diff --git a/src/pdf_equilibrist/ui/easter_egg.py b/src/pdf_equilibrist/ui/easter_egg.py
new file mode 100644
index 0000000..102c6a3
--- /dev/null
+++ b/src/pdf_equilibrist/ui/easter_egg.py
@@ -0,0 +1,76 @@
+"""Easter-egg : 7 clics sur le logo de la barre de titre lancent une courte pluie « Matrix » verte."""
+from __future__ import annotations
+import math
+import random
+
+from PyQt6.QtWidgets import QWidget
+from PyQt6.QtGui import QPainter, QColor, QFont
+from PyQt6.QtCore import Qt, QTimer
+
+ACCENT = (107, 191, 78)   # vert du logo, #6BBF4E
+CLICKS_NEEDED = 7
+CLICK_WINDOW_MS = 2500    # délai max entre deux clics pour que la série continue
+DURATION_MS = 4000
+FRAME_MS = 45
+CELL = 16                 # taille d'une colonne / d'un caractère (px)
+GLYPHS = "01ABCDEF<>/|=+*"   # ASCII seulement : aucune police spéciale requise
+# random sert uniquement à l'effet visuel (B311 : aucun usage cryptographique)
+
+
+class MatrixRain(QWidget):
+    """Calque transparent aux clics, posé sur une fenêtre, qui se détruit tout seul."""
+
+    def __init__(self, host: QWidget):
+        super().__init__(host)
+        self.setAttribute(Qt.WidgetAttribute.WA_TransparentForMouseEvents)
+        self.setAttribute(Qt.WidgetAttribute.WA_NoSystemBackground)
+        self.setGeometry(host.rect())
+        self._cols = max(1, self.width() // CELL)
+        self._heads = [random.uniform(-30, 0) for _ in range(self._cols)]  # nosec B311
+        self._speeds = [random.uniform(0.5, 1.4) for _ in range(self._cols)]  # nosec B311
+        self._tick = 0
+        self._timer = QTimer(self)
+        self._timer.timeout.connect(self._step)
+        self._timer.start(FRAME_MS)
+        QTimer.singleShot(DURATION_MS, self._finish)
+        self.show()
+        self.raise_()
+
+    def _step(self):
+        self._tick += 1
+        for i in range(self._cols):
+            self._heads[i] += self._speeds[i]
+        self.update()
+
+    def _finish(self):
+        self._timer.stop()
+        self.hide()
+        self.deleteLater()
+
+    def paintEvent(self, _event):
+        p = QPainter(self)
+        font = QFont("Consolas")
+        font.setPixelSize(CELL - 2)
+        p.setFont(font)
+        # Fondu d'entrée et de sortie + pulsation du vert d'accent
+        t = self._tick * FRAME_MS / DURATION_MS
+        fade = min(1.0, t * 6, (1 - t) * 6) if 0 <= t <= 1 else 0
+        pulse = 0.75 + 0.25 * math.sin(self._tick * 0.35)
+        rows = self.height() // CELL + 1
+        for c in range(self._cols):
+            head = int(self._heads[c])
+            for k in range(14):                       # traînée de 14 caractères
+                r = head - k
+                if not 0 <= r < rows:
+                    continue
+                alpha = int(255 * fade * pulse * (1 - k / 14))
+                col = QColor(255, 255, 255, alpha) if k == 0 else QColor(*ACCENT, alpha)
+                p.setPen(col)
+                p.drawText(c * CELL, r * CELL + CELL - 3, random.choice(GLYPHS))  # nosec B311
+        p.end()
+
+
+def trigger(window: QWidget) -> None:
+    """Lance la pluie sur ``window`` (ignoré si une est déjà en cours)."""
+    if window.findChild(MatrixRain) is None:
+        MatrixRain(window)
diff --git a/src/pdf_equilibrist/ui/title_bar.py b/src/pdf_equilibrist/ui/title_bar.py
index 80a5bf8..f77e698 100644
--- a/src/pdf_equilibrist/ui/title_bar.py
+++ b/src/pdf_equilibrist/ui/title_bar.py
@@ -52,7 +52,8 @@
     QFrame,
 )
 from PyQt6.QtGui import QPixmap, QIcon, QPainter, QColor, QFont, QPen
-from PyQt6.QtCore import Qt, pyqtSignal, QSize, QRectF
+from PyQt6.QtCore import Qt, pyqtSignal, QSize, QRectF, QEvent
+import time
 from pdf_equilibrist import theme
 
 ACCENT = "#6BBF4E"
@@ -225,6 +226,9 @@ def __init__(self, parent=None):
         self._logo.setFixedSize(26, 38)
         self._logo.setAlignment(Qt.AlignmentFlag.AlignCenter)
         layout.addWidget(self._logo)
+        self._logo_clicks = 0          # easter-egg : voir ui/easter_egg.py
+        self._logo_last_click = 0.0
+        self._logo.installEventFilter(self)
 
         # ── Nom de l'application ──────────────────────────────────────────────
         self._app_name = QLabel("PDF Equilibrist")
@@ -408,6 +412,26 @@ def update_max_button(self, is_maximized: bool):
 
     # ── Drag et double-clic ───────────────────────────────────────────────────
 
+    def eventFilter(self, obj, event):
+        """Compte les clics sur le logo (7 de suite = easter-egg).
+
+        Un 2ᵉ clic rapide arrive en ``MouseButtonDblClick`` et un clic non traité remonte à la
+        barre (déplacement / agrandir-restaurer) : on absorbe donc les deux sur le logo.
+        """
+        if obj is self._logo and event.type() in (QEvent.Type.MouseButtonPress,
+                                                  QEvent.Type.MouseButtonDblClick):
+            from pdf_equilibrist.ui import easter_egg
+            now = time.monotonic()
+            if (now - self._logo_last_click) * 1000 > easter_egg.CLICK_WINDOW_MS:
+                self._logo_clicks = 0
+            self._logo_last_click = now
+            self._logo_clicks += 1
+            if self._logo_clicks >= easter_egg.CLICKS_NEEDED:
+                self._logo_clicks = 0
+                easter_egg.trigger(self.window())
+            return True
+        return False
+
     def mousePressEvent(self, event):
         """
         Lance le déplacement natif de la fenêtre au clic gauche.