feat: improved UI and added dynamic theme toggle

- improved the nav bar components
- added the theme toggle button to toggle theme
- fixed the button background for the nav bar
- fixed the theme color issue to the ThemeToggle funtion
- added more vibrant colors
- fixed the theme logo render

6 files changed, 248 insertions, 89 deletions

diff --git a/frontend/src/components/footer.tsx b/frontend/src/components/footer.tsx
index d7c8ae7..d64167f 100644
--- a/frontend/src/components/footer.tsx
+++ b/frontend/src/components/footer.tsx
@@ -1,24 +1,38 @@
+"use client";
+
+import { useEffect } from "react";
 import Link from "next/link";
 import Image from "next/image";
-import { Input } from "@/components/ui/input";
 import { Button } from "@/components/ui/button";
-import { Separator } from "@/components/ui/separator";
+import { Input } from "@/components/ui/input";
 import {
   Facebook,
   Instagram,
   Twitter,
   Youtube,
-  Mail,
   Phone,
+  Mail,
   MapPin,
-  CreditCard,
-  Shield,
   Truck,
   RefreshCw,
+  Shield,
+  CreditCard,
 } from "lucide-react";
 
 export function Footer() {
-  const currentYear = new Date().getFullYear();
+  // Preload both logo variants
+  useEffect(() => {
+    const preloadLogos = () => {
+      if (typeof window !== 'undefined') {
+        const lightLogo = new window.Image();
+        const darkLogo = new window.Image();
+        lightLogo.src = '/black-logo.png';
+        darkLogo.src = '/white-logo.png';
+      }
+    };
+    
+    preloadLogos();
+  }, []);
 
   const footerLinks = {
     shop: [
@@ -53,25 +67,25 @@ export function Footer() {
   };
 
   return (
-    <footer className="bg-neutral-50 border-t">
+    <footer className="bg-neutral-50 dark:bg-neutral-900 border-t dark:border-neutral-800">
       {/* Newsletter Section */}
-      <div className="bg-black text-white">
+      <div className="bg-black dark:bg-neutral-950 text-white">
         <div className="container mx-auto px-4 py-12">
           <div className="max-w-2xl mx-auto text-center">
             <h2 className="text-2xl font-bold mb-4">Stay in the loop</h2>
-            <p className="text-neutral-300 mb-6">
+            <p className="text-neutral-300 dark:text-neutral-400 mb-6">
               Subscribe to our newsletter and be the first to know about new arrivals, sales, and exclusive offers.
             </p>
             <div className="flex max-w-md mx-auto gap-3">
               <Input
                 placeholder="Enter your email"
-                className="bg-white text-black placeholder:text-gray-500"
+                className="bg-white dark:bg-neutral-800 text-black dark:text-white placeholder:text-gray-500 dark:placeholder:text-gray-400 border-neutral-300 dark:border-neutral-600"
               />
-              <Button variant="secondary" className="px-8">
+              <Button variant="secondary" className="px-8 bg-white dark:bg-neutral-700 text-black dark:text-white hover:bg-neutral-100 dark:hover:bg-neutral-600">
                 Subscribe
               </Button>
             </div>
-            <p className="text-xs text-neutral-400 mt-3">
+            <p className="text-xs text-neutral-400 dark:text-neutral-500 mt-3">
               By subscribing, you agree to our Privacy Policy and Terms of Service.
             </p>
           </div>
@@ -84,12 +98,23 @@ export function Footer() {
           {/* Brand Info */}
           <div className="lg:col-span-2">
             <Link href="/" className="flex items-center space-x-2 mb-4">
+              {/* Light theme logo - visible by default, hidden in dark mode */}
               <Image
                 src="/black-logo.png"
                 alt="blcklst"
                 width={140}
                 height={45}
-                className="h-8 w-auto"
+                className="h-8 w-auto block dark:hidden"
+                priority
+              />
+              {/* Dark theme logo - hidden by default, visible in dark mode */}
+              <Image
+                src="/white-logo.png"
+                alt="blcklst"
+                width={140}
+                height={45}
+                className="h-8 w-auto hidden dark:block"
+                priority
               />
             </Link>
             <p className="text-muted-foreground mb-6 max-w-md">
@@ -98,22 +123,22 @@ export function Footer() {
             
             {/* Contact Info */}
             <div className="space-y-3 mb-6">
-              <div className="flex items-center space-x-3 text-sm">
+              <div className="flex items-center space-x-3 text-sm text-foreground">
                 <Phone className="h-4 w-4 text-muted-foreground" />
                 <span>+1 (555) 123-4567</span>
               </div>
-              <div className="flex items-center space-x-3 text-sm">
+              <div className="flex items-center space-x-3 text-sm text-foreground">
                 <Mail className="h-4 w-4 text-muted-foreground" />
                 <span>[email protected]</span>
               </div>
-              <div className="flex items-center space-x-3 text-sm">
+              <div className="flex items-center space-x-3 text-sm text-foreground">
                 <MapPin className="h-4 w-4 text-muted-foreground" />
                 <span>123 Fashion St, New York, NY 10001</span>
               </div>
             </div>
 
             {/* Social Media */}
-            <div className="flex space-x-4">
+            <div className="flex space-x-4 mb-4">
               <Link href="#" className="text-muted-foreground hover:text-foreground">
                 <Facebook className="h-5 w-5" />
               </Link>
@@ -127,6 +152,28 @@ export function Footer() {
                 <Youtube className="h-5 w-5" />
               </Link>
             </div>
+
+            {/* Made with Love */}
+            <p className="text-xs text-muted-foreground/80 flex items-center">
+              made with ❤️ by{" "}
+              <a 
+                href="https://mavvisuals.gumroad.com" 
+                target="_blank" 
+                rel="noopener noreferrer"
+                className="text-primary/80 hover:text-primary transition-colors mx-1 font-normal"
+              >
+                maanv
+              </a>
+              &{" "}
+              <a 
+                href="https://surgot.in" 
+                target="_blank" 
+                rel="noopener noreferrer"
+                className="text-primary/80 hover:text-primary transition-colors ml-1 font-normal"
+              >
+                surgot
+              </a>
+            </p>
           </div>
 
           {/* Shop Links */}
@@ -225,19 +272,20 @@ export function Footer() {
       </div>
 
       {/* Bottom Footer */}
-      <div className="border-t bg-neutral-100">
+      <div className="border-t dark:border-neutral-800 bg-neutral-100 dark:bg-neutral-800">
         <div className="container mx-auto px-4 py-6">
-          <div className="flex flex-col md:flex-row justify-between items-center space-y-4 md:space-y-0">
-            <div className="flex flex-col md:flex-row items-center space-y-2 md:space-y-0 md:space-x-6">
+          <div className="flex flex-col lg:flex-row justify-between items-center space-y-4 lg:space-y-0 lg:gap-8">
+            {/* Left: Copyright and Legal Links */}
+            <div className="flex flex-col sm:flex-row items-center space-y-2 sm:space-y-0 sm:space-x-6 text-center sm:text-left">
               <p className="text-sm text-muted-foreground">
-                © {currentYear} blcklst. All rights reserved.
+                © {new Date().getFullYear()} blcklst. All rights reserved.
               </p>
               <div className="flex space-x-4">
                 {footerLinks.legal.map((link) => (
                   <Link
                     key={link.name}
                     href={link.href}
-                    className="text-xs text-muted-foreground hover:text-foreground"
+                    className="text-xs text-muted-foreground hover:text-foreground transition-colors"
                   >
                     {link.name}
                   </Link>
@@ -245,14 +293,14 @@ export function Footer() {
               </div>
             </div>
             
-            {/* Payment Methods */}
+            {/* Right: Payment Methods */}
             <div className="flex items-center space-x-2">
               <span className="text-xs text-muted-foreground mr-2">We accept:</span>
               <div className="flex space-x-1">
                 {["Visa", "Mastercard", "AmEx", "PayPal", "Apple Pay"].map((method) => (
                   <div
                     key={method}
-                    className="bg-white border rounded px-2 py-1 text-xs font-medium"
+                    className="bg-white dark:bg-neutral-700 border dark:border-neutral-600 rounded px-2 py-1 text-xs font-medium text-foreground"
                   >
                     {method}
                   </div>
diff --git a/frontend/src/components/header.tsx b/frontend/src/components/header.tsx
index d64061a..851f637 100644
--- a/frontend/src/components/header.tsx
+++ b/frontend/src/components/header.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useState } from "react";
+import { useState, useEffect } from "react";
 import Link from "next/link";
 import Image from "next/image";
 import { Button } from "@/components/ui/button";
@@ -22,7 +22,7 @@ import {
   DropdownMenuTrigger,
 } from "@/components/ui/dropdown-menu";
 import { Sheet, SheetContent, SheetHeader, SheetTitle, SheetTrigger } from "@/components/ui/sheet";
-import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar";
+import { ThemeToggle } from "@/components/theme-toggle";
 import {
   Search,
   ShoppingBag,
@@ -30,7 +30,6 @@ import {
   User,
   Menu,
   Phone,
-  Mail,
   Truck,
   RefreshCw,
   Shield,
@@ -40,7 +39,7 @@ import {
 export function Header() {
   const [cartItems] = useState(3);
   const [wishlistItems] = useState(5);
-
+  
   const categories = [
     {
       title: "Women",
@@ -73,6 +72,20 @@ export function Header() {
     },
   ];
 
+  // Preload both logo variants to ensure smooth loading
+  useEffect(() => {
+    const preloadLogos = () => {
+      if (typeof window !== 'undefined') {
+        const lightLogo = new window.Image();
+        const darkLogo = new window.Image();
+        lightLogo.src = '/black-logo.png';
+        darkLogo.src = '/white-logo.png';
+      }
+    };
+    
+    preloadLogos();
+  }, []);
+
   return (
     <header className="sticky top-0 z-50 w-full bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60">
       {/* Top banner */}
@@ -83,20 +96,24 @@ export function Header() {
       </div>
 
       {/* Announcement bar */}
-      <div className="bg-neutral-100 text-center py-2 px-4">
+      <div className="bg-neutral-100 dark:bg-neutral-800 text-center py-2 px-4">
         <p className="text-sm">
           🔥 <span className="font-semibold">WINTER SALE</span> - Up to 50% off on selected items
         </p>
       </div>
 
       {/* Main header */}
-      <div className="border-b">
+      <div className="border-b dark:border-neutral-800">
         <div className="container mx-auto px-4">
           <div className="flex h-16 items-center justify-between">
             {/* Mobile menu */}
             <Sheet>
               <SheetTrigger asChild>
-                <Button variant="ghost" size="icon" className="md:hidden">
+                <Button 
+                  variant="ghost" 
+                  size="icon" 
+                  className="md:hidden nav-button-transparent backdrop-blur-sm"
+                >
                   <Menu className="h-5 w-5" />
                 </Button>
               </SheetTrigger>
@@ -128,12 +145,22 @@ export function Header() {
             {/* Logo */}
             <div className="flex items-center">
               <Link href="/" className="flex items-center space-x-2">
+                {/* Light theme logo - visible by default, hidden in dark mode */}
                 <Image
                   src="/black-logo.png"
                   alt="blcklst"
                   width={120}
                   height={40}
-                  className="h-8 w-auto"
+                  className="h-8 w-auto block dark:hidden"
+                  priority
+                />
+                {/* Dark theme logo - hidden by default, visible in dark mode */}
+                <Image
+                  src="/white-logo.png"
+                  alt="blcklst"
+                  width={120}
+                  height={40}
+                  className="h-8 w-auto hidden dark:block"
                   priority
                 />
               </Link>
@@ -144,16 +171,18 @@ export function Header() {
               <NavigationMenuList>
                 {categories.map((category) => (
                   <NavigationMenuItem key={category.title}>
-                    <NavigationMenuTrigger className="font-medium">
+                    <NavigationMenuTrigger 
+                      className="font-medium nav-button-transparent backdrop-blur-sm"
+                    >
                       {category.title}
                     </NavigationMenuTrigger>
                     <NavigationMenuContent>
-                      <div className="grid w-[400px] gap-3 p-4 md:w-[500px] md:grid-cols-2 lg:w-[600px]">
+                      <div className="grid w-[400px] gap-3 p-4 md:w-[500px] md:grid-cols-2 lg:w-[600px] nav-dropdown-transparent">
                         {category.items.map((item) => (
                           <NavigationMenuLink key={item.name} asChild>
                             <Link
                               href={item.href}
-                              className="block select-none space-y-1 rounded-md p-3 leading-none no-underline outline-none transition-colors hover:bg-accent hover:text-accent-foreground focus:bg-accent focus:text-accent-foreground"
+                              className="block select-none space-y-1 rounded-md p-3 leading-none no-underline outline-none transition-colors nav-dropdown-item backdrop-blur-sm"
                             >
                               <div className="text-sm font-medium leading-none">{item.name}</div>
                             </Link>
@@ -165,7 +194,7 @@ export function Header() {
                 ))}
                 <NavigationMenuItem>
                   <NavigationMenuLink asChild>
-                    <Link href="/sale" className="font-medium text-red-600 hover:text-red-700">
+                    <Link href="/sale" className="font-medium text-red-600 hover:text-red-700 px-4 py-2 rounded-md nav-button-transparent backdrop-blur-sm transition-colors">
                       Sale
                     </Link>
                   </NavigationMenuLink>
@@ -187,42 +216,57 @@ export function Header() {
             {/* Action buttons */}
             <div className="flex items-center space-x-2">
               {/* Search icon for mobile */}
-              <Button variant="ghost" size="icon" className="lg:hidden">
+              <Button 
+                variant="ghost" 
+                size="icon" 
+                className="lg:hidden nav-button-transparent backdrop-blur-sm"
+              >
                 <Search className="h-5 w-5" />
               </Button>
 
+              {/* Theme toggle */}
+              <ThemeToggle />
+
               {/* User menu */}
               <DropdownMenu>
                 <DropdownMenuTrigger asChild>
-                  <Button variant="ghost" size="icon">
+                  <Button 
+                    variant="ghost" 
+                    size="icon" 
+                    className="nav-button-transparent backdrop-blur-sm"
+                  >
                     <User className="h-5 w-5" />
                   </Button>
                 </DropdownMenuTrigger>
-                <DropdownMenuContent align="end" className="w-56">
-                  <DropdownMenuItem>
+                <DropdownMenuContent align="end" className="w-56 nav-dropdown-transparent">
+                  <DropdownMenuItem className="nav-dropdown-item">
                     <User className="mr-2 h-4 w-4" />
                     My Account
                   </DropdownMenuItem>
-                  <DropdownMenuItem>
+                  <DropdownMenuItem className="nav-dropdown-item">
                     <Truck className="mr-2 h-4 w-4" />
                     Orders
                   </DropdownMenuItem>
-                  <DropdownMenuItem>
+                  <DropdownMenuItem className="nav-dropdown-item">
                     <Heart className="mr-2 h-4 w-4" />
                     Wishlist
                   </DropdownMenuItem>
-                  <DropdownMenuSeparator />
-                  <DropdownMenuItem>
+                  <DropdownMenuSeparator className="bg-white/20 dark:bg-neutral-800/50" />
+                  <DropdownMenuItem className="nav-dropdown-item">
                     Sign In
                   </DropdownMenuItem>
-                  <DropdownMenuItem>
+                  <DropdownMenuItem className="nav-dropdown-item">
                     Create Account
                   </DropdownMenuItem>
                 </DropdownMenuContent>
               </DropdownMenu>
 
               {/* Wishlist */}
-              <Button variant="ghost" size="icon" className="relative">
+              <Button 
+                variant="ghost" 
+                size="icon" 
+                className="relative nav-button-transparent backdrop-blur-sm"
+              >
                 <Heart className="h-5 w-5" />
                 {wishlistItems > 0 && (
                   <Badge className="absolute -top-1 -right-1 h-5 w-5 rounded-full p-0 text-xs">
@@ -232,7 +276,11 @@ export function Header() {
               </Button>
 
               {/* Cart */}
-              <Button variant="ghost" size="icon" className="relative">
+              <Button 
+                variant="ghost" 
+                size="icon" 
+                className="relative nav-button-transparent backdrop-blur-sm"
+              >
                 <ShoppingBag className="h-5 w-5" />
                 {cartItems > 0 && (
                   <Badge className="absolute -top-1 -right-1 h-5 w-5 rounded-full p-0 text-xs">
@@ -244,14 +292,18 @@ export function Header() {
               {/* Language/Currency */}
               <DropdownMenu>
                 <DropdownMenuTrigger asChild>
-                  <Button variant="ghost" size="icon">
+                  <Button 
+                    variant="ghost" 
+                    size="icon" 
+                    className="nav-button-transparent backdrop-blur-sm"
+                  >
                     <Globe className="h-5 w-5" />
                   </Button>
                 </DropdownMenuTrigger>
-                <DropdownMenuContent align="end">
-                  <DropdownMenuItem>🇺🇸 USD</DropdownMenuItem>
-                  <DropdownMenuItem>🇪🇺 EUR</DropdownMenuItem>
-                  <DropdownMenuItem>🇬🇧 GBP</DropdownMenuItem>
+                <DropdownMenuContent align="end" className="nav-dropdown-transparent">
+                  <DropdownMenuItem className="nav-dropdown-item">🇺🇸 USD</DropdownMenuItem>
+                  <DropdownMenuItem className="nav-dropdown-item">🇪🇺 EUR</DropdownMenuItem>
+                  <DropdownMenuItem className="nav-dropdown-item">🇬🇧 GBP</DropdownMenuItem>
                 </DropdownMenuContent>
               </DropdownMenu>
             </div>
@@ -260,7 +312,7 @@ export function Header() {
       </div>
 
       {/* Service features */}
-      <div className="hidden md:block border-b bg-neutral-50">
+      <div className="hidden md:block border-b dark:border-neutral-800 bg-neutral-50 dark:bg-neutral-900">
         <div className="container mx-auto px-4">
           <div className="grid grid-cols-4 gap-4 py-2 text-xs text-muted-foreground">
             <div className="flex items-center justify-center space-x-1">
diff --git a/frontend/src/components/hero-section.tsx b/frontend/src/components/hero-section.tsx
index 2450365..7806cbe 100644
--- a/frontend/src/components/hero-section.tsx
+++ b/frontend/src/components/hero-section.tsx
@@ -7,7 +7,7 @@ import Link from "next/link";
 
 export function HeroSection() {
   return (
-    <section className="relative overflow-hidden bg-gradient-to-br from-neutral-50 via-white to-neutral-100">
+    <section className="relative overflow-hidden bg-gradient-to-br from-neutral-50 via-white to-neutral-100 dark:from-neutral-950 dark:via-neutral-900 dark:to-neutral-800">
       {/* Background decoration */}
       <div className="absolute inset-0 bg-grid-pattern opacity-5"></div>
       <div className="absolute top-20 right-20 w-72 h-72 bg-primary/5 rounded-full blur-3xl"></div>
@@ -89,10 +89,10 @@ export function HeroSection() {
           {/* Right side - Product showcase */}
           <div className="relative">
             {/* Main product image */}
-            <div className="relative bg-gradient-to-br from-neutral-100 to-neutral-200 rounded-2xl p-8 lg:p-12">
-              <div className="aspect-[3/4] bg-gradient-to-br from-neutral-300 to-neutral-400 rounded-xl flex items-center justify-center">
-                <div className="text-center text-neutral-600">
-                  <div className="w-16 h-16 bg-neutral-500 rounded-full mx-auto mb-4 flex items-center justify-center">
+            <div className="relative bg-gradient-to-br from-neutral-100 to-neutral-200 dark:from-neutral-800 dark:to-neutral-700 rounded-2xl p-8 lg:p-12">
+              <div className="aspect-[3/4] bg-gradient-to-br from-neutral-300 to-neutral-400 dark:from-neutral-600 dark:to-neutral-500 rounded-xl flex items-center justify-center">
+                <div className="text-center text-neutral-600 dark:text-neutral-300">
+                  <div className="w-16 h-16 bg-neutral-500 dark:bg-neutral-400 rounded-full mx-auto mb-4 flex items-center justify-center">
                     <Sparkles className="w-8 h-8 text-white" />
                   </div>
                   <p className="font-medium">Featured Product</p>
@@ -107,9 +107,9 @@ export function HeroSection() {
             </div>
 
             {/* Floating product cards */}
-            <div className="absolute -left-6 top-1/4 bg-white rounded-lg shadow-lg p-4 max-w-[200px] border">
+            <div className="absolute -left-6 top-1/4 bg-white dark:bg-neutral-800 rounded-lg shadow-lg p-4 max-w-[200px] border dark:border-neutral-700">
               <div className="flex items-center space-x-3">
-                <div className="w-12 h-12 bg-gradient-to-br from-pink-100 to-pink-200 rounded-lg"></div>
+                <div className="w-12 h-12 bg-gradient-to-br from-pink-100 to-pink-200 dark:from-pink-900 dark:to-pink-800 rounded-lg"></div>
                 <div>
                   <p className="font-medium text-sm">Summer Dress</p>
                   <p className="text-xs text-muted-foreground">$89.99</p>
@@ -121,9 +121,9 @@ export function HeroSection() {
               </div>
             </div>
 
-            <div className="absolute -right-8 bottom-1/4 bg-white rounded-lg shadow-lg p-4 max-w-[200px] border">
+            <div className="absolute -right-8 bottom-1/4 bg-white dark:bg-neutral-800 rounded-lg shadow-lg p-4 max-w-[200px] border dark:border-neutral-700">
               <div className="flex items-center space-x-3">
-                <div className="w-12 h-12 bg-gradient-to-br from-blue-100 to-blue-200 rounded-lg"></div>
+                <div className="w-12 h-12 bg-gradient-to-br from-blue-100 to-blue-200 dark:from-blue-900 dark:to-blue-800 rounded-lg"></div>
                 <div>
                   <p className="font-medium text-sm">Casual Sneakers</p>
                   <p className="text-xs text-muted-foreground">$129.99</p>
@@ -150,7 +150,7 @@ export function HeroSection() {
       {/* Bottom wave */}
       <div className="absolute bottom-0 left-0 right-0">
         <svg
-          className="w-full h-12 fill-white"
+          className="w-full h-12 fill-white dark:fill-neutral-900"
           viewBox="0 0 1200 120"
           preserveAspectRatio="none"
         >
diff --git a/frontend/src/components/product-card.tsx b/frontend/src/components/product-card.tsx
index f790c98..25717f4 100644
--- a/frontend/src/components/product-card.tsx
+++ b/frontend/src/components/product-card.tsx
@@ -71,16 +71,16 @@ export function ProductCard({
 
   return (
     <Card 
-      className="group relative overflow-hidden border-0 shadow-sm hover:shadow-xl transition-all duration-300 cursor-pointer"
+      className="group relative overflow-hidden border-0 shadow-sm hover:shadow-xl dark:shadow-black/30 dark:hover:shadow-black/50 transition-all duration-300 cursor-pointer bg-white dark:bg-neutral-900"
       onMouseEnter={() => setIsHovered(true)}
       onMouseLeave={() => setIsHovered(false)}
     >
       <Link href={`/product/${id}`}>
         <div className="relative overflow-hidden">
           {/* Product Image */}
-          <div className="aspect-[3/4] bg-neutral-100 relative overflow-hidden">
+          <div className="aspect-[3/4] bg-neutral-100 dark:bg-neutral-800 relative overflow-hidden">
             <div 
-              className="w-full h-full bg-gradient-to-br from-neutral-200 to-neutral-300 flex items-center justify-center transition-transform duration-300 group-hover:scale-105"
+              className="w-full h-full bg-gradient-to-br from-neutral-200 to-neutral-300 dark:from-neutral-700 dark:to-neutral-800 flex items-center justify-center transition-transform duration-300 group-hover:scale-105"
               style={{
                 backgroundImage: `url(${allImages[currentImage]})`,
                 backgroundSize: 'cover',
@@ -88,9 +88,9 @@ export function ProductCard({
               }}
             >
               {/* Placeholder for actual images */}
-              <div className="text-center text-neutral-500">
-                <div className="w-16 h-16 bg-neutral-400 rounded-full mx-auto mb-2 flex items-center justify-center">
-                  <ShoppingBag className="w-8 h-8 text-white" />
+              <div className="text-center text-neutral-500 dark:text-neutral-400">
+                <div className="w-16 h-16 bg-neutral-400 dark:bg-neutral-700 rounded-full mx-auto mb-2 flex items-center justify-center">
+                  <ShoppingBag className="w-8 h-8 text-white dark:text-neutral-300" />
                 </div>
                 <p className="text-sm font-medium">{name}</p>
               </div>
@@ -99,12 +99,12 @@ export function ProductCard({
             {/* Badges */}
             <div className="absolute top-3 left-3 flex flex-col gap-2">
               {isNew && (
-                <Badge className="bg-blue-500 hover:bg-blue-600 text-white">
+                <Badge className="bg-blue-600 hover:bg-blue-700 dark:bg-blue-500 dark:hover:bg-blue-600 text-white shadow-lg">
                   New
                 </Badge>
               )}
               {isSale && (
-                <Badge className="bg-red-500 hover:bg-red-600 text-white">
+                <Badge className="bg-red-600 hover:bg-red-700 dark:bg-red-500 dark:hover:bg-red-600 text-white shadow-lg">
                   -{discountPercentage}%
                 </Badge>
               )}
@@ -114,11 +114,11 @@ export function ProductCard({
             <Button
               variant="ghost"
               size="icon"
-              className="absolute top-3 right-3 bg-white/80 hover:bg-white text-gray-600 hover:text-red-500 transition-colors"
+              className="absolute top-3 right-3 bg-white/90 dark:bg-neutral-900/90 hover:bg-white dark:hover:bg-neutral-900 text-gray-600 dark:text-gray-300 hover:text-red-500 dark:hover:text-red-400 transition-colors shadow-lg dark:shadow-black/20"
               onClick={handleWishlistToggle}
             >
               <Heart 
-                className={`h-4 w-4 ${wishlisted ? 'fill-red-500 text-red-500' : ''}`} 
+                className={`h-4 w-4 ${wishlisted ? 'fill-red-500 text-red-500 dark:fill-red-400 dark:text-red-400' : ''}`} 
               />
             </Button>
 
@@ -129,7 +129,7 @@ export function ProductCard({
                   <button
                     key={index}
                     className={`w-2 h-2 rounded-full transition-colors ${
-                      index === currentImage ? 'bg-white' : 'bg-white/50'
+                      index === currentImage ? 'bg-white dark:bg-neutral-300' : 'bg-white/50 dark:bg-neutral-500/50'
                     }`}
                     onClick={(e) => {
                       e.preventDefault();
@@ -142,7 +142,7 @@ export function ProductCard({
             )}
 
             {/* Hover overlay with actions */}
-            <div className={`absolute inset-0 bg-black/20 flex items-center justify-center transition-opacity duration-300 ${
+            <div className={`absolute inset-0 bg-black/30 dark:bg-black/50 flex items-center justify-center transition-opacity duration-300 ${
               isHovered ? 'opacity-100' : 'opacity-0'
             }`}>
               <div className="flex gap-3">
@@ -150,7 +150,7 @@ export function ProductCard({
                   variant="secondary"
                   size="sm"
                   onClick={handleQuickView}
-                  className="bg-white/90 hover:bg-white text-gray-900"
+                  className="bg-white/95 dark:bg-neutral-900/95 hover:bg-white dark:hover:bg-neutral-900 text-gray-900 dark:text-white shadow-lg dark:shadow-black/20"
                 >
                   <Eye className="h-4 w-4 mr-2" />
                   Quick View
@@ -158,7 +158,7 @@ export function ProductCard({
                 <Button
                   size="sm"
                   onClick={handleAddToCart}
-                  className="bg-primary hover:bg-primary/90"
+                  className="bg-primary hover:bg-primary/90 dark:bg-primary dark:hover:bg-primary/90 shadow-lg dark:shadow-black/20"
                 >
                   <ShoppingBag className="h-4 w-4 mr-2" />
                   Add to Cart
@@ -168,14 +168,14 @@ export function ProductCard({
           </div>
 
           {/* Product Info */}
-          <CardContent className="p-4 space-y-3">
+          <CardContent className="p-4 space-y-3 bg-white dark:bg-neutral-900">
             {/* Category */}
-            <p className="text-xs text-muted-foreground uppercase tracking-wide">
+            <p className="text-xs text-muted-foreground dark:text-neutral-500 uppercase tracking-wide">
               {category}
             </p>
 
             {/* Product Name */}
-            <h3 className="font-semibold text-sm leading-tight line-clamp-2 group-hover:text-primary transition-colors">
+            <h3 className="font-semibold text-sm leading-tight line-clamp-2 group-hover:text-primary dark:group-hover:text-primary transition-colors text-foreground dark:text-neutral-100">
               {name}
             </h3>
 
@@ -187,13 +187,13 @@ export function ProductCard({
                     key={star}
                     className={`h-3 w-3 ${
                       star <= rating
-                        ? 'fill-yellow-400 text-yellow-400'
-                        : 'text-gray-300'
+                        ? 'fill-yellow-400 text-yellow-400 dark:fill-yellow-500 dark:text-yellow-500'
+                        : 'text-gray-300 dark:text-neutral-600'
                     }`}
                   />
                 ))}
               </div>
-              <span className="text-xs text-muted-foreground">
+              <span className="text-xs text-muted-foreground dark:text-neutral-500">
                 ({reviewCount})
               </span>
             </div>
@@ -204,12 +204,12 @@ export function ProductCard({
                 {colors.slice(0, 4).map((color, index) => (
                   <div
                     key={index}
-                    className="w-4 h-4 rounded-full border border-gray-300"
+                    className="w-4 h-4 rounded-full border border-gray-300 dark:border-neutral-600"
                     style={{ backgroundColor: color }}
                   />
                 ))}
                 {colors.length > 4 && (
-                  <span className="text-xs text-muted-foreground ml-1">
+                  <span className="text-xs text-muted-foreground dark:text-neutral-500 ml-1">
                     +{colors.length - 4}
                   </span>
                 )}
@@ -218,11 +218,11 @@ export function ProductCard({
 
             {/* Price */}
             <div className="flex items-center gap-2">
-              <span className="font-bold text-lg">
+              <span className="font-bold text-lg text-foreground dark:text-neutral-100">
                 ${price.toFixed(2)}
               </span>
               {originalPrice && (
-                <span className="text-sm text-muted-foreground line-through">
+                <span className="text-sm text-muted-foreground dark:text-neutral-500 line-through">
                   ${originalPrice.toFixed(2)}
                 </span>
               )}
@@ -232,12 +232,12 @@ export function ProductCard({
             {sizes.length > 0 && (
               <div className="flex flex-wrap gap-1">
                 {sizes.slice(0, 4).map((size) => (
-                  <Badge key={size} variant="outline" className="text-xs px-2 py-1">
+                  <Badge key={size} variant="outline" className="text-xs px-2 py-1 border-neutral-300 dark:border-neutral-600 text-neutral-700 dark:text-neutral-300">
                     {size}
                   </Badge>
                 ))}
                 {sizes.length > 4 && (
-                  <Badge variant="outline" className="text-xs px-2 py-1">
+                  <Badge variant="outline" className="text-xs px-2 py-1 border-neutral-300 dark:border-neutral-600 text-neutral-700 dark:text-neutral-300">
                     +{sizes.length - 4}
                   </Badge>
                 )}
diff --git a/frontend/src/components/theme-provider.tsx b/frontend/src/components/theme-provider.tsx
new file mode 100644
index 0000000..220a1f8
--- /dev/null
+++ b/frontend/src/components/theme-provider.tsx
@@ -0,0 +1,9 @@
+"use client"
+
+import * as React from "react"
+import { ThemeProvider as NextThemesProvider } from "next-themes"
+import { type ThemeProviderProps } from "next-themes/dist/types"
+
+export function ThemeProvider({ children, ...props }: ThemeProviderProps) {
+  return <NextThemesProvider {...props}>{children}</NextThemesProvider>
+} 
\ No newline at end of file
diff --git a/frontend/src/components/theme-toggle.tsx b/frontend/src/components/theme-toggle.tsx
new file mode 100644
index 0000000..17df44e
--- /dev/null
+++ b/frontend/src/components/theme-toggle.tsx
@@ -0,0 +1,50 @@
+"use client"
+
+import * as React from "react"
+import { Moon, Sun, Monitor } from "lucide-react"
+import { useTheme } from "next-themes"
+
+import { Button } from "@/components/ui/button"
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu"
+
+export function ThemeToggle() {
+  const { setTheme, theme } = useTheme()
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Button 
+          variant="ghost" 
+          size="icon" 
+          className="nav-button-transparent backdrop-blur-sm"
+        >
+          <Sun className="h-[1.2rem] w-[1.2rem] rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
+          <Moon className="absolute h-[1.2rem] w-[1.2rem] rotate-90 scale-0 transition-all dark:rotate-0 dark:scale-100" />
+          <span className="sr-only">Toggle theme</span>
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end" className="nav-dropdown-transparent">
+        <DropdownMenuItem onClick={() => setTheme("light")} className="flex items-center gap-2 nav-dropdown-item">
+          <Sun className="h-4 w-4" />
+          Light
+          {theme === "light" && <span className="ml-auto text-xs">✓</span>}
+        </DropdownMenuItem>
+        <DropdownMenuItem onClick={() => setTheme("dark")} className="flex items-center gap-2 nav-dropdown-item">
+          <Moon className="h-4 w-4" />
+          Dark
+          {theme === "dark" && <span className="ml-auto text-xs">✓</span>}
+        </DropdownMenuItem>
+        <DropdownMenuItem onClick={() => setTheme("system")} className="flex items-center gap-2 nav-dropdown-item">
+          <Monitor className="h-4 w-4" />
+          System
+          {theme === "system" && <span className="ml-auto text-xs">✓</span>}
+        </DropdownMenuItem>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  )
+} 
\ No newline at end of file