diff --git a/poc4_active_source_20260714/src/poc4/hmm_ui.py b/poc4_active_source_20260714/src/poc4/hmm_ui.py
index 72cbf9a..5bc4363 100644
--- a/poc4_active_source_20260714/src/poc4/hmm_ui.py
+++ b/poc4_active_source_20260714/src/poc4/hmm_ui.py
@@ -7,7 +7,7 @@ html, body, [data-testid="stAppViewContainer"], .stApp {
   background:#fff !important; color:var(--hmm-ink) !important;
   font-family:"Noto Sans KR","Malgun Gothic",sans-serif;
 }
-#MainMenu, header [data-testid="stToolbar"] { display:none !important; }
+header[data-testid="stHeader"] { display:none !important; }
 .block-container { max-width:1180px; padding:2rem 3rem 4rem; }
 section[data-testid="stSidebar"], section[data-testid="stSidebar"] > div {
   background:#fff !important;