diff --git a/frontend/src/styles/global.css b/frontend/src/styles/global.css
index 9e76047..99ca049 100644
--- a/frontend/src/styles/global.css
+++ b/frontend/src/styles/global.css
@@ -2238,6 +2238,15 @@ html.cybersigil body::after {
 .cybersigil .plate:hover .plate-caption-title {
   text-shadow: -1px 0 0 var(--sky), 1px 0 0 var(--mauve);
 }
+/* The plate-fade-up entrance leaves `transform: translateY(0)` (forwards)
+ * permanently on .plate-enter — a stacking context that traps the lifted
+ * images below the fixed FX. Raise the whole entrance wrapper (catalogue
+ * tiles AND the post-page article) above the ambient layer so the looping
+ * background sigil can no longer bleed through any post image. */
+.cybersigil .plate-enter {
+  position: relative;
+  z-index: 13;
+}
 /* Lift the imagery clear of the ambient FX/grain so photos read solid —
  * only the hover sigil (cs-plate-sig, z-index above this) sits over them. */
 .cybersigil .plate-image {