partition-jlg-theme/resources/views/sections/header.blade.php

<header class="text-4xl py-8 shadow-lg fixed top-0 h-1/12 w-full bg-slate-900 flex flex-row justify-center items-center z-10">
  <a class="brand" href="{{ home_url('/') }}">
    {!! $siteName !!}
  </a>

  @if (has_nav_menu('primary_navigation'))
    <nav class="nav-primary" aria-label="{{ wp_get_nav_menu_name('primary_navigation') }}">
      {!! wp_nav_menu(['theme_location' => 'primary_navigation', 'menu_class' => 'nav', 'echo' => false]) !!}
    </nav>
  @endif
</header>