diff --git a/modules/soporte/views/documentacion.php b/modules/soporte/views/documentacion.php
index 774b664..0da8f13 100644
--- a/modules/soporte/views/documentacion.php
+++ b/modules/soporte/views/documentacion.php
@@ -47,6 +47,10 @@ Layout::open('Soporte · Documentación', 'fas fa-life-ring');
     .doc-nav .buscador input { width:100%; font-size:.84rem; padding:7px 11px; border:1px solid #cbd5e1;
                                border-radius:8px; background:#fff; }
     .doc-nav .buscador input:focus { outline:none; border-color:#2563eb; box-shadow:0 0 0 3px rgba(37,99,235,.12); }
+    .doc-nav .btn-pdf { display:block; margin-top:8px; text-align:center; font-size:.78rem;
+                        padding:6px 10px; border:1px solid #cbd5e1; border-radius:8px;
+                        color:#475569; text-decoration:none; background:#fff; }
+    .doc-nav .btn-pdf:hover { border-color:#2563eb; color:#1d4ed8; }
     .doc-nav-sec { padding:10px 16px 4px; font-size:.68rem; font-weight:800; text-transform:uppercase;
                    letter-spacing:.08em; color:#64748b; display:flex; align-items:center; gap:6px; }
     .doc-nav a { display:block; padding:5px 16px 5px 30px; font-size:.83rem; color:#334155;
@@ -221,6 +225,9 @@ Layout::open('Soporte · Documentación', 'fas fa-life-ring');
     <nav class="doc-nav">
         <div class="buscador">
             <input type="search" id="q" placeholder="Buscar en la documentación…" autocomplete="off">
+            <a class="btn-pdf" href="<?= BASE_URL ?>erp.php?m=soporte&v=imprimir" target="_blank">
+                <i class="fas fa-file-pdf"></i> Exportar a PDF
+            </a>
         </div>
         <div id="resultados" style="display:none"></div>
         <div id="arbol">
diff --git a/modules/soporte/views/imprimir.php b/modules/soporte/views/imprimir.php
new file mode 100644
index 0000000..534ecc2
--- /dev/null
+++ b/modules/soporte/views/imprimir.php
@@ -0,0 +1,270 @@
+<?php
+/**
+ * modules/soporte/views/imprimir.php
+ * Documentación completa en un solo documento, maquetado para imprimir a PDF.
+ *
+ * ?s=<seccion>   limita la exportación a una sección
+ * (sin parámetro) exporta todo lo que el usuario puede ver
+ *
+ * Se sirve sin el layout del ERP: la idea es que la página sea el entregable.
+ */
+require_once APP_ROOT . '/config/config.php';
+if (!isUserLoggedIn()) { header('Location: ' . BASE_URL . 'login.php'); exit; }
+
+require_once __DIR__ . '/../Markdown.php';
+require_once __DIR__ . '/../DocIndex.php';
+require_once __DIR__ . '/../Generadores.php';
+
+$arbol = DocIndex::arbol();
+
+// Filtro opcional por sección
+$soloSeccion = preg_replace('/[^a-z0-9-]/', '', $_GET['s'] ?? '');
+if ($soloSeccion && isset($arbol[$soloSeccion])) {
+    $arbol = [$soloSeccion => $arbol[$soloSeccion]];
+}
+
+// Datos del laboratorio para la portada
+$emp = ['empresa_nombre' => 'Laboratorio Clínico', 'empresa_subtitulo' => '', 'doc_logo_base64' => ''];
+try {
+    $rows = Database::getInstance()->getConnection()->query(
+        "SELECT clave, valor FROM lab_config
+          WHERE clave IN ('empresa_nombre','empresa_subtitulo','doc_logo_base64')"
+    )->fetchAll(PDO::FETCH_KEY_PAIR);
+    $emp = array_merge($emp, $rows ?: []);
+} catch (\Throwable $_) {}
+
+// Numeración: 1. Sección → 1.1 Documento
+$capitulos = [];
+$nSec = 0;
+foreach ($arbol as $sec => $cfg) {
+    $nSec++;
+    $docs = [];
+    $nDoc = 0;
+    foreach ($cfg['docs'] as $d) {
+        $nDoc++;
+        [, $cuerpo] = DocIndex::leer($d['archivo']);
+        $md = Generadores::expandir($cuerpo);
+        // El H1 del documento se reemplaza por el encabezado numerado
+        $md = preg_replace('/^#\s+.*$/m', '', $md, 1);
+        $docs[] = [
+            'num'    => "{$nSec}.{$nDoc}",
+            'titulo' => $d['titulo'],
+            'id'     => 'doc-' . $sec . '-' . $d['slug'],
+            'html'   => Markdown::render($md),
+        ];
+    }
+    $capitulos[] = ['num' => (string)$nSec, 'titulo' => $cfg['titulo'],
+                    'resumen' => $cfg['resumen'], 'id' => 'cap-' . $sec, 'docs' => $docs];
+}
+
+$totalDocs = array_sum(array_map(fn($c) => count($c['docs']), $capitulos));
+$esc = fn($s) => htmlspecialchars((string)$s, ENT_QUOTES);
+?><!DOCTYPE html>
+<html lang="es">
+<head>
+<meta charset="UTF-8">
+<title>Documentación del Sistema — <?= $esc($emp['empresa_nombre']) ?></title>
+<style>
+    @page {
+        size: A4;
+        margin: 18mm 16mm 16mm 16mm;
+    }
+    @page :first { margin: 0; }
+
+    * { box-sizing: border-box; }
+    html { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
+    body {
+        font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+        font-size: 10.5pt; line-height: 1.55; color: #1e293b;
+        margin: 0; padding: 0; background: #fff;
+    }
+
+    /* ── Barra de acciones (no se imprime) ── */
+    .barra {
+        position: sticky; top: 0; z-index: 10;
+        background: #0f172a; color: #fff; padding: 11px 20px;
+        display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
+    }
+    .barra .t { font-weight: 700; flex: 1; font-size: .95rem; }
+    .barra button, .barra a {
+        background: #2563eb; color: #fff; border: none; border-radius: 7px;
+        padding: 7px 15px; font-size: .84rem; cursor: pointer; text-decoration: none;
+    }
+    .barra a.sec { background: rgba(255,255,255,.14); }
+    .barra button:hover { background: #1d4ed8; }
+    .hoja { max-width: 195mm; margin: 0 auto; padding: 14mm 12mm 20mm; }
+
+    /* ── Portada ── */
+    .portada {
+        display: flex; flex-direction: column; justify-content: center;
+        min-height: 247mm; padding: 0 22mm; text-align: center;
+        page-break-after: always; break-after: page;
+    }
+    .portada img { max-width: 170px; margin: 0 auto 26px; }
+    .portada .lab { font-size: 13pt; color: #64748b; letter-spacing: .06em;
+                    text-transform: uppercase; margin-bottom: 6px; }
+    .portada .sub { font-size: 10.5pt; color: #94a3b8; margin-bottom: 46px; }
+    .portada h1 { font-size: 30pt; font-weight: 800; color: #0d47a1;
+                  margin: 0 0 10px; line-height: 1.15; letter-spacing: -.5px; }
+    .portada .lin { width: 76px; height: 3px; background: #0d47a1;
+                    margin: 22px auto 24px; border-radius: 2px; }
+    .portada .desc { font-size: 11pt; color: #475569; max-width: 118mm;
+                     margin: 0 auto 50px; line-height: 1.65; }
+    .portada .meta { font-size: 9.5pt; color: #64748b; line-height: 1.9; }
+    .portada .meta b { color: #334155; }
+
+    /* ── Índice ── */
+    .indice { page-break-after: always; break-after: page; }
+    .indice h2 { font-size: 17pt; color: #0d47a1; margin: 0 0 22px;
+                 padding-bottom: 10px; border-bottom: 2px solid #e2e8f0; }
+    .idx-cap { margin-bottom: 16px; }
+    .idx-cap > a { display: block; font-size: 11.5pt; font-weight: 700; color: #0f172a;
+                   text-decoration: none; margin-bottom: 3px; }
+    .idx-cap .res { font-size: 9pt; color: #94a3b8; margin: 0 0 7px 20px; }
+    .idx-doc { display: block; font-size: 10pt; color: #334155; text-decoration: none;
+               margin: 0 0 3px 20px; }
+    .idx-doc .n { color: #94a3b8; display: inline-block; min-width: 30px; }
+
+    /* ── Capítulo ── */
+    .cap { page-break-before: always; break-before: page; padding-top: 26mm; text-align: center; }
+    .cap .n { font-size: 46pt; font-weight: 800; color: #dbeafe; line-height: 1; }
+    .cap h2 { font-size: 22pt; color: #0d47a1; margin: 6px 0 12px; font-weight: 800; }
+    .cap p { color: #64748b; font-size: 10.5pt; max-width: 115mm; margin: 0 auto; }
+
+    /* ── Documento ── */
+    .doc { page-break-before: always; break-before: page; }
+    .doc-h {
+        border-bottom: 2px solid #0d47a1; padding-bottom: 8px; margin-bottom: 16px;
+        page-break-after: avoid; break-after: avoid;
+    }
+    .doc-h .n { font-size: 9pt; color: #2563eb; font-weight: 700; letter-spacing: .08em; }
+    .doc-h h3 { font-size: 16pt; color: #0f172a; margin: 2px 0 0; font-weight: 700; }
+
+    h2, h3, h4 { page-break-after: avoid; break-after: avoid; }
+    .doc h2 { font-size: 12.5pt; color: #1565c0; margin: 17px 0 7px; font-weight: 700; }
+    .doc h3 { font-size: 11pt; color: #334155; margin: 13px 0 5px; font-weight: 700; }
+    .doc h4 { font-size: 10pt; color: #475569; margin: 11px 0 4px; font-weight: 700; }
+    .doc p  { margin: 0 0 8px; text-align: justify; }
+    .doc ul, .doc ol { margin: 0 0 9px; padding-left: 20px; }
+    .doc li { margin-bottom: 2px; }
+    .doc a { color: #1d4ed8; text-decoration: none; }
+    .doc strong { color: #0f172a; }
+
+    code { background: #f1f5f9; color: #be185d; padding: 1px 4px; border-radius: 3px;
+           font-family: "Consolas", "SF Mono", Menlo, monospace; font-size: .86em; }
+    pre { background: #f8fafc; border: 1px solid #cbd5e1; border-left: 3px solid #1565c0;
+          padding: 9px 12px; border-radius: 4px; margin: 0 0 10px; overflow-x: auto;
+          page-break-inside: avoid; break-inside: avoid; }
+    pre code { background: none; color: #0f172a; padding: 0; font-size: 8.2pt; line-height: 1.45; }
+
+    blockquote { border-left: 3px solid #f59e0b; background: #fffbeb; margin: 0 0 10px;
+                 padding: 8px 13px; page-break-inside: avoid; break-inside: avoid; }
+    blockquote p { margin: 0; color: #78350f; font-size: 9.8pt; text-align: left; }
+
+    .tabla-scroll { margin: 0 0 11px; page-break-inside: avoid; break-inside: avoid; }
+    table { width: 100%; border-collapse: collapse; font-size: 9pt; }
+    thead { display: table-header-group; }
+    th { background: #1565c0; color: #fff; text-align: left; font-weight: 600;
+         padding: 5px 8px; border: 1px solid #1565c0; }
+    td { padding: 4px 8px; border: 1px solid #e2e8f0; vertical-align: top; }
+    tbody tr:nth-child(even) { background: #f8fafc; }
+
+    hr { border: none; border-top: 1px solid #e2e8f0; margin: 16px 0; }
+
+    /* Tablas muy largas (inventarios generados) pueden partirse entre páginas */
+    .doc table { page-break-inside: auto; }
+    tr { page-break-inside: avoid; break-inside: avoid; }
+
+    @media print {
+        .barra { display: none !important; }
+        .hoja  { max-width: none; margin: 0; padding: 0; }
+        a { color: #1e293b !important; text-decoration: none; }
+        .portada { min-height: 250mm; }
+    }
+</style>
+</head>
+<body>
+
+<div class="barra">
+    <span class="t">
+        <?= $totalDocs ?> documento<?= $totalDocs === 1 ? '' : 's' ?>
+        <?= $soloSeccion ? '· ' . $esc($arbol[$soloSeccion]['titulo']) : '· documentación completa' ?>
+    </span>
+    <?php if ($soloSeccion): ?>
+        <a class="sec" href="<?= BASE_URL ?>erp.php?m=soporte&v=imprimir">Exportar todo</a>
+    <?php else: ?>
+        <?php foreach (DocIndex::seccionesVisibles() as $s => $c): ?>
+            <a class="sec" href="<?= BASE_URL ?>erp.php?m=soporte&v=imprimir&s=<?= urlencode($s) ?>">Solo <?= $esc($c['titulo']) ?></a>
+        <?php endforeach; ?>
+    <?php endif; ?>
+    <a class="sec" href="<?= BASE_URL ?>erp.php?m=soporte&v=documentacion">Volver</a>
+    <button onclick="window.print()">Imprimir / Guardar como PDF</button>
+</div>
+
+<div class="hoja">
+
+    <!-- ── Portada ── -->
+    <div class="portada">
+        <?php if (!empty($emp['doc_logo_base64'])): ?>
+            <img src="<?= $esc($emp['doc_logo_base64']) ?>" alt="">
+        <?php endif; ?>
+        <div class="lab"><?= $esc($emp['empresa_nombre']) ?></div>
+        <?php if (!empty($emp['empresa_subtitulo'])): ?>
+            <div class="sub"><?= $esc($emp['empresa_subtitulo']) ?></div>
+        <?php endif; ?>
+
+        <h1>Documentación<br>del Sistema</h1>
+        <div class="lin"></div>
+        <p class="desc">
+            <?php if ($soloSeccion): ?>
+                <?= $esc($arbol[$soloSeccion]['resumen']) ?>
+            <?php else: ?>
+                Manual de usuario, documentación técnica, arquitectura y guía de operación
+                del sistema de gestión del laboratorio.
+            <?php endif; ?>
+        </p>
+        <div class="meta">
+            <?php if ($soloSeccion): ?><b><?= $esc($arbol[$soloSeccion]['titulo']) ?></b><br><?php endif; ?>
+            <b><?= $totalDocs ?></b> documentos<br>
+            Generado el <b><?= date('d/m/Y') ?></b><br>
+            <span style="font-size:8.5pt">Los inventarios técnicos reflejan el estado del sistema a esta fecha</span>
+        </div>
+    </div>
+
+    <!-- ── Índice ── -->
+    <div class="indice">
+        <h2>Contenido</h2>
+        <?php foreach ($capitulos as $cap): ?>
+            <div class="idx-cap">
+                <a href="#<?= $esc($cap['id']) ?>"><?= $esc($cap['num']) ?>. <?= $esc($cap['titulo']) ?></a>
+                <p class="res"><?= $esc($cap['resumen']) ?></p>
+                <?php foreach ($cap['docs'] as $d): ?>
+                    <a class="idx-doc" href="#<?= $esc($d['id']) ?>">
+                        <span class="n"><?= $esc($d['num']) ?></span><?= $esc($d['titulo']) ?>
+                    </a>
+                <?php endforeach; ?>
+            </div>
+        <?php endforeach; ?>
+    </div>
+
+    <!-- ── Contenido ── -->
+    <?php foreach ($capitulos as $cap): ?>
+        <div class="cap" id="<?= $esc($cap['id']) ?>">
+            <div class="n"><?= $esc($cap['num']) ?></div>
+            <h2><?= $esc($cap['titulo']) ?></h2>
+            <p><?= $esc($cap['resumen']) ?></p>
+        </div>
+        <?php foreach ($cap['docs'] as $d): ?>
+            <div class="doc" id="<?= $esc($d['id']) ?>">
+                <div class="doc-h">
+                    <div class="n">CAPÍTULO <?= $esc($d['num']) ?></div>
+                    <h3><?= $esc($d['titulo']) ?></h3>
+                </div>
+                <?= $d['html'] ?>
+            </div>
+        <?php endforeach; ?>
+    <?php endforeach; ?>
+
+</div>
+</body>
+</html>