diff --git a/app.py b/app.py
index e2eed6b..093ac7e 100644
--- a/app.py
+++ b/app.py
@@ -644,26 +644,22 @@ def render_admin():
     stage_order = list(VALID_STAGES)  # ("intro", "topics", "vote")
     idx = stage_order.index(cur) if cur in stage_order else 0
 
-    sc1, sc2, sc3 = st.columns(3)
+    sc1, sc2 = st.columns(2)
     with sc1:
-        if st.button("← 이전 stage", disabled=(idx == 0)):
+        if st.button(
+            "← 이전 stage",
+            disabled=(idx == 0),
+            use_container_width=True,
+        ):
             set_stage(stage_order[idx - 1])
             st.rerun()
     with sc2:
-        chosen = st.radio(
-            "직접 선택",
-            stage_order,
-            index=idx,
-            horizontal=True,
-            label_visibility="collapsed",
-            key="stage_radio",
-        )
-        if chosen != cur:
-            if st.button("적용", key="stage_apply"):
-                set_stage(chosen)
-                st.rerun()
-    with sc3:
-        if st.button("다음 stage →", disabled=(idx == len(stage_order) - 1)):
+        if st.button(
+            "다음 stage →",
+            disabled=(idx == len(stage_order) - 1),
+            type="primary",
+            use_container_width=True,
+        ):
             set_stage(stage_order[idx + 1])
             st.rerun()