diff --git a/src/ui/material/draw_helpers.h b/src/ui/material/draw_helpers.h
index d323d1e..6e3a83e 100644
--- a/src/ui/material/draw_helpers.h
+++ b/src/ui/material/draw_helpers.h
@@ -1135,6 +1135,16 @@ inline std::string g_overlayCurrentKey;
 // so every overlay shares one backdrop tone. `opacity` is the alpha (dialogs vary it per call).
 inline ImVec4 OverlayScrimColor(float opacity) { return ImVec4(0.04f, 0.04f, 0.06f, opacity); }
 
+// True when the active theme is light (app background luminance is high). Used to add extra
+// separation where light-on-light would otherwise be low-contrast.
+inline bool IsLightTheme() {
+    ImU32 bg = Background();
+    float r = ((bg >> IM_COL32_R_SHIFT) & 0xFF) / 255.0f;
+    float g = ((bg >> IM_COL32_G_SHIFT) & 0xFF) / 255.0f;
+    float b = ((bg >> IM_COL32_B_SHIFT) & 0xFF) / 255.0f;
+    return (0.299f * r + 0.587f * g + 0.114f * b) > 0.5f;
+}
+
 // Style of an overlay dialog. GlassCard = the classic scrim + glass card + boxed title bar.
 // BlurFloat = the "Manage Portfolio" look: live-blur backdrop + floating content + plain heading.
 enum class OverlayStyle { GlassCard, BlurFloat };
@@ -1263,6 +1273,12 @@ inline bool BeginOverlayDialog(const OverlayDialogSpec& spec)
         GlassPanelSpec cardGlass;
         cardGlass.rounding = 16.0f; cardGlass.fillAlpha = 35; cardGlass.borderAlpha = 50; cardGlass.borderWidth = 1.0f;
         DrawGlassPanel(dl, cardMin, cardMax, cardGlass);
+    } else if (IsLightTheme()) {
+        // Floating content has no card, so in a LIGHT theme it sits light-on-light with almost no
+        // separation. Give it a faint elevated sheet + a defining edge for contrast (kept translucent
+        // to preserve the airy "floating" feel; dark themes already read fine, so they're unchanged).
+        dl->AddRectFilled(cardMin, cardMax, WithAlpha(Surface(), 60), 20.0f);
+        dl->AddRect(cardMin, cardMax, WithAlpha(OnSurface(), 55), 20.0f, 0, 1.5f);
     }
 
     // Click outside the card dismisses — but not on the appearing frame (the opening click) or while