Add responsive navbar with hamburger menu for mobile and tablet devices

src/app/components/TopNavBar.tsx

@@ -1,4 +1,5 @@
 "use client";
+import { useState } from "react";
 import { usePathname } from "next/navigation";
 import Link from "next/link";
 import Image from "next/image";
@@ -8,17 +9,24 @@ import { cx } from "lib/cx";
 export const TopNavBar = () => {
   const pathName = usePathname();
   const isHomePage = pathName === "/";
+  const [isMenuOpen, setIsMenuOpen] = useState(false);
+
+  const navItems = [
+    ["/resume-builder", "Builder"],
+    ["/resume-parser", "Parser"],
+  ];
 
   return (
     <header
       aria-label="Site Header"
       className={cx(
-        "flex h-[var(--top-nav-bar-height)] items-center border-b-2 border-gray-100 px-3 lg:px-12",
+        "relative border-b-2 border-gray-100 px-3 lg:px-12",
         isHomePage && "bg-dot"
       )}
     >
-      <div className="flex h-10 w-full items-center justify-between">
-        <Link href="/">
+      <div className="flex h-[var(--top-nav-bar-height)] items-center justify-between">
+        {/* Logo */}
+        <Link href="/" onClick={() => setIsMenuOpen(false)}>
           <span className="sr-only">OpenResume</span>
           <Image
             src={logoSrc}
@@ -27,14 +35,13 @@ export const TopNavBar = () => {
             priority
           />
         </Link>
+
+        {/* Desktop Navigation */}
         <nav
           aria-label="Site Nav Bar"
-          className="flex items-center gap-2 text-sm font-medium"
+          className="hidden items-center gap-2 text-sm font-medium md:flex"
         >
-          {[
-            ["/resume-builder", "Builder"],
-            ["/resume-parser", "Parser"],
-          ].map(([href, text]) => (
+          {navItems.map(([href, text]) => (
             <Link
               key={text}
               className="rounded-md px-1.5 py-2 text-gray-500 hover:bg-gray-100 focus-visible:bg-gray-100 lg:px-4"
@@ -53,7 +60,51 @@ export const TopNavBar = () => {
             />
           </div>
         </nav>
+
+        {/* Hamburger Button (Mobile/Tablet) */}
+        <button
+          type="button"
+          className="flex flex-col gap-1 p-2 md:hidden"
+          aria-label="Toggle navigation menu"
+          aria-expanded={isMenuOpen}
+          onClick={() => setIsMenuOpen(!isMenuOpen)}
+        >
+          <span className="block h-0.5 w-6 bg-gray-700"></span>
+          <span className="block h-0.5 w-6 bg-gray-700"></span>
+          <span className="block h-0.5 w-6 bg-gray-700"></span>
+        </button>
       </div>
+
+      {/* Mobile Navigation Menu */}
+      {isMenuOpen && (
+        <nav
+          aria-label="Mobile Site Navigation"
+          className="absolute left-0 top-full z-50 w-full border-b-2 border-gray-100 bg-white shadow-md md:hidden"
+        >
+          <div className="flex flex-col px-3 py-2">
+            {navItems.map(([href, text]) => (
+              <Link
+                key={text}
+                href={href}
+                onClick={() => setIsMenuOpen(false)}
+                className="rounded-md px-3 py-3 text-gray-500 hover:bg-gray-100"
+              >
+                {text}
+              </Link>
+            ))}
+
+            <div className="px-3 py-2">
+              <iframe
+                src="https://ghbtns.com/github-btn.html?user=xitanggg&repo=open-resume&type=star&count=true"
+                width="100"
+                height="20"
+                className="overflow-hidden border-none"
+                title="GitHub"
+              />
+            </div>
+          </div>
+        </nav>
+      )}
     </header>
   );
-};
+};