Update app.py

app.py

@@ -32,12 +32,13 @@ css = """
         justify-items: center;
     }
 
-    .custom-caption-1, .custom-caption-2, .survey, .survey-1, .survey-2 {
+    .custom-caption-1, .custom-caption-2, .survey, .survey-1, .survey-2, span {
         font-size: 20px;
         font-weight: bold;
         text-align: center;
         margin-top: 10px;
         color: black;
+        display: block;
     }
 
     .bottom-space {
@@ -48,6 +49,11 @@ css = """
         text-align: center;
     }
 
+    .stButton button {
+        display: block;
+        margin: 0 auto;
+    }
+
     @media only screen and (max-width: 768px) {
         .container {
             grid-template-columns: 1fr;