Update index.html

Author: m-ghasempr

index.html

@@ -820,13 +820,13 @@ <h3 style="font-size: 2rem; color: #2c3e50; margin-bottom: 10px; text-align: cen
           }</code></pre>
 
           <button onclick="copyBibtex()" 
-            style="position: absolute; top: 12px; right: 12px; background-color: #007BFF; color: white; border: none; padding: 6px 12px; font-size: 13px; border-radius: 6px; cursor: pointer; transition: background-color 0.3s;">
+            style="position: absolute; bottom: 12px; right: 12px; background-color: #007BFF; color: white; border: none; padding: 6px 12px; font-size: 13px; border-radius: 6px; cursor: pointer; transition: background-color 0.3s;">
             Copy BibTeX
           </button>
 
           <span id="copy-status" style="
             position: absolute;
-            top: 18px;
+            bottom: 18px;
             right: 130px;
             font-size: 13px;
             color: green;