{#- Opens the secondary sidebar drawer on narrow screens; pydata only renders its own in the (empty) navbar.

    Unconditional: pydata decides whether a page has a secondary sidebar only after it has dropped
    the header templates that render empty. scverse.css hides the button on pages without one.
-#}
<button
  type="button"
  class="pst-navbar-icon sidebar-toggle secondary-toggle"
  aria-label="{{ _("On this page") }}"
>
  <span class="fa-solid fa-outdent"></span>
</button>