/**
 * @file collapsible.css
 * @author Jouni Miikki
 * SPDX-License-Identifier: MIT
 * @description The collapsible: a section that opens and closes under its heading.
 *   Reads only the tokens in theme.css. The rules are theme.css's, moved unchanged and in order.
 * @usage Linked from public/spa.html right after theme.css, in the order theme.css held these rules
 *   (the shell block), and from every standalone page that links theme.css.
 * @version-history
 *   v1.0.0 — 2026-09-24 — Moved unchanged from css/theme.css (lines 1411-1459), so theme.css
 *     holds tokens only (UI consolidation, a move).
 *   v1.1.0 — 2026-09-27 — .collapsible-title gets its rule here, the header's own left alignment
 *     (which it already inherits, so nothing moves); until now the name had a rule only in the
 *     landing page's sheet, under .ld-invite and .ld-log.
 */

/* ── Collapsible (canonical) ──
   Backed by /components/Collapsible.js. A clickable header (title + a chevron
   that rotates 180° when open) with the body shown only while open. This is the
   canonical shape for the hand-rolled expand/collapse toggles scattered across
   views (.expand-btn + .pf-chevron, .scope-advanced-toggle, .pkv-entry-arrow).
   All colors are theme tokens so it flips correctly in dark mode. Callers own
   the open state (controlled component). The bespoke per-view toggles are left
   in place where their expanded markup is wired into view state; this block is
   the target for new collapsible sections. */
.collapsible {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
}
.collapsible-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  width: 100%;
  padding: 0.6rem 0.85rem;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: var(--text-note);
  font-weight: var(--weight-semibold);
  text-align: left;
  cursor: pointer;
  transition: color 0.2s;
}
.collapsible-header:hover {
  color: var(--accent);
}
/* The heading's words: aligned as the header is. */
.collapsible-title {
  text-align: left;
}
.collapsible-chevron {
  display: inline-block;
  flex-shrink: 0;
  font-size: 0.7rem;
  color: var(--text-dim);
  transition: transform 0.2s;
}
.collapsible-chevron.open {
  transform: rotate(180deg);
}
.collapsible-body {
  padding: 0 0.85rem 0.75rem;
}