Stack usage cards vertically to prevent OCI command truncation

Author: attilaedelenyi

index.html

@@ -303,14 +303,10 @@
     /* ── usage section ── */
     .usage-grid {
       display: grid;
-      grid-template-columns: 1fr 1fr;
+      grid-template-columns: 1fr;
       gap: 1.5rem;
     }
 
-    @media (max-width: 640px) {
-      .usage-grid { grid-template-columns: 1fr; }
-    }
-
     .usage-card {
       background: var(--surface);
       border: 1px solid var(--border);