diff --git a/assets/css/styles.css b/assets/css/styles.css
index 4cff53b..46be704 100644
--- a/assets/css/styles.css
+++ b/assets/css/styles.css
@@ -89,8 +89,6 @@ body {
 
 /* ── Cabecera ─────────────────────────────────────────── */
 .sidebar-header {
-    padding: 20px 20px 16px;
-    text-align: center;
     border-bottom: 1px solid rgba(255, 255, 255, 0.12);
     background: rgba(0, 0, 0, 0.15);
     backdrop-filter: blur(4px);
@@ -99,17 +97,6 @@ body {
     flex-shrink: 0;
 }
 
-.sidebar-header h4 {
-    font-size: 1rem;
-    font-weight: 700;
-    letter-spacing: 0.02em;
-    margin: 0;
-    color: #fff;
-    white-space: nowrap;
-    overflow: hidden;
-    text-overflow: ellipsis;
-}
-
 /* ── Lista de menú ────────────────────────────────────── */
 .sidebar-menu {
     list-style: none;
diff --git a/shared/components/sidebar.php b/shared/components/sidebar.php
index 10e3f26..0f629e4 100644
--- a/shared/components/sidebar.php
+++ b/shared/components/sidebar.php
@@ -26,23 +26,33 @@ if (!class_exists('ModuleRegistry', false)) {
     }
 }
 
-// ── Brand color desde DB (si no fue inyectado ya por Layout.php) ─────────────
+// ── Brand color + logo desde DB ──────────────────────────────────────────────
 if (!defined('_SIDEBAR_BRAND_INJECTED')) {
     define('_SIDEBAR_BRAND_INJECTED', true);
     $_sb_brand      = '#1565c0';
     $_sb_brand_dark = '#0d47a1';
+    $_sb_logo       = '';
+    $_sb_lab_nombre = '';
     try {
         if (class_exists('Database', false)) {
-            $_sb_row = Database::getInstance()->fetch("SELECT valor FROM lab_config WHERE clave = 'doc_color'");
-            if ($_sb_row && preg_match('/^#[0-9a-fA-F]{3,8}$/', $_sb_row['valor'])) {
-                $_sb_brand = $_sb_row['valor'];
-                $_sb_hex   = ltrim($_sb_brand, '#');
-                $_sb_brand_dark = sprintf('#%02x%02x%02x',
-                    max(0, hexdec(substr($_sb_hex, 0, 2)) - 40),
-                    max(0, hexdec(substr($_sb_hex, 2, 2)) - 40),
-                    max(0, hexdec(substr($_sb_hex, 4, 2)) - 40)
-                );
+            $__cfgs = Database::getInstance()->fetchAll(
+                "SELECT clave, valor FROM lab_config WHERE clave IN ('doc_color','doc_logo_base64','empresa_nombre')"
+            );
+            foreach ($__cfgs as $__r) {
+                if ($__r['clave'] === 'doc_color' && preg_match('/^#[0-9a-fA-F]{3,8}$/', $__r['valor'])) {
+                    $_sb_brand = $__r['valor'];
+                } elseif ($__r['clave'] === 'doc_logo_base64' && !empty($__r['valor'])) {
+                    $_sb_logo = $__r['valor'];
+                } elseif ($__r['clave'] === 'empresa_nombre') {
+                    $_sb_lab_nombre = $__r['valor'];
+                }
             }
+            $_sb_hex = ltrim($_sb_brand, '#');
+            $_sb_brand_dark = sprintf('#%02x%02x%02x',
+                max(0, hexdec(substr($_sb_hex, 0, 2)) - 40),
+                max(0, hexdec(substr($_sb_hex, 2, 2)) - 40),
+                max(0, hexdec(substr($_sb_hex, 4, 2)) - 40)
+            );
         }
     } catch (\Throwable $_) {}
     echo "<style>:root{--brand:{$_sb_brand};--brand-dark:{$_sb_brand_dark}}</style>\n";
@@ -75,9 +85,7 @@ $_isActive = function (string $route) use ($_current_script): string {
     return $routeBase === $_current_script ? ' active' : '';
 };
 
-// Título del sidebar: prioridad al nombre definido por el módulo, luego el genérico
-$_sidebar_title = $SIDEBAR_TITLE ?? $GLOBALS['_LAYOUT_TITLE'] ?? 'Panel ERP';
-$_sidebar_icon  = $SIDEBAR_ICON  ?? $GLOBALS['_LAYOUT_ICON']  ?? 'fas fa-th-large';
+$_sb_display_name = $_sb_lab_nombre ?: 'Panel ERP';
 
 // Nombre del usuario para el pie del sidebar
 $_user_name = $_SESSION['admin_user']['full_name']
@@ -103,10 +111,15 @@ $_base = defined('APP_URL') ? rtrim(APP_URL, '/') : '';
 <nav class="sidebar" id="erp-sidebar">
 
     <div class="sidebar-header">
-        <h4 style="flex:1;min-width:0">
-            <i class="<?= htmlspecialchars($_sidebar_icon, ENT_QUOTES, 'UTF-8') ?>"></i>
-            <?= htmlspecialchars($_sidebar_title, ENT_QUOTES, 'UTF-8') ?>
-        </h4>
+        <?php if ($_sb_logo): ?>
+            <img src="<?= htmlspecialchars($_sb_logo, ENT_QUOTES, 'UTF-8') ?>"
+                 alt="Logo" class="sb-logo-img">
+        <?php else: ?>
+            <div class="sb-logo-fallback">
+                <i class="fas fa-flask"></i>
+            </div>
+        <?php endif; ?>
+        <div class="sb-brand-name"><?= htmlspecialchars($_sb_display_name, ENT_QUOTES, 'UTF-8') ?></div>
         <a href="<?= $_base ?>/lab_configuracion.php" class="sb-config-btn" title="Configuración">
             <i class="fas fa-gear"></i>
         </a>
@@ -223,15 +236,50 @@ if (class_exists('ModuleRegistry', false)) {
 </nav>
 
 <style>
-/* ── Botón config en header ─────────────────────────── */
-.sidebar-header { display:flex; align-items:center; gap:10px; }
+/* ── Header con logo ────────────────────────────────── */
+.sidebar-header {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: 6px;
+    padding: 18px 16px 14px;
+    position: relative;
+}
+.sb-logo-img {
+    max-width: 120px;
+    max-height: 60px;
+    object-fit: contain;
+    filter: brightness(0) invert(1);
+    opacity: .92;
+}
+.sb-logo-fallback {
+    width: 52px; height: 52px;
+    border-radius: 14px;
+    background: rgba(255,255,255,.18);
+    display: flex; align-items: center; justify-content: center;
+    font-size: 1.5rem; color: #fff;
+}
+.sb-brand-name {
+    font-size: .72rem;
+    font-weight: 700;
+    letter-spacing: .04em;
+    color: rgba(255,255,255,.80);
+    text-align: center;
+    line-height: 1.3;
+    max-width: 100%;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+/* config en esquina superior derecha */
 .sb-config-btn {
-    color: rgba(255,255,255,.65);
-    font-size: 1rem;
-    padding: 4px 6px;
+    position: absolute;
+    top: 10px; right: 10px;
+    color: rgba(255,255,255,.55);
+    font-size: .9rem;
+    padding: 5px 7px;
     border-radius: 6px;
     transition: color .15s, background .15s;
-    flex-shrink: 0;
     line-height: 1;
 }
 .sb-config-btn:hover { color:#fff; background:rgba(255,255,255,.15); }
@@ -387,23 +435,32 @@ if (class_exists('ModuleRegistry', false)) {
         });
     };
 
-    // Inicializar al cargar
+    // Inicializar al cargar — sin animación para evitar flash
     document.addEventListener('DOMContentLoaded', function () {
         var collapsed = getCollapsed();
+        // Deshabilitar transición durante init
+        var style = document.createElement('style');
+        style.id  = '_sb_notrans';
+        style.textContent = '.sb-group { transition: none !important; }';
+        document.head.appendChild(style);
+
         document.querySelectorAll('.sb-group').forEach(function(group) {
-            var catId    = group.id;
-            var section  = document.querySelector('[data-cat="' + catId + '"]');
+            var catId   = group.id;
+            var section = document.querySelector('[data-cat="' + catId + '"]');
             if (!section) return;
-
-            var hasActive  = !!group.querySelector('.nav-link.active');
+            var hasActive   = !!group.querySelector('.nav-link.active');
             var isCollapsed = !hasActive && collapsed.indexOf(catId) !== -1;
-
-            // Medir altura real antes de colapsar
+            // Altura real (funciona incluso con overflow:hidden)
             group.style.maxHeight = group.scrollHeight + 'px';
             group.style.opacity   = '1';
-
             applyState(group, section, isCollapsed, false);
         });
+
+        // Reactivar transición en el próximo frame
+        requestAnimationFrame(function() {
+            var el = document.getElementById('_sb_notrans');
+            if (el) el.remove();
+        });
     });
 })();
 </script>