diff --git a/src/components/Constellation.astro b/src/components/Constellation.astro
index 6b82993..57b8c12 100644
--- a/src/components/Constellation.astro
+++ b/src/components/Constellation.astro
@@ -143,14 +143,14 @@
   <rect class="plate plate--dim" x="412" y="570" width="80" height="20" rx="3"></rect>
   <text class="lbl lbl--dim" x="452" y="584" text-anchor="middle">elfastc</text>
 
-  <!-- ── key: compute colours ── -->
+  <!-- ── key: compute colours (right side — left edge clips on narrow heroes) ── -->
   <g aria-label="compute colour key">
-    <rect class="core--mag" x="40" y="572" width="8" height="8" rx="2"></rect>
-    <text class="cap cap--key" x="54" y="580">nvidia compute</text>
-    <rect class="core--intel" x="40" y="592" width="8" height="8" rx="2"></rect>
-    <text class="cap cap--key" x="54" y="600">intel compute</text>
-    <rect class="core--cyan" x="40" y="612" width="8" height="8" rx="2"></rect>
-    <text class="cap cap--key" x="54" y="620">core / services</text>
+    <rect class="core--mag" x="620" y="572" width="8" height="8" rx="2"></rect>
+    <text class="cap cap--key" x="634" y="580">nvidia compute</text>
+    <rect class="core--intel" x="620" y="592" width="8" height="8" rx="2"></rect>
+    <text class="cap cap--key" x="634" y="600">intel compute</text>
+    <rect class="key--bat" x="620" y="612" width="8" height="8" rx="2"></rect>
+    <text class="cap cap--key" x="634" y="620">core / services</text>
   </g>
 </svg>
 
@@ -231,6 +231,13 @@
   }
   .cap--dim { fill: #5c6a82; font-size: 9px; }
   .cap--key { fill: #7e8ba1; font-size: 9px; }
+  /* gloss bat-black with a faint gold ring — the batcave swatch for core/services */
+  .key--bat {
+    fill: #10131c;
+    stroke: rgba(245, 197, 24, 0.55);
+    stroke-width: 1;
+    filter: drop-shadow(0 0 4px rgba(245, 197, 24, 0.35));
+  }
 
   /* radar ring off the hub */
   .ring {