diff --git a/pyzebra/app/main.py b/pyzebra/app/main.py
index bacd8d2..0b53fa9 100644
--- a/pyzebra/app/main.py
+++ b/pyzebra/app/main.py
@@ -100,7 +100,8 @@ doc.add_root(
                 panel_param_study.create(),
                 panel_hdf_param_study.create(),
                 panel_spind.create(),
-            ]
+            ],
+            css_variables={"font-size": "15px"},
         ),
         log_textareainput,
         sizing_mode="stretch_height",