diff --git a/poc4_active_source_20260714/src/agent_console/presentation.py b/poc4_active_source_20260714/src/agent_console/presentation.py
index 3400ce7..abc6b64 100644
--- a/poc4_active_source_20260714/src/agent_console/presentation.py
+++ b/poc4_active_source_20260714/src/agent_console/presentation.py
@@ -63,6 +63,17 @@ def apply_console_theme(st: Any, profile: AppProfile) -> None:
         details > summary *, details > summary::marker {{
           color:var(--console-text) !important;
           -webkit-text-fill-color:var(--console-text) !important; }}
+        [data-testid="stExpander"] > details,
+        [data-testid="stExpander"] > details > summary,
+        [data-testid="stExpander"] > details > summary > div,
+        [data-testid="stExpander"] > details > summary > div > div {{
+          background:#fff !important; color:var(--console-text) !important;
+          border-color:var(--console-border) !important; }}
+        [data-testid="stExpander"] > details > summary *,
+        [data-testid="stExpander"] > details > summary svg {{
+          color:var(--console-text) !important; fill:var(--console-text) !important;
+          stroke:var(--console-text) !important;
+          -webkit-text-fill-color:var(--console-text) !important; }}
         div[data-testid="stButton"] > button, div[data-testid="stFormSubmitButton"] > button {{
           background:#fff !important; color:var(--console-text) !important;
           -webkit-text-fill-color:var(--console-text) !important;