Fix gauge plot rendering

app.py

@@ -241,9 +241,10 @@ def analyze_text(text):
     ))
 
     fig.update_layout(
-        height=250,
-        margin={'l': 20, 'r': 20, 't': 40, 'b': 20},
-        paper_bgcolor='rgba(0,0,0,0)',
+        height=300,
+        width=400,
+        margin={'l': 30, 'r': 30, 't': 50, 'b': 30},
+        paper_bgcolor='white',
         font={'color': '#666'}
     )