diff --git a/index.php b/index.php
index fe3c6d9..5b91226 100644
--- a/index.php
+++ b/index.php
@@ -2,20 +2,23 @@
 declare(strict_types=1);
 
 // -------------------- CONSTANTES --------------------
-const CACHE_DIR       = '/var/cache/homepage';
-const INSTANCES_JSON  = CACHE_DIR . '/instances.json';
-const URLS_TXT        = CACHE_DIR . '/urls.txt';
-const INSTANCES_URL   = 'https://searx.space/data/instances.json';
-const CACHE_MAX_AGE   = 3600; // 1 heure
-const BANG_FILE       = __DIR__ . '/bang.json';
+const CACHE_DIR = '/var/cache/homepage';
+const INSTANCES_JSON = CACHE_DIR . '/instances.json';
+const URLS_TXT = __DIR__ . '/urls.txt'; // ← Hors du cache, à la racine
+const INSTANCES_URL = 'https://searx.space/data/instances.json';
+const CACHE_MAX_AGE = 3600; // 1 heure
+const BANG_FILE = __DIR__ . '/bang.json';
+const USE_SEARX_INSTANCES = true; // false → utilise engines.txt
 
 // -------------------- HEADERS DE SÉCURITÉ --------------------
 header('X-Frame-Options: SAMEORIGIN');
 header('X-Content-Type-Options: nosniff');
 header('Referrer-Policy: no-referrer-when-downgrade');
 header("Content-Security-Policy: default-src 'none'; frame-ancestors 'none'; sandbox");
+header('X-Search-Mode: ' . (USE_SEARX_INSTANCES ? 'searx' : 'engines')); // ← Point 6
 
 // -------------------- CLASSES --------------------
+
 class CacheManager
 {
     private array $urlsCache = [];
@@ -109,22 +112,58 @@ class BangManager
     }
 }
 
-class RequestHandler
+class EngineManager
+{
+    private static ?array $cachedEngines = null;
+    private array $engines = [];
+
+    public function __construct(private string $file = __DIR__ . '/engines.txt')
+    {
+        if (self::$cachedEngines === null) {
+            $this->loadEngines();
+            self::$cachedEngines = $this->engines;
+        } else {
+            $this->engines = self::$cachedEngines;
+        }
+    }
+
+    private function loadEngines(): void
+    {
+        if (!file_exists($this->file)) {
+            throw new RuntimeException("Fichier engines.txt introuvable");
+        }
+        $lines = file($this->file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+        $this->engines = array_filter($lines, fn($line) => !empty(trim($line)));
+    }
+
+    public function getRandomEngine(): string
+    {
+        if (empty($this->engines)) {
+            throw new RuntimeException("Aucun moteur de recherche configuré dans engines.txt");
+        }
+        return $this->engines[array_rand($this->engines)];
+    }
+}
+
+class SearxHandler
 {
     public function __construct(private CacheManager $cache, private BangManager $bang) {}
 
-    public function handle(): void {
+    public function handle(): void
+    {
         $method = $_SERVER['REQUEST_METHOD'] ?? 'GET';
         $query = $_REQUEST['q'] ?? null;
 
         if ($query !== null && !$this->bang->tryRedirect($query)) {
             $instance = rtrim($this->cache->getRandomUrl(), '/');
+            $url = $instance . '/search?' . http_build_query(['q' => $query]);
 
             if ($method === 'GET') {
-                $this->redirectGet($instance, $query);
+                header("Location: $url");
+                exit;
             } elseif ($method === 'POST') {
-               $this->redirectGet($instance, $query);
-               // $this->proxyPost($instance, $_POST);
+                header("Location: $url"); // Redirige en GET pour simplifier
+                exit;
             } else {
                 http_response_code(405);
                 exit('Méthode non autorisée');
@@ -135,57 +174,80 @@ class RequestHandler
                 header("Location: $instance");
                 exit;
             } elseif ($method === 'POST') {
-                $this->proxyPost($instance, $_POST);
+                header("Location: $instance");
+                exit;
             } else {
                 http_response_code(405);
                 exit('Méthode non autorisée');
             }
         }
     }
+}
 
-    private function redirectGet(string $instance, string $query): void {
-        $url = $instance . '/search?' . http_build_query(['q' => $query]);
-        header("Location: $url");
-        exit;
-    }
+class EngineHandler
+{
+    public function __construct(private EngineManager $engineManager, private BangManager $bang) {}
 
-    private function proxyPost(string $urlBase, array $postData): void {
-        $url = $urlBase . '/search';
-        $ch = curl_init($url);
-        curl_setopt_array($ch, [
-            CURLOPT_RETURNTRANSFER => true,
-            CURLOPT_POST           => true,
-            CURLOPT_POSTFIELDS     => http_build_query($postData),
-            CURLOPT_HEADER         => false,
-            CURLOPT_FOLLOWLOCATION => true,
-            CURLOPT_TIMEOUT        => 10,
-            CURLOPT_SSL_VERIFYPEER => true,
-        ]);
-        $response = curl_exec($ch);
-        $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
-        curl_close($ch);
+    public function handle(): void
+    {
+        $method = $_SERVER['REQUEST_METHOD'] ?? 'GET';
+        $query = $_REQUEST['q'] ?? null;
 
-        http_response_code($code);
-        echo $response;
-        exit;
+        if ($query !== null && !$this->bang->tryRedirect($query)) {
+            $engineTemplate = $this->engineManager->getRandomEngine();
+            $url = sprintf($engineTemplate, rawurlencode($query));
+
+            if ($method === 'GET') {
+                header("Location: $url");
+                exit;
+            } elseif ($method === 'POST') {
+                header("Location: $url"); // Redirige en GET
+                exit;
+            } else {
+                http_response_code(405);
+                exit('Méthode non autorisée');
+            }
+        } elseif ($query === null) {
+            // Rediriger vers la page d'accueil du premier moteur
+            $engineTemplate = $this->engineManager->getRandomEngine();
+            $homepage = str_replace('?query=%s', '', str_replace('?q=%s', '', $engineTemplate));
+            if ($method === 'GET') {
+                header("Location: $homepage");
+                exit;
+            } elseif ($method === 'POST') {
+                header("Location: $homepage");
+                exit;
+            } else {
+                http_response_code(405);
+                exit('Méthode non autorisée');
+            }
+        }
     }
 }
 
 // -------------------- EXECUTION --------------------
 try {
-    $cache = new CacheManager();
-    if ($cache->isExpired()) {
-        if (!$cache->downloadInstances() || !$cache->extractValidUrls()) {
-            http_response_code(500);
-            exit('Erreur interne : impossible de générer le cache.');
+    $bang = new BangManager();
+    $engineManager = new EngineManager();
+
+    if (USE_SEARX_INSTANCES) {
+        $cache = new CacheManager();
+        if ($cache->isExpired()) {
+            if (!$cache->downloadInstances() || !$cache->extractValidUrls()) {
+                http_response_code(500);
+                exit('Erreur interne : veuillez réessayer plus tard.');
+            }
         }
+        $handler = new SearxHandler($cache, $bang);
+    } else {
+        $handler = new EngineHandler($engineManager, $bang);
     }
 
-    $bang = new BangManager();
-    $handler = new RequestHandler($cache, $bang);
     $handler->handle();
 
 } catch (\Throwable $e) {
+    // Ne pas exposer les détails techniques → Point 3
+    error_log('Erreur interne : ' . $e->getMessage() . ' | Trace: ' . $e->getTraceAsString());
     http_response_code(500);
-    exit('Erreur interne : ' . $e->getMessage());
-}
+    exit('Erreur interne : veuillez réessayer plus tard.');
+}
\ No newline at end of file