<nav>
  <a class="logo" href="{{ .Site.Params.siteUrl }}">pdf<span>mux</span></a>
  <div class="nav-links">
    <a href="{{ .Site.Params.siteUrl }}" {{ if .IsHome }}class="active"{{ end }}>home</a>
    <a href="{{ .Site.BaseURL }}" {{ if not .IsPage }}class="active"{{ end }}>blog</a>
    <a href="{{ .Site.Params.github }}">github</a>
    <button class="theme-toggle" onclick="toggleTheme()" aria-label="Toggle dark mode">
      <svg class="icon-moon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"/></svg>
      <svg class="icon-sun" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg>
    </button>
  </div>
</nav>
