portifolio-evandrodevbr/app/components/Header.tsx

"use client";

import { type KeyboardEvent, useEffect, useRef, useState } from "react";
import { NAVIGATION_ITEMS } from "@/lib/site-navigation";
import MagneticButton from "./cinematic/MagneticButton";
import { Logo } from "./Logo";

const MENU_ID = "site-navigation-menu";

export function Header() {
  const [mobileMenuOpen, setMobileMenuOpen] = useState(false);
  const [scrolled, setScrolled] = useState(false);
  const menuButtonRef = useRef<HTMLButtonElement>(null);

  useEffect(() => {
    let wasScrolled = false;
    const updateScrolled = () => {
      const nextScrolled = window.scrollY > 0;
      if (nextScrolled === wasScrolled) return;
      wasScrolled = nextScrolled;
      setScrolled(nextScrolled);
    };

    updateScrolled();
    window.addEventListener("scroll", updateScrolled, { passive: true });
    return () => window.removeEventListener("scroll", updateScrolled);
  }, []);

  const closeMobileMenu = () => setMobileMenuOpen(false);

  const handleMenuKeyDown = (event: KeyboardEvent<HTMLElement>) => {
    if (event.key !== "Escape") return;

    event.preventDefault();
    closeMobileMenu();
    menuButtonRef.current?.focus();
  };

  return (
    <header
      className={`fixed inset-x-0 top-0 z-[9000] h-[var(--site-header-height)] w-full border-b px-sp-6 text-[var(--white)] transition-colors duration-200 lg:px-sp-8 xl:px-sp-12 ${
        scrolled
          ? "border-white/12 bg-[var(--ink)]/95 backdrop-blur-md"
          : "border-transparent bg-[var(--ink)]"
      }`}
    >
      <div className="ds-section-shell flex h-full items-center justify-between gap-sp-6">
        <a
          href="/#home"
          aria-label="Evandro.dev.br — início"
          className="flex min-h-11 shrink-0 items-center no-underline"
        >
          <Logo theme="dark" loading="eager" className="w-40 sm:w-44" />
        </a>

        <nav
          aria-label="Navegação principal"
          className="hidden items-center xl:flex"
        >
          <ul className="flex list-none items-center gap-sp-4">
            {NAVIGATION_ITEMS.map((item) => (
              <li key={item.href}>
                <a
                  href={item.href}
                  className="inline-flex min-h-11 items-center whitespace-nowrap rounded-sm px-sp-3 font-display text-sm font-medium normal-case tracking-normal text-white/80 no-underline transition-colors hover:bg-white/5 hover:text-white"
                >
                  {item.label}
                </a>
              </li>
            ))}
          </ul>
        </nav>

        <div className="flex shrink-0 items-center">
          <div className="hidden xl:block">
            <a
              href="/#contact"
              className="inline-flex min-h-11 items-center whitespace-nowrap rounded-sm bg-[var(--slash)] px-sp-4 font-display text-sm font-semibold normal-case tracking-normal text-[var(--ink)] no-underline transition-colors hover:bg-[var(--white)]"
            >
              Falar sobre meu projeto
            </a>
          </div>
          <button
            ref={menuButtonRef}
            type="button"
            className="flex h-11 w-11 flex-col items-center justify-center gap-sp-2 border-none bg-transparent focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[var(--slash)] focus-visible:ring-offset-2 focus-visible:ring-offset-[var(--ink)] xl:hidden"
            onClick={() => setMobileMenuOpen(!mobileMenuOpen)}
            aria-controls={mobileMenuOpen ? MENU_ID : undefined}
            aria-label={mobileMenuOpen ? "Fechar menu" : "Abrir menu"}
            aria-expanded={mobileMenuOpen}
            onKeyDown={handleMenuKeyDown}
          >
            <span
              className={`h-0.5 w-5 bg-white transition-transform duration-300 ${mobileMenuOpen ? "translate-y-[6px] rotate-45" : ""}`}
            />
            <span
              className={`h-0.5 w-5 bg-white transition-opacity duration-300 ${mobileMenuOpen ? "opacity-0" : ""}`}
            />
            <span
              className={`h-0.5 w-5 bg-white transition-transform duration-300 ${mobileMenuOpen ? "-translate-y-[6px] -rotate-45" : ""}`}
            />
          </button>
        </div>
      </div>

      {mobileMenuOpen ? (
        <div className="absolute inset-x-0 top-[var(--site-header-height)] max-h-[calc(100dvh-var(--site-header-height))] overflow-y-auto border-b border-white/12 bg-[var(--ink)] px-sp-6 lg:px-sp-8 xl:hidden">
          <div className="ds-section-shell flex flex-col py-sp-6">
            <nav
              id={MENU_ID}
              aria-hidden={!mobileMenuOpen}
              aria-label="Navegação mobile"
              onKeyDown={handleMenuKeyDown}
            >
              <ul className="flex list-none flex-col gap-sp-2">
                {NAVIGATION_ITEMS.map((item) => (
                  <li key={item.href}>
                    <MagneticButton
                      as="a"
                      strength={0}
                      wrapperClassName="w-full"
                      href={item.href}
                      className="flex min-h-11 items-center rounded-sm px-sp-3 py-sp-3 font-display text-sm font-medium normal-case tracking-normal text-white/80 no-underline transition-colors hover:bg-white/5 hover:text-white"
                      onClick={closeMobileMenu}
                    >
                      {item.label}
                    </MagneticButton>
                  </li>
                ))}
                <li>
                  <MagneticButton
                    as="a"
                    strength={0}
                    href="/#contact"
                    className="mt-sp-4 inline-flex min-h-11 items-center rounded-sm bg-[var(--slash)] px-sp-4 font-display text-sm font-semibold normal-case tracking-normal text-[var(--ink)] no-underline transition-colors hover:bg-[var(--white)]"
                    onClick={closeMobileMenu}
                  >
                    Falar sobre meu projeto
                  </MagneticButton>
                </li>
              </ul>
            </nav>
          </div>
        </div>
      ) : null}
    </header>
  );
}