/* ──────────────────────────────────────────────────────────────────────────
   FAQ page.

   Replaces the three-question accordion that used to sit at the bottom of the
   home page, where it existed for the crawler and was read by nobody. Given a
   page of its own it can be the thing a confused person actually lands on, so
   it is built for reading: one column, generous measure, a sticky category rail
   on the left at desktop width, and a filter that narrows as you type.

   The accordion is <details>/<summary>. Native disclosure gets keyboard
   handling, the aria-expanded contract and the find-in-page behaviour for free,
   and it still works with the filter script disabled -- which matters for a
   help page more than anywhere else on the site.
   ────────────────────────────────────────────────────────────────────────── */

.faq-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px 96px;
}

/* ── Hero ──────────────────────────────────────────────────────────────── */

.faq-hero {
  padding: 56px 0 32px;
  position: relative;
}

.faq-hero-kicker {
  display: block;
  margin-bottom: 14px;
}

.faq-hero h1 {
  margin: 0 0 14px;
  max-width: 18ch;
}

.faq-hero-sub {
  margin: 0;
  max-width: 56ch;
  color: var(--md-on-surface-variant);
}

/* The search field. A form so Enter does nothing surprising; the script owns
   the filtering and preventDefault keeps the page from reloading. */
.faq-search {
  margin-top: 28px;
  max-width: 520px;
  position: relative;
  display: flex;
  align-items: center;
}

.faq-search .material-symbols-outlined {
  position: absolute;
  left: 18px;
  font-size: 20px;
  color: var(--md-on-surface-variant);
  pointer-events: none;
}

.faq-search input {
  width: 100%;
  padding: 15px 46px 15px 50px;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-full);
  background: var(--md-surface-container-low);
  color: var(--md-on-surface);
  font-family: inherit;
  font-size: 0.9375rem;
  transition: border-color var(--md-motion-effects),
              background var(--md-motion-effects);
}

.faq-search input:focus {
  outline: none;
  border-color: var(--md-primary);
  background: var(--md-surface);
}

.faq-search input::placeholder { color: var(--md-on-surface-variant); }

.faq-search-clear {
  position: absolute;
  right: 8px;
  display: none;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: var(--md-shape-full);
  background: transparent;
  color: var(--md-on-surface-variant);
  cursor: pointer;
}

.faq-search-clear .material-symbols-outlined {
  position: static;
  font-size: 18px;
}

.faq-search.is-filled .faq-search-clear { display: grid; }

/* ── Body: rail + sections ─────────────────────────────────────────────── */

.faq-body {
  display: grid;
  grid-template-columns: 224px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
  padding-top: 8px;
}

.faq-rail {
  position: sticky;
  top: 88px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.faq-rail-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  border-radius: var(--md-shape-full);
  color: var(--md-on-surface-variant);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  transition: background var(--md-motion-effects),
              color var(--md-motion-effects);
}

.faq-rail-link .material-symbols-outlined { font-size: 20px; }

.faq-rail-link:hover { background: var(--md-surface-container); }

.faq-rail-link.is-current {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}

.faq-section { scroll-margin-top: 88px; }

.faq-section + .faq-section { margin-top: 52px; }

.faq-section-head { margin-bottom: 18px; }

.faq-section-head h2 { margin: 0 0 4px; }

.faq-section-head p {
  margin: 0;
  color: var(--md-on-surface-variant);
  font-size: 0.875rem;
}

/* ── The accordion ─────────────────────────────────────────────────────────
   Items share one hairline stack rather than each being a card: a list of
   twenty cards reads as twenty things to do, a list of twenty rules reads as
   one thing to skim. ── */

.faq-list {
  border-top: 1px solid var(--md-outline-variant);
}

.faq-item {
  border-bottom: 1px solid var(--md-outline-variant);
}

.faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 19px 4px;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--md-on-surface);
  transition: color var(--md-motion-effects);
}

.faq-item > summary::-webkit-details-marker { display: none; }

.faq-item > summary:hover { color: var(--md-primary); }

.faq-item[open] > summary { color: var(--md-primary); }

.faq-item-q { flex: 1; }

/* The marker is a plus that becomes a minus. Rotating one bar is cheaper than
   swapping a glyph and it animates, which is the point. */
.faq-item-marker {
  flex: none;
  position: relative;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  color: var(--md-on-surface-variant);
}

.faq-item-marker::before,
.faq-item-marker::after {
  content: '';
  position: absolute;
  left: 3px;
  top: 9px;
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--md-motion-spatial-fast);
}

.faq-item-marker::after { transform: rotate(90deg); }

.faq-item[open] .faq-item-marker { color: var(--md-primary); }

.faq-item[open] .faq-item-marker::after { transform: rotate(0deg); }

/* <details> cannot transition its own height, so the answer animates itself on
   open. Opacity and a short lift, no height, which means no layout thrash. */
.faq-answer {
  padding: 0 40px 22px 4px;
  color: var(--md-on-surface-variant);
  font-size: 0.9375rem;
  line-height: 1.7;
  animation: faq-reveal var(--md-motion-spatial-fast) both;
}

.faq-answer a {
  color: var(--md-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

@keyframes faq-reveal {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}

/* ── Filter states ─────────────────────────────────────────────────────── */

.faq-item[hidden],
.faq-section[hidden] { display: none; }

.faq-empty {
  display: none;
  padding: 56px 8px;
  text-align: center;
  color: var(--md-on-surface-variant);
}

.faq-empty .material-symbols-outlined {
  font-size: 40px;
  opacity: 0.5;
}

.faq-empty p { margin: 12px 0 0; }

.faq-body.is-filtering .faq-rail { visibility: hidden; }

.faq-body.is-empty .faq-empty { display: block; }

/* ── Closing CTA ───────────────────────────────────────────────────────── */

.faq-cta {
  margin-top: 64px;
  padding: 36px 32px;
  border-radius: var(--md-shape-xl);
  background: var(--md-surface-container-low);
  border: 1px solid var(--md-outline-variant);
  text-align: center;
}

.faq-cta h2 { margin: 0 0 8px; }

.faq-cta p {
  margin: 0 auto 22px;
  max-width: 46ch;
  color: var(--md-on-surface-variant);
  font-size: 0.9375rem;
}

.faq-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

/* ── Narrow ────────────────────────────────────────────────────────────────
   The rail becomes a horizontal scroller above the content. Same links, same
   anchors -- it just stops being a column. ── */
@media (max-width: 900px) {
  .faq-body {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .faq-rail {
    position: static;
    flex-direction: row;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .faq-rail::-webkit-scrollbar { display: none; }

  .faq-rail-link {
    flex: none;
    border: 1px solid var(--md-outline-variant);
    padding: 9px 16px;
  }

  .faq-rail-link .material-symbols-outlined { display: none; }

  .faq-body.is-filtering .faq-rail { display: none; }
}

@media (max-width: 600px) {
  .faq-hero { padding: 36px 0 24px; }
  .faq-hero h1 { max-width: none; }
  .faq-answer { padding-right: 8px; }
  .faq-cta { padding: 28px 20px; }
}