diff --git a/app.py b/app.py
index 44bc956..3152332 100644
--- a/app.py
+++ b/app.py
@@ -189,6 +189,27 @@ def scan():
 def serve_cache(filename):
     return send_from_directory(CACHE_DIR, filename)
 
+@app.route('/bulk_price_update', methods=['POST'])
+@login_required
+def bulk_price_update():
+    data = request.get_json()
+    barcodes = data.get('barcodes', [])
+    new_price = data.get('new_price')
+
+    if not barcodes or new_price is None:
+        return jsonify({"error": "Missing data"}), 400
+
+    try:
+        with sqlite3.connect(DB_FILE) as conn:
+            # Use executemany for efficiency
+            params = [(float(new_price), b) for b in barcodes]
+            conn.executemany('UPDATE products SET price = ? WHERE barcode = ?', params)
+            conn.commit()
+        return jsonify({"status": "success"}), 200
+    except Exception as e:
+        print(f"Bulk update failed: {e}")
+        return jsonify({"error": str(e)}), 500
+
 if __name__ == '__main__':
     init_db()
     socketio.run(app, host='0.0.0.0', port=5000, debug=True)
diff --git a/static/styleIndex.css b/static/styleIndex.css
index 94031bd..a758576 100644
--- a/static/styleIndex.css
+++ b/static/styleIndex.css
@@ -157,26 +157,80 @@ th {
     font-weight: bold;
 }
 
-#new-product-prompt {
-    display: none;
+/* --- BULK ACTIONS PERMANENT BAR --- */
+.bulk-actions {
+    display: flex;
     background: var(--accent);
     color: white;
-    padding: 12px 20px;
+    padding: 10px 20px;
     border-radius: 8px;
-    margin-bottom: 20px;
-    animation: slideDown 0.4s ease;
+    margin-bottom: 15px;
     justify-content: space-between;
     align-items: center;
+    min-height: 60px;
+    box-sizing: border-box;
+    width: 100%;
+}
+
+.bulk-controls {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    flex-shrink: 0;
+}
+
+/* Override the global 100% width for this specific input */
+.bulk-actions input#bulk-price-input {
+    width: 130px !important;
+    margin: 0 !important;
+    padding: 8px !important;
+    height: 36px !important;
+    background: rgba(0,0,0,0.2) !important;
+    border: 1px solid rgba(255,255,255,0.3) !important;
+    color: white !important;
+}
+
+.bulk-actions button {
+    height: 36px;
+    white-space: nowrap;
+    padding: 0 15px;
+    margin: 0;
+}
+
+/* --- RESPONSIVE DESIGN (MOBILE) --- */
+@media (max-width: 900px) {
+    .main-container {
+        flex-direction: column;
+    }
+    
+    .column {
+        min-width: 100%;
+    }
+
+    .bulk-actions {
+        flex-direction: column;
+        height: auto;
+        padding: 15px;
+        gap: 10px;
+        text-align: center;
+    }
+
+    .bulk-controls {
+        width: 100%;
+        justify-content: center;
+    }
+
+    .bulk-actions input#bulk-price-input {
+        width: 100% !important; /* On mobile, let it be wide */
+    }
+
+    /* Hide barcode on very small screens to save space */
+    td:nth-child(2), th:nth-child(2) {
+        display: none;
+    }
 }
 
 @keyframes slideDown {
-    from {
-        transform: translateY(-20px);
-        opacity: 0;
-    }
-
-    to {
-        transform: translateY(0);
-        opacity: 1;
-    }
-}
\ No newline at end of file
+    from { transform: translateY(-20px); opacity: 0; }
+    to { transform: translateY(0); opacity: 1; }
+}
diff --git a/templates/index.html b/templates/index.html
index e30d11a..4676b91 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -56,35 +56,48 @@
         <div class="column">
             <div class="card">
                 <h3 style="text-align: left; margin-top:0;">Inventario</h3>
-                <input type="text" id="searchInput" onkeyup="searchTable()" placeholder="Buscar por nombre o código...">
-
-                <table id="inventoryTable">
-                    <thead>
-                        <tr>
-                            <th>Código</th>
-                            <th>Nombre</th>
-                            <th>Precio</th>
-                            <th>Acciones</th>
-                        </tr>
-                    </thead>
-                    <tbody>
-                        {% for p in products %}
-                        <tr>
-                            <td style="font-family: monospace;">{{ p[0] }}</td>
-                            <td>{{ p[1] }}</td>
-                            <td class="price-cell" data-value="{{ p[2] }}"></td>
-                            <td style="white-space: nowrap;">
-                                <button class="btn-edit"
-                                    onclick="editProduct('{{ p[0] }}', '{{ p[1] }}', '{{ p[2] }}', '{{ p[3] }}')">Editar</button>
-                                <form action="/delete/{{ p[0] }}" method="POST" style="display:inline;">
-                                    <button type="submit" class="btn-del"
-                                        onclick="return confirm('¿Eliminar producto?')">Borrar</button>
-                                </form>
-                            </td>
-                        </tr>
-                        {% endfor %}
-                    </tbody>
-                </table>
+                
+                <!-- Bulk Action Bar -->
+                <div id="bulk-bar" class="bulk-actions">
+                    <span><b id="selected-count">0</b> seleccionados</span>
+                    <div class="bulk-controls">
+                        <input type="number" id="bulk-price-input" placeholder="Precio CLP">
+                        <button onclick="applyBulkPrice()" style="background: white; color: var(--accent);">OK</button>
+                        <button onclick="clearSelection()" class="btn-del">✕</button>
+                    </div>
+                </div>
+                <input type="text" id="searchInput" onkeyup="searchTable()" placeholder="Buscar...">
+                <div style="overflow-x: auto; width: 100%;">
+                    <table id="inventoryTable">
+                        <thead>
+                            <tr>
+                                <th><input type="checkbox" id="select-all" onclick="toggleAll(this)"></th>
+                                <th>Código</th>
+                                <th>Nombre</th>
+                                <th>Precio</th>
+                                <th>Acciones</th>
+                            </tr>
+                        </thead>
+                        <tbody>
+                            {% for p in products %}
+                            <tr>
+                                <td><input type="checkbox" class="product-checkbox" data-barcode="{{ p[0] }}" onclick="updateBulkBar()"></td>
+                                <td style="font-family: monospace;">{{ p[0] }}</td>
+                                <td>{{ p[1] }}</td>
+                                <td class="price-cell" data-value="{{ p[2] }}"></td>
+                                <td style="white-space: nowrap;">
+                                    <button class="btn-edit"
+                                        onclick="editProduct('{{ p[0] }}', '{{ p[1] }}', '{{ p[2] }}', '{{ p[3] }}')">Editar</button>
+                                    <form action="/delete/{{ p[0] }}" method="POST" style="display:inline;">
+                                        <button type="submit" class="btn-del"
+                                            onclick="return confirm('¿Eliminar producto?')">Borrar</button>
+                                    </form>
+                                </td>
+                            </tr>
+                            {% endfor %}
+                        </tbody>
+                    </table>
+                </div>
             </div>
         </div>
     </div>
@@ -194,6 +207,51 @@
                 tr[i].style.display = content.toUpperCase().indexOf(filter) > -1 ? "" : "none";
             }
         }
+
+        function toggleAll(source) {
+            const checkboxes = document.querySelectorAll('.product-checkbox');
+            checkboxes.forEach(cb => cb.checked = source.checked);
+            updateBulkBar();
+        }
+
+        function updateBulkBar() {
+            const checked = document.querySelectorAll('.product-checkbox:checked');
+            document.getElementById('selected-count').innerText = checked.length;
+            
+            const okBtn = document.querySelector('.bulk-controls button[onclick="applyBulkPrice()"]');
+            if (okBtn) {
+                okBtn.disabled = checked.length === 0;
+                okBtn.style.opacity = checked.length === 0 ? "0.5" : "1";
+            }
+        }
+
+        function clearSelection() {
+            document.querySelectorAll('.product-checkbox').forEach(cb => cb.checked = false);
+            document.getElementById('select-all').checked = false;
+            updateBulkBar();
+        }
+
+        async function applyBulkPrice() {
+            const price = document.getElementById('bulk-price-input').value;
+            if (!price || price < 0) return alert("Ingresa un precio válido");
+
+            const barcodes = Array.from(document.querySelectorAll('.product-checkbox:checked'))
+                                .map(cb => cb.getAttribute('data-barcode'));
+
+            if (!confirm(`¿Actualizar el precio de ${barcodes.length} productos a ${clpFormatter.format(price)}?`)) return;
+
+            const response = await fetch('/bulk_price_update', {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify({ barcodes: barcodes, new_price: price })
+            });
+
+            if (response.ok) {
+                window.location.reload();
+            } else {
+                alert("Error al actualizar productos.");
+            }
+        }
     </script>
 </body>