Center the git illustration in the marketing hero

- Stretch the grid rows so the visual column matches the text height
- Center the image wrapper and constrain the illustration with contain sizing

Author: notkainoa

apps/marketing/src/pages/index.astro

@@ -858,22 +858,31 @@ const mobileEndorsementRows = [
   .git-inner {
     display: grid;
     grid-template-columns: 1.1fr 1fr;
-    gap: 64px; align-items: center;
+    gap: 64px; align-items: stretch;
   }
 
   .git-visual {
     position: relative;
     display: flex;
+    align-items: center;
+    justify-content: center;
   }
 
   .git-image-shell {
     width: 100%;
+    height: 100%;
+    display: flex;
+    align-items: center;
+    justify-content: center;
   }
 
   .git-image {
     display: block;
-    width: 100%;
+    max-width: 92%;
+    max-height: 100%;
+    width: auto;
     height: auto;
+    object-fit: contain;
   }
 
   /* ── Open source ──────────────────────────────────────── */