diff --git a/.nojekyll b/.nojekyll
new file mode 100644
index 0000000..e69de29
diff --git a/404.qmd b/404.qmd
new file mode 100644
index 0000000..a40ac5b
--- /dev/null
+++ b/404.qmd
@@ -0,0 +1,24 @@
+---
+title: "Page Not Found"
+page-layout: full
+---
+
+<script>
+// Redirect trailing slash URLs to .html for GitHub Pages compatibility
+(function() {
+  var path = window.location.pathname;
+
+  // If URL ends with trailing slash and it's not the homepage
+  if (path.endsWith('/') && path !== '/') {
+    // Remove trailing slash and add .html
+    var newPath = path.slice(0, -1) + '.html';
+    window.location.replace(newPath);
+  }
+})();
+</script>
+
+## Page Not Found
+
+The page you're looking for doesn't exist. You'll be redirected shortly if this was caused by a trailing slash in the URL.
+
+[Return to homepage](/)
diff --git a/_quarto.yml b/_quarto.yml
index a0ca229..2eb08fc 100644
--- a/_quarto.yml
+++ b/_quarto.yml
@@ -1,6 +1,8 @@
 project:
   type: website
   output-dir: _site
+  resources:
+    - .nojekyll
   render:
     - "*.qmd"
     - "!archetypes/"
@@ -26,15 +28,15 @@ website:
     background: light
     left:
       - text: "Posts"
-        href: posts/index.qmd
+        href: posts
       - text: "TILs"
-        href: til/index.qmd
+        href: til
       - text: "Portfolio"
-        href: portfolio/index.qmd
+        href: portfolio
       - text: "Projects"
-        href: projects/index.qmd
+        href: projects
       - text: "About"
-        href: about/index.qmd
+        href: about
     right:
       - icon: github
         href: https://github.com/olehomelchenko