diff --git a/Admin/CustomCSSManager/Infrastructure/Bootstrap/CustomCSSManagerBootstrap.php b/Admin/CustomCSSManager/Infrastructure/Bootstrap/CustomCSSManagerBootstrap.php
new file mode 100644
index 00000000..4554cb71
--- /dev/null
+++ b/Admin/CustomCSSManager/Infrastructure/Bootstrap/CustomCSSManagerBootstrap.php
@@ -0,0 +1,107 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ROITheme\Admin\CustomCSSManager\Infrastructure\Bootstrap;
+
+use ROITheme\Admin\CustomCSSManager\Infrastructure\Persistence\WordPressSnippetRepository;
+use ROITheme\Admin\CustomCSSManager\Application\UseCases\SaveSnippetUseCase;
+use ROITheme\Admin\CustomCSSManager\Application\UseCases\DeleteSnippetUseCase;
+use ROITheme\Admin\CustomCSSManager\Application\DTOs\SaveSnippetRequest;
+use ROITheme\Admin\CustomCSSManager\Domain\ValueObjects\SnippetId;
+use ROITheme\Shared\Domain\Exceptions\ValidationException;
+
+/**
+ * Bootstrap para CustomCSSManager
+ *
+ * Registra el handler de formulario POST en admin_init
+ * ANTES de que se envíen headers HTTP
+ */
+final class CustomCSSManagerBootstrap
+{
+    private const NONCE_ACTION = 'roi_custom_css_manager';
+
+    public static function init(): void
+    {
+        add_action('admin_init', [self::class, 'handleFormSubmission']);
+    }
+
+    public static function handleFormSubmission(): void
+    {
+        if (!isset($_POST['roi_css_action'])) {
+            return;
+        }
+
+        // Verificar que estamos en la página correcta
+        $page = $_GET['page'] ?? '';
+        $component = $_GET['component'] ?? '';
+        if ($page !== 'roi-theme-admin' || $component !== 'custom-css-manager') {
+            return;
+        }
+
+        // Verificar nonce
+        if (!wp_verify_nonce($_POST['_wpnonce'] ?? '', self::NONCE_ACTION)) {
+            wp_die('Nonce verification failed');
+        }
+
+        // Verificar permisos
+        if (!current_user_can('manage_options')) {
+            wp_die('Insufficient permissions');
+        }
+
+        global $wpdb;
+        $repository = new WordPressSnippetRepository($wpdb);
+        $saveUseCase = new SaveSnippetUseCase($repository);
+        $deleteUseCase = new DeleteSnippetUseCase($repository);
+
+        $action = sanitize_text_field($_POST['roi_css_action']);
+
+        try {
+            match ($action) {
+                'save' => self::processSave($_POST, $saveUseCase),
+                'delete' => self::processDelete($_POST, $deleteUseCase),
+                default => null,
+            };
+
+            // Redirect con mensaje de éxito
+            $redirect_url = admin_url('admin.php?page=roi-theme-admin&component=custom-css-manager&roi_message=success');
+            wp_redirect($redirect_url);
+            exit;
+
+        } catch (ValidationException $e) {
+            $redirect_url = admin_url('admin.php?page=roi-theme-admin&component=custom-css-manager&roi_message=error&roi_error=' . urlencode($e->getMessage()));
+            wp_redirect($redirect_url);
+            exit;
+        }
+    }
+
+    private static function processSave(array $data, SaveSnippetUseCase $useCase): void
+    {
+        $id = sanitize_text_field($data['snippet_id'] ?? '');
+        if (empty($id)) {
+            $id = SnippetId::generate()->value();
+        }
+
+        $request = SaveSnippetRequest::fromArray([
+            'id' => $id,
+            'name' => sanitize_text_field($data['snippet_name'] ?? ''),
+            'description' => sanitize_textarea_field($data['snippet_description'] ?? ''),
+            'css' => wp_strip_all_tags($data['snippet_css'] ?? ''),
+            'type' => sanitize_text_field($data['snippet_type'] ?? 'deferred'),
+            'pages' => array_map('sanitize_text_field', $data['snippet_pages'] ?? ['all']),
+            'enabled' => isset($data['snippet_enabled']),
+            'order' => absint($data['snippet_order'] ?? 100),
+        ]);
+
+        $useCase->execute($request);
+    }
+
+    private static function processDelete(array $data, DeleteSnippetUseCase $useCase): void
+    {
+        $id = sanitize_text_field($data['snippet_id'] ?? '');
+        if (empty($id)) {
+            throw new ValidationException('ID de snippet requerido para eliminar');
+        }
+        $useCase->execute($id);
+    }
+}
diff --git a/Admin/CustomCSSManager/Infrastructure/Ui/CustomCSSManagerFormBuilder.php b/Admin/CustomCSSManager/Infrastructure/Ui/CustomCSSManagerFormBuilder.php
index 93e49e62..77234a02 100644
--- a/Admin/CustomCSSManager/Infrastructure/Ui/CustomCSSManagerFormBuilder.php
+++ b/Admin/CustomCSSManager/Infrastructure/Ui/CustomCSSManagerFormBuilder.php
@@ -5,12 +5,7 @@ namespace ROITheme\Admin\CustomCSSManager\Infrastructure\Ui;
 
 use ROITheme\Admin\Infrastructure\Ui\AdminDashboardRenderer;
 use ROITheme\Admin\CustomCSSManager\Infrastructure\Persistence\WordPressSnippetRepository;
-use ROITheme\Admin\CustomCSSManager\Application\UseCases\SaveSnippetUseCase;
-use ROITheme\Admin\CustomCSSManager\Application\UseCases\DeleteSnippetUseCase;
 use ROITheme\Admin\CustomCSSManager\Application\UseCases\GetAllSnippetsUseCase;
-use ROITheme\Admin\CustomCSSManager\Application\DTOs\SaveSnippetRequest;
-use ROITheme\Admin\CustomCSSManager\Domain\ValueObjects\SnippetId;
-use ROITheme\Shared\Domain\Exceptions\ValidationException;
 
 /**
  * FormBuilder para gestión de CSS snippets en Admin Panel
@@ -19,6 +14,9 @@ use ROITheme\Shared\Domain\Exceptions\ValidationException;
  * - Constructor recibe AdminDashboardRenderer
  * - Método buildForm() genera el HTML del formulario
  *
+ * NOTA: El handler de formulario POST está en CustomCSSManagerBootstrap
+ * para que se ejecute en admin_init ANTES de que se envíen headers HTTP.
+ *
  * Design System: Gradiente navy #0E2337 → #1e3a5f, accent #FF8600
  */
 final class CustomCSSManagerFormBuilder
@@ -28,120 +26,15 @@ final class CustomCSSManagerFormBuilder
 
     private WordPressSnippetRepository $repository;
     private GetAllSnippetsUseCase $getAllUseCase;
-    private SaveSnippetUseCase $saveUseCase;
-    private DeleteSnippetUseCase $deleteUseCase;
 
     public function __construct(
         private readonly AdminDashboardRenderer $renderer
     ) {
-        // Crear repositorio y Use Cases internamente
+        // Crear repositorio y Use Case para listar snippets
         global $wpdb;
         $this->repository = new WordPressSnippetRepository($wpdb);
         $this->getAllUseCase = new GetAllSnippetsUseCase($this->repository);
-        $this->saveUseCase = new SaveSnippetUseCase($this->repository);
-        $this->deleteUseCase = new DeleteSnippetUseCase($this->repository);
-
-        // Registrar handler de formulario POST
-        $this->registerFormHandler();
-    }
-
-    /**
-     * Registra handler para procesar formularios POST
-     */
-    private function registerFormHandler(): void
-    {
-        // Solo registrar una vez
-        static $registered = false;
-        if ($registered) {
-            return;
-        }
-        $registered = true;
-
-        add_action('admin_init', function() {
-            $this->handleFormSubmission();
-        });
-    }
-
-    /**
-     * Procesa envío de formulario
-     */
-    public function handleFormSubmission(): void
-    {
-        if (!isset($_POST['roi_css_action'])) {
-            return;
-        }
-
-        // Verificar nonce
-        if (!wp_verify_nonce($_POST['_wpnonce'] ?? '', self::NONCE_ACTION)) {
-            wp_die('Nonce verification failed');
-        }
-
-        // Verificar permisos
-        if (!current_user_can('manage_options')) {
-            wp_die('Insufficient permissions');
-        }
-
-        $action = sanitize_text_field($_POST['roi_css_action']);
-
-        try {
-            match ($action) {
-                'save' => $this->processSave($_POST),
-                'delete' => $this->processDelete($_POST),
-                default => null,
-            };
-
-            // Redirect con mensaje de éxito
-            wp_redirect(add_query_arg('roi_message', 'success', wp_get_referer()));
-            exit;
-
-        } catch (ValidationException $e) {
-            // Redirect con mensaje de error
-            wp_redirect(add_query_arg([
-                'roi_message' => 'error',
-                'roi_error' => urlencode($e->getMessage())
-            ], wp_get_referer()));
-            exit;
-        }
-    }
-
-    /**
-     * Procesa guardado de snippet
-     */
-    private function processSave(array $data): void
-    {
-        $id = sanitize_text_field($data['snippet_id'] ?? '');
-
-        // Generar ID si es nuevo
-        if (empty($id)) {
-            $id = SnippetId::generate()->value();
-        }
-
-        $request = SaveSnippetRequest::fromArray([
-            'id' => $id,
-            'name' => sanitize_text_field($data['snippet_name'] ?? ''),
-            'description' => sanitize_textarea_field($data['snippet_description'] ?? ''),
-            'css' => wp_strip_all_tags($data['snippet_css'] ?? ''),
-            'type' => sanitize_text_field($data['snippet_type'] ?? 'deferred'),
-            'pages' => array_map('sanitize_text_field', $data['snippet_pages'] ?? ['all']),
-            'enabled' => isset($data['snippet_enabled']),
-            'order' => absint($data['snippet_order'] ?? 100),
-        ]);
-
-        $this->saveUseCase->execute($request);
-    }
-
-    /**
-     * Procesa eliminación de snippet
-     */
-    private function processDelete(array $data): void
-    {
-        $id = sanitize_text_field($data['snippet_id'] ?? '');
-
-        if (empty($id)) {
-            throw new ValidationException('ID de snippet requerido para eliminar');
-        }
-
-        $this->deleteUseCase->execute($id);
+        // NOTA: El handler POST está en CustomCSSManagerBootstrap (admin_init)
     }
 
     /**
@@ -160,13 +53,9 @@ final class CustomCSSManagerFormBuilder
         // Header
         $html .= $this->buildHeader($componentId, count($snippets));
 
-        // Mensajes flash
+        // Toast para mensajes (usa el sistema existente de admin-dashboard.js)
         if ($message) {
-            $html .= sprintf(
-                '<div class="alert alert-%s m-3">%s</div>',
-                esc_attr($message['type']),
-                esc_html($message['text'])
-            );
+            $html .= $this->buildToastTrigger($message);
         }
 
         // Lista de snippets existentes
@@ -367,7 +256,7 @@ final class CustomCSSManagerFormBuilder
         // Botones
         $html .= '        <div class="col-12">';
         $html .= '          <button type="submit" class="btn text-white" style="background-color: #FF8600;">';
-        $html .= '            <i class="bi bi-save me-1"></i> Guardar Snippet';
+        $html .= '            <i class="bi bi-check-circle me-1"></i> Guardar Cambios';
         $html .= '          </button>';
         $html .= '          <button type="button" class="btn btn-secondary" onclick="resetCssForm()">';
         $html .= '            <i class="bi bi-x-circle me-1"></i> Cancelar';
@@ -449,14 +338,84 @@ final class CustomCSSManagerFormBuilder
         $message = $_GET['roi_message'] ?? null;
 
         if ($message === 'success') {
-            return ['type' => 'success', 'text' => 'Snippet guardado correctamente'];
+            return ['type' => 'success', 'text' => 'Cambios guardados correctamente'];
         }
 
         if ($message === 'error') {
             $error = urldecode($_GET['roi_error'] ?? 'Error desconocido');
-            return ['type' => 'danger', 'text' => $error];
+            return ['type' => 'error', 'text' => $error];
         }
 
         return null;
     }
+
+    /**
+     * Genera script para mostrar Toast
+     */
+    private function buildToastTrigger(array $message): string
+    {
+        $type = esc_js($message['type']);
+        $text = esc_js($message['text']);
+
+        // Mapear tipo a configuración de Bootstrap
+        $typeMap = [
+            'success' => ['bg' => 'success', 'icon' => 'bi-check-circle-fill'],
+            'error' => ['bg' => 'danger', 'icon' => 'bi-x-circle-fill'],
+        ];
+        $config = $typeMap[$type] ?? $typeMap['success'];
+        $bg = $config['bg'];
+        $icon = $config['icon'];
+
+        return <<<HTML
+        <script>
+        document.addEventListener('DOMContentLoaded', function() {
+            // Crear container de toasts si no existe
+            let toastContainer = document.getElementById('roiToastContainer');
+            if (!toastContainer) {
+                toastContainer = document.createElement('div');
+                toastContainer.id = 'roiToastContainer';
+                toastContainer.className = 'toast-container position-fixed start-50 translate-middle-x';
+                toastContainer.style.top = '60px';
+                toastContainer.style.zIndex = '999999';
+                document.body.appendChild(toastContainer);
+            }
+
+            // Crear toast
+            const toastId = 'toast-' + Date.now();
+            const toastHTML = `
+                <div id="\${toastId}" class="toast align-items-center text-white bg-{$bg} border-0" role="alert" aria-live="assertive" aria-atomic="true">
+                    <div class="d-flex">
+                        <div class="toast-body">
+                            <i class="bi {$icon} me-2"></i>
+                            <strong>{$text}</strong>
+                        </div>
+                        <button type="button" class="btn-close btn-close-white me-2 m-auto" data-bs-dismiss="toast" aria-label="Close"></button>
+                    </div>
+                </div>
+            `;
+
+            toastContainer.insertAdjacentHTML('beforeend', toastHTML);
+
+            // Mostrar toast
+            const toastElement = document.getElementById(toastId);
+            const toast = new bootstrap.Toast(toastElement, {
+                autohide: true,
+                delay: 5000
+            });
+            toast.show();
+
+            // Eliminar del DOM después de ocultarse
+            toastElement.addEventListener('hidden.bs.toast', function() {
+                toastElement.remove();
+            });
+
+            // Limpiar parámetros de URL sin recargar
+            const url = new URL(window.location.href);
+            url.searchParams.delete('roi_message');
+            url.searchParams.delete('roi_error');
+            window.history.replaceState({}, '', url.toString());
+        });
+        </script>
+        HTML;
+    }
 }
diff --git a/Admin/Infrastructure/Ui/Views/partials/component-view.php b/Admin/Infrastructure/Ui/Views/partials/component-view.php
index e6fb0493..92683531 100644
--- a/Admin/Infrastructure/Ui/Views/partials/component-view.php
+++ b/Admin/Infrastructure/Ui/Views/partials/component-view.php
@@ -60,6 +60,12 @@ $group = $groupId && isset($groups[$groupId]) ? $groups[$groupId] : null;
         </div>
     </div>
 
+    <?php
+    // Componentes con sistema de guardado propio (CRUD de entidades)
+    $componentsWithOwnSaveSystem = ['custom-css-manager'];
+
+    if (!in_array($activeComponent, $componentsWithOwnSaveSystem, true)):
+    ?>
     <!-- Botones Globales Save/Cancel -->
     <div class="d-flex justify-content-end gap-2 p-3 rounded border mt-4" style="background-color: #f8f9fa; border-color: #e9ecef !important;">
         <button type="button" class="btn btn-outline-secondary" id="cancelChanges">
@@ -71,4 +77,5 @@ $group = $groupId && isset($groups[$groupId]) ? $groups[$groupId] : null;
             <?php echo esc_html__('Guardar Cambios', 'roi-theme'); ?>
         </button>
     </div>
+    <?php endif; ?>
 </div>
diff --git a/functions.php b/functions.php
index ab25190e..97040a0b 100644
--- a/functions.php
+++ b/functions.php
@@ -329,6 +329,21 @@ if (!is_admin()) {
     }
 }
 
+// =============================================================================
+// 5.2.1. CUSTOM CSS MANAGER BOOTSTRAP (Handler de formulario POST)
+// =============================================================================
+
+/**
+ * Inicializar Bootstrap de CustomCSSManager para admin
+ *
+ * IMPORTANTE: Este Bootstrap registra el handler de formulario POST en admin_init,
+ * ANTES de que WordPress envíe headers HTTP. Esto permite que wp_redirect()
+ * funcione correctamente después de guardar/eliminar snippets.
+ */
+if (is_admin()) {
+    \ROITheme\Admin\CustomCSSManager\Infrastructure\Bootstrap\CustomCSSManagerBootstrap::init();
+}
+
 // =============================================================================
 // 5.3. INFORMACIÓN DE DEBUG (Solo en desarrollo)
 // =============================================================================