diff --git a/files b/files
index a9b203a..a281e17 100644
--- a/files
+++ b/files
@@ -1 +1,2 @@
+index.html
 main.js
diff --git a/index.html b/index.html
index c2f7412..11811fa 100644
--- a/index.html
+++ b/index.html
@@ -11,7 +11,7 @@
 <body>
   <div class="container py-4 chat-wrap">
     <nav class="navbar navbar-expand-lg navbar-dark bg-dark rounded mb-3 px-3">
-      <a class="navbar-brand" href="#">FMF GPT</a>
+      <a class="navbar-brand" href="#">FMF-GPT</a>
     
       <button class="navbar-toggler" type="button" data-bs-toggle="collapse"
               data-bs-target="#topNav" aria-controls="topNav"
@@ -20,12 +20,12 @@
       </button>
     
       <div class="collapse navbar-collapse" id="topNav">
-        <ul class="navbar-nav me-auto mb-2 mb-lg-0">
+        <ul class="navbar-nav me-auto mb-2 mb-lg-0 nav-tab">
           <li class="nav-item">
-            <a class="nav-link active" href="#chat">Chat</a>
+            <a class="nav-link active" href="#chatPage" data-page="chatPage">Chat</a>
           </li>
           <li class="nav-item">
-            <a class="nav-link" href="#systemAcc">System</a>
+            <a class="nav-link" href="#systemAcc" data-page="systemAcc">System</a>
           </li>
         </ul>
     
@@ -37,58 +37,63 @@
         </div>
       </div>
     </nav>
-
-    <div class="accordion mb-3" id="systemAcc">
-      <div class="accordion-item">
-        <h2 class="accordion-header" id="headingOne">
-          <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseOne" aria-expanded="false" aria-controls="collapseOne">
-            System prompt (optional)
-          </button>
-        </h2>
-        <div id="collapseOne" class="accordion-collapse collapse" aria-labelledby="headingOne" data-bs-parent="#systemAcc">
-          <div class="accordion-body">
-            <textarea id="systemInput" class="form-control" rows="3" placeholder="You are a concise assistant that..."><?= $systemPrefill ?></textarea>
-            <div class="form-text">Saved in the session and applied to each message until changed.</div>
-          </div>
-        </div>
-      </div>
-    </div>
-
-    <div id="chat" class="chat-box p-3 mb-3 text-white">
-      <?php if (!$history): ?>
-        <div class="text-secondary">Start the conversation below…</div>
-      <?php else: ?>
-        <?php foreach ($history as $m): ?>
-          <?php
-            $role = htmlspecialchars($m['role'] ?? '', ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
-            $ts   = (int)($m['ts'] ?? time());
-          ?>
-          <div class="msg <?= $role ?>">
-            <div class="content">
-              <?php if ($role === 'assistant' && !empty($m['content_html'])): ?>
-                <!-- Assistant: already sanitized HTML -->
-                <?= $m['content_html'] ?>
-              <?php else: ?>
-                <!-- User (or legacy items): escape + preserve newlines -->
-                <?= nl2br(htmlspecialchars($m['content'] ?? '', ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8'), false) ?>
-              <?php endif; ?>
+    <div id="pageWrapper" class="tab-content">
+      <div class="tab-pane page" id="systemAcc" role="tabpanel">
+        <div class="accordion mb-3">
+          <div class="accordion-item">
+            <h2 class="accordion-header" id="headingOne">
+              <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseOne" aria-expanded="false" aria-controls="collapseOne">
+                System prompt (optional)
+              </button>
+            </h2>
+            <div id="collapseOne" class="accordion-collapse collapse" aria-labelledby="headingOne" data-bs-parent="#systemAcc">
+              <div class="accordion-body">
+                <textarea id="systemInput" class="form-control" rows="3" placeholder="You are a concise assistant that..."><?= $systemPrefill ?></textarea>
+                <div class="form-text">Saved in the session and applied to each message until changed.</div>
+              </div>
             </div>
-            <div class="time"><?= date('H:i', $ts) ?></div>
           </div>
-        <?php endforeach; ?>
-      <?php endif; ?>
-    </div>
+        </div>
+      </div><!-- /#systemAcc -->
 
-    <form id="chatForm" class="card shadow-sm">
-      <div class="card-body">
-        <div class="mb-2">
-          <textarea id="messageInput" class="form-control" rows="3" placeholder="Ask something… (Shift+Enter for newline)" required></textarea>
-        </div>
-        <div class="d-flex gap-2">
-          <button id="sendBtn" type="submit" class="btn btn-primary">Send</button>
-        </div>
-      </div>
-    </form>
+      <div id="chatPage" class="tab-pane page active show">
+        <div id="chat" class="chat-box p-3 mb-3 text-white">
+          <?php if (!$history): ?>
+            <div class="text-secondary">Start the conversation below…</div>
+          <?php else: ?>
+            <?php foreach ($history as $m): ?>
+              <?php
+                $role = htmlspecialchars($m['role'] ?? '', ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
+                $ts   = (int)($m['ts'] ?? time());
+              ?>
+              <div class="msg <?= $role ?>">
+                <div class="content">
+                  <?php if ($role === 'assistant' && !empty($m['content_html'])): ?>
+                    <!-- Assistant: already sanitized HTML -->
+                    <?= $m['content_html'] ?>
+                  <?php else: ?>
+                    <!-- User (or legacy items): escape + preserve newlines -->
+                    <?= nl2br(htmlspecialchars($m['content'] ?? '', ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8'), false) ?>
+                  <?php endif; ?>
+                </div>
+                <div class="time"><?= date('H:i', $ts) ?></div>
+              </div>
+            <?php endforeach; ?>
+          <?php endif; ?>
+        </div><!-- /.chat-box -->
+
+        <form id="chatForm" class="card shadow-sm">
+          <div class="card-body">
+            <div class="mb-2">
+              <textarea id="messageInput" class="form-control" rows="3" placeholder="Ask something… (Shift+Enter for newline)" required></textarea>
+            </div>
+            <div class="d-flex gap-2">
+              <button id="sendBtn" type="submit" class="btn btn-primary">Send</button>
+            </div>
+          </div>
+        </form><!-- /#chatForm -->
+      </div><!-- /#chat -->
+    </div><!-- /#pageWrapper -->
   </div>
 
   <script>
diff --git a/main.css b/main.css
index 0e48b80..19a6ed5 100644
--- a/main.css
+++ b/main.css
@@ -209,3 +209,18 @@ html:not([data-theme="light"]) .btn-outline-light {
 html:not([data-theme="light"]) .btn-outline-light:hover {
   background-color: rgba(255,255,255,0.12) !important;
 }
+
+/* Vanilla pages system (fixed) */
+.tab-content .page {
+  display: none;
+  opacity: 0;
+  transition: opacity 200ms ease;
+}
+
+.tab-content .page.active {
+  display: block;    /* stays at opacity: 0 until .show is added */
+}
+
+.tab-content .page.show {
+  opacity: 1;
+}
diff --git a/main.js b/main.js
index 45a73ae..4d2416e 100644
--- a/main.js
+++ b/main.js
@@ -110,3 +110,79 @@ $(function () {
     }
   });
 });
+
+  // ========= Vanilla JS Page Switching (fixed) =========
+  (function () {
+    const navLinks = document.querySelectorAll('.nav-tab .nav-link[data-page]');
+    const pages = document.querySelectorAll('#pageWrapper .page');
+    const DURATION = 200; // keep in sync with CSS
+
+    function getActivePage() {
+      return document.querySelector('#pageWrapper .page.active');
+    }
+
+    function setActiveNav(targetId) {
+      navLinks.forEach(a => {
+        const isActive = a.getAttribute('data-page') === targetId;
+        a.classList.toggle('active', isActive);
+        a.setAttribute('aria-current', isActive ? 'page' : 'false');
+      });
+    }
+
+    function showPage(targetId) {
+      const current = getActivePage();
+      const next = document.getElementById(targetId);
+      if (!next || current === next) return;
+
+      // Prepare next: visible container, but still transparent
+      next.classList.add('active'); // display:block; opacity:0
+
+      // Fade-in next on the next frame
+      requestAnimationFrame(() => {
+        next.classList.add('show'); // opacity -> 1 (transition)
+      });
+
+      // Fade-out current (if any)
+      if (current) {
+        current.classList.remove('show'); // opacity -> 0 (transition)
+
+        let cleaned = false;
+        const cleanup = () => {
+          if (cleaned) return;
+          cleaned = true;
+          current.classList.remove('active');
+          current.removeEventListener('transitionend', onEnd);
+        };
+
+        const onEnd = (e) => {
+          if (e.target === current && e.propertyName === 'opacity') {
+            cleanup();
+          }
+        };
+
+        current.addEventListener('transitionend', onEnd);
+        // Fallback in case transitionend doesn't fire (reduced motion, etc.)
+        setTimeout(cleanup, DURATION + 50);
+      }
+
+      setActiveNav(targetId);
+      history.replaceState(null, '', '#' + targetId);
+    }
+
+    // Click handlers
+    navLinks.forEach(link => {
+      link.addEventListener('click', (ev) => {
+        ev.preventDefault();
+        const targetId = link.getAttribute('data-page');
+        showPage(targetId);
+      });
+    });
+
+    // Initial page from hash
+    const initial = (location.hash || '#chat').slice(1);
+    if (initial !== 'chat' && document.getElementById(initial)) {
+      showPage(initial);
+    } else {
+      setActiveNav('chat');
+    }
+  })();
diff --git a/ticket b/ticket
index 2bb0138..18807c9 100644
--- a/ticket
+++ b/ticket
@@ -1 +1 @@
-give me a drop-in replacement that uses jQuery
+fix the "page switching" system. make it pure javascript. all pages are loaded in DOM/HTML but hidden. use a vanilla js system. when user clicks on navbar item, page fades and switches.
