff --git a/lib/screens/terms_screen.dart b/lib/screens/terms_screen.dart
index b6e7aec..9059d52 100644
--- a/lib/screens/terms_screen.dart
+++ b/lib/screens/terms_screen.dart
@@ -1,5 +1,7 @@
 import 'package:flutter/material.dart';
 
+import '../widgets/app_gradients.dart';
+
 class TermsScreen extends StatelessWidget {
   const TermsScreen({super.key});
 
@@ -13,6 +15,9 @@ class TermsScreen extends StatelessWidget {
         backgroundColor: _teal,
         foregroundColor: Colors.white,
         elevation: 0,
+        flexibleSpace: Container(
+          decoration: const BoxDecoration(gradient: kAppBarGradient),
+        ),
         title: const Text(
           'Termos de Serviço',
           style: TextStyle(fontWeight: FontWeight.w900),
diff --git a/lib/screens/video_screen.dart b/lib/screens/video_screen.dart
index 7172cbb..0057e91 100644
--- a/lib/screens/video_screen.dart
+++ b/lib/screens/video_screen.dart
@@ -6,6 +6,7 @@ import 'package:lottie/lottie.dart';
 import 'package:video_player/video_player.dart';
 import 'package:youtube_player_flutter/youtube_player_flutter.dart';
 
+import '../widgets/app_gradients.dart';
 import '../widgets/entrance.dart';
 import '../widgets/tap_bounce.dart';
 
@@ -110,8 +111,48 @@ final List<VideoData> videoList = [
   ),
 ];
 
-// Cache for video controllers to avoid re-initializing
+// Cache de controllers de vídeo, partilhado entre qualquer ecrã que mostre
+// uma prévia (grelha de vídeos e o cartão em destaque na Home). Como vários
+// widgets podem apontar para o mesmo controller ao mesmo tempo, mantemos uma
+// contagem de referências para só o libertar quando ninguém mais o usa.
 final Map<String, VideoPlayerController> _videoControllerCache = {};
+final Map<String, int> _videoControllerRefCounts = {};
+
+// Dispositivos (sobretudo emuladores) só suportam um número pequeno de
+// decodificadores de vídeo/áudio simultâneos. A grelha de vídeos pode ter
+// dezenas de prévias e o GridView constrói várias de uma vez ao rolar; sem
+// este limite, cada thumbnail tenta abrir o seu próprio decoder e o sistema
+// trava (era exatamente isto que causava o congelamento e perda de som ao
+// navegar por muitos vídeos). Acima do limite, a prévia simplesmente mostra
+// o ícone de play em vez do frame real do vídeo.
+const int _maxConcurrentThumbnailDecoders = 1;
+
+bool get _hasThumbnailDecoderSlot =>
+    _videoControllerCache.length < _maxConcurrentThumbnailDecoders;
+
+void _releaseVideoController(String path) {
+  final remaining = (_videoControllerRefCounts[path] ?? 0) - 1;
+  if (remaining > 0) {
+    _videoControllerRefCounts[path] = remaining;
+    return;
+  }
+  _videoControllerRefCounts.remove(path);
+  _videoControllerCache.remove(path)?.dispose();
+}
+
+/// Descarta TODOS os controllers de prévia em cache. Chamado antes de abrir
+/// um player real (dialog/fullscreen), que já precisa dos seus próprios
+/// decodificadores de vídeo e áudio — em dispositivos com pouca capacidade
+/// (sobretudo emuladores), manter qualquer prévia viva ao mesmo tempo é
+/// suficiente para esgotar os decodificadores e travar o aparelho.
+void _evictAllVideoControllers() {
+  _videoControllerRefCounts.clear();
+  final controllers = _videoControllerCache.values.toList();
+  _videoControllerCache.clear();
+  for (final controller in controllers) {
+    controller.dispose();
+  }
+}
 
 Future<void> showVideoPlayerDialog(BuildContext context, VideoData video) {
   if (video.youtubeId != null) {
@@ -156,11 +197,9 @@ class _VideoScreenState extends State<VideoScreen> {
   @override
   void dispose() {
     _searchController.dispose();
-    // Dispose all cached controllers
-    for (var controller in _videoControllerCache.values) {
-      controller.dispose();
-    }
-    _videoControllerCache.clear();
+    // Não descartamos o cache global aqui: outros widgets (como o cartão em
+    // destaque na Home) podem estar a usar os mesmos controllers. Cada
+    // [VideoThumbnail] liberta a sua própria referência ao ser desmontado.
     super.dispose();
   }
 
@@ -180,7 +219,11 @@ class _VideoScreenState extends State<VideoScreen> {
       appBar: AppBar(
         backgroundColor: VideoScreen._teal,
         foregroundColor: Colors.white,
+        surfaceTintColor: VideoScreen._teal,
         elevation: 0,
+        flexibleSpace: Container(
+          decoration: const BoxDecoration(gradient: kAppBarGradient),
+        ),
         title: const Text(
           'Videos Educativos',
           style: TextStyle(fontWeight: FontWeight.w900),
@@ -321,9 +364,18 @@ class VideoThumbnail extends StatefulWidget {
 class _VideoThumbnailState extends State<VideoThumbnail> {
   VideoPlayerController? _controller;
   bool _isInitialized = false;
+  bool _hasOwnRef = false;
 
   bool get _isYoutube => widget.video.youtubeId != null;
 
+  /// Verdadeiro quando outro widget descartou o controller que este
+  /// thumbnail estava a usar (ex.: ao abrir o player em dialog/fullscreen).
+  /// Nesse caso [_controller] deixou de ser o mesmo objeto guardado no
+  /// cache partilhado — nunca é seguro tocar num controller já disposed.
+  bool get _isControllerStale =>
+      _controller != null &&
+      _videoControllerCache[widget.video.videoPath] != _controller;
+
   @override
   void initState() {
     super.initState();
@@ -332,47 +384,62 @@ class _VideoThumbnailState extends State<VideoThumbnail> {
 
   Future<void> _initializeVideo() async {
     final path = widget.video.videoPath!;
-    // Check if controller exists in cache
-    if (_videoControllerCache.containsKey(path)) {
-      _controller = _videoControllerCache[path];
-      await _controller!.seekTo(const Duration(seconds: 2));
-      await _controller!.pause();
-      if (mounted) {
-        setState(() {
-          _isInitialized = true;
-        });
+    final cached = _videoControllerCache[path];
+    if (cached != null) {
+      _controller = cached;
+      _videoControllerRefCounts[path] =
+          (_videoControllerRefCounts[path] ?? 0) + 1;
+      _hasOwnRef = true;
+      try {
+        await cached.seekTo(const Duration(seconds: 2));
+        await cached.pause();
+        if (mounted) setState(() => _isInitialized = true);
+      } catch (_) {
+        // O controller partilhado foi descartado por outra tela entretanto;
+        // larga a referência inválida e cria um novo do zero.
+        _releaseOwnRef();
+        _controller = null;
+        if (mounted) await _createFreshController(path);
       }
       return;
     }
+    if (!_hasThumbnailDecoderSlot) {
+      // Já há decoders suficientes ativos noutras prévias; fica só com o
+      // ícone de play em vez de arriscar sobrecarregar o dispositivo.
+      if (mounted) setState(() => _isInitialized = false);
+      return;
+    }
+    await _createFreshController(path);
+  }
 
-    // Create new controller and cache it
-    _controller = VideoPlayerController.asset(path);
+  Future<void> _createFreshController(String path) async {
+    final controller = VideoPlayerController.asset(path);
+    _controller = controller;
     try {
-      await _controller!.initialize();
-      await _controller!.seekTo(const Duration(seconds: 2));
-      await _controller!.pause();
-      _videoControllerCache[path] = _controller!;
-      if (mounted) {
-        setState(() {
-          _isInitialized = true;
-        });
-      }
+      await controller.initialize();
+      await controller.seekTo(const Duration(seconds: 2));
+      await controller.pause();
+      _videoControllerCache[path] = controller;
+      _videoControllerRefCounts[path] =
+          (_videoControllerRefCounts[path] ?? 0) + 1;
+      _hasOwnRef = true;
+      if (mounted) setState(() => _isInitialized = true);
     } catch (e) {
-      if (mounted) {
-        setState(() {
-          _isInitialized = false;
-        });
-      }
+      if (mounted) setState(() => _isInitialized = false);
+    }
+  }
+
+  void _releaseOwnRef() {
+    final path = widget.video.videoPath;
+    if (_hasOwnRef && path != null) {
+      _releaseVideoController(path);
+      _hasOwnRef = false;
     }
   }
 
   @override
   void dispose() {
-    // Don't dispose cached controllers, they will be disposed when screen is disposed
-    if (_controller != null &&
-        !_videoControllerCache.containsKey(widget.video.videoPath)) {
-      _controller!.dispose();
-    }
+    _releaseOwnRef();
     super.dispose();
   }
 
@@ -406,6 +473,18 @@ class _VideoThumbnailState extends State<VideoThumbnail> {
         ),
       );
     }
+
+    if (_isControllerStale) {
+      // Não mexemos no controller antigo (pode já estar disposed); larga a
+      // referência e agenda uma reinicialização para o próximo frame.
+      _hasOwnRef = false;
+      _controller = null;
+      _isInitialized = false;
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        if (mounted) _initializeVideo();
+      });
+    }
+
     return _isInitialized && _controller != null
         ? ClipRRect(
             borderRadius: BorderRadius.circular(widget.borderRadius),
@@ -434,11 +513,10 @@ class _VideoButton extends StatelessWidget {
   final VideoData video;
 
   void _showVideoPlayer(BuildContext context, VideoData video) {
-    if (video.youtubeId == null &&
-        _videoControllerCache.containsKey(video.videoPath)) {
-      // Dispose the cached controller to avoid codec conflict with dialog controller
-      _videoControllerCache[video.videoPath]!.dispose();
-      _videoControllerCache.remove(video.videoPath);
+    if (video.youtubeId == null) {
+      // Liberta todos os decodificadores de prévia antes de abrir o player
+      // em dialog, que precisa dos seus próprios decoders de vídeo/áudio.
+      _evictAllVideoControllers();
     }
     showVideoPlayerDialog(context, video);
   }
@@ -696,6 +774,15 @@ class _VideoControlsState extends State<_VideoControls> {
     }
   }
 
+  void _seekBy(Duration offset) {
+    final position = widget.controller.value.position;
+    final duration = widget.controller.value.duration;
+    var target = position + offset;
+    if (target < Duration.zero) target = Duration.zero;
+    if (target > duration) target = duration;
+    widget.controller.seekTo(target);
+  }
+
   @override
   Widget build(BuildContext context) {
     return Container(
@@ -723,6 +810,15 @@ class _VideoControlsState extends State<_VideoControls> {
                 Row(
                   mainAxisAlignment: MainAxisAlignment.center,
                   children: [
+                    IconButton(
+                      icon: const Icon(
+                        Icons.replay_10_rounded,
+                        color: Colors.white,
+                      ),
+                      tooltip: 'Retroceder 10s',
+                      onPressed: () =>
+                          _seekBy(const Duration(seconds: -10)),
+                    ),
                     IconButton(
                       icon: Icon(
                         widget.controller.value.isPlaying
@@ -738,16 +834,20 @@ class _VideoControlsState extends State<_VideoControls> {
                         }
                       },
                     ),
+                    IconButton(
+                      icon: const Icon(
+                        Icons.forward_10_rounded,
+                        color: Colors.white,
+                      ),
+                      tooltip: 'Avançar 10s',
+                      onPressed: () => _seekBy(const Duration(seconds: 10)),
+                    ),
                     IconButton(
                       icon: const Icon(Icons.fullscreen, color: Colors.white),
                       onPressed: () {
-                        // Dispose the cached controller to avoid codec conflict with fullscreen controller
-                        if (_videoControllerCache.containsKey(
-                          widget.videoPath,
-                        )) {
-                          _videoControllerCache[widget.videoPath]!.dispose();
-                          _videoControllerCache.remove(widget.videoPath);
-                        }
+                        // Liberta todos os decodificadores de prévia antes
+                        // de abrir o player em fullscreen.
+                        _evictAllVideoControllers();
                         Navigator.of(context).pop();
                         Navigator.of(context).push(
                           MaterialPageRoute(
@@ -826,6 +926,15 @@ class _FullscreenVideoPlayerState extends State<_FullscreenVideoPlayer> {
     }
   }
 
+  void _seekBy(Duration offset) {
+    final position = _controller.value.position;
+    final duration = _controller.value.duration;
+    var target = position + offset;
+    if (target < Duration.zero) target = Duration.zero;
+    if (target > duration) target = duration;
+    _controller.seekTo(target);
+  }
+
   @override
   void dispose() {
     SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]);
@@ -854,20 +963,49 @@ class _FullscreenVideoPlayerState extends State<_FullscreenVideoPlayer> {
         mainAxisSize: MainAxisSize.min,
         children: [
           if (_isInitialized)
-            FloatingActionButton(
-              heroTag: 'play_pause',
-              backgroundColor: VideoScreen._teal,
-              onPressed: () {
-                if (_controller.value.isPlaying) {
-                  _controller.pause();
-                } else {
-                  _controller.play();
-                }
-              },
-              child: Icon(
-                _controller.value.isPlaying ? Icons.pause : Icons.play_arrow,
-                color: Colors.white,
-              ),
+            Row(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                FloatingActionButton(
+                  heroTag: 'rewind',
+                  mini: true,
+                  backgroundColor: VideoScreen._teal,
+                  onPressed: () => _seekBy(const Duration(seconds: -10)),
+                  child: const Icon(
+                    Icons.replay_10_rounded,
+                    color: Colors.white,
+                  ),
+                ),
+                const SizedBox(width: 16),
+                FloatingActionButton(
+                  heroTag: 'play_pause',
+                  backgroundColor: VideoScreen._teal,
+                  onPressed: () {
+                    if (_controller.value.isPlaying) {
+                      _controller.pause();
+                    } else {
+                      _controller.play();
+                    }
+                  },
+                  child: Icon(
+                    _controller.value.isPlaying
+                        ? Icons.pause
+                        : Icons.play_arrow,
+                    color: Colors.white,
+                  ),
+                ),
+                const SizedBox(width: 16),
+                FloatingActionButton(
+                  heroTag: 'forward',
+                  mini: true,
+                  backgroundColor: VideoScreen._teal,
+                  onPressed: () => _seekBy(const Duration(seconds: 10)),
+                  child: const Icon(
+                    Icons.forward_10_rounded,
+                    color: Colors.white,
+                  ),
+                ),
+              ],
             ),
           if (_isInitialized) const SizedBox(height: 16),
           FloatingActionButton(
diff --git a/lib/widgets/app_gradients.dart b/lib/widgets/app_gradients.dart
new file mode 100644
index 0000000..274337f
--- /dev/null
+++ b/lib/widgets/app_gradients.dart
@@ -0,0 +1,11 @@
+import 'package:flutter/material.dart';
+
+/// Gradiente usado em todas as app bars da aplicação — um destaque em verde
+/// vivo concentrado no canto superior direito, dissolvendo rapidamente para
+/// o teal da marca no resto da barra.
+const LinearGradient kAppBarGradient = LinearGradient(
+  begin: Alignment.topRight,
+  end: Alignment.bottomLeft,
+  colors: [Color(0xFF31C679), Color(0xFF2F9E94)],
+  stops: [0.0, 0.55],
+);