Guard pricing-coupon and UTM element access in script.js — fixes crash on pages without pricing section

assets/js/script.js

@@ -296,7 +296,8 @@ initServerLocations(); // fetch live server availability
   const params = new URLSearchParams(window.location.search);
   ["source", "medium", "campaign", "term", "content"].forEach(function (key) {
     const val = params.get("utm_" + key);
-    if (val) document.getElementById("utm_" + key).value = val;
+    const el = document.getElementById("utm_" + key);
+    if (val && el) el.value = val;
   });
 })();
 
@@ -754,9 +755,10 @@ function updateCouponBadges() {
     }
   });
 }
-document
+const pricingCoupon = document.getElementById("pricing-coupon");
-  .getElementById("pricing-coupon")
+if (pricingCoupon) {
-  .addEventListener("input", updateCouponBadges);
+  pricingCoupon.addEventListener("input", updateCouponBadges);
+}
 
 /* ── Blog ──────────────────────────────────────────────── */
 const BLOG_POSTS_PER_PAGE = 6;