NavSticky Navigation

---
/**
 * NavSticky
 * Start transparant, wordt wit/solid na scrollen.
 * Identieke props als NavSimple.
 */
interface Props {
  logo: string;
  logoHref?: string;
  links: { label: string; href: string }[];
  cta?: { label: string; href: string };
}

const { logo, logoHref = '/', links, cta } = Astro.props;
---

<header class="nav-sticky" data-sticky>
  <div class="nav-sticky__inner">
    <a href={logoHref} class="nav-sticky__logo">{logo}</a>
    <nav class="nav-sticky__links">
      {links.map(l => <a href={l.href} class="nav-sticky__link">{l.label}</a>)}
    </nav>
    {cta && <a href={cta.href} class="nav-sticky__cta">{cta.label}</a>}
    <button class="nav-sticky__hamburger" aria-label="Menu" aria-expanded="false">
      <span></span><span></span><span></span>
    </button>
  </div>
  <div class="nav-sticky__mobile">
    {links.map(l => <a href={l.href} class="nav-sticky__mobile-link">{l.label}</a>)}
    {cta && <a href={cta.href} class="nav-sticky__cta nav-sticky__cta--mobile">{cta.label}</a>}
  </div>
</header>

<style>
  .nav-sticky {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 200;
    background: transparent;
    transition: background 0.3s, box-shadow 0.3s;
  }
  .nav-sticky.is-scrolled {
    background: var(--color-bg);
    box-shadow: 0 1px 0 color-mix(in srgb, var(--color-text) 10%, transparent);
  }
  .nav-sticky__inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 4rem;
    display: flex;
    align-items: center;
    gap: 2rem;
  }
  .nav-sticky__logo {
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--color-text);
    text-decoration: none;
    margin-right: auto;
  }
  .nav-sticky__links {
    display: none;
    gap: 1.75rem;
  }
  @media (min-width: 768px) { .nav-sticky__links { display: flex; } }
  .nav-sticky__link {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.9375rem;
    opacity: 0.75;
    transition: opacity 0.2s;
  }
  .nav-sticky__link:hover { opacity: 1; }
  .nav-sticky__cta {
    display: none;
    padding: 0.5rem 1.25rem;
    background: var(--color-accent);
    color: #fff;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9375rem;
  }
  @media (min-width: 768px) { .nav-sticky__cta { display: inline-block; } }
  .nav-sticky__hamburger {
    display: flex; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 0.25rem;
    margin-left: auto;
  }
  .nav-sticky__hamburger span { display: block; width: 22px; height: 2px; background: var(--color-text); }
  @media (min-width: 768px) { .nav-sticky__hamburger { display: none; } }
  .nav-sticky__mobile {
    display: flex; flex-direction: column;
    max-height: 0; overflow: hidden;
    transition: max-height 0.35s ease;
    background: var(--color-bg);
  }
  .nav-sticky__mobile.is-open { max-height: 400px; }
  .nav-sticky__mobile-link {
    padding: 0.875rem 1.5rem;
    color: var(--color-text);
    text-decoration: none;
    border-top: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent);
  }
  .nav-sticky__cta--mobile { display: block; margin: 1rem 1.5rem 1.5rem; text-align: center; }
  @media (min-width: 768px) { .nav-sticky__mobile { display: none; } }
</style>

<script>
  const nav = document.querySelector('[data-sticky]');
  window.addEventListener('scroll', () => {
    nav?.classList.toggle('is-scrolled', window.scrollY > 40);
  }, { passive: true });
  const btn = document.querySelector('.nav-sticky__hamburger') as HTMLButtonElement;
  const menu = document.querySelector('.nav-sticky__mobile');
  btn?.addEventListener('click', () => {
    const open = menu?.classList.toggle('is-open');
    btn.setAttribute('aria-expanded', String(open));
  });
</script>