diff --git a/README.md b/README.md
index fa2c2a2..1255026 100644
--- a/README.md
+++ b/README.md
@@ -13,11 +13,11 @@ Die App ist so aufgebaut, dass UI und Datenzugriff getrennt sind. Je nach Reimpo
 
 - Einstiegspunkt (z. B. `public/index.php`): Lädt eine Seite/Ansicht, die das Layout und die Matrix enthält.
 - Matrix-Ansicht (z. B. `partials/landing/main/material-matrix.php`): Enthält das Markup + JS, das die Daten lädt und die Tabelle rendert.
-- API-Endpoints (z. B. `public/api/*`): Stellen JSON bereit für
+- API-Endpoints (z. B. `/api/*` über das Routing): Stellen JSON bereit für
   - Drucker-Liste
   - Material-Liste
   - Drucker-spezifische Material-Kompatibilität
-- DB-Zugriff (z. B. `tools/db.php`): Baut eine DB-Verbindung und wird von den API-Endpunkten genutzt.
+- DB-Zugriff (z. B. `src/App/Database.php`): Baut eine DB-Verbindung und wird von den API-Endpunkten genutzt.
 
 Aktuelle DB-Struktur (Schema-Orientierung)
 Das Schema besteht aus drei Kern-Tabellen, die für die Materialmatrix benötigt werden:
@@ -47,6 +47,7 @@ Hinweise für Reimport/Neuaufbau
   - `printer`: Drucker-Datensatz
   - `materials`: Liste der Materialien mit optionalem `support_level` + Zusatzinfos.
 - Die Datenbank kann migriert werden, solange Material-, Drucker- und Zuordnungsdaten semantisch erhalten bleiben.
+- Für DB-Zugriff muss `APP_DB_ENABLED` aktiviert sein; die Zugangsdaten sollten per ENV-Variablen kommen.
 
 Sicherheit
 - Zugangsdaten sollten nicht im Repo liegen. Nutze ENV-Variablen oder separate Configs pro Environment.
diff --git a/api/.gitkeep b/api/.gitkeep
index 8b13789..e69de29 100644
--- a/api/.gitkeep
+++ b/api/.gitkeep
@@ -1 +0,0 @@
-
diff --git a/config/.gitkeep b/config/.gitkeep
deleted file mode 100644
index 8b13789..0000000
--- a/config/.gitkeep
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/config/community.php b/config/community.php
deleted file mode 100644
index e5553d8..0000000
--- a/config/community.php
+++ /dev/null
@@ -1 +0,0 @@
-<?php // TODO
diff --git a/config/config.php b/config/config.php
index c115f82..e9c56c5 100644
--- a/config/config.php
+++ b/config/config.php
@@ -1,6 +1,67 @@
 <?php
-$env = getenv('APP_ENV') ?: 'staging';
-$env = strtolower($env);
-$path = __DIR__ . 'db.php';
+declare(strict_types=1);
 
-return require $path;
+// Basic error reporting (keep strict in dev)
+ini_set('display_errors', '1');
+ini_set('display_startup_errors', '1');
+error_reporting(E_ALL);
+
+// Determine APP_ENV consistently:
+// 1) Prefer environment variable.
+// 2) If not set, try root config files to define APP_ENV.
+$appEnvFromEnv = getenv('APP_ENV');
+if (!$appEnvFromEnv) {
+    $rootDomain = __DIR__ . '/domaindata.php';
+    $rootSettings = __DIR__ . '/settings.php';
+    if (file_exists($rootDomain)) {
+        require_once $rootDomain;
+    }
+    if (file_exists($rootSettings)) {
+        require_once $rootSettings;
+    }
+}
+
+$appEnv = $appEnvFromEnv ?: (defined('APP_ENV') ? (string) APP_ENV : 'prod');
+$envDir = rtrim(__DIR__, '/\\') . '/' . $appEnv;
+
+foreach (['domaindata.php','settings.php'] as $cfgFile) {
+    $rootPath = __DIR__ . '/' . $cfgFile;
+    $envPath  = $envDir . '/' . $cfgFile;
+
+    if (file_exists($rootPath)) {
+        require_once $rootPath;
+    } elseif (file_exists($envPath)) {
+        require_once $envPath;
+    } else {
+        throw new \RuntimeException("Missing required config file: $cfgFile (looked for $rootPath or $envPath)");
+    }
+}
+
+
+// Environment: staging|prod|local (example)
+if (!defined('APP_ENV')) {
+    define('APP_ENV', 'local');
+}
+
+// Asset versioning
+if (!defined('ASSET_VERSION')) {
+    define('ASSET_VERSION', 'dev-' . date('Ymd-His'));
+}
+
+// Primary domain + URL
+if (!defined('APP_DOMAIN_PRIMARY')) {
+    define('APP_DOMAIN_PRIMARY', APP_DOMAIN_NAME);
+}
+if (!defined('APP_URL_PRIMARY')) {
+    define('APP_URL_PRIMARY', 'https://' . APP_DOMAIN_PRIMARY);
+}
+
+// API base (example)
+if (!defined('APP_API_BASE')) {
+    define('APP_API_BASE', 'https://api.' . APP_DOMAIN_PRIMARY);
+}
+
+// Feature toggles
+if (!defined('APP_DB_ENABLED')) {
+    define('APP_DB_ENABLED', false); // set true to enable DB connection
+}
diff --git a/config/fileload.php b/config/fileload.php
index e5553d8..1d94f93 100644
--- a/config/fileload.php
+++ b/config/fileload.php
@@ -1 +1,41 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+// 1) Load config (constants, env, domains)
+require_once __DIR__ . '/config.php';
+
+// 2) Composer Autoloader (falls vorhanden)
+$composerAutoload = __DIR__ . '/../vendor/autoload.php';
+if (file_exists($composerAutoload)) {
+    require_once $composerAutoload;
+} else {
+    // 2b) Fallback: minimaler Autoloader
+    spl_autoload_register(function (string $class): void {
+        $prefix = 'App\\';
+        if (!str_starts_with($class, $prefix)) {
+            return;
+        }
+
+        $rel  = substr($class, strlen($prefix));
+        $path = __DIR__ . '/../src/App/' . str_replace('\\', '/', $rel) . '.php';
+
+        if (file_exists($path)) {
+            require_once $path;
+        }
+    });
+}
+
+// 3) Global helper functions (tpl(), t(), asset_*())
+require_once __DIR__ . '/../src/helpers.php';
+
+// 4) Initialize App (services)
+$config = \App\Config::fromPhpConstants(__DIR__ . '/../config');
+\App\App::init($config);
+
+// 5) Start session + create client-id cookie
+$app = \App\App::get();
+$app->session()->start();
+$clientId = $app->session()->ensureClientId();
+
+// Optionally expose a single global for templates if desired
+$GLOBALS['client_id'] = $clientId;
diff --git a/config/prod/.gitkeep b/config/prod/.gitkeep
deleted file mode 100644
index 8b13789..0000000
--- a/config/prod/.gitkeep
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/config/prod/db.php b/config/prod/db.php
index e5553d8..ff6afa6 100644
--- a/config/prod/db.php
+++ b/config/prod/db.php
@@ -1 +1,94 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+/**
+ * config/db.php
+ *
+ * - Choose ONE driver below (others stay commented).
+ * - Each driver has its own config section.
+ * - The file returns ONE normalized array used by Database::createPdo().
+ */
+
+// ------------------------------------------------------------
+// 1) Driver selection (choose one)
+// ------------------------------------------------------------
+//$driver = 'pgsql';
+$driver = 'mysql';
+// $driver = 'sqlite';
+
+// ------------------------------------------------------------
+// 2) Driver-specific configuration sections
+// ------------------------------------------------------------
+
+// ---- PostgreSQL (PDO driver: pgsql) -------------------------
+$pgsql = [
+    'driver'   => 'pgsql',
+    'host'     => 'localhost',
+    'port'     => 5432,
+    'dbname'   => 'mydb',
+
+    // optional: schema/search_path (commonly "public")
+    'schema'   => 'public',
+
+    'user'     => 'myuser',
+    'password' => 'secret',
+
+    'options'  => [
+        PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
+        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+    ],
+];
+
+// ---- MySQL / MariaDB (PDO driver: mysql) -------------------
+$mysql = [
+    'driver'   => 'mysql',
+    'host'     => 'localhost',
+    'port'     => 3306,
+    'dbname'   => 'd0453540',
+    'charset'  => 'utf8mb4',
+
+    // Alternative to host/port:
+    // 'unix_socket' => '/var/run/mysqld/mysqld.sock',
+
+    'user'     => 'd0453540',
+    'password' => 'P6jGRrSaX8QSiBMEJBL7',
+
+    'options'  => [
+        PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
+        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+        PDO::ATTR_EMULATE_PREPARES   => false,
+    ],
+];
+
+// ---- SQLite (PDO driver: sqlite) ---------------------------
+$sqlite = [
+    'driver'   => 'sqlite',
+
+    // Use an absolute path in production, e.g. /var/app/data/app.sqlite
+    // For demo/dev you can use a relative path.
+    'path'     => __DIR__ . '/../var/app.sqlite',
+
+    // SQLite ignores host/port/user/pass
+    'options'  => [
+        PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
+        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+    ],
+];
+
+// ------------------------------------------------------------
+// 3) Select and return config
+// ------------------------------------------------------------
+switch ($driver) {
+    case 'pgsql':
+        return $pgsql;
+
+    case 'mysql':
+        return $mysql;
+
+    case 'sqlite':
+        return $sqlite;
+
+    default:
+        throw new RuntimeException('Unsupported DB driver in config/db.php: ' . $driver);
+}
+
diff --git a/config/prod/domaindata.php b/config/prod/domaindata.php
index e5553d8..9230205 100644
--- a/config/prod/domaindata.php
+++ b/config/prod/domaindata.php
@@ -1 +1,12 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+// Example: a single "brand" domain name.
+// In real deployments you might derive this from ENV or hostnames.
+if (!defined('APP_DOMAIN_NAME')) {
+    define('APP_DOMAIN_NAME', 'shape3d.it');
+}
+
+if (!defined('APP_PREFIX')) {
+    define('APP_PREFIX', 'miniapp');
+}
diff --git a/config/prod/emailtemplates.php b/config/prod/emailtemplates.php
deleted file mode 100644
index e5553d8..0000000
--- a/config/prod/emailtemplates.php
+++ /dev/null
@@ -1 +0,0 @@
-<?php // TODO
diff --git a/config/prod/settings.php b/config/prod/settings.php
index e5553d8..7efe550 100644
--- a/config/prod/settings.php
+++ b/config/prod/settings.php
@@ -1 +1,8 @@
-<?php // TODO
+<?php
+    define('APP_ENV', 'prod');
+    define('ASSET_VERSION', 'dev-' . date('Ymd-His'));
+    define('APP_DOMAIN_PRIMARY', APP_DOMAIN_NAME);
+    define('APP_URL_PRIMARY', 'https://' . APP_DOMAIN_PRIMARY);
+    define('APP_API_BASE', 'https://api.' . APP_DOMAIN_PRIMARY);
+    define('APP_DB_ENABLED', true); // set true to enable DB connection
+
diff --git a/config/staging/db.php b/config/staging/db.php
index e9a0320..d50ad39 100644
--- a/config/staging/db.php
+++ b/config/staging/db.php
@@ -1,8 +1,93 @@
 <?php
-return [
-    'db_host' => 'localhost',
-    'db_name' => 'd0453540',
-    'db_user' => 'd0453540',
-    'db_pass' => 'P6jGRrSaX8QSiBMEJBL7',
-    'db_charset' => 'utf8mb4',
+declare(strict_types=1);
+
+/**
+ * config/db.php
+ *
+ * - Choose ONE driver below (others stay commented).
+ * - Each driver has its own config section.
+ * - The file returns ONE normalized array used by Database::createPdo().
+ */
+
+// ------------------------------------------------------------
+// 1) Driver selection (choose one)
+// ------------------------------------------------------------
+//$driver = 'pqsql';
+$driver = 'mysql';
+// $driver = 'sqlite';
+
+// ------------------------------------------------------------
+// 2) Driver-specific configuration sections
+// ------------------------------------------------------------
+
+// ---- PostgreSQL (PDO driver: pgsql) -------------------------
+$pgsql = [
+    'driver'   => 'pgsql',
+    'host'     => 'localhost',
+    'port'     => 5432,
+    'dbname'   => 'mydb',
+
+    // optional: schema/search_path (commonly "public")
+    'schema'   => 'public',
+
+    'user'     => 'myuser',
+    'password' => 'secret',
+
+    'options'  => [
+        PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
+        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+    ],
 ];
+
+// ---- MySQL / MariaDB (PDO driver: mysql) -------------------
+$mysql = [
+    'driver'   => 'mysql',
+    'host'     => 'localhost',
+    'port'     => 3306,
+    'dbname'   => 'd0453540',
+    'charset'  => 'utf8mb4',
+
+    // Alternative to host/port:
+    // 'unix_socket' => '/var/run/mysqld/mysqld.sock',
+
+    'user'     => 'd0453540',
+    'password' => 'P6jGRrSaX8QSiBMEJBL7',
+
+    'options'  => [
+        PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
+        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+        PDO::ATTR_EMULATE_PREPARES   => false,
+    ],
+];
+
+// ---- SQLite (PDO driver: sqlite) ---------------------------
+$sqlite = [
+    'driver'   => 'sqlite',
+
+    // Use an absolute path in production, e.g. /var/app/data/app.sqlite
+    // For demo/dev you can use a relative path.
+    'path'     => __DIR__ . '/../var/app.sqlite',
+
+    // SQLite ignores host/port/user/pass
+    'options'  => [
+        PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
+        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+    ],
+];
+
+// ------------------------------------------------------------
+// 3) Select and return config
+// ------------------------------------------------------------
+switch ($driver) {
+    case 'pgsql':
+        return $pgsql;
+
+    case 'mysql':
+        return $mysql;
+
+    case 'sqlite':
+        return $sqlite;
+
+    default:
+        throw new RuntimeException('Unsupported DB driver in config/db.php: ' . $driver);
+}
diff --git a/config/staging/domaindata.php b/config/staging/domaindata.php
index e5553d8..0c0eadd 100644
--- a/config/staging/domaindata.php
+++ b/config/staging/domaindata.php
@@ -1 +1,12 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+// Example: a single "brand" domain name.
+// In real deployments you might derive this from ENV or hostnames.
+if (!defined('APP_DOMAIN_NAME')) {
+    define('APP_DOMAIN_NAME', 'staging.shape3d.it');
+}
+
+if (!defined('APP_PREFIX')) {
+    define('APP_PREFIX', 'miniapp');
+}
diff --git a/config/staging/emailtemplates.php b/config/staging/emailtemplates.php
deleted file mode 100644
index e5553d8..0000000
--- a/config/staging/emailtemplates.php
+++ /dev/null
@@ -1 +0,0 @@
-<?php // TODO
diff --git a/config/staging/settings.php b/config/staging/settings.php
index e5553d8..9108687 100644
--- a/config/staging/settings.php
+++ b/config/staging/settings.php
@@ -1 +1,8 @@
-<?php // TODO
+<?php
+    define('APP_ENV', 'staging');
+    define('ASSET_VERSION', 'dev-' . date('Ymd-His'));
+    define('APP_DOMAIN_PRIMARY', APP_DOMAIN_NAME);
+    define('APP_URL_PRIMARY', 'https://' . APP_DOMAIN_PRIMARY);
+    define('APP_API_BASE', 'https://api.' . APP_DOMAIN_PRIMARY);
+    define('APP_DB_ENABLED', true); // set true to enable DB connection
+
diff --git a/config/stagingdemo.txt b/config/stagingdemo.txt
deleted file mode 100755
index 11f1b23..0000000
--- a/config/stagingdemo.txt
+++ /dev/null
@@ -1 +0,0 @@
-Demo männ
\ No newline at end of file
diff --git a/debug/.gitkeep b/debug/.gitkeep
index 8b13789..e69de29 100644
--- a/debug/.gitkeep
+++ b/debug/.gitkeep
@@ -1 +0,0 @@
-
diff --git a/partials/.gitkeep b/partials/.gitkeep
deleted file mode 100644
index 8b13789..0000000
--- a/partials/.gitkeep
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/partials/landing/community/.gitkeep b/partials/landing/community/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/partials/landing/main/material-matrix.php b/partials/landing/main/material-matrix.php
index 0a2f9ae..9ad2924 100644
--- a/partials/landing/main/material-matrix.php
+++ b/partials/landing/main/material-matrix.php
@@ -1,237 +1,69 @@
-<div class="max-w-6xl mx-auto py-6 space-y-6 px-4">
-  <header class="flex items-center justify-between gap-4">
+<?php
+$app = app();
+$app->assets()->addStyle('/assets/app.css', 'early');
+$app->assets()->addScript('/assets/app.js', 'footer', true);
+?>
+
+<section class="mm-shell">
+  <header class="mm-header">
     <div>
-      <h1 class="text-2xl font-bold tracking-tight text-slate-900">3D-Druck Materialmatrix</h1>
-      <p class="text-xs text-slate-500">Schnell prüfen, welche Filamente auf welchen Druckern laufen.</p>
+      <p class="mm-kicker">Materialmatrix</p>
+      <h1 class="mm-title"><?= htmlspecialchars(t('common.title'), ENT_QUOTES) ?></h1>
+      <p class="mm-subtitle">Schnell prüfen, welche Filamente auf welchen Druckern laufen.</p>
     </div>
-    <span id="status" class="text-xs text-slate-500"></span>
+    <div class="mm-status" id="status">Bereit</div>
   </header>
 
-  <div class="bg-white/80 backdrop-blur rounded-lg shadow flex gap-6 p-4 min-h-[420px]">
-    <!-- Sidebar -->
-    <aside class="w-72 space-y-5 border-r pr-4 border-slate-100">
-      <div>
-        <h2 class="text-sm font-semibold text-slate-700 mb-2">Drucker auswählen</h2>
-        <label class="block text-xs font-medium mb-1 text-slate-600">Einzelansicht</label>
-        <select id="printerSelect" class="w-full border rounded px-2 py-1 mb-2 text-sm">
+  <div class="mm-card">
+    <aside class="mm-sidebar">
+      <div class="mm-panel">
+        <h2>Drucker auswählen</h2>
+        <label for="printerSelect">Einzelansicht</label>
+        <select id="printerSelect">
           <option value="">– wird geladen –</option>
         </select>
-        <p class="text-xs text-slate-500">
-          Zeigt die Kompatibilität nur für diesen Drucker.
-        </p>
+        <p>Zeigt die Kompatibilität nur für diesen Drucker.</p>
       </div>
 
-      <div>
-        <label class="block text-xs font-medium mb-1 text-slate-600">Vergleich (mehrere)</label>
-        <select id="printerCompare" multiple class="w-full border rounded px-2 py-1 h-32 text-sm"></select>
-        <p class="text-xs text-slate-500">
-          Strg/⌘ gedrückt halten, um mehrere zu wählen.
-        </p>
+      <div class="mm-panel">
+        <label for="printerCompare">Vergleich (mehrere)</label>
+        <select id="printerCompare" multiple></select>
+        <p>Strg/⌘ gedrückt halten, um mehrere zu wählen.</p>
       </div>
 
-      <div class="text-xs text-slate-400">
-        Tipp: Im Vergleich werden die ausgewählten Drucker rechts als separate Spalten eingefärbt.
+      <div class="mm-tip">
+        Tipp: Im Vergleich werden die ausgewählten Drucker rechts als separate Spalten hervorgehoben.
       </div>
     </aside>
 
-    <!-- Main -->
-    <main class="flex-1 flex flex-col gap-3">
-      <div class="overflow-auto max-h-[70vh] rounded border bg-white" id="tableWrap">
-        <table class="min-w-full text-sm" id="matTable">
-          <thead class="bg-slate-50">
+    <main class="mm-main">
+      <div class="mm-table-wrap" id="tableWrap">
+        <table id="matTable" class="mm-table">
+          <thead>
             <tr id="tableHead">
-              <th class="px-3 py-2 text-left">Material</th>
-              <th class="px-3 py-2 text-left">Eigenschaften</th>
-              <th class="px-3 py-2 text-left">Tg °C</th>
-              <th class="px-3 py-2 text-left">Düse</th>
-              <th class="px-3 py-2 text-left">Platte</th>
-              <th class="px-3 py-2 text-left">Zusatz</th>
-              <th class="px-3 py-2 text-left">Anwendung</th>
-              <th class="px-3 py-2 text-left">Kinder</th>
-              <th class="px-3 py-2 text-left">Emission</th>
+              <th>Material</th>
+              <th>Eigenschaften</th>
+              <th>Tg °C</th>
+              <th>Düse</th>
+              <th>Platte</th>
+              <th>Zusatz</th>
+              <th>Anwendung</th>
+              <th>Kinder</th>
+              <th>Emission</th>
             </tr>
           </thead>
           <tbody id="matBody"></tbody>
         </table>
       </div>
 
-      <div id="errorBox" class="hidden rounded bg-rose-50 border border-rose-200 text-rose-700 text-sm px-3 py-2"></div>
+      <div id="errorBox" class="mm-error" hidden></div>
 
-      <!-- Hinweisblock unten -->
-      <section id="disclaimer" class="mt-2 rounded-lg border border-slate-200 bg-slate-50 p-4 text-xs text-slate-700 leading-snug">
-        <p>
-          <strong>Hinweis:</strong> Dieses Projekt wird privat betrieben und befindet sich im Aufbau.
+      <section class="mm-disclaimer">
+        <p><strong>Hinweis:</strong> Dieses Projekt wird privat betrieben und befindet sich im Aufbau.
           Es sind noch nicht alle Drucker und Materialien eingetragen.
           Alle Angaben erfolgen nach bestem Wissen, jedoch <u>ohne Gewähr auf Vollständigkeit oder Richtigkeit</u>.
         </p>
       </section>
     </main>
   </div>
-</div>
-
-<script>
-const API_BASE = './api';
-const printerSelect = document.getElementById('printerSelect');
-const printerCompare = document.getElementById('printerCompare');
-const matBody = document.getElementById('matBody');
-const tableHead = document.getElementById('tableHead');
-const statusEl = document.getElementById('status');
-const errorBox = document.getElementById('errorBox');
-
-function showError(msg) {
-  errorBox.textContent = msg;
-  errorBox.classList.remove('hidden');
-}
-function clearError() {
-  errorBox.classList.add('hidden');
-}
-
-async function fetchJSON(url) {
-  const res = await fetch(url);
-  if (!res.ok) throw new Error('HTTP ' + res.status + ' for ' + url);
-  return await res.json();
-}
-
-async function loadPrinters() {
-  try {
-    statusEl.textContent = 'Lade Drucker …';
-    const data = await fetchJSON(`${API_BASE}/printers.php`);
-    printerSelect.innerHTML = '';
-    printerCompare.innerHTML = '';
-    if (!data.length) {
-      printerSelect.innerHTML = '<option value="">(keine Drucker gefunden)</option>';
-      statusEl.textContent = 'Keine Drucker gefunden';
-      return;
-    }
-    data.forEach(p => {
-      printerSelect.appendChild(new Option(p.name, p.id));
-      printerCompare.appendChild(new Option(p.name, p.id));
-    });
-    // ersten Drucker anzeigen
-    loadSinglePrinter(data[0].id);
-    statusEl.textContent = 'Drucker geladen';
-  } catch (err) {
-    console.error(err);
-    showError('Konnte Drucker nicht laden. Prüfe public/api/printers.php.');
-  }
-}
-
-async function loadSinglePrinter(id) {
-  if (!id) return;
-  clearError();
-  statusEl.textContent = 'Lade Materialien …';
-  try {
-    const data = await fetchJSON(`${API_BASE}/printer-materials.php?id=${id}`);
-    renderTable([data]);
-    statusEl.textContent = 'Fertig';
-  } catch (err) {
-    console.error(err);
-    showError('Konnte Materialien für Drucker nicht laden.');
-    statusEl.textContent = 'Fehler';
-  }
-}
-
-async function loadMultiplePrinters(ids) {
-  if (!ids.length) return;
-  clearError();
-  statusEl.textContent = 'Lade Vergleich …';
-  try {
-    const datasets = await Promise.all(ids.map(id => fetchJSON(`${API_BASE}/printer-materials.php?id=${id}`)));
-    renderTable(datasets);
-    statusEl.textContent = 'Vergleich geladen';
-  } catch (err) {
-    console.error(err);
-    showError('Konnte einen der gewählten Drucker nicht laden.');
-    statusEl.textContent = 'Fehler';
-  }
-}
-
-function renderTable(datasets) {
-  // Kopf neu aufbauen
-  const baseHead = `
-    <th class="px-3 py-2 text-left">Material</th>
-    <th class="px-3 py-2 text-left">Eigenschaften</th>
-    <th class="px-3 py-2 text-left">Tg °C</th>
-    <th class="px-3 py-2 text-left">Düse</th>
-    <th class="px-3 py-2 text-left">Platte</th>
-    <th class="px-3 py-2 text-left">Zusatz</th>
-    <th class="px-3 py-2 text-left">Anwendung</th>
-    <th class="px-3 py-2 text-left">Kinder</th>
-    <th class="px-3 py-2 text-left">Emission</th>
-  `;
-  let printerCols = '';
-  datasets.forEach(ds => {
-    printerCols += `<th class="px-3 py-2 text-left bg-slate-100" data-printer="${ds.printer.id}">${ds.printer.name}</th>`;
-  });
-  tableHead.innerHTML = baseHead + printerCols;
-
-  const materials = datasets[0]?.materials ?? [];
-  matBody.innerHTML = '';
-
-  materials.forEach((m, idx) => {
-    const tr = document.createElement('tr');
-    tr.className = idx % 2 === 0 ? 'bg-white' : 'bg-slate-50/60';
-
-    const kid = m.kid_safety === 'safe' ? '🌿' : (m.kid_safety === 'limited' ? '🟡' : '🔴');
-    const em  = m.emission === 'low' ? '✅' : (m.emission === 'medium' ? '⚠️' : '⛔');
-
-    let html = `
-      <td class="px-3 py-2 font-medium">${m.code}<div class="text-xs text-slate-500">${m.short_desc ?? ''}</div></td>
-      <td class="px-3 py-2">${m.properties ?? ''}</td>
-      <td class="px-3 py-2">${m.tg_celsius ?? '–'}</td>
-      <td class="px-3 py-2">${m.nozzle_req ?? ''}</td>
-      <td class="px-3 py-2">${m.plate_req ?? ''}</td>
-      <td class="px-3 py-2">${m.extra_req ?? ''}</td>
-      <td class="px-3 py-2">${m.application ?? ''}</td>
-      <td class="px-3 py-2">${kid}</td>
-      <td class="px-3 py-2">${em}</td>
-    `;
-
-    // Drucker-Spalten
-    datasets.forEach(ds => {
-      const match = ds.materials.find(x => x.id === m.id || x.code === m.code);
-      if (!match || !match.support_level) {
-        html += `<td class="px-3 py-2" data-printer="${ds.printer.id}"><span class="px-2 py-1 rounded bg-slate-200 text-xs">unbekannt</span></td>`;
-      } else {
-        let badge = '';
-        if (match.support_level === 'full') {
-          badge = '<span class="px-2 py-1 rounded bg-green-100 text-green-800 text-xs">✓ voll</span>';
-        } else if (match.support_level === 'partial') {
-          badge = '<span class="px-2 py-1 rounded bg-amber-100 text-amber-800 text-xs">⚠ teilw.</span>';
-        } else if (match.support_level === 'with_addon') {
-          badge = '<span class="px-2 py-1 rounded bg-sky-100 text-sky-800 text-xs">⚙ Zusatz</span>';
-        } else {
-          badge = '<span class="px-2 py-1 rounded bg-rose-100 text-rose-800 text-xs">✗ nein</span>';
-        }
-        const note = match.partial_reason
-          ? `<div class="text-xs text-slate-400">${match.partial_reason}</div>`
-          : (match.extra_info ? `<div class="text-xs text-slate-400">${match.extra_info}</div>` : '');
-        html += `<td class="px-3 py-2" data-printer="${ds.printer.id}">${badge}${note}</td>`;
-      }
-    });
-
-    tr.innerHTML = html;
-    matBody.appendChild(tr);
-  });
-}
-
-// Events
-printerSelect.addEventListener('change', e => {
-  const id = e.target.value;
-  if (id) {
-    loadSinglePrinter(id);
-    // Vergleich leeren
-    printerCompare.selectedIndex = -1;
-  }
-});
-
-printerCompare.addEventListener('change', e => {
-  const ids = Array.from(e.target.selectedOptions).map(o => o.value);
-  if (ids.length) {
-    loadMultiplePrinters(ids);
-  }
-});
-
-// Start
-loadPrinters();
-</script>
+</section>
diff --git a/partials/landing/search/.gitkeep b/partials/landing/search/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/partials/structure/layout_end.php b/partials/structure/layout_end.php
index 01e20ed..1871bd7 100644
--- a/partials/structure/layout_end.php
+++ b/partials/structure/layout_end.php
@@ -1,9 +1,3 @@
-<?php
-// Basic layout end.
-?>
-    <footer class="mt-10 border-t border-slate-200 py-6 text-center text-xs text-slate-500">
-      3D-Druck Materialmatrix · intern
-    </footer>
-    <?php require __DIR__ . '/matomo.php'; ?>
-  </body>
+<?php asset_scripts('footer'); ?>
+</body>
 </html>
diff --git a/partials/structure/layout_start.php b/partials/structure/layout_start.php
index 8cf2491..77c6cba 100644
--- a/partials/structure/layout_start.php
+++ b/partials/structure/layout_start.php
@@ -1,29 +1,14 @@
 <?php
-// Basic layout start.
-?><!doctype html>
+/** @var \App\App $app */
+$app = app();
+?>
+<!doctype html>
 <html lang="de">
-  <head>
-    <meta charset="utf-8">
-    <title>3D-Druck Materialmatrix</title>
-    <meta name="viewport" content="width=device-width, initial-scale=1">
-    <script src="https://cdn.tailwindcss.com"></script>
-    <style>
-      body {
-        background: radial-gradient(circle at top, #e2e8f0 0%, #f8fafc 45%, #e2e8f0 90%);
-      }
-      thead th {
-        position: sticky;
-        top: 0;
-        backdrop-filter: blur(4px);
-      }
-      th[data-printer],
-      td[data-printer] {
-        background: rgba(148, 163, 184, 0.05);
-      }
-      #disclaimer {
-        box-shadow: inset 0 1px 0 rgba(148, 163, 184, 0.25);
-      }
-    </style>
-  </head>
-  <body class="bg-slate-100 min-h-screen">
-    <?php require __DIR__ . '/nav.php'; ?>
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title><?= htmlspecialchars(t('common.title'), ENT_QUOTES) ?></title>
+  <?php asset_styles(); ?>
+  <?php asset_scripts('header'); ?>
+</head>
+<body class="app-body">
diff --git a/partials/structure/matomo.php b/partials/structure/matomo.php
deleted file mode 100644
index cfbf8ea..0000000
--- a/partials/structure/matomo.php
+++ /dev/null
@@ -1,2 +0,0 @@
-<?php
-// Matomo tracking can be added here if needed.
diff --git a/partials/structure/nav.php b/partials/structure/nav.php
deleted file mode 100644
index 5281289..0000000
--- a/partials/structure/nav.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-$activePage = $activePage ?? '';
-?>
-<header class="bg-white/80 backdrop-blur border-b border-slate-200">
-  <div class="max-w-6xl mx-auto px-4 py-3 flex items-center justify-between">
-    <div class="text-sm font-semibold text-slate-800">3D-Druck Materialmatrix</div>
-    <nav class="text-xs text-slate-500">
-      <span class="<?= $activePage === 'dashboard' ? 'text-slate-900 font-semibold' : '' ?>">Dashboard</span>
-    </nav>
-  </div>
-</header>
diff --git a/partials/landing/account/.gitkeep b/public/.gitkeep
similarity index 100%
rename from partials/landing/account/.gitkeep
rename to public/.gitkeep
diff --git a/public/.htaccess b/public/.htaccess
index 4640904..8ca4b75 100644
--- a/public/.htaccess
+++ b/public/.htaccess
@@ -1 +1,32 @@
-# TODO
+# -------------------------------------------------
+# Apache Front Controller Setup (public/.htaccess)
+# -------------------------------------------------
+
+RewriteEngine On
+
+# Sicherheit: keine Directory Listings
+Options -Indexes
+
+# -------------------------------------------------
+# 1) Assets DIREKT ausliefern
+# -------------------------------------------------
+RewriteRule ^assets/ - [L]
+
+# -------------------------------------------------
+# 2) page/ von außen sperren (nur intern per require nutzbar)
+# -------------------------------------------------
+RewriteRule ^page/ - [F,L]
+
+# -------------------------------------------------
+# 3) Alles andere an den Front Controller
+# -------------------------------------------------
+RewriteRule ^ index.php [L]
+
+# -------------------------------------------------
+# 4) (Optional) Zusätzliche Sicherheits-Header
+# -------------------------------------------------
+<IfModule mod_headers.c>
+    Header set X-Frame-Options "SAMEORIGIN"
+    Header set X-Content-Type-Options "nosniff"
+    Header set Referrer-Policy "strict-origin-when-cross-origin"
+</IfModule>
diff --git a/public/api/_db.php b/public/api/_db.php
deleted file mode 100755
index 8848260..0000000
--- a/public/api/_db.php
+++ /dev/null
@@ -1,14 +0,0 @@
-<?php
-try {
-    require_once __DIR__ . '/../../tools/db.php';
-    $pdo = tools_build_pdo();
-} catch (Throwable $e) {
-    http_response_code(500);
-    header('Content-Type: application/json; charset=utf-8');
-    $payload = ['error' => 'DB connection failed'];
-    if (getenv('APP_DEBUG') === '1') {
-        $payload['detail'] = $e->getMessage();
-    }
-    echo json_encode($payload, JSON_UNESCAPED_UNICODE);
-    exit;
-}
diff --git a/public/api/materials.php b/public/api/materials.php
deleted file mode 100755
index 3b743ed..0000000
--- a/public/api/materials.php
+++ /dev/null
@@ -1,6 +0,0 @@
-<?php
-// public/api/materials.php
-header('Content-Type: application/json; charset=utf-8');
-require __DIR__ . '/_db.php';
-$stmt = $pdo->query("SELECT * FROM materials WHERE is_active = 1 ORDER BY code");
-echo json_encode($stmt->fetchAll(), JSON_UNESCAPED_UNICODE);
diff --git a/public/api/printer-materials.php b/public/api/printer-materials.php
deleted file mode 100755
index 29ccf7f..0000000
--- a/public/api/printer-materials.php
+++ /dev/null
@@ -1,35 +0,0 @@
-<?php
-// public/api/printer-materials.php?id={printer_id}
-header('Content-Type: application/json; charset=utf-8');
-require __DIR__ . '/_db.php';
-
-$printer_id = isset($_GET['id']) ? (int)$_GET['id'] : 0;
-if ($printer_id <= 0) {
-    http_response_code(400);
-    echo json_encode(['error' => 'printer id missing']);
-    exit;
-}
-
-$printerStmt = $pdo->prepare("SELECT * FROM printers WHERE id = ?");
-$printerStmt->execute([$printer_id]);
-$printer = $printerStmt->fetch();
-if (!$printer) {
-    http_response_code(404);
-    echo json_encode(['error' => 'printer not found']);
-    exit;
-}
-
-$sql = "SELECT m.*, pms.support_level, pms.partial_reason, pms.extra_info
-        FROM materials m
-        LEFT JOIN printer_material_support pms
-          ON pms.material_id = m.id AND pms.printer_id = :pid
-        WHERE m.is_active = 1
-        ORDER BY m.code";
-$stmt = $pdo->prepare($sql);
-$stmt->execute([':pid' => $printer_id]);
-$materials = $stmt->fetchAll();
-
-echo json_encode([
-    'printer' => $printer,
-    'materials' => $materials
-], JSON_UNESCAPED_UNICODE);
diff --git a/public/api/printers.php b/public/api/printers.php
deleted file mode 100755
index 1adb40e..0000000
--- a/public/api/printers.php
+++ /dev/null
@@ -1,7 +0,0 @@
-<?php
-// public/api/printers.php
-header('Content-Type: application/json; charset=utf-8');
-require __DIR__ . '/_db.php';
-require_once __DIR__ . '/../../tools/printers.php';
-$printers = tools_fetch_active_printers($pdo);
-echo json_encode($printers, JSON_UNESCAPED_UNICODE);
diff --git a/public/assets/.gitkeep b/public/assets/.gitkeep
deleted file mode 100644
index 8b13789..0000000
--- a/public/assets/.gitkeep
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/public/assets/app.css b/public/assets/app.css
new file mode 100644
index 0000000..dc008db
--- /dev/null
+++ b/public/assets/app.css
@@ -0,0 +1,235 @@
+@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');
+
+:root {
+  --bg: #f5efe6;
+  --bg-accent: #eef1f8;
+  --ink: #1d1d1f;
+  --muted: #5b5b64;
+  --card: #ffffff;
+  --line: #e2e2e8;
+  --accent: #ffb454;
+  --accent-dark: #eb7b1c;
+  --ok: #1f8a4c;
+  --warn: #d97706;
+  --no: #b91c1c;
+  --shadow: 0 22px 60px rgba(20, 20, 45, 0.08);
+}
+
+* { box-sizing: border-box; }
+
+.app-body {
+  margin: 0;
+  font-family: 'Space Grotesk', system-ui, sans-serif;
+  color: var(--ink);
+  background: radial-gradient(circle at 20% 10%, rgba(255, 210, 150, 0.35), transparent 55%),
+              radial-gradient(circle at 90% 5%, rgba(185, 221, 255, 0.35), transparent 60%),
+              var(--bg);
+  min-height: 100vh;
+}
+
+.mm-shell {
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 3rem 2rem 4rem;
+  animation: fadeUp 0.6s ease both;
+}
+
+.mm-header {
+  display: flex;
+  align-items: flex-end;
+  justify-content: space-between;
+  gap: 2rem;
+  margin-bottom: 2rem;
+}
+
+.mm-kicker {
+  text-transform: uppercase;
+  letter-spacing: 0.2em;
+  font-size: 0.7rem;
+  color: var(--muted);
+  margin: 0 0 0.6rem 0;
+}
+
+.mm-title {
+  font-size: clamp(2rem, 2.6vw, 2.8rem);
+  margin: 0;
+}
+
+.mm-subtitle {
+  margin: 0.5rem 0 0;
+  color: var(--muted);
+  max-width: 36rem;
+}
+
+.mm-status {
+  font-family: 'IBM Plex Mono', ui-monospace, monospace;
+  font-size: 0.85rem;
+  padding: 0.4rem 0.8rem;
+  border-radius: 999px;
+  border: 1px solid var(--line);
+  background: var(--card);
+}
+
+.mm-card {
+  display: grid;
+  grid-template-columns: 280px 1fr;
+  gap: 1.5rem;
+  background: var(--card);
+  border: 1px solid var(--line);
+  border-radius: 24px;
+  padding: 1.75rem;
+  box-shadow: var(--shadow);
+}
+
+.mm-sidebar {
+  display: flex;
+  flex-direction: column;
+  gap: 1.5rem;
+  border-right: 1px dashed var(--line);
+  padding-right: 1.5rem;
+}
+
+.mm-panel h2 {
+  font-size: 1rem;
+  margin: 0 0 0.5rem 0;
+}
+
+.mm-panel label {
+  display: block;
+  font-weight: 600;
+  font-size: 0.85rem;
+  margin-bottom: 0.4rem;
+  color: var(--muted);
+}
+
+.mm-panel select {
+  width: 100%;
+  border: 1px solid var(--line);
+  border-radius: 12px;
+  padding: 0.55rem 0.75rem;
+  font-size: 0.95rem;
+  background: #fff;
+}
+
+.mm-panel p {
+  margin: 0.5rem 0 0;
+  color: var(--muted);
+  font-size: 0.85rem;
+}
+
+.mm-tip {
+  font-size: 0.8rem;
+  color: var(--muted);
+  padding: 0.75rem;
+  border-radius: 16px;
+  background: var(--bg-accent);
+}
+
+.mm-main {
+  display: flex;
+  flex-direction: column;
+  gap: 1rem;
+}
+
+.mm-table-wrap {
+  overflow: auto;
+  border-radius: 16px;
+  border: 1px solid var(--line);
+  background: #fff;
+  max-height: 70vh;
+}
+
+.mm-table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 0.9rem;
+}
+
+.mm-table thead th {
+  position: sticky;
+  top: 0;
+  background: #f8f8fb;
+  padding: 0.75rem;
+  text-align: left;
+  font-weight: 600;
+  border-bottom: 1px solid var(--line);
+}
+
+.mm-table tbody td {
+  padding: 0.7rem 0.75rem;
+  border-bottom: 1px solid #f0f0f4;
+  vertical-align: top;
+}
+
+.mm-table tbody tr:nth-child(even) {
+  background: #fcfcff;
+}
+
+.mm-table tbody tr.is-alt {
+  background: #fcfcff;
+}
+
+.mm-table [data-printer] {
+  background: rgba(248, 247, 255, 0.8);
+}
+
+.mm-tag {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.4rem;
+  border-radius: 999px;
+  padding: 0.25rem 0.6rem;
+  font-size: 0.75rem;
+  font-weight: 600;
+}
+
+.mm-tag.ok { background: rgba(31, 138, 76, 0.12); color: var(--ok); }
+.mm-tag.warn { background: rgba(217, 119, 6, 0.12); color: var(--warn); }
+.mm-tag.no { background: rgba(185, 28, 28, 0.12); color: var(--no); }
+.mm-tag.addon { background: rgba(59, 130, 246, 0.12); color: #1d4ed8; }
+
+.mm-sub {
+  font-size: 0.75rem;
+  color: var(--muted);
+  margin-top: 0.25rem;
+}
+
+.mm-error {
+  padding: 0.75rem 1rem;
+  border-radius: 12px;
+  border: 1px solid rgba(185, 28, 28, 0.25);
+  background: rgba(185, 28, 28, 0.08);
+  color: var(--no);
+  font-size: 0.9rem;
+}
+
+.mm-disclaimer {
+  background: #f9fafc;
+  border: 1px solid var(--line);
+  border-radius: 16px;
+  padding: 1rem 1.25rem;
+  font-size: 0.85rem;
+  color: var(--muted);
+}
+
+@keyframes fadeUp {
+  from { opacity: 0; transform: translateY(12px); }
+  to { opacity: 1; transform: translateY(0); }
+}
+
+@media (max-width: 980px) {
+  .mm-card {
+    grid-template-columns: 1fr;
+  }
+  .mm-sidebar {
+    border-right: none;
+    border-bottom: 1px dashed var(--line);
+    padding-right: 0;
+    padding-bottom: 1rem;
+  }
+}
+
+@media (max-width: 720px) {
+  .mm-shell { padding: 2rem 1.25rem 3rem; }
+  .mm-header { flex-direction: column; align-items: flex-start; }
+}
diff --git a/public/assets/app.js b/public/assets/app.js
new file mode 100644
index 0000000..4ecc43f
--- /dev/null
+++ b/public/assets/app.js
@@ -0,0 +1,200 @@
+(function () {
+  const API_BASE = '/api';
+  const printerSelect = document.getElementById('printerSelect');
+  const printerCompare = document.getElementById('printerCompare');
+  const matBody = document.getElementById('matBody');
+  const tableHead = document.getElementById('tableHead');
+  const statusEl = document.getElementById('status');
+  const errorBox = document.getElementById('errorBox');
+
+  if (!printerSelect || !printerCompare || !matBody || !tableHead) {
+    return;
+  }
+
+  function setStatus(text) {
+    if (statusEl) {
+      statusEl.textContent = text;
+    }
+  }
+
+  function showError(msg) {
+    if (!errorBox) return;
+    errorBox.hidden = false;
+    errorBox.textContent = msg;
+  }
+
+  function clearError() {
+    if (!errorBox) return;
+    errorBox.hidden = true;
+    errorBox.textContent = '';
+  }
+
+  function escapeHtml(value) {
+    return String(value ?? '')
+      .replace(/&/g, '&amp;')
+      .replace(/</g, '&lt;')
+      .replace(/>/g, '&gt;')
+      .replace(/"/g, '&quot;')
+      .replace(/'/g, '&#39;');
+  }
+
+  async function fetchJSON(path) {
+    const res = await fetch(API_BASE + path, { headers: { 'Accept': 'application/json' } });
+    if (!res.ok) throw new Error('HTTP ' + res.status + ' for ' + path);
+    return await res.json();
+  }
+
+  async function loadPrinters() {
+    try {
+      setStatus('Lade Drucker ...');
+      const data = await fetchJSON('/printers');
+      printerSelect.innerHTML = '';
+      printerCompare.innerHTML = '';
+
+      if (!Array.isArray(data) || data.length === 0) {
+        printerSelect.innerHTML = '<option value="">(keine Drucker gefunden)</option>';
+        setStatus('Keine Drucker gefunden');
+        return;
+      }
+
+      data.forEach(p => {
+        printerSelect.appendChild(new Option(p.name, p.id));
+        printerCompare.appendChild(new Option(p.name, p.id));
+      });
+
+      loadSinglePrinter(data[0].id);
+      setStatus('Drucker geladen');
+    } catch (err) {
+      console.error(err);
+      showError('Konnte Drucker nicht laden.');
+      setStatus('Fehler');
+    }
+  }
+
+  async function loadSinglePrinter(id) {
+    if (!id) return;
+    clearError();
+    setStatus('Lade Materialien ...');
+    try {
+      const data = await fetchJSON('/printer-materials?id=' + encodeURIComponent(id));
+      renderTable([data]);
+      setStatus('Fertig');
+    } catch (err) {
+      console.error(err);
+      showError('Konnte Materialien für den Drucker nicht laden.');
+      setStatus('Fehler');
+    }
+  }
+
+  async function loadMultiplePrinters(ids) {
+    if (!ids.length) return;
+    clearError();
+    setStatus('Lade Vergleich ...');
+    try {
+      const datasets = await Promise.all(
+        ids.map(id => fetchJSON('/printer-materials?id=' + encodeURIComponent(id)))
+      );
+      renderTable(datasets);
+      setStatus('Vergleich geladen');
+    } catch (err) {
+      console.error(err);
+      showError('Konnte einen der gewählten Drucker nicht laden.');
+      setStatus('Fehler');
+    }
+  }
+
+  function renderTable(datasets) {
+    const baseHead = [
+      'Material',
+      'Eigenschaften',
+      'Tg °C',
+      'Düse',
+      'Platte',
+      'Zusatz',
+      'Anwendung',
+      'Kinder',
+      'Emission'
+    ].map(label => `<th>${label}</th>`).join('');
+
+    let printerCols = '';
+    datasets.forEach(ds => {
+      if (ds && ds.printer) {
+        printerCols += `<th data-printer="${escapeHtml(ds.printer.id)}">${escapeHtml(ds.printer.name)}</th>`;
+      }
+    });
+
+    tableHead.innerHTML = baseHead + printerCols;
+
+    const materials = (datasets[0] && datasets[0].materials) ? datasets[0].materials : [];
+    matBody.innerHTML = '';
+
+    if (!materials.length) {
+      const empty = document.createElement('tr');
+      empty.innerHTML = '<td colspan="12">Keine Materialien gefunden.</td>';
+      matBody.appendChild(empty);
+      return;
+    }
+
+    materials.forEach((m, idx) => {
+      const tr = document.createElement('tr');
+      tr.className = idx % 2 === 0 ? '' : 'is-alt';
+
+      const kid = m.kid_safety === 'safe' ? 'grün' : (m.kid_safety === 'limited' ? 'gelb' : 'rot');
+      const em = m.emission === 'low' ? 'niedrig' : (m.emission === 'medium' ? 'mittel' : 'hoch');
+
+      let html = '';
+      html += `<td><strong>${escapeHtml(m.code)}</strong><div class="mm-sub">${escapeHtml(m.short_desc || '')}</div></td>`;
+      html += `<td>${escapeHtml(m.properties || '')}</td>`;
+      html += `<td>${escapeHtml(m.tg_celsius || '–')}</td>`;
+      html += `<td>${escapeHtml(m.nozzle_req || '')}</td>`;
+      html += `<td>${escapeHtml(m.plate_req || '')}</td>`;
+      html += `<td>${escapeHtml(m.extra_req || '')}</td>`;
+      html += `<td>${escapeHtml(m.application || '')}</td>`;
+      html += `<td>${escapeHtml(kid)}</td>`;
+      html += `<td>${escapeHtml(em)}</td>`;
+
+      datasets.forEach(ds => {
+        const printerId = ds && ds.printer ? ds.printer.id : '';
+        const match = ds.materials.find(x => x.id === m.id || x.code === m.code);
+        if (!match || !match.support_level) {
+          html += `<td data-printer="${escapeHtml(printerId)}"><span class="mm-tag">unbekannt</span></td>`;
+        } else {
+          let badge = '';
+          if (match.support_level === 'full') {
+            badge = '<span class="mm-tag ok">voll</span>';
+          } else if (match.support_level === 'partial') {
+            badge = '<span class="mm-tag warn">teilw.</span>';
+          } else if (match.support_level === 'with_addon') {
+            badge = '<span class="mm-tag addon">Zusatz</span>';
+          } else {
+            badge = '<span class="mm-tag no">nein</span>';
+          }
+          const note = match.partial_reason
+            ? `<div class="mm-sub">${escapeHtml(match.partial_reason)}</div>`
+            : (match.extra_info ? `<div class="mm-sub">${escapeHtml(match.extra_info)}</div>` : '');
+          html += `<td data-printer="${escapeHtml(printerId)}">${badge}${note}</td>`;
+        }
+      });
+
+      tr.innerHTML = html;
+      matBody.appendChild(tr);
+    });
+  }
+
+  printerSelect.addEventListener('change', e => {
+    const id = e.target.value;
+    if (id) {
+      loadSinglePrinter(id);
+      printerCompare.selectedIndex = -1;
+    }
+  });
+
+  printerCompare.addEventListener('change', e => {
+    const ids = Array.from(e.target.selectedOptions).map(o => o.value);
+    if (ids.length) {
+      loadMultiplePrinters(ids);
+    }
+  });
+
+  loadPrinters();
+})();
diff --git a/public/assets/bilder/.gitkeep b/public/assets/bilder/.gitkeep
deleted file mode 100644
index 8b13789..0000000
--- a/public/assets/bilder/.gitkeep
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/public/assets/css/.gitkeep b/public/assets/css/.gitkeep
deleted file mode 100644
index 8b13789..0000000
--- a/public/assets/css/.gitkeep
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/public/assets/fonts/.gitkeep b/public/assets/fonts/.gitkeep
deleted file mode 100644
index 8b13789..0000000
--- a/public/assets/fonts/.gitkeep
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/public/assets/js/.gitkeep b/public/assets/js/.gitkeep
deleted file mode 100644
index 8b13789..0000000
--- a/public/assets/js/.gitkeep
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/public/index.php b/public/index.php
index 1a7ad0c..04c65ea 100644
--- a/public/index.php
+++ b/public/index.php
@@ -1,2 +1,88 @@
 <?php
-require __DIR__ . '/page/dashboard.php';
+declare(strict_types=1);
+
+// boot application (config, autoload, services)
+require_once __DIR__ . '/../config/fileload.php';
+
+// Staging-Access-Protection (Basic Auth)
+$uriPath = parse_url($_SERVER['REQUEST_URI'] ?? '/', PHP_URL_PATH) ?: '/';
+$uriPath = preg_replace('~/{2,}~', '/', $uriPath);
+$uriPath = trim($uriPath, '/');
+$isRetoolPath = ($uriPath === 'retool' || str_starts_with($uriPath, 'retool/'));
+if (defined('APP_ENV') && APP_ENV === 'staging' && !$isRetoolPath) {
+    $authUser = getenv('STAGING_AUTH_USER') ?: 'staging';
+    $authPass = getenv('STAGING_AUTH_PASS') ?: 'staging123';
+    $user = $_SERVER['PHP_AUTH_USER'] ?? null;
+    $pass = $_SERVER['PHP_AUTH_PW'] ?? null;
+    if ($user !== $authUser || $pass !== $authPass) {
+        header('WWW-Authenticate: Basic realm="Staging"');
+        header('HTTP/1.0 401 Unauthorized');
+        echo 'Unauthorized';
+        exit;
+    }
+}
+
+// Sicherheitscheck
+if (str_contains($uriPath, '..')) {
+    http_response_code(400);
+    exit('Bad request');
+}
+
+// Root → page/index.php
+if ($uriPath === '' || $uriPath === 'index' || $uriPath === 'index.php') {
+    $target = __DIR__ . '/page/index.php';
+} else {
+    $base = __DIR__ . '/page/' . $uriPath;
+    // 1) Verzeichnis mit index.php
+    if (is_dir($base) && is_file($base . '/index.php')) {
+        $target = $base . '/index.php';
+    }
+    // 2) Datei
+    elseif (is_file($base . '.php')) {
+
+        $target = $base . '.php';
+    }
+    // 3) 404
+    elseif (is_file($base)) {
+
+        $target = $base;
+    }
+    // 3) 404
+    else {
+        http_response_code(404);
+        $target = __DIR__ . '/page/404.php';
+    }
+}
+// ------------------------------------
+// Layout-Regel
+// ------------------------------------
+$skipLayout = false;
+$targetReal = realpath($target);
+
+// Beispiel: alles unter /page/raw/* ohne Layout
+if ($targetReal && str_starts_with($targetReal, realpath(__DIR__ . '/page/retool'))) {
+    $skipLayout = true;
+}
+
+// ------------------------------------
+// Ausgabe
+// ------------------------------------
+// Erst Inhalt laden (ohne Ausgabe), damit Header/Redirects vor HTML funktionieren
+ob_start();
+require $target;
+$content = ob_get_clean();
+
+// Wenn bereits Header gesendet wurden (z. B. eigener Redirect/Content-Type), Layout überspringen
+if (headers_sent()) {
+    $skipLayout = true;
+}
+
+if (!$skipLayout) {
+    tpl('layout_start', 'structure');
+}
+
+echo $content;
+
+if (!$skipLayout) {
+    tpl('layout_end', 'structure');
+}
diff --git a/public/page/404.php b/public/page/404.php
new file mode 100644
index 0000000..b6f11a1
--- /dev/null
+++ b/public/page/404.php
@@ -0,0 +1,7 @@
+<?php
+http_response_code(404);
+?>
+<section class="mm-shell">
+  <h1 class="mm-title">Seite nicht gefunden</h1>
+  <p class="mm-subtitle">Die angeforderte Seite existiert nicht.</p>
+</section>
diff --git a/public/page/api/materials.php b/public/page/api/materials.php
new file mode 100644
index 0000000..3928030
--- /dev/null
+++ b/public/page/api/materials.php
@@ -0,0 +1,19 @@
+<?php
+declare(strict_types=1);
+
+header('Content-Type: application/json; charset=utf-8');
+
+$app = app();
+$pdo = $app->pdo();
+
+if (!$pdo) {
+    http_response_code(500);
+    echo json_encode(['error' => 'DB disabled or unavailable'], JSON_UNESCAPED_UNICODE);
+    exit;
+}
+
+$repo = new \App\Repository\MaterialMatrixRepository($pdo);
+$materials = $repo->listActiveMaterials();
+
+echo json_encode($materials, JSON_UNESCAPED_UNICODE);
+exit;
diff --git a/public/page/api/printer-materials.php b/public/page/api/printer-materials.php
new file mode 100644
index 0000000..4155ad6
--- /dev/null
+++ b/public/page/api/printer-materials.php
@@ -0,0 +1,37 @@
+<?php
+declare(strict_types=1);
+
+header('Content-Type: application/json; charset=utf-8');
+
+$printerId = isset($_GET['id']) ? (int)$_GET['id'] : 0;
+if ($printerId <= 0) {
+    http_response_code(400);
+    echo json_encode(['error' => 'printer id missing'], JSON_UNESCAPED_UNICODE);
+    exit;
+}
+
+$app = app();
+$pdo = $app->pdo();
+
+if (!$pdo) {
+    http_response_code(500);
+    echo json_encode(['error' => 'DB disabled or unavailable'], JSON_UNESCAPED_UNICODE);
+    exit;
+}
+
+$repo = new \App\Repository\MaterialMatrixRepository($pdo);
+$printer = $repo->getPrinterById($printerId);
+
+if (!$printer) {
+    http_response_code(404);
+    echo json_encode(['error' => 'printer not found'], JSON_UNESCAPED_UNICODE);
+    exit;
+}
+
+$materials = $repo->listMaterialsForPrinter($printerId);
+
+echo json_encode([
+    'printer' => $printer,
+    'materials' => $materials,
+], JSON_UNESCAPED_UNICODE);
+exit;
diff --git a/public/page/api/printers.php b/public/page/api/printers.php
new file mode 100644
index 0000000..38fd4be
--- /dev/null
+++ b/public/page/api/printers.php
@@ -0,0 +1,19 @@
+<?php
+declare(strict_types=1);
+
+header('Content-Type: application/json; charset=utf-8');
+
+$app = app();
+$pdo = $app->pdo();
+
+if (!$pdo) {
+    http_response_code(500);
+    echo json_encode(['error' => 'DB disabled or unavailable'], JSON_UNESCAPED_UNICODE);
+    exit;
+}
+
+$repo = new \App\Repository\MaterialMatrixRepository($pdo);
+$printers = $repo->listActivePrinters();
+
+echo json_encode($printers, JSON_UNESCAPED_UNICODE);
+exit;
diff --git a/public/page/dashboard.php b/public/page/dashboard.php
deleted file mode 100644
index 47dcce4..0000000
--- a/public/page/dashboard.php
+++ /dev/null
@@ -1,5 +0,0 @@
-<?php
-$activePage = 'dashboard';
-require __DIR__ . '/../../partials/structure/layout_start.php';
-require __DIR__ . '/../../partials/landing/main/material-matrix.php';
-require __DIR__ . '/../../partials/structure/layout_end.php';
diff --git a/public/page/index.php b/public/page/index.php
new file mode 100644
index 0000000..a9e07b2
--- /dev/null
+++ b/public/page/index.php
@@ -0,0 +1,2 @@
+<?php
+tpl('material-matrix', 'landing', 'main');
diff --git a/public/test.fff b/public/test.fff
deleted file mode 100644
index 8a65fe5..0000000
--- a/public/test.fff
+++ /dev/null
@@ -1 +0,0 @@
-dfdfassa
\ No newline at end of file
diff --git a/src/.gitkeep b/src/.gitkeep
index 8b13789..e69de29 100644
--- a/src/.gitkeep
+++ b/src/.gitkeep
@@ -1 +0,0 @@
-
diff --git a/src/App/AccountPages.php b/src/App/AccountPages.php
index e5553d8..24c173a 100644
--- a/src/App/AccountPages.php
+++ b/src/App/AccountPages.php
@@ -1 +1,398 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class AccountPages
+{
+    public static function register(App $app): array
+    {
+        $flash = $app->flash()->get();
+        $isLoggedIn = isset($_SESSION['user_id']);
+        $error = '';
+        $displayName = '';
+        $email = '';
+
+        if ($isLoggedIn) {
+            redirect('/dashboard');
+        }
+
+        if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+            $displayName = trim((string)($_POST['display_name'] ?? ''));
+            $email = trim((string)($_POST['email'] ?? ''));
+            $password = (string)($_POST['password'] ?? '');
+            $password2 = (string)($_POST['password_confirm'] ?? '');
+
+            if ($password !== $password2) {
+                $error = 'Passwörter stimmen nicht überein.';
+            } elseif (strlen($password) < 8) {
+                $error = 'Passwort muss mindestens 8 Zeichen haben.';
+            } else {
+                try {
+                    $auth = new Auth($app);
+                    $userId = $auth->register($displayName, $email, $password);
+                    $code = $auth->createVerifyCode($userId, $email);
+                    $mailer = new Mailer($app);
+                    $mailer->sendTemplate('registration_confirm', $email, [
+                        'code' => $code,
+                        'display_name' => $displayName,
+                    ]);
+                    $_SESSION['verify_email'] = $email;
+                    $app->flash()->set('info', 'Bitte bestätige deine Registrierung mit dem Code aus der E-Mail.');
+                    redirect('/verify');
+                } catch (\Throwable $e) {
+                    $error = $e->getMessage();
+                }
+            }
+        }
+
+        return compact('flash', 'error', 'displayName', 'email');
+    }
+
+    public static function login(App $app): array
+    {
+        $flash = $app->flash()->get();
+        $isLoggedIn = isset($_SESSION['user_id']);
+        $error = '';
+        $emailPrefill = '';
+
+        if ($isLoggedIn) {
+            redirect('/dashboard');
+        }
+
+        if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+            $email = trim((string)($_POST['email'] ?? ''));
+            $emailPrefill = $email;
+            $password = (string)($_POST['password'] ?? '');
+            try {
+                $auth = new Auth($app);
+                $res = $auth->login($email, $password);
+                if ($res['status'] === 'pending') {
+                    $code = $auth->createVerifyCode($res['id'], $email);
+                    $mailer = new Mailer($app);
+                    $mailer->sendTemplate('registration_confirm', $email, [
+                        'code' => $code,
+                        'display_name' => $email,
+                    ]);
+                    $_SESSION['verify_email'] = $email;
+                    $app->flash()->set('info', 'Bitte bestätige deine Registrierung mit dem Code aus der E-Mail.');
+                    redirect('/verify');
+                }
+                $_SESSION['user_id'] = $res['id'];
+                $app->flash()->set('success', 'Erfolgreich angemeldet.');
+                redirect('/dashboard');
+            } catch (\Throwable $e) {
+                $error = $e->getMessage();
+            }
+        }
+
+        return compact('flash', 'error', 'emailPrefill', 'isLoggedIn');
+    }
+
+    public static function verify(App $app): array
+    {
+        $pdo = $app->pdo();
+        $flash = $app->flash()->get();
+        $error = '';
+        $info = '';
+        $email = $_SESSION['verify_email'] ?? '';
+
+        if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+            $action = $_POST['action'] ?? 'verify';
+            $email = trim((string)($_POST['email'] ?? ''));
+            $code = strtoupper(trim((string)($_POST['code'] ?? '')));
+            $auth = new Auth($app);
+            $mailer = new Mailer($app);
+
+            if ($action === 'resend') {
+                try {
+                    $stmt = $pdo?->prepare('SELECT id, display_name, status FROM users u JOIN user_profiles p ON p.user_id = u.id WHERE u.email = :email LIMIT 1');
+                    $stmt?->execute(['email' => $email]);
+                    $row = $stmt?->fetch(\PDO::FETCH_ASSOC);
+                    if (!$row) {
+                        throw new \RuntimeException('E-Mail nicht gefunden.');
+                    }
+                    $userId = (int)$row['id'];
+                    $codeNew = $auth->createVerifyCode($userId, $email);
+                    $mailer->sendTemplate('registration_resend_code', $email, [
+                        'code' => $codeNew,
+                        'display_name' => $row['display_name'] ?? '',
+                    ]);
+                    $info = 'Neuer Code wurde versendet.';
+                    $_SESSION['verify_email'] = $email;
+                } catch (\Throwable $e) {
+                    $error = $e->getMessage();
+                }
+            } else {
+                try {
+                    $userId = $auth->verifyCode($email, $code);
+                    $_SESSION['user_id'] = $userId;
+                    unset($_SESSION['verify_email']);
+                    $mailer->sendTemplate('registration_welcome', $email, ['display_name' => $email]);
+                    $app->flash()->set('success', 'Registrierung bestätigt. Willkommen!');
+                    redirect('/dashboard');
+                } catch (\Throwable $e) {
+                    $error = $e->getMessage();
+                }
+            }
+        }
+
+        return compact('flash', 'error', 'info', 'email');
+    }
+
+    public static function dashboard(App $app): array
+    {
+        if (!isset($_SESSION['user_id'])) {
+            redirect('/login');
+        }
+
+        $pdo = $app->pdo();
+        $flash = $app->flash()->get();
+        $userId = (int)$_SESSION['user_id'];
+        $error = '';
+        $info = '';
+        $crypto = null;
+        try { $crypto = new Crypto($app->config()); } catch (\Throwable) {}
+
+        if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+            $action = $_POST['action'] ?? '';
+            try {
+                if ($action === 'profile') {
+                    $languages = $_POST['languages'] ?? '';
+                    if (is_array($languages)) {
+                        $languages = implode(', ', array_map('trim', $languages));
+                    }
+                    $phoneEnc = $crypto ? $crypto->encrypt(trim((string)$_POST['contact_phone'])) : trim((string)$_POST['contact_phone']);
+                    $stmt = $pdo?->prepare('UPDATE user_profiles SET display_name=:name, first_name=:fname, last_name=:lname, zip=:zip, city=:city, profession=:prof, languages=:langs, about=:about, contact_phone=:phone, updated_at=NOW() WHERE user_id=:id');
+                    $stmt?->execute([
+                        'name'  => trim((string)$_POST['display_name']),
+                        'fname' => trim((string)$_POST['first_name']),
+                        'lname' => trim((string)$_POST['last_name']),
+                        'zip'   => trim((string)$_POST['zip']),
+                        'city'  => trim((string)$_POST['city']),
+                        'prof'  => trim((string)$_POST['profession']),
+                        'langs' => trim((string)$languages),
+                        'about' => trim((string)$_POST['about']),
+                        'phone' => $phoneEnc,
+                        'id'    => $userId,
+                    ]);
+                    $info = 'Profil gespeichert.';
+                } elseif ($action === 'child_add') {
+                    $firstNameEnc = $crypto ? $crypto->encrypt(trim((string)$_POST['first_name'])) : trim((string)$_POST['first_name']);
+                    $noteEnc = $crypto ? $crypto->encrypt(trim((string)$_POST['note'])) : trim((string)$_POST['note']);
+                    $stmt = $pdo?->prepare('INSERT INTO children (user_id, gender, birthdate, age_years, encrypted_first_name, note, created_at, updated_at) VALUES (:uid, :gender, :birthdate, :age, :name, :note, NOW(), NOW())');
+                    $stmt?->execute([
+                        'uid' => $userId,
+                        'gender' => $_POST['gender'] ?? 'unknown',
+                        'birthdate' => $_POST['birthdate'] ?: null,
+                        'age' => $_POST['age_years'] ?: null,
+                        'name' => $firstNameEnc,
+                        'note' => $noteEnc,
+                    ]);
+                    $info = 'Kind hinzugefügt.';
+                } elseif ($action === 'event_add' || $action === 'event_update') {
+                    $street = trim((string)($_POST['street'] ?? ''));
+                    $zip = trim((string)($_POST['zip'] ?? ''));
+                    $city = trim((string)($_POST['city'] ?? ''));
+                    $region = trim((string)($_POST['region'] ?? ''));
+                    $lat = isset($_POST['lat']) && $_POST['lat'] !== '' ? (float)$_POST['lat'] : null;
+                    $lng = isset($_POST['lng']) && $_POST['lng'] !== '' ? (float)$_POST['lng'] : null;
+                    $needsGeocode = ($lat === null || $lng === null || $region === '');
+                    if ($needsGeocode) {
+                        [$geoLat, $geoLng, $geoRegion] = self::geocodeAddress($street, $zip, $city, $region);
+                        if ($lat === null) { $lat = $geoLat; }
+                        if ($lng === null) { $lng = $geoLng; }
+                        if ($region === '' && $geoRegion) { $region = $geoRegion; }
+                    }
+
+                    if ($action === 'event_add') {
+                        $stmt = $pdo?->prepare('INSERT INTO events (created_by, title, teaser_public, description, location_label, street, zip, city, region, lat, lng, starts_at, allow_kids, visibility, status, created_at, updated_at) VALUES (:uid, :title, :teaser, :descr, :loc, :street, :zip, :city, :region, :lat, :lng, :start, :allow, :vis, :status, NOW(), NOW())');
+                        $stmt?->execute([
+                            'uid' => $userId,
+                            'title' => trim((string)$_POST['title']),
+                            'teaser' => trim((string)$_POST['teaser']),
+                            'descr' => trim((string)$_POST['description']),
+                            'loc' => trim((string)$_POST['location_label']),
+                            'street' => $street ?: null,
+                            'zip' => $zip,
+                            'city' => $city,
+                            'region' => $region,
+                            'lat' => $lat,
+                            'lng' => $lng,
+                            'start' => $_POST['starts_at'] ?? null,
+                            'allow' => isset($_POST['allow_kids']) ? 0 : 1,
+                            'vis' => $_POST['visibility'] ?? 'public',
+                            'status' => 'published',
+                        ]);
+                        $info = 'Event gespeichert.';
+                        // Punkte für Event-Erstellung vergeben
+                        try {
+                            $cfgPath = dirname(__DIR__, 2) . '/config/community.php';
+                            $communityCfg = file_exists($cfgPath) ? require $cfgPath : [];
+                            $community = new Community($pdo, $communityCfg);
+                            $community->addPoints($userId, 'event', 'create', ['event_id' => $pdo?->lastInsertId()]);
+                        } catch (\Throwable) {
+                            // still continue, points optional
+                        }
+                    } else {
+                        $eventId = (int)($_POST['event_id'] ?? 0);
+                        $stmt = $pdo?->prepare('UPDATE events SET title=:title, teaser_public=:teaser, description=:descr, location_label=:loc, street=:street, zip=:zip, city=:city, region=:region, lat=:lat, lng=:lng, starts_at=:start, allow_kids=:allow, visibility=:vis, updated_at=NOW() WHERE id=:id AND created_by=:uid');
+                        $stmt?->execute([
+                            'id' => $eventId,
+                            'uid' => $userId,
+                            'title' => trim((string)$_POST['title']),
+                            'teaser' => trim((string)$_POST['teaser']),
+                            'descr' => trim((string)$_POST['description']),
+                            'loc' => trim((string)$_POST['location_label']),
+                            'street' => $street ?: null,
+                            'zip' => $zip,
+                            'city' => $city,
+                            'region' => $region,
+                            'lat' => $lat,
+                            'lng' => $lng,
+                            'start' => $_POST['starts_at'] ?? null,
+                            'allow' => isset($_POST['allow_kids']) ? 0 : 1,
+                            'vis' => $_POST['visibility'] ?? 'public',
+                        ]);
+                        $info = 'Event aktualisiert.';
+                    }
+                } elseif ($action === 'event_delete') {
+                    $eventId = (int)($_POST['event_id'] ?? 0);
+                    $stmt = $pdo?->prepare('SELECT id, created_by, status, (SELECT COUNT(*) FROM event_participants ep WHERE ep.event_id = events.id) AS participant_count FROM events WHERE id = :id LIMIT 1');
+                    $stmt?->execute(['id' => $eventId]);
+                    $ev = $stmt?->fetch(\PDO::FETCH_ASSOC);
+                    if (!$ev || (int)$ev['created_by'] !== $userId) {
+                        throw new \RuntimeException('Event nicht gefunden.');
+                    }
+                    if ((int)$ev['participant_count'] > 0) {
+                        throw new \RuntimeException('Event hat Anmeldungen und kann nicht gelöscht werden.');
+                    }
+                    $pdo?->prepare('DELETE FROM events WHERE id = :id')->execute(['id' => $eventId]);
+                    $info = 'Event gelöscht.';
+                } elseif ($action === 'event_cancel') {
+                    $eventId = (int)($_POST['event_id'] ?? 0);
+                    $stmt = $pdo?->prepare('SELECT id, created_by FROM events WHERE id = :id LIMIT 1');
+                    $stmt?->execute(['id' => $eventId]);
+                    $ev = $stmt?->fetch(\PDO::FETCH_ASSOC);
+                    if (!$ev || (int)$ev['created_by'] !== $userId) {
+                        throw new \RuntimeException('Event nicht gefunden.');
+                    }
+                    $pdo?->prepare('UPDATE events SET status = :st, updated_at = NOW() WHERE id = :id')->execute([
+                        'st' => 'cancelled',
+                        'id' => $eventId,
+                    ]);
+                    $info = 'Event wurde abgesagt.';
+                }
+            } catch (\Throwable $e) {
+                $error = $e->getMessage();
+            }
+        }
+
+        // Daten laden
+        $profile = [
+            'display_name' => '',
+            'first_name' => '',
+            'last_name' => '',
+            'zip' => '',
+            'city' => '',
+            'profession' => '',
+            'languages' => '',
+            'about' => '',
+            'email' => '',
+            'contact_phone' => '',
+        ];
+        $stmt = $pdo?->prepare('SELECT u.email, u.status, p.display_name, p.first_name, p.last_name, p.zip, p.city, p.profession, p.languages, p.about, p.contact_phone FROM users u LEFT JOIN user_profiles p ON p.user_id = u.id WHERE u.id = :id LIMIT 1');
+        $stmt?->execute(['id' => $userId]);
+        $row = $stmt?->fetch(\PDO::FETCH_ASSOC);
+        if ($row) {
+            $profile = array_merge($profile, array_filter($row, fn($v) => $v !== null));
+            if ($crypto && !empty($profile['contact_phone'])) {
+                $profile['contact_phone'] = $crypto->decrypt((string)$profile['contact_phone']) ?: '';
+            }
+        }
+
+        $children = [];
+        $stmt = $pdo?->prepare('SELECT id, encrypted_first_name AS first_name, note, gender, birthdate, age_years FROM children WHERE user_id = :id ORDER BY id DESC');
+        $stmt?->execute(['id' => $userId]);
+        $childrenRaw = $stmt?->fetchAll(\PDO::FETCH_ASSOC) ?: [];
+        foreach ($childrenRaw as $c) {
+            if ($crypto) {
+                $c['first_name'] = $crypto->decrypt((string)$c['first_name']) ?: '';
+                $c['note'] = $crypto->decrypt((string)($c['note'] ?? '')) ?: '';
+            }
+            $children[] = $c;
+        }
+
+        $eventsUpcoming = [];
+        $eventsPast = [];
+        $editEvent = null;
+        $stmt = $pdo?->prepare(
+          'SELECT e.id, e.title, e.teaser_public, e.description, e.location_label, e.street, e.zip, e.city, e.region, e.starts_at, e.allow_kids, e.visibility, e.status, e.lat, e.lng,
+                  (SELECT COUNT(*) FROM event_participants ep WHERE ep.event_id = e.id) AS participant_count
+           FROM events e
+           WHERE e.created_by = :id AND e.starts_at >= NOW()
+           ORDER BY e.starts_at ASC'
+        );
+        $stmt?->execute(['id' => $userId]);
+        $eventsUpcoming = $stmt?->fetchAll(\PDO::FETCH_ASSOC) ?: [];
+
+        $stmt = $pdo?->prepare(
+          'SELECT e.id, e.title, e.teaser_public, e.starts_at, e.city, e.visibility, e.status,
+                  (SELECT COUNT(*) FROM event_participants ep WHERE ep.event_id = e.id) AS participant_count
+           FROM events e
+           WHERE e.created_by = :id AND e.starts_at < NOW()
+           ORDER BY e.starts_at DESC'
+        );
+        $stmt?->execute(['id' => $userId]);
+        $eventsPast = $stmt?->fetchAll(\PDO::FETCH_ASSOC) ?: [];
+
+        if (isset($_GET['edit_event'])) {
+          $editId = (int)$_GET['edit_event'];
+          $stmt = $pdo?->prepare('SELECT * FROM events WHERE id = :id AND created_by = :uid AND starts_at >= NOW() LIMIT 1');
+          $stmt?->execute(['id' => $editId, 'uid' => $userId]);
+          $editEvent = $stmt?->fetch(\PDO::FETCH_ASSOC) ?: null;
+        }
+
+        return compact('flash','info','error','profile','children','eventsUpcoming','eventsPast','editEvent');
+    }
+
+    private static function geocodeAddress(?string $street, ?string $zip, ?string $city, ?string $region): array
+    {
+        $parts = array_filter([
+            $street ?: null,
+            $zip ?: null,
+            $city ?: null,
+            $region ?: null,
+        ]);
+        if (!$parts) {
+            return [null, null, null];
+        }
+
+        $query = implode(', ', $parts);
+        $url = 'https://nominatim.openstreetmap.org/search?' . http_build_query([
+            'format' => 'jsonv2',
+            'limit' => 1,
+            'q' => $query,
+        ]);
+
+        $ctx = stream_context_create([
+            'http' => [
+                'method' => 'GET',
+                'header' => "User-Agent: papa-kind-treff/1.0\r\nAccept-Language: de\r\n",
+                'timeout' => 6,
+            ],
+        ]);
+
+        $resp = @file_get_contents($url, false, $ctx);
+        if ($resp === false) {
+            return [null, null, null];
+        }
+        $json = json_decode($resp, true);
+        if (!is_array($json) || empty($json[0]['lat']) || empty($json[0]['lon'])) {
+            return [null, null, null];
+        }
+        $addr = $json[0]['address'] ?? [];
+        $regionGuess = $addr['city_district'] ?? $addr['suburb'] ?? $addr['state'] ?? $addr['county'] ?? $addr['region'] ?? $addr['state_district'] ?? null;
+        return [round((float)$json[0]['lat'], 7), round((float)$json[0]['lon'], 7), $regionGuess];
+    }
+}
diff --git a/src/App/App.php b/src/App/App.php
index e5553d8..2679583 100644
--- a/src/App/App.php
+++ b/src/App/App.php
@@ -1 +1,50 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class App
+{
+    private static ?self $instance = null;
+
+    private Request $request;
+    private SessionManager $session;
+    private Assets $assets;
+    private I18n $i18n;
+    private Flash $flash;
+    private ?\PDO $pdo;
+
+    private function __construct(private Config $config)
+    {
+        $this->request = new Request();
+        $this->session = new SessionManager($config);
+        $this->assets  = new Assets($config);
+        $this->i18n    = new I18n($config, 'de');
+        $this->flash   = new Flash($this->session);
+        $this->pdo     = Database::createPdo($config);
+    }
+
+    public static function init(Config $config): self
+    {
+        if (self::$instance === null) {
+            self::$instance = new self($config);
+        }
+        return self::$instance;
+    }
+
+    public static function get(): self
+    {
+        if (self::$instance === null) {
+            throw new \RuntimeException('App not initialized. Call App::init() in bootstrap.');
+        }
+        return self::$instance;
+    }
+
+    public function config(): Config { return $this->config; }
+    public function request(): Request { return $this->request; }
+    public function session(): SessionManager { return $this->session; }
+    public function assets(): Assets { return $this->assets; }
+    public function i18n(): I18n { return $this->i18n; }
+    public function flash(): Flash { return $this->flash; }
+    public function pdo(): ?\PDO { return $this->pdo; }
+}
diff --git a/src/App/Assets.php b/src/App/Assets.php
index e5553d8..6bd655b 100644
--- a/src/App/Assets.php
+++ b/src/App/Assets.php
@@ -1 +1,44 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class Assets
+{
+    private array $styles = [];
+    private array $scriptsHeader = [];
+    private array $scriptsFooter = [];
+
+    public function __construct(private Config $config) {}
+
+    public function addStyle(string $href, string $priority = 'normal', ?string $version = null): void
+    {
+        $version ??= $this->config->assetVersion;
+        $this->styles[] = [
+            'href' => $href,
+            'priority' => $priority,
+            'version' => $version,
+        ];
+    }
+
+    public function addScript(string $src, string $pos = 'footer', bool $defer = true, bool $async = false, ?string $version = null): void
+    {
+        $version ??= $this->config->assetVersion;
+        $row = [
+            'src' => $src,
+            'defer' => $defer,
+            'async' => $async,
+            'version' => $version,
+        ];
+
+        if ($pos === 'header') {
+            $this->scriptsHeader[] = $row;
+        } else {
+            $this->scriptsFooter[] = $row;
+        }
+    }
+
+    public function styles(): array { return $this->styles; }
+    public function headerScripts(): array { return $this->scriptsHeader; }
+    public function footerScripts(): array { return $this->scriptsFooter; }
+}
diff --git a/src/App/Auth.php b/src/App/Auth.php
index e5553d8..5af7d63 100644
--- a/src/App/Auth.php
+++ b/src/App/Auth.php
@@ -1 +1,217 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class Auth
+{
+    public function __construct(private App $app) {}
+
+    private function pdo(): \PDO
+    {
+        $pdo = $this->app->pdo();
+        if (!$pdo) {
+            throw new \RuntimeException('Database connection not available.');
+        }
+        return $pdo;
+    }
+
+    public function register(string $displayName, string $email, string $password): int
+    {
+        $pdo = $this->pdo();
+        $email = strtolower(trim($email));
+        $displayName = trim($displayName);
+
+        if ($displayName === '' || $email === '' || $password === '') {
+            throw new \InvalidArgumentException('Display-Name, E-Mail und Passwort sind erforderlich.');
+        }
+
+        $pdo->beginTransaction();
+        try {
+            $stmt = $pdo->prepare('SELECT id FROM users WHERE email = :email LIMIT 1');
+            $stmt->execute(['email' => $email]);
+            if ($stmt->fetchColumn()) {
+                throw new \RuntimeException('E-Mail ist bereits registriert.');
+            }
+
+            $hash = password_hash($password, PASSWORD_ARGON2ID);
+            $stmt = $pdo->prepare('INSERT INTO users (email, password_hash, status, created_at, updated_at) VALUES (:email, :pw, :status, NOW(), NOW())');
+            $stmt->execute([
+                'email' => $email,
+                'pw' => $hash,
+                'status' => 'pending',
+            ]);
+            $userId = (int)$pdo->lastInsertId();
+
+            $stmt = $pdo->prepare('INSERT INTO user_profiles (user_id, display_name, share_level, children_visibility, created_at, updated_at) VALUES (:uid, :name, :share, :childvis, NOW(), NOW())');
+            $stmt->execute([
+                'uid' => $userId,
+                'name' => $displayName,
+                'share' => 'basic',
+                'childvis' => 'hidden',
+            ]);
+
+            $pdo->commit();
+            return $userId;
+        } catch (\Throwable $e) {
+            $pdo->rollBack();
+            throw $e;
+        }
+    }
+
+    public function createVerifyCode(int $userId, string $email): string
+    {
+        $pdo = $this->pdo();
+        $code = $this->generateCode(6);
+        $hash = hash('sha256', $code);
+
+        $pdo->prepare('DELETE FROM user_tokens WHERE user_id = :uid AND type = :t')->execute(['uid' => $userId, 't' => 'verify']);
+        $stmt = $pdo->prepare('INSERT INTO user_tokens (user_id, type, code, token_hash, expires_at, created_at) VALUES (:uid, :type, :code, :hash, DATE_ADD(NOW(), INTERVAL 48 HOUR), NOW())');
+        $stmt->execute([
+            'uid' => $userId,
+            'type' => 'verify',
+            'code' => $code,
+            'hash' => $hash,
+        ]);
+
+        return $code;
+    }
+
+    public function verifyCode(string $email, string $code): int
+    {
+        $pdo = $this->pdo();
+        $email = strtolower(trim($email));
+        $hash = hash('sha256', $code);
+
+        $stmt = $pdo->prepare('SELECT u.id, u.status, t.id AS tid, t.token_hash FROM users u JOIN user_tokens t ON t.user_id = u.id AND t.type = :type WHERE u.email = :email AND (t.used_at IS NULL) AND t.expires_at > NOW() ORDER BY t.expires_at DESC LIMIT 1');
+        $stmt->execute(['type' => 'verify', 'email' => $email]);
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+        if (!$row || !hash_equals((string)$row['token_hash'], $hash)) {
+            throw new \RuntimeException('Code ist ungültig oder abgelaufen.');
+        }
+
+        $userId = (int)$row['id'];
+        $tid = (int)$row['tid'];
+
+        $pdo->beginTransaction();
+        try {
+            $pdo->prepare('UPDATE user_tokens SET used_at = NOW() WHERE id = :id')->execute(['id' => $tid]);
+            $pdo->prepare('UPDATE users SET status = :st, email_verified_at = NOW() WHERE id = :id')->execute(['st' => 'active', 'id' => $userId]);
+            $pdo->commit();
+        } catch (\Throwable $e) {
+            $pdo->rollBack();
+            throw $e;
+        }
+
+        return $userId;
+    }
+
+    public function createResetCode(string $email): array
+    {
+        $pdo = $this->pdo();
+        $email = strtolower(trim($email));
+
+        $stmt = $pdo->prepare('SELECT u.id, p.display_name FROM users u LEFT JOIN user_profiles p ON p.user_id = u.id WHERE u.email = :email LIMIT 1');
+        $stmt->execute(['email' => $email]);
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+        if (!$row) {
+            throw new \RuntimeException('E-Mail ist nicht registriert.');
+        }
+
+        $userId = (int)$row['id'];
+        $displayName = (string)($row['display_name'] ?? $email);
+        $code = $this->generateCode(6);
+        $hash = hash('sha256', $code);
+
+        $pdo->prepare('DELETE FROM user_tokens WHERE user_id = :uid AND type = :t')->execute(['uid' => $userId, 't' => 'reset']);
+        $stmt = $pdo->prepare('INSERT INTO user_tokens (user_id, type, code, token_hash, expires_at, created_at) VALUES (:uid, :type, :code, :hash, DATE_ADD(NOW(), INTERVAL 2 HOUR), NOW())');
+        $stmt->execute([
+            'uid' => $userId,
+            'type' => 'reset',
+            'code' => $code,
+            'hash' => $hash,
+        ]);
+
+        return ['user_id' => $userId, 'code' => $code, 'display_name' => $displayName];
+    }
+
+    public function verifyResetCode(string $email, string $code): int
+    {
+        $pdo = $this->pdo();
+        $email = strtolower(trim($email));
+        $hash = hash('sha256', $code);
+
+        $stmt = $pdo->prepare('SELECT u.id, t.id AS tid, t.token_hash FROM users u JOIN user_tokens t ON t.user_id = u.id AND t.type = :type WHERE u.email = :email AND (t.used_at IS NULL) AND t.expires_at > NOW() ORDER BY t.expires_at DESC LIMIT 1');
+        $stmt->execute(['type' => 'reset', 'email' => $email]);
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+        if (!$row || !hash_equals((string)$row['token_hash'], $hash)) {
+            throw new \RuntimeException('Code ist ungültig oder abgelaufen.');
+        }
+
+        $userId = (int)$row['id'];
+        $tid = (int)$row['tid'];
+
+        $pdo->beginTransaction();
+        try {
+            $pdo->prepare('UPDATE user_tokens SET used_at = NOW() WHERE id = :id')->execute(['id' => $tid]);
+            $pdo->commit();
+        } catch (\Throwable $e) {
+            $pdo->rollBack();
+            throw $e;
+        }
+
+        return $userId;
+    }
+
+    public function resetPassword(int $userId, string $password): void
+    {
+        $pdo = $this->pdo();
+        if ($password === '' || strlen($password) < 8) {
+            throw new \InvalidArgumentException('Passwort muss mindestens 8 Zeichen haben.');
+        }
+        $hash = password_hash($password, PASSWORD_ARGON2ID);
+        $stmt = $pdo->prepare('UPDATE users SET password_hash = :pw, status = :status, updated_at = NOW() WHERE id = :id');
+        $stmt->execute([
+            'pw' => $hash,
+            'status' => 'active',
+            'id' => $userId,
+        ]);
+    }
+
+    private function generateCode(int $len = 6): string
+    {
+        $chars = 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789';
+        $out = '';
+        for ($i = 0; $i < $len; $i++) {
+            $out .= $chars[random_int(0, strlen($chars) - 1)];
+        }
+        return $out;
+    }
+
+    public function login(string $email, string $password): array
+    {
+        $pdo = $this->pdo();
+        $email = strtolower(trim($email));
+
+        $stmt = $pdo->prepare('SELECT id, password_hash, status FROM users WHERE email = :email LIMIT 1');
+        $stmt->execute(['email' => $email]);
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+
+        if (!$row) {
+            throw new \RuntimeException('E-Mail oder Passwort ist falsch.');
+        }
+        if (!password_verify($password, (string)$row['password_hash'])) {
+            throw new \RuntimeException('E-Mail oder Passwort ist falsch.');
+        }
+
+        $userId = (int)$row['id'];
+        $status = (string)$row['status'];
+
+        if ($status === 'active') {
+            $upd = $pdo->prepare('UPDATE users SET last_login_at = NOW() WHERE id = :id');
+            $upd->execute(['id' => $userId]);
+        }
+
+        return ['id' => $userId, 'status' => $status];
+    }
+}
diff --git a/src/App/Community.php b/src/App/Community.php
index e5553d8..38661fe 100644
--- a/src/App/Community.php
+++ b/src/App/Community.php
@@ -1 +1,196 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class Community
+{
+    public function __construct(private \PDO $pdo, private array $config)
+    {
+    }
+
+    public function createThread(int $userId, string $title, string $body): void
+    {
+        $stmt = $this->pdo->prepare('INSERT INTO forum_threads (user_id, title, body) VALUES (:uid, :title, :body)');
+        $stmt->execute([
+            ':uid' => $userId,
+            ':title' => trim($title),
+            ':body' => trim($body),
+        ]);
+    }
+
+    public function createPost(int $userId, int $threadId, string $body): void
+    {
+        $stmt = $this->pdo->prepare('INSERT INTO forum_posts (thread_id, user_id, body) VALUES (:tid, :uid, :body)');
+        $stmt->execute([
+            ':tid' => $threadId,
+            ':uid' => $userId,
+            ':body' => trim($body),
+        ]);
+    }
+
+    public function searchThreads(string $query, int $limit = 50): array
+    {
+        $conditions = [];
+        $params = [];
+        $tokens = array_filter(preg_split('/\s+/', trim($query)) ?: [], fn($t) => $t !== '');
+        $i = 0;
+        foreach ($tokens as $tok) {
+            $ph1 = ':t' . $i . 'a';
+            $ph2 = ':t' . $i . 'b';
+            $conditions[] = "(ft.title LIKE $ph1 OR ft.body LIKE $ph2)";
+            $params[$ph1] = '%' . $tok . '%';
+            $params[$ph2] = '%' . $tok . '%';
+            $i++;
+        }
+        $where = $conditions ? ('AND ' . implode(' AND ', $conditions)) : '';
+
+        $sql = "SELECT ft.id, ft.title, ft.body, ft.created_at,
+                       u.id as uid, u.created_at as user_created,
+                       p.display_name,
+                       (SELECT COUNT(*) FROM forum_posts fp WHERE fp.thread_id = ft.id) AS answers,
+                       (SELECT COUNT(*) FROM forum_posts fp2 WHERE fp2.user_id = u.id) +
+                       (SELECT COUNT(*) FROM forum_threads ft2 WHERE ft2.user_id = u.id) AS user_posts
+                FROM forum_threads ft
+                JOIN users u ON u.id = ft.user_id
+                LEFT JOIN user_profiles p ON p.user_id = u.id
+                WHERE 1=1 $where
+                ORDER BY ft.created_at DESC
+                LIMIT :lim";
+        $stmt = $this->pdo->prepare($sql);
+        foreach ($params as $k => $v) {
+            $stmt->bindValue($k, $v, \PDO::PARAM_STR);
+        }
+        $stmt->bindValue(':lim', $limit, \PDO::PARAM_INT);
+        $stmt->execute();
+        return $stmt->fetchAll(\PDO::FETCH_ASSOC) ?: [];
+    }
+
+    public function listThreads(int $limit = 50): array
+    {
+        return $this->searchThreads('', $limit);
+    }
+
+    public function getThread(int $id): ?array
+    {
+        $stmt = $this->pdo->prepare('SELECT ft.*, p.display_name FROM forum_threads ft LEFT JOIN user_profiles p ON p.user_id = ft.user_id WHERE ft.id = :id');
+        $stmt->execute([':id' => $id]);
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+        return $row ?: null;
+    }
+
+    public function listPosts(int $threadId): array
+    {
+        $stmt = $this->pdo->prepare('SELECT fp.*, p.display_name FROM forum_posts fp LEFT JOIN user_profiles p ON p.user_id = fp.user_id WHERE fp.thread_id = :id ORDER BY fp.created_at ASC');
+        $stmt->execute([':id' => $threadId]);
+        return $stmt->fetchAll(\PDO::FETCH_ASSOC) ?: [];
+    }
+
+    public function computePoints(int $userId): float
+    {
+        // Primär: aggregierte Werte aus user_points_totals, Fallback: Summe aus user_points
+        $stmt = $this->pdo->prepare('SELECT total FROM user_points_totals WHERE user_id = :uid');
+        $stmt->execute([':uid' => $userId]);
+        $total = $stmt->fetchColumn();
+        if ($total !== false && $total !== null) {
+            return (float)$total;
+        }
+
+        $stmt = $this->pdo->prepare('SELECT COALESCE(SUM(amount),0) FROM user_points WHERE user_id = :uid');
+        $stmt->execute([':uid' => $userId]);
+        return (float)$stmt->fetchColumn();
+    }
+
+    /**
+     * Vergibt Punkte persistent und berücksichtigt Caps/Bonis gemäß config actions.
+     */
+    public function addPoints(int $userId, string $group, string $key, array $meta = []): float
+    {
+        $actions = $this->config['actions'][$group][$key] ?? null;
+        if (!$actions || empty($actions['points'])) {
+            return 0.0;
+        }
+        $basePoints = (float)$actions['points'];
+
+        // Boni (einfacher first-Check)
+        $bonusPoints = 0.0;
+        if (!empty($actions['bonuses'])) {
+            if (isset($actions['bonuses']['first'])) {
+                $bonusPoints += (float)$actions['bonuses']['first'];
+            }
+            if (isset($actions['bonuses']['first_helpful_5']) && isset($meta['helpful_count']) && (int)$meta['helpful_count'] >= 5) {
+                $bonusPoints += (float)$actions['bonuses']['first_helpful_5'];
+            }
+        }
+
+        $amount = $basePoints + $bonusPoints;
+        if ($amount <= 0) {
+            return 0.0;
+        }
+
+        $caps = $actions['caps'] ?? [];
+        $capDaily = $caps['daily'] ?? null;
+        $capTotal = $caps['total'] ?? null;
+
+        $todayStart = (new \DateTimeImmutable('today'))->format('Y-m-d 00:00:00');
+        $todayEnd   = (new \DateTimeImmutable('today'))->format('Y-m-d 23:59:59');
+
+        $actionKey = $group . '.' . $key;
+
+        if ($capDaily !== null) {
+            $stmt = $this->pdo->prepare("SELECT COALESCE(SUM(amount),0) FROM user_points WHERE user_id = :uid AND action = :action AND created_at BETWEEN :s AND :e");
+            $stmt->execute([
+                ':uid' => $userId,
+                ':action' => $actionKey,
+                ':s' => $todayStart,
+                ':e' => $todayEnd,
+            ]);
+            $usedToday = (float)$stmt->fetchColumn();
+            $remaining = max(0.0, (float)$capDaily - $usedToday);
+            if ($remaining <= 0) {
+                return 0.0;
+            }
+            $amount = min($amount, $remaining);
+        }
+
+        if ($capTotal !== null) {
+            $stmt = $this->pdo->prepare("SELECT COALESCE(SUM(amount),0) FROM user_points WHERE user_id = :uid AND action = :action");
+            $stmt->execute([':uid' => $userId, ':action' => $actionKey]);
+            $usedTotal = (float)$stmt->fetchColumn();
+            $remaining = max(0.0, (float)$capTotal - $usedTotal);
+            if ($remaining <= 0) {
+                return 0.0;
+            }
+            $amount = min($amount, $remaining);
+        }
+
+        $stmt = $this->pdo->prepare('INSERT INTO user_points (user_id, action, amount, meta) VALUES (:uid, :action, :amount, :meta)');
+        $stmt->execute([
+            ':uid' => $userId,
+            ':action' => $actionKey,
+            ':amount' => $amount,
+            ':meta' => $meta ? json_encode($meta) : null,
+        ]);
+
+        $stmt = $this->pdo->prepare('INSERT INTO user_points_totals (user_id, total) VALUES (:uid, :amt) ON DUPLICATE KEY UPDATE total = total + VALUES(total)');
+        $stmt->execute([':uid' => $userId, ':amt' => $amount]);
+
+        return $amount;
+    }
+
+    public function membershipLevel(float $points): array
+    {
+        $levels = $this->config['levels'] ?? [];
+        usort($levels, fn($a,$b) => ($b['min'] ?? 0) <=> ($a['min'] ?? 0));
+        foreach ($levels as $lvl) {
+            if ($points >= (float)($lvl['min'] ?? 0)) {
+                return [
+                    'label' => $lvl['label'] ?? 'New Daddy',
+                    'icon' => $lvl['icon'] ?? '',
+                ];
+            }
+        }
+        $fallback = $levels ? $levels[count($levels)-1] : ['label' => 'New Daddy','icon' => ''];
+        return ['label' => $fallback['label'], 'icon' => $fallback['icon'] ?? ''];
+    }
+}
diff --git a/src/App/Config.php b/src/App/Config.php
index e5553d8..4f02ea5 100644
--- a/src/App/Config.php
+++ b/src/App/Config.php
@@ -1 +1,62 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class Config
+{
+    public function __construct(
+        public readonly string $env,
+        public readonly string $prefix,
+        public readonly string $primaryDomain,
+        public readonly string $primaryUrl,
+        public readonly string $apiBase,
+        public readonly string $assetVersion,
+        public readonly bool   $dbEnabled,
+        public readonly array  $db,
+    ) {}
+
+    public static function fromPhpConstants(string $configDir): self
+    {
+        // config.php defines these constants.
+        $env          = defined('APP_ENV') ? (string) APP_ENV : 'prod';
+        $prefix       = defined('APP_PREFIX') ? (string) APP_PREFIX : 'app';
+        $primaryDom   = defined('APP_DOMAIN_PRIMARY') ? (string) APP_DOMAIN_PRIMARY : 'example.test';
+        $primaryUrl   = defined('APP_URL_PRIMARY') ? (string) APP_URL_PRIMARY : 'https://example.test';
+        $apiBase      = defined('APP_API_BASE') ? (string) APP_API_BASE : ($primaryUrl . '/api');
+        $assetVersion = defined('ASSET_VERSION') ? (string) ASSET_VERSION : '';
+
+        $dbEnabled    = defined('APP_DB_ENABLED') ? (bool) APP_DB_ENABLED : false;
+
+        $dbFileRoot = rtrim($configDir, '/\\') . DIRECTORY_SEPARATOR . 'db.php';
+        $dbFileEnv  = rtrim($configDir, '/\\') . DIRECTORY_SEPARATOR . $env . DIRECTORY_SEPARATOR . 'db.php';
+        $dbFile     = file_exists($dbFileRoot) ? $dbFileRoot : (file_exists($dbFileEnv) ? $dbFileEnv : null);
+        $db         = $dbFile ? (array) require $dbFile : [];
+
+        return new self(
+            env: $env,
+            prefix: $prefix,
+            primaryDomain: $primaryDom,
+            primaryUrl: rtrim($primaryUrl, '/'),
+            apiBase: rtrim($apiBase, '/'),
+            assetVersion: $assetVersion,
+            dbEnabled: $dbEnabled,
+            db: $db
+        );
+    }
+
+    public function cookiePrefix(): string
+    {
+        // Example: add suffix for staging
+        if ($this->env === 'staging') {
+            return $this->prefix . '_stg_';
+        }
+        return $this->prefix . '_';
+    }
+
+    public function cookieDomain(): string
+    {
+        // Leading dot for subdomain-wide cookies
+        return '.' . ltrim($this->primaryDomain, '.');
+    }
+}
diff --git a/src/App/Crypto.php b/src/App/Crypto.php
index e5553d8..c5d9dfa 100644
--- a/src/App/Crypto.php
+++ b/src/App/Crypto.php
@@ -1 +1,68 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class Crypto
+{
+    private string $key;
+
+    public function __construct(Config $config)
+    {
+        if (!extension_loaded('sodium')) {
+            throw new \RuntimeException('libsodium extension not available');
+        }
+
+        $raw = getenv('DATA_KEY') ?: '';
+        $raw = trim($raw);
+        if ($raw === '') {
+            throw new \RuntimeException('DATA_KEY env not set');
+        }
+
+        // base64?
+        if (str_starts_with($raw, 'base64:')) {
+            $raw = substr($raw, 7);
+        }
+        $decoded = base64_decode($raw, true);
+        if ($decoded !== false && strlen($decoded) >= SODIUM_CRYPTO_AEAD_XCHACHA20POLY1305_IETF_KEYBYTES) {
+            $raw = $decoded;
+        } elseif (ctype_xdigit($raw) && strlen($raw) >= SODIUM_CRYPTO_AEAD_XCHACHA20POLY1305_IETF_KEYBYTES * 2) {
+            $raw = hex2bin($raw);
+        }
+
+        if (strlen($raw) < SODIUM_CRYPTO_AEAD_XCHACHA20POLY1305_IETF_KEYBYTES) {
+            throw new \RuntimeException('DATA_KEY invalid length');
+        }
+
+        $this->key = substr($raw, 0, SODIUM_CRYPTO_AEAD_XCHACHA20POLY1305_IETF_KEYBYTES);
+    }
+
+    public function encrypt(string $plaintext): string
+    {
+        if ($plaintext === '') {
+            return '';
+        }
+        $nonce = random_bytes(SODIUM_CRYPTO_AEAD_XCHACHA20POLY1305_IETF_NPUBBYTES);
+        $cipher = sodium_crypto_aead_xchacha20poly1305_ietf_encrypt($plaintext, '', $nonce, $this->key);
+        return base64_encode($nonce . $cipher);
+    }
+
+    public function decrypt(?string $blob): string
+    {
+        if ($blob === null || $blob === '') {
+            return '';
+        }
+        $raw = base64_decode($blob, true);
+        if ($raw === false || strlen($raw) <= SODIUM_CRYPTO_AEAD_XCHACHA20POLY1305_IETF_NPUBBYTES) {
+            return '';
+        }
+        $nonce = substr($raw, 0, SODIUM_CRYPTO_AEAD_XCHACHA20POLY1305_IETF_NPUBBYTES);
+        $cipher = substr($raw, SODIUM_CRYPTO_AEAD_XCHACHA20POLY1305_IETF_NPUBBYTES);
+        try {
+            $plain = sodium_crypto_aead_xchacha20poly1305_ietf_decrypt($cipher, '', $nonce, $this->key);
+            return $plain === false ? '' : $plain;
+        } catch (\Throwable) {
+            return '';
+        }
+    }
+}
diff --git a/src/App/Database.php b/src/App/Database.php
index e5553d8..27f9071 100644
--- a/src/App/Database.php
+++ b/src/App/Database.php
@@ -1 +1,123 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class Database
+{
+    public static function createPdo(Config $config): ?\PDO
+    {
+        if (!$config->dbEnabled) {
+            return null;
+        }
+
+        $db = $config->db;
+        $driver = (string)($db['driver'] ?? '');
+
+        if ($driver === '') {
+            throw new \RuntimeException('DB enabled but config/db.php missing "driver"');
+        }
+
+        $dsn = match ($driver) {
+            'mysql'  => self::buildMysqlDsn($db),
+            'pgsql'  => self::buildPgsqlDsn($db),
+            'sqlite' => self::buildSqliteDsn($db),
+            default  => throw new \RuntimeException('Unsupported PDO driver: ' . $driver),
+        };
+
+        try {
+            $pdo = new \PDO(
+                $dsn,
+                // sqlite braucht user/pass nicht, PDO ignoriert es aber; wir geben leer zurück
+                (string)($db['user'] ?? ''),
+                (string)($db['password'] ?? ''),
+                (array)($db['options'] ?? [])
+            );
+
+            // Optional: PostgreSQL schema/search_path setzen
+            if ($driver === 'pgsql' && !empty($db['schema'])) {
+                // Minimaler Schutz gegen Injection über schema
+                $schema = preg_replace('/[^a-zA-Z0-9_]/', '', (string)$db['schema']);
+                if ($schema !== '') {
+                    $pdo->exec('SET search_path TO ' . $schema);
+                }
+            }
+
+            return $pdo;
+        } catch (\PDOException $e) {
+            // In Prod würdest du loggen; hier minimal
+            http_response_code(500);
+            echo 'Database connection error.';
+            exit;
+        }
+    }
+
+    private static function buildMysqlDsn(array $db): string
+    {
+        if (empty($db['dbname'])) {
+            throw new \RuntimeException('MySQL config missing "dbname"');
+        }
+
+        $charset = (string)($db['charset'] ?? 'utf8mb4');
+
+        // Unix socket takes precedence
+        if (!empty($db['unix_socket'])) {
+            return sprintf(
+                'mysql:unix_socket=%s;dbname=%s;charset=%s',
+                (string)$db['unix_socket'],
+                (string)$db['dbname'],
+                $charset
+            );
+        }
+
+        $host = (string)($db['host'] ?? 'localhost');
+        $port = (int)($db['port'] ?? 3306);
+
+        return sprintf(
+            'mysql:host=%s;port=%d;dbname=%s;charset=%s',
+            $host,
+            $port,
+            (string)$db['dbname'],
+            $charset
+        );
+    }
+
+    private static function buildPgsqlDsn(array $db): string
+    {
+        if (empty($db['dbname'])) {
+            throw new \RuntimeException('PostgreSQL config missing "dbname"');
+        }
+
+        $host = (string)($db['host'] ?? 'localhost');
+        $port = (int)($db['port'] ?? 5432);
+
+        // Hinweis: charset gehört bei pgsql nicht in den DSN
+        return sprintf(
+            'pgsql:host=%s;port=%d;dbname=%s',
+            $host,
+            $port,
+            (string)$db['dbname']
+        );
+    }
+
+    private static function buildSqliteDsn(array $db): string
+    {
+        // SQLite kann :memory: oder einen Pfad nutzen
+        $path = (string)($db['path'] ?? '');
+
+        if ($path === '') {
+            // Default: Memory-DB
+            $path = ':memory:';
+        }
+
+        // Wenn es ein Pfad ist, stelle sicher, dass das Verzeichnis existiert.
+        if ($path !== ':memory:') {
+            $dir = \dirname($path);
+            if ($dir && !is_dir($dir)) {
+                @mkdir($dir, 0775, true);
+            }
+        }
+
+        return 'sqlite:' . $path;
+    }
+}
diff --git a/src/App/Flash.php b/src/App/Flash.php
index e5553d8..39efc44 100644
--- a/src/App/Flash.php
+++ b/src/App/Flash.php
@@ -1 +1,33 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class Flash
+{
+    public function __construct(private SessionManager $session) {}
+
+    public function set(string $type, string $message): void
+    {
+        $this->session->start();
+        $_SESSION['flash'] = [
+            'type' => $type,
+            'message' => $message,
+        ];
+    }
+
+    public function get(): ?array
+    {
+        $this->session->start();
+        if (empty($_SESSION['flash']) || !is_array($_SESSION['flash'])) {
+            return null;
+        }
+        $f = $_SESSION['flash'];
+        unset($_SESSION['flash']);
+
+        return [
+            'type' => (string)($f['type'] ?? 'info'),
+            'message' => (string)($f['message'] ?? ''),
+        ];
+    }
+}
diff --git a/src/App/I18n.php b/src/App/I18n.php
index e5553d8..4a34f6e 100644
--- a/src/App/I18n.php
+++ b/src/App/I18n.php
@@ -1 +1,59 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class I18n
+{
+    private array $current = [];
+    private array $fallback = [];
+
+    public function __construct(private Config $config, private string $lang = 'en')
+    {
+        // Minimal example translations (normally load JSON/PHP arrays from disk)
+        $this->fallback = [
+            'common' => [
+                'title' => '3D-Druck Materialmatrix',
+                'intro' => 'Schnell prüfen, welche Filamente auf welchen Druckern laufen.',
+            ],
+            'cta' => [
+                'primary' => 'Weiter',
+            ],
+        ];
+
+        $this->current = $this->fallback;
+    }
+
+    private function traverse(array $data, string $key): mixed
+    {
+        $node = $data;
+        foreach (explode('.', $key) as $seg) {
+            if (!is_array($node) || !array_key_exists($seg, $node)) {
+                return null;
+            }
+            $node = $node[$seg];
+        }
+        return $node;
+    }
+
+    public function get(string $key, $default = '', array $vars = []): string
+    {
+        $val = $this->traverse($this->current, $key);
+        if ($val === null) {
+            $val = $this->traverse($this->fallback, $key);
+        }
+        if (!is_string($val)) {
+            $val = (string)($default ?? '');
+        }
+
+        // Built-ins
+        $val = str_replace('{year}', date('Y'), $val);
+        $val = str_replace('{{primary_url}}', $this->config->primaryUrl, $val);
+
+        foreach ($vars as $k => $v) {
+            $val = str_replace('{' . $k . '}', (string)$v, $val);
+            $val = str_replace('{{' . $k . '}}', (string)$v, $val);
+        }
+        return $val;
+    }
+}
diff --git a/src/App/Mailer.php b/src/App/Mailer.php
index e5553d8..a150e4e 100644
--- a/src/App/Mailer.php
+++ b/src/App/Mailer.php
@@ -1 +1,352 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class Mailer
+{
+    private string $logFile;
+    private bool $logCleared = false;
+
+    public function __construct(private App $app)
+    {
+        $base = dirname(__DIR__, 2);
+        $this->logFile = $base . '/debug/mailer_debug.log';
+    }
+
+    private function log(string $msg, array $ctx = []): void
+    {
+        if (!defined('APP_DEBUG') || APP_DEBUG !== true) {
+            return;
+        }
+        $line = '[' . date('Y-m-d H:i:s') . '] ' . $msg;
+        if ($ctx) {
+            $line .= ' ' . json_encode($ctx, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
+        }
+        $line .= "\n";
+        $dir = dirname($this->logFile);
+        if (!is_dir($dir)) {
+            @mkdir($dir, 0775, true);
+        }
+        // For clarity keep only the latest run in the log: truncate once per request
+        if ($this->logCleared === false) {
+            @file_put_contents($this->logFile, '');
+            $this->logCleared = true;
+        }
+        @file_put_contents($this->logFile, $line, FILE_APPEND);
+    }
+
+    private function templates(): array
+    {
+        $env = $this->app->config()->env;
+        $root = __DIR__ . '/../../config/emailtemplates.php';
+        $envPath = __DIR__ . "/../../config/{$env}/emailtemplates.php";
+        $file = is_file($root) ? $root : $envPath;
+        $emailtemplates = [];
+        if (is_file($file)) {
+            /** @noinspection PhpIncludeInspection */
+            include $file; // populates $emailtemplates variable from included file
+        }
+        return is_array($emailtemplates ?? null) ? $emailtemplates : [];
+    }
+
+    private function renderTemplate(string $key, array $vars): array
+    {
+        $templates = $this->templates();
+        $id = $templates[$key] ?? $key;
+        $this->log('template_resolved_id', ['key' => $key, 'id' => $id]);
+
+        $apiBase  = getenv('EMAILTEMPLATE_API_BASE') ?: '';
+        $apiToken = getenv('EMAILTEMPLATE_API_TOKEN') ?: '';
+
+        if ($apiBase && $apiToken) {
+        $payload = [
+            'template' => $id,
+            'placeholders' => $vars,
+        ];
+            $payload['token'] = $apiToken;
+
+            $payloadForLog = $payload;
+            $payloadForLog['token'] = '[hidden length ' . strlen((string)$apiToken) . ']';
+            $this->log('template_api_request_payload', [
+                'url' => $apiBase,
+                'payload' => $payloadForLog,
+            ]);
+
+            $this->log('template_api_request', ['template' => $id, 'placeholders' => array_keys($vars)]);
+            $ctx = stream_context_create([
+                'http' => [
+                    'method' => 'POST',
+                    'header' => "Content-Type: application/json\r\n",
+                    'timeout' => 15,
+                    'content' => json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES),
+                ],
+            ]);
+            $resp = @file_get_contents($apiBase, false, $ctx);
+            if ($resp !== false) {
+                $status = null;
+                if (isset($http_response_header) && is_array($http_response_header)) {
+                    foreach ($http_response_header as $hdr) {
+                        if (preg_match('~^HTTP/\\S+\\s+(\\d+)~i', $hdr, $m)) {
+                            $status = (int)$m[1];
+                            break;
+                        }
+                    }
+                }
+                $this->log('template_api_response_raw', [
+                    'status' => $status,
+                    'body'   => $resp,
+                ]);
+                $decoded = json_decode($resp, true);
+                if (is_array($decoded) && !empty($decoded['ok']) && !empty($decoded['html'])) {
+                    $this->log('template_api_success', ['template' => $id, 'subject' => $decoded['subject'] ?? null, 'html_len' => strlen((string)$decoded['html'])]);
+                    return [
+                        'id' => $id,
+                        'subject' => $decoded['subject'] ?? '3D-Druck Materialmatrix',
+                        'html' => $decoded['html'],
+                    ];
+                }
+                $this->log('template_api_response_invalid', ['template' => $id, 'response' => $decoded]);
+            } else {
+                $this->log('template_api_unreachable', ['template' => $id]);
+            }
+        }
+
+        // Fallback: einfacher Text
+        $subject = '3D-Druck Materialmatrix';
+        $body = $id;
+        foreach ($vars as $k => $v) {
+            $body = str_replace(['{' . $k . '}', '{{' . $k . '}}'], (string)$v, $body);
+        }
+        $this->log('template_fallback_used', ['template' => $id]);
+        return [
+            'id' => $id,
+            'subject' => $subject,
+            'html' => nl2br(htmlspecialchars($body, ENT_QUOTES)),
+        ];
+    }
+
+    public function sendTemplate(string $templateKey, string $to, array $vars = []): void
+    {
+        if (!filter_var($to, FILTER_VALIDATE_EMAIL)) {
+            throw new \InvalidArgumentException('Invalid recipient email.');
+        }
+
+        $tpl = $this->renderTemplate($templateKey, $vars);
+        $resolvedId = $tpl['id'] ?? $templateKey;
+        $subject = $tpl['subject'] ?? '3D-Druck Materialmatrix';
+        $html = $tpl['html'] ?? '';
+
+        $this->log('mail_rendered_template', [
+            'template_key' => $templateKey,
+            'template_id'  => $resolvedId,
+            'subject'      => $subject,
+            'html_len'     => strlen((string)$html),
+            'html_preview' => substr((string)$html, 0, 200),
+        ]);
+
+        $transport = getenv('MAIL_TRANSPORT') ?: 'mail';
+        $fromEmail = getenv('MAIL_FROM') ?: 'no-reply@' . $this->app->config()->primaryDomain;
+        $fromName  = getenv('MAIL_FROM_NAME') ?: '3D-Druck Materialmatrix';
+
+        $this->log('mail_send_start', [
+            'template_key' => $templateKey,
+            'template_id'  => $resolvedId,
+            'to' => $to,
+            'transport' => $transport,
+            'subject' => $subject
+        ]);
+        if ($transport === 'smtp') {
+            $this->sendSmtp($to, $subject, $html, $fromEmail, $fromName);
+        } else {
+            $this->sendMailFn($to, $subject, $html, $fromEmail, $fromName);
+        }
+    }
+
+    private function sendMailFn(string $to, string $subject, string $html, string $from, string $fromName): void
+    {
+        $headers = [];
+        if ($from) {
+            $headers[] = 'From: ' . sprintf('"%s" <%s>', addslashes($fromName), $from);
+        }
+        $headers[] = 'Content-Type: text/html; charset=utf-8';
+        $ok = @mail($to, $subject, $html, implode("\r\n", $headers));
+        $this->log('mail_mail_transport', ['to' => $to, 'ok' => $ok]);
+        if (!$ok) {
+            throw new \RuntimeException('mail() transport failed');
+        }
+    }
+
+    private function sendSmtp(string $to, string $subject, string $html, string $from, string $fromName): void
+    {
+        $host = getenv('SMTP_HOST') ?: '';
+        $port = (int)(getenv('SMTP_PORT') ?: 587);
+        $user = getenv('SMTP_USER') ?: '';
+        $pass = getenv('SMTP_PASS') ?: '';
+        $secure = strtolower(getenv('SMTP_SECURE') ?: 'tls'); // tls|ssl|none
+
+        if (!$host) {
+            $this->log('mail_smtp_missing_host_fallback_mail', []);
+            $this->sendMailFn($to, $subject, $html, $from, $fromName);
+            return;
+        }
+
+        $proto = ($secure === 'ssl') ? 'ssl://' : '';
+        $fp = @stream_socket_client($proto . $host . ':' . $port, $errno, $errstr, 15, STREAM_CLIENT_CONNECT);
+        if (!$fp) {
+            $this->log('mail_smtp_connect_failed', ['host' => $host, 'port' => $port, 'error' => $errstr]);
+            $this->sendMailFn($to, $subject, $html, $from, $fromName);
+            return;
+        }
+        stream_set_timeout($fp, 15);
+
+        $transcript = [];
+        $readResponse = function (array $expectCodes = [], string $label = 'read') use ($fp, &$transcript): array {
+            $lines = [];
+            while (($line = fgets($fp, 515)) !== false) {
+                $line = rtrim($line, "\r\n");
+                $lines[] = $line;
+                $transcript[] = $label . ': ' . $line;
+                // SMTP multiline: code + '-' means more lines, code + ' ' means end
+                if (strlen($line) >= 4 && $line[3] === ' ') {
+                    break;
+                }
+            }
+            $code = 0;
+            if ($lines) {
+                $code = (int)substr($lines[0], 0, 3);
+            }
+            return [
+                'ok'    => !$expectCodes || in_array($code, $expectCodes, true),
+                'code'  => $code,
+                'lines' => $lines,
+            ];
+        };
+        $write = function (string $cmd, string $label = 'write', bool $mask = false) use ($fp, &$transcript): void {
+            $transcript[] = $label . ': ' . ($mask ? '[omitted]' : $cmd);
+            fwrite($fp, $cmd . "\r\n");
+        };
+
+        $resp = $readResponse([220], 'greeting');
+        if (!$resp['ok']) {
+            fclose($fp);
+            $this->log('mail_smtp_greeting_failed', ['host' => $host, 'port' => $port, 'resp' => $resp]);
+            $this->log('mail_smtp_transcript', ['host' => $host, 'port' => $port, 'secure' => $secure, 'steps' => $transcript]);
+            $this->sendMailFn($to, $subject, $html, $from, $fromName);
+            return;
+        }
+
+        $write('EHLO ' . $this->app->config()->primaryDomain);
+        $resp = $readResponse([250], 'ehlo');
+        if (!$resp['ok']) {
+            fclose($fp);
+            $this->log('mail_smtp_ehlo_failed', ['host' => $host, 'port' => $port, 'resp' => $resp]);
+            $this->log('mail_smtp_transcript', ['host' => $host, 'port' => $port, 'secure' => $secure, 'steps' => $transcript]);
+            $this->sendMailFn($to, $subject, $html, $from, $fromName);
+            return;
+        }
+
+        if ($secure === 'tls') {
+            $write('STARTTLS');
+            $resp = $readResponse([220], 'starttls');
+            if (!$resp['ok'] || !stream_socket_enable_crypto($fp, true, STREAM_CRYPTO_METHOD_TLS_CLIENT)) {
+                fclose($fp);
+                $this->log('mail_smtp_starttls_failed', ['host' => $host, 'port' => $port, 'resp' => $resp]);
+                $this->log('mail_smtp_transcript', ['host' => $host, 'port' => $port, 'secure' => $secure, 'steps' => $transcript]);
+                $this->sendMailFn($to, $subject, $html, $from, $fromName);
+                return;
+            }
+            $write('EHLO ' . $this->app->config()->primaryDomain);
+            $resp = $readResponse([250], 'ehlo-tls');
+            if (!$resp['ok']) {
+                fclose($fp);
+                $this->log('mail_smtp_ehlo_tls_failed', ['host' => $host, 'port' => $port, 'resp' => $resp]);
+                $this->log('mail_smtp_transcript', ['host' => $host, 'port' => $port, 'secure' => $secure, 'steps' => $transcript]);
+                $this->sendMailFn($to, $subject, $html, $from, $fromName);
+                return;
+            }
+        }
+
+        if ($user !== '') {
+            $write('AUTH LOGIN');
+            $resp = $readResponse([334], 'auth-login');
+            if (!$resp['ok']) {
+                fclose($fp);
+                $this->log('mail_smtp_auth_login_failed', ['host' => $host, 'port' => $port, 'resp' => $resp]);
+                $this->log('mail_smtp_transcript', ['host' => $host, 'port' => $port, 'secure' => $secure, 'steps' => $transcript]);
+                $this->sendMailFn($to, $subject, $html, $from, $fromName);
+                return;
+            }
+            $write(base64_encode($user), 'auth-user', true);
+            $resp = $readResponse([334], 'auth-user');
+            if (!$resp['ok']) {
+                fclose($fp);
+                $this->log('mail_smtp_auth_user_failed', ['host' => $host, 'port' => $port, 'resp' => $resp]);
+                $this->log('mail_smtp_transcript', ['host' => $host, 'port' => $port, 'secure' => $secure, 'steps' => $transcript]);
+                $this->sendMailFn($to, $subject, $html, $from, $fromName);
+                return;
+            }
+            $write(base64_encode($pass), 'auth-pass', true);
+            $resp = $readResponse([235], 'auth-pass');
+            if (!$resp['ok']) {
+                fclose($fp);
+                $this->log('mail_smtp_auth_pass_failed', ['host' => $host, 'port' => $port, 'resp' => $resp]);
+                $this->log('mail_smtp_transcript', ['host' => $host, 'port' => $port, 'secure' => $secure, 'steps' => $transcript]);
+                $this->sendMailFn($to, $subject, $html, $from, $fromName);
+                return;
+            }
+        }
+
+        $write('MAIL FROM: <' . $from . '>');
+        $resp = $readResponse([250], 'mail-from');
+        if (!$resp['ok']) {
+            fclose($fp);
+            $this->log('mail_smtp_mailfrom_failed', ['host' => $host, 'port' => $port, 'resp' => $resp]);
+            $this->log('mail_smtp_transcript', ['host' => $host, 'port' => $port, 'secure' => $secure, 'steps' => $transcript]);
+            $this->sendMailFn($to, $subject, $html, $from, $fromName);
+            return;
+        }
+
+        $write('RCPT TO: <' . $to . '>');
+        $resp = $readResponse([250, 251], 'rcpt-to');
+        if (!$resp['ok']) {
+            fclose($fp);
+            $this->log('mail_smtp_rcpt_failed', ['host' => $host, 'port' => $port, 'resp' => $resp]);
+            $this->log('mail_smtp_transcript', ['host' => $host, 'port' => $port, 'secure' => $secure, 'steps' => $transcript]);
+            $this->sendMailFn($to, $subject, $html, $from, $fromName);
+            return;
+        }
+
+        $write('DATA');
+        $resp = $readResponse([354], 'data-start');
+        if (!$resp['ok']) {
+            fclose($fp);
+            $this->log('mail_smtp_data_start_failed', ['host' => $host, 'port' => $port, 'resp' => $resp]);
+            $this->log('mail_smtp_transcript', ['host' => $host, 'port' => $port, 'secure' => $secure, 'steps' => $transcript]);
+            $this->sendMailFn($to, $subject, $html, $from, $fromName);
+            return;
+        }
+
+        $msg = "From: {$fromName} <{$from}>\r\n";
+        $msg .= "To: <{$to}>\r\n";
+        $msg .= "Subject: {$subject}\r\n";
+        $msg .= "MIME-Version: 1.0\r\n";
+        $msg .= "Content-Type: text/html; charset=utf-8\r\n\r\n";
+        $msg .= $html . "\r\n.\r\n";
+        $write($msg, 'data', false);
+        $resp = $readResponse([250], 'data-end');
+
+        $write('QUIT');
+        $readResponse([221], 'quit');
+        fclose($fp);
+
+        $this->log('mail_smtp_transcript', ['host' => $host, 'port' => $port, 'secure' => $secure, 'steps' => $transcript]);
+
+        if (!$resp['ok']) {
+            $this->log('mail_smtp_send_failed', ['host' => $host, 'port' => $port, 'resp' => $resp]);
+            $this->sendMailFn($to, $subject, $html, $from, $fromName);
+            return;
+        }
+        $this->log('mail_smtp_sent', ['to' => $to, 'host' => $host, 'port' => $port, 'secure' => $secure]);
+    }
+}
diff --git a/src/App/Repository/MaterialMatrixRepository.php b/src/App/Repository/MaterialMatrixRepository.php
new file mode 100644
index 0000000..5b199a7
--- /dev/null
+++ b/src/App/Repository/MaterialMatrixRepository.php
@@ -0,0 +1,44 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use PDO;
+
+final class MaterialMatrixRepository
+{
+    public function __construct(private PDO $pdo) {}
+
+    public function listActivePrinters(): array
+    {
+        $stmt = $this->pdo->query('SELECT * FROM printers WHERE is_active = 1 ORDER BY name');
+        return $stmt->fetchAll();
+    }
+
+    public function listActiveMaterials(): array
+    {
+        $stmt = $this->pdo->query('SELECT * FROM materials WHERE is_active = 1 ORDER BY code');
+        return $stmt->fetchAll();
+    }
+
+    public function getPrinterById(int $printerId): ?array
+    {
+        $stmt = $this->pdo->prepare('SELECT * FROM printers WHERE id = :id');
+        $stmt->execute(['id' => $printerId]);
+        $row = $stmt->fetch();
+        return $row ?: null;
+    }
+
+    public function listMaterialsForPrinter(int $printerId): array
+    {
+        $sql = 'SELECT m.*, pms.support_level, pms.partial_reason, pms.extra_info
+                FROM materials m
+                LEFT JOIN printer_material_support pms
+                  ON pms.material_id = m.id AND pms.printer_id = :pid
+                WHERE m.is_active = 1
+                ORDER BY m.code';
+        $stmt = $this->pdo->prepare($sql);
+        $stmt->execute(['pid' => $printerId]);
+        return $stmt->fetchAll();
+    }
+}
diff --git a/src/App/Request.php b/src/App/Request.php
index e5553d8..f4a78ea 100644
--- a/src/App/Request.php
+++ b/src/App/Request.php
@@ -1 +1,47 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class Request
+{
+    public function scheme(): string
+    {
+        // Proxy / LB
+        if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
+            $proto = strtolower((string)$_SERVER['HTTP_X_FORWARDED_PROTO']);
+            if ($proto === 'https' || $proto === 'http') {
+                return $proto;
+            }
+        }
+        if (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') {
+            return 'https';
+        }
+        return 'http';
+    }
+
+    public function host(): string
+    {
+        return (string)($_SERVER['HTTP_HOST'] ?? 'localhost');
+    }
+
+    public function baseUrl(): string
+    {
+        return $this->scheme() . '://' . $this->host();
+    }
+
+    public function path(): string
+    {
+        return (string) strtok((string)($_SERVER['REQUEST_URI'] ?? '/'), '?');
+    }
+
+    public function currentUrl(bool $withQuery = true): string
+    {
+        $base = $this->baseUrl();
+        $uri  = (string)($_SERVER['REQUEST_URI'] ?? '/');
+        if ($withQuery) {
+            return $base . $uri;
+        }
+        return $base . (string) strtok($uri, '?');
+    }
+}
diff --git a/src/App/Search.php b/src/App/Search.php
index e5553d8..1d29d8b 100644
--- a/src/App/Search.php
+++ b/src/App/Search.php
@@ -1 +1,241 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class Search
+{
+    public function __construct(private ?\PDO $pdo) {}
+
+    public function searchEvents(string $query, int $limit = 100, ?array $geo = null): array
+    {
+        if (!$this->pdo) return [];
+
+        $q = trim($query);
+        $hasGeo = isset($geo['lat'], $geo['lng']) && is_numeric($geo['lat']) && is_numeric($geo['lng']);
+        if ($q === '' && !$hasGeo) return [];
+
+        $tokens = array_filter(preg_split('/\s+/', $q) ?: [], fn($t) => $t !== '');
+        if (!$tokens) {
+            $tokens = [$q];
+        }
+        // Nur Tokens ab 3 Zeichen für fuzzy/LIKE berücksichtigen
+        $tokens = array_values(array_filter($tokens, fn($t) => mb_strlen($t) >= 3));
+        if (!$tokens && !$hasGeo) return [];
+
+        $conditions = [];
+        $bindTokens = [];
+        $i = 0;
+        foreach ($tokens as $tok) {
+            $tok = trim($tok);
+            if ($tok === '') continue;
+            // LIKE + phonetic (SOUNDEX) to allow partial and typo-tolerant matches
+            $conditions[] = "(title LIKE CONCAT('%', ?, '%') OR teaser_public LIKE CONCAT('%', ?, '%') OR description LIKE CONCAT('%', ?, '%') OR city LIKE CONCAT('%', ?, '%') OR region LIKE CONCAT('%', ?, '%') OR zip LIKE CONCAT('%', ?, '%') OR SOUNDEX(title)=SOUNDEX(?) OR SOUNDEX(teaser_public)=SOUNDEX(?) OR SOUNDEX(description)=SOUNDEX(?) OR SOUNDEX(city)=SOUNDEX(?) OR SOUNDEX(region)=SOUNDEX(?))";
+            // LIKE bindings
+            $bindTokens[] = $tok;
+            $bindTokens[] = $tok;
+            $bindTokens[] = $tok;
+            $bindTokens[] = $tok;
+            $bindTokens[] = $tok;
+            $bindTokens[] = $tok;
+            // SOUNDEX bindings
+            $bindTokens[] = $tok;
+            $bindTokens[] = $tok;
+            $bindTokens[] = $tok;
+            $bindTokens[] = $tok;
+            $bindTokens[] = $tok;
+            $i++;
+        }
+
+        $whereParts = [
+            "starts_at >= NOW()",
+            "status != 'cancelled'",
+        ];
+        if ($conditions) {
+            // "OR" so that partial matches across tokens are allowed
+            $whereParts[] = '(' . implode(' OR ', $conditions) . ')';
+        }
+
+        $distanceFiltering = false;
+        $bind = [];
+        if ($hasGeo) {
+            $sql = "SELECT id, title, teaser_public, description, city, region, zip, starts_at, visibility, allow_kids, location_label, lat, lng,
+            (6371 * ACOS(LEAST(1,
+              COS(RADIANS(?)) * COS(RADIANS(lat)) * COS(RADIANS(lng) - RADIANS(?)) +
+              SIN(RADIANS(?)) * SIN(RADIANS(lat))
+            ))) AS distance_km";
+            $lat = (float)$geo['lat'];
+            $lng = (float)$geo['lng'];
+            $radius = isset($geo['radius']) && is_numeric($geo['radius']) ? max(0.1, (float)$geo['radius']) : 5.0;
+            $distanceFiltering = true;
+
+            $latRange = $radius / 111.0;
+            $lngRange = $radius / (111.0 * max(0.1, cos($lat * M_PI / 180)));
+            $whereParts[] = "(lat IS NOT NULL AND lng IS NOT NULL)";
+            $whereParts[] = "(lat BETWEEN ? AND ?)";
+            $whereParts[] = "(lng BETWEEN ? AND ?)";
+            // Haversine params (order must match SQL): first three
+            $bind[] = $lat; // COS(RADIANS(?))
+            $bind[] = $lng; // COS(RADIANS(lng) - RADIANS(?))
+            $bind[] = $lat; // SIN(RADIANS(?))
+            // THEN token binds
+            $bind = array_merge($bind, $bindTokens);
+            // Bounding box
+            $bind[] = $lat - $latRange;
+            $bind[] = $lat + $latRange;
+            $bind[] = $lng - $lngRange;
+            $bind[] = $lng + $lngRange;
+            // Radius for HAVING
+            $bind[] = $radius;
+        } else {
+            $sql = "SELECT id, title, teaser_public, description, city, region, zip, starts_at, visibility, allow_kids, location_label, lat, lng, NULL AS distance_km";
+            $bind = $bindTokens;
+        }
+
+        $where = $whereParts ? ('WHERE ' . implode(' AND ', $whereParts)) : '';
+        $sql .= " FROM events $where";
+        if ($distanceFiltering) {
+            $sql .= " HAVING distance_km <= ?";
+            $sql .= " ORDER BY distance_km ASC, starts_at ASC";
+        } else {
+            $sql .= " ORDER BY starts_at ASC";
+        }
+        $limit = (int)$limit;
+        $sql .= " LIMIT {$limit}";
+
+        $stmt = $this->pdo->prepare($sql);
+        try {
+            $stmt->execute($bind);
+            $rows = $stmt->fetchAll(\PDO::FETCH_ASSOC) ?: [];
+            if (!$hasGeo) {
+                foreach ($rows as &$r) {
+                    unset($r['distance_km']);
+                }
+                unset($r);
+            }
+            // Fuzzy filter: allow slight typos (Levenshtein <= 1 or 2)
+            if ($tokens) {
+                $rows = array_values(array_filter($rows, function ($row) use ($tokens) {
+                    $haystack = strtolower(
+                        ($row['title'] ?? '') . ' ' .
+                        ($row['teaser_public'] ?? '') . ' ' .
+                        ($row['description'] ?? '') . ' ' .
+                        ($row['city'] ?? '') . ' ' .
+                        ($row['region'] ?? '')
+                    );
+                    $words = preg_split('/[^a-z0-9äöüß]+/i', $haystack) ?: [];
+                    foreach ($tokens as $tok) {
+                        $t = strtolower($tok);
+                        if ($t === '') continue;
+                        if (str_contains($haystack, $t)) {
+                            return true;
+                        }
+                        foreach ($words as $w) {
+                            if ($w === '') continue;
+                            $dist = levenshtein($t, $w);
+                            if ($dist <= 1 || ($dist <= 2 && max(strlen($t), strlen($w)) > 4)) {
+                                return true;
+                            }
+                        }
+                    }
+                    return false;
+                }));
+            }
+            // Fallback: wenn keine Treffer, erneut ohne Token-Filter laden und nur fuzzy filtern
+            if (!$rows && $tokens) {
+                $wherePartsFallback = [
+                    "starts_at >= NOW()",
+                    "status != 'cancelled'",
+                ];
+                $bindFb = [];
+                $sqlFb = '';
+                if ($hasGeo) {
+                    $sqlFb = "SELECT id, title, teaser_public, description, city, region, zip, starts_at, visibility, allow_kids, location_label, lat, lng,
+                    (6371 * ACOS(LEAST(1,
+                      COS(RADIANS(?)) * COS(RADIANS(lat)) * COS(RADIANS(lng) - RADIANS(?)) +
+                      SIN(RADIANS(?)) * SIN(RADIANS(lat))
+                    ))) AS distance_km";
+                    $lat = (float)$geo['lat'];
+                    $lng = (float)$geo['lng'];
+                    $radius = isset($geo['radius']) && is_numeric($geo['radius']) ? max(0.1, (float)$geo['radius']) : 5.0;
+                    $latRange = $radius / 111.0;
+                    $lngRange = $radius / (111.0 * max(0.1, cos($lat * M_PI / 180)));
+                    $wherePartsFallback[] = "(lat IS NOT NULL AND lng IS NOT NULL)";
+                    $wherePartsFallback[] = "(lat BETWEEN ? AND ?)";
+                    $wherePartsFallback[] = "(lng BETWEEN ? AND ?)";
+                    $bindFb[] = $lat;
+                    $bindFb[] = $lng;
+                    $bindFb[] = $lat;
+                    $bindFb[] = $lat - $latRange;
+                    $bindFb[] = $lat + $latRange;
+                    $bindFb[] = $lng - $lngRange;
+                    $bindFb[] = $lng + $lngRange;
+                    $bindFb[] = $radius;
+                    $havingFb = true;
+                } else {
+                    $sqlFb = "SELECT id, title, teaser_public, description, city, region, zip, starts_at, visibility, allow_kids, location_label, lat, lng, 1 AS distance_km";
+                    $havingFb = false;
+                }
+                $whereFb = $wherePartsFallback ? ('WHERE ' . implode(' AND ', $wherePartsFallback)) : '';
+                $sqlFb .= " FROM events $whereFb";
+                if ($havingFb) {
+                    $sqlFb .= " HAVING distance_km <= ?";
+                    $sqlFb .= " ORDER BY distance_km ASC, starts_at ASC";
+                } else {
+                    $sqlFb .= " ORDER BY starts_at ASC";
+                }
+                $sqlFb .= " LIMIT {$limit}";
+                $stmtFb = $this->pdo->prepare($sqlFb);
+                $stmtFb->execute($bindFb);
+                $rowsFb = $stmtFb->fetchAll(\PDO::FETCH_ASSOC) ?: [];
+                if ($rowsFb) {
+                    $rows = array_values(array_filter($rowsFb, function ($row) use ($tokens) {
+                        $haystack = strtolower(
+                            ($row['title'] ?? '') . ' ' .
+                            ($row['teaser_public'] ?? '') . ' ' .
+                            ($row['description'] ?? '') . ' ' .
+                            ($row['city'] ?? '') . ' ' .
+                            ($row['region'] ?? '')
+                        );
+                        $words = preg_split('/[^a-z0-9äöüß]+/i', $haystack) ?: [];
+                        foreach ($tokens as $tok) {
+                            $t = strtolower($tok);
+                            if ($t === '') continue;
+                            if (str_contains($haystack, $t)) {
+                                return true;
+                            }
+                            foreach ($words as $w) {
+                                if ($w === '') continue;
+                                $dist = levenshtein($t, $w);
+                                if ($dist <= 1 || ($dist <= 2 && max(strlen($t), strlen($w)) > 4)) {
+                                    return true;
+                                }
+                            }
+                        }
+                        return false;
+                    }));
+                }
+            }
+            if (defined('APP_ENV') && APP_ENV === 'staging') {
+                $logOk = [
+                    'status' => 'ok',
+                    'sql' => $sql,
+                    'bind' => $bind,
+                    'count' => count($rows),
+                    'fallback' => ($rows ? 'primary' : 'fallback'),
+                ];
+                @file_put_contents(__DIR__ . '/../../debug/search_debug.log', print_r($logOk, true));
+            }
+            return $rows;
+        } catch (\PDOException $e) {
+            // Log into /debug/search_debug.log and continue with empty results
+            $logErr = [
+                'error' => $e->getMessage(),
+                'sql' => $sql,
+                'bind' => $bind,
+            ];
+            @file_put_contents(__DIR__ . '/../../debug/search_debug.log', print_r($logErr, true));
+            return [];
+        }
+    }
+}
diff --git a/src/App/SessionManager.php b/src/App/SessionManager.php
index e5553d8..5e57034 100644
--- a/src/App/SessionManager.php
+++ b/src/App/SessionManager.php
@@ -1 +1,71 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class SessionManager
+{
+    private string $sessionCookieName;
+    private string $clientCookieName;
+
+    public function __construct(private Config $config)
+    {
+        $prefix = $config->cookiePrefix();
+        $this->sessionCookieName = $prefix . 'session';
+        $this->clientCookieName  = $prefix . 'client';
+    }
+
+    public function start(): void
+    {
+        if (PHP_SAPI === 'cli') {
+            return;
+        }
+        if (session_status() !== PHP_SESSION_NONE) {
+            return;
+        }
+
+        session_name($this->sessionCookieName);
+
+        $secure = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off')
+            || (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https');
+
+        session_set_cookie_params([
+            'lifetime' => 0,
+            'path'     => '/',
+            'domain'   => $this->config->cookieDomain(),
+            'secure'   => $secure,
+            'httponly' => true,
+            'samesite' => 'Lax',
+        ]);
+
+        session_start();
+    }
+
+    public function ensureClientId(int $lifetimeSeconds = 31536000): string
+    {
+        if (PHP_SAPI === 'cli') {
+            return 'cli';
+        }
+
+        $id = $_COOKIE[$this->clientCookieName] ?? null;
+        if (!is_string($id) || !preg_match('/^[a-f0-9]{64}$/', $id)) {
+            $id = bin2hex(random_bytes(32));
+
+            $secure = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off')
+                || (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https');
+
+            setcookie($this->clientCookieName, $id, [
+                'expires'  => time() + $lifetimeSeconds,
+                'path'     => '/',
+                'domain'   => $this->config->cookieDomain(),
+                'secure'   => $secure,
+                'httponly' => false, // accessible to JS if needed
+                'samesite' => 'Lax',
+            ]);
+
+            $_COOKIE[$this->clientCookieName] = $id;
+        }
+
+        return $id;
+    }
+}
diff --git a/src/README.md b/src/README.md
deleted file mode 100644
index b493024..0000000
--- a/src/README.md
+++ /dev/null
@@ -1 +0,0 @@
-# src\n\nTODO: Core backend/business logic.\n
diff --git a/src/config.php b/src/config.php
deleted file mode 100755
index 7ea6e0a..0000000
--- a/src/config.php
+++ /dev/null
@@ -1,2 +0,0 @@
-<?php
-return require __DIR__ . '/../config/config.php';
diff --git a/src/helpers.php b/src/helpers.php
index e5553d8..acae534 100644
--- a/src/helpers.php
+++ b/src/helpers.php
@@ -1 +1,103 @@
-<?php // TODO
+<?php
+declare(strict_types=1);
+
+use App\App;
+
+function app(): App
+{
+    return App::get();
+}
+
+function t(string $key, $default = '', array $vars = []): string
+{
+    return app()->i18n()->get($key, $default, $vars);
+}
+
+function tpl(string $file, string $type = 'structure', string $site = 'main'): void
+{
+    $base = __DIR__ . '/../partials/';
+
+    // very small validation
+    foreach ([$file, $type, $site] as $v) {
+        if (preg_match('/[^a-zA-Z0-9_\-]/', $v)) {
+            echo "<!-- tpl(): invalid parameter -->";
+            return;
+        }
+    }
+
+    if ($type === 'landing') {
+        $path = $base . "landing/$site/$file.php";
+    } else {
+        $path = $base . "structure/$file.php";
+    }
+
+    if (file_exists($path)) {
+        include $path;
+    } else {
+        echo "<!-- tpl(): not found: $path -->";
+    }
+}
+
+function app_primary_domain(): string
+{
+    if (defined('APP_DOMAIN_PRIMARY')) {
+        return APP_DOMAIN_PRIMARY;
+    }
+    if (defined('APP_DOMAIN_NAME')) {
+        return APP_DOMAIN_NAME;
+    }
+    return $_SERVER['HTTP_HOST'] ?? '';
+}
+
+function app_fakecheck_domain(): string
+{
+    if (defined('APP_DOMAIN_FAKECHECK')) {
+        return APP_DOMAIN_FAKECHECK;
+    }
+    return app_primary_domain();
+}
+
+function asset_styles(): void
+{
+    $styles = app()->assets()->styles();
+
+    // simple priority order
+    $order = ['early' => 0, 'normal' => 1, 'late' => 2];
+    usort($styles, fn($a,$b) => ($order[$a['priority']] ?? 1) <=> ($order[$b['priority']] ?? 1));
+
+    foreach ($styles as $s) {
+        $href = $s['href'];
+        $v    = $s['version'];
+        if ($v !== null && $v !== '') {
+            $sep  = (str_contains($href, '?') ? '&' : '?');
+            $href = $href . $sep . 'v=' . rawurlencode((string)$v);
+        }
+        echo '<link rel="stylesheet" href="' . htmlspecialchars($href, ENT_QUOTES) . '">' . "\n";
+    }
+}
+
+function asset_scripts(string $pos = 'footer'): void
+{
+    $scripts = ($pos === 'header') ? app()->assets()->headerScripts() : app()->assets()->footerScripts();
+
+    foreach ($scripts as $s) {
+        $src = $s['src'];
+        $v   = $s['version'];
+        if ($v !== null && $v !== '') {
+            $sep = (str_contains($src, '?') ? '&' : '?');
+            $src = $src . $sep . 'v=' . rawurlencode((string)$v);
+        }
+
+        $attrs = '';
+        if (!empty($s['defer'])) $attrs .= ' defer';
+        if (!empty($s['async'])) $attrs .= ' async';
+
+        echo '<script src="' . htmlspecialchars($src, ENT_QUOTES) . '"' . $attrs . '></script>' . "\n";
+    }
+}
+
+function redirect(string $path): void
+{
+    header('Location: ' . $path, true, 303);
+    exit;
+}
diff --git a/tools/.gitkeep b/tools/.gitkeep
index 8b13789..e69de29 100644
--- a/tools/.gitkeep
+++ b/tools/.gitkeep
@@ -1 +0,0 @@
-
diff --git a/tools/db.php b/tools/db.php
deleted file mode 100644
index 7cac6f8..0000000
--- a/tools/db.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-function tools_build_pdo(): PDO
-{
-    $cfg = require __DIR__ . '/../src/config.php';
-    if (!is_array($cfg)) {
-        throw new RuntimeException('DB config did not return an array.');
-    }
-    $required = ['db_host', 'db_name', 'db_user', 'db_pass', 'db_charset'];
-    foreach ($required as $key) {
-        if (!array_key_exists($key, $cfg)) {
-            throw new RuntimeException('Missing DB config key: ' . $key);
-        }
-    }
-    $dsn = "mysql:host={$cfg['db_host']};dbname={$cfg['db_name']};charset={$cfg['db_charset']}";
-    $options = [
-        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
-        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
-    ];
-
-    return new PDO($dsn, $cfg['db_user'], $cfg['db_pass'], $options);
-}
diff --git a/tools/printers.php b/tools/printers.php
deleted file mode 100644
index 674261c..0000000
--- a/tools/printers.php
+++ /dev/null
@@ -1,6 +0,0 @@
-<?php
-function tools_fetch_active_printers(PDO $pdo): array
-{
-    $stmt = $pdo->query("SELECT * FROM printers WHERE is_active = 1 ORDER BY name");
-    return $stmt->fetchAll();
-}