feat: add custom 404 page and update nginx error handling

app/not-found.tsx

@@ -0,0 +1,84 @@
+'use client';
+
+import * as React from 'react';
+import Link from 'next/link';
+import { motion } from 'framer-motion';
+import AnimatedBackground from '@/components/AnimatedBackground';
+import Footer from '@/components/Footer';
+import Logo from '@/components/Logo';
+import { Button } from '@/components/ui/button';
+import { Home } from 'lucide-react';
+
+export default function NotFound() {
+  React.useEffect(() => {
+    // Force dark mode on html element for the 404 page
+    document.documentElement.classList.remove('light');
+    document.documentElement.classList.add('dark');
+  }, []);
+
+  return (
+    <main className="relative min-h-screen dark text-foreground flex flex-col">
+      <AnimatedBackground />
+      
+      <div className="flex-1 flex flex-col items-center justify-center px-4 py-20 relative z-10">
+        <div className="max-w-6xl mx-auto text-center">
+          {/* Logo */}
+          <motion.div
+            className="mb-8 flex justify-center"
+            initial={{ opacity: 0, y: -50 }}
+            animate={{ opacity: 1, y: 0 }}
+            transition={{ duration: 0.8 }}
+          >
+            <Logo size={100} />
+          </motion.div>
+
+          {/* 404 heading */}
+          <motion.h1
+            className="text-7xl md:text-9xl font-bold mb-6 bg-clip-text text-transparent bg-gradient-to-r from-purple-400 via-pink-400 to-cyan-400"
+            initial={{ opacity: 0, y: 20 }}
+            animate={{ opacity: 1, y: 0 }}
+            transition={{ duration: 0.8, delay: 0.2 }}
+          >
+            404
+          </motion.h1>
+
+          {/* Subtitle */}
+          <motion.p
+            className="text-xl md:text-3xl font-medium mb-4"
+            initial={{ opacity: 0, y: 20 }}
+            animate={{ opacity: 1, y: 0 }}
+            transition={{ duration: 0.8, delay: 0.4 }}
+          >
+            Page Not Found
+          </motion.p>
+
+          {/* Description */}
+          <motion.p
+            className="text-base md:text-lg text-muted-foreground/80 mb-12 max-w-md mx-auto"
+            initial={{ opacity: 0, y: 20 }}
+            animate={{ opacity: 1, y: 0 }}
+            transition={{ duration: 0.8, delay: 0.6 }}
+          >
+            The tool or page you are looking for doesn&apos;t exist or has been moved.
+          </motion.p>
+
+          {/* CTA Button */}
+          <motion.div
+            initial={{ opacity: 0, y: 20 }}
+            animate={{ opacity: 1, y: 0 }}
+            transition={{ duration: 0.8, delay: 0.8 }}
+          >
+            <Link href="/">
+              <Button size="lg" className="rounded-full px-8 h-14 text-lg font-semibold bg-gradient-to-r from-purple-500 to-cyan-500 hover:from-purple-600 hover:to-cyan-600 border-none transition-all duration-300">
+                <Home className="mr-2 h-5 w-5" />
+                Back to Home
+              </Button>
+            </Link>
+          </motion.div>
+        </div>
+      </div>
+
+      <Footer />
+    </main>
+  );
+}

nginx.conf

@@ -30,6 +30,11 @@ http {
         root /usr/share/nginx/html;
         index index.html;
 
+        error_page 404 /404.html;
+        location = /404.html {
+            internal;
+        }
+
         # Security headers
         add_header X-Frame-Options "SAMEORIGIN" always;
         add_header X-Content-Type-Options "nosniff" always;