diff --git a/articles/frelon_asiatique_evolution.html b/articles/articles/frelon_asiatique_evolution.html
similarity index 100%
rename from articles/frelon_asiatique_evolution.html
rename to articles/articles/frelon_asiatique_evolution.html
diff --git a/exercices/TP_Nuisibles.html b/exercices/TP_Nuisibles.html
index acc7667..c9a9eb2 100644
--- a/exercices/TP_Nuisibles.html
+++ b/exercices/TP_Nuisibles.html
@@ -17,6 +17,7 @@
   justify-content: center;
   padding: 2rem;
   padding-top: calc(70px + 2rem);
+  padding-bottom: calc(52px + 2rem);
   opacity: 0;
   transition: opacity 0.4s ease;
   overflow-y: auto;
@@ -51,31 +52,59 @@
   z-index: 100;
 }
 
+/* BOTTOM BAR */
+.bottom-bar {
+  position: fixed;
+  bottom: 0; left: 0; right: 0;
+  height: 52px;
+  background: rgba(250, 238, 218, 0.98);
+  border-top: 2px solid var(--amber);
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 0 20px;
+  z-index: 100;
+  backdrop-filter: blur(10px);
+}
+
 /* SLIDE NAV */
 .slide-counter {
-  position: fixed;
-  bottom: 20px; right: 20px;
   font-size: 12px;
-  color: var(--text-muted);
-  z-index: 100;
+  font-family: 'Syne', sans-serif;
+  font-weight: 600;
+  color: var(--amber-dark);
 }
 
 /* BACK BUTTON */
 .back-btn {
-  position: fixed;
-  bottom: 20px; left: 20px;
   background: none;
-  border: 0.5px solid var(--border);
+  border: 0.5px solid var(--amber);
   border-radius: 20px;
   padding: 6px 16px;
   font-size: 12px;
-  color: var(--text-muted);
+  color: var(--amber-dark);
   cursor: pointer;
-  z-index: 100;
   transition: all 0.2s;
   font-family: 'DM Sans', sans-serif;
 }
-.back-btn:hover { background: rgba(0,0,0,0.05); }
+.back-btn:hover { background: rgba(186,117,23,0.08); }
+
+/* FORMATEUR SELECTOR */
+.formateur-btn {
+  font-family: 'Syne', sans-serif;
+  font-size: 14px;
+  font-weight: 600;
+  padding: 10px 24px;
+  border-radius: 30px;
+  border: 1.5px solid var(--border);
+  background: white;
+  color: var(--text-muted);
+  cursor: pointer;
+  transition: all 0.2s;
+  flex: 1;
+}
+.formateur-btn:hover { border-color: var(--amber); color: var(--amber); }
+.formateur-btn.selected { background: var(--amber-light); border-color: var(--amber); color: var(--amber-dark); font-weight: 700; }
 
 /* CARDS & BUTTONS */
 .btn {
@@ -577,7 +606,7 @@
 /* SCROLLABLE AREA */
 .scroll-area {
   overflow-y: auto;
-  max-height: calc(100vh - 180px);
+  max-height: calc(100vh - 232px);
   width: 100%;
   display: flex;
   flex-direction: column;
@@ -618,11 +647,11 @@
 <!-- Phase badge -->
 <div class="phase-badge" id="phaseBadge" style="display:none"></div>
 
-<!-- Slide counter -->
-<div class="slide-counter" id="slideCounter"></div>
-
-<!-- Back button -->
-<button class="back-btn" id="backBtn" onclick="goBack()" style="display:none">← Retour</button>
+<!-- Bottom bar -->
+<div class="bottom-bar" id="bottomBar" style="display:none;">
+  <button class="back-btn" id="backBtn" onclick="goBack()" style="display:none;">← Retour</button>
+  <div class="slide-counter" id="slideCounter"></div>
+</div>
 
 <!-- Modal overlay -->
 <div class="modal-overlay" id="modalOverlay" onclick="closeModal(event)">
@@ -650,6 +679,13 @@
         <label for="inputDate">Date de la session</label>
         <input type="date" id="inputDate">
       </div>
+      <div class="id-field">
+        <label>Formateur de la session</label>
+        <div style="display:flex;gap:10px;margin-top:2px;">
+          <button type="button" class="formateur-btn" id="btnNathan" onclick="selectFormateur('Nathan')">Nathan</button>
+          <button type="button" class="formateur-btn" id="btnGauthier" onclick="selectFormateur('Gauthier')">Gauthier</button>
+        </div>
+      </div>
     </div>
     <div id="idError" style="color:var(--coral);font-size:13px;margin-bottom:0.5rem;display:none;">Merci de renseigner au moins le nom du groupe.</div>
     <button class="btn btn-teal" onclick="confirmIdentite()">Continuer →</button>
@@ -1103,10 +1139,8 @@
     </div>
     <div class="submit-zone">
       <div style="display:flex;gap:10px;justify-content:center;flex-wrap:wrap;">
-        <button class="btn btn-teal" onclick="envoyerReponses()" id="btnEnvoyer">📤 Envoyer mes réponses au formateur</button>
-        <button class="btn btn-outline btn-teal" onclick="exporterPDF()">⬇ Télécharger en PDF</button>
+        <button class="btn btn-teal" onclick="exporterPDF()">⬇ Télécharger en PDF</button>
       </div>
-      <div class="submit-status" id="submitStatus"></div>
     </div>
     <div style="display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:0.75rem;">
       <a href="https://biocid-anses.fr" target="_blank" class="btn btn-outline btn-teal" style="font-size:13px;padding:10px 20px;">biocid-anses.fr ↗</a>
@@ -1121,7 +1155,7 @@ let history = [];
 const totalSlides = 13;
 
 const selectedCase = { key: '', icon: '', title: '', desc: '' };
-const stagiaire = { nom: '', date: '' };
+const stagiaire = { nom: '', date: '', formateur: '' };
 
 const hints = {
   prevention: {
@@ -1233,6 +1267,9 @@ function updateUI() {
   const counter = document.getElementById('slideCounter');
   counter.textContent = currentSlide === 0 ? '' : currentSlide + ' / ' + totalSlides;
 
+  const bottomBar = document.getElementById('bottomBar');
+  if (bottomBar) bottomBar.style.display = currentSlide === 0 ? 'none' : 'flex';
+
   const backBtn = document.getElementById('backBtn');
   backBtn.style.display = history.length > 0 ? 'block' : 'none';
 
@@ -1316,6 +1353,13 @@ document.addEventListener('keydown', e => {
   if (e.key === 'Escape') closeModal();
 });
 
+/* ======================== FORMATEUR ======================== */
+function selectFormateur(nom) {
+  stagiaire.formateur = nom;
+  document.querySelectorAll('.formateur-btn').forEach(b => b.classList.remove('selected'));
+  document.getElementById('btn' + nom).classList.add('selected');
+}
+
 /* ======================== IDENTIFICATION ======================== */
 function confirmIdentite() {
   const nom = document.getElementById('inputNom').value.trim();
@@ -1366,6 +1410,7 @@ function collecterReponses() {
   return {
     nom: stagiaire.nom,
     date_session: stagiaire.date,
+    formateur: stagiaire.formateur || '',
     cas_choisi: selectedCase.title || '',
     cas_cle: selectedCase.key || '',
     reponses: reponses,
@@ -1455,6 +1500,7 @@ function exporterPDF() {
       <h1>TP Nuisibles — Certibiocide 2025</h1>
       <p class="meta"><strong>Groupe / Stagiaire :</strong> ${escapeHtml(data.nom)}</p>
       <p class="meta"><strong>Date de session :</strong> ${escapeHtml(data.date_session)}</p>
+      <p class="meta"><strong>Formateur :</strong> ${escapeHtml(data.formateur)}</p>
       <p class="meta"><strong>Cas pratique :</strong> ${escapeHtml(data.cas_choisi)}</p>
       <h2>Réponses TP1 &amp; TP2</h2>
       ${lignes}