diff --git a/src/components/Header.tsx b/src/components/Header.tsx
new file mode 100644
index 0000000..edad102
--- /dev/null
+++ b/src/components/Header.tsx
@@ -0,0 +1,51 @@
+import { useState, useEffect } from "react";
+import { Link } from "react-router-dom";
+import { Button } from "@/components/ui/button";
+import { Sheet, SheetContent, SheetTrigger } from "@/components/ui/sheet";
+import { Menu } from "lucide-react";
+import { ThemeToggle } from "@/components/ThemeToggle";
+
+export default function Header() {
+  const [open, setOpen] = useState(false);
+  const [scrolled, setScrolled] = useState(false);
+
+  useEffect(() => {
+    const fn = () => setScrolled(window.scrollY > 20);
+    window.addEventListener("scroll", fn);
+    return () => window.removeEventListener("scroll", fn);
+  }, []);
+
+  const links = [
+    { label: "Portfolio", to: "/portfolio" },
+    { label: "About", to: "/about" },
+    { label: "Services", to: "/services" },
+    { label: "Contact", to: "/contact" },
+  ];
+
+  return (
+    <header className={`fixed top-0 inset-x-0 z-50 transition-all duration-300 \${scrolled ? "bg-zinc-900/90 backdrop-blur-lg border-b border-zinc-800" : "bg-transparent"}`}>
+      <div className="mx-auto max-w-7xl flex items-center justify-between px-6 py-5">
+        <Link to="/" className="text-lg font-light tracking-[0.2em] uppercase text-white">Elena Torres</Link>
+        <nav className="hidden md:flex items-center gap-8">
+          {links.map((l) => (
+            <Link key={l.to} to={l.to} className="text-sm text-zinc-400 hover:text-white transition-colors tracking-wide">{l.label}</Link>
+          ))}
+          <ThemeToggle />
+        </nav>
+        <Sheet open={open} onOpenChange={setOpen}>
+          <SheetTrigger asChild className="md:hidden">
+            <Button variant="ghost" size="icon" className="text-white"><Menu className="h-5 w-5" /></Button>
+          </SheetTrigger>
+          <SheetContent side="right" className="w-72 bg-zinc-900 border-zinc-800">
+            <nav className="mt-8 flex flex-col gap-4">
+              {links.map((l) => (
+                <Link key={l.to} to={l.to} className="text-lg font-light text-zinc-300 hover:text-white tracking-wide" onClick={() => setOpen(false)}>{l.label}</Link>
+              ))}
+              <ThemeToggle />
+            </nav>
+          </SheetContent>
+        </Sheet>
+      </div>
+    </header>
+  );
+}
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