commit b0ee86c9247f09588422a708ffdb8900ec828b04
Author: Miksa <vamosimiksa@gmail.com>
Date:   Fri May 22 23:05:37 2026 +0200

    first commit

diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..09e2187
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,6 @@
+node_modules
+npm-debug.log
+.git
+.gitignore
+.env
+uploads
diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..eb1c38d
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,3 @@
+PORT=3000
+JWT_SECRET=elevator-manager-secret
+DATABASE_URL=postgresql://lift_admin:lift_secret@127.0.0.1:5432/lift_manager
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5e77f51
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+node_modules/
+uploads/
+data/store.json
+.env
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e35dc32
--- /dev/null
+++ b/README.md
@@ -0,0 +1,239 @@
+# LiftEllenőr
+
+Magyar nyelvű liftellenőrzési és naplózási rendszer technikusok számára.
+
+Az alkalmazás főbb részei:
+
+- nyilvános landing oldal: `/`
+- bejelentkezés: `/bejelentkezes`
+- regisztráció: `/regisztracio`
+- technikusi kezelőfelület: `/alkalmazas`
+- kereshető naplóoldal: `/naplo`
+
+## Funkciók
+
+- JWT alapú hitelesítés
+- PostgreSQL adatbázis
+- külön kezelt eszközök és naplóbejegyzések
+- modalos új eszköz / új napló folyamat
+- PDF csatolmányok feltöltése egy naplóhoz
+- közelgő ellenőrzési határidők műszerfala
+- Adminer webes adatbázis-kezelő a stack részeként
+- nagy mennyiségű tesztadat generálása seed scripttel
+
+## Stack
+
+A `compose.yaml` alapján a rendszer ezekből a szolgáltatásokból áll:
+
+- `frontend`
+  Nginx konténer, a statikus frontend kiszolgálására és az API proxyzására.
+- `backend`
+  Node.js + Express alkalmazás, API-val és hitelesítéssel.
+- `postgres`
+  PostgreSQL adatbázis a felhasználók, eszközök, naplók és fájlmetaadatok tárolására.
+- `adminer`
+  Webes adatbázis-kezelő a PostgreSQL gyors böngészéséhez és ellenőrzéséhez.
+
+## Portok
+
+- alkalmazás: `http://localhost:8080`
+- PostgreSQL: `localhost:5432`
+- Adminer: `http://localhost:8090`
+
+## Előfeltételek
+
+- Node.js 22 körüli verzió
+- npm
+- Podman Compose vagy Docker Compose
+
+## Gyors indítás
+
+1. Függőségek telepítése:
+
+```bash
+npm install
+```
+
+2. A teljes stack indítása:
+
+```bash
+podman compose up -d
+```
+
+Ha Docker Compose-t használsz:
+
+```bash
+docker compose up -d
+```
+
+3. Nyisd meg az alkalmazást:
+
+```text
+http://localhost:8080
+```
+
+## Stack kezelése
+
+Indítás:
+
+```bash
+podman compose up -d
+```
+
+Leállítás:
+
+```bash
+podman compose down
+```
+
+Leállítás kötetekkel együtt:
+
+```bash
+podman compose down -v
+```
+
+Logok megtekintése:
+
+```bash
+podman compose logs -f
+```
+
+Csak a backend logjai:
+
+```bash
+podman compose logs -f backend
+```
+
+## Adminer használata
+
+Az Adminer a `http://localhost:8090` címen érhető el.
+
+Bejelentkezési adatok:
+
+- rendszer: `PostgreSQL`
+- szerver: `postgres`
+  Ha a böngészőből közvetlenül a hoston futó PostgreSQL-re csatlakozol, használhatod a `127.0.0.1` címet is, de a compose stacken belül a szolgáltatás neve `postgres`.
+- felhasználó: `lift_admin`
+- jelszó: `lift_secret`
+- adatbázis: `lift_manager`
+
+Adminerben hasznos műveletek:
+
+- `users` tábla ellenőrzése
+- `elevators` tábla böngészése
+- `logs` és `log_files` kapcsolatok megtekintése
+- seed után gyors ellenőrzés, hogy a tömeges tesztadat bekerült-e
+
+## Seed adatok
+
+A projekt tartalmaz egy seed scriptet sok tesztadat előállításához:
+
+```bash
+npm run seed
+```
+
+Ez több útvonalat, technikust, eszközt és sok kapcsolódó naplóbejegyzést hoz létre.
+
+Alap teszt jelszó:
+
+```text
+teszt123
+```
+
+Teljes újratöltéshez, a meglévő adatok törlésével:
+
+```bash
+npm run seed:reset
+```
+
+Egyedi mennyiségekkel:
+
+```bash
+node scripts/seed.js --reset --routes 8 --users-per-route 4 --elevators-per-route 20 --logs-per-elevator 16
+```
+
+Elérhető paraméterek:
+
+- `--reset`
+  Törli a meglévő adatokat seed előtt.
+- `--routes`
+  Hány technikusi útvonal készüljön.
+- `--users-per-route`
+  Hány felhasználó készüljön útvonalanként.
+- `--elevators-per-route`
+  Hány eszköz készüljön útvonalanként.
+- `--logs-per-elevator`
+  Hány napló készüljön eszközönként.
+
+## Fejlesztői használat
+
+Ha nem konténerből akarod indítani a backendet:
+
+1. gondoskodj róla, hogy a PostgreSQL fusson
+2. telepítsd a függőségeket
+3. indítsd a szervert
+
+```bash
+npm install
+npm start
+```
+
+Alapértelmezett backend port:
+
+```text
+http://localhost:3000
+```
+
+Ebben az esetben a frontend proxyzása nélkül a teljes alkalmazás használatához továbbra is a compose-os Nginx a legegyszerűbb út.
+
+## Környezeti változók
+
+Az alapértelmezett értékek az `.env.example` fájlban vannak összegyűjtve.
+
+Fontos változók:
+
+- `PORT`
+- `JWT_SECRET`
+- `DATABASE_URL`
+- `SEED_PASSWORD`
+  Opcionális. Ezzel felülírható a seedelt felhasználók alap jelszava.
+
+## Adatmodell röviden
+
+- `users`
+  Technikusi felhasználók és útvonalak.
+- `elevators`
+  Az eszközök aktuális állapota és következő ellenőrzési adatai.
+- `logs`
+  Történeti naplóbejegyzések, eszközhöz kapcsolva.
+- `log_files`
+  A naplóbejegyzésekhez tartozó PDF fájlmetaadatok.
+
+## Tipikus használati folyamat
+
+1. Indítsd el a stack-et.
+2. Ha kell, seedeld az adatbázist `npm run seed:reset` paranccsal.
+3. Nyisd meg az alkalmazást a `http://localhost:8080` címen.
+4. Jelentkezz be vagy regisztrálj.
+5. Az `/alkalmazas` oldalon kezeld az eszközöket és hozz létre új naplóbejegyzéseket.
+6. A `/naplo` oldalon keresd és szűrd a bejegyzéseket.
+7. Adminerben ellenőrizd az adatokat, ha fejlesztés vagy hibakeresés közben szükséges.
+
+## Fontos fájlok
+
+- `server.js`
+  Express route-ok, auth, adatbázis-műveletek
+- `compose.yaml`
+  frontend + backend + postgres + adminer stack
+- `nginx/default.conf`
+  frontend route-ok és API proxy
+- `public/index.html`
+  landing oldal
+- `public/app.html`
+  kezelőfelület
+- `public/logs.html`
+  külön naplóoldal
+- `public/style.css`
+  központi stíluslap
+- `scripts/seed.js`
+  tesztadat-generáló script
diff --git a/compose.yaml b/compose.yaml
new file mode 100644
index 0000000..4dd2ba9
--- /dev/null
+++ b/compose.yaml
@@ -0,0 +1,54 @@
+services:
+  frontend:
+    image: docker.io/library/nginx:1.27-alpine
+    container_name: lift-frontend
+    restart: unless-stopped
+    depends_on:
+      - backend
+    ports:
+      - "8080:80"
+    volumes:
+      - ./public:/usr/share/nginx/html:ro
+      - ./nginx/default.conf:/etc/nginx/conf.d/default.conf:ro
+
+  backend:
+    image: docker.io/library/node:22-alpine
+    container_name: lift-backend
+    restart: unless-stopped
+    depends_on:
+      - postgres
+    working_dir: /app
+    environment:
+      PORT: 3000
+      JWT_SECRET: elevator-manager-secret
+      DATABASE_URL: postgresql://lift_admin:lift_secret@postgres:5432/lift_manager
+    command: sh -c "npm ci --omit=dev && npm start"
+    volumes:
+      - ./package.json:/app/package.json:ro
+      - ./package-lock.json:/app/package-lock.json:ro
+      - ./server.js:/app/server.js:ro
+      - ./public:/app/public:ro
+      - ./data:/app/data
+      - ./uploads:/app/uploads
+
+  postgres:
+    image: docker.io/library/postgres:16-alpine
+    container_name: lift-postgres
+    restart: unless-stopped
+    environment:
+      POSTGRES_DB: lift_manager
+      POSTGRES_USER: lift_admin
+      POSTGRES_PASSWORD: lift_secret
+    ports:
+      - "5432:5432"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+
+  adminer:
+    image: adminer
+    restart: always
+    ports:
+      - 8090:8080
+
+volumes:
+  postgres_data:
diff --git a/nginx/default.conf b/nginx/default.conf
new file mode 100644
index 0000000..1eb960b
--- /dev/null
+++ b/nginx/default.conf
@@ -0,0 +1,67 @@
+server {
+  listen 80;
+  server_name _;
+
+  root /usr/share/nginx/html;
+  index login.html;
+
+  location = / {
+    proxy_pass http://backend:3000;
+    proxy_http_version 1.1;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+  }
+
+  location = /bejelentkezes {
+    proxy_pass http://backend:3000;
+    proxy_http_version 1.1;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+  }
+
+  location = /regisztracio {
+    proxy_pass http://backend:3000;
+    proxy_http_version 1.1;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+  }
+
+  location = /alkalmazas {
+    proxy_pass http://backend:3000;
+    proxy_http_version 1.1;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+  }
+
+  location = /naplo {
+    proxy_pass http://backend:3000;
+    proxy_http_version 1.1;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+  }
+
+  location /api/ {
+    proxy_pass http://backend:3000;
+    proxy_http_version 1.1;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+  }
+
+  location / {
+    add_header Cache-Control "no-store, no-cache, must-revalidate, proxy-revalidate";
+    expires off;
+    try_files $uri $uri/ =404;
+  }
+}
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..39efa8f
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1785 @@
+{
+  "name": "elevator-man",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "elevator-man",
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+      }
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+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..0cac808
--- /dev/null
+++ b/package.json
@@ -0,0 +1,27 @@
+{
+  "name": "elevator-man",
+  "version": "1.0.0",
+  "description": "Magyar nyelvű liftellenőrzési kezelő JWT auth-tal, PDF feltöltéssel és PostgreSQL adatbázissal.",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js",
+    "seed": "node scripts/seed.js",
+    "seed:reset": "node scripts/seed.js --reset"
+  },
+  "keywords": [
+    "elevator",
+    "inspection",
+    "jwt",
+    "bcrypt",
+    "postgres"
+  ],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "bcrypt": "^5.1.1",
+    "express": "^4.21.2",
+    "jsonwebtoken": "^9.0.2",
+    "multer": "^2.0.2",
+    "pg": "^8.13.1"
+  }
+}
diff --git a/public/app.html b/public/app.html
new file mode 100644
index 0000000..277fe59
--- /dev/null
+++ b/public/app.html
@@ -0,0 +1,189 @@
+<!DOCTYPE html>
+<html lang="hu">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Alkalmazás | LiftEllenőr</title>
+    <link rel="stylesheet" href="/style.css?v=20260522-5" />
+  </head>
+  <body>
+    <div id="pageShell">
+      <main id="appShell">
+        <div id="topBar" class="panel app-topbar">
+          <div class="topbar-heading">
+            <img class="topbar-logo" src="/logo.png" alt="" aria-hidden="true" />
+            <div>
+              <h1 id="welcomeText" class="page-title">Kezelőfelület</h1>
+              <p id="routeText" class="page-text"></p>
+            </div>
+          </div>
+          <div class="panel-actions">
+            <a class="ghost-button" href="/naplo">Napló megnyitása</a>
+            <button id="logoutButton" class="ghost-button" type="button">Kijelentkezés</button>
+          </div>
+        </div>
+
+        <section class="panel">
+          <div class="panel-head">
+            <div class="section-heading">
+              <h2>Határidők</h2>
+              <p>A bejelentkezett technikus útvonalához tartozó, a következő 7 napban esedékes ellenőrzések.</p>
+            </div>
+          </div>
+          <div id="dashboardCards" class="dashboard-grid"></div>
+        </section>
+
+        <section class="panel">
+          <div class="panel-head">
+            <div class="section-heading">
+              <h2>Eszközök</h2>
+              <p>Külön kezelt eszközlista, amelynek az állapota új naplóbejegyzésekkel frissül.</p>
+            </div>
+            <div class="panel-actions">
+              <button id="openDeviceModalButton" class="secondary-button" type="button">Új eszköz</button>
+              <button id="openLogModalButton" class="primary-button" type="button">Új napló</button>
+            </div>
+          </div>
+          <div id="deviceList" class="entries-grid"></div>
+        </section>
+      </main>
+    </div>
+
+    <div id="deviceModal" class="modal-backdrop hidden">
+      <div class="modal-panel" role="dialog" aria-modal="true" aria-labelledby="deviceModalTitle">
+        <div class="modal-head">
+          <div class="section-heading">
+            <h2 id="deviceModalTitle">Új eszköz</h2>
+            <p id="deviceModalSubtitle">Új lift vagy berendezés rögzítése a technikusi útvonalhoz.</p>
+          </div>
+          <button id="closeDeviceModalButton" class="ghost-button modal-close" type="button">Bezárás</button>
+        </div>
+
+        <form id="deviceForm">
+          <input id="deviceEditId" name="elevatorId" type="hidden" />
+
+          <div class="form-grid">
+            <div class="field-wrap">
+              <label for="deviceName">Eszköz neve</label>
+              <input id="deviceName" name="name" type="text" required />
+            </div>
+
+            <div class="field-wrap">
+              <label for="deviceSerialNumber">Gyári szám</label>
+              <input id="deviceSerialNumber" name="serialNumber" type="text" required />
+            </div>
+
+            <div class="field-wrap field-wide">
+              <label for="deviceLocation">Helyszín</label>
+              <input id="deviceLocation" name="location" type="text" required />
+            </div>
+
+            <div class="field-wrap">
+              <label for="deviceRouteName">Technikusi útvonal</label>
+              <input id="deviceRouteName" class="readonly-input" name="routeName" type="text" readonly />
+            </div>
+
+            <div class="field-wrap">
+              <label for="deviceStatus">Aktuális állapot</label>
+              <select id="deviceStatus" name="status">
+                <option value="rendben">Rendben</option>
+                <option value="figyelmeztetes">Figyelmeztetés</option>
+                <option value="lejart">Lejárt</option>
+              </select>
+            </div>
+
+            <div class="field-wrap">
+              <label for="deviceInspectionIntervalDays">Ellenőrzési ciklus napokban</label>
+              <input id="deviceInspectionIntervalDays" name="inspectionIntervalDays" type="number" min="1" value="30" required />
+            </div>
+
+            <div class="field-wrap">
+              <label for="deviceNextInspectionDate">Következő ellenőrzés</label>
+              <input id="deviceNextInspectionDate" name="nextInspectionDate" type="date" />
+            </div>
+          </div>
+
+          <div class="form-actions">
+            <div class="inline-actions">
+              <button id="deviceSubmitButton" class="primary-button" type="submit">Eszköz mentése</button>
+              <button id="cancelDeviceModalButton" class="ghost-button" type="button">Mégse</button>
+            </div>
+            <p id="deviceMessage" class="feedback-text"></p>
+          </div>
+        </form>
+      </div>
+    </div>
+
+    <div id="logModal" class="modal-backdrop hidden">
+      <div class="modal-panel" role="dialog" aria-modal="true" aria-labelledby="logModalTitle">
+        <div class="modal-head">
+          <div class="section-heading">
+            <h2 id="logModalTitle">Új naplóbejegyzés</h2>
+            <p>Egy meglévő eszköz állapotának frissítése új ellenőrzési naplóval.</p>
+          </div>
+          <button id="closeLogModalButton" class="ghost-button modal-close" type="button">Bezárás</button>
+        </div>
+
+        <form id="logForm">
+          <div class="form-grid">
+            <div class="field-wrap field-wide">
+              <label for="logElevatorId">Eszköz kiválasztása</label>
+              <select id="logElevatorId" name="elevatorId" required></select>
+            </div>
+
+            <div class="field-wrap field-wide">
+              <div id="logElevatorSummary" class="summary-card">
+                Válassz ki egy eszközt a naplóbejegyzéshez.
+              </div>
+            </div>
+
+            <div class="field-wrap">
+              <label for="logStatus">Állapot</label>
+              <select id="logStatus" name="status">
+                <option value="rendben">Rendben</option>
+                <option value="figyelmeztetes">Figyelmeztetés</option>
+                <option value="lejart">Lejárt</option>
+              </select>
+            </div>
+
+            <div class="field-wrap">
+              <label for="logInspectionDate">Ellenőrzés dátuma</label>
+              <input id="logInspectionDate" name="inspectionDate" type="date" required />
+            </div>
+
+            <div class="field-wrap">
+              <label for="logInspectionIntervalDays">Ellenőrzési ciklus napokban</label>
+              <input id="logInspectionIntervalDays" name="inspectionIntervalDays" type="number" min="1" value="30" required />
+            </div>
+
+            <div class="field-wrap">
+              <label for="logNextInspectionDate">Következő ellenőrzés</label>
+              <input id="logNextInspectionDate" name="nextInspectionDate" type="date" required />
+            </div>
+
+            <div class="field-wrap field-wide">
+              <label for="logNotes">Megjegyzés</label>
+              <textarea id="logNotes" name="notes" rows="4" placeholder="Rövid állapotleírás vagy teendő"></textarea>
+            </div>
+
+            <div class="field-wrap field-wide">
+              <label for="logPdfs">PDF csatolmányok</label>
+              <input id="logPdfs" name="pdfs" type="file" accept="application/pdf,.pdf" multiple />
+            </div>
+          </div>
+
+          <div class="form-actions">
+            <div class="inline-actions">
+              <button id="logSubmitButton" class="primary-button" type="submit">Bejegyzés mentése</button>
+              <button id="openDeviceFromLogButton" class="secondary-button" type="button">Új eszköz létrehozása</button>
+              <button id="cancelLogModalButton" class="ghost-button" type="button">Mégse</button>
+            </div>
+            <p id="logMessage" class="feedback-text"></p>
+          </div>
+        </form>
+      </div>
+    </div>
+
+    <script src="/app.js?v=20260522-5"></script>
+  </body>
+</html>
diff --git a/public/app.js b/public/app.js
new file mode 100644
index 0000000..257d6f2
--- /dev/null
+++ b/public/app.js
@@ -0,0 +1,543 @@
+const state = {
+  user: null,
+  devices: [],
+  dashboardElevators: [],
+  countdownIntervalId: null,
+  activeModal: null,
+  selectedLogElevatorId: null
+};
+
+const elements = {
+  welcomeText: document.getElementById("welcomeText"),
+  routeText: document.getElementById("routeText"),
+  logoutButton: document.getElementById("logoutButton"),
+  dashboardCards: document.getElementById("dashboardCards"),
+  deviceList: document.getElementById("deviceList"),
+  openDeviceModalButton: document.getElementById("openDeviceModalButton"),
+  openLogModalButton: document.getElementById("openLogModalButton"),
+  deviceModal: document.getElementById("deviceModal"),
+  logModal: document.getElementById("logModal"),
+  deviceForm: document.getElementById("deviceForm"),
+  deviceEditId: document.getElementById("deviceEditId"),
+  deviceModalTitle: document.getElementById("deviceModalTitle"),
+  deviceModalSubtitle: document.getElementById("deviceModalSubtitle"),
+  deviceRouteName: document.getElementById("deviceRouteName"),
+  deviceName: document.getElementById("deviceName"),
+  deviceSerialNumber: document.getElementById("deviceSerialNumber"),
+  deviceLocation: document.getElementById("deviceLocation"),
+  deviceStatus: document.getElementById("deviceStatus"),
+  deviceInspectionIntervalDays: document.getElementById("deviceInspectionIntervalDays"),
+  deviceNextInspectionDate: document.getElementById("deviceNextInspectionDate"),
+  deviceMessage: document.getElementById("deviceMessage"),
+  closeDeviceModalButton: document.getElementById("closeDeviceModalButton"),
+  cancelDeviceModalButton: document.getElementById("cancelDeviceModalButton"),
+  logForm: document.getElementById("logForm"),
+  logElevatorId: document.getElementById("logElevatorId"),
+  logElevatorSummary: document.getElementById("logElevatorSummary"),
+  logStatus: document.getElementById("logStatus"),
+  logInspectionDate: document.getElementById("logInspectionDate"),
+  logInspectionIntervalDays: document.getElementById("logInspectionIntervalDays"),
+  logNextInspectionDate: document.getElementById("logNextInspectionDate"),
+  logMessage: document.getElementById("logMessage"),
+  closeLogModalButton: document.getElementById("closeLogModalButton"),
+  cancelLogModalButton: document.getElementById("cancelLogModalButton"),
+  openDeviceFromLogButton: document.getElementById("openDeviceFromLogButton")
+};
+
+bindEvents();
+bootPage();
+
+function bindEvents() {
+  elements.logoutButton.addEventListener("click", logout);
+  elements.openDeviceModalButton.addEventListener("click", () => openDeviceModal());
+  elements.openLogModalButton.addEventListener("click", () => openLogModal());
+  elements.deviceForm.addEventListener("submit", handleDeviceSave);
+  elements.logForm.addEventListener("submit", handleLogSave);
+  elements.closeDeviceModalButton.addEventListener("click", closeActiveModal);
+  elements.cancelDeviceModalButton.addEventListener("click", closeActiveModal);
+  elements.closeLogModalButton.addEventListener("click", closeActiveModal);
+  elements.cancelLogModalButton.addEventListener("click", closeActiveModal);
+  elements.openDeviceFromLogButton.addEventListener("click", handleOpenDeviceFromLog);
+  elements.logElevatorId.addEventListener("change", handleLogElevatorChange);
+  elements.logInspectionDate.addEventListener("change", syncLogNextInspectionDate);
+  elements.logInspectionIntervalDays.addEventListener("input", syncLogNextInspectionDate);
+  elements.deviceList.addEventListener("click", handleDeviceListClick);
+  elements.deviceModal.addEventListener("click", handleModalBackdropClick);
+  elements.logModal.addEventListener("click", handleModalBackdropClick);
+  window.addEventListener("keydown", handleWindowKeydown);
+  window.addEventListener("pageshow", handlePageShow);
+}
+
+async function bootPage() {
+  setToday(elements.logInspectionDate);
+  syncLogNextInspectionDate();
+  renderDevices();
+  renderDashboard();
+
+  try {
+    const response = await apiFetch("/api/me");
+    state.user = response.user;
+    fillUserHeader();
+    elements.deviceRouteName.value = state.user?.routeName || "";
+    await Promise.allSettled([loadDashboard(), loadDevices()]);
+  } catch (error) {
+    if (error.status === 401) {
+      window.location.href = "/bejelentkezes";
+      return;
+    }
+
+    elements.welcomeText.textContent = "Betöltési hiba";
+    elements.routeText.textContent = "A munkamenet ellenőrzése nem sikerült. Frissítsd az oldalt vagy jelentkezz be újra.";
+    setFeedback(elements.logMessage, error.message, "error");
+  }
+}
+
+function fillUserHeader() {
+  const name = state.user?.fullName || "Felhasználó";
+  const route = state.user?.routeName || "Nincs megadva";
+  elements.welcomeText.textContent = "Kezelőfelület";
+  elements.routeText.textContent = `${name} · Technikusi útvonal: ${route}`;
+}
+
+async function loadDashboard() {
+  try {
+    const response = await apiFetch("/api/dashboard");
+    state.dashboardElevators = response.elevators || [];
+    renderDashboard();
+  } catch (error) {
+    state.dashboardElevators = [];
+    renderDashboard();
+    setFeedback(elements.logMessage, error.message, "error");
+  }
+}
+
+async function loadDevices() {
+  try {
+    const response = await apiFetch("/api/elevators");
+    state.devices = response.elevators || [];
+    renderDevices();
+    renderLogElevatorOptions(state.selectedLogElevatorId);
+  } catch (error) {
+    state.devices = [];
+    renderDevices();
+    renderLogElevatorOptions(null);
+    setFeedback(elements.deviceMessage, error.message, "error");
+  }
+}
+
+function renderDashboard() {
+  if (!state.dashboardElevators.length) {
+    elements.dashboardCards.innerHTML = `
+      <article class="dashboard-card empty-card">
+        <h3>Nincs közelgő határidő</h3>
+        <p>A következő 7 napban esedékes ellenőrzések itt jelennek meg.</p>
+      </article>
+    `;
+    clearCountdownTimer();
+    return;
+  }
+
+  elements.dashboardCards.innerHTML = state.dashboardElevators
+    .map((elevator) => {
+      const countdown = calculateCountdown(elevator.nextInspectionDate);
+      const statusClass = countdown.expired ? "danger-chip" : countdown.warning ? "warning-chip" : "success-chip";
+
+      return `
+        <article class="dashboard-card">
+          <div class="card-topline">
+            <span class="status-chip ${statusClass}">${countdown.label}</span>
+            <span class="serial-chip">${escapeHtml(elevator.serialNumber)}</span>
+          </div>
+          <h3>${escapeHtml(elevator.name)}</h3>
+          <p>${escapeHtml(elevator.location)}</p>
+          <p>Legutóbbi állapot: ${humanizeStatus(elevator.lastStatus)}</p>
+          <div class="countdown-box" data-next-date="${elevator.nextInspectionDate}">
+            ${countdown.text}
+          </div>
+          <p class="muted-text">Következő ellenőrzés: ${formatDate(elevator.nextInspectionDate)}</p>
+        </article>
+      `;
+    })
+    .join("");
+
+  clearCountdownTimer();
+  state.countdownIntervalId = window.setInterval(updateCountdownBoxes, 1000);
+}
+
+function renderDevices() {
+  if (!state.devices.length) {
+    elements.deviceList.innerHTML = `
+      <article class="entry-card empty-card">
+        <h3>Még nincs rögzített eszköz</h3>
+        <p>Hozz létre egy új eszközt, majd adj hozzá naplóbejegyzéseket az állapot frissítéséhez.</p>
+      </article>
+    `;
+    elements.openLogModalButton.disabled = true;
+    return;
+  }
+
+  elements.openLogModalButton.disabled = false;
+  elements.deviceList.innerHTML = state.devices
+    .map((device) => `
+      <article class="entry-card device-card">
+        <div class="card-topline">
+          <span class="status-chip ${statusClassName(device.lastStatus)}">${humanizeStatus(device.lastStatus)}</span>
+          <span class="serial-chip">${escapeHtml(device.serialNumber)}</span>
+        </div>
+        <h3>${escapeHtml(device.name)}</h3>
+        <p><strong>Helyszín:</strong> ${escapeHtml(device.location)}</p>
+        <p><strong>Útvonal:</strong> ${escapeHtml(device.routeName)}</p>
+        <p><strong>Utolsó ellenőrzés:</strong> ${formatDate(device.lastInspectionDate)}</p>
+        <p><strong>Következő ellenőrzés:</strong> ${formatDate(device.nextInspectionDate)}</p>
+        <p><strong>Ciklus:</strong> ${escapeHtml(device.inspectionIntervalDays)} nap</p>
+        <div class="device-actions">
+          <button class="secondary-button" type="button" data-action="log" data-elevator-id="${device.id}">Új napló</button>
+          <button class="ghost-button" type="button" data-action="edit" data-elevator-id="${device.id}">Szerkesztés</button>
+        </div>
+      </article>
+    `)
+    .join("");
+}
+
+function renderLogElevatorOptions(preferredElevatorId) {
+  if (!state.devices.length) {
+    state.selectedLogElevatorId = null;
+    elements.logElevatorId.innerHTML = `<option value="">Előbb hozz létre egy eszközt</option>`;
+    elements.logElevatorSummary.textContent = "A naplózáshoz előbb egy eszközt kell létrehozni.";
+    return;
+  }
+
+  const fallbackId = preferredElevatorId || state.selectedLogElevatorId || state.devices[0].id;
+  const resolvedId = state.devices.some((device) => device.id === Number(fallbackId)) ? Number(fallbackId) : state.devices[0].id;
+  state.selectedLogElevatorId = resolvedId;
+
+  elements.logElevatorId.innerHTML = state.devices
+    .map(
+      (device) => `
+        <option value="${device.id}" ${device.id === resolvedId ? "selected" : ""}>
+          ${escapeHtml(device.name)} · ${escapeHtml(device.serialNumber)}
+        </option>
+      `
+    )
+    .join("");
+
+  renderSelectedElevatorSummary(resolvedId);
+}
+
+function renderSelectedElevatorSummary(elevatorId) {
+  const device = state.devices.find((entry) => entry.id === Number(elevatorId));
+
+  if (!device) {
+    elements.logElevatorSummary.textContent = "Válassz ki egy eszközt a naplóbejegyzéshez.";
+    return;
+  }
+
+  elements.logElevatorSummary.innerHTML = `
+    <strong>${escapeHtml(device.name)}</strong><br />
+    Gyári szám: ${escapeHtml(device.serialNumber)}<br />
+    Helyszín: ${escapeHtml(device.location)}<br />
+    Utolsó állapot: ${humanizeStatus(device.lastStatus)}<br />
+    Következő ellenőrzés: ${formatDate(device.nextInspectionDate)}
+  `;
+}
+
+function updateCountdownBoxes() {
+  document.querySelectorAll(".countdown-box").forEach((box) => {
+    const countdown = calculateCountdown(box.dataset.nextDate);
+    box.textContent = countdown.text;
+  });
+}
+
+function clearCountdownTimer() {
+  if (state.countdownIntervalId) {
+    window.clearInterval(state.countdownIntervalId);
+    state.countdownIntervalId = null;
+  }
+}
+
+function handlePageShow() {
+  if (state.user) {
+    Promise.allSettled([loadDashboard(), loadDevices()]);
+  }
+}
+
+function handleDeviceListClick(event) {
+  const button = event.target.closest("button[data-action]");
+
+  if (!button) {
+    return;
+  }
+
+  const elevatorId = Number(button.dataset.elevatorId);
+
+  if (button.dataset.action === "log") {
+    openLogModal(elevatorId);
+    return;
+  }
+
+  if (button.dataset.action === "edit") {
+    openDeviceModal(elevatorId);
+  }
+}
+
+function handleLogElevatorChange() {
+  const elevatorId = Number(elements.logElevatorId.value);
+  state.selectedLogElevatorId = Number.isInteger(elevatorId) && elevatorId > 0 ? elevatorId : null;
+  renderSelectedElevatorSummary(state.selectedLogElevatorId);
+
+  const device = getSelectedElevator();
+
+  if (device) {
+    elements.logInspectionIntervalDays.value = device.inspectionIntervalDays || 30;
+    syncLogNextInspectionDate();
+  }
+}
+
+function handleModalBackdropClick(event) {
+  if (event.target === event.currentTarget) {
+    closeActiveModal();
+  }
+}
+
+function handleWindowKeydown(event) {
+  if (event.key === "Escape" && state.activeModal) {
+    closeActiveModal();
+  }
+}
+
+function handleOpenDeviceFromLog() {
+  closeActiveModal();
+  openDeviceModal(null, true);
+}
+
+async function handleDeviceSave(event) {
+  event.preventDefault();
+
+  const elevatorId = Number(elements.deviceEditId.value || 0);
+  const payload = {
+    name: elements.deviceName.value,
+    serialNumber: elements.deviceSerialNumber.value,
+    location: elements.deviceLocation.value,
+    routeName: elements.deviceRouteName.value,
+    status: elements.deviceStatus.value,
+    inspectionIntervalDays: elements.deviceInspectionIntervalDays.value,
+    nextInspectionDate: elements.deviceNextInspectionDate.value || "",
+    lastInspectionDate: elements.deviceForm.dataset.lastInspectionDate || ""
+  };
+
+  try {
+    const response = await apiFetch(elevatorId ? `/api/elevators/${elevatorId}` : "/api/elevators", {
+      method: elevatorId ? "PUT" : "POST",
+      body: JSON.stringify(payload)
+    });
+
+    setFeedback(elements.deviceMessage, response.message, "success");
+    await Promise.allSettled([loadDevices(), loadDashboard()]);
+    closeActiveModal();
+
+    if (elements.deviceForm.dataset.returnToLog === "true" && response.elevator?.id) {
+      openLogModal(response.elevator.id);
+    }
+  } catch (error) {
+    setFeedback(elements.deviceMessage, error.message, "error");
+  }
+}
+
+async function handleLogSave(event) {
+  event.preventDefault();
+
+  const formData = new FormData(elements.logForm);
+
+  try {
+    const response = await apiFetch("/api/logs", {
+      method: "POST",
+      body: formData,
+      isFormData: true
+    });
+
+    setFeedback(elements.logMessage, response.message, "success");
+    await Promise.allSettled([loadDashboard(), loadDevices()]);
+    closeActiveModal();
+  } catch (error) {
+    setFeedback(elements.logMessage, error.message, "error");
+  }
+}
+
+async function logout() {
+  try {
+    const response = await apiFetch("/api/logout", { method: "POST" });
+    window.location.href = response.redirectPath;
+  } catch (_error) {
+    window.location.href = "/bejelentkezes";
+  }
+}
+
+function openDeviceModal(elevatorId = null, returnToLog = false) {
+  const device = state.devices.find((entry) => entry.id === Number(elevatorId));
+  elements.deviceForm.reset();
+  elements.deviceForm.dataset.returnToLog = returnToLog ? "true" : "false";
+  elements.deviceForm.dataset.lastInspectionDate = normalizeDateInput(device?.lastInspectionDate);
+  elements.deviceEditId.value = device?.id || "";
+  elements.deviceRouteName.value = state.user?.routeName || "";
+  elements.deviceInspectionIntervalDays.value = device?.inspectionIntervalDays || 30;
+  elements.deviceStatus.value = device?.lastStatus || "rendben";
+  elements.deviceNextInspectionDate.value = normalizeDateInput(device?.nextInspectionDate);
+  elements.deviceName.value = device?.name || "";
+  elements.deviceSerialNumber.value = device?.serialNumber || "";
+  elements.deviceLocation.value = device?.location || "";
+  elements.deviceModalTitle.textContent = device ? "Eszköz szerkesztése" : "Új eszköz";
+  elements.deviceModalSubtitle.textContent = device
+    ? "Az eszköz alapadatainak frissítése. Az állapotot naplóbejegyzéssel is módosíthatod."
+    : "Új lift vagy berendezés rögzítése a technikusi útvonalhoz.";
+  setFeedback(elements.deviceMessage, "", "");
+  showModal(elements.deviceModal);
+}
+
+function openLogModal(elevatorId = null) {
+  if (!state.devices.length) {
+    openDeviceModal();
+    setFeedback(elements.deviceMessage, "A naplózáshoz előbb létre kell hoznod egy eszközt.", "error");
+    return;
+  }
+
+  elements.logForm.reset();
+  setFeedback(elements.logMessage, "", "");
+  setToday(elements.logInspectionDate);
+  elements.logStatus.value = "rendben";
+  renderLogElevatorOptions(elevatorId);
+  elements.logElevatorId.value = String(state.selectedLogElevatorId || "");
+  handleLogElevatorChange();
+  showModal(elements.logModal);
+}
+
+function showModal(modalElement) {
+  closeActiveModal();
+  state.activeModal = modalElement;
+  modalElement.classList.remove("hidden");
+  document.body.classList.add("modal-open");
+}
+
+function closeActiveModal() {
+  if (!state.activeModal) {
+    return;
+  }
+
+  state.activeModal.classList.add("hidden");
+  state.activeModal = null;
+  document.body.classList.remove("modal-open");
+}
+
+function getSelectedElevator() {
+  return state.devices.find((device) => device.id === Number(state.selectedLogElevatorId)) || null;
+}
+
+async function apiFetch(url, options = {}) {
+  const headers = options.isFormData ? {} : { "Content-Type": "application/json" };
+  const response = await fetch(url, {
+    method: options.method || "GET",
+    credentials: "include",
+    headers,
+    body: options.body
+  });
+
+  const contentType = response.headers.get("content-type") || "";
+  const data = contentType.includes("application/json")
+    ? await response.json()
+    : { message: "A szerver nem JSON választ adott vissza." };
+
+  if (!response.ok) {
+    const error = new Error(data.message || "A kérés nem sikerült.");
+    error.status = response.status;
+    throw error;
+  }
+
+  return data;
+}
+
+function syncLogNextInspectionDate() {
+  const inspectionDate = elements.logInspectionDate.value;
+  const intervalDays = Number(elements.logInspectionIntervalDays.value || 30);
+
+  if (!inspectionDate) {
+    return;
+  }
+
+  const baseDate = new Date(`${inspectionDate}T00:00:00`);
+  baseDate.setDate(baseDate.getDate() + intervalDays);
+  elements.logNextInspectionDate.value = baseDate.toISOString().slice(0, 10);
+}
+
+function setToday(element) {
+  element.value = new Date().toISOString().slice(0, 10);
+}
+
+function calculateCountdown(nextInspectionDate) {
+  const normalizedDate = normalizeDateInput(nextInspectionDate);
+
+  if (!normalizedDate) {
+    return {
+      expired: false,
+      warning: false,
+      label: "Nincs dátum",
+      text: "Nincs megadott határidő"
+    };
+  }
+
+  const targetTime = new Date(`${normalizedDate}T23:59:59`).getTime();
+  const diff = targetTime - Date.now();
+  const expired = diff < 0;
+  const absoluteDiff = Math.abs(diff);
+  const totalHours = Math.floor(absoluteDiff / (1000 * 60 * 60));
+  const days = Math.floor(totalHours / 24);
+  const hours = totalHours % 24;
+  const warning = !expired && days <= 7;
+  const label = expired ? "Lejárt" : warning ? "Hamarosan esedékes" : "Rendben";
+  const prefix = expired ? "Túllépés" : "Hátralévő idő";
+
+  return {
+    expired,
+    warning,
+    label,
+    text: `${prefix}: ${days} nap ${hours} óra`
+  };
+}
+
+function humanizeStatus(status) {
+  return status === "rendben" ? "Rendben" : status === "figyelmeztetes" ? "Figyelmeztetés" : "Lejárt";
+}
+
+function statusClassName(status) {
+  return status === "rendben" ? "success-chip" : status === "figyelmeztetes" ? "warning-chip" : "danger-chip";
+}
+
+function formatDate(value) {
+  const normalizedDate = normalizeDateInput(value);
+  return normalizedDate ? new Date(`${normalizedDate}T00:00:00`).toLocaleDateString("hu-HU") : "Nincs dátum";
+}
+
+function normalizeDateInput(value) {
+  if (!value) {
+    return "";
+  }
+
+  if (typeof value === "string") {
+    return value.includes("T") ? value.slice(0, 10) : value;
+  }
+
+  const parsedDate = new Date(value);
+  return Number.isNaN(parsedDate.getTime()) ? "" : parsedDate.toISOString().slice(0, 10);
+}
+
+function setFeedback(element, message, type) {
+  element.textContent = message;
+  element.className = `feedback-text ${type ? `feedback-${type}` : ""}`;
+}
+
+function escapeHtml(value) {
+  return String(value)
+    .replaceAll("&", "&amp;")
+    .replaceAll("<", "&lt;")
+    .replaceAll(">", "&gt;")
+    .replaceAll('"', "&quot;")
+    .replaceAll("'", "&#39;");
+}
diff --git a/public/auth.js b/public/auth.js
new file mode 100644
index 0000000..1fe31e6
--- /dev/null
+++ b/public/auth.js
@@ -0,0 +1,42 @@
+const form = document.getElementById("authForm");
+const feedback = document.getElementById("authMessage");
+const isRegisterPage = window.location.pathname === "/regisztracio";
+
+form?.addEventListener("submit", handleSubmit);
+
+async function handleSubmit(event) {
+  event.preventDefault();
+
+  const formData = new FormData(form);
+  const payload = Object.fromEntries(formData.entries());
+  const endpoint = isRegisterPage ? "/api/register" : "/api/login";
+
+  try {
+    const response = await fetch(endpoint, {
+      method: "POST",
+      credentials: "include",
+      headers: {
+        "Content-Type": "application/json"
+      },
+      body: JSON.stringify(payload)
+    });
+
+    const data = await response.json();
+
+    if (!response.ok) {
+      throw new Error(data.message || "A kérés nem sikerült.");
+    }
+
+    setFeedback(data.message, "success");
+    window.setTimeout(() => {
+      window.location.href = data.redirectPath;
+    }, 500);
+  } catch (error) {
+    setFeedback(error.message, "error");
+  }
+}
+
+function setFeedback(message, type) {
+  feedback.textContent = message;
+  feedback.className = `feedback-text ${type ? `feedback-${type}` : ""}`;
+}
diff --git a/public/index.html b/public/index.html
new file mode 100644
index 0000000..d97a03f
--- /dev/null
+++ b/public/index.html
@@ -0,0 +1,116 @@
+<!DOCTYPE html>
+<html lang="hu">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Csödényi Felvonó Felülvizsgáló | Biztonság és szakértelem</title>
+    <link rel="stylesheet" href="/style.css?v=20260522-3" />
+  </head>
+  <body>
+    <div id="pageShell">
+      <header id="siteHeader" class="panel landing-header">
+        <a class="brand-block brand-link" href="/">
+          <img class="brand-logo" src="/logo.png" alt="Csödényi Felvonó Felülvizsgáló logó" />
+          <div class="brand-copy">
+            <p class="brand-name">Csödényi Felvonó Felülvizsgáló</p>
+            <p class="brand-subtitle">Időszakos vizsgálatok, biztonságtechnikai ellenőrzések és szakértői támogatás.</p>
+          </div>
+        </a>
+        <nav class="top-nav" aria-label="Fő navigáció">
+          <a class="nav-link landing-login-link" href="/bejelentkezes">Technikusi belépés</a>
+        </nav>
+      </header>
+
+      <main id="mainLayout" class="landing-layout">
+        <section class="landing-hero panel">
+          <div class="landing-hero-copy">
+            <p class="landing-kicker">Felvonó-felülvizsgálat kompromisszumok nélkül</p>
+            <h1 id="mainTitle" class="landing-title">Biztonság és szakértelem a legfelsőbb szinteken</h1>
+            <p id="heroText" class="landing-lead">
+              A lift nem pusztán kényelmi eszköz, hanem a mindennapi biztonság és a zavartalan közlekedés alapja.
+              A Csödényi Felvonó Felülvizsgálónál azért dolgozunk, hogy az Ön épületében üzemelő felvonók
+              megbízhatóan, szabályosan és kiszámíthatóan működjenek.
+            </p>
+            <p class="landing-lead">
+              Több éves szakmai tapasztalattal, naprakész jogszabályi ismeretekkel és korszerű diagnosztikai
+              eszközökkel végezzük személy- és teherfelvonók időszakos vizsgálatát, biztonságtechnikai ellenőrzését
+              és üzembe helyezés előtti felülvizsgálatát.
+            </p>
+          </div>
+          <img class="landing-hero-logo" src="/logo.png" alt="Csödényi Felvonó Felülvizsgáló logó" />
+        </section>
+
+        <section class="panel">
+          <div class="panel-head">
+            <div class="section-heading">
+              <h2>Miért minket válasszon?</h2>
+              <p>Megbízható partner társasházak, irodaházak és ipari létesítmények számára.</p>
+            </div>
+          </div>
+
+          <div class="landing-feature-grid">
+            <article class="landing-feature-card">
+              <h3>Maximális precizitás</h3>
+              <p>A biztonság területén nem ismerünk kompromisszumot: minden ellenőrzést részletesen, dokumentáltan végzünk el.</p>
+            </article>
+            <article class="landing-feature-card">
+              <h3>Gyors és rugalmas ügyintézés</h3>
+              <p>Az épület működéséhez igazodunk, hogy a vizsgálatok a lehető legkevesebb fennakadással járjanak.</p>
+            </article>
+            <article class="landing-feature-card">
+              <h3>Teljes körű dokumentáció</h3>
+              <p>Átlátható, hatósági előírásoknak megfelelő jegyzőkönyveket és jól követhető szakmai összefoglalókat adunk át.</p>
+            </article>
+          </div>
+        </section>
+
+        <section class="panel">
+          <div class="panel-head">
+            <div class="section-heading">
+              <h2>Miben állunk rendelkezésére?</h2>
+              <p>Röviden összefoglaltuk, hogyan tudjuk támogatni az üzemeltetőket és közös képviselőket.</p>
+            </div>
+          </div>
+
+          <div class="landing-service-list">
+            <article class="landing-service-item">
+              <h3>Törvényi előírás szerinti időszakos ellenőrzések</h3>
+              <p>Negyedéves, féléves és éves biztonságtechnikai felülvizsgálatok a jogszabályi megfelelés érdekében.</p>
+            </article>
+            <article class="landing-service-item">
+              <h3>Üzembe helyezés előtti vizsgálat</h3>
+              <p>Új vagy modernizált liftek hatósági átadásának szakértői előkészítése és támogatása.</p>
+            </article>
+            <article class="landing-service-item">
+              <h3>Kockázatértékelés és állapotfelmérés</h3>
+              <p>Részletes műszaki helyzetkép, javítási javaslatokkal és korszerűsítési irányokkal.</p>
+            </article>
+            <article class="landing-service-item">
+              <h3>Szakértői tanácsadás</h3>
+              <p>Segítség közös képviselőknek, üzemeltetőknek és cégvezetőknek a vonatkozó szabványok és követelmények értelmezésében.</p>
+            </article>
+          </div>
+        </section>
+
+        <section class="landing-cta panel">
+          <div class="section-heading">
+            <h2>Közeleg a kötelező felülvizsgálat?</h2>
+            <p>
+              A biztonságos liftüzemeltetés és a szabályozások betartása komoly felelősség. Ne hagyja az utolsó
+              pillanatra a vizsgálat megszervezését.
+            </p>
+          </div>
+          <p class="landing-cta-text">
+            A Csödényi Felvonó Felülvizsgáló gyorsan, pontosan és a hatályos előírások szigorú követésével dolgozik,
+            hogy a működés zavartalan, a dokumentáció pedig kifogástalan legyen.
+          </p>
+          <div class="landing-contact-row">
+            <span>Telefon: +36 30 123 4567</span>
+            <span>E-mail: info@csodenyifelulvizsgalo.hu</span>
+            <span>Webalkalmazás: technikusok részére</span>
+          </div>
+        </section>
+      </main>
+    </div>
+  </body>
+</html>
diff --git a/public/login.html b/public/login.html
new file mode 100644
index 0000000..96222ac
--- /dev/null
+++ b/public/login.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<html lang="hu">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Bejelentkezés | LiftEllenőr</title>
+    <link rel="stylesheet" href="/style.css?v=20260522-3" />
+  </head>
+  <body>
+    <div id="pageShell">
+      <header id="siteHeader" class="panel">
+        <a class="brand-block brand-link" href="/">
+          <img class="brand-logo" src="/logo.png" alt="Csödényi Felvonó Felülvizsgáló logó" />
+          <div class="brand-copy">
+            <p class="brand-name">LiftEllenőr</p>
+            <p class="brand-subtitle">Technikusi hozzáférés és vizsgálati naplózás.</p>
+          </div>
+        </a>
+        <nav class="top-nav" aria-label="Fő navigáció">
+          <a class="nav-link" href="/">Főoldal</a>
+          <a class="nav-link nav-link-active" href="/bejelentkezes">Bejelentkezés</a>
+          <a class="nav-link" href="/regisztracio">Regisztráció</a>
+        </nav>
+      </header>
+
+      <main id="mainLayout">
+        <section class="panel auth-panel">
+          <div class="section-heading">
+            <h1 class="page-title">Bejelentkezés</h1>
+            <p class="page-text">A rendszer használatához jelentkezz be a felhasználói adataiddal.</p>
+          </div>
+
+          <form id="authForm" class="auth-form">
+            <label for="username">Felhasználónév</label>
+            <input id="username" name="username" type="text" autocomplete="username" required />
+
+            <label for="password">Jelszó</label>
+            <input id="password" name="password" type="password" autocomplete="current-password" required />
+
+            <button class="primary-button" type="submit">Bejelentkezés</button>
+          </form>
+
+          <p id="authMessage" class="feedback-text"></p>
+          <p class="auth-link-row">Nincs még hozzáférésed? <a href="/regisztracio">Regisztráció</a></p>
+        </section>
+      </main>
+    </div>
+
+    <script src="/auth.js?v=20260522-1"></script>
+  </body>
+</html>
diff --git a/public/logo.png b/public/logo.png
new file mode 100644
index 0000000..c0f29e5
Binary files /dev/null and b/public/logo.png differ
diff --git a/public/logs.html b/public/logs.html
new file mode 100644
index 0000000..4f24755
--- /dev/null
+++ b/public/logs.html
@@ -0,0 +1,60 @@
+<!DOCTYPE html>
+<html lang="hu">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Napló | LiftEllenőr</title>
+    <link rel="stylesheet" href="/style.css?v=20260522-5" />
+  </head>
+  <body>
+    <div id="pageShell">
+      <main id="appShell">
+        <div id="topBar" class="panel app-topbar">
+          <div class="topbar-heading">
+            <img class="topbar-logo" src="/logo.png" alt="" aria-hidden="true" />
+            <div>
+              <h1 id="welcomeText" class="page-title">Napló</h1>
+              <p id="routeText" class="page-text"></p>
+            </div>
+          </div>
+          <div class="panel-actions">
+            <a class="ghost-button" href="/alkalmazas">Vissza az alkalmazáshoz</a>
+            <button id="logoutButton" class="ghost-button" type="button">Kijelentkezés</button>
+          </div>
+        </div>
+
+        <section class="panel">
+          <div class="panel-head">
+            <div class="section-heading">
+              <h2>Bejegyzések</h2>
+              <p>Kereshető és rendezhető ellenőrzési napló a teljes útvonalhoz.</p>
+            </div>
+          </div>
+
+          <div id="entryControls">
+            <div class="field-wrap">
+              <label for="searchInput">Keresés</label>
+              <input id="searchInput" type="text" placeholder="Lift, helyszín, gyári szám, technikus" />
+            </div>
+
+            <div class="field-wrap">
+              <label for="sortSelect">Rendezés</label>
+              <select id="sortSelect">
+                <option value="inspectionDateDesc">Ellenőrzés dátuma szerint csökkenő</option>
+                <option value="inspectionDateAsc">Ellenőrzés dátuma szerint növekvő</option>
+                <option value="nextInspectionAsc">Következő ellenőrzés szerint növekvő</option>
+                <option value="nextInspectionDesc">Következő ellenőrzés szerint csökkenő</option>
+                <option value="elevatorNameAsc">Lift neve szerint</option>
+                <option value="statusAsc">Állapot szerint</option>
+              </select>
+            </div>
+          </div>
+
+          <div id="entriesList" class="entries-grid"></div>
+        </section>
+      </main>
+    </div>
+
+    <script src="/logs.js?v=20260522-5"></script>
+  </body>
+</html>
diff --git a/public/logs.js b/public/logs.js
new file mode 100644
index 0000000..ff612f7
--- /dev/null
+++ b/public/logs.js
@@ -0,0 +1,261 @@
+const state = {
+  user: null,
+  logs: [],
+  logsLoaded: false,
+  initialLogRetryCount: 0,
+  searchActivated: false
+};
+
+const elements = {
+  welcomeText: document.getElementById("welcomeText"),
+  routeText: document.getElementById("routeText"),
+  logoutButton: document.getElementById("logoutButton"),
+  entriesList: document.getElementById("entriesList"),
+  searchInput: document.getElementById("searchInput"),
+  sortSelect: document.getElementById("sortSelect")
+};
+
+bindEvents();
+bootPage();
+
+function bindEvents() {
+  elements.logoutButton.addEventListener("click", logout);
+  elements.searchInput.addEventListener("input", handleSearchInput);
+  elements.sortSelect.addEventListener("change", loadLogs);
+  window.addEventListener("pageshow", handlePageShow);
+}
+
+async function bootPage() {
+  state.logsLoaded = false;
+  state.initialLogRetryCount = 0;
+  state.searchActivated = false;
+  elements.searchInput.value = "";
+  renderLogs();
+
+  try {
+    const response = await apiFetch("/api/me");
+    state.user = response.user;
+    fillUserHeader();
+    await loadLogs(true);
+  } catch (error) {
+    if (error.status === 401) {
+      window.location.href = "/bejelentkezes";
+      return;
+    }
+
+    elements.welcomeText.textContent = "Betöltési hiba";
+    elements.routeText.textContent = "A napló nem tölthető be. Frissítsd az oldalt vagy jelentkezz be újra.";
+    renderError(error.message);
+  }
+}
+
+function fillUserHeader() {
+  const name = state.user?.fullName || "Felhasználó";
+  const route = state.user?.routeName || "Nincs megadva";
+  elements.welcomeText.textContent = "Napló";
+  elements.routeText.textContent = `${name} · Technikusi útvonal: ${route}`;
+}
+
+async function loadLogs(isInitialLoad = false) {
+  try {
+    const sortBy = elements.sortSelect.value || "inspectionDateDesc";
+    const response = await apiFetch(`/api/logs?sortBy=${encodeURIComponent(sortBy)}`);
+
+    state.logs = Array.isArray(response.logs)
+      ? response.logs.map((log) => ({
+          ...log,
+          files: Array.isArray(log.files) ? log.files : []
+        }))
+      : [];
+
+    state.logsLoaded = true;
+    renderLogs();
+
+    if (isInitialLoad && !state.logs.length) {
+      scheduleInitialLogRetry();
+    }
+  } catch (error) {
+    state.logs = [];
+    state.logsLoaded = true;
+    renderError(error.message);
+
+    if (isInitialLoad) {
+      scheduleInitialLogRetry();
+    }
+  }
+}
+
+function renderLogs() {
+  if (!state.logsLoaded) {
+    elements.entriesList.innerHTML = `
+      <article class="entry-card empty-card">
+        <h3>Betöltés</h3>
+        <p>A bejegyzések betöltése folyamatban van.</p>
+      </article>
+    `;
+    return;
+  }
+
+  const query = state.searchActivated ? elements.searchInput.value.trim().toLowerCase() : "";
+  const visibleLogs = state.logs.filter((log) => searchableLog(log).includes(query));
+
+  if (!visibleLogs.length) {
+    elements.entriesList.innerHTML = `
+      <article class="entry-card empty-card">
+        <h3>Nincs találat</h3>
+        <p>Módosítsd a keresést, vagy hozz létre új ellenőrzési bejegyzést az alkalmazás oldalon.</p>
+      </article>
+    `;
+    return;
+  }
+
+  elements.entriesList.innerHTML = visibleLogs
+    .map((log) => {
+      const fileMarkup = log.files.length
+        ? log.files
+            .map(
+              (file) => `
+                <a class="file-link" href="${file.downloadPath}">
+                  ${escapeHtml(file.originalName)}
+                </a>
+              `
+            )
+            .join("")
+        : `<span class="muted-text">Nincs PDF csatolmány</span>`;
+
+      return `
+        <article class="entry-card">
+          <div class="card-topline">
+            <span class="status-chip ${statusClassName(log.status)}">${humanizeStatus(log.status)}</span>
+            <span class="muted-text">${formatDate(log.inspectionDate)}</span>
+          </div>
+          <h3>${escapeHtml(log.elevatorName)}</h3>
+          <p><strong>Gyári szám:</strong> ${escapeHtml(log.serialNumber)}</p>
+          <p><strong>Helyszín:</strong> ${escapeHtml(log.location)}</p>
+          <p><strong>Útvonal:</strong> ${escapeHtml(log.routeName)}</p>
+          <p><strong>Technikus:</strong> ${escapeHtml(log.technicianName)}</p>
+          <p><strong>Következő ellenőrzés:</strong> ${formatDate(log.nextInspectionDate)}</p>
+          <p><strong>Megjegyzés:</strong> ${escapeHtml(log.notes || "Nincs megjegyzés.")}</p>
+          <div class="file-list">${fileMarkup}</div>
+        </article>
+      `;
+    })
+    .join("");
+}
+
+function renderError(message) {
+  elements.entriesList.innerHTML = `
+    <article class="entry-card empty-card">
+      <h3>Hiba</h3>
+      <p>${escapeHtml(message)}</p>
+    </article>
+  `;
+}
+
+function scheduleInitialLogRetry() {
+  if (state.initialLogRetryCount >= 3 || state.logs.length) {
+    return;
+  }
+
+  state.initialLogRetryCount += 1;
+
+  window.setTimeout(() => {
+    state.logsLoaded = false;
+    renderLogs();
+    loadLogs(false);
+  }, 500 * state.initialLogRetryCount);
+}
+
+function handleSearchInput() {
+  state.searchActivated = true;
+  renderLogs();
+}
+
+function handlePageShow() {
+  if (state.user) {
+    state.logsLoaded = false;
+    renderLogs();
+    loadLogs();
+  }
+}
+
+async function logout() {
+  try {
+    const response = await apiFetch("/api/logout", { method: "POST" });
+    window.location.href = response.redirectPath;
+  } catch (_error) {
+    window.location.href = "/bejelentkezes";
+  }
+}
+
+async function apiFetch(url, options = {}) {
+  const headers = options.isFormData ? {} : { "Content-Type": "application/json" };
+  const response = await fetch(url, {
+    method: options.method || "GET",
+    credentials: "include",
+    headers,
+    body: options.body
+  });
+
+  const contentType = response.headers.get("content-type") || "";
+  const data = contentType.includes("application/json")
+    ? await response.json()
+    : { message: "A szerver nem JSON választ adott vissza." };
+
+  if (!response.ok) {
+    const error = new Error(data.message || "A kérés nem sikerült.");
+    error.status = response.status;
+    throw error;
+  }
+
+  return data;
+}
+
+function searchableLog(log) {
+  return [
+    log.elevatorName,
+    log.serialNumber,
+    log.location,
+    log.routeName,
+    log.technicianName,
+    log.status,
+    log.notes
+  ]
+    .join(" ")
+    .toLowerCase();
+}
+
+function humanizeStatus(status) {
+  return status === "rendben" ? "Rendben" : status === "figyelmeztetes" ? "Figyelmeztetés" : "Lejárt";
+}
+
+function statusClassName(status) {
+  return status === "rendben" ? "success-chip" : status === "figyelmeztetes" ? "warning-chip" : "danger-chip";
+}
+
+function formatDate(value) {
+  const normalizedDate = normalizeDateInput(value);
+  return normalizedDate ? new Date(`${normalizedDate}T00:00:00`).toLocaleDateString("hu-HU") : "Nincs dátum";
+}
+
+function normalizeDateInput(value) {
+  if (!value) {
+    return "";
+  }
+
+  if (typeof value === "string") {
+    return value.includes("T") ? value.slice(0, 10) : value;
+  }
+
+  const parsedDate = new Date(value);
+  return Number.isNaN(parsedDate.getTime()) ? "" : parsedDate.toISOString().slice(0, 10);
+}
+
+function escapeHtml(value) {
+  return String(value)
+    .replaceAll("&", "&amp;")
+    .replaceAll("<", "&lt;")
+    .replaceAll(">", "&gt;")
+    .replaceAll('"', "&quot;")
+    .replaceAll("'", "&#39;");
+}
diff --git a/public/register.html b/public/register.html
new file mode 100644
index 0000000..ba09919
--- /dev/null
+++ b/public/register.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<html lang="hu">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Regisztráció | LiftEllenőr</title>
+    <link rel="stylesheet" href="/style.css?v=20260522-3" />
+  </head>
+  <body>
+    <div id="pageShell">
+      <header id="siteHeader" class="panel">
+        <a class="brand-block brand-link" href="/">
+          <img class="brand-logo" src="/logo.png" alt="Csödényi Felvonó Felülvizsgáló logó" />
+          <div class="brand-copy">
+            <p class="brand-name">LiftEllenőr</p>
+            <p class="brand-subtitle">Technikusi hozzáférés és vizsgálati naplózás.</p>
+          </div>
+        </a>
+        <nav class="top-nav" aria-label="Fő navigáció">
+          <a class="nav-link" href="/">Főoldal</a>
+          <a class="nav-link" href="/bejelentkezes">Bejelentkezés</a>
+          <a class="nav-link nav-link-active" href="/regisztracio">Regisztráció</a>
+        </nav>
+      </header>
+
+      <main id="mainLayout">
+        <section class="panel auth-panel">
+          <div class="section-heading">
+            <h1 class="page-title">Regisztráció</h1>
+            <p class="page-text">Új technikusi hozzáférés létrehozása.</p>
+          </div>
+
+          <form id="authForm" class="auth-form">
+            <label for="fullName">Teljes név</label>
+            <input id="fullName" name="fullName" type="text" required />
+
+            <label for="routeName">Technikusi útvonal</label>
+            <input id="routeName" name="routeName" type="text" placeholder="Például: Dél-Pest" required />
+
+            <label for="username">Felhasználónév</label>
+            <input id="username" name="username" type="text" autocomplete="username" required />
+
+            <label for="password">Jelszó</label>
+            <input id="password" name="password" type="password" autocomplete="new-password" required />
+
+            <button class="secondary-button" type="submit">Regisztráció mentése</button>
+          </form>
+
+          <p id="authMessage" class="feedback-text"></p>
+          <p class="auth-link-row">Van már fiókod? <a href="/bejelentkezes">Bejelentkezés</a></p>
+        </section>
+      </main>
+    </div>
+
+    <script src="/auth.js?v=20260522-1"></script>
+  </body>
+</html>
diff --git a/public/style.css b/public/style.css
new file mode 100644
index 0000000..08b1a39
--- /dev/null
+++ b/public/style.css
@@ -0,0 +1,788 @@
+:root {
+  --bg: #f3f4f6;
+  --panel: #ffffff;
+  --line: #d9dee7;
+  --line-strong: #c8d0dc;
+  --text: #1f2937;
+  --muted: #6b7280;
+  --accent: #2563eb;
+  --accent-dark: #1d4ed8;
+  --warning: #b45309;
+  --danger: #b91c1c;
+  --success: #15803d;
+  --shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
+  --radius: 12px;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+html {
+  color-scheme: light;
+}
+
+body {
+  margin: 0;
+  font-family: "Segoe UI", Arial, sans-serif;
+  font-size: 15px;
+  line-height: 1.5;
+  color: var(--text);
+  background:
+    radial-gradient(circle at top, rgba(37, 99, 235, 0.08), transparent 28%),
+    linear-gradient(180deg, #f7faff, var(--bg) 18%);
+}
+
+button,
+input,
+select,
+textarea {
+  font: inherit;
+}
+
+button {
+  cursor: pointer;
+  border: 0;
+}
+
+button:disabled {
+  cursor: not-allowed;
+  opacity: 0.6;
+}
+
+input,
+select,
+textarea {
+  width: 100%;
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  padding: 0.75rem 0.85rem;
+  background: #fff;
+  color: var(--text);
+  transition: border-color 0.15s ease, box-shadow 0.15s ease;
+}
+
+input:focus,
+select:focus,
+textarea:focus {
+  outline: none;
+  border-color: var(--accent);
+  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
+}
+
+textarea {
+  resize: vertical;
+}
+
+label {
+  font-size: 0.95rem;
+  font-weight: 600;
+  color: var(--text);
+}
+
+#pageShell {
+  width: min(1180px, calc(100% - 2rem));
+  margin: 0 auto;
+  padding: 1.5rem 0 2.5rem;
+}
+
+#heroText,
+.panel-head p,
+#routeText,
+.muted-text,
+.feedback-text,
+.entry-card p,
+.dashboard-card p,
+.auth-link-row {
+  color: var(--muted);
+}
+
+#mainLayout,
+#appShell {
+  display: grid;
+  gap: 1rem;
+}
+
+.landing-layout {
+  gap: 1.25rem;
+}
+
+.auth-panel {
+  max-width: 560px;
+  margin: 0 auto;
+}
+
+.panel {
+  background: var(--panel);
+  border: 1px solid var(--line);
+  border-radius: var(--radius);
+  padding: 1.25rem;
+  box-shadow: var(--shadow);
+}
+
+.landing-header {
+  position: sticky;
+  top: 1rem;
+  z-index: 2;
+  background:
+    linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(247, 250, 252, 0.98)),
+    var(--panel);
+  backdrop-filter: blur(8px);
+}
+
+#siteHeader {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 1rem;
+  margin-bottom: 1rem;
+  border-color: #d6e2f7;
+  background:
+    linear-gradient(135deg, rgba(239, 245, 255, 0.96), rgba(255, 255, 255, 0.98)),
+    var(--panel);
+}
+
+.brand-block {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.9rem;
+  min-width: 0;
+}
+
+.brand-link {
+  color: inherit;
+  text-decoration: none;
+}
+
+.brand-copy {
+  min-width: 0;
+}
+
+.brand-logo {
+  width: 52px;
+  height: 52px;
+  object-fit: contain;
+  border-radius: 14px;
+  flex: 0 0 auto;
+  background: #fff;
+  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.14);
+}
+
+.brand-name {
+  margin: 0;
+  font-size: 1.1rem;
+  font-weight: 700;
+  color: var(--accent-dark);
+}
+
+.brand-subtitle {
+  margin: 0.15rem 0 0;
+  color: var(--muted);
+  font-size: 0.92rem;
+}
+
+.landing-header .brand-block {
+  gap: 1rem;
+}
+
+.landing-header .brand-copy {
+  display: grid;
+  gap: 0.2rem;
+}
+
+.landing-header .brand-logo {
+  width: 68px;
+  height: 68px;
+  padding: 0.2rem;
+  border-radius: 18px;
+}
+
+.landing-header .brand-name {
+  line-height: 1.15;
+}
+
+.top-nav {
+  display: flex;
+  gap: 0.5rem;
+  flex-wrap: wrap;
+}
+
+.nav-link {
+  display: inline-flex;
+  align-items: center;
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  padding: 0.55rem 0.8rem;
+  color: var(--text);
+  background: #fff;
+  text-decoration: none;
+  font-weight: 600;
+}
+
+.nav-link:hover {
+  background: #f8fafc;
+}
+
+.nav-link-active {
+  border-color: var(--line-strong);
+  background: #eef4ff;
+  color: var(--accent-dark);
+}
+
+.section-heading {
+  display: grid;
+  gap: 0.2rem;
+}
+
+.page-title {
+  margin: 0;
+  font-size: 1.5rem;
+  font-weight: 700;
+}
+
+.landing-kicker {
+  margin: 0 0 0.6rem;
+  color: var(--accent-dark);
+  font-size: 0.84rem;
+  font-weight: 700;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+}
+
+.landing-title {
+  margin: 0;
+  font-size: clamp(2rem, 4vw, 3.4rem);
+  line-height: 1.05;
+  max-width: 12ch;
+}
+
+.landing-lead {
+  margin: 0;
+  font-size: 1.02rem;
+  color: var(--muted);
+  max-width: 68ch;
+}
+
+.page-text {
+  margin: 0;
+  color: var(--muted);
+}
+
+.panel-head {
+  display: flex;
+  justify-content: space-between;
+  gap: 1rem;
+  align-items: flex-start;
+  margin-bottom: 1rem;
+}
+
+.panel-actions,
+.inline-actions,
+.device-actions {
+  display: flex;
+  gap: 0.75rem;
+  flex-wrap: wrap;
+}
+
+.panel-head h2,
+.entry-card h3,
+.dashboard-card h3 {
+  margin: 0;
+}
+
+.panel-head h2 {
+  font-size: 1.15rem;
+}
+
+.tab-button,
+.ghost-button,
+.primary-button,
+.secondary-button {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 8px;
+  padding: 0.7rem 1rem;
+  font-weight: 600;
+  text-decoration: none;
+  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
+}
+
+.tab-button,
+.ghost-button {
+  border: 1px solid var(--line);
+  background: #fff;
+  color: var(--text);
+}
+
+.primary-button {
+  background: var(--accent);
+  color: #fff;
+}
+
+.primary-button:hover {
+  background: var(--accent-dark);
+}
+
+.secondary-button {
+  background: #eef4ff;
+  color: var(--accent-dark);
+  border: 1px solid #cfe0ff;
+}
+
+.secondary-button:hover {
+  background: #e3edff;
+}
+
+.ghost-button:hover,
+.tab-button:hover {
+  background: #f8fafc;
+}
+
+.app-topbar .ghost-button {
+  border-color: #bfd3fb;
+  background: rgba(255, 255, 255, 0.88);
+}
+
+.app-topbar .ghost-button:hover {
+  background: #eff5ff;
+}
+
+.compact-button {
+  padding: 0.55rem 0.8rem;
+  font-size: 0.92rem;
+}
+
+.auth-form,
+#logForm {
+  display: grid;
+  gap: 0.85rem;
+}
+
+#deviceForm {
+  display: grid;
+  gap: 0.85rem;
+}
+
+.hidden {
+  display: none !important;
+}
+
+#topBar {
+  display: flex;
+  justify-content: space-between;
+  gap: 1rem;
+  align-items: center;
+}
+
+.app-topbar {
+  border-color: #cfe0ff;
+  background:
+    linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(255, 255, 255, 0.96) 28%),
+    var(--panel);
+}
+
+.topbar-heading {
+  display: flex;
+  align-items: center;
+  gap: 0.9rem;
+  min-width: 0;
+}
+
+.topbar-logo {
+  width: 50px;
+  height: 50px;
+  object-fit: contain;
+  border-radius: 14px;
+  background: rgba(255, 255, 255, 0.92);
+  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.12);
+  padding: 0.2rem;
+  flex: 0 0 auto;
+}
+
+.landing-hero {
+  display: grid;
+  grid-template-columns: minmax(0, 1.8fr) minmax(240px, 0.8fr);
+  gap: 1rem;
+  align-items: stretch;
+  padding: 1.5rem;
+  background:
+    radial-gradient(circle at top right, rgba(37, 99, 235, 0.1), transparent 32%),
+    linear-gradient(180deg, #ffffff, #f7f9fc);
+}
+
+.landing-hero-copy {
+  display: grid;
+  gap: 1rem;
+}
+
+.landing-hero-logo {
+  width: min(100%, 320px);
+  max-height: 320px;
+  justify-self: center;
+  align-self: center;
+  object-fit: contain;
+  border-radius: 24px;
+  background: rgba(255, 255, 255, 0.92);
+  box-shadow: 0 18px 36px rgba(37, 99, 235, 0.16);
+  padding: 0.6rem;
+}
+
+.hero-sidecard {
+  display: grid;
+  align-content: start;
+  gap: 0.9rem;
+  padding: 1rem;
+  border: 1px solid #dbe4f0;
+  border-radius: 14px;
+  background: linear-gradient(180deg, #eef4ff, #ffffff);
+}
+
+.hero-sidecard-label {
+  margin: 0;
+  font-size: 0.8rem;
+  font-weight: 700;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+  color: var(--accent-dark);
+}
+
+.hero-sidecard-text {
+  margin: 0;
+  color: var(--text);
+  font-weight: 600;
+}
+
+.landing-login-link {
+  padding: 0.45rem 0.75rem;
+  font-size: 0.92rem;
+  border-color: #bfd3fb;
+  color: var(--accent-dark);
+  background: rgba(255, 255, 255, 0.9);
+}
+
+.landing-feature-grid {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  gap: 1rem;
+}
+
+.landing-feature-card,
+.landing-service-item {
+  border: 1px solid var(--line);
+  border-radius: 12px;
+  background: linear-gradient(180deg, #ffffff, #f8fafc);
+}
+
+.landing-feature-card {
+  padding: 1rem;
+}
+
+.landing-feature-card h3,
+.landing-service-item h3 {
+  margin: 0 0 0.55rem;
+}
+
+.landing-feature-card p,
+.landing-service-item p,
+.landing-cta-text {
+  margin: 0;
+  color: var(--muted);
+}
+
+.landing-service-list {
+  display: grid;
+  gap: 0.9rem;
+}
+
+.landing-service-item {
+  padding: 1rem 1rem 1rem 1.15rem;
+  border-left: 4px solid #cfe0ff;
+}
+
+.landing-cta {
+  display: grid;
+  gap: 1rem;
+  background:
+    linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(255, 255, 255, 1) 38%),
+    #fff;
+}
+
+.landing-contact-row {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.75rem 1.25rem;
+  color: var(--text);
+  font-weight: 600;
+}
+
+.dashboard-grid,
+.entries-grid {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  gap: 1rem;
+}
+
+.dashboard-card,
+.entry-card {
+  padding: 1rem;
+  border-radius: 10px;
+  background: #fff;
+  border: 1px solid var(--line);
+  min-height: 100%;
+}
+
+.empty-card {
+  display: grid;
+  place-items: center;
+  text-align: center;
+  min-height: 180px;
+}
+
+.card-topline {
+  display: flex;
+  justify-content: space-between;
+  gap: 0.75rem;
+  align-items: center;
+  margin-bottom: 0.8rem;
+  flex-wrap: wrap;
+}
+
+.status-chip,
+.serial-chip {
+  display: inline-flex;
+  align-items: center;
+  border-radius: 999px;
+  padding: 0.3rem 0.65rem;
+  font-size: 0.82rem;
+  font-weight: 600;
+}
+
+.serial-chip {
+  background: #f3f4f6;
+  color: var(--text);
+}
+
+.success-chip {
+  background: #eaf7ef;
+  color: var(--success);
+}
+
+.warning-chip {
+  background: #fff4e5;
+  color: var(--warning);
+}
+
+.danger-chip {
+  background: #fdecec;
+  color: var(--danger);
+}
+
+.countdown-box {
+  margin: 1rem 0 0.75rem;
+  padding: 0.85rem 0.95rem;
+  border-radius: 8px;
+  background: #f8fafc;
+  border: 1px solid var(--line);
+  font-size: 1rem;
+  font-weight: 700;
+}
+
+.form-grid,
+#entryControls {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 1rem;
+}
+
+#entryControls {
+  margin-bottom: 0.75rem;
+}
+
+.field-wrap {
+  display: grid;
+  gap: 0.45rem;
+}
+
+.readonly-input {
+  background: #f8fafc;
+  color: var(--muted);
+}
+
+.field-wide {
+  grid-column: 1 / -1;
+}
+
+.form-actions {
+  display: flex;
+  justify-content: space-between;
+  gap: 1rem;
+  align-items: center;
+  flex-wrap: wrap;
+  margin-top: 0.5rem;
+}
+
+.feedback-text {
+  min-height: 1.25rem;
+  margin: 0;
+}
+
+.feedback-success {
+  color: var(--success);
+}
+
+.feedback-error {
+  color: var(--danger);
+}
+
+.file-list {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.5rem;
+  margin-top: 0.9rem;
+}
+
+.summary-card {
+  padding: 0.95rem 1rem;
+  border-radius: 10px;
+  border: 1px solid var(--line);
+  background: #f8fafc;
+  color: var(--text);
+  line-height: 1.6;
+}
+
+.device-card {
+  display: grid;
+}
+
+.device-actions {
+  margin-top: 1rem;
+}
+
+.modal-open {
+  overflow: hidden;
+}
+
+.modal-backdrop {
+  position: fixed;
+  inset: 0;
+  z-index: 20;
+  display: grid;
+  place-items: center;
+  padding: 1rem;
+  background: rgba(15, 23, 42, 0.52);
+}
+
+.modal-panel {
+  width: min(760px, 100%);
+  max-height: calc(100vh - 2rem);
+  overflow: auto;
+  border: 1px solid #d6e2f7;
+  border-radius: 16px;
+  background:
+    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 250, 252, 0.98)),
+    #fff;
+  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.24);
+  padding: 1.25rem;
+}
+
+.modal-head {
+  display: flex;
+  justify-content: space-between;
+  align-items: flex-start;
+  gap: 1rem;
+  margin-bottom: 1rem;
+}
+
+.modal-close {
+  flex: 0 0 auto;
+}
+
+.file-link {
+  display: inline-flex;
+  align-items: center;
+  padding: 0.45rem 0.7rem;
+  border-radius: 8px;
+  border: 1px solid var(--line);
+  background: #f8fafc;
+  color: var(--accent-dark);
+  text-decoration: none;
+}
+
+.file-link:hover {
+  background: #eef4ff;
+  border-color: #cfe0ff;
+}
+
+.auth-link-row {
+  margin: 0.4rem 0 0;
+}
+
+.auth-link-row a {
+  color: var(--accent-dark);
+  font-weight: 600;
+  text-decoration: none;
+}
+
+.auth-link-row a:hover {
+  text-decoration: underline;
+}
+
+@media (max-width: 960px) {
+  .landing-hero,
+  .landing-feature-grid,
+  .dashboard-grid,
+  .entries-grid {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+}
+
+@media (max-width: 720px) {
+  #pageShell {
+    width: min(100% - 1rem, 1180px);
+    padding-top: 1rem;
+  }
+
+  #siteHeader,
+  #topBar,
+  .panel-head,
+  .form-actions,
+  .modal-head {
+    display: grid;
+    align-items: start;
+  }
+
+  .brand-block,
+  .topbar-heading {
+    align-items: start;
+  }
+
+  .landing-hero,
+  .landing-feature-grid,
+  .form-grid,
+  #entryControls,
+  .dashboard-grid,
+  .entries-grid {
+    grid-template-columns: 1fr;
+  }
+
+  #mainTitle {
+    max-width: none;
+    font-size: 1.6rem;
+  }
+
+  .landing-title {
+    max-width: none;
+  }
+
+  .landing-hero-logo {
+    width: min(100%, 220px);
+    max-height: 220px;
+  }
+
+  .brand-logo,
+  .topbar-logo {
+    width: 44px;
+    height: 44px;
+  }
+}
diff --git a/scripts/seed.js b/scripts/seed.js
new file mode 100644
index 0000000..bb3dbb1
--- /dev/null
+++ b/scripts/seed.js
@@ -0,0 +1,419 @@
+const bcrypt = require("bcrypt");
+const { Pool } = require("pg");
+
+const DATABASE_URL = process.env.DATABASE_URL || "postgresql://lift_admin:lift_secret@127.0.0.1:5432/lift_manager";
+const SALT_ROUNDS = 10;
+const DEFAULT_PASSWORD = process.env.SEED_PASSWORD || "teszt123";
+const RUN_TOKEN = Date.now().toString(36).slice(-6);
+
+const ROUTES = [
+  "Észak-Buda",
+  "Dél-Buda",
+  "Észak-Pest",
+  "Dél-Pest",
+  "Belváros",
+  "Külváros",
+  "Keleti zóna",
+  "Nyugati zóna"
+];
+
+const FIRST_NAMES = [
+  "Ádám",
+  "Bence",
+  "Csaba",
+  "Dávid",
+  "Erika",
+  "Ferenc",
+  "Gábor",
+  "Hanna",
+  "István",
+  "Judit",
+  "Katalin",
+  "Levente",
+  "Márk",
+  "Noémi",
+  "Orsolya",
+  "Péter",
+  "Réka",
+  "Sándor",
+  "Tamás",
+  "Zoltán"
+];
+
+const LAST_NAMES = [
+  "Kovács",
+  "Szabó",
+  "Tóth",
+  "Nagy",
+  "Varga",
+  "Kiss",
+  "Molnár",
+  "Németh",
+  "Farkas",
+  "Balogh",
+  "Takács",
+  "Juhász"
+];
+
+const STREETS = [
+  "Kossuth Lajos utca",
+  "Rákóczi út",
+  "Bartók Béla út",
+  "Alkotás utca",
+  "Petőfi Sándor utca",
+  "Szent István körút",
+  "Andrássy út",
+  "József Attila utca",
+  "Kerepesi út",
+  "Váci út",
+  "Móricz Zsigmond körtér",
+  "Fehérvári út"
+];
+
+const BUILDING_TYPES = [
+  "Társasház",
+  "Irodaház",
+  "Rendelőintézet",
+  "Szálloda",
+  "Kereskedelmi központ",
+  "Logisztikai csarnok",
+  "Önkormányzati épület",
+  "Parkolóház"
+];
+
+const STATUS_VALUES = ["rendben", "rendben", "rendben", "figyelmeztetes", "lejart"];
+const NOTE_TEMPLATES = [
+  "Rendszeres időszakos ellenőrzés, jelentős eltérés nem tapasztalható.",
+  "Ajtózár finombeállítás javasolt a következő szerviz alkalmával.",
+  "A gépház tiszta, az üzemi paraméterek megfelelő tartományban vannak.",
+  "Kisebb kopás látható a vezetősínek környezetében, megfigyelés javasolt.",
+  "A vészvilágítás működik, a dokumentáció rendben.",
+  "Szintbeállítás megfelelő, utasoldali panasz nem érkezett.",
+  "Biztonsági áramkör ellenőrizve, működés megfelelő.",
+  "Esztétikai sérülések láthatók a fülkében, műszaki hibát nem okoznak."
+];
+
+const pool = new Pool({
+  connectionString: DATABASE_URL
+});
+
+const options = parseArgs(process.argv.slice(2));
+
+main().catch((error) => {
+  console.error("A seed futtatása sikertelen:", error.message);
+  process.exitCode = 1;
+}).finally(async () => {
+  await pool.end();
+});
+
+async function main() {
+  await initializeDatabase();
+
+  if (options.reset) {
+    await resetDatabase();
+  }
+
+  const passwordHash = await bcrypt.hash(DEFAULT_PASSWORD, SALT_ROUNDS);
+  const client = await pool.connect();
+
+  try {
+    await client.query("BEGIN");
+
+    const createdUsers = [];
+    const createdElevators = [];
+    let createdLogs = 0;
+
+    for (let routeIndex = 0; routeIndex < options.routeCount; routeIndex += 1) {
+      const routeName = ROUTES[routeIndex % ROUTES.length];
+
+      for (let userIndex = 0; userIndex < options.usersPerRoute; userIndex += 1) {
+        const user = await createUser(client, routeName, routeIndex, userIndex, passwordHash);
+        createdUsers.push(user);
+      }
+
+      const routeUsers = createdUsers.filter((user) => user.route_name === routeName);
+
+      for (let elevatorIndex = 0; elevatorIndex < options.elevatorsPerRoute; elevatorIndex += 1) {
+        const elevator = await createElevator(client, routeName, routeIndex, elevatorIndex);
+        createdElevators.push(elevator);
+        createdLogs += await createLogsForElevator(client, elevator, routeUsers, elevatorIndex, options.logsPerElevator);
+      }
+    }
+
+    await client.query("COMMIT");
+
+    console.log("Seed kész.");
+    console.log(`Felhasználók: ${createdUsers.length}`);
+    console.log(`Eszközök: ${createdElevators.length}`);
+    console.log(`Naplóbejegyzések: ${createdLogs}`);
+    console.log(`Teszt jelszó: ${DEFAULT_PASSWORD}`);
+  } catch (error) {
+    await client.query("ROLLBACK");
+    throw error;
+  } finally {
+    client.release();
+  }
+}
+
+function parseArgs(args) {
+  const parsed = {
+    reset: args.includes("--reset"),
+    routeCount: 6,
+    usersPerRoute: 3,
+    elevatorsPerRoute: 18,
+    logsPerElevator: 14
+  };
+
+  for (let index = 0; index < args.length; index += 1) {
+    const arg = args[index];
+    const nextValue = args[index + 1];
+
+    if (arg === "--routes") {
+      parsed.routeCount = toPositiveInt(nextValue, parsed.routeCount);
+    }
+
+    if (arg === "--users-per-route") {
+      parsed.usersPerRoute = toPositiveInt(nextValue, parsed.usersPerRoute);
+    }
+
+    if (arg === "--elevators-per-route") {
+      parsed.elevatorsPerRoute = toPositiveInt(nextValue, parsed.elevatorsPerRoute);
+    }
+
+    if (arg === "--logs-per-elevator") {
+      parsed.logsPerElevator = toPositiveInt(nextValue, parsed.logsPerElevator);
+    }
+  }
+
+  return parsed;
+}
+
+function toPositiveInt(value, fallback) {
+  const parsed = Number(value);
+  return Number.isInteger(parsed) && parsed > 0 ? parsed : fallback;
+}
+
+async function initializeDatabase() {
+  await pool.query(`
+    CREATE TABLE IF NOT EXISTS users (
+      id SERIAL PRIMARY KEY,
+      username TEXT NOT NULL UNIQUE,
+      password_hash TEXT NOT NULL,
+      full_name TEXT NOT NULL,
+      route_name TEXT NOT NULL,
+      created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+    );
+
+    CREATE TABLE IF NOT EXISTS elevators (
+      id SERIAL PRIMARY KEY,
+      name TEXT NOT NULL,
+      serial_number TEXT NOT NULL UNIQUE,
+      location TEXT NOT NULL,
+      route_name TEXT NOT NULL,
+      last_inspection_date DATE,
+      next_inspection_date DATE,
+      inspection_interval_days INTEGER NOT NULL DEFAULT 30,
+      last_status TEXT NOT NULL DEFAULT 'rendben',
+      updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+    );
+
+    CREATE TABLE IF NOT EXISTS logs (
+      id SERIAL PRIMARY KEY,
+      elevator_id INTEGER REFERENCES elevators(id) ON DELETE SET NULL,
+      elevator_name TEXT NOT NULL,
+      serial_number TEXT NOT NULL,
+      location TEXT NOT NULL,
+      route_name TEXT NOT NULL,
+      inspection_date DATE NOT NULL,
+      next_inspection_date DATE NOT NULL,
+      inspection_interval_days INTEGER NOT NULL DEFAULT 30,
+      status TEXT NOT NULL,
+      notes TEXT NOT NULL DEFAULT '',
+      technician_name TEXT NOT NULL,
+      created_by_user_id INTEGER REFERENCES users(id) ON DELETE SET NULL,
+      created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+    );
+
+    CREATE TABLE IF NOT EXISTS log_files (
+      id SERIAL PRIMARY KEY,
+      log_id INTEGER NOT NULL REFERENCES logs(id) ON DELETE CASCADE,
+      original_name TEXT NOT NULL,
+      stored_name TEXT NOT NULL,
+      size INTEGER NOT NULL,
+      mime_type TEXT NOT NULL
+    );
+  `);
+
+  await pool.query(`
+    ALTER TABLE logs
+    ADD COLUMN IF NOT EXISTS elevator_id INTEGER REFERENCES elevators(id) ON DELETE SET NULL;
+  `);
+}
+
+async function resetDatabase() {
+  await pool.query(`
+    TRUNCATE TABLE log_files, logs, elevators, users
+    RESTART IDENTITY CASCADE;
+  `);
+}
+
+async function createUser(client, routeName, routeIndex, userIndex, passwordHash) {
+  const firstName = FIRST_NAMES[(routeIndex * 3 + userIndex) % FIRST_NAMES.length];
+  const lastName = LAST_NAMES[(routeIndex * 5 + userIndex) % LAST_NAMES.length];
+  const fullName = `${lastName} ${firstName}`;
+  const username = normalizeUsername(`${lastName}.${firstName}.${routeIndex + 1}.${userIndex + 1}.${RUN_TOKEN}`);
+
+  const result = await client.query(
+    `INSERT INTO users (username, password_hash, full_name, route_name)
+     VALUES ($1, $2, $3, $4)
+     RETURNING id, username, full_name, route_name`,
+    [username, passwordHash, fullName, routeName]
+  );
+
+  return result.rows[0];
+}
+
+async function createElevator(client, routeName, routeIndex, elevatorIndex) {
+  const buildingType = BUILDING_TYPES[(routeIndex + elevatorIndex) % BUILDING_TYPES.length];
+  const street = STREETS[(routeIndex * 7 + elevatorIndex) % STREETS.length];
+  const buildingNumber = 10 + ((routeIndex * 13 + elevatorIndex * 3) % 89);
+  const elevatorName = `${buildingType} ${routeIndex + 1}/${elevatorIndex + 1}. lift`;
+  const serialNumber = buildSerialNumber(routeIndex, elevatorIndex);
+  const location = `Budapest, ${street} ${buildingNumber}.`;
+
+  const result = await client.query(
+    `INSERT INTO elevators (
+       name, serial_number, location, route_name, last_inspection_date,
+       next_inspection_date, inspection_interval_days, last_status
+     )
+     VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
+     RETURNING id, name, serial_number, location, route_name, last_inspection_date,
+               next_inspection_date, inspection_interval_days, last_status, updated_at`,
+    [elevatorName, serialNumber, location, routeName, null, null, 30, "rendben"]
+  );
+
+  return result.rows[0];
+}
+
+async function createLogsForElevator(client, elevator, routeUsers, elevatorIndex, logCount) {
+  const createdLogs = [];
+  const latestLogProfile = buildLatestLogProfile(elevatorIndex);
+
+  for (let logIndex = 0; logIndex < logCount; logIndex += 1) {
+    const isLatestLog = logIndex === logCount - 1;
+    const logProfile = isLatestLog ? latestLogProfile : buildHistoricalLogProfile(elevatorIndex, logIndex);
+    const user = routeUsers[(elevatorIndex + logIndex) % routeUsers.length];
+    const inspectionDate = dateToIso(logProfile.inspectionDate);
+    const nextInspectionDate = dateToIso(logProfile.nextInspectionDate);
+
+    const result = await client.query(
+      `INSERT INTO logs (
+         elevator_id, elevator_name, serial_number, location, route_name, inspection_date,
+         next_inspection_date, inspection_interval_days, status, notes,
+         technician_name, created_by_user_id, created_at
+       )
+       VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13)
+       RETURNING id`,
+      [
+        elevator.id,
+        elevator.name,
+        elevator.serial_number,
+        elevator.location,
+        elevator.route_name,
+        inspectionDate,
+        nextInspectionDate,
+        logProfile.inspectionIntervalDays,
+        logProfile.status,
+        logProfile.notes,
+        user.full_name,
+        user.id,
+        logProfile.createdAt.toISOString()
+      ]
+    );
+
+    createdLogs.push(result.rows[0].id);
+  }
+
+  await client.query(
+    `UPDATE elevators
+     SET last_inspection_date = $1,
+         next_inspection_date = $2,
+         inspection_interval_days = $3,
+         last_status = $4,
+         updated_at = $5
+     WHERE id = $6`,
+    [
+      dateToIso(latestLogProfile.inspectionDate),
+      dateToIso(latestLogProfile.nextInspectionDate),
+      latestLogProfile.inspectionIntervalDays,
+      latestLogProfile.status,
+      latestLogProfile.createdAt.toISOString(),
+      elevator.id
+    ]
+  );
+
+  return createdLogs.length;
+}
+
+function buildLatestLogProfile(elevatorIndex) {
+  const today = startOfToday();
+  const nextInspectionOffset = elevatorIndex % 10;
+  const intervalDays = 30 + ((elevatorIndex % 4) * 15);
+  const inspectionDate = addDays(today, -((elevatorIndex % 18) + 3));
+  const nextInspectionDate = addDays(today, nextInspectionOffset);
+  const status = nextInspectionOffset <= 1 ? "figyelmeztetes" : "rendben";
+
+  return {
+    inspectionDate,
+    nextInspectionDate,
+    inspectionIntervalDays: intervalDays,
+    status,
+    notes: NOTE_TEMPLATES[elevatorIndex % NOTE_TEMPLATES.length],
+    createdAt: new Date(`${dateToIso(inspectionDate)}T09:00:00Z`)
+  };
+}
+
+function buildHistoricalLogProfile(elevatorIndex, logIndex) {
+  const intervalDays = 30 + (((elevatorIndex + logIndex) % 4) * 15);
+  const inspectionDate = addDays(startOfToday(), -((logIndex + 2) * intervalDays));
+  const nextInspectionDate = addDays(inspectionDate, intervalDays);
+  const status = STATUS_VALUES[(elevatorIndex + logIndex) % STATUS_VALUES.length];
+
+  return {
+    inspectionDate,
+    nextInspectionDate,
+    inspectionIntervalDays: intervalDays,
+    status,
+    notes: NOTE_TEMPLATES[(elevatorIndex + logIndex) % NOTE_TEMPLATES.length],
+    createdAt: new Date(`${dateToIso(inspectionDate)}T08:30:00Z`)
+  };
+}
+
+function buildSerialNumber(routeIndex, elevatorIndex) {
+  const routePart = String(routeIndex + 1).padStart(2, "0");
+  const elevatorPart = String(elevatorIndex + 1).padStart(3, "0");
+  return `LIFT-${RUN_TOKEN}-${routePart}-${elevatorPart}`;
+}
+
+function normalizeUsername(value) {
+  return value
+    .normalize("NFD")
+    .replaceAll(/[\u0300-\u036f]/g, "")
+    .replaceAll(/[^a-zA-Z0-9.]/g, "")
+    .toLowerCase();
+}
+
+function startOfToday() {
+  const now = new Date();
+  return new Date(Date.UTC(now.getUTCFullYear(), now.getUTCMonth(), now.getUTCDate()));
+}
+
+function addDays(date, days) {
+  const copy = new Date(date.getTime());
+  copy.setUTCDate(copy.getUTCDate() + days);
+  return copy;
+}
+
+function dateToIso(date) {
+  return date.toISOString().slice(0, 10);
+}
diff --git a/server.js b/server.js
new file mode 100644
index 0000000..c521d36
--- /dev/null
+++ b/server.js
@@ -0,0 +1,944 @@
+const express = require("express");
+const bcrypt = require("bcrypt");
+const jwt = require("jsonwebtoken");
+const multer = require("multer");
+const fs = require("fs");
+const path = require("path");
+const crypto = require("crypto");
+const { Pool } = require("pg");
+
+const app = express();
+const PORT = Number(process.env.PORT || 3000);
+const JWT_SECRET = process.env.JWT_SECRET || "elevator-manager-secret";
+const DATABASE_URL = process.env.DATABASE_URL || "postgresql://lift_admin:lift_secret@127.0.0.1:5432/lift_manager";
+const SALT_ROUNDS = 10;
+const MAX_FILES = 8;
+const MAX_FILE_SIZE = 10 * 1024 * 1024;
+const COOKIE_NAME = "liftToken";
+const PUBLIC_DIR = path.join(__dirname, "public");
+const DATA_DIR = path.join(__dirname, "data");
+const UPLOAD_DIR = path.join(__dirname, "uploads");
+const LEGACY_DATA_FILE = path.join(DATA_DIR, "store.json");
+
+const pool = new Pool({
+  connectionString: DATABASE_URL
+});
+
+ensureDirectories();
+
+app.use(express.json());
+app.use(express.urlencoded({ extended: true }));
+app.use(express.static(PUBLIC_DIR));
+
+const storage = multer.diskStorage({
+  destination: (_req, _file, cb) => cb(null, UPLOAD_DIR),
+  filename: (_req, file, cb) => {
+    const extension = path.extname(file.originalname).toLowerCase();
+    cb(null, `${Date.now()}-${crypto.randomUUID()}${extension}`);
+  }
+});
+
+const upload = multer({
+  storage,
+  limits: {
+    fileSize: MAX_FILE_SIZE,
+    files: MAX_FILES
+  },
+  fileFilter: (_req, file, cb) => {
+    const isPdf = file.mimetype === "application/pdf" || path.extname(file.originalname).toLowerCase() === ".pdf";
+    cb(isPdf ? null : new Error("Csak PDF fájl tölthető fel."), isPdf);
+  }
+});
+
+app.get("/", (_req, res) => {
+  res.sendFile(path.join(PUBLIC_DIR, "index.html"));
+});
+
+app.get("/bejelentkezes", requireGuestPage, (_req, res) => {
+  res.sendFile(path.join(PUBLIC_DIR, "login.html"));
+});
+
+app.get("/regisztracio", requireGuestPage, (_req, res) => {
+  res.sendFile(path.join(PUBLIC_DIR, "register.html"));
+});
+
+app.get("/alkalmazas", requirePageAuth, (_req, res) => {
+  res.sendFile(path.join(PUBLIC_DIR, "app.html"));
+});
+
+app.get("/naplo", requirePageAuth, (_req, res) => {
+  res.sendFile(path.join(PUBLIC_DIR, "logs.html"));
+});
+
+app.get("/api/health", async (_req, res) => {
+  const result = await pool.query("SELECT NOW() AS now");
+  res.json({ message: "A rendszer működik.", dbTime: result.rows[0].now });
+});
+
+app.post("/api/register", async (req, res) => {
+  try {
+    const username = req.body.username?.trim().toLowerCase();
+    const password = req.body.password?.trim();
+    const fullName = req.body.fullName?.trim();
+    const routeName = req.body.routeName?.trim();
+
+    if (!username || !password || !fullName || !routeName) {
+      return res.status(400).json({ message: "Minden regisztrációs mező kötelező." });
+    }
+
+    const existingUser = await pool.query("SELECT id FROM users WHERE username = $1", [username]);
+
+    if (existingUser.rowCount) {
+      return res.status(409).json({ message: "Ez a felhasználónév már foglalt." });
+    }
+
+    const passwordHash = await bcrypt.hash(password, SALT_ROUNDS);
+
+    await pool.query(
+      `INSERT INTO users (username, password_hash, full_name, route_name)
+       VALUES ($1, $2, $3, $4)`,
+      [username, passwordHash, fullName, routeName]
+    );
+
+    return res.status(201).json({
+      message: "Sikeres regisztráció. Most már bejelentkezhetsz.",
+      redirectPath: "/bejelentkezes"
+    });
+  } catch (_error) {
+    return res.status(500).json({ message: "Hiba történt a regisztráció során." });
+  }
+});
+
+app.post("/api/login", async (req, res) => {
+  try {
+    const username = req.body.username?.trim().toLowerCase();
+    const password = req.body.password?.trim();
+
+    if (!username || !password) {
+      return res.status(400).json({ message: "Felhasználónév és jelszó kötelező." });
+    }
+
+    const result = await pool.query(
+      `SELECT id, username, password_hash, full_name, route_name
+       FROM users
+       WHERE username = $1`,
+      [username]
+    );
+
+    if (!result.rowCount) {
+      return res.status(401).json({ message: "Hibás bejelentkezési adatok." });
+    }
+
+    const user = mapUserRow(result.rows[0]);
+    const passwordMatches = await bcrypt.compare(password, result.rows[0].password_hash);
+
+    if (!passwordMatches) {
+      return res.status(401).json({ message: "Hibás bejelentkezési adatok." });
+    }
+
+    setAuthCookie(res, createToken(user));
+
+    return res.json({
+      message: "Sikeres bejelentkezés.",
+      redirectPath: "/alkalmazas",
+      user
+    });
+  } catch (_error) {
+    return res.status(500).json({ message: "Hiba történt a bejelentkezés során." });
+  }
+});
+
+app.post("/api/logout", (_req, res) => {
+  clearAuthCookie(res);
+  return res.json({ message: "Sikeres kijelentkezés.", redirectPath: "/bejelentkezes" });
+});
+
+app.get("/api/me", authenticateRequest, (req, res) => {
+  res.json({ user: req.user });
+});
+
+app.get("/api/dashboard", authenticateRequest, async (req, res) => {
+  const result = await pool.query(
+    `SELECT id, name, serial_number, location, route_name, last_inspection_date,
+            next_inspection_date, inspection_interval_days, last_status, updated_at
+     FROM elevators
+     WHERE route_name = $1
+       AND next_inspection_date IS NOT NULL
+       AND next_inspection_date >= CURRENT_DATE
+       AND next_inspection_date <= CURRENT_DATE + INTERVAL '7 days'
+     ORDER BY next_inspection_date ASC NULLS LAST, id DESC`,
+    [req.user.routeName]
+  );
+
+  res.json({
+    routeName: req.user.routeName,
+    elevators: result.rows.map(mapElevatorRow)
+  });
+});
+
+app.get("/api/elevators", authenticateRequest, async (req, res) => {
+  const result = await pool.query(
+    `SELECT id, name, serial_number, location, route_name, last_inspection_date,
+            next_inspection_date, inspection_interval_days, last_status, updated_at
+     FROM elevators
+     WHERE route_name = $1
+     ORDER BY name ASC, id DESC`,
+    [req.user.routeName]
+  );
+
+  res.json({
+    routeName: req.user.routeName,
+    elevators: result.rows.map(mapElevatorRow)
+  });
+});
+
+app.post("/api/elevators", authenticateRequest, async (req, res) => {
+  const payload = normalizeElevatorPayload(req.body, req.user);
+  const validationMessage = validateElevatorPayload(payload);
+
+  if (validationMessage) {
+    return res.status(400).json({ message: validationMessage });
+  }
+
+  const result = await pool.query(
+    `INSERT INTO elevators (
+       name, serial_number, location, route_name, last_inspection_date,
+       next_inspection_date, inspection_interval_days, last_status
+     )
+     VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
+     RETURNING id, name, serial_number, location, route_name, last_inspection_date,
+               next_inspection_date, inspection_interval_days, last_status, updated_at`,
+    [
+      payload.name,
+      payload.serialNumber,
+      payload.location,
+      payload.routeName,
+      payload.lastInspectionDate,
+      payload.nextInspectionDate,
+      payload.inspectionIntervalDays,
+      payload.status
+    ]
+  );
+
+  res.status(201).json({
+    message: "Az eszköz sikeresen létre lett hozva.",
+    elevator: mapElevatorRow(result.rows[0])
+  });
+});
+
+app.put("/api/elevators/:elevatorId", authenticateRequest, async (req, res) => {
+  const elevatorId = Number(req.params.elevatorId);
+
+  if (!Number.isInteger(elevatorId) || elevatorId <= 0) {
+    return res.status(400).json({ message: "Érvénytelen eszközazonosító." });
+  }
+
+  const payload = normalizeElevatorPayload(req.body, req.user);
+  const validationMessage = validateElevatorPayload(payload);
+
+  if (validationMessage) {
+    return res.status(400).json({ message: validationMessage });
+  }
+
+  const result = await pool.query(
+    `UPDATE elevators
+     SET name = $1,
+         serial_number = $2,
+         location = $3,
+         route_name = $4,
+         last_inspection_date = $5,
+         next_inspection_date = $6,
+         inspection_interval_days = $7,
+         last_status = $8,
+         updated_at = NOW()
+     WHERE id = $9 AND route_name = $10
+     RETURNING id, name, serial_number, location, route_name, last_inspection_date,
+               next_inspection_date, inspection_interval_days, last_status, updated_at`,
+    [
+      payload.name,
+      payload.serialNumber,
+      payload.location,
+      payload.routeName,
+      payload.lastInspectionDate,
+      payload.nextInspectionDate,
+      payload.inspectionIntervalDays,
+      payload.status,
+      elevatorId,
+      req.user.routeName
+    ]
+  );
+
+  if (!result.rowCount) {
+    return res.status(404).json({ message: "A keresett eszköz nem található." });
+  }
+
+  res.json({
+    message: "Az eszköz adatai frissültek.",
+    elevator: mapElevatorRow(result.rows[0])
+  });
+});
+
+app.get("/api/logs", authenticateRequest, async (req, res) => {
+  const search = req.query.search?.trim().toLowerCase() || "";
+  const sortBy = req.query.sortBy?.trim() || "inspectionDateDesc";
+  const params = [req.user.routeName];
+  let whereClause = "WHERE l.route_name = $1";
+
+  if (search) {
+    params.push(`%${search}%`);
+    whereClause += ` AND LOWER(CONCAT_WS(' ', l.elevator_name, l.serial_number, l.location, l.route_name, l.technician_name, l.notes, l.status)) LIKE $2`;
+  }
+
+  const result = await pool.query(
+    `SELECT l.id, l.elevator_id, l.elevator_name, l.serial_number, l.location, l.route_name, l.inspection_date,
+            l.next_inspection_date, l.inspection_interval_days, l.status, l.notes,
+            l.technician_name, l.created_by_user_id, l.created_at,
+            COALESCE(
+              JSON_AGG(
+                JSON_BUILD_OBJECT(
+                  'id', lf.id,
+                  'originalName', lf.original_name,
+                  'size', lf.size,
+                  'downloadPath', '/api/logs/' || l.id || '/files/' || lf.id
+                )
+                ORDER BY lf.id
+              ) FILTER (WHERE lf.id IS NOT NULL),
+              '[]'::json
+            ) AS files
+     FROM logs l
+     LEFT JOIN log_files lf ON lf.log_id = l.id
+     ${whereClause}
+     GROUP BY l.id
+     ORDER BY ${buildLogOrder(sortBy)}`,
+    params
+  );
+
+  res.json({ logs: result.rows.map(mapLogRow) });
+});
+
+app.post("/api/logs", authenticateRequest, upload.array("pdfs", MAX_FILES), async (req, res) => {
+  const uploadedFiles = req.files || [];
+  const client = await pool.connect();
+
+  try {
+    const payload = normalizeLogPayload(req.body, req.user);
+    const validationMessage = validateLogPayload(payload);
+
+    if (validationMessage) {
+      removeUploadedFiles(uploadedFiles);
+      return res.status(400).json({ message: validationMessage });
+    }
+
+    await client.query("BEGIN");
+
+    let elevatorRow = null;
+
+    if (payload.elevatorId) {
+      elevatorRow = await findElevatorById(client, payload.elevatorId, req.user.routeName);
+
+      if (!elevatorRow) {
+        removeUploadedFiles(uploadedFiles);
+        return res.status(404).json({ message: "A kiválasztott eszköz nem található." });
+      }
+
+      const updatedElevator = await client.query(
+        `UPDATE elevators
+         SET last_inspection_date = $1,
+             next_inspection_date = $2,
+             inspection_interval_days = $3,
+             last_status = $4,
+             updated_at = NOW()
+         WHERE id = $5
+         RETURNING id, name, serial_number, location, route_name, last_inspection_date,
+                   next_inspection_date, inspection_interval_days, last_status, updated_at`,
+        [
+          payload.inspectionDate,
+          payload.nextInspectionDate,
+          payload.inspectionIntervalDays,
+          payload.status,
+          payload.elevatorId
+        ]
+      );
+
+      elevatorRow = updatedElevator.rows[0];
+    } else {
+      const upsertedElevator = await client.query(
+        `INSERT INTO elevators (
+           name, serial_number, location, route_name, last_inspection_date,
+           next_inspection_date, inspection_interval_days, last_status
+         )
+         VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
+         ON CONFLICT (serial_number)
+         DO UPDATE SET
+           name = EXCLUDED.name,
+           location = EXCLUDED.location,
+           route_name = EXCLUDED.route_name,
+           last_inspection_date = EXCLUDED.last_inspection_date,
+           next_inspection_date = EXCLUDED.next_inspection_date,
+           inspection_interval_days = EXCLUDED.inspection_interval_days,
+           last_status = EXCLUDED.last_status,
+           updated_at = NOW()
+         RETURNING id, name, serial_number, location, route_name, last_inspection_date,
+                   next_inspection_date, inspection_interval_days, last_status, updated_at`,
+        [
+          payload.elevatorName,
+          payload.serialNumber,
+          payload.location,
+          payload.routeName,
+          payload.inspectionDate,
+          payload.nextInspectionDate,
+          payload.inspectionIntervalDays,
+          payload.status
+        ]
+      );
+
+      elevatorRow = upsertedElevator.rows[0];
+    }
+
+    const logInsert = await client.query(
+      `INSERT INTO logs (
+         elevator_id, elevator_name, serial_number, location, route_name, inspection_date,
+         next_inspection_date, inspection_interval_days, status, notes,
+         technician_name, created_by_user_id
+       )
+       VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12)
+       RETURNING id`,
+      [
+        elevatorRow.id,
+        elevatorRow.name,
+        elevatorRow.serial_number,
+        elevatorRow.location,
+        elevatorRow.route_name,
+        payload.inspectionDate,
+        payload.nextInspectionDate,
+        payload.inspectionIntervalDays,
+        payload.status,
+        payload.notes,
+        req.user.fullName,
+        req.user.id
+      ]
+    );
+
+    const logId = logInsert.rows[0].id;
+
+    for (const file of uploadedFiles) {
+      const originalName = normalizeUploadedFilename(file.originalname);
+
+      await client.query(
+        `INSERT INTO log_files (log_id, original_name, stored_name, size, mime_type)
+         VALUES ($1, $2, $3, $4, $5)`,
+        [logId, originalName, file.filename, file.size, file.mimetype]
+      );
+    }
+
+    await client.query("COMMIT");
+
+    res.status(201).json({
+      message: "Az ellenőrzési bejegyzés sikeresen mentve lett.",
+      log: await fetchLogById(logId)
+    });
+  } catch (_error) {
+    await client.query("ROLLBACK");
+    removeUploadedFiles(uploadedFiles);
+    res.status(500).json({ message: "Hiba történt a bejegyzés mentése közben." });
+  } finally {
+    client.release();
+  }
+});
+
+app.get("/api/logs/:logId/files/:fileId", authenticateRequest, async (req, res) => {
+  const logId = Number(req.params.logId);
+  const fileId = Number(req.params.fileId);
+  const result = await pool.query(
+    `SELECT stored_name, original_name
+     FROM log_files
+     WHERE id = $1 AND log_id = $2`,
+    [fileId, logId]
+  );
+
+  if (!result.rowCount) {
+    return res.status(404).json({ message: "A keresett fájl nem található." });
+  }
+
+  const file = result.rows[0];
+  const absolutePath = path.join(UPLOAD_DIR, file.stored_name);
+
+  if (!fs.existsSync(absolutePath)) {
+    return res.status(404).json({ message: "A fájl már nem érhető el." });
+  }
+
+  return res.download(absolutePath, normalizeUploadedFilename(file.original_name));
+});
+
+app.use((error, req, res, _next) => {
+  removeUploadedFiles(req.files || []);
+  const isMulterError = error instanceof multer.MulterError;
+  const message = isMulterError
+    ? "A PDF feltöltés sikertelen volt. Ellenőrizd a fájlméretet és a darabszámot."
+    : error.message || "Váratlan szerverhiba történt.";
+
+  res.status(400).json({ message });
+});
+
+startServer();
+
+async function startServer() {
+  try {
+    await initializeDatabase();
+    await migrateLegacyJsonIfNeeded();
+
+    app.listen(PORT, () => {
+      console.log(`A liftellenőrzési kezelő fut a(z) http://localhost:${PORT} címen.`);
+    });
+  } catch (error) {
+    console.error("Nem sikerült elindítani a szervert:", error.message);
+    process.exit(1);
+  }
+}
+
+function ensureDirectories() {
+  [DATA_DIR, UPLOAD_DIR, PUBLIC_DIR].forEach((directory) => {
+    if (!fs.existsSync(directory)) {
+      fs.mkdirSync(directory, { recursive: true });
+    }
+  });
+}
+
+async function initializeDatabase() {
+  await pool.query(`
+    CREATE TABLE IF NOT EXISTS users (
+      id SERIAL PRIMARY KEY,
+      username TEXT NOT NULL UNIQUE,
+      password_hash TEXT NOT NULL,
+      full_name TEXT NOT NULL,
+      route_name TEXT NOT NULL,
+      created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+    );
+
+    CREATE TABLE IF NOT EXISTS elevators (
+      id SERIAL PRIMARY KEY,
+      name TEXT NOT NULL,
+      serial_number TEXT NOT NULL UNIQUE,
+      location TEXT NOT NULL,
+      route_name TEXT NOT NULL,
+      last_inspection_date DATE,
+      next_inspection_date DATE,
+      inspection_interval_days INTEGER NOT NULL DEFAULT 30,
+      last_status TEXT NOT NULL DEFAULT 'rendben',
+      updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+    );
+
+    CREATE TABLE IF NOT EXISTS logs (
+      id SERIAL PRIMARY KEY,
+      elevator_id INTEGER REFERENCES elevators(id) ON DELETE SET NULL,
+      elevator_name TEXT NOT NULL,
+      serial_number TEXT NOT NULL,
+      location TEXT NOT NULL,
+      route_name TEXT NOT NULL,
+      inspection_date DATE NOT NULL,
+      next_inspection_date DATE NOT NULL,
+      inspection_interval_days INTEGER NOT NULL DEFAULT 30,
+      status TEXT NOT NULL,
+      notes TEXT NOT NULL DEFAULT '',
+      technician_name TEXT NOT NULL,
+      created_by_user_id INTEGER REFERENCES users(id) ON DELETE SET NULL,
+      created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+    );
+
+    CREATE TABLE IF NOT EXISTS log_files (
+      id SERIAL PRIMARY KEY,
+      log_id INTEGER NOT NULL REFERENCES logs(id) ON DELETE CASCADE,
+      original_name TEXT NOT NULL,
+      stored_name TEXT NOT NULL,
+      size INTEGER NOT NULL,
+      mime_type TEXT NOT NULL
+    );
+  `);
+
+  await pool.query(`
+    ALTER TABLE logs
+    ADD COLUMN IF NOT EXISTS elevator_id INTEGER REFERENCES elevators(id) ON DELETE SET NULL;
+  `);
+}
+
+async function migrateLegacyJsonIfNeeded() {
+  if (!fs.existsSync(LEGACY_DATA_FILE)) {
+    return;
+  }
+
+  const userCount = await pool.query("SELECT COUNT(*)::int AS count FROM users");
+
+  if (userCount.rows[0].count > 0) {
+    return;
+  }
+
+  const legacy = JSON.parse(fs.readFileSync(LEGACY_DATA_FILE, "utf-8"));
+  const client = await pool.connect();
+  const userIdMap = new Map();
+
+  try {
+    await client.query("BEGIN");
+
+    for (const user of legacy.users || []) {
+      const result = await client.query(
+        `INSERT INTO users (username, password_hash, full_name, route_name, created_at)
+         VALUES ($1, $2, $3, $4, $5)
+         RETURNING id`,
+        [user.username, user.passwordHash, user.fullName, user.routeName, user.createdAt || new Date().toISOString()]
+      );
+      userIdMap.set(user.id, result.rows[0].id);
+    }
+
+    for (const elevator of legacy.elevators || []) {
+      await client.query(
+        `INSERT INTO elevators (
+           name, serial_number, location, route_name, last_inspection_date,
+           next_inspection_date, inspection_interval_days, last_status, updated_at
+         )
+         VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)`,
+        [
+          elevator.name,
+          elevator.serialNumber,
+          elevator.location,
+          elevator.routeName,
+          elevator.lastInspectionDate || null,
+          elevator.nextInspectionDate || null,
+          elevator.inspectionIntervalDays || 30,
+          elevator.lastStatus || "rendben",
+          elevator.updatedAt || new Date().toISOString()
+        ]
+      );
+    }
+
+    for (const log of legacy.logs || []) {
+      const logResult = await client.query(
+        `INSERT INTO logs (
+           elevator_name, serial_number, location, route_name, inspection_date,
+           next_inspection_date, inspection_interval_days, status, notes,
+           technician_name, created_by_user_id, created_at
+         )
+         VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12)
+         RETURNING id`,
+        [
+          log.elevatorName,
+          log.serialNumber,
+          log.location,
+          log.routeName,
+          log.inspectionDate,
+          log.nextInspectionDate,
+          log.inspectionIntervalDays || 30,
+          log.status || "rendben",
+          log.notes || "",
+          log.technicianName,
+          userIdMap.get(log.createdByUserId) || null,
+          log.createdAt || new Date().toISOString()
+        ]
+      );
+
+      for (const file of log.files || []) {
+        await client.query(
+          `INSERT INTO log_files (log_id, original_name, stored_name, size, mime_type)
+           VALUES ($1, $2, $3, $4, $5)`,
+          [logResult.rows[0].id, file.originalName, file.storedName, file.size || 0, file.mimeType || "application/pdf"]
+        );
+      }
+    }
+
+    await client.query("COMMIT");
+  } catch (error) {
+    await client.query("ROLLBACK");
+    throw error;
+  } finally {
+    client.release();
+  }
+}
+
+function createToken(user) {
+  return jwt.sign(user, JWT_SECRET, { expiresIn: "8h" });
+}
+
+function setAuthCookie(res, token) {
+  res.setHeader("Set-Cookie", serializeCookie(COOKIE_NAME, token, {
+    httpOnly: true,
+    sameSite: "Lax",
+    path: "/",
+    maxAge: 8 * 60 * 60
+  }));
+}
+
+function clearAuthCookie(res) {
+  res.setHeader("Set-Cookie", serializeCookie(COOKIE_NAME, "", {
+    httpOnly: true,
+    sameSite: "Lax",
+    path: "/",
+    maxAge: 0
+  }));
+}
+
+function serializeCookie(name, value, options) {
+  const parts = [`${name}=${encodeURIComponent(value)}`];
+  parts.push(`Path=${options.path || "/"}`);
+  parts.push(`Max-Age=${options.maxAge || 0}`);
+  parts.push("HttpOnly");
+  parts.push(`SameSite=${options.sameSite || "Lax"}`);
+  return parts.join("; ");
+}
+
+function parseCookies(req) {
+  const rawCookie = req.headers.cookie || "";
+
+  return rawCookie.split(";").reduce((cookies, entry) => {
+    const [name, ...rest] = entry.trim().split("=");
+
+    if (!name) {
+      return cookies;
+    }
+
+    cookies[name] = decodeURIComponent(rest.join("="));
+    return cookies;
+  }, {});
+}
+
+function getCookieToken(req) {
+  return parseCookies(req)[COOKIE_NAME] || "";
+}
+
+function getTokenFromRequest(req) {
+  const headerToken = req.headers.authorization?.startsWith("Bearer ")
+    ? req.headers.authorization.slice(7)
+    : "";
+  const queryToken = req.query.token?.trim() || "";
+  const cookieToken = getCookieToken(req);
+
+  return headerToken || cookieToken || queryToken;
+}
+
+function verifyToken(token) {
+  try {
+    return jwt.verify(token, JWT_SECRET);
+  } catch (_error) {
+    return null;
+  }
+}
+
+function requireGuestPage(req, res, next) {
+  const token = getCookieToken(req);
+  return token && verifyToken(token) ? res.redirect("/alkalmazas") : next();
+}
+
+function requirePageAuth(req, res, next) {
+  const token = getCookieToken(req);
+  const decoded = token ? verifyToken(token) : null;
+
+  if (!decoded) {
+    return res.redirect("/bejelentkezes");
+  }
+
+  req.user = decoded;
+  next();
+}
+
+function authenticateRequest(req, res, next) {
+  const token = getTokenFromRequest(req);
+  const decoded = token ? verifyToken(token) : null;
+
+  if (!decoded) {
+    return res.status(401).json({ message: "Bejelentkezés szükséges." });
+  }
+
+  req.user = decoded;
+  next();
+}
+
+function normalizeElevatorPayload(body, user) {
+  const inspectionIntervalDays = Number(body.inspectionIntervalDays || 30);
+
+  return {
+    name: body.name?.trim(),
+    serialNumber: body.serialNumber?.trim().toUpperCase(),
+    location: body.location?.trim(),
+    routeName: user.routeName,
+    lastInspectionDate: body.lastInspectionDate?.trim() || null,
+    nextInspectionDate: body.nextInspectionDate?.trim() || null,
+    inspectionIntervalDays: Number.isFinite(inspectionIntervalDays) ? inspectionIntervalDays : 30,
+    status: body.status?.trim() || "rendben"
+  };
+}
+
+function validateElevatorPayload(payload) {
+  if (!payload.name || !payload.serialNumber || !payload.location) {
+    return "Az eszköz neve, gyári száma és helyszíne kötelező.";
+  }
+
+  if (!Number.isInteger(payload.inspectionIntervalDays) || payload.inspectionIntervalDays < 1) {
+    return "Az ellenőrzési ciklusnak legalább 1 napnak kell lennie.";
+  }
+
+  if (!Number.isInteger(payload.inspectionIntervalDays) || payload.inspectionIntervalDays < 1) {
+    return "Az ellenőrzési ciklusnak legalább 1 napnak kell lennie.";
+  }
+
+  return "";
+}
+
+function normalizeLogPayload(body, user) {
+  const inspectionIntervalDays = Number(body.inspectionIntervalDays || 30);
+
+  return {
+    elevatorId: Number(body.elevatorId || 0) || null,
+    elevatorName: body.elevatorName?.trim(),
+    serialNumber: body.serialNumber?.trim().toUpperCase(),
+    location: body.location?.trim(),
+    routeName: body.routeName?.trim() || user.routeName,
+    inspectionDate: body.inspectionDate?.trim(),
+    nextInspectionDate: body.nextInspectionDate?.trim(),
+    inspectionIntervalDays: Number.isFinite(inspectionIntervalDays) ? inspectionIntervalDays : 30,
+    status: body.status?.trim() || "rendben",
+    notes: body.notes?.trim() || ""
+  };
+}
+
+function validateLogPayload(payload) {
+  if (!payload.elevatorId && (!payload.elevatorName || !payload.serialNumber || !payload.location)) {
+    return "A lift neve, gyári száma és helyszíne kötelező.";
+  }
+
+  if (!payload.inspectionDate || !payload.nextInspectionDate) {
+    return "Az ellenőrzés és a következő ellenőrzés dátuma kötelező.";
+  }
+
+  if (!Number.isInteger(payload.inspectionIntervalDays) || payload.inspectionIntervalDays < 1) {
+    return "Az ellenőrzési ciklusnak legalább 1 napnak kell lennie.";
+  }
+
+  return "";
+}
+
+function removeUploadedFiles(files) {
+  files.forEach((file) => {
+    const absolutePath = path.join(UPLOAD_DIR, file.filename);
+
+    if (fs.existsSync(absolutePath)) {
+      fs.unlinkSync(absolutePath);
+    }
+  });
+}
+
+function buildLogOrder(sortBy) {
+  const orderMap = {
+    inspectionDateAsc: "l.inspection_date ASC, l.id DESC",
+    inspectionDateDesc: "l.inspection_date DESC, l.id DESC",
+    nextInspectionAsc: "l.next_inspection_date ASC, l.id DESC",
+    nextInspectionDesc: "l.next_inspection_date DESC, l.id DESC",
+    elevatorNameAsc: "l.elevator_name ASC, l.id DESC",
+    statusAsc: "l.status ASC, l.id DESC"
+  };
+
+  return orderMap[sortBy] || orderMap.inspectionDateDesc;
+}
+
+async function fetchLogById(logId) {
+  const result = await pool.query(
+    `SELECT l.id, l.elevator_id, l.elevator_name, l.serial_number, l.location, l.route_name, l.inspection_date,
+            l.next_inspection_date, l.inspection_interval_days, l.status, l.notes,
+            l.technician_name, l.created_by_user_id, l.created_at,
+            COALESCE(
+              JSON_AGG(
+                JSON_BUILD_OBJECT(
+                  'id', lf.id,
+                  'originalName', lf.original_name,
+                  'size', lf.size,
+                  'downloadPath', '/api/logs/' || l.id || '/files/' || lf.id
+                )
+                ORDER BY lf.id
+              ) FILTER (WHERE lf.id IS NOT NULL),
+              '[]'::json
+            ) AS files
+     FROM logs l
+     LEFT JOIN log_files lf ON lf.log_id = l.id
+     WHERE l.id = $1
+     GROUP BY l.id`,
+    [logId]
+  );
+
+  return result.rowCount ? mapLogRow(result.rows[0]) : null;
+}
+
+async function findElevatorById(executor, elevatorId, routeName) {
+  const result = await executor.query(
+    `SELECT id, name, serial_number, location, route_name, last_inspection_date,
+            next_inspection_date, inspection_interval_days, last_status, updated_at
+     FROM elevators
+     WHERE id = $1 AND route_name = $2`,
+    [elevatorId, routeName]
+  );
+
+  return result.rowCount ? result.rows[0] : null;
+}
+
+function mapUserRow(row) {
+  return {
+    id: row.id,
+    username: row.username,
+    fullName: row.full_name,
+    routeName: row.route_name
+  };
+}
+
+function mapElevatorRow(row) {
+  return {
+    id: row.id,
+    name: row.name,
+    serialNumber: row.serial_number,
+    location: row.location,
+    routeName: row.route_name,
+    lastInspectionDate: row.last_inspection_date,
+    nextInspectionDate: row.next_inspection_date,
+    inspectionIntervalDays: row.inspection_interval_days,
+    lastStatus: row.last_status,
+    updatedAt: row.updated_at
+  };
+}
+
+function mapLogRow(row) {
+  return {
+    id: row.id,
+    elevatorId: row.elevator_id,
+    elevatorName: row.elevator_name,
+    serialNumber: row.serial_number,
+    location: row.location,
+    routeName: row.route_name,
+    inspectionDate: row.inspection_date,
+    nextInspectionDate: row.next_inspection_date,
+    inspectionIntervalDays: row.inspection_interval_days,
+    status: row.status,
+    notes: row.notes,
+    technicianName: row.technician_name,
+    createdByUserId: row.created_by_user_id,
+    createdAt: row.created_at,
+    files: Array.isArray(row.files)
+      ? row.files.map((file) => ({
+          ...file,
+          originalName: normalizeUploadedFilename(file.originalName)
+        }))
+      : []
+  };
+}
+
+function normalizeUploadedFilename(value) {
+  if (!value || !containsLikelyFilenameMojibake(value)) {
+    return value;
+  }
+
+  const decoded = Buffer.from(value, "latin1").toString("utf8").normalize("NFC");
+  return containsReplacementCharacter(decoded) ? value : decoded;
+}
+
+function containsLikelyFilenameMojibake(value) {
+  return /[\u00C2-\u00C5\u00CC-\u00CF\u00D0-\u00D6\u00D8-\u00DE\u0080-\u009F]/.test(value);
+  return /[ÃÅÂ]/.test(value);
+}
+
+function containsReplacementCharacter(value) {
+  return value.includes("\uFFFD");
+}