diff --git a/README.md b/README.md
index 9b1737b..f2f6f76 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 ## ToDo
 
+- BUG?: for some reason toggling fullscreen on a mobile device changes 
+	font size...
 - Save current gallery (zip)
 - ~~Views: Gallery / Details / Lightbox~~
 - Details: populate fields
diff --git a/css/grid-n-view.css b/css/grid-n-view.css
index f309c64..4162e67 100644
--- a/css/grid-n-view.css
+++ b/css/grid-n-view.css
@@ -42,6 +42,11 @@
 	/*--lightbox-background-color: rgba(0,0,0,0.8);*/
 
 	--color-transition: 1s;
+
+
+	/* base font size... */
+	/* XXX can we use this as the basis for sizing for different devices??? */
+	font-size: 5mm;
 }
 
 .gallery-dark {