diff --git a/VERSION.txt b/VERSION.txt
index a46d739..299b2e2 100644
--- a/VERSION.txt
+++ b/VERSION.txt
@@ -1 +1 @@
-1.0.3 (e79ffee)
\ No newline at end of file
+1.3.5 (1b0ccc5)
\ No newline at end of file
diff --git a/blog/__init__.py b/blog/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/blog/admin.py b/blog/admin.py
new file mode 100644
index 0000000..8eb9366
--- /dev/null
+++ b/blog/admin.py
@@ -0,0 +1,8 @@
+from django.contrib import admin
+from .models import Post
+
+@admin.register(Post)
+class PostAdmin(admin.ModelAdmin):
+    list_display = ('name', 'tags', 'slug', 'created_at')
+    search_fields = ('name', 'tags')
+    prepopulated_fields = {"slug": ("name",)}
\ No newline at end of file
diff --git a/blog/apps.py b/blog/apps.py
new file mode 100644
index 0000000..7930587
--- /dev/null
+++ b/blog/apps.py
@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class BlogConfig(AppConfig):
+    name = 'blog'
diff --git a/blog/context_processor.py b/blog/context_processor.py
new file mode 100644
index 0000000..a1666a4
--- /dev/null
+++ b/blog/context_processor.py
@@ -0,0 +1,5 @@
+from .models import Post
+
+def posts_list(request):
+    posts = Post.objects.all()
+    return {'posts': posts}
\ No newline at end of file
diff --git a/blog/migrations/0001_initial.py b/blog/migrations/0001_initial.py
new file mode 100644
index 0000000..9c7c01b
--- /dev/null
+++ b/blog/migrations/0001_initial.py
@@ -0,0 +1,30 @@
+# Generated by Django 6.0 on 2025-12-15 14:58
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Post',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=200)),
+                ('tags', models.CharField(max_length=200)),
+                ('slug', models.SlugField()),
+                ('content', models.TextField()),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+            ],
+            options={
+                'verbose_name': 'Article',
+                'verbose_name_plural': 'Articles',
+            },
+        ),
+    ]
diff --git a/blog/migrations/0002_post_enable.py b/blog/migrations/0002_post_enable.py
new file mode 100644
index 0000000..bb99a9b
--- /dev/null
+++ b/blog/migrations/0002_post_enable.py
@@ -0,0 +1,18 @@
+# Generated by Django 6.0 on 2025-12-15 19:40
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('blog', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='post',
+            name='enable',
+            field=models.BooleanField(default=True),
+        ),
+    ]
diff --git a/blog/migrations/0003_post_description.py b/blog/migrations/0003_post_description.py
new file mode 100644
index 0000000..1d12e7e
--- /dev/null
+++ b/blog/migrations/0003_post_description.py
@@ -0,0 +1,18 @@
+# Generated by Django 6.0 on 2025-12-15 20:13
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('blog', '0002_post_enable'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='post',
+            name='description',
+            field=models.TextField(default='Courte description'),
+        ),
+    ]
diff --git a/blog/migrations/__init__.py b/blog/migrations/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/blog/models.py b/blog/models.py
new file mode 100644
index 0000000..387d847
--- /dev/null
+++ b/blog/models.py
@@ -0,0 +1,18 @@
+from django.db import models
+
+class Post(models.Model):
+    name = models.CharField(max_length=200)
+    tags = models.CharField(max_length=200)
+    slug = models.SlugField()
+    description = models.TextField(default="Courte description")
+    content = models.TextField()
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+    enable = models.BooleanField(default=True)
+
+    class Meta:
+        verbose_name = "Article"
+        verbose_name_plural = "Articles"
+
+    def __str__(self):
+        return self.name
\ No newline at end of file
diff --git a/blog/tests.py b/blog/tests.py
new file mode 100644
index 0000000..7ce503c
--- /dev/null
+++ b/blog/tests.py
@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.
diff --git a/blog/urls.py b/blog/urls.py
new file mode 100644
index 0000000..ef6ad01
--- /dev/null
+++ b/blog/urls.py
@@ -0,0 +1,8 @@
+from django.urls import path
+from . import views
+
+app_name = 'blog'
+urlpatterns = [
+    path('', views.blog_home, name='blog'),
+    path('<str:slug>/', views.blog_view_post, name='post_detail'),
+]
\ No newline at end of file
diff --git a/blog/views.py b/blog/views.py
new file mode 100644
index 0000000..3db99b3
--- /dev/null
+++ b/blog/views.py
@@ -0,0 +1,11 @@
+from django.shortcuts import render
+
+from blog.models import Post
+
+
+def blog_home(request):
+    return render(request, 'blog/home.html')
+
+def blog_view_post(request, slug):
+    post = Post.objects.get(slug=slug)
+    return render(request, 'blog/details.html', {'post': post})
\ No newline at end of file
diff --git a/core/admin.py b/core/admin.py
index 7f53918..a9baff2 100644
--- a/core/admin.py
+++ b/core/admin.py
@@ -1,5 +1,5 @@
 from django.contrib import admin
-from .models import SiteSettings
+from .models import SiteSettings, Visit
 
 @admin.register(SiteSettings)
 class SiteSettingsAdmin(admin.ModelAdmin):
@@ -23,4 +23,14 @@ class SiteSettingsAdmin(admin.ModelAdmin):
         ('Contact', {
             'fields': ('contact_email',)
         }),
-    )
\ No newline at end of file
+        ('Blog', {
+            'fields': ('blog_title', 'blog_description')
+        }),
+    )
+
+
+@admin.register(Visit)
+class VisitAdmin(admin.ModelAdmin):
+    list_display = ("date", "visitor_id", "user", "source", "country", "first_seen", "last_seen")
+    list_filter = ("date", "country", "source")
+    search_fields = ("visitor_id", "referrer", "utm_source", "utm_medium", "utm_campaign")
diff --git a/core/middleware.py b/core/middleware.py
new file mode 100644
index 0000000..3e76796
--- /dev/null
+++ b/core/middleware.py
@@ -0,0 +1,117 @@
+import uuid
+from urllib.parse import urlparse
+from django.utils import timezone
+from .models import Visit
+
+
+class VisitTrackingMiddleware:
+    """Middleware très léger pour enregistrer des statistiques de visites.
+
+    - Assigne un cookie visiteur persistant (vid) si absent
+    - Enregistre/Met à jour une ligne Visit par visiteur et par jour
+    - Capture la source (UTM/referrer) et le pays si disponible via headers
+    """
+
+    COOKIE_NAME = 'vid'
+    COOKIE_MAX_AGE = 60 * 60 * 24 * 365 * 2  # 2 ans
+
+    def __init__(self, get_response):
+        self.get_response = get_response
+
+    def __call__(self, request):
+        vid = request.COOKIES.get(self.COOKIE_NAME)
+        if not vid:
+            vid = uuid.uuid4().hex
+
+        request.visitor_id = vid
+
+        # Enregistrer la visite (agrégée par jour)
+        try:
+            self._track(request, vid)
+        except Exception:
+            # On ne casse jamais la requête pour des stats
+            pass
+
+        response = self.get_response(request)
+        # S'assurer que le cookie est posé
+        if request.COOKIES.get(self.COOKIE_NAME) != vid:
+            response.set_cookie(
+                self.COOKIE_NAME,
+                vid,
+                max_age=self.COOKIE_MAX_AGE,
+                httponly=True,
+                samesite='Lax',
+            )
+        return response
+
+    def _track(self, request, vid):
+        # On ignore l'admin et les assets statiques
+        path = request.path
+        if path.startswith('/admin') or path.startswith('/static') or path.startswith('/staticfiles'):
+            return
+
+        now = timezone.now()
+        date = now.date()
+
+        ref = request.META.get('HTTP_REFERER', '')[:512]
+        utm_source = request.GET.get('utm_source', '')[:100]
+        utm_medium = request.GET.get('utm_medium', '')[:100]
+        utm_campaign = request.GET.get('utm_campaign', '')[:150]
+
+        # Déterminer source
+        source = ''
+        if utm_source:
+            source = utm_source
+        elif ref:
+            try:
+                netloc = urlparse(ref).netloc
+                source = netloc
+            except Exception:
+                source = ref[:150]
+
+        # Déterminer pays via en-têtes si fournis par proxy/CDN
+        country = (
+            request.META.get('HTTP_CF_IPCOUNTRY')
+            or request.META.get('HTTP_X_APPENGINE_COUNTRY')
+            or request.META.get('HTTP_X_COUNTRY')
+            or ''
+        )[:64]
+
+        became_user_at = now if request.user.is_authenticated else None
+        visit, created = Visit.objects.get_or_create(
+            visitor_id=vid,
+            date=date,
+            defaults={
+                'path': path[:512],
+                'referrer': ref,
+                'utm_source': utm_source,
+                'utm_medium': utm_medium,
+                'utm_campaign': utm_campaign,
+                'source': source,
+                'country': country,
+                'first_seen': now,
+                'last_seen': now,
+                'user': request.user if request.user.is_authenticated else None,
+                'became_user_at': became_user_at,
+            }
+        )
+
+        if not created:
+            # Mise à jour basique
+            dirty = False
+            if not visit.source and source:
+                visit.source = source
+                dirty = True
+            if not visit.country and country:
+                visit.country = country
+                dirty = True
+            if request.user.is_authenticated and visit.user_id is None:
+                visit.user = request.user
+                dirty = True
+                # Marquer la conversion si pas encore définie
+                if visit.became_user_at is None:
+                    visit.became_user_at = now
+            visit.last_seen = now
+            dirty = True
+            if dirty:
+                visit.save(update_fields=['source', 'country', 'user', 'became_user_at', 'last_seen'])
diff --git a/core/migrations/0002_sitesettings_blog_description_and_more.py b/core/migrations/0002_sitesettings_blog_description_and_more.py
new file mode 100644
index 0000000..7d669a8
--- /dev/null
+++ b/core/migrations/0002_sitesettings_blog_description_and_more.py
@@ -0,0 +1,23 @@
+# Generated by Django 6.0 on 2025-12-15 19:35
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='sitesettings',
+            name='blog_description',
+            field=models.TextField(blank=True),
+        ),
+        migrations.AddField(
+            model_name='sitesettings',
+            name='blog_title',
+            field=models.CharField(default='Mon Blog', max_length=200),
+        ),
+    ]
diff --git a/core/migrations/0003_alter_sitesettings_blog_description_and_more.py b/core/migrations/0003_alter_sitesettings_blog_description_and_more.py
new file mode 100644
index 0000000..ccfc1e0
--- /dev/null
+++ b/core/migrations/0003_alter_sitesettings_blog_description_and_more.py
@@ -0,0 +1,23 @@
+# Generated by Django 6.0 on 2025-12-15 19:40
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0002_sitesettings_blog_description_and_more'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='sitesettings',
+            name='blog_description',
+            field=models.TextField(blank=True, default='Je documente la construction de PartirDeZero.com : mes choix techniques, mes bugs résolus et mes conseils pour lancer tes propres projets web. Apprends en regardant faire.'),
+        ),
+        migrations.AlterField(
+            model_name='sitesettings',
+            name='blog_title',
+            field=models.CharField(default='Blog du développeur', max_length=200),
+        ),
+    ]
diff --git a/core/migrations/0004_visit.py b/core/migrations/0004_visit.py
new file mode 100644
index 0000000..6301e48
--- /dev/null
+++ b/core/migrations/0004_visit.py
@@ -0,0 +1,41 @@
+from django.db import migrations, models
+import django.db.models.deletion
+from django.conf import settings
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0003_alter_sitesettings_blog_description_and_more'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Visit',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('visitor_id', models.CharField(db_index=True, max_length=64)),
+                ('date', models.DateField(db_index=True)),
+                ('first_seen', models.DateTimeField(default=django.utils.timezone.now)),
+                ('last_seen', models.DateTimeField(default=django.utils.timezone.now)),
+                ('path', models.CharField(blank=True, max_length=512)),
+                ('referrer', models.CharField(blank=True, max_length=512)),
+                ('utm_source', models.CharField(blank=True, max_length=100)),
+                ('utm_medium', models.CharField(blank=True, max_length=100)),
+                ('utm_campaign', models.CharField(blank=True, max_length=150)),
+                ('source', models.CharField(blank=True, help_text='Domaine de provenance ou utm_source', max_length=150)),
+                ('country', models.CharField(blank=True, max_length=64)),
+                ('became_user_at', models.DateTimeField(blank=True, null=True)),
+                ('user', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='visits', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'ordering': ['-date', '-last_seen'],
+            },
+        ),
+        migrations.AlterUniqueTogether(
+            name='visit',
+            unique_together={('visitor_id', 'date')},
+        ),
+    ]
diff --git a/core/models.py b/core/models.py
index de47391..63d9b18 100644
--- a/core/models.py
+++ b/core/models.py
@@ -1,4 +1,6 @@
 from django.db import models
+from django.conf import settings
+from django.utils import timezone
 
 class SiteSettings(models.Model):
     site_name = models.CharField(max_length=200, default="Mon Super Site")
@@ -13,6 +15,10 @@ class SiteSettings(models.Model):
     linkedin_url = models.URLField(blank=True)
     github_url = models.URLField(blank=True)
 
+    # Blog
+    blog_title = models.CharField(max_length=200, default="Blog du développeur")
+    blog_description = models.TextField(blank=True, default="Je documente la construction de PartirDeZero.com : mes choix techniques, mes bugs résolus et mes conseils pour lancer tes propres projets web. Apprends en regardant faire.")
+
     # L'astuce pour qu'il n'y ait qu'un seul réglage
     def save(self, *args, **kwargs):
         self.pk = 1  # On force l'ID à 1. Si tu sauvegardes, ça écrase l'existant.
@@ -26,4 +32,36 @@ class SiteSettings(models.Model):
 
     class Meta:
         verbose_name = "Réglages du site"
-        verbose_name_plural = "Réglages du site"
\ No newline at end of file
+        verbose_name_plural = "Réglages du site"
+
+
+class Visit(models.Model):
+    """Enregistrement simplifié des visites (agrégées par jour et visiteur).
+
+    Objectif: fournir des stats de base sans dépendances externes.
+    """
+    visitor_id = models.CharField(max_length=64, db_index=True)
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL, null=True, blank=True, on_delete=models.SET_NULL, related_name='visits'
+    )
+    date = models.DateField(db_index=True)
+    first_seen = models.DateTimeField(default=timezone.now)
+    last_seen = models.DateTimeField(default=timezone.now)
+
+    path = models.CharField(max_length=512, blank=True)
+    referrer = models.CharField(max_length=512, blank=True)
+    utm_source = models.CharField(max_length=100, blank=True)
+    utm_medium = models.CharField(max_length=100, blank=True)
+    utm_campaign = models.CharField(max_length=150, blank=True)
+    source = models.CharField(max_length=150, blank=True, help_text="Domaine de provenance ou utm_source")
+    country = models.CharField(max_length=64, blank=True)
+
+    # Conversion: première fois où un visiteur devient utilisateur authentifié
+    became_user_at = models.DateTimeField(null=True, blank=True)
+
+    class Meta:
+        unique_together = ('visitor_id', 'date')
+        ordering = ['-date', '-last_seen']
+
+    def __str__(self):
+        return f"{self.visitor_id} @ {self.date}"
\ No newline at end of file
diff --git a/courses/migrations/0004_alter_course_options_alter_lesson_options.py b/courses/migrations/0004_alter_course_options_alter_lesson_options.py
new file mode 100644
index 0000000..ff801fb
--- /dev/null
+++ b/courses/migrations/0004_alter_course_options_alter_lesson_options.py
@@ -0,0 +1,21 @@
+# Generated by Django 6.0 on 2025-12-15 14:58
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('courses', '0003_comment_parent'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='course',
+            options={'verbose_name': 'Cours', 'verbose_name_plural': 'Cours'},
+        ),
+        migrations.AlterModelOptions(
+            name='lesson',
+            options={'verbose_name': 'Leçon', 'verbose_name_plural': 'Leçons'},
+        ),
+    ]
diff --git a/courses/models.py b/courses/models.py
index 3001eb5..3cc46d1 100644
--- a/courses/models.py
+++ b/courses/models.py
@@ -12,6 +12,10 @@ class Course(models.Model):
     updated_at = models.DateTimeField(auto_now=True)
     enable = models.BooleanField(default=True)
 
+    class Meta:
+        verbose_name = "Cours"
+        verbose_name_plural = "Cours"
+
     def __str__(self):
         return self.name
 
@@ -40,6 +44,10 @@ class Lesson(models.Model):
     is_premium = models.BooleanField(default=False)
     order = models.PositiveIntegerField()
 
+    class Meta:
+        verbose_name = "Leçon"
+        verbose_name_plural = "Leçons"
+
     def clean(self):
         # Remplacer les chevrons <?php et ?> par leurs équivalents HTML
         if self.content:
diff --git a/courses/templatetags/comment_format.py b/courses/templatetags/comment_format.py
index 2fbfd7e..64ea248 100644
--- a/courses/templatetags/comment_format.py
+++ b/courses/templatetags/comment_format.py
@@ -27,6 +27,19 @@ def _format_inline(text: str) -> str:
         lambda m: f"<code class=\"comment-code\">{m.group(1)}</code>",
         text,
     )
+    # H1
+    text = re.sub(r"^# (.+)$", r"<h1>\1</h1>", text, flags=re.MULTILINE)
+    # H2
+    text = re.sub(r"^## (.+)$", r"<h2>\1</h2>", text, flags=re.MULTILINE)
+    # H3
+    text = re.sub(r"^### (.+)$", r"<h3>\1</h3>", text, flags=re.MULTILINE)
+    # H4
+    text = re.sub(r"^#### (.+)$", r"<h4>\1</h4>", text, flags=re.MULTILINE)
+    # H5
+    text = re.sub(r"^##### (.+)$", r"<h5>\1</h5>", text, flags=re.MULTILINE)
+    # H6
+    text = re.sub(r"^###### (.+)$", r"<h6>\1</h6>", text, flags=re.MULTILINE)
+
     # bold **text**
     text = re.sub(
         r"\*\*([^*]+)\*\*",
diff --git a/courses/views.py b/courses/views.py
index b51bce0..ca9fb22 100644
--- a/courses/views.py
+++ b/courses/views.py
@@ -3,13 +3,14 @@ from django.urls import reverse
 from django.views import generic
 from django.db.models import Prefetch
 from .models import Course, Lesson, Module, Comment
+from progression.models import Progression
 from .forms import CommentForm
 
 def list_courses(request):
     courses = Course.objects.all()
     return render(request, 'courses/list.html', {'courses': courses})
 
-def show(request, course_id):
+def show(request, course_name, course_id):
     # Optimized course fetch with related author and profile (if present)
     course = get_object_or_404(
         Course.objects.select_related('author', 'author__profile'),
@@ -23,9 +24,23 @@ def show(request, course_id):
         .order_by('order')
     )
 
+    # Récupération de la progression de l'utilisateur sur le cours
+    user_progress = None
+    completed_lesson_ids = []  # On prépare une liste vide par défaut
+
+    if request.user.is_authenticated:
+        user_progress = Progression.objects.filter(user=request.user, course=course).first()
+
+        # 2. S'il y a une progression, on extrait juste les IDs des leçons finies
+        if user_progress:
+            # values_list renvoie une liste simple : [1, 5, 12] au lieu d'objets lourds
+            completed_lesson_ids = user_progress.completed_lessons.values_list('id', flat=True)
+
     context = {
         'course': course,
         'lessons': lessons,
+        'user_progress': user_progress,
+        'completed_lesson_ids': completed_lesson_ids,
     }
     return render(request, 'courses/show.html', context)
 
@@ -105,6 +120,18 @@ def lesson_detail(request, course_slug, module_slug, lesson_slug):
         .order_by('created_at')
     )
 
+    # Récupération de la progression de l'utilisateur sur le cours
+    user_progress = None
+    completed_lesson_ids = []  # On prépare une liste vide par défaut
+
+    if request.user.is_authenticated:
+        user_progress = Progression.objects.filter(user=request.user, course=course).first()
+
+        # 2. S'il y a une progression, on extrait juste les IDs des leçons finies
+        if user_progress:
+            # values_list renvoie une liste simple : [1, 5, 12] au lieu d'objets lourds
+            completed_lesson_ids = user_progress.completed_lessons.values_list('id', flat=True)
+
     context = {
         'course': course,
         'module': module,
@@ -114,5 +141,7 @@ def lesson_detail(request, course_slug, module_slug, lesson_slug):
         'comment_form': form,
         'prev_lesson': prev_lesson,
         'next_lesson': next_lesson,
+        'user_progress': user_progress,
+        'completed_lesson_ids': completed_lesson_ids,
     }
     return render(request, 'courses/lesson.html', context)
\ No newline at end of file
diff --git a/devart/settings.py b/devart/settings.py
index fa7d2d5..f846daa 100644
--- a/devart/settings.py
+++ b/devart/settings.py
@@ -12,6 +12,8 @@ https://docs.djangoproject.com/en/5.0/ref/settings/
 
 from pathlib import Path
 import os
+
+import dotenv
 from dotenv import load_dotenv
 
 import devart.context_processor
@@ -51,6 +53,8 @@ INSTALLED_APPS = [
     'core',
     'courses',
     'users',
+    'progression',
+    'blog',
 ]
 
 MIDDLEWARE = [
@@ -62,7 +66,7 @@ MIDDLEWARE = [
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
 
-    
+    'core.middleware.VisitTrackingMiddleware',
 ]
 
 ROOT_URLCONF = 'devart.urls'
@@ -81,6 +85,7 @@ TEMPLATES = [
                 'devart.context_processor.app_version',
                 'core.context_processor.site_settings',
                 'courses.context_processors.course_list',
+                'blog.context_processor.posts_list',
             ],
         },
     },
@@ -199,4 +204,12 @@ def get_git_version():
         else:
             return "Version inconnue (Fichier manquant)"
 
-GIT_VERSION = get_git_version()
\ No newline at end of file
+GIT_VERSION = get_git_version()
+
+EMAIL_BACKEND = dotenv.get_key('.env', 'EMAIL_BACKEND')
+EMAIL_HOST = dotenv.get_key('.env', 'EMAIL_HOST')
+EMAIL_PORT = dotenv.get_key('.env', 'EMAIL_PORT')
+EMAIL_USE_TLS = dotenv.get_key('.env', 'EMAIL_USE_TLS') == 'True'
+EMAIL_HOST_USER = dotenv.get_key('.env', 'EMAIL_HOST_USER')
+EMAIL_HOST_PASSWORD = dotenv.get_key('.env', 'EMAIL_HOST_PASSWORD')
+DEFAULT_FROM_EMAIL = EMAIL_HOST_USER
\ No newline at end of file
diff --git a/devart/sitemap.py b/devart/sitemap.py
index 05f4a77..e761d33 100644
--- a/devart/sitemap.py
+++ b/devart/sitemap.py
@@ -1,9 +1,10 @@
 from django.contrib import sitemaps
 from django.urls import reverse
 
-# --- IMPORTS DEPUIS TES DIFFÉRENTES FEATURES ---
+# --- FEATURES ---
 from courses.models import Course
 from users.models import Profile
+from blog.models import Post
 
 # --- SITEMAP : LES Cours ---
 class CourseSitemap(sitemaps.Sitemap):
@@ -17,6 +18,14 @@ class CourseSitemap(sitemaps.Sitemap):
         # Assure-toi que ton modèle Course a bien une méthode get_absolute_url
         return item.get_absolute_url()
 
+# --- SITEMAP : BLOG ---
+class BlogSitemap(sitemaps.Sitemap):
+    changefreq = "weekly"
+    priority = 0.8
+
+    def location(self, item):
+        return item.get_absolute_url()
+
 # --- SITEMAP : PAGES STATIQUES ---
 class StaticViewSitemap(sitemaps.Sitemap):
     priority = 0.5
@@ -26,4 +35,4 @@ class StaticViewSitemap(sitemaps.Sitemap):
         return ["home"] # Les noms de tes URLs
 
     def location(self, item):
-        return "https://partirdezero.com"
\ No newline at end of file
+        return ""
\ No newline at end of file
diff --git a/devart/urls.py b/devart/urls.py
index e198bae..17cb4e7 100644
--- a/devart/urls.py
+++ b/devart/urls.py
@@ -43,6 +43,8 @@ urlpatterns = [
     path('', include('home.urls')),
     path('courses/', include('courses.urls')),
     path('users/', include('users.urls')),
+    path('progression/', include('progression.urls')),
+    path('blog/', include('blog.urls')),
 
     path('sitemap.xml', sitemap, {'sitemaps': sitemaps_dict}, name='django.contrib.sitemaps.views.sitemap'),
     path('robots.txt', robots_txt),
diff --git a/home/urls.py b/home/urls.py
index a1ea3c1..1dbd960 100644
--- a/home/urls.py
+++ b/home/urls.py
@@ -5,4 +5,7 @@ app_name = 'home'
 urlpatterns = [
     path('', views.home, name='home'),
     path('premium/<int:course_id>', views.premium, name='premium'),
+    # Tableau de bord statistiques (réservé superadministrateurs)
+    path('dashboard/stats/', views.stats_dashboard, name='stats_dashboard'),
+    path('dashboard/stats/charts/', views.stats_charts, name='stats_charts'),
 ]
\ No newline at end of file
diff --git a/home/views.py b/home/views.py
index 5bd3838..ebd2cf2 100644
--- a/home/views.py
+++ b/home/views.py
@@ -1,5 +1,14 @@
 from django.shortcuts import render, get_object_or_404
-from courses.models import Course 
+from django.contrib.auth.decorators import user_passes_test
+from django.utils import timezone
+from django.db.models import Count
+from core.models import Visit
+from django.views.decorators.cache import cache_page
+from django.contrib.auth.models import User
+from courses.models import Course, Lesson
+from blog.models import Post
+from progression.models import Progression
+import json
 
 def home(request):
     courses = Course.objects.order_by('-created_at')[:6]
@@ -9,3 +18,278 @@ def premium(request, course_id):
     """Landing page présentant les avantages du Premium."""
     course = get_object_or_404(Course, pk=course_id)
     return render(request, 'premium.html', {'course': course})
+
+
+# 15 minutes de cache sur la page complète (sauf si décochée plus tard pour des blocs en direct)
+@user_passes_test(lambda u: u.is_superuser)
+@cache_page(60 * 15)
+def stats_dashboard(request):
+    """ Tableau de bord statistiques réservé aux superadministrateurs.
+    Périodes supportées: 7, 30, 90, 180 jours (GET param 'p'). """
+
+    # Période
+    period_options = [7, 30, 90, 180]
+    try:
+        p = int(request.GET.get('p', 30))
+    except ValueError:
+        p = 30
+    if p not in period_options:
+        p = 30
+
+    now = timezone.now()
+    start_dt = now - timezone.timedelta(days=p-1)  # inclut aujourd'hui
+
+    # Utilisateurs
+    total_users = User.objects.count()
+    new_users_qs = User.objects.filter(date_joined__date__gte=start_dt.date(), date_joined__date__lte=now.date())
+    # Séries quotidiennes nouveaux utilisateurs
+    new_users_by_day = (
+        new_users_qs
+        .extra(select={'day': "date(date_joined)"})
+        .values('day')
+        .annotate(c=Count('id'))
+    )
+
+    # Activité approximée via Progression mise à jour
+    active_users_qs = (
+        Progression.objects.filter(updated_at__date__gte=start_dt.date(), updated_at__date__lte=now.date())
+        .values('user').distinct()
+    )
+    active_users_count = active_users_qs.count()
+
+    # Cours
+    total_courses = Course.objects.count()
+    total_courses_enabled = Course.objects.filter(enable=True).count()
+    new_courses_by_day = (
+        Course.objects.filter(created_at__date__gte=start_dt.date(), created_at__date__lte=now.date())
+        .extra(select={'day': "date(created_at)"})
+        .values('day').annotate(c=Count('id'))
+    )
+
+    # Leçons
+    total_lessons = Lesson.objects.count()
+
+    # Achèvements de leçons (via table de liaison M2M)
+    through = Progression.completed_lessons.through
+    lesson_completions_by_day = (
+        through.objects.filter(
+            progression__updated_at__date__gte=start_dt.date(),
+            progression__updated_at__date__lte=now.date(),
+        )
+        .extra(select={'day': "date(progression_updated_at)"}) if 'progression_updated_at' in [f.name for f in through._meta.fields]
+        else through.objects.extra(select={'day': "date(created_at)"})  # fallback si champs créé n'existe pas
+    )
+    # Si la table M2M n'a pas de timestamps, on utilisera updated_at de Progression pour l'activité par jour
+    # donc on refait une série quotidienne d'activité progression
+    progress_activity_by_day = (
+        Progression.objects.filter(updated_at__date__gte=start_dt.date(), updated_at__date__lte=now.date())
+        .extra(select={'day': "date(updated_at)"})
+        .values('day').annotate(c=Count('id'))
+    )
+
+    # Blog
+    total_posts = Post.objects.count()
+    new_posts_by_day = (
+        Post.objects.filter(created_at__date__gte=start_dt.date(), created_at__date__lte=now.date())
+        .extra(select={'day': "date(created_at)"})
+        .values('day').annotate(c=Count('id'))
+    )
+
+    # Revenus/Paiements & Technique (placeholders faute de sources)
+    revenus_disponibles = False
+    technique_disponible = False
+
+    # Visites / Trafic
+    period_start_date = start_dt.date()
+    period_end_date = now.date()
+    period_visits = Visit.objects.filter(date__gte=period_start_date, date__lte=period_end_date)
+
+    unique_visitors = period_visits.values('visitor_id').distinct().count()
+
+    earlier_visitors_qs = Visit.objects.filter(date__lt=period_start_date).values('visitor_id').distinct()
+    returning_visitors = period_visits.filter(visitor_id__in=earlier_visitors_qs).values('visitor_id').distinct().count()
+
+    converted_visitors = (
+        period_visits
+        .filter(became_user_at__isnull=False, became_user_at__date__gte=period_start_date, became_user_at__date__lte=period_end_date)
+        .values('visitor_id').distinct().count()
+    )
+
+    top_sources_qs = (
+        period_visits
+        .values('source')
+        .annotate(c=Count('visitor_id', distinct=True))
+        .order_by('-c')
+    )
+    top_countries_qs = (
+        period_visits
+        .exclude(country='')
+        .values('country')
+        .annotate(c=Count('visitor_id', distinct=True))
+        .order_by('-c')
+    )
+
+    top_sources_table = [(row['source'] or 'Direct/Unknown', row['c']) for row in top_sources_qs[:10]]
+    top_countries_table = [(row['country'], row['c']) for row in top_countries_qs[:10]]
+
+    # Helper pour avoir toutes les dates de la période et remplir les trous
+    def build_series_dict(qs, date_key='day', count_key='c'):
+        counts = {str(item[date_key]): item[count_key] for item in qs}
+        days = []
+        values = []
+        d = start_dt.date()
+        while d <= now.date():
+            key = str(d)
+            days.append(key)
+            values.append(counts.get(key, 0))
+            d += timezone.timedelta(days=1)
+        return days, values
+
+    days_users, values_new_users = build_series_dict(new_users_by_day)
+    days_courses, values_new_courses = build_series_dict(new_courses_by_day)
+    days_posts, values_new_posts = build_series_dict(new_posts_by_day)
+    days_activity, values_activity = build_series_dict(progress_activity_by_day)
+
+    # Tables simples (jour, valeur)
+    new_users_table = list(zip(days_users, values_new_users))
+    new_courses_table = list(zip(days_courses, values_new_courses))
+
+    context = {
+        'period_options': period_options,
+        'p': p,
+        'start_date': start_dt.date(),
+        'end_date': now.date(),
+
+        # KPI
+        'kpi': {
+            'total_users': total_users,
+            'new_users_period': sum(values_new_users),
+            'active_users_period': active_users_count,
+            'unique_visitors': unique_visitors,
+            'returning_visitors': returning_visitors,
+            'converted_visitors': converted_visitors,
+            'total_courses': total_courses,
+            'courses_enabled': total_courses_enabled,
+            'total_lessons': total_lessons,
+            'total_posts': total_posts,
+        },
+
+        # Séries pour graphiques
+        'series': {
+            'days': days_users,  # mêmes intervalles pour tous
+            'new_users': values_new_users,
+            'new_courses': values_new_courses,
+            'new_posts': values_new_posts,
+            'activity_progress': values_activity,
+        },
+
+        # Disponibilité des sections
+        'revenus_disponibles': revenus_disponibles,
+        'technique_disponible': technique_disponible,
+
+        # Tables
+        'new_users_table': new_users_table,
+        'new_courses_table': new_courses_table,
+        'top_sources_table': top_sources_table,
+        'top_countries_table': top_countries_table,
+    }
+
+    # Sérialisation JSON pour Chart.js
+    context['series_json'] = json.dumps(context['series'])
+    context['labels_json'] = json.dumps(context['series']['days'])
+
+    return render(request, 'home/stats_dashboard.html', context)
+
+
+@user_passes_test(lambda u: u.is_superuser)
+@cache_page(60 * 15)
+def stats_charts(request):
+    """Page dédiée aux graphiques (réservée superadmins)."""
+    # Période
+    period_options = [7, 30, 90, 180]
+    try:
+        p = int(request.GET.get('p', 30))
+    except ValueError:
+        p = 30
+    if p not in period_options:
+        p = 30
+
+    now = timezone.now()
+    start_dt = now - timezone.timedelta(days=p-1)
+    period_start_date = start_dt.date()
+    period_end_date = now.date()
+
+    # Trafic par jour (visiteurs uniques)
+    visits_qs = (
+        Visit.objects
+        .filter(date__gte=period_start_date, date__lte=period_end_date)
+        .values('date')
+        .annotate(c=Count('visitor_id', distinct=True))
+        .order_by('date')
+    )
+
+    # Conversions par jour (visiteurs devenus utilisateurs)
+    conversions_qs = (
+        Visit.objects
+        .filter(
+            became_user_at__isnull=False,
+            became_user_at__date__gte=period_start_date,
+            became_user_at__date__lte=period_end_date,
+        )
+        .extra(select={'day': "date(became_user_at)"})
+        .values('day')
+        .annotate(c=Count('visitor_id', distinct=True))
+        .order_by('day')
+    )
+
+    def build_series_dict(qs, date_key='date', count_key='c'):
+        counts = {str(item[date_key]): item[count_key] for item in qs}
+        days = []
+        values = []
+        d = period_start_date
+        while d <= period_end_date:
+            key = str(d)
+            days.append(key)
+            values.append(counts.get(key, 0))
+            d += timezone.timedelta(days=1)
+        return days, values
+
+    labels, visitors_series = build_series_dict(visits_qs, date_key='date')
+    _, conversions_series = build_series_dict(conversions_qs, date_key='day')
+
+    # Sources & Pays (sur la période)
+    period_visits = Visit.objects.filter(date__gte=period_start_date, date__lte=period_end_date)
+    top_sources_qs = (
+        period_visits
+        .values('source')
+        .annotate(c=Count('visitor_id', distinct=True))
+        .order_by('-c')[:10]
+    )
+    top_countries_qs = (
+        period_visits
+        .exclude(country='')
+        .values('country')
+        .annotate(c=Count('visitor_id', distinct=True))
+        .order_by('-c')[:10]
+    )
+
+    sources_labels = [(row['source'] or 'Direct/Unknown') for row in top_sources_qs]
+    sources_values = [row['c'] for row in top_sources_qs]
+    countries_labels = [row['country'] for row in top_countries_qs]
+    countries_values = [row['c'] for row in top_countries_qs]
+
+    context = {
+        'period_options': period_options,
+        'p': p,
+        'start_date': period_start_date,
+        'end_date': period_end_date,
+        'labels_json': json.dumps(labels),
+        'visitors_series_json': json.dumps(visitors_series),
+        'conversions_series_json': json.dumps(conversions_series),
+        'sources_labels_json': json.dumps(sources_labels),
+        'sources_values_json': json.dumps(sources_values),
+        'countries_labels_json': json.dumps(countries_labels),
+        'countries_values_json': json.dumps(countries_values),
+    }
+
+    return render(request, 'home/stats_charts.html', context)
diff --git a/progression/__init__.py b/progression/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/progression/admin.py b/progression/admin.py
new file mode 100644
index 0000000..6dd7924
--- /dev/null
+++ b/progression/admin.py
@@ -0,0 +1,15 @@
+from django.contrib import admin
+from .models import Progression
+from courses.models import Course, Lesson
+
+@admin.register(Progression)
+class ProgressionAdmin(admin.ModelAdmin):
+    list_display = ('user', 'course', 'get_percent', 'updated_at')
+    list_filter = ('course', 'updated_at')
+    search_fields = ('user__username', 'course__name')
+
+    autocomplete_fields = ['course', 'completed_lessons']
+
+    def get_percent(self, obj):
+        return f"{obj.percent_completed}"
+    get_percent.short_description = 'Progression'
\ No newline at end of file
diff --git a/progression/apps.py b/progression/apps.py
new file mode 100644
index 0000000..7bf7a21
--- /dev/null
+++ b/progression/apps.py
@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class ProgressionConfig(AppConfig):
+    name = 'progression'
diff --git a/progression/migrations/0001_initial.py b/progression/migrations/0001_initial.py
new file mode 100644
index 0000000..f2023ef
--- /dev/null
+++ b/progression/migrations/0001_initial.py
@@ -0,0 +1,34 @@
+# Generated by Django 6.0 on 2025-12-15 14:25
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('courses', '0003_comment_parent'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Progression',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+                ('completed_lessons', models.ManyToManyField(blank=True, related_name='completed_by', to='courses.lesson')),
+                ('course', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='user_progress', to='courses.course')),
+                ('last_viewed_lesson', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='last_viewed_by', to='courses.lesson')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='progress', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name': 'Progression du cours',
+                'unique_together': {('user', 'course')},
+            },
+        ),
+    ]
diff --git a/progression/migrations/__init__.py b/progression/migrations/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/progression/models.py b/progression/models.py
new file mode 100644
index 0000000..d8002a8
--- /dev/null
+++ b/progression/models.py
@@ -0,0 +1,28 @@
+from django.db import models
+from django.conf import settings
+
+class Progression(models.Model):
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='progress')
+    course = models.ForeignKey('courses.Course', on_delete=models.CASCADE, related_name='user_progress')
+    completed_lessons = models.ManyToManyField('courses.Lesson', blank=True, related_name='completed_by')
+    last_viewed_lesson = models.ForeignKey('courses.Lesson', on_delete=models.SET_NULL, null=True, blank=True, related_name='last_viewed_by')
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        unique_together = ('user', 'course')
+        verbose_name = "Progression du cours"
+
+    def __str__(self):
+        return f"{self.user} - {self.course.name}"
+
+    @property
+    def percent_completed(self):
+        from courses.models import Lesson
+        total_lessons = Lesson.objects.filter(module__course=self.course).count()
+        if total_lessons == 0:
+            return 0
+
+        completed_lessons = self.completed_lessons.count()
+
+        return int((completed_lessons / total_lessons) * 100)
\ No newline at end of file
diff --git a/progression/tests.py b/progression/tests.py
new file mode 100644
index 0000000..7ce503c
--- /dev/null
+++ b/progression/tests.py
@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.
diff --git a/progression/urls.py b/progression/urls.py
new file mode 100644
index 0000000..cef076c
--- /dev/null
+++ b/progression/urls.py
@@ -0,0 +1,10 @@
+from django.urls import path
+from . import views
+
+app_name = 'progression'
+
+urlpatterns = [
+    # On ne garde QUE la route AJAX ici.
+    # Les routes 'list', 'detail', etc. doivent rester dans courses/urls.py
+    path('ajax/toggle-lesson/', views.toggle_lesson_completion, name='toggle_lesson'),
+]
\ No newline at end of file
diff --git a/progression/views.py b/progression/views.py
new file mode 100644
index 0000000..1cee11c
--- /dev/null
+++ b/progression/views.py
@@ -0,0 +1,41 @@
+from django.shortcuts import render, get_object_or_404
+import json
+from django.http import JsonResponse
+from django.views.decorators.http import require_POST
+from django.contrib.auth.decorators import login_required
+from progression.models import Progression
+from courses.models import Lesson
+
+@login_required
+@require_POST
+def toggle_lesson_completion(request):
+    data = json.loads(request.body)
+    lesson_id = data.get('lesson_id')
+
+    lesson = get_object_or_404(Lesson, id=lesson_id)
+    # On remonte au cours via le module (Lesson -> Module -> Course)
+    course = lesson.module.course
+
+    # On récupère ou crée la progression
+    progression, created = Progression.objects.get_or_create(
+        user=request.user,
+        course=course
+    )
+
+    # La logique du Toggle
+    if lesson in progression.completed_lessons.all():
+        progression.completed_lessons.remove(lesson)
+        is_completed = False
+    else:
+        progression.completed_lessons.add(lesson)
+        is_completed = True
+
+        # Mise à jour de la dernière leçon vue
+        progression.last_viewed_lesson = lesson
+        progression.save()
+
+    return JsonResponse({
+        'status': 'success',
+        'is_completed': is_completed,
+        'new_percent': progression.percent_completed
+    })
\ No newline at end of file
diff --git a/static/css/app.css b/static/css/app.css
index 508c4be..367520c 100644
--- a/static/css/app.css
+++ b/static/css/app.css
@@ -247,9 +247,9 @@ html { box-sizing: border-box; }
   gap: 6px;
   padding: 2px 8px;
   margin-left: 8px;
-  border-radius: 999px;
+  border-radius: 2px;
   background: var(--accent);
-  color: var(--warning-contrast);
+  color: var(--text);
   font-size: 11px;
   font-weight: 800;
   letter-spacing: .3px;
@@ -259,6 +259,40 @@ html { box-sizing: border-box; }
   white-space: nowrap;
 }
 
+.current-tag {
+    display: inline-flex;
+    align-items: center;
+    gap: 6px;
+    padding: 2px 8px;
+    border-radius: 2px;
+    background: var(--primary);
+    color: var(--primary-contrast);
+    font-size: 11px;
+    font-weight: 800;
+    letter-spacing: .3px;
+    line-height: 1.2;
+    vertical-align: middle;
+    text-transform: uppercase;
+    white-space: nowrap;
+}
+
+.completed-tag {
+    display: inline-flex;
+    align-items: center;
+    gap: 6px;
+    padding: 2px 8px;
+    border-radius: 2px;
+    background: var(--success);
+    color: var(--success-contrast);
+    font-size: 11px;
+    font-weight: 800;
+    letter-spacing: .3px;
+    line-height: 1.2;
+    vertical-align: middle;
+    text-transform: uppercase;
+    white-space: nowrap;
+}
+
 .courseToc .tocLink.disabled {
   color: var(--text-muted);
   background: transparent;
@@ -269,6 +303,70 @@ html { box-sizing: border-box; }
   font-weight: 500;
 }
 
+/* Progression des cours */
+
+.progress-container {
+    display: flex;
+    flex-direction: row;
+}
+
+.progress-bar {
+    display: flex;
+    border-radius: var(--r-2);
+    border: 1px solid var(--border);
+    height: 20px;
+    background: var(--neutral-900);
+}
+
+.progress-text {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 4px;
+    color: var(--text);
+    font-size: 12px;
+    margin-left: 10px;
+}
+
+.progress-bar-fill {
+    background: var(--success);
+    height: 100%;
+    border-radius: var(--r-2) 0 0 var(--r-2);
+}
+
+.course-completed {
+    display: flex;
+    flex-direction: row;
+    border-radius: var(--r-2);
+    border: 1px solid var(--border);
+    margin: var(--space-2) 0;
+    background: var(--success);
+}
+
+.course-completed .container {
+    display: flex;
+    flex-direction: column;
+    padding: var(--space-2);
+    height: 100%;
+    vertical-align: middle;
+}
+
+.course-completed .container .icon {
+    color: var(--success-contrast);
+    font-size: 50px;
+}
+
+.course-completed .container .title {
+    color: var(--success-contrast);
+    font-size: 28px;
+    font-weight: 600;
+}
+
+.course-completed .container .content {
+    color: var(--success-contrast);
+    font-size: 14px;
+}
+
 [data-theme='light'] {
   /* Palette: plus nuancé, moins "blanc" */
   --bg: #eef3f7; /* fond légèrement teinté bleu-gris */
@@ -751,6 +849,100 @@ img {
     height: auto;
 }
 
+/* ======================================
+   Blog components
+   ====================================== */
+
+/* Accessibilité: élément visuellement masqué mais accessible aux lecteurs d'écran */
+.sr-only {
+    position: absolute !important;
+    width: 1px !important;
+    height: 1px !important;
+    padding: 0 !important;
+    margin: -1px !important;
+    overflow: hidden !important;
+    clip: rect(0,0,0,0) !important;
+    white-space: nowrap !important;
+    border: 0 !important;
+}
+
+/* Blog layout wrappers */
+.blog.blog-home .blog-header {
+    display: grid;
+    gap: var(--space-3);
+    margin-bottom: var(--space-6);
+}
+.blog-title {
+    margin: 0;
+}
+.blog-description {
+    color: var(--text-muted);
+    font-size: 1.05rem;
+}
+
+/* Post list grid */
+.post-list {
+    display: grid;
+    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
+    gap: var(--space-5);
+}
+
+.post-card {
+    background: var(--surface);
+    border: 1px solid var(--border-subtle);
+    border-radius: var(--r-3);
+    box-shadow: var(--shadow-1);
+    padding: var(--space-5);
+    display: grid;
+    gap: var(--space-3);
+    transition: transform var(--transition-1), box-shadow var(--transition-1), border-color var(--transition-1);
+}
+.post-card:hover {
+    transform: translateY(-2px);
+    box-shadow: var(--shadow-2);
+    border-color: var(--border-strong);
+}
+.post-card-title {
+    margin: 0;
+}
+.post-card-title a { color: var(--fg); text-decoration: none; }
+.post-card-title a:hover { color: var(--link-hover); text-decoration: underline; }
+.post-excerpt { color: var(--text); opacity: 0.95; }
+.post-actions { margin-top: 2px; }
+
+/* Post meta (date, tags) */
+.post-meta { color: var(--text-muted); font-size: 0.95rem; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
+.post-meta i { color: var(--muted); margin-right: 6px; }
+.post-meta .sep { color: var(--muted); }
+
+/* Post detail */
+.post-detail .post-header { margin-bottom: var(--space-5); }
+.post-detail .post-title { margin-bottom: var(--space-2); }
+
+/* Prose content: typographic rhythm inside articles */
+.prose {
+    line-height: 1.75;
+    color: var(--text);
+}
+.prose :where(p, ul, ol, blockquote, pre, table, img) { margin: 0 0 var(--space-4); }
+.prose a { color: var(--link); }
+.prose a:hover { color: var(--link-hover); text-decoration: underline; }
+.prose blockquote {
+    margin-left: 0;
+    padding-left: var(--space-4);
+    border-left: 3px solid var(--border-strong);
+    color: var(--text-muted);
+    font-style: italic;
+}
+.prose code { font-family: var(--font-mono); background: var(--neutral-300); padding: 0 4px; border-radius: var(--r-1); }
+.prose pre {
+    background: var(--code-bg);
+    color: var(--code-text);
+    padding: var(--space-4);
+    border-radius: var(--r-2);
+    overflow: auto;
+}
+
 /* Make embedded media responsive */
 iframe, video { max-width: 100%; height: auto; }
 
diff --git a/templates/blog/details.html b/templates/blog/details.html
new file mode 100644
index 0000000..0cf8ef9
--- /dev/null
+++ b/templates/blog/details.html
@@ -0,0 +1,25 @@
+{% extends 'layout.html' %}
+{% load comment_format %}
+{% block title %} | Blog : {{ post.name }}{% endblock %}
+{% block og_title %}Blog de Partir De Zéro : {{ post.name }}{% endblock %}
+{% block description %}{{ post.content|striptags|truncatewords:20 }}{% endblock %}
+{% block og_description %}{{ post.content|striptags|truncatewords:20 }}{% endblock %}
+
+{% block content %}
+    <section class="blog post-detail">
+        <header class="post-header">
+            <h1 class="post-title">{{ post.name }}</h1>
+            <div class="post-meta">
+                <span class="post-date"><i class="fa-regular fa-calendar"></i> {{ post.created_at|date:"d F Y" }}</span>
+                {% if post.tags %}
+                    <span class="sep">•</span>
+                    <span class="post-tags"><i class="fa-solid fa-tag"></i> {{ post.tags }}</span>
+                {% endif %}
+            </div>
+        </header>
+
+        <article class="post-content prose">
+            {{ post.content|comment_markdown }}
+        </article>
+    </section>
+{% endblock %}
\ No newline at end of file
diff --git a/templates/blog/home.html b/templates/blog/home.html
new file mode 100644
index 0000000..b89265d
--- /dev/null
+++ b/templates/blog/home.html
@@ -0,0 +1,17 @@
+{% extends 'layout.html' %}
+{% block title %} | Blog{% endblock %}
+{% block og_title %}Blog de Partir De Zéro{% endblock %}
+{% block description %}{{ settings.blog_description }}{% endblock %}
+{% block og_description %}{{ settings.blog_description }}{% endblock %}
+
+{% block content %}
+    <section class="blog blog-home">
+        <header class="blog-header">
+            <h1 class="blog-title">{{ settings.blog_title|default:'Blog' }}</h1>
+            <p class="blog-description">{{ settings.blog_description }}</p>
+        </header>
+
+        <h2 class="sr-only">Liste des articles</h2>
+        {% include 'blog/partials/_posts_list.html' %}
+    </section>
+{% endblock %}
\ No newline at end of file
diff --git a/templates/blog/partials/_posts_list.html b/templates/blog/partials/_posts_list.html
new file mode 100644
index 0000000..c1b05e8
--- /dev/null
+++ b/templates/blog/partials/_posts_list.html
@@ -0,0 +1,21 @@
+{% load comment_format %}
+<div class="post-list">
+    {% for post in posts %}
+        <article class="post-card">
+            <h3 class="post-card-title"><a href="{% url 'blog:post_detail' post.slug %}">{{ post.name|truncatewords:6 }}</a></h3>
+            <div class="post-meta">
+                <span class="post-date"><i class="fa-regular fa-calendar"></i> {{ post.created_at|date:"d F Y" }}</span>
+                {% if post.tags %}
+                    <span class="sep">•</span>
+                    <span class="post-tags"><i class="fa-solid fa-tag"></i> {{ post.tags }}</span>
+                {% endif %}
+            </div>
+            <p class="post-excerpt">{{ post.description|comment_markdown|truncatewords:26 }}</p>
+            <div class="post-actions">
+                <a class="button button-secondary" href="{% url 'blog:post_detail' post.slug %}">Lire l'article →</a>
+            </div>
+        </article>
+    {% empty %}
+        <p>Aucun article pour le moment.</p>
+    {% endfor %}
+    </div>
diff --git a/templates/courses/partials/_course_header.html b/templates/courses/partials/_course_header.html
index bff069f..33fbd36 100644
--- a/templates/courses/partials/_course_header.html
+++ b/templates/courses/partials/_course_header.html
@@ -4,3 +4,22 @@
     Un cours proposé par&nbsp;<a href="{% url 'another_profile' course.author.id %}">{{ course.author }}</a>
     </p>
 <p>{{ course.content }}</p>
+<strong>Progression pour ce cours</strong>
+{% if user_progress.percent_completed == 100 %}
+    <div class="course-completed">
+        <div class="container">
+            <div class="icon"><i class="fa-solid fa-check"></i></div>
+        </div>
+        <div class="container">
+            <div class="title">Félicitation</div>
+            <div class="content">Tu as terminé(e) ce cours ! Tu peux réellement être fier(e) de toi !!</div>
+        </div>
+    </div>
+{% else %}
+    <div class="progress-container">
+        <div class="progress-bar" style="width: 100%;">
+            <div id="progress-bar-fill" class="progress-bar-fill" style="width: {{ user_progress.percent_completed }}%; height: 100%; transition: width 0.3s;"></div>
+        </div>
+        <div id="progress-text" class="progress-text">{{ user_progress.percent_completed }}%</div>
+    </div>
+{% endif %}
diff --git a/templates/courses/partials/_course_toc.html b/templates/courses/partials/_course_toc.html
index 9039157..1389e55 100644
--- a/templates/courses/partials/_course_toc.html
+++ b/templates/courses/partials/_course_toc.html
@@ -13,7 +13,8 @@
                         <li class="tocLesson{% if lesson and lesson.id == item.id %} current{% endif %}">
                             <a class="tocLink {% if item.is_premium and user.profile.is_premium == False %}premium{% endif %}" href="{% url 'courses:lesson_detail' course.slug item.module.slug item.slug %}">
                                 {{ item.name }} {% if item.is_premium %}<span class="premium-tag">PREMIUM</span>{% endif %}
-                                {% if lesson and lesson.id == item.id %}<span class="tocCurrentTag">(cours actuel)</span>{% endif %}
+                                {% if lesson and lesson.id == item.id %}<span class="current-tag">(cours actuel)</span>{% endif %}
+                                {% if item.id in completed_lesson_ids %}<span class="completed-tag">Terminé</span>{% endif %}
                             </a>
                             {% if lesson and lesson.id == item.id %}
                                 <div class="lessonInline">
@@ -69,6 +70,12 @@
                                         <div class="content-lesson">
                                             <div class="lessonTitle">Ce que l'on voit durant ce cours : </div>
                                             {{ lesson.content|comment_markdown }}
+
+                                            {% if lesson.id in completed_lesson_ids %}
+                                                <button id="btn-complete" data-lesson-id="{{ lesson.id }}" class="btn btn-success">✅ Terminée</button>
+                                            {% else %}
+                                                <button id="btn-complete" data-lesson-id="{{ lesson.id }}" class="btn btn-secondary">Marquer comme terminé</button>
+                                            {% endif %}
                                         </div>
                                     <h3 id="comments">Commentaires</h3>
                                     <div class="lessonComments">
@@ -251,6 +258,64 @@
                                             });
                                         })();
                                     </script>
+
+                                    <!-- Progression Bar -->
+                                    <script>
+                                        document.addEventListener('DOMContentLoaded', function() {
+                                            const btn = document.getElementById('btn-complete');
+                                            const progressBar = document.getElementById('progress-bar-fill');
+                                            const progressText = document.getElementById('progress-text');
+
+                                            btn.addEventListener('click', function() {
+                                                const lessonId = this.getAttribute('data-lesson-id');
+
+                                                // 1. On prépare la requête
+                                                fetch("{% url 'progression:toggle_lesson' %}", {  // Assure-toi que c'est le bon nom dans urls.py
+                                                    method: 'POST',
+                                                    headers: {
+                                                        'Content-Type': 'application/json',
+                                                        'X-CSRFToken': getCookie('csrftoken') // Fonction indispensable pour Django
+                                                    },
+                                                    body: JSON.stringify({
+                                                        'lesson_id': lessonId
+                                                    })
+                                                })
+                                                .then(response => response.json())
+                                                .then(data => {
+                                                    if (data.status === 'success') {
+                                                        // 2. On met à jour le visuel de la barre
+                                                        progressBar.style.width = data.new_percent + '%';
+                                                        progressText.innerText = data.new_percent + '%';
+
+                                                        // 3. On change l'aspect du bouton
+                                                        if (data.is_completed) {
+                                                            btn.innerText = "✅ Terminée";
+                                                            btn.style.backgroundColor = "green";
+                                                        } else {
+                                                            btn.innerText = "Marquer comme terminé";
+                                                            btn.style.backgroundColor = "gray";
+                                                        }
+                                                    }
+                                                });
+                                            });
+
+                                            // --- Fonction Helper pour récupérer le cookie CSRF de Django ---
+                                            function getCookie(name) {
+                                                let cookieValue = null;
+                                                if (document.cookie && document.cookie !== '') {
+                                                    const cookies = document.cookie.split(';');
+                                                    for (let i = 0; i < cookies.length; i++) {
+                                                        const cookie = cookies[i].trim();
+                                                        if (cookie.substring(0, name.length + 1) === (name + '=')) {
+                                                            cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
+                                                            break;
+                                                        }
+                                                    }
+                                                }
+                                                return cookieValue;
+                                            }
+                                        });
+                                        </script>
                                     </div> <!-- /.lessonComments -->
                                 </div> <!-- /.lesson -->
                                 </div> <!-- /.lessonInline -->
diff --git a/templates/home/stats_charts.html b/templates/home/stats_charts.html
new file mode 100644
index 0000000..159bdcd
--- /dev/null
+++ b/templates/home/stats_charts.html
@@ -0,0 +1,96 @@
+{% extends "layout.html" %}
+{% load static %}
+
+{% block title %}- Stats · Graphiques{% endblock %}
+
+{% block extra_head %}
+  <script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.1/dist/chart.umd.min.js"></script>
+  <style>
+    .card{background:var(--bg-200);border-radius:12px;padding:16px;border:1px solid var(--bg-300)}
+    .grid{display:grid;grid-template-columns:1fr;gap:24px;margin:16px 0}
+    .grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
+    .toolbar{display:flex;gap:8px;align-items:center;justify-content:space-between;margin:8px 0}
+    @media (max-width: 960px){.grid-2{grid-template-columns:1fr}}
+  </style>
+{% endblock %}
+
+{% block content %}
+  <div class="container">
+    <h1>Graphiques statistiques</h1>
+
+    <form method="get" class="toolbar">
+      <div>
+        <label for="p">Période:&nbsp;</label>
+        <select id="p" name="p" onchange="this.form.submit()">
+          {% for opt in period_options %}
+            <option value="{{ opt }}" {% if p == opt %}selected{% endif %}>{{ opt }} jours</option>
+          {% endfor %}
+        </select>
+        <span style="margin-left:8px;color:var(--fg-300)">Du {{ start_date }} au {{ end_date }}</span>
+      </div>
+      <div style="color:var(--fg-300)">Mise en cache 15 minutes</div>
+    </form>
+
+    <div class="grid">
+      <div class="card">
+        <h3>Visiteurs uniques par jour</h3>
+        <canvas id="chartVisitors" height="120"></canvas>
+      </div>
+      <div class="card">
+        <h3>Conversions (visiteurs devenus utilisateurs) par jour</h3>
+        <canvas id="chartConversions" height="120"></canvas>
+      </div>
+    </div>
+
+    <div class="grid-2">
+      <div class="card">
+        <h3>Top sources (visiteurs uniques)</h3>
+        <canvas id="chartSources" height="200"></canvas>
+      </div>
+      <div class="card">
+        <h3>Top pays (visiteurs uniques)</h3>
+        <canvas id="chartCountries" height="200"></canvas>
+      </div>
+    </div>
+
+    <p style="margin-top:16px"><a href="{% url 'home:stats_dashboard' %}">← Retour au tableau de bord</a></p>
+  </div>
+
+  <script>
+    const labels = {{ labels_json|safe }};
+    const visitorsSeries = {{ visitors_series_json|safe }};
+    const conversionsSeries = {{ conversions_series_json|safe }};
+    const sourcesLabels = {{ sources_labels_json|safe }};
+    const sourcesValues = {{ sources_values_json|safe }};
+    const countriesLabels = {{ countries_labels_json|safe }};
+    const countriesValues = {{ countries_values_json|safe }};
+
+    const ctxVisitors = document.getElementById('chartVisitors');
+    new Chart(ctxVisitors, {
+      type: 'line',
+      data: { labels, datasets: [{ label: 'Visiteurs uniques', data: visitorsSeries, borderColor: '#4f46e5', backgroundColor: 'rgba(79,70,229,.2)', tension:.2 }] },
+      options: { responsive: true, scales: { y: { beginAtZero: true } }, plugins: { legend: { position: 'bottom' } } }
+    });
+
+    const ctxConv = document.getElementById('chartConversions');
+    new Chart(ctxConv, {
+      type: 'line',
+      data: { labels, datasets: [{ label: 'Conversions', data: conversionsSeries, borderColor: '#059669', backgroundColor: 'rgba(5,150,105,.2)', tension:.2 }] },
+      options: { responsive: true, scales: { y: { beginAtZero: true } }, plugins: { legend: { position: 'bottom' } } }
+    });
+
+    const ctxSources = document.getElementById('chartSources');
+    new Chart(ctxSources, {
+      type: 'doughnut',
+      data: { labels: sourcesLabels, datasets: [{ data: sourcesValues, backgroundColor: ['#4f46e5','#059669','#f59e0b','#ef4444','#10b981','#3b82f6','#8b5cf6','#f97316','#22c55e','#14b8a6'] }] },
+      options: { plugins: { legend: { position: 'bottom' } } }
+    });
+
+    const ctxCountries = document.getElementById('chartCountries');
+    new Chart(ctxCountries, {
+      type: 'bar',
+      data: { labels: countriesLabels, datasets: [{ label: 'Visiteurs', data: countriesValues, backgroundColor: '#f59e0b' }] },
+      options: { responsive: true, scales: { y: { beginAtZero: true } }, plugins: { legend: { display: false } } }
+    });
+  </script>
+{% endblock %}
diff --git a/templates/home/stats_dashboard.html b/templates/home/stats_dashboard.html
new file mode 100644
index 0000000..3dddab3
--- /dev/null
+++ b/templates/home/stats_dashboard.html
@@ -0,0 +1,177 @@
+{% extends "layout.html" %}
+{% load static %}
+
+{% block title %}- Tableau de bord{% endblock %}
+
+{% block extra_head %}
+  <script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.1/dist/chart.umd.min.js"></script>
+  <style>
+    .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:16px 0}
+    .card{background:var(--bg-200);border-radius:12px;padding:16px;border:1px solid var(--bg-300)}
+    .card h3{margin:0 0 8px 0;font-size:16px;color:var(--fg-300)}
+    .kpi{font-size:28px;font-weight:700}
+    .toolbar{display:flex;gap:8px;align-items:center;justify-content:space-between;margin:8px 0}
+    .charts{display:grid;grid-template-columns:1fr;gap:24px;margin:24px 0}
+    .tables{display:grid;grid-template-columns:1fr 1fr;gap:24px}
+    @media (max-width: 960px){.stats-grid{grid-template-columns:repeat(2,1fr)}.tables{grid-template-columns:1fr}}
+  </style>
+{% endblock %}
+
+{% block content %}
+  <div class="container">
+    <h1>Tableau de bord statistiques</h1>
+    <p style="margin:8px 0"><a href="{% url 'home:stats_charts' %}">→ Voir la page de graphiques</a></p>
+
+    <form method="get" class="toolbar">
+      <div>
+        <label for="p">Période:&nbsp;</label>
+        <select id="p" name="p" onchange="this.form.submit()">
+          {% for opt in period_options %}
+            <option value="{{ opt }}" {% if p == opt %}selected{% endif %}>{{ opt }} jours</option>
+          {% endfor %}
+        </select>
+        <span style="margin-left:8px;color:var(--fg-300)">Du {{ start_date }} au {{ end_date }}</span>
+      </div>
+      <div style="color:var(--fg-300)">Mise en cache 15 minutes</div>
+    </form>
+
+    <section class="stats-grid">
+      <div class="card">
+        <h3>Visiteurs uniques (période)</h3>
+        <div class="kpi">{{ kpi.unique_visitors }}</div>
+      </div>
+      <div class="card">
+        <h3>Visiteurs revenants (période)</h3>
+        <div class="kpi">{{ kpi.returning_visitors }}</div>
+      </div>
+      <div class="card">
+        <h3>Conversions en utilisateurs (période)</h3>
+        <div class="kpi">{{ kpi.converted_visitors }}</div>
+      </div>
+      <div class="card">
+        <h3>Utilisateurs (total)</h3>
+        <div class="kpi">{{ kpi.total_users }}</div>
+      </div>
+      <div class="card">
+        <h3>Nouveaux utilisateurs (période)</h3>
+        <div class="kpi">{{ kpi.new_users_period }}</div>
+      </div>
+      <div class="card">
+        <h3>Utilisateurs actifs (période)</h3>
+        <div class="kpi">{{ kpi.active_users_period }}</div>
+      </div>
+      <div class="card">
+        <h3>Cours (publiés / total)</h3>
+        <div class="kpi">{{ kpi.courses_enabled }} / {{ kpi.total_courses }}</div>
+      </div>
+      <div class="card">
+        <h3>Leçons (total)</h3>
+        <div class="kpi">{{ kpi.total_lessons }}</div>
+      </div>
+      <div class="card">
+        <h3>Articles de blog (total)</h3>
+        <div class="kpi">{{ kpi.total_posts }}</div>
+      </div>
+      <div class="card">
+        <h3>Revenus</h3>
+        {% if revenus_disponibles %}
+          <div class="kpi">—</div>
+        {% else %}
+          <div class="kpi" title="Aucune source de données">N/A</div>
+        {% endif %}
+      </div>
+      <div class="card">
+        <h3>Technique</h3>
+        {% if technique_disponible %}
+          <div class="kpi">—</div>
+        {% else %}
+          <div class="kpi" title="Aucune source de données">N/A</div>
+        {% endif %}
+      </div>
+    </section>
+
+    <section class="charts">
+      <div class="card">
+        <h3>Évolution quotidienne</h3>
+        <canvas id="chartMain" height="120"></canvas>
+      </div>
+    </section>
+
+    <section class="tables">
+      <div class="card">
+        <h3>Nouveaux utilisateurs par jour</h3>
+        <table>
+          <thead><tr><th>Jour</th><th>Nb</th></tr></thead>
+          <tbody>
+            {% for row in new_users_table %}
+              <tr><td>{{ row.0 }}</td><td>{{ row.1 }}</td></tr>
+            {% endfor %}
+          </tbody>
+        </table>
+      </div>
+      <div class="card">
+        <h3>Nouveaux cours par jour</h3>
+        <table>
+          <thead><tr><th>Jour</th><th>Nb</th></tr></thead>
+          <tbody>
+            {% for row in new_courses_table %}
+              <tr><td>{{ row.0 }}</td><td>{{ row.1 }}</td></tr>
+            {% endfor %}
+          </tbody>
+        </table>
+      </div>
+    </section>
+
+    <section class="tables">
+      <div class="card">
+        <h3>Top sources (visiteurs uniques)</h3>
+        <table>
+          <thead><tr><th>Source</th><th>Visiteurs</th></tr></thead>
+          <tbody>
+            {% for row in top_sources_table %}
+              <tr><td>{{ row.0 }}</td><td>{{ row.1 }}</td></tr>
+            {% empty %}
+              <tr><td colspan="2">Aucune donnée</td></tr>
+            {% endfor %}
+          </tbody>
+        </table>
+      </div>
+      <div class="card">
+        <h3>Top pays (visiteurs uniques)</h3>
+        <table>
+          <thead><tr><th>Pays</th><th>Visiteurs</th></tr></thead>
+          <tbody>
+            {% for row in top_countries_table %}
+              <tr><td>{{ row.0 }}</td><td>{{ row.1 }}</td></tr>
+            {% empty %}
+              <tr><td colspan="2">Aucune donnée</td></tr>
+            {% endfor %}
+          </tbody>
+        </table>
+      </div>
+    </section>
+  </div>
+
+  <script>
+    const labels = {{ labels_json|safe }};
+    const series = {{ series_json|safe }};
+    const ctx = document.getElementById('chartMain');
+    const chart = new Chart(ctx, {
+      type: 'line',
+      data: {
+        labels: labels,
+        datasets: [
+          {label: 'Nouveaux utilisateurs', data: series.new_users, borderColor: '#4f46e5', backgroundColor: 'rgba(79,70,229,.2)', tension:.2},
+          {label: 'Nouveaux cours', data: series.new_courses, borderColor: '#059669', backgroundColor: 'rgba(5,150,105,.2)', tension:.2},
+          {label: 'Nouveaux articles', data: series.new_posts, borderColor: '#f59e0b', backgroundColor: 'rgba(245,158,11,.2)', tension:.2},
+          {label: 'Activité progression', data: series.activity_progress, borderColor: '#ef4444', backgroundColor: 'rgba(239,68,68,.2)', tension:.2}
+        ]
+      },
+      options: {
+        responsive: true,
+        scales: {y: {beginAtZero: true}},
+        plugins: {legend: {position: 'bottom'}}
+      }
+    });
+  </script>
+{% endblock %}
diff --git a/templates/layout.html b/templates/layout.html
index 2c3189d..2e7a521 100644
--- a/templates/layout.html
+++ b/templates/layout.html
@@ -39,8 +39,8 @@
         (function() {
             try {
                 var stored = localStorage.getItem('pdz-theme');
-                var prefersLight = window.matchMedia && window.matchMedia('(prefers-color-scheme: light)').matches;
-                var theme = stored || (prefersLight ? 'light' : 'dark');
+                var prefersLight = window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches;
+                var theme = stored || (prefersLight ? 'dark' : 'light');
                 document.documentElement.setAttribute('data-theme', theme);
                 if (theme === 'light') {
                     var link = document.getElementById('theme-css');
diff --git a/templates/partials/_header.html b/templates/partials/_header.html
index 7b6107d..20db214 100644
--- a/templates/partials/_header.html
+++ b/templates/partials/_header.html
@@ -20,8 +20,8 @@
                     {% endfor %}
                 </ul>
             </li>
-            <!--<li><a href="">Tutoriels</a></li>
-            <li><a href="">Billets</a></li>-->
+            <!--<li><a href="">Tutoriels</a></li>-->
+            <li><a href="{% url 'blog:blog' %}">Blog</a></li>
         </ul>
         <div class="navend">
             <ul>
diff --git a/users/forms.py b/users/forms.py
index 2335d4c..362845e 100644
--- a/users/forms.py
+++ b/users/forms.py
@@ -27,7 +27,15 @@ class UserRegistrationForm(forms.Form):
         password2 = cleaned_data.get("password2")
 
         if password1 and password2 and password1 != password2:
-            raise forms.ValidationError("Passwords do not match")
+            raise forms.ValidationError("Les mots de passe ne correspondent pas.")
+
+        return cleaned_data
+
+    def clean_username(self):
+        username = self.cleaned_data.get('username')
+        if username and User.objects.filter(username__iexact=username).exists():
+            raise forms.ValidationError("Ce pseudo est déjà pris. Veuillez en choisir un autre.")
+        return username
 
 class UserLoginForm(forms.Form):
     username = forms.CharField(
diff --git a/users/tokens.py b/users/tokens.py
new file mode 100644
index 0000000..bc82caf
--- /dev/null
+++ b/users/tokens.py
@@ -0,0 +1,4 @@
+from django.contrib.auth.tokens import PasswordResetTokenGenerator
+
+# Générateur de tokens pour l'activation de compte
+activation_token = PasswordResetTokenGenerator()
diff --git a/users/urls.py b/users/urls.py
index cdf7a52..e46826d 100644
--- a/users/urls.py
+++ b/users/urls.py
@@ -7,6 +7,8 @@ urlpatterns = [
     path('', views.register, name='register'),
     path('login/', views.login, name='login'),
     path('logout/', views.logout, name='logout'),
+    # Activation de compte par lien tokenisé
+    path('activate/<uidb64>/<token>/', views.activate, name='activate'),
     path('profile/view/<int:user_id>/', views.another_profile, name='another_profile'),
     path('complete-profile/', views.complete_profile, name='complete_profile'),
     path('profile/', views.profile, name='profile'),
diff --git a/users/views.py b/users/views.py
index 7b6ce5e..bf3c51d 100644
--- a/users/views.py
+++ b/users/views.py
@@ -5,6 +5,11 @@ from django.contrib.auth.models import User
 from courses.models import Course
 from .forms import UserRegistrationForm, UserLoginForm, UserUpdateForm, ProfileUpdateForm, CompleteProfileForm
 from django.contrib.auth.decorators import login_required
+from django.core.mail import send_mail
+from django.urls import reverse
+from django.utils.http import urlsafe_base64_encode, urlsafe_base64_decode
+from django.utils.encoding import force_bytes
+from .tokens import activation_token
 
 def register(request):
     # Si l'utilisateur est deja connecté, on le redirige vers la page de profil
@@ -13,13 +18,36 @@ def register(request):
     if request.method == 'POST':
         form = UserRegistrationForm(request.POST)
         if form.is_valid():
+            # Crée un utilisateur inactif en attente d'activation par e‑mail
             user = User.objects.create_user(
                 username=form.cleaned_data['username'],
                 email=form.cleaned_data['email'],
                 password=form.cleaned_data['password1']
             )
-            auth_login(request, user)
-            return redirect('profile')
+            user.is_active = False
+            user.save()
+
+            # Envoi du lien d'activation par e‑mail
+            uid = urlsafe_base64_encode(force_bytes(user.pk))
+            token = activation_token.make_token(user)
+            activation_link = request.build_absolute_uri(
+                reverse('activate', kwargs={'uidb64': uid, 'token': token})
+            )
+            subject = 'Active ton compte sur partirdezero'
+            message = (
+                'Bienvenue !\n\n'
+                'Pour activer ton compte, clique sur le lien suivant (valide pendant une durée limitée) :\n'
+                f'{activation_link}\n\n'
+                "Si tu n'es pas à l'origine de cette inscription, ignore ce message."
+            )
+            try:
+                send_mail(subject, message, None, [user.email], fail_silently=True)
+            except Exception:
+                # Même si l'envoi échoue, on n'interrompt pas le flux; un admin vérifiera la config e‑mail
+                pass
+
+            messages.success(request, "Inscription réussie. Vérifie ta boîte mail pour activer ton compte.")
+            return redirect('login')
     else:
         form = UserRegistrationForm()
     return render(request, 'users/register.html', {'form': form})
@@ -32,8 +60,15 @@ def login(request):
             password = form.cleaned_data['password']
             user = authenticate(request, username=username, password=password)
             if user is not None:
+                if not user.is_active:
+                    messages.error(request, "Votre compte n'est pas encore activé. Consultez l'e‑mail d'activation envoyé." )
+                    return render(request, 'users/login.html', {'form': form})
                 auth_login(request, user)
                 return redirect('profile')
+            else:
+                # Identifiants invalides: avertir l'utilisateur
+                messages.error(request, "Nom d'utilisateur ou mot de passe incorrect.")
+                return render(request, 'users/login.html', {'form': form})
     else:
         form = UserLoginForm()
     return render(request, 'users/login.html', {'form': form})
@@ -106,3 +141,21 @@ def create_post(request):
 def another_profile(request, user_id):
     user = User.objects.get(id=user_id)
     return render(request, 'users/another_profile.html', {'user': user})
+
+# Activation de compte via lien tokenisé
+def activate(request, uidb64, token):
+    try:
+        uid = urlsafe_base64_decode(uidb64).decode()
+        user = User.objects.get(pk=uid)
+    except Exception:
+        user = None
+
+    if user and activation_token.check_token(user, token):
+        if not user.is_active:
+            user.is_active = True
+            user.save()
+        messages.success(request, 'Votre compte a été activé. Vous pouvez maintenant vous connecter.')
+        return redirect('login')
+
+    messages.error(request, "Lien d'activation invalide ou expiré. Demandez un nouveau lien ou inscrivez‑vous à nouveau.")
+    return redirect('register')