diff --git a/app/__init__.py b/app/__init__.py
new file mode 100644
index 0000000..9df6689
--- /dev/null
+++ b/app/__init__.py
@@ -0,0 +1,8 @@
+from flask import Flask
+from flask_htmx import HTMX
+
+app = Flask(__name__)
+
+htmx = HTMX(app)
+
+from app import routes
diff --git a/app/routes.py b/app/routes.py
new file mode 100644
index 0000000..19683e8
--- /dev/null
+++ b/app/routes.py
@@ -0,0 +1,40 @@
+from flask import render_template, redirect, url_for, current_app
+import os
+from app import app, htmx
+
+
+def render_htmx_or_full(template_partial, template_full):
+    try:
+        if htmx:
+            return render_template(template_partial)
+        return render_template(template_full)
+    except Exception as e:
+        current_app.logger.error(f"Error rendering template: {e}")
+        # Optionally, you can return a custom error page here
+        return "An error occurred", 500
+
+
+@app.route('/')
+def index():
+    return render_htmx_or_full('partials/index.html', 'index.html')
+
+
+@app.route('/buchhaltung')
+def buchhaltung():
+    return render_htmx_or_full('partials/buchhaltung.html', 'index.html')
+
+
+@app.route('/flottenmanagement')
+def flottenmanagement():
+    return render_htmx_or_full('partials/flottenmanagement.html', 'index.html')
+
+
+# Additional debug route to check the file structure
+@app.route('/debug/templates')
+def debug_templates():
+    template_dir = os.path.join(current_app.root_path, 'templates')
+    all_files = []
+    for path, subdirs, files in os.walk(template_dir):
+        for name in files:
+            all_files.append(os.path.join(path, name))
+    return '\n'.join(all_files)