diff --git a/.gitignore b/.gitignore
index 73bf680..413105a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,6 +14,9 @@ next-env.d.ts
 test-pb.mjs
 tsconfig.tsbuildinfo
 
+# mobile-checklist screenshots (AGENTS.md Round 4 — regenerate on every pass)
+.verify/
+
 # next-pwa build artifacts (generated into public/ on every build)
 public/sw.js
 public/sw.js.map
diff --git a/components/MachineCombobox.tsx b/components/MachineCombobox.tsx
index 813dfc6..a1fa2b5 100644
--- a/components/MachineCombobox.tsx
+++ b/components/MachineCombobox.tsx
@@ -238,7 +238,7 @@ export function MachineCombobox({
             width: Math.max(anchor.width, menuWidth),
             zIndex: 1300,
           }}
-          className="rounded-xl bg-white dark:bg-[#1a222b] border border-gray-200 dark:border-white/10 shadow-2xl overflow-hidden"
+          className="rounded-xl bg-white dark:bg-surface border border-gray-200 dark:border-white/10 shadow-2xl overflow-hidden"
         >
           <div className="px-3 py-2 text-xs text-gray-500 dark:text-gray-400 border-b border-gray-100 dark:border-white/5">
             {groups.flat.length} of {machines.length} machines