404 page added

app/not-found.tsx

@@ -0,0 +1,19 @@
+
+const NotFound = () => {
+  return (
+    <div className={`w-full h-96 flex items-center justify-center flex-col`}>
+      <div className={`w-full flex justify-center`}>
+
+      <span className={`text-violet-500 text-6xl sm:text-7xl md:text-9xl font-bold`}>404</span>
+      <span className={`pt-1 sm:pt-2 md:pt-4 font-semibold text-xl sm:text-2xl md:text-3xl`}>Error</span>
+      </div>
+
+      <h1 className={`font-semibold text-3xl sm:text-4xl md:text-6xl text-violet-950 font-mono mt-5 sm:mt-6 md:mt-7 text-center`}>
+      There's nothing here...
+      </h1>
+      <span className={` text-xs mt-3 sm:mt-4 md:mt-5 text-center`}>...maybe the page you're looking for is not found or never existed.</span>
+    </div>
+  );
+};
+
+export default NotFound;