diff --git a/web/themes/custom/geofresco/src/templates/layout/page.html.twig b/web/themes/custom/geofresco/src/templates/layout/page.html.twig
index 8633cec..a418e45 100644
--- a/web/themes/custom/geofresco/src/templates/layout/page.html.twig
+++ b/web/themes/custom/geofresco/src/templates/layout/page.html.twig
@@ -19,7 +19,7 @@
 {# We put everything in Bulma columns so must do navbar in header block, not here #}
 {% endblock navbar %}
 {% block header %}
-<div class="header columns is-marginless">
+<div class="header columns is-mobile is-marginless">
   {% block navbar_branding %}
   {{ page.navbar_branding }}
   {% endblock navbar_branding %}