Split Actions Navbar

<!--
  A split action cluster on the right: a ghost "Sign in" text link, a divider,
  then a filled "Sign up" button - the two-tier auth pattern. Both actions plus
  the links fold into the hamburger panel below md, so the phone layout keeps
  the same hierarchy: links, then sign in, then the primary button.
-->
<header class="border-b border-gray-200 bg-white dark:border-gray-800 dark:bg-gray-900">
  <nav class="mx-auto flex h-14 max-w-6xl items-center gap-4 px-4" aria-label="Main">
    <a href="/" class="font-bold text-gray-900 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-blue-600 dark:text-gray-50 dark:focus-visible:ring-blue-400">Adysre</a>

    <ul class="mr-auto hidden items-center gap-1 md:flex">
      <li><a href="/product" class="rounded-md px-3 py-1.5 text-sm font-medium text-gray-700 hover:bg-gray-100 hover:text-gray-900 dark:text-gray-300 dark:hover:bg-gray-800 dark:hover:text-gray-50">Product</a></li>
      <li><a href="/pricing" class="rounded-md px-3 py-1.5 text-sm font-medium text-gray-700 hover:bg-gray-100 hover:text-gray-900 dark:text-gray-300 dark:hover:bg-gray-800 dark:hover:text-gray-50">Pricing</a></li>
      <li><a href="/docs" class="rounded-md px-3 py-1.5 text-sm font-medium text-gray-700 hover:bg-gray-100 hover:text-gray-900 dark:text-gray-300 dark:hover:bg-gray-800 dark:hover:text-gray-50">Docs</a></li>
    </ul>

    <div class="hidden items-center gap-3 md:flex">
      <a href="/login" class="text-sm font-medium text-gray-700 hover:text-gray-900 dark:text-gray-300 dark:hover:text-gray-50">Sign in</a>
      <span class="h-5 w-px bg-gray-200 dark:bg-gray-700" aria-hidden="true"></span>
      <a href="/signup" class="rounded-lg bg-blue-600 px-3.5 py-1.5 text-sm font-semibold text-white hover:bg-blue-700">Sign up</a>
    </div>

    <button
      type="button"
      aria-expanded="false"
      aria-controls="nav-split-menu"
      aria-label="Open main menu"
      class="ml-auto inline-flex h-9 w-9 items-center justify-center rounded-md text-gray-700 hover:bg-gray-100 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-blue-600 md:hidden dark:text-gray-300 dark:hover:bg-gray-800 dark:focus-visible:ring-blue-400"
    >
      <svg class="h-5 w-5" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" aria-hidden="true" focusable="false"><path d="M4 6h16M4 12h16M4 18h16" /></svg>
    </button>
  </nav>

  <div id="nav-split-menu" hidden class="border-t border-gray-200 px-4 pb-4 pt-2 md:hidden dark:border-gray-800">
    <ul class="flex flex-col gap-1">
      <li><a href="/product" class="block rounded-md px-3 py-2 text-sm font-medium text-gray-700 hover:bg-gray-100 dark:text-gray-300 dark:hover:bg-gray-800">Product</a></li>
      <li><a href="/pricing" class="block rounded-md px-3 py-2 text-sm font-medium text-gray-700 hover:bg-gray-100 dark:text-gray-300 dark:hover:bg-gray-800">Pricing</a></li>
      <li><a href="/docs" class="block rounded-md px-3 py-2 text-sm font-medium text-gray-700 hover:bg-gray-100 dark:text-gray-300 dark:hover:bg-gray-800">Docs</a></li>
    </ul>
    <div class="mt-2 flex flex-col gap-2 border-t border-gray-200 pt-3 dark:border-gray-800">
      <a href="/login" class="rounded-lg border border-gray-300 px-3 py-2 text-center text-sm font-semibold text-gray-900 hover:bg-gray-100 dark:border-gray-700 dark:text-gray-50 dark:hover:bg-gray-800">Sign in</a>
      <a href="/signup" class="rounded-lg bg-blue-600 px-3 py-2 text-center text-sm font-semibold text-white hover:bg-blue-700">Sign up</a>
    </div>
  </div>
</header>