diff --git a/src/app_security.cpp b/src/app_security.cpp
index 029d97f..4fddf4f 100644
--- a/src/app_security.cpp
+++ b/src/app_security.cpp
@@ -793,6 +793,10 @@ void App::renderLockScreen() {
             cap.captureFrames--;
         }
         DrawFullWindowBlurBackdrop(dl, winPos, winMax, /*allowBlur=*/!justLocked);
+        // A lock screen should read as a clearly-dimmed "locked" state; the blur alone is light in a
+        // light theme, which washes out the card. Add a theme-independent dark scrim over the blur so
+        // the card pops in both themes (standard lock-screen dimming).
+        dl->AddRectFilled(winPos, winMax, IM_COL32(6, 8, 16, 140));
         MarkBlurOverlayDrawn(nullptr);  // suppress foreground theme-effect bleed + re-capture on unlock
     }