diff --git a/src/static_src/scss/_billboard.scss b/src/static_src/scss/_billboard.scss
index b53717a..069d1ad 100644
--- a/src/static_src/scss/_billboard.scss
+++ b/src/static_src/scss/_billboard.scss
@@ -611,7 +611,8 @@ body.page-billposts {
         width: var(--applet-card-w);
         aspect-ratio: 5 / 8;
         align-self: center;
-        background: rgba(var(--priUser), 0.8);
+        // Sprint A.7.5-polish-2 — unified 0.5 alpha across all stat-block surfaces.
+        background: rgba(var(--priUser), 0.5);
         border-radius: 0.4rem;
         border: 0.1rem solid rgba(var(--terUser), 0.15);
         padding: calc(var(--applet-card-w) * 0.08);
@@ -708,12 +709,11 @@ body.page-billposts {
     // --secUser stat block (light), w. --quiUser label + --priUser
     // keywords for contrast against the light bg.
     .my-sign-applet-body[data-polarity="gravity"] .my-sign-applet-stat-block {
-        background: rgba(var(--priUser), 1);
+        // Sprint A.7.5-polish-2 — bg override dropped; default 0.5 alpha
+        // applies in both polarities now that we've unified opacity across
+        // the 4 stat-block surfaces. Border + keyword color overrides kept
+        // because they specifically target the gravity card-pair convention.
         border-color: rgba(var(--secUser), 0.15);
-        // Sprint A.7.5 — label override removed; bg under gravity is still
-        // --priUser (just full alpha vs. the default 0.8), so the shared
-        // --secUser label is readable in both polarities + matches the new
-        // applet convention end-to-end.
         .stat-keywords li {
             color: rgba(var(--secUser), 1);
             border-bottom-color: rgba(var(--secUser), 0.18);
diff --git a/src/static_src/scss/_card-deck.scss b/src/static_src/scss/_card-deck.scss
index 5949e3a..3ceac27 100644
--- a/src/static_src/scss/_card-deck.scss
+++ b/src/static_src/scss/_card-deck.scss
@@ -363,7 +363,10 @@
 // branch since both now sit on --priUser bg.
 .tarot-fan-wrap[data-polarity="gravity"] .fan-stage-block,
 .tarot-fan-wrap[data-polarity="levity"]  .fan-stage-block {
-    background: rgba(var(--priUser), 1);
+    // Sprint A.7.5-polish-2 — alpha unified to 0.5 across all 4 stat-block
+    // surfaces (sig + sea + fan + applet) to match the my_sign main page's
+    // existing `rgba(var(--priUser), 0.5)` per user-spec 2026-05-25 PM.
+    background: rgba(var(--priUser), 0.5);
     border-color: rgba(var(--terUser), 0.15);
     color: rgba(var(--secUser), 1);
     .stat-face-label   { color: rgba(var(--secUser), 1); }
@@ -2114,7 +2117,8 @@ $_sea-title-els: '.fan-card-name, .sig-qualifier-above, .sig-qualifier-below, .f
     flex: 0 0 auto;
     width: var(--sig-card-w, 140px);
     height: calc(var(--sig-card-w, 140px) * 8 / 5);
-    background: rgba(var(--priUser), 0.85);
+    // Sprint A.7.5-polish-2 — unified 0.5 alpha across all stat-block surfaces.
+    background: rgba(var(--priUser), 0.5);
     border-radius: 0.4rem;
     border: 0.1rem solid rgba(var(--terUser), 0.15);
     position: relative;
@@ -2141,7 +2145,8 @@ $_sea-title-els: '.fan-card-name, .sig-qualifier-above, .sig-qualifier-below, .f
 // bg now; the original opposite-polarity inversion is dropped.
 .sea-stage--gravity .sea-stat-block,
 .sea-stage--levity  .sea-stat-block {
-    background: rgba(var(--priUser), 0.85);
+    // Sprint A.7.5-polish-2 — unified 0.5 alpha across all stat-block surfaces.
+    background: rgba(var(--priUser), 0.5);
     border-color: rgba(var(--terUser), 0.15);
     .stat-face-label { color: rgba(var(--secUser), 1); }
     .stat-keywords li {