diff --git a/frontend/lib/models/card_assets.dart b/frontend/lib/models/card_assets.dart
index c86b663..f046103 100644
--- a/frontend/lib/models/card_assets.dart
+++ b/frontend/lib/models/card_assets.dart
@@ -1,3 +1,5 @@
+import 'package:flutter/material.dart';
+
 enum CardColorVertical {
   red('assets/cards/card_red.png'),
   pink('assets/cards/card_pink.png'),
@@ -22,4 +24,14 @@ enum CardColorHorizontal {
 
   final String path;
   const CardColorHorizontal(this.path);
-} 
\ No newline at end of file
+
+  /// Taille intrinsèque des PNG `card_*_h` (~1024×512).
+  static const Size sourceSize = Size(1024, 512);
+
+  /// Facteur d’affichage : PNG ~2× → coins 9-slice en taille logique correcte.
+  static const double displayScale = 2.0;
+
+  /// 9-slice en pixels image : coins fixes, bords H/V + centre extensibles.
+  /// Même logique que extensible.png — sans fichier `.9.png` Android.
+  static const Rect centerSlice = Rect.fromLTRB(100, 90, 924, 422);
+}
diff --git a/frontend/lib/widgets/quotidien/cartes_feed.dart b/frontend/lib/widgets/quotidien/cartes_feed.dart
index e8b37b3..445905a 100644
--- a/frontend/lib/widgets/quotidien/cartes_feed.dart
+++ b/frontend/lib/widgets/quotidien/cartes_feed.dart
@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:google_fonts/google_fonts.dart';
+import 'package:p_tits_pas/models/card_assets.dart';
 import 'package:p_tits_pas/models/carte_bulle.dart';
 import 'package:p_tits_pas/services/api/cards_service.dart';
 import 'package:p_tits_pas/widgets/quotidien/quotidien_theme.dart';
@@ -287,14 +288,20 @@ class _BulleTile extends StatelessWidget {
     return Opacity(
       opacity: treated ? 0.55 : 1,
       child: Container(
-        constraints: const BoxConstraints(minHeight: 88),
+        constraints: const BoxConstraints(minHeight: 96),
         decoration: BoxDecoration(
           image: DecorationImage(
-            image: AssetImage(card.backgroundAsset),
+            image: AssetImage(
+              card.backgroundAsset,
+              scale: CardColorHorizontal.displayScale,
+            ),
+            // 9-slice dynamique : coins fixes, bords / centre étirés
+            // selon la taille réelle de la bulle (tout écran).
+            centerSlice: CardColorHorizontal.centerSlice,
             fit: BoxFit.fill,
           ),
         ),
-        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+        padding: const EdgeInsets.fromLTRB(20, 14, 20, 14),
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.stretch,
           children: [