diff --git a/odoo-erp-automation-bootcamp/index.html b/odoo-erp-automation-bootcamp/index.html
index 8c3fda8..e11722c 100644
--- a/odoo-erp-automation-bootcamp/index.html
+++ b/odoo-erp-automation-bootcamp/index.html
@@ -137,6 +137,13 @@
         text-align: center;
         margin-top: 0.5rem;
       }
+      /* The three CTAs are native basket <form>s with a <button> (they were <a>s).
+         A <button> takes `line-height: normal` from the UA font shorthand while
+         the <a>s inherited the body line-height, which would make the button
+         5.6px shorter. Match the anchors' height: one declaration, no new look. */
+      form[action$="/shop/post_basket"] .btn {
+        line-height: inherit;
+      }
 
       /* Grids — auto-fit so no breakpoint is needed */
       .bc-list {
@@ -527,7 +534,11 @@
           <span class="hero-stat"><i aria-hidden="true">&#10003;</i> One year of Odoo Community Edition included</span>
         </div>
         <div class="hero-actions">
-          <a href="javascript:void(0)" class="btn btn-brass btn-lg btn-buy" data-id="12">Reserve your seat</a>
+          <form method="post" action="https://20.odoo4projects.com/shop/post_basket" target="_blank">
+            <input type="hidden" name="basket" value='[{"product_id":12,"qty":1}]' />
+            <input type="hidden" name="clear" value="1" />
+            <button type="submit" class="btn btn-brass btn-lg">Buy for 790 USD</button>
+          </form>
         </div>
       </div>
     </section>
@@ -546,7 +557,11 @@
         </p>
         <p class="bc-subline">Three months. Ten hours of teaching. One system that runs your company.</p>
         <div class="bc-action">
-          <a href="javascript:void(0)" class="btn btn-brass btn-lg btn-buy" data-id="12">Reserve your seat</a>
+          <form method="post" action="https://20.odoo4projects.com/shop/post_basket" target="_blank">
+            <input type="hidden" name="basket" value='[{"product_id":12,"qty":1}]' />
+            <input type="hidden" name="clear" value="1" />
+            <button type="submit" class="btn btn-brass btn-lg">Buy for 790 USD</button>
+          </form>
         </div>
       </div>
     </section>
@@ -715,7 +730,11 @@
           alumni community and the expert review.
         </p>
         <div class="bc-action">
-          <a href="javascript:void(0)" class="btn btn-brass btn-lg btn-buy" data-id="12">Reserve your seat</a>
+          <form method="post" action="https://20.odoo4projects.com/shop/post_basket" target="_blank">
+            <input type="hidden" name="basket" value='[{"product_id":12,"qty":1}]' />
+            <input type="hidden" name="clear" value="1" />
+            <button type="submit" class="btn btn-brass btn-lg">Buy for 790 USD</button>
+          </form>
         </div>
         <ul class="bc-related">
           <li><a href="/support.html#contact">Questions before you book? Talk to us first</a></li>
diff --git a/static/buy.js b/static/buy.js
index b9b9e0f..82bc938 100644
--- a/static/buy.js
+++ b/static/buy.js
@@ -1,10 +1,14 @@
-/* buy.js — page-local checkout helper.
+/* buy.js — page-local checkout helper (progressive enhancement).
  *
- * Mirrors `script.js` `buyNow()` — the main page's checkout path.
+ * The checkout itself is a native <form method="post" target="_blank"> that posts
+ * basket=[{"product_id":12,"qty":1}] + clear=1 to
+ * https://20.odoo4projects.com/shop/post_basket. With JavaScript off it still works.
+ *
+ * This file only adds attribution: on submit it appends the utm_* hidden inputs
+ * from the cookies, then lets the native submit proceed (it never preventDefault).
+ *
+ * The UTM helpers mirror `script.js` `buyNow()` — the main page's checkout path.
  * If that changes, change this too.
- *
- * Loaded by pages that do not load `script.js` (e.g. the bootcamp page).
- * Binds `.btn-buy` elements: <a class="btn-buy" data-id="12">…</a>.
  */
 (function () {
     'use strict';
@@ -29,7 +33,7 @@
         var stored = getStoredUTM();
         var keys = ['source', 'medium', 'campaign'];
         for (var i = 0; i < keys.length; i++) {
-            if (stored[keys[i]]) {
+            if (stored[keys[i]] && !form.elements['utm_' + keys[i]]) {
                 var input = document.createElement('input');
                 input.type = 'hidden';
                 input.name = 'utm_' + keys[i];
@@ -39,41 +43,13 @@
         }
     }
 
-    /* ---- Buy Now — POST basket via form, opens checkout in new tab ---- */
-    window.buyNow = function (productId) {
-        var form = document.createElement('form');
-        form.method = 'POST';
-        form.action = 'https://20.odoo4projects.com/shop/post_basket';
-        form.target = '_blank';
-        form.style.display = 'none';
-
-        var basket = document.createElement('input');
-        basket.type = 'hidden';
-        basket.name = 'basket';
-        basket.value = JSON.stringify([{ product_id: productId, qty: 1 }]);
-        form.appendChild(basket);
-
-        var clear = document.createElement('input');
-        clear.type = 'hidden';
-        clear.name = 'clear';
-        clear.value = '1';
-        form.appendChild(clear);
-
+    /* ---- Progressive enhancement: add UTM inputs to the native basket form ----
+       Capture phase, so the inputs are in the form before the browser serialises it.
+       No preventDefault — the native POST proceeds untouched. */
+    document.addEventListener('submit', function (e) {
+        var form = e.target;
+        if (!form || form.tagName !== 'FORM') return;
+        if (!form.querySelector('input[name="basket"]')) return;
         appendToForm(form);
-
-        document.body.appendChild(form);
-        form.submit();
-        document.body.removeChild(form);
-    };
-
-    /* ---- Bind .btn-buy (delegated: same contract as script.js) ---- */
-    document.addEventListener('click', function (e) {
-        var btn = e.target.closest ? e.target.closest('.btn-buy') : null;
-        if (!btn) return;
-        var id = btn.getAttribute('data-id');
-        if (id) {
-            e.preventDefault();
-            window.buyNow(parseInt(id, 10));
-        }
-    });
+    }, true);
 })();