<!-- Theme toggle: cycles light → dark → auto -->
<button id="themis-theme-toggle" class="btn btn-ghost btn-sm btn-circle"
        title="Toggle theme" aria-label="Toggle theme">
    <!-- Sun icon (shown in dark mode) -->
    <svg id="themis-icon-sun" xmlns="http://www.w3.org/2000/svg" class="h-5 w-5 hidden"
         fill="none" viewBox="0 0 24 24" stroke="currentColor">
        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
              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>
    <!-- Moon icon (shown in light mode) -->
    <svg id="themis-icon-moon" xmlns="http://www.w3.org/2000/svg" class="h-5 w-5 hidden"
         fill="none" viewBox="0 0 24 24" stroke="currentColor">
        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
              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>
    <!-- Auto icon (shown in auto mode) -->
    <svg id="themis-icon-auto" xmlns="http://www.w3.org/2000/svg" class="h-5 w-5 hidden"
         fill="none" viewBox="0 0 24 24" stroke="currentColor">
        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
              d="M9.75 17L9 20l-1 1h8l-1-1-.75-3M3 13h18M5 17h14a2 2 0 002-2V5a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z" />
    </svg>
</button>
