Update templates/index.html

templates/index.html

@@ -4,6 +4,7 @@
   <meta charset="UTF-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
   <title>Image to PDF Converter</title>
+  <link rel="stylesheet" href="{{ url_for('static', filename='style.css') }}">
   <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
   <script src="{{ url_for('static', filename='script.js') }}"></script>
   <!-- Three.js for the 3D rotating PDF icon in the header -->