diff --git a/public/userarea/production_line_view2.php b/public/userarea/production_line_view2.php
index dc4da228..320bbdfc 100644
--- a/public/userarea/production_line_view2.php
+++ b/public/userarea/production_line_view2.php
@@ -410,6 +410,39 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST' && !empty($_POST['create_quick'])) {
 }
 
 
+// --- AJAX: mescole collegate a una matrice ---
+if (!empty($_GET['mescole_by_matrice'])) {
+    header('Content-Type: application/json; charset=utf-8');
+    $idMatrice = (int)($_GET['id_matrice'] ?? 0);
+
+    if ($idMatrice <= 0) {
+        echo json_encode(['success' => false, 'rows' => []]);
+        exit;
+    }
+
+    $stmt = $pdo->prepare("
+        SELECT me.id, me.nome
+        FROM matrici_mescole mm
+        JOIN mescole me ON me.id = mm.idmescola
+        WHERE mm.idmatrice = :idm AND me.is_active = 1
+        ORDER BY me.nome
+    ");
+    $stmt->execute(['idm' => $idMatrice]);
+    $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
+
+    // Linee associate a questa matrice
+    $stmtL = $pdo->prepare("
+        SELECT ml.idlinea AS id
+        FROM matrici_lines ml
+        WHERE ml.idmatrice = :idm
+    ");
+    $stmtL->execute(['idm' => $idMatrice]);
+    $lineIds = array_map('intval', $stmtL->fetchAll(PDO::FETCH_COLUMN));
+
+    echo json_encode(['success' => true, 'rows' => $rows, 'lines' => $lineIds]);
+    exit;
+}
+
 // --- AJAX PRINCIPALE: carica i record della data selezionata ---
 if (!empty($_GET['ajax'])) {
     $lineRaw = $_GET['line'] ?? '';
@@ -2455,11 +2488,88 @@ if (!empty($_GET['ajax'])) {
                     width: '100%',
                     closeOnSelect: false
                 });
+                $('#qcLinea').select2({
+                    dropdownParent: $('#quickCreateModal .modal-content'),
+                    placeholder: 'Seleziona linea...',
+                    allowClear: true,
+                    width: '100%'
+                });
+
+                // Salvo l'HTML originale delle linee per poterlo ricostruire ad ogni cambio matrice
+                if (!window._qcLineaOriginalHtml) {
+                    window._qcLineaOriginalHtml = $('#qcLinea').html();
+                }
+
+                // Ricostruisce il select linea raggruppando le associate in cima
+                function rebuildLineSelect(associatedIds) {
+                    const current = $('#qcLinea').val();
+                    const assocSet = new Set((associatedIds || []).map(String));
+
+                    // Ripristino tutte le option originali
+                    const $tmp = $('<select>').html(window._qcLineaOriginalHtml);
+                    const allOptions = [];
+                    $tmp.find('option').each(function() {
+                        const v = $(this).val();
+                        if (v === '') return; // scarto il placeholder
+                        allOptions.push({
+                            value: v,
+                            label: $(this).text()
+                        });
+                    });
+
+                    let html = '<option value="">Seleziona linea</option>';
+
+                    const assoc = allOptions.filter(o => assocSet.has(String(o.value)));
+                    const others = allOptions.filter(o => !assocSet.has(String(o.value)));
+
+                    if (assoc.length) {
+                        html += '<optgroup label="⭐ Consigliate per questa matrice">';
+                        assoc.forEach(o => html += `<option value="${o.value}">⭐ ${o.label}</option>`);
+                        html += '</optgroup>';
+                    }
+                    if (others.length) {
+                        html += '<optgroup label="Altre linee">';
+                        others.forEach(o => html += `<option value="${o.value}">${o.label}</option>`);
+                        html += '</optgroup>';
+                    }
+
+                    $('#qcLinea').html(html);
+
+                    // Preseleziono se è associata UNA sola linea, altrimenti mantengo la scelta corrente
+                    if (assoc.length === 1) {
+                        $('#qcLinea').val(String(assoc[0].value));
+                    } else {
+                        $('#qcLinea').val(current || '');
+                    }
+                    $('#qcLinea').trigger('change.select2');
+                }
+
+                // Quando cambio matrice, precarico mescole e riordino le linee
+                $('#qcMatrice').off('change.autoMescole').on('change.autoMescole', function() {
+                    const idMatrice = $(this).val();
+                    if (!idMatrice) {
+                        $('#qcMescola').val(null).trigger('change');
+                        rebuildLineSelect([]);
+                        return;
+                    }
+
+                    $.getJSON('', {
+                        mescole_by_matrice: 1,
+                        id_matrice: idMatrice
+                    }, function(r) {
+                        if (r.success && Array.isArray(r.rows)) {
+                            const ids = r.rows.map(m => String(m.id));
+                            $('#qcMescola').val(ids).trigger('change');
+                        }
+                        rebuildLineSelect(r.lines || []);
+                    });
+                });
             }
 
             function destroyQuickSelects() {
                 if ($('#qcMatrice').data('select2')) $('#qcMatrice').select2('destroy');
                 if ($('#qcMescola').data('select2')) $('#qcMescola').select2('destroy');
+                if ($('#qcLinea').data('select2')) $('#qcLinea').select2('destroy');
             }
 
             function closeQuickModal() {