diff --git a/csv_browser.py b/csv_browser.py
index dcacbc7..eaad900 100644
--- a/csv_browser.py
+++ b/csv_browser.py
@@ -1,5 +1,5 @@
 import os
-from flask import Flask, render_template_string, send_from_directory, request
+from flask import Flask, render_template_string, request
 import pandas as pd
 
 EXPORTS_DIR = "exports"
@@ -9,38 +9,61 @@ app = Flask(__name__)
 
 TEMPLATE = """
 <!DOCTYPE html>
-<html>
+<html data-bs-theme="dark">
 <head>
     <meta charset="utf-8">
     <title>CSV Viewer</title>
-    <link rel="stylesheet"
-        href="https://cdn.datatables.net/1.13.4/css/jquery.dataTables.min.css">
-    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
-    <script
-        src="https://cdn.datatables.net/1.13.4/js/jquery.dataTables.min.js"></script>
-</head>
-<body>
-    <h2>📂 CSV Viewer</h2>
-    {% if files %}
-        <ul>
-        {% for file in files %}
-            <li><a href="/view?file={{ file }}">{{ file }}</a></li>
-        {% endfor %}
-        </ul>
-    {% else %}
-        <p>Brak plików w katalogu <code>{{ dir }}</code>.</p>
-    {% endif %}
+    <meta name="viewport" content="width=device-width, initial-scale=1">
 
-    {% if table %}
-        <hr>
-        <h3>Plik: {{ filename }}</h3>
-        {{ table | safe }}
-        <script>
-            $(document).ready(function() {
-                $('#csv-table').DataTable();
-            });
-        </script>
-    {% endif %}
+    <!-- Bootstrap 5 -->
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
+
+    <!-- DataTables -->
+    <link rel="stylesheet" href="https://cdn.datatables.net/1.13.4/css/dataTables.bootstrap5.min.css">
+    <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
+    <script src="https://cdn.datatables.net/1.13.4/js/jquery.dataTables.min.js"></script>
+    <script src="https://cdn.datatables.net/1.13.4/js/dataTables.bootstrap5.min.js"></script>
+
+    <style>
+        body {
+            padding: 2rem;
+        }
+        h2, h3 {
+            margin-bottom: 1rem;
+        }
+    </style>
+</head>
+<body class="bg-body text-body">
+
+    <div class="container">
+        <h2>📊 CSV Viewer</h2>
+
+        {% if files %}
+            <div class="list-group mb-4">
+                {% for file in files %}
+                    <a href="/view?file={{ file }}" class="list-group-item list-group-item-action {% if file == filename %}active{% endif %}">
+                        {{ file }}
+                    </a>
+                {% endfor %}
+            </div>
+        {% else %}
+            <p class="text-warning">Brak plików w katalogu <code>{{ dir }}</code>.</p>
+        {% endif %}
+
+        {% if table %}
+            <hr>
+            <h3 class="mt-4">Plik: {{ filename }}</h3>
+            <div class="table-responsive">
+                {{ table | safe }}
+            </div>
+            <script>
+                $(document).ready(function() {
+                    $('#csv-table').DataTable();
+                });
+            </script>
+        {% endif %}
+    </div>
 </body>
 </html>
 """
@@ -48,7 +71,7 @@ TEMPLATE = """
 @app.route("/")
 def index():
     files = [f for f in os.listdir(EXPORTS_DIR) if f.endswith(".csv")]
-    return render_template_string(TEMPLATE, files=files, table=None, dir=EXPORTS_DIR)
+    return render_template_string(TEMPLATE, files=files, table=None, filename=None, dir=EXPORTS_DIR)
 
 @app.route("/view")
 def view_file():
@@ -61,7 +84,7 @@ def view_file():
 
     try:
         df = pd.read_csv(path)
-        html_table = df.to_html(classes="display", index=False, table_id="csv-table")
+        html_table = df.to_html(classes="table table-striped table-bordered display", index=False, table_id="csv-table")
         files = [f for f in os.listdir(EXPORTS_DIR) if f.endswith(".csv")]
         return render_template_string(TEMPLATE, files=files, table=html_table, filename=filename, dir=EXPORTS_DIR)
     except Exception as e:
