diff --git a/app/missions/equipe/page.tsx b/app/missions/equipe/page.tsx
index d4dd4fa..fa77547 100644
--- a/app/missions/equipe/page.tsx
+++ b/app/missions/equipe/page.tsx
@@ -69,6 +69,10 @@ export default function EquipePage() {
     password: "",
     roles: [] as string[],
   });
+  
+  // New group dialog state
+  const [newGroupDialogOpen, setNewGroupDialogOpen] = useState(false);
+  const [newGroupName, setNewGroupName] = useState("");
 
   // Fetch data on mount
   useEffect(() => {
@@ -473,6 +477,43 @@ export default function EquipePage() {
     }
   };
 
+  const createGroup = async () => {
+    if (!newGroupName.trim()) {
+      toast({ title: "Erreur", description: "Le nom du groupe est requis", variant: "destructive" });
+      return;
+    }
+    
+    setActionLoading("new-group");
+    try {
+      const response = await fetch("/api/groups", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ name: newGroupName.trim() })
+      });
+      
+      if (!response.ok) {
+        const errorData = await response.json().catch(() => ({}));
+        throw new Error(errorData.message || "Failed to create group");
+      }
+      
+      const newGroup = await response.json();
+      setGroups(prev => [...prev, newGroup]);
+      setNewGroupDialogOpen(false);
+      setNewGroupName("");
+      toast({ title: "Succès", description: "Groupe créé" });
+      fetchData(); // Refresh data
+    } catch (error) {
+      console.error("Error creating group:", error);
+      toast({ 
+        title: "Erreur", 
+        description: error instanceof Error ? error.message : "Échec de la création", 
+        variant: "destructive" 
+      });
+    } finally {
+      setActionLoading(null);
+    }
+  };
+
   return (
     <div className="flex flex-col h-full w-full bg-white">
       {/* Header */}
@@ -595,6 +636,58 @@ export default function EquipePage() {
                 </DialogContent>
               </Dialog>
             )}
+            {activeTab === "groups" && (
+              <Dialog open={newGroupDialogOpen} onOpenChange={setNewGroupDialogOpen}>
+                <DialogTrigger asChild>
+                  <Button size="sm" className="h-9 bg-blue-600 hover:bg-blue-700 text-white">
+                    <Plus className="h-4 w-4 mr-2" />
+                    Créer un groupe
+                  </Button>
+                </DialogTrigger>
+                <DialogContent className="sm:max-w-[400px] bg-white">
+                  <DialogHeader>
+                    <DialogTitle className="text-gray-900">Nouveau groupe</DialogTitle>
+                  </DialogHeader>
+                  <div className="space-y-4 py-4">
+                    <div>
+                      <Label htmlFor="groupName" className="text-gray-900">Nom du groupe *</Label>
+                      <Input
+                        id="groupName"
+                        value={newGroupName}
+                        onChange={(e) => setNewGroupName(e.target.value)}
+                        className="mt-1 bg-white text-gray-900 border-gray-300"
+                        placeholder="Ex: Développeurs"
+                        required
+                      />
+                    </div>
+                    <div className="flex justify-end gap-2 pt-4">
+                      <Button
+                        variant="outline"
+                        onClick={() => {
+                          setNewGroupDialogOpen(false);
+                          setNewGroupName("");
+                        }}
+                        className="border-gray-300 text-gray-700 hover:bg-gray-50"
+                      >
+                        Annuler
+                      </Button>
+                      <Button
+                        onClick={createGroup}
+                        disabled={actionLoading === "new-group" || !newGroupName.trim()}
+                        className="bg-blue-600 hover:bg-blue-700 text-white"
+                      >
+                        {actionLoading === "new-group" ? (
+                          <Loader2 className="h-4 w-4 animate-spin mr-2" />
+                        ) : (
+                          <Check className="h-4 w-4 mr-2" />
+                        )}
+                        Créer
+                      </Button>
+                    </div>
+                  </div>
+                </DialogContent>
+              </Dialog>
+            )}
             <div className="relative">
               <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 h-4 w-4 text-gray-500" />
               <Input
@@ -1023,16 +1116,16 @@ export default function EquipePage() {
                   <div className="space-y-4">
                     {/* Current Members */}
                     <div>
-                      <label className="text-xs font-medium text-gray-600 mb-2 block">
+                      <label className="text-xs font-medium text-gray-900 mb-2 block">
                         Membres actuels ({groupMembers.length})
                       </label>
-                      <div className="max-h-40 overflow-y-auto space-y-1">
+                      <div className="max-h-40 overflow-y-auto space-y-1 border rounded-md p-2 bg-white">
                         {groupMembers.length === 0 ? (
-                          <p className="text-xs text-gray-400 py-2">Aucun membre</p>
+                          <p className="text-xs text-gray-500 py-2 text-center">Aucun membre</p>
                         ) : (
                           groupMembers.map(member => (
-                            <div key={member.id} className="flex items-center justify-between p-2 bg-gray-50 rounded-md">
-                              <span className="text-sm text-gray-700 truncate">
+                            <div key={member.id} className="flex items-center justify-between p-2 bg-gray-50 rounded-md hover:bg-gray-100 transition-colors">
+                              <span className="text-sm text-gray-900 font-medium truncate flex-1">
                                 {member.firstName} {member.lastName}
                               </span>
                               <Button
@@ -1040,12 +1133,13 @@ export default function EquipePage() {
                                 size="sm"
                                 onClick={() => removeMemberFromGroup(member.id)}
                                 disabled={actionLoading === member.id}
-                                className="h-6 w-6 p-0 hover:text-red-600"
+                                className="h-7 w-7 p-0 hover:bg-red-50 hover:text-red-600 text-gray-500"
+                                title="Retirer du groupe"
                               >
                                 {actionLoading === member.id ? (
-                                  <Loader2 className="h-3 w-3 animate-spin" />
+                                  <Loader2 className="h-4 w-4 animate-spin" />
                                 ) : (
-                                  <X className="h-3 w-3" />
+                                  <X className="h-4 w-4" />
                                 )}
                               </Button>
                             </div>
@@ -1056,16 +1150,16 @@ export default function EquipePage() {
                     
                     {/* Available Users */}
                     <div>
-                      <label className="text-xs font-medium text-gray-600 mb-2 block">
+                      <label className="text-xs font-medium text-gray-900 mb-2 block">
                         Ajouter des membres
                       </label>
-                      <div className="max-h-40 overflow-y-auto space-y-1">
+                      <div className="max-h-40 overflow-y-auto space-y-1 border rounded-md p-2 bg-white">
                         {availableUsers.length === 0 ? (
-                          <p className="text-xs text-gray-400 py-2">Tous les utilisateurs sont membres</p>
+                          <p className="text-xs text-gray-500 py-2 text-center">Tous les utilisateurs sont membres</p>
                         ) : (
                           availableUsers.map(user => (
-                            <div key={user.id} className="flex items-center justify-between p-2 bg-gray-50 rounded-md">
-                              <span className="text-sm text-gray-700 truncate">
+                            <div key={user.id} className="flex items-center justify-between p-2 bg-gray-50 rounded-md hover:bg-gray-100 transition-colors">
+                              <span className="text-sm text-gray-900 font-medium truncate flex-1">
                                 {user.firstName} {user.lastName}
                               </span>
                               <Button
@@ -1073,12 +1167,13 @@ export default function EquipePage() {
                                 size="sm"
                                 onClick={() => addMemberToGroup(user.id)}
                                 disabled={actionLoading === user.id}
-                                className="h-6 w-6 p-0 hover:text-green-600"
+                                className="h-7 w-7 p-0 hover:bg-green-50 hover:text-green-600 text-gray-500"
+                                title="Ajouter au groupe"
                               >
                                 {actionLoading === user.id ? (
-                                  <Loader2 className="h-3 w-3 animate-spin" />
+                                  <Loader2 className="h-4 w-4 animate-spin" />
                                 ) : (
-                                  <Plus className="h-3 w-3" />
+                                  <Plus className="h-4 w-4" />
                                 )}
                               </Button>
                             </div>