diff --git a/frontend/src/pages/Admin.jsx b/frontend/src/pages/Admin.jsx
index 2960852..9e4780e 100644
--- a/frontend/src/pages/Admin.jsx
+++ b/frontend/src/pages/Admin.jsx
@@ -236,8 +236,11 @@ export default function Admin() {
               </span>
             </div>
 
-            <form onSubmit={handleSaveGameSettings} className="mt-4 pt-4 border-t border-gray-200 flex flex-wrap items-end gap-3">
-              <div className="flex-1 min-w-[220px]">
+            <form
+  onSubmit={handleSaveGameSettings}
+  className="mt-4 pt-4 border-t border-gray-200 flex flex-col sm:flex-row sm:items-end gap-3"
+>
+              <div className="w-full sm:flex-1 sm:min-w-[220px]">
                 <label htmlFor="game-start" className="block text-xs font-medium text-gray-700 mb-1">
                   {stats.gameWindow.configured ? 'Corriger la date de début' : 'Date de début du jeu-concours'}
                 </label>
@@ -253,7 +256,7 @@ export default function Admin() {
               <button
                 type="submit"
                 disabled={settingsSaving || !startDateInput}
-                className="bg-[#006B6B] hover:bg-[#005959] disabled:opacity-50 text-white font-semibold px-4 py-2 rounded-lg transition-colors text-xs sm:text-sm"
+                className="w-full sm:w-auto bg-[#006B6B] hover:bg-[#005959] disabled:opacity-50 text-white font-semibold px-4 py-2 rounded-lg transition-colors text-xs sm:text-sm whitespace-nowrap"
               >
                 {settingsSaving ? 'Enregistrement…' : stats.gameWindow.configured ? 'Mettre à jour' : 'Lancer le jeu'}
               </button>