diff --git a/client/src/components/ResponsiveTasks.tsx b/client/src/components/ResponsiveTasks.tsx
new file mode 100644
index 0000000..76e8d84
--- /dev/null
+++ b/client/src/components/ResponsiveTasks.tsx
@@ -0,0 +1,19 @@
+/**
+ * ResponsiveTasks - Wrapper component that automatically detects screen size
+ * and renders either the mobile or desktop version of the Tasks page.
+ */
+import { useScreenSize } from "@/hooks/use-screen-size";
+import Tasks from "@/pages/Tasks";
+import MobileTasksPage from "@/pages/mobile/TasksPage";
+
+export default function ResponsiveTasks() {
+    const { isMobile } = useScreenSize();
+
+    // Render mobile version for screens < 768px
+    if (isMobile) {
+        return <MobileTasksPage />;
+    }
+
+    // Render desktop version for larger screens
+    return <Tasks />;
+}
diff --git a/client/src/components/RouterProduction.tsx b/client/src/components/RouterProduction.tsx
index 421731e..10b18a3 100644
--- a/client/src/components/RouterProduction.tsx
+++ b/client/src/components/RouterProduction.tsx
@@ -20,6 +20,7 @@ import DlcPage from "@/pages/DlcPage";
 import BackupManager from "@/pages/BackupManager";
 import Utilities from "@/pages/Utilities";
 import Tasks from "@/pages/Tasks";
+import ResponsiveTasks from "@/components/ResponsiveTasks";
 import SavTickets from "@/pages/SavTickets";
 import Avoirs from "@/pages/Avoirs";
 import WeatherSettings from "@/pages/WeatherSettings";
@@ -30,7 +31,7 @@ import Layout from "@/components/Layout";
 
 function RouterProduction() {
   const { isAuthenticated, isLoading, user, environment, error } = useAuthUnified();
-  
+
   // Debug uniquement en développement
   if (import.meta.env.DEV) {
     console.log('🔍 RouterProduction Debug:', {
@@ -43,7 +44,7 @@ function RouterProduction() {
       error: error?.message
     });
   }
-  
+
   // Debug minimal basé sur l'environnement
   if (environment === 'production' && error && import.meta.env.DEV) {
     console.error('🚨 Production Auth Error:', error);
@@ -76,7 +77,7 @@ function RouterProduction() {
         </div>
       );
     }
-    
+
     return (
       <Switch>
         <Route path="/auth" component={AuthPage} />
@@ -102,19 +103,19 @@ function RouterProduction() {
         <Route path="/customer-orders" component={CustomerOrders} />
         <Route path="/dlc" component={DlcPage} />
         <Route path="/utilities" component={Utilities} />
-        <Route path="/tasks" component={Tasks} />
+        <Route path="/tasks" component={ResponsiveTasks} />
         <Route path="/sav" component={SavTickets} />
         <Route path="/avoirs" component={Avoirs} />
         <Route path="/analytics" component={Analytics} />
         <Route path="/sales-analysis" component={SalesAnalysisPage} />
         <Route path="/payment-schedule" component={PaymentSchedulePage} />
-        
+
         {/* Routes de compatibilité - redirection vers utilities */}
         <Route path="/backup" component={Utilities} />
         <Route path="/nocodb-config" component={Utilities} />
         <Route path="/database-debug" component={Utilities} />
         <Route path="/weather-settings" component={Utilities} />
-        
+
         {/* Redirection depuis /auth vers dashboard après authentification */}
         <Route path="/auth">
           {() => {
@@ -127,7 +128,7 @@ function RouterProduction() {
             return <Dashboard />;
           }}
         </Route>
-        
+
         <Route path="/" component={Dashboard} />
         <Route component={NotFound} />
       </Switch>
diff --git a/client/src/pages/mobile/TasksPage.tsx b/client/src/pages/mobile/TasksPage.tsx
new file mode 100644
index 0000000..c5544f6
--- /dev/null
+++ b/client/src/pages/mobile/TasksPage.tsx
@@ -0,0 +1,472 @@
+import { useState, useEffect } from "react";
+import { useQuery, useQueryClient } from "@tanstack/react-query";
+import { useAuthUnified } from "@/hooks/useAuthUnified";
+import { useStore } from "@/contexts/StoreContext";
+import { useToast } from "@/hooks/use-toast";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Badge } from "@/components/ui/badge";
+import { Card, CardContent } from "@/components/ui/card";
+import {
+    ListTodo,
+    Plus,
+    Search,
+    CheckCircle,
+    Edit,
+    Trash2,
+    Calendar,
+    AlertTriangle,
+    Clock,
+    Circle,
+    X
+} from "lucide-react";
+import { format, isPast, differenceInDays, isToday } from "date-fns";
+import { fr } from "date-fns/locale";
+import type { Task } from "@shared/schema";
+
+type TaskWithRelations = Task & {
+    assignedUser?: { id: string; username: string; firstName?: string; lastName?: string; };
+    creator?: { id: string; username: string; firstName?: string; lastName?: string; };
+    group?: { id: number; name: string; color: string; };
+    isFutureTask?: boolean;
+};
+
+// Mobile Task Form Component
+function MobileTaskForm({ task, onClose, selectedStoreId, user }: any) {
+    const { toast } = useToast();
+    const [isSubmitting, setIsSubmitting] = useState(false);
+
+    const handleSubmit = async (e: React.FormEvent<HTMLFormElement>) => {
+        e.preventDefault();
+        setIsSubmitting(true);
+
+        const formData = new FormData(e.currentTarget);
+        const title = formData.get('title') as string;
+        const description = formData.get('description') as string;
+        const priority = formData.get('priority') as string;
+        const assignedTo = formData.get('assignedTo') as string;
+        const dueDate = formData.get('dueDate') as string;
+
+        if (!title?.trim()) {
+            toast({ title: "Erreur", description: "Le titre est requis", variant: "destructive" });
+            setIsSubmitting(false);
+            return;
+        }
+
+        try {
+            const taskData = {
+                title: title.trim(),
+                description: description?.trim() || "",
+                priority: priority || "medium",
+                status: task?.status || "pending",
+                assignedTo: assignedTo?.trim() || "Non assigné",
+                dueDate: dueDate || null,
+            };
+
+            const url = task ? `/api/tasks/${task.id}` : '/api/tasks';
+            const method = task ? 'PUT' : 'POST';
+
+            if (!task) {
+                (taskData as any).groupId = selectedStoreId ? parseInt(selectedStoreId.toString()) : 1;
+                (taskData as any).createdBy = user?.username || 'admin';
+            }
+
+            const response = await fetch(url, {
+                method,
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify(taskData),
+            });
+
+            if (!response.ok) throw new Error(`Erreur ${response.status}`);
+
+            toast({
+                title: "Succès",
+                description: task ? "Tâche modifiée" : "Tâche créée",
+            });
+            window.location.reload();
+
+        } catch (error) {
+            toast({ title: "Erreur", description: "Erreur lors de l'opération", variant: "destructive" });
+            setIsSubmitting(false);
+        }
+    };
+
+    return (
+        <div className="fixed inset-0 bg-white z-50 flex flex-col">
+            {/* Header */}
+            <div className="flex items-center justify-between p-4 border-b bg-white sticky top-0">
+                <h2 className="text-lg font-semibold">{task ? "Modifier" : "Nouvelle tâche"}</h2>
+                <Button variant="ghost" size="icon" onClick={onClose}>
+                    <X className="w-5 h-5" />
+                </Button>
+            </div>
+
+            {/* Form */}
+            <form onSubmit={handleSubmit} className="flex-1 overflow-auto p-4 space-y-4">
+                <div>
+                    <label className="text-sm font-medium mb-2 block">Titre *</label>
+                    <Input
+                        name="title"
+                        defaultValue={task?.title || ""}
+                        placeholder="Titre de la tâche"
+                        required
+                        className="h-12 text-base"
+                    />
+                </div>
+
+                <div>
+                    <label className="text-sm font-medium mb-2 block">Description</label>
+                    <textarea
+                        name="description"
+                        defaultValue={task?.description || ""}
+                        placeholder="Description (optionnel)"
+                        rows={3}
+                        className="w-full p-3 border rounded-md text-base resize-none"
+                    />
+                </div>
+
+                <div>
+                    <label className="text-sm font-medium mb-2 block">Priorité</label>
+                    <select
+                        name="priority"
+                        defaultValue={task?.priority || "medium"}
+                        className="w-full h-12 p-3 border rounded-md text-base bg-white"
+                    >
+                        <option value="low">🟢 Faible</option>
+                        <option value="medium">🟡 Moyenne</option>
+                        <option value="high">🔴 Élevée</option>
+                    </select>
+                </div>
+
+                <div>
+                    <label className="text-sm font-medium mb-2 block">Date d'échéance</label>
+                    <Input
+                        name="dueDate"
+                        type="date"
+                        defaultValue={task?.dueDate ? new Date(task.dueDate).toISOString().split('T')[0] : ""}
+                        className="h-12 text-base"
+                    />
+                </div>
+
+                <div>
+                    <label className="text-sm font-medium mb-2 block">Assigné à</label>
+                    <Input
+                        name="assignedTo"
+                        defaultValue={task?.assignedTo || ""}
+                        placeholder="Nom de la personne"
+                        className="h-12 text-base"
+                    />
+                </div>
+
+                {/* Submit Button - Fixed at bottom */}
+                <div className="pt-4 pb-safe">
+                    <Button
+                        type="submit"
+                        disabled={isSubmitting}
+                        className="w-full h-14 text-base font-semibold bg-blue-600 hover:bg-blue-700"
+                    >
+                        {isSubmitting ? "..." : (task ? "Modifier" : "Créer la tâche")}
+                    </Button>
+                </div>
+            </form>
+        </div>
+    );
+}
+
+// Task Card Component
+function TaskCard({
+    task,
+    onComplete,
+    onEdit,
+    onDelete,
+    canEdit
+}: {
+    task: TaskWithRelations;
+    onComplete: () => void;
+    onEdit: () => void;
+    onDelete: () => void;
+    canEdit: boolean;
+}) {
+    const getPriorityConfig = (priority: string) => {
+        switch (priority) {
+            case 'high': return { color: 'bg-red-100 text-red-700 border-red-200', icon: AlertTriangle, label: 'Élevée' };
+            case 'medium': return { color: 'bg-yellow-100 text-yellow-700 border-yellow-200', icon: Clock, label: 'Moyenne' };
+            case 'low': return { color: 'bg-green-100 text-green-700 border-green-200', icon: Circle, label: 'Faible' };
+            default: return { color: 'bg-gray-100 text-gray-700 border-gray-200', icon: Circle, label: 'Moyenne' };
+        }
+    };
+
+    const getDueDateInfo = () => {
+        if (!task.dueDate || task.status === 'completed') return null;
+        const due = new Date(task.dueDate);
+        const daysDiff = differenceInDays(due, new Date());
+
+        if (isPast(due) && !isToday(due)) {
+            return { text: `En retard (${Math.abs(daysDiff)}j)`, color: 'text-red-600' };
+        } else if (isToday(due)) {
+            return { text: "Aujourd'hui", color: 'text-orange-600' };
+        } else if (daysDiff <= 3) {
+            return { text: `Dans ${daysDiff}j`, color: 'text-yellow-600' };
+        }
+        return { text: format(due, 'dd/MM', { locale: fr }), color: 'text-gray-500' };
+    };
+
+    const priority = getPriorityConfig(task.priority);
+    const PriorityIcon = priority.icon;
+    const dueDateInfo = getDueDateInfo();
+    const isCompleted = task.status === 'completed';
+
+    return (
+        <Card className={`mb-3 ${isCompleted ? 'opacity-60' : ''}`}>
+            <CardContent className="p-4">
+                {/* Header: Priority + Due Date */}
+                <div className="flex items-center justify-between mb-2">
+                    <Badge className={`${priority.color} border text-xs`}>
+                        <PriorityIcon className="w-3 h-3 mr-1" />
+                        {priority.label}
+                    </Badge>
+                    {dueDateInfo && (
+                        <span className={`text-xs font-medium ${dueDateInfo.color}`}>
+                            <Calendar className="w-3 h-3 inline mr-1" />
+                            {dueDateInfo.text}
+                        </span>
+                    )}
+                </div>
+
+                {/* Title */}
+                <h3 className={`font-semibold text-base mb-1 ${isCompleted ? 'line-through text-gray-500' : ''}`}>
+                    {task.title}
+                </h3>
+
+                {/* Description */}
+                {task.description && (
+                    <p className="text-sm text-gray-600 mb-3 line-clamp-2">{task.description}</p>
+                )}
+
+                {/* Assigned To */}
+                {task.assignedTo && (
+                    <p className="text-xs text-gray-500 mb-3">👤 {task.assignedTo}</p>
+                )}
+
+                {/* Actions */}
+                <div className="flex items-center gap-2 pt-2 border-t">
+                    {!isCompleted && (
+                        <Button
+                            variant="outline"
+                            size="sm"
+                            onClick={onComplete}
+                            className="flex-1 h-10 text-green-600 border-green-200 hover:bg-green-50"
+                        >
+                            <CheckCircle className="w-4 h-4 mr-1" />
+                            Terminer
+                        </Button>
+                    )}
+                    {canEdit && (
+                        <>
+                            <Button variant="outline" size="sm" onClick={onEdit} className="h-10 px-3">
+                                <Edit className="w-4 h-4" />
+                            </Button>
+                            <Button variant="outline" size="sm" onClick={onDelete} className="h-10 px-3 text-red-600 border-red-200 hover:bg-red-50">
+                                <Trash2 className="w-4 h-4" />
+                            </Button>
+                        </>
+                    )}
+                </div>
+            </CardContent>
+        </Card>
+    );
+}
+
+// Main Mobile Tasks Page
+export default function MobileTasksPage() {
+    const { user } = useAuthUnified();
+    const { selectedStoreId } = useStore();
+    const { toast } = useToast();
+    const queryClient = useQueryClient();
+
+    const [searchTerm, setSearchTerm] = useState("");
+    const [activeTab, setActiveTab] = useState<'all' | 'pending' | 'completed'>('pending');
+    const [showForm, setShowForm] = useState(false);
+    const [editingTask, setEditingTask] = useState<TaskWithRelations | null>(null);
+    const [deletingTask, setDeletingTask] = useState<TaskWithRelations | null>(null);
+
+    // Fetch tasks
+    const { data: tasks = [], isLoading } = useQuery({
+        queryKey: ["/api/tasks", selectedStoreId],
+        queryFn: async () => {
+            const params = new URLSearchParams();
+            if (selectedStoreId) params.append('storeId', selectedStoreId.toString());
+
+            const response = await fetch(`/api/tasks?${params.toString()}`, { credentials: 'include' });
+            if (!response.ok) throw new Error('Erreur chargement');
+
+            const data = await response.json();
+            return Array.isArray(data) ? data.filter((t: any) => t && t.id) : [];
+        },
+        enabled: !!user,
+    });
+
+    // Filter tasks
+    const filteredTasks = tasks
+        .filter((task: TaskWithRelations) => {
+            // Tab filter
+            if (activeTab === 'pending' && task.status === 'completed') return false;
+            if (activeTab === 'completed' && task.status !== 'completed') return false;
+
+            // Search filter
+            if (searchTerm && !task.title.toLowerCase().includes(searchTerm.toLowerCase())) {
+                return false;
+            }
+            return true;
+        })
+        .sort((a: TaskWithRelations, b: TaskWithRelations) => {
+            // Pending first, then by priority
+            if (a.status !== b.status) return a.status === 'pending' ? -1 : 1;
+            const priorityOrder = { high: 3, medium: 2, low: 1 };
+            return (priorityOrder[b.priority as keyof typeof priorityOrder] || 2) -
+                (priorityOrder[a.priority as keyof typeof priorityOrder] || 2);
+        });
+
+    // Handlers
+    const handleComplete = async (taskId: number) => {
+        try {
+            await fetch(`/api/tasks/${taskId}/complete`, {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                credentials: 'include',
+                body: JSON.stringify({}),
+            });
+            queryClient.invalidateQueries({ queryKey: ["/api/tasks"] });
+            toast({ title: "✅ Tâche terminée" });
+        } catch (error) {
+            toast({ title: "Erreur", variant: "destructive" });
+        }
+    };
+
+    const handleDelete = async () => {
+        if (!deletingTask) return;
+        try {
+            await fetch(`/api/tasks/${deletingTask.id}`, { method: 'DELETE', credentials: 'include' });
+            queryClient.invalidateQueries({ queryKey: ["/api/tasks"] });
+            toast({ title: "🗑️ Tâche supprimée" });
+            setDeletingTask(null);
+        } catch (error) {
+            toast({ title: "Erreur", variant: "destructive" });
+        }
+    };
+
+    const canEdit = user?.role === 'admin' || user?.role === 'manager' || user?.role === 'directeur';
+
+    // Loading
+    if (isLoading) {
+        return (
+            <div className="flex items-center justify-center h-screen">
+                <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-blue-600" />
+            </div>
+        );
+    }
+
+    return (
+        <div className="min-h-screen bg-gray-50 pb-24">
+            {/* Header */}
+            <div className="bg-white border-b sticky top-0 z-40">
+                <div className="p-4">
+                    <div className="flex items-center justify-between mb-4">
+                        <div className="flex items-center gap-2">
+                            <ListTodo className="w-6 h-6 text-blue-600" />
+                            <h1 className="text-xl font-bold">Tâches</h1>
+                        </div>
+                        <Badge variant="secondary">{filteredTasks.length}</Badge>
+                    </div>
+
+                    {/* Search */}
+                    <div className="relative mb-3">
+                        <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-gray-400" />
+                        <Input
+                            placeholder="Rechercher..."
+                            value={searchTerm}
+                            onChange={(e) => setSearchTerm(e.target.value)}
+                            className="pl-10 h-11"
+                        />
+                    </div>
+
+                    {/* Tabs */}
+                    <div className="flex gap-2">
+                        {(['pending', 'completed', 'all'] as const).map((tab) => (
+                            <Button
+                                key={tab}
+                                variant={activeTab === tab ? 'default' : 'outline'}
+                                size="sm"
+                                onClick={() => setActiveTab(tab)}
+                                className="flex-1 h-10"
+                            >
+                                {tab === 'pending' && 'En cours'}
+                                {tab === 'completed' && 'Terminées'}
+                                {tab === 'all' && 'Toutes'}
+                            </Button>
+                        ))}
+                    </div>
+                </div>
+            </div>
+
+            {/* Task List */}
+            <div className="p-4">
+                {filteredTasks.length === 0 ? (
+                    <div className="text-center py-12 text-gray-500">
+                        <ListTodo className="w-12 h-12 mx-auto mb-3 opacity-50" />
+                        <p>Aucune tâche trouvée</p>
+                    </div>
+                ) : (
+                    filteredTasks.map((task: TaskWithRelations) => (
+                        <TaskCard
+                            key={task.id}
+                            task={task}
+                            onComplete={() => handleComplete(task.id)}
+                            onEdit={() => { setEditingTask(task); setShowForm(true); }}
+                            onDelete={() => setDeletingTask(task)}
+                            canEdit={canEdit}
+                        />
+                    ))
+                )}
+            </div>
+
+            {/* FAB Button */}
+            {canEdit && (
+                <Button
+                    onClick={() => { setEditingTask(null); setShowForm(true); }}
+                    className="fixed bottom-20 right-4 w-14 h-14 rounded-full shadow-lg bg-blue-600 hover:bg-blue-700 z-40"
+                >
+                    <Plus className="w-6 h-6" />
+                </Button>
+            )}
+
+            {/* Form Modal */}
+            {showForm && (
+                <MobileTaskForm
+                    task={editingTask}
+                    onClose={() => { setShowForm(false); setEditingTask(null); }}
+                    selectedStoreId={selectedStoreId}
+                    user={user}
+                />
+            )}
+
+            {/* Delete Confirmation */}
+            {deletingTask && (
+                <div className="fixed inset-0 bg-black/50 z-50 flex items-end">
+                    <div className="bg-white w-full rounded-t-xl p-4 pb-8">
+                        <h3 className="font-semibold text-lg mb-2">Supprimer cette tâche ?</h3>
+                        <p className="text-gray-600 mb-4">{deletingTask.title}</p>
+                        <div className="flex gap-3">
+                            <Button variant="outline" onClick={() => setDeletingTask(null)} className="flex-1 h-12">
+                                Annuler
+                            </Button>
+                            <Button variant="destructive" onClick={handleDelete} className="flex-1 h-12">
+                                Supprimer
+                            </Button>
+                        </div>
+                    </div>
+                </div>
+            )}
+        </div>
+    );
+}