/* ==========================================================================
   Collapsible content sections

   Companion to collapsible-sections.js; both are only linked into the page when
   the theme's `collapsible_sections` option is on. Tokens (--primary,
   --text-muted, --radius-sm) come from geoscape.css, so light/dark switching is
   automatic.

   collapsible-sections.js wraps each h2's text in a <button.gs-section-toggle>
   (leaving the ¶ permalink outside it) and adds .gs-collapsible-section to the
   <section>, toggling .gs-collapsed on click.
   ========================================================================== */

/* The toggle sits inside the <h2>, so strip all button chrome and inherit the
   heading's own type — it should read as the heading, just clickable. */
.gs-section-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.gs-section-toggle:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Chevron affordance, drawn from the current text colour so it tracks the
   heading in both themes. Points down when expanded; rotates to point right
   when the section is collapsed. */
.gs-section-toggle::before {
  content: "";
  flex: none;
  width: 0.6em;
  height: 0.6em;
  background-color: currentColor;
  /* lucide: chevron-down */
  -webkit-mask: no-repeat center / contain
    url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="m6 9 6 6 6-6"/></svg>');
  mask: no-repeat center / contain
    url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="m6 9 6 6 6-6"/></svg>');
  color: var(--text-muted);
  transition: transform 0.15s ease;
}

.gs-collapsible-section.gs-collapsed > h2 .gs-section-toggle::before {
  transform: rotate(-90deg);
}

/* Collapsed: hide everything in the section except its heading (the first
   child). Nested h3+ content collapses along with it. */
.gs-collapsible-section.gs-collapsed > :not(:first-child) {
  display: none;
}

/* Never lose content in a print/PDF export: expand every section and drop the
   chevron. */
@media print {
  .gs-collapsible-section.gs-collapsed > * {
    display: revert;
  }
  .gs-section-toggle::before {
    display: none;
  }
}