{# v0.62 CSS refactor: button chrome already in .dz-theme-toggle rule
   (site-sections.css). Inline ghost-button utilities removed. #}
<button class="dz-theme-toggle" id="dz-theme-toggle" aria-label="Toggle dark mode" title="Toggle dark mode">
  <svg class="dz-theme-toggle__icon dz-theme-toggle__sun" width="20" height="20" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
    <path stroke-linecap="round" stroke-linejoin="round" d="M12 3v1m0 16v1m9-9h-1M4 12H3m15.364 6.364l-.707-.707M6.343 6.343l-.707-.707m12.728 0l-.707.707M6.343 17.657l-.707.707M16 12a4 4 0 11-8 0 4 4 0 018 0z" />
  </svg>
  <svg class="dz-theme-toggle__icon dz-theme-toggle__moon" width="20" height="20" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
    <path stroke-linecap="round" stroke-linejoin="round" d="M20.354 15.354A9 9 0 018.646 3.646 9.003 9.003 0 0012 21a9.003 9.003 0 008.354-5.646z" />
  </svg>
</button>