diff --git a/admin/index.php b/admin/index.php
index 23aa3a4..375f08b 100644
--- a/admin/index.php
+++ b/admin/index.php
@@ -21,10 +21,19 @@ $stories = Stories::getAll();
 </head>
 <body>
     <nav class="admin-nav">
-        <div class="nav-brand">Administration</div>
+        <div class="nav-brand">
+            <?php
+            $config = Config::load();
+            if (!empty($config['site']['logo'])): ?>
+                <img src="<?= htmlspecialchars('../' . $config['site']['logo']) ?>" 
+                    alt="<?= htmlspecialchars($config['site']['name']) ?>">
+            <?php endif; ?>
+            <span>Administration</span>
+        </div>
         <div class="nav-menu">
             <a href="profile.php" class="button">Profil</a>
             <a href="story-edit.php" class="button">Nouveau roman</a>
+            <a href="options.php" class="button">Options</a>
             <form method="POST" action="logout.php" class="logout-form">
                 <button type="submit">Déconnexion</button>
             </form>
diff --git a/admin/options.php b/admin/options.php
new file mode 100644
index 0000000..eef396b
--- /dev/null
+++ b/admin/options.php
@@ -0,0 +1,156 @@
+<?php
+require_once '../includes/config.php';
+require_once '../includes/auth.php';
+require_once '../includes/site-upload.php';
+
+// Vérification de l'authentification
+if (!Auth::check()) {
+    header('Location: login.php');
+    exit;
+}
+
+$success = '';
+$error = '';
+
+// Traitement du formulaire
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    try {
+        $config = Config::load();
+        
+        // Mise à jour des valeurs textuelles
+        $config['site']['name'] = trim($_POST['site_name'] ?? '');
+        $config['site']['description'] = trim($_POST['site_description'] ?? '');
+        
+        // Validation
+        if (empty($config['site']['name'])) {
+            throw new Exception('Le nom du site est requis');
+        }
+        
+        // Gestion de l'upload du logo
+        if (isset($_FILES['site_logo']) && $_FILES['site_logo']['error'] !== UPLOAD_ERR_NO_FILE) {
+            $uploadHandler = new SiteUploadHandler();
+            $config['site']['logo'] = $uploadHandler->handleLogoUpload($_FILES['site_logo']);
+        }
+        
+        // Sauvegarde
+        Config::save($config);
+        $success = 'Configuration mise à jour avec succès';
+        
+    } catch (Exception $e) {
+        $error = $e->getMessage();
+    }
+}
+
+// Chargement de la configuration actuelle
+$config = Config::load();
+?>
+<!DOCTYPE html>
+<html lang="fr">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Options du site - Administration</title>
+    <link rel="stylesheet" href="../assets/css/main.css">
+</head>
+<body>
+    <nav class="admin-nav">
+        <div class="nav-brand">
+            <?php
+            $config = Config::load();
+            if (!empty($config['site']['logo'])): ?>
+                <img src="<?= htmlspecialchars('../' . $config['site']['logo']) ?>" 
+                    alt="<?= htmlspecialchars($config['site']['name']) ?>">
+            <?php endif; ?>
+            <span>Administration</span>
+        </div>
+        <div class="nav-menu">
+            <a href="index.php" class="button">Retour</a>
+        </div>
+    </nav>
+
+    <main class="admin-main">
+        <h1>Options du site</h1>
+        
+        <?php if ($success): ?>
+            <div class="success-message"><?= htmlspecialchars($success) ?></div>
+        <?php endif; ?>
+        
+        <?php if ($error): ?>
+            <div class="error-message"><?= htmlspecialchars($error) ?></div>
+        <?php endif; ?>
+        
+        <form method="POST" class="options-form" enctype="multipart/form-data">
+            <div class="form-group">
+                <label for="site_name">Nom du site</label>
+                <input type="text" 
+                       id="site_name" 
+                       name="site_name" 
+                       value="<?= htmlspecialchars($config['site']['name']) ?>" 
+                       required>
+            </div>
+            
+            <div class="form-group">
+                <label for="site_description">Description du site</label>
+                <textarea id="site_description" 
+                          name="site_description" 
+                          rows="4"><?= htmlspecialchars($config['site']['description']) ?></textarea>
+            </div>
+
+            <div class="form-group">
+                <label for="site_logo">Logo du site</label>
+                <?php if (!empty($config['site']['logo'])): ?>
+                    <div class="current-logo">
+                        <img src="<?= htmlspecialchars('../' . $config['site']['logo']) ?>" 
+                             alt="Logo actuel" 
+                             style="max-height: 100px; margin: 10px 0;">
+                    </div>
+                <?php endif; ?>
+                <input type="file" 
+                       id="site_logo" 
+                       name="site_logo" 
+                       accept="image/jpeg,image/png,image/gif,image/svg+xml">
+                <small>Formats acceptés : JPG, PNG, GIF, SVG. Taille maximum : 2MB</small>
+            </div>
+            
+            <button type="submit" class="button">Enregistrer les modifications</button>
+        </form>
+    </main>
+
+    <script>
+    // Prévisualisation du logo
+    document.getElementById('site_logo').addEventListener('change', function(e) {
+        const file = e.target.files[0];
+        if (file) {
+            const reader = new FileReader();
+            reader.onload = function(e) {
+                let currentLogo = document.querySelector('.current-logo');
+                if (!currentLogo) {
+                    currentLogo = document.createElement('div');
+                    currentLogo.className = 'current-logo';
+                    e.target.parentElement.insertBefore(currentLogo, e.target.nextSibling);
+                }
+                currentLogo.innerHTML = `
+                    <img src="${e.target.result}" 
+                         alt="Aperçu du logo" 
+                         style="max-height: 100px; margin: 10px 0;">
+                `;
+            };
+            reader.readAsDataURL(file);
+        }
+    });
+
+    // Détection des changements non sauvegardés
+    document.addEventListener('DOMContentLoaded', function() {
+        const form = document.querySelector('form');
+        const initialState = new FormData(form).toString();
+        
+        window.addEventListener('beforeunload', (e) => {
+            if (new FormData(form).toString() !== initialState) {
+                e.preventDefault();
+                e.returnValue = '';
+            }
+        });
+    });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/admin/profile.php b/admin/profile.php
index f9d4f55..7ecd876 100644
--- a/admin/profile.php
+++ b/admin/profile.php
@@ -83,7 +83,15 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
 </head>
 <body>
     <nav class="admin-nav">
-        <div class="nav-brand">Administration</div>
+        <div class="nav-brand">
+            <?php
+            $config = Config::load();
+            if (!empty($config['site']['logo'])): ?>
+                <img src="<?= htmlspecialchars('../' . $config['site']['logo']) ?>" 
+                    alt="<?= htmlspecialchars($config['site']['name']) ?>">
+            <?php endif; ?>
+            <span>Administration</span>
+        </div>
         <div class="nav-menu">
             <a href="index.php" class="button">Retour</a>
         </div>
diff --git a/admin/story-edit.php b/admin/story-edit.php
index 886465d..cb33ebe 100644
--- a/admin/story-edit.php
+++ b/admin/story-edit.php
@@ -67,7 +67,15 @@ function generateSlug($title) {
 </head>
 <body>
     <nav class="admin-nav">
-        <div class="nav-brand">Administration</div>
+        <div class="nav-brand">
+            <?php
+            $config = Config::load();
+            if (!empty($config['site']['logo'])): ?>
+                <img src="<?= htmlspecialchars('../' . $config['site']['logo']) ?>" 
+                    alt="<?= htmlspecialchars($config['site']['name']) ?>">
+            <?php endif; ?>
+            <span>Administration</span>
+        </div>
         <div class="nav-menu">
             <a href="index.php" class="button">Retour</a>
         </div>
diff --git a/assets/css/layout.css b/assets/css/layout.css
index 76d2394..71cc534 100644
--- a/assets/css/layout.css
+++ b/assets/css/layout.css
@@ -12,6 +12,14 @@
 .nav-brand {
     font-size: 1.25rem;
     font-weight: bold;
+    display: flex;
+    align-items: center;
+    gap: var(--spacing-md);
+}
+
+.nav-brand img {
+    height: 40px;
+    width: auto;
 }
 
 .nav-menu {
diff --git a/assets/images/favicon.ico b/assets/images/favicon.ico
deleted file mode 100644
index 5a12331..0000000
Binary files a/assets/images/favicon.ico and /dev/null differ
diff --git a/includes/config.php b/includes/config.php
index 9d9aafa..aecc2e9 100644
--- a/includes/config.php
+++ b/includes/config.php
@@ -30,4 +30,28 @@ class Config {
         $config = self::load();
         return $config[$key] ?? $default;
     }
+
+    public static function save($newConfig) {
+        $configFile = __DIR__ . '/../config.json';
+        
+        // S'assurer que le fichier est accessible en écriture
+        if (!is_writable($configFile)) {
+            throw new Exception('Le fichier de configuration n\'est pas accessible en écriture');
+        }
+        
+        // Sauvegarder avec un formatage JSON lisible
+        $success = file_put_contents(
+            $configFile,
+            json_encode($newConfig, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE)
+        );
+        
+        if ($success === false) {
+            throw new Exception('Erreur lors de la sauvegarde de la configuration');
+        }
+        
+        // Mettre à jour la configuration en mémoire
+        self::$config = $newConfig;
+        
+        return true;
+    }
 }
\ No newline at end of file
diff --git a/includes/site-upload.php b/includes/site-upload.php
new file mode 100644
index 0000000..ea0624f
--- /dev/null
+++ b/includes/site-upload.php
@@ -0,0 +1,86 @@
+<?php
+class SiteUploadHandler {
+    private $uploadDir;
+    private $allowedTypes = ['image/jpeg', 'image/png', 'image/gif', 'image/svg+xml'];
+    private $maxFileSize = 2097152; // 2MB
+    
+    public function __construct() {
+        $this->uploadDir = __DIR__ . '/../assets/images/site/';
+        $this->ensureUploadDirectory();
+    }
+    
+    public function handleLogoUpload($file) {
+        try {
+            if ($file['error'] !== UPLOAD_ERR_OK) {
+                throw new Exception($this->getUploadErrorMessage($file['error']));
+            }
+            
+            // Vérifier le type MIME
+            $finfo = new finfo(FILEINFO_MIME_TYPE);
+            $mimeType = $finfo->file($file['tmp_name']);
+            if (!in_array($mimeType, $this->allowedTypes)) {
+                throw new Exception('Type de fichier non autorisé. Types acceptés : JPG, PNG, GIF, SVG');
+            }
+            
+            // Vérifier la taille
+            if ($file['size'] > $this->maxFileSize) {
+                throw new Exception('Fichier trop volumineux. Taille maximum : 2MB');
+            }
+            
+            // Générer le nom de fichier
+            $extension = $this->getExtensionFromMimeType($mimeType);
+            $filename = 'logo.' . $extension;
+            $targetPath = $this->uploadDir . $filename;
+            
+            // Supprimer l'ancien logo s'il existe
+            $this->removeOldLogo();
+            
+            // Déplacer le fichier
+            if (!move_uploaded_file($file['tmp_name'], $targetPath)) {
+                throw new Exception('Erreur lors du déplacement du fichier uploadé');
+            }
+            
+            return 'assets/images/site/' . $filename;
+            
+        } catch (Exception $e) {
+            throw $e;
+        }
+    }
+    
+    private function ensureUploadDirectory() {
+        if (!file_exists($this->uploadDir)) {
+            if (!mkdir($this->uploadDir, 0755, true)) {
+                throw new Exception('Impossible de créer le dossier d\'upload');
+            }
+        }
+    }
+    
+    private function removeOldLogo() {
+        foreach (glob($this->uploadDir . 'logo.*') as $file) {
+            unlink($file);
+        }
+    }
+    
+    private function getExtensionFromMimeType($mimeType) {
+        $map = [
+            'image/jpeg' => 'jpg',
+            'image/png' => 'png',
+            'image/gif' => 'gif',
+            'image/svg+xml' => 'svg'
+        ];
+        return $map[$mimeType] ?? 'png';
+    }
+    
+    private function getUploadErrorMessage($error) {
+        $errors = [
+            UPLOAD_ERR_INI_SIZE => 'Le fichier dépasse la taille maximale autorisée par PHP',
+            UPLOAD_ERR_FORM_SIZE => 'Le fichier dépasse la taille maximale autorisée par le formulaire',
+            UPLOAD_ERR_PARTIAL => 'Le fichier n\'a été que partiellement uploadé',
+            UPLOAD_ERR_NO_FILE => 'Aucun fichier n\'a été uploadé',
+            UPLOAD_ERR_NO_TMP_DIR => 'Dossier temporaire manquant',
+            UPLOAD_ERR_CANT_WRITE => 'Échec de l\'écriture du fichier sur le disque',
+            UPLOAD_ERR_EXTENSION => 'Une extension PHP a arrêté l\'upload'
+        ];
+        return $errors[$error] ?? 'Erreur inconnue lors de l\'upload';
+    }
+}
\ No newline at end of file
diff --git a/index.php b/index.php
index 569da5b..bea6db3 100644
--- a/index.php
+++ b/index.php
@@ -15,6 +15,10 @@ $stories = Stories::getAll();
 </head>
 <body>
     <header>
+        <?php if (!empty($config['site']['logo'])): ?>
+            <img src="<?= htmlspecialchars($config['site']['logo']) ?>" 
+                alt="<?= htmlspecialchars($config['site']['name']) ?>">
+        <?php endif; ?>
         <h1><?= htmlspecialchars($config['site']['name']) ?></h1>
         <p><?= htmlspecialchars($config['site']['description']) ?></p>
     </header>
