diff --git a/src/_includes/head/custom.html b/src/_includes/head/custom.html
index 893253ff..90a25585 100644
--- a/src/_includes/head/custom.html
+++ b/src/_includes/head/custom.html
@@ -3,7 +3,24 @@
 <link rel="apple-touch-icon" href="{{ '/assets/images/favicon.svg' | relative_url }}">
 
 <!-- Alpine.js x-cloak: hide elements until Alpine initializes -->
-<style>[x-cloak] { display: none !important; }</style>
+<!-- Kill Minimal Mistakes greedy-nav full-screen white backdrop overlay.
+     The theme's @supports rule (pointer-events:none) creates a fixed, page-wide
+     white ::before on .greedy-nav__toggle.close. We use Alpine.js for the menu,
+     so this overlay just blocks the page on mobile. -->
+<style>
+[x-cloak] { display: none !important; }
+.greedy-nav__toggle::before,
+.greedy-nav__toggle.close::before {
+  display: none !important;
+  content: none !important;
+}
+/* Prevent theme's .close class from hiding the navicon */
+.greedy-nav__toggle.close .navicon,
+.greedy-nav__toggle.close .navicon::before,
+.greedy-nav__toggle.close .navicon::after {
+  background: currentColor !important;
+}
+</style>
 
 <!-- Prevent FOUC: apply saved theme before any paint -->
 <script>
@@ -55,3 +72,15 @@
      scripts so Tabulator + ECharts are available when Alpine processes
      x-data directives and calls component boot() functions. -->
 <script defer src="https://cdn.jsdelivr.net/npm/alpinejs@3/dist/cdn.min.js"></script>
+
+<!-- Neutralise Minimal Mistakes greedy-nav jQuery click handler.
+     The theme's JS toggles .close on the burger button and shows .hidden-links,
+     causing a white overlay.  We use Alpine.js instead; unbind jQuery's handler
+     after all scripts have loaded so it cannot interfere. -->
+<script>
+window.addEventListener('load', function() {
+  if (window.jQuery) {
+    jQuery('nav.greedy-nav .greedy-nav__toggle').off('click');
+  }
+});
+</script>
diff --git a/src/assets/css/main.scss b/src/assets/css/main.scss
index 3bbcfb86..ccc83148 100644
--- a/src/assets/css/main.scss
+++ b/src/assets/css/main.scss
@@ -191,6 +191,14 @@ html {
   border: none;
   padding: 4px 8px;
   color: #333;
+
+  // Disable the theme's full-screen white backdrop overlay.
+  // The theme uses ::before on .greedy-nav__toggle.close to create a page-wide
+  // white overlay when .hidden-links is shown. Since we use Alpine.js for the
+  // hamburger menu instead, this overlay just blocks the page.
+  &::before {
+    display: none !important;
+  }
 }
 
 // Desktop (≥768px): show all items, keep hamburger visible