diff --git a/app/(core)/components/Popup.tsx b/app/(core)/components/Popup.tsx
index 15ea2a7..9491955 100644
--- a/app/(core)/components/Popup.tsx
+++ b/app/(core)/components/Popup.tsx
@@ -93,9 +93,19 @@ const Popup: React.FC<PopupProps & { children?: React.ReactNode }> = ({
       <div
         className={`popup-container ${isOpen ? "popup-enter" : "popup-exit"}`}
       >
-        <h2 className="ph-hero__title">{title}</h2>
-        {description && <p className="ph-hero__subtitle">{description}</p>}
-
+        <div className="popup-header">
+          <div>
+            <h2 className="ph-hero__title">{title}</h2>
+            {description && <p className="ph-hero__subtitle">{description}</p>}
+          </div>
+          <button
+            onClick={onClose}
+            className="popup-close-btn ph-btn ph-btn--ghost"
+            aria-label="Close modal"
+          >
+            Close
+          </button>
+        </div>
         <div className="popup-custom-content">{children}</div>
 
         <div className="popup-buttons">
@@ -108,9 +118,6 @@ const Popup: React.FC<PopupProps & { children?: React.ReactNode }> = ({
               {btn.label}
             </a>
           ))}
-          <a onClick={onClose} className="ph-btn ph-btn--ghost">
-            Close
-          </a>
         </div>
       </div>
     </div>
diff --git a/app/(core)/styles/popup.css b/app/(core)/styles/popup.css
index a9b441b..c61916d 100644
--- a/app/(core)/styles/popup.css
+++ b/app/(core)/styles/popup.css
@@ -67,6 +67,18 @@
   cursor: pointer;
 }
 
+.popup-header {
+  position: relative;
+  margin-bottom: 1rem;
+}
+
+.popup-close-btn {
+  position: absolute;
+  top: 0;
+  right: 0;
+  margin-top: 1.5rem;
+}
+
 .feedback-form {
   margin: 20px 0;
   display: flex;
diff --git a/public/sitemap.xml b/public/sitemap.xml
index ed6f324..2080bf6 100644
--- a/public/sitemap.xml
+++ b/public/sitemap.xml
@@ -91,7 +91,7 @@
     <priority>0.8</priority>
   </url>
   <url>
-    <loc>https://physicshub.github.io/blog/physics-pendulum-comprehensive-educational-guide</loc>
+    <loc>https://physicshub.github.io/blog/physics-of-pendulum-explained</loc>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>