Update app.py

app.py

@@ -142,6 +142,10 @@ css = """
         }
         #record_btn{
             
+        }
+        #record_btn > div > button > span {
+            width: 2.375rem;
+            height: 2.375rem;
         }
         #record_btn > div > button > span > span {
             width: 2.375rem;