hugo-paper/layouts/partials/header.html

<header class="mx-auto flex h-[5rem] max-w-3xl px-8 lg:justify-center">
  <div class="relative z-50 mr-auto flex items-center">
    <a
      class="-translate-x-[1px] -translate-y-0.5 text-3xl font-bold"
      href="{{ `/` | absURL }}"
      >{{ site.Title }}</a
    >
    <div
      class="btn-dark text-[0] ml-6 h-6 w-6 shrink-0 cursor-pointer {{ if site.Params.monoDarkIcon }}[background:url(./theme.svg)_left_center/cover_no-repeat] dark:invert{{ else }}[background:url(./theme.png)_left_center/_auto_theme('spacing.6')_no-repeat] [transition:_background-position_0.4s_steps(5)]{{ end }} dark:[background-position:right]"
    ></div>
  </div>

  <div
    class="btn-menu relative z-50 -mr-8 flex h-[5rem] w-[5rem] shrink-0 cursor-pointer flex-col items-center justify-center gap-2.5 lg:hidden"
  ></div>

  {{ $bg_color := $.Scratch.Get "bg_color" }}
  <script>
    // base
    const htmlClass = document.documentElement.classList;
    setTimeout(() => {
      htmlClass.remove('not-ready');
    }, 10);

    // mobile menu
    const btnMenu = document.querySelector('.btn-menu');
    btnMenu.addEventListener('click', () => {
      htmlClass.toggle('open');
    });

    // dark theme
    const metaTheme = document.querySelector('meta[name="theme-color"]');
    const lightBg = `{{ $.Scratch.Get "bg_color" }}`.replace(/"/g, '');
    const setDark = (isDark) => {
      metaTheme.setAttribute('content', isDark ? '#000' : lightBg);
      htmlClass[isDark ? 'add' : 'remove']('dark');
      localStorage.setItem('dark', isDark);
    };

    // init
    const darkScheme = window.matchMedia('(prefers-color-scheme: dark)');
    if (htmlClass.contains('dark')) {
      setDark(true);
    } else {
      const darkVal = localStorage.getItem('dark');
      setDark(darkVal ? darkVal === 'true' : darkScheme.matches);
    }

    // listen system
    darkScheme.addEventListener('change', (event) => {
      setDark(event.matches);
    });

    // manual switch
    const btnDark = document.querySelector('.btn-dark');
    btnDark.addEventListener('click', () => {
      setDark(localStorage.getItem('dark') !== 'true');
    });
  </script>

  <div
    class="nav-wrapper fixed inset-x-0 top-full z-40 flex h-full select-none flex-col justify-center pb-16 duration-200 dark:bg-black lg:static lg:h-auto lg:flex-row lg:!bg-transparent lg:pb-0 lg:transition-none"
  >
    {{ $url := .RelPermalink }}<!---->
    {{ with site.Menus.main }}
    <nav class="lg:ml-12 lg:flex lg:flex-row lg:items-center lg:space-x-6">
      {{ range . }}
      <a
        class="block text-center text-2xl leading-[5rem] lg:text-base lg:font-normal"
        href="{{ .URL }}"
        >{{ .Name }}</a
      >
      {{ end }}
    </nav>
    {{ end }}<!---->

    {{ with $.Scratch.Get "social_list" }}
    <nav
      class="mt-12 flex justify-center space-x-10 dark:invert lg:mt-0 lg:ml-12 lg:items-center lg:space-x-6"
    >
      {{ range . }}<!---->
      <a
        class="h-8 w-8 text-[0] [background:var(--url)_center_center/cover_no-repeat] lg:h-6 lg:w-6"
        style="--url: url(./{{ . }}.svg)"
        href="{{ if eq . `rss` }}{{ `index.xml` | absURL }}{{ else if eq . `mastodon` }}{{ site.Params.Get . }}{{ else }}https://{{ . }}.com/{{ site.Params.Get . }}{{ end }}"
        target="_blank"
        rel="{{ if eq . `rss` }}alternate{{ else }}me{{ end }}"
      >
        {{ . }}
      </a>
      {{ end }}<!---->
    </nav>
    {{ end }}<!---->
  </div>
</header>