diff --git a/app/static/app.css b/app/static/app.css
index 25761b8..142e907 100644
--- a/app/static/app.css
+++ b/app/static/app.css
@@ -11,6 +11,7 @@
 }
 
 *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
+html { overflow-y: scroll; } /* scrollbar toujours présente → pas de décalage entre pages */
 body { font-family: 'Segoe UI', system-ui, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; display: flex; flex-direction: column; }
 main { flex: 1; }
 a { color: var(--blue); text-decoration: none; }