diff --git a/src/apprt/gtk/Surface.zig b/src/apprt/gtk/Surface.zig
index f6ecce8ec..d47bc9800 100644
--- a/src/apprt/gtk/Surface.zig
+++ b/src/apprt/gtk/Surface.zig
@@ -917,6 +917,8 @@ pub fn mouseOverLink(self: *Surface, uri_: ?[]const u8) void {
 
     // Create the widget
     const label = c.gtk_label_new(uriZ.ptr);
+    c.gtk_widget_add_css_class(@ptrCast(label), "view");
+    c.gtk_widget_add_css_class(@ptrCast(label), "url-overlay");
     c.gtk_widget_set_halign(label, c.GTK_ALIGN_START);
     c.gtk_widget_set_valign(label, c.GTK_ALIGN_END);
     c.gtk_widget_set_margin_bottom(label, 2);
diff --git a/src/apprt/gtk/style.css b/src/apprt/gtk/style.css
index e69de29bb..6857b15bf 100644
--- a/src/apprt/gtk/style.css
+++ b/src/apprt/gtk/style.css
@@ -0,0 +1,3 @@
+label.url-overlay {
+  padding: 2px;
+}