/* ============================================================
   ezpztrader.com — library pages (ECOSYSTEM_REDESIGN.md §8.4)
   Indicators (public + in-app ind_shell="app") and playbooks. The blog has
   its own file, pages/blog.css (BLOG.md).
     marketing/indicators*.html, _indicators_grid.html, _indicator_card.html,
     indicator*_detail.html, _indicator_detail_body.html,
     marketing/usecases.html, usecase_detail.html, _playbook_card.html
   Built on the shared components (hero, section head, card, pill, filter
   bar, empty state, pager, CTA band); this file only lays them out.
   ============================================================ */

@layer page {

/* ---------- page frame ---------- */

/* The hero already pads the top; lists sit right under it. */
.lib-section { padding-block: 0 var(--section-y); }

.lib-doc { padding-block: var(--space-12) var(--space-16); }
.lib-doc-inner { max-width: calc(960px + 2 * var(--gutter)); }
.lib-doc-inner--narrow { max-width: calc(760px + 2 * var(--gutter)); }

/* ---------- shared bits ---------- */

.lib-crumbs { margin: 0 0 var(--space-4); font-size: var(--text-sm); color: var(--ink-3); }
.lib-crumbs ol { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: 0; padding: 0; list-style: none; }
.lib-crumbs li { display: inline-flex; align-items: center; gap: var(--space-2); min-width: 0; }
.lib-crumbs li + li::before { content: "/"; color: var(--ink-faint); }
.lib-crumbs a { color: var(--ink-2); text-decoration: none; }
.lib-crumbs a:hover { color: var(--ink); text-decoration: underline; }
.lib-crumbs [aria-current] { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 40ch; }

.lib-tags { display: flex; flex-wrap: wrap; gap: var(--space-1); margin: 0; padding: 0; list-style: none; }

.lib-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2);
  margin: 0; font-family: var(--font-mono); font-size: var(--text-xs); color: var(--ink-3);
}

.lib-h2 {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xl); font-weight: var(--weight-semi);
  line-height: var(--leading-snug); letter-spacing: -0.01em; color: var(--ink);
}

/* Row link: the card's title link covers the whole card. */
.lib-card-link { color: inherit; text-decoration: none; }
.lib-card-link::after { content: ""; position: absolute; inset: 0; border-radius: inherit; }
.lib-card-link:focus-visible { outline: none; }
.lib-card-link:focus-visible::after { outline: 2px solid var(--focus); outline-offset: 2px; }
@media (hover: hover) {
  .lib-card:hover .lib-card-more,
  .lib-playbook:hover .lib-playbook-arrow { color: var(--link-hover); }
}

/* ---------- detail header (indicator, playbook) ---------- */

.lib-doc-head { margin: 0 0 var(--space-8); }
.lib-doc-head--split {
  display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between;
  gap: var(--space-4) var(--space-8);
}
.lib-doc-head-text { flex: 1 1 32rem; min-width: 0; }
.lib-doc-head--split .lib-doc-action { flex-shrink: 0; margin-top: var(--space-8); }
.lib-doc-title {
  margin: 0 0 var(--space-4);
  font-family: var(--font-display); font-size: var(--text-h1); font-weight: var(--weight-semi);
  line-height: var(--leading-tight); letter-spacing: -0.03em; color: var(--ink);
  text-wrap: balance;
}
.lib-doc-head .lib-tags { margin-bottom: var(--space-4); }
.lib-doc-head .lib-meta { margin-top: var(--space-1); }
.lib-doc-lede {
  margin: 0; max-width: 64ch;
  font-size: var(--text-lg); line-height: var(--leading-relaxed); color: var(--ink-2);
}

/* Space is reserved before the image loads (no layout shift). */
.lib-cover {
  display: flex; align-items: center; justify-content: center;
  aspect-ratio: 16 / 9; margin: 0 0 var(--space-8); overflow: hidden;
  background: var(--sunken); border: 1px solid var(--border); border-radius: var(--radius-lg);
}
.lib-cover img { display: block; width: 100%; height: 100%; object-fit: contain; }

.lib-prose { max-width: 68ch; margin-top: var(--space-8); }

/* ---------- indicator library: toolbar, grid, cards ---------- */

.lib-filters { position: sticky; top: var(--header-h); z-index: 5; padding-block: var(--space-3); background: var(--bg); border-bottom: 1px solid var(--border); }
.is-app .lib-filters { position: static; padding-block: 0; border-bottom: 0; background: transparent; }
.lib-filters .filter-search { flex: 1 1 260px; max-width: 360px; }
.lib-count {
  margin: 0 0 0 auto; align-self: center;
  font-family: var(--font-mono); font-size: var(--text-sm); font-variant-numeric: tabular-nums;
  color: var(--ink-3); white-space: nowrap;
}

.lib-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--space-4); }
.lib-grid > .empty-state { grid-column: 1 / -1; }

.lib-card { display: flex; flex-direction: column; padding: 0; overflow: hidden; }
.lib-card-media { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: var(--sunken); border-bottom: 1px solid var(--border); }
.lib-card-media img { display: block; width: 100%; height: 100%; object-fit: cover; }
.lib-card-fallback {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: var(--text-4xl); font-weight: var(--weight-semi); letter-spacing: -0.02em; color: var(--ink-3);
}
.lib-card-body { display: flex; flex: 1; flex-direction: column; gap: var(--space-3); padding: var(--space-5); }
.lib-card-title { margin: 0; font-size: var(--text-lg); font-weight: var(--weight-semi); line-height: var(--leading-snug); letter-spacing: -0.01em; color: var(--ink); }
.lib-card-text {
  margin: 0; font-size: var(--text-base); line-height: var(--leading-relaxed); color: var(--ink-2);
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.lib-card-stats { margin-top: auto; padding-top: var(--space-3); border-top: 1px solid var(--border); }
.lib-card-stat-list { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-6); margin: 0; }
.lib-card-stat-list > div { display: flex; flex-direction: column; gap: 2px; }
.lib-card-stat-list dt { font-size: var(--text-xs); color: var(--ink-3); }
.lib-card-stat-list dd { margin: 0; font-family: var(--font-mono); font-size: var(--text-base); font-weight: var(--weight-medium); font-variant-numeric: tabular-nums; color: var(--ink); }
.lib-stats-note { margin: var(--space-2) 0 0; max-width: 68ch; font-size: var(--text-xs); color: var(--ink-3); }
.lib-card-more { margin-top: auto; font-size: var(--text-sm); font-weight: var(--weight-medium); color: var(--action-ink); }
.lib-card-stats + .lib-card-more { margin-top: 0; }

.lib-sentinel { display: flex; align-items: center; justify-content: center; min-height: 2.5rem; margin-top: var(--space-4); font-size: var(--text-sm); color: var(--ink-3); }
.lib-sentinel.is-loading::before { content: "Loading more…"; }
.lib-load-error {
  margin: var(--space-4) 0 0; padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm); color: var(--ink);
  background: var(--danger-soft); border: 1px solid color-mix(in srgb, var(--danger) 40%, transparent); border-radius: var(--radius-md);
}
.lib-load-error[hidden] { display: none; }

/* ---------- indicator detail: stats, video, connect card ---------- */

.lib-stats { margin: 0 0 var(--space-8); }
.lib-stat-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1px;
  margin: 0; overflow: hidden;
  background: var(--border); border: 1px solid var(--border); border-radius: var(--radius-lg);
}
.lib-stat { display: flex; flex-direction: column; gap: var(--space-1); padding: var(--space-4) var(--space-5); background: var(--surface); }
.lib-stat dt { font-size: var(--text-xs); font-weight: var(--weight-medium); color: var(--ink-3); }
.lib-stat dd { margin: 0; font-family: var(--font-mono); font-size: var(--text-2xl); font-weight: var(--weight-medium); font-variant-numeric: tabular-nums; color: var(--ink); }

.lib-video {
  position: relative; width: 100%; aspect-ratio: 16 / 9; margin-top: var(--space-8); overflow: hidden;
  background: var(--sunken); border: 1px solid var(--border); border-radius: var(--radius-lg);
}
.lib-video iframe, .lib-video video { position: absolute; inset: 0; display: block; width: 100%; height: 100%; border: 0; }
.lib-video-error {
  margin: var(--space-2) 0 0; padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm); color: var(--ink-2);
  background: var(--danger-soft); border: 1px solid color-mix(in srgb, var(--danger) 40%, transparent); border-radius: var(--radius-md);
}
.lib-video-error[hidden] { display: none; }

.lib-connect {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: var(--space-4) var(--space-6); margin-top: var(--space-10); padding: var(--space-6);
}
.lib-connect-text { flex: 1 1 28rem; min-width: 0; }
.lib-connect-text .lib-h2 { margin-bottom: var(--space-2); }
.lib-connect-text p { margin: 0; max-width: 60ch; color: var(--ink-2); }

/* ---------- playbooks ---------- */

.lib-playbook-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: var(--space-4); }
.lib-playbook { display: flex; flex-direction: column; gap: var(--space-2); }
.lib-playbook-title { margin: 0; font-size: var(--text-lg); font-weight: var(--weight-semi); line-height: var(--leading-snug); color: var(--ink); }
.lib-playbook-text { margin: 0; color: var(--ink-2); line-height: var(--leading-relaxed); }
.lib-playbook-arrow { margin-top: auto; padding-top: var(--space-2); color: var(--action-ink); }

.lib-feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: var(--space-4); }
.lib-feature-title { margin: 0 0 var(--space-2); font-size: var(--text-lg); font-weight: var(--weight-semi); line-height: var(--leading-snug); color: var(--ink); }
.lib-feature p { margin: 0; color: var(--ink-2); line-height: var(--leading-relaxed); }

/* ---------- small screens ---------- */

@media (max-width: 640px) {
  .lib-doc { padding-block: var(--space-8) var(--space-12); }
  .lib-filters { position: static; }
  .lib-filters .filter-search { flex-basis: 100%; max-width: none; }
  .lib-filters .filter-pills { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 2px; scrollbar-width: none; }
  .lib-filters .filter-pills::-webkit-scrollbar { display: none; }
  .lib-count { margin-left: 0; }
  .lib-doc-head--split .lib-doc-action { margin-top: 0; }

  /* Indicator cards become list rows: thumb on the left, same elements. */
  .lib-grid { grid-template-columns: 1fr; gap: var(--space-2); }
  .lib-card { display: grid; grid-template-columns: 104px minmax(0, 1fr); }
  .lib-card-media { aspect-ratio: auto; min-height: 104px; height: 100%; border-bottom: 0; border-right: 1px solid var(--border); }
  .lib-card-fallback { font-size: var(--text-xl); }
  .lib-card-body { gap: var(--space-2); padding: var(--space-3); }
  .lib-card-title { font-size: var(--text-md); }
  .lib-card-text { font-size: var(--text-sm); -webkit-line-clamp: 2; }
  .lib-card-stats { padding-top: var(--space-2); }
  .lib-card-stat-list { gap: var(--space-4); }
  .lib-card-stat-list dd { font-size: var(--text-sm); }

  .lib-connect { padding: var(--space-5); }
}
@media (pointer: coarse) {
  .lib-filters .filter-pill { min-height: var(--control-lg); }
  .lib-filters .filter-search-input { height: var(--control-lg); }
}

} /* @layer page */