diff --git a/src/static_src/scss/_card-deck.scss b/src/static_src/scss/_card-deck.scss
index e6f5857..89ce7d4 100644
--- a/src/static_src/scss/_card-deck.scss
+++ b/src/static_src/scss/_card-deck.scss
@@ -2061,13 +2061,14 @@ $_sea-card-glow: 0 0 0.5rem 0.5rem rgba(var(--ninUser), 0.3), 0 0 0.4rem rgba(0,
 
 // Deck backs — face-down pile colour identifies polarity
 $_sea-shadow: 1px 2px 0 rgba(0,0,0,0.7), 0 4px 0 rgba(0,0,0,0.18), 2px 5px 5px rgba(0,0,0,0.5);
-// Levity + gravity stack glows mirror the spread-card halo's tuned geometry
-// ($_sea-card-glow, user-tuned 2026-05-30: 0.5rem blur / 0.5rem spread / 0.3
-// alpha) so the deck glows read identically to the card halo — each keeps its
-// own polarity colour (--ninUser / --quaUser). Duplicated literally (not
-// shared) so each stays independently tunable. (single keeps its own tone.)
+// All deck stacks (levity / gravity / single) share the spread-card halo's
+// tuned --ninUser glow ($_sea-card-glow, user-tuned 2026-05-30: 0.5rem blur /
+// 0.5rem spread / 0.3 alpha) so EVERY deck reads identically to the card halo
+// (user-spec "make every deck match" 2026-05-30). Kept as three per-deck vars
+// (not one shared) so each stays independently tunable later.
 $_glow-levity:  0 0 0.5rem 0.5rem rgba(var(--ninUser), 0.3);
 $_glow-gravity: 0 0 0.5rem 0.5rem rgba(var(--ninUser), 0.3);
+$_glow-single:  0 0 0.5rem 0.5rem rgba(var(--ninUser), 0.3);
 
 .sea-deck-stack--levity .sea-stack-face {
     background: rgba(var(--terUser), 0.88);
@@ -2121,14 +2122,15 @@ $_glow-gravity: 0 0 0.5rem 0.5rem rgba(var(--ninUser), 0.3);
 .sea-deck-stack--gravity:hover .sea-stack-face,
 .sea-deck-stack--gravity:active .sea-stack-face,
 .sea-deck-stack--gravity.sea-deck-stack--active .sea-stack-face { box-shadow: $_sea-shadow, $_glow-gravity; }
-// Single-stack hover/active glow — neutral --terUser tone vs. gravity's
-// --quaUser + levity's --ninUser, matching the face border color.
+// Single-stack hover/active glow — now the same --ninUser halo as levity +
+// gravity (user-spec "make every deck match" 2026-05-30). The face keeps its
+// neutral --terUser hover border (the monodeck's own tone vs. the polarized
+// stacks' coloured borders).
 .sea-deck-stack--single:hover .sea-stack-face,
 .sea-deck-stack--single:active .sea-stack-face,
 .sea-deck-stack--single.sea-deck-stack--active .sea-stack-face {
-    box-shadow: $_sea-shadow, 0 0 0.8rem 0.15rem rgba(var(--terUser), 0.6);
+    box-shadow: $_sea-shadow, $_glow-single;
     border-color: rgba(var(--terUser), 1) !important;
-
 }
 
 // Form action row — LOCK HAND + DEL side by side at the bottom