feat: sticky Header with persistent contact CTA

components/layout/Header.tsx

@@ -0,0 +1,19 @@
+import { Wordmark } from '@/components/primitives/Wordmark';
+import { CTA } from '@/components/primitives/CTA';
+import { Container } from '@/components/primitives/Container';
+import { header } from '@/lib/content';
+
+export function Header() {
+  return (
+    <header className="sticky top-0 z-50 border-b border-ink/10 bg-base/80 backdrop-blur">
+      <Container className="flex items-center justify-between py-3">
+        <a href="#top" aria-label="creeer — inicio">
+          <Wordmark size="md" />
+        </a>
+        <nav aria-label="Principal">
+          <CTA href="#contacto" label={header.cta} variant="light" />
+        </nav>
+      </Container>
+    </header>
+  );
+}