Fix: move css param from launch() to Blocks() for Gradio 5.x compat

app.py

@@ -277,7 +277,7 @@ _sat_fig, _street_fig = get_static_maps()
 _temp_placeholder = plot_temperature_placeholder()
 logger.info("Basemaps ready.")
 
-with gr.Blocks(title="Tufts Jumbo Weather Forecast") as demo:
+with gr.Blocks(title="Tufts Jumbo Weather Forecast", css=CUSTOM_CSS) as demo:
 
     # ── Top bar ───────────────────────────────────────────────────
     gr.HTML(
@@ -353,4 +353,4 @@ if __name__ == "__main__":
     except Exception as e:
         logger.warning(f"Pre-load failed: {e}")
 
-    demo.launch(share=False, css=CUSTOM_CSS)
+    demo.launch(share=False)