diff --git a/TODO.md b/TODO.md
index 8648771..56b356a 100644
--- a/TODO.md
+++ b/TODO.md
@@ -17,6 +17,9 @@
 - [x] **add.php / edit.php / partage/index.php** — use `sortable.min.js` + `file-upload-queue.js` instead of `file-preview.js`
 - [x] **docs/file-uploads.md** — reference document covering accepted types, size limits, storage layout, ordering, labels, security, and source file index
 
+## UI
+- [x] **admin header** — replace "Déconnexion" text link with SVG sign-out icon (accessible via `aria-label` + `.sr-only` span)
+
 ## Bug fixes
 - [x] **smtp-test.php** — wrap `SmtpRelay::send()` in `try/catch SmtpSendException` so SMTP delivery failures (e.g. 550 recipient rejected) surface as a proper flash error instead of an uncaught exception/silent crash
 - [x] **partage email retry** — on 550 recipient-rejected, redirect to `/partage/retry-email` instead of `recapitulatif`; student can correct address and resend or skip
diff --git a/app/public/assets/css/admin.css b/app/public/assets/css/admin.css
index e5ea1eb..b296932 100644
--- a/app/public/assets/css/admin.css
+++ b/app/public/assets/css/admin.css
@@ -29,10 +29,15 @@
 
 .admin-body header nav ul [data-nav-logout] a {
     opacity: 0.6;
+    display: flex;
+    align-items: center;
 }
 .admin-body header nav ul [data-nav-logout] a:hover {
     opacity: 1;
 }
+.admin-body header nav ul [data-nav-logout] a svg {
+    display: block;
+}
 
 /* Public-site link icon in admin nav */
 .admin-body header nav > a svg {
diff --git a/app/templates/header.php b/app/templates/header.php
index 789a515..d75a897 100644
--- a/app/templates/header.php
+++ b/app/templates/header.php
@@ -30,7 +30,7 @@ $_thesisId     = $_GET['id'] ?? null;
             <li><a href="/admin/edit.php?id=<?= intval($_thesisId) ?>" <?= $_currentPage === 'edit.php' ? 'aria-current="page"' : '' ?>>Modifier</a></li>
             <?php endif; ?>
             <?php if ($_isAdmin && AdminAuth::hasPassword()): ?>
-            <li data-nav-logout><a href="/admin/logout.php">Déconnexion</a></li>
+            <li data-nav-logout><a href="/admin/logout.php" aria-label="Déconnexion"><svg aria-hidden="true" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="currentColor" viewBox="0 0 256 256"><path d="M120,216a8,8,0,0,1-8,8H48a8,8,0,0,1-8-8V40a8,8,0,0,1,8-8h64a8,8,0,0,1,0,16H56V208h56A8,8,0,0,1,120,216Zm109.66-93.66-40-40a8,8,0,0,0-11.32,11.32L204.69,120H112a8,8,0,0,0,0,16h92.69l-26.35,26.34a8,8,0,0,0,11.32,11.32l40-40A8,8,0,0,0,229.66,122.34Z"></path></svg><span class="sr-only">Déconnexion</span></a></li>
             <?php endif; ?>
         </ul>
     </nav>