diff --git a/templates/404.html.ep b/templates/404.html.ep
new file mode 100644
index 0000000..db9a086
--- /dev/null
+++ b/templates/404.html.ep
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>404 Not Found</title>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <style>
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+            line-height: 1.6;
+            color: #222;
+            max-width: 600px;
+            margin: 0 auto;
+            padding: 2rem;
+            text-align: center;
+        }
+        h1 {
+            font-size: 3rem;
+            margin-bottom: 0.5rem;
+            color: #444;
+        }
+        p {
+            font-size: 1.1rem;
+            color: #666;
+        }
+    </style>
+</head>
+<body>
+    <h1>404 Not Found</h1>
+    <p>The requested short link was not found.</p>
+</body>
+</html>
