/*
 * Editorial — shared styles for the Blog (home.php, single.php) and the
 * Learn library (page-templates/learn-index.php, learn-article.php).
 * Page "06 Added templates" frames are not cached, so this follows the
 * established info-page system: breadcrumb → H1 at the gutter → measured
 * 569px / 16-26 prose column (see assets/css/pages.css), card grids in the
 * archive voice (see assets/css/archive.css).
 * Depends on the theme tokens (--usr-*) in style.css + pages.css frame rules.
 */

/* =========================================================================
   1. INDEX HEAD — kicker/title from pages.css; intro + count line here
   ========================================================================= */
.blog .usr-main,
.single-post .usr-main,
.usr-main--editorial { padding-top: 0; }

.usr-editorial-intro {
  max-width: 800px;
  margin: 0 0 10px;
  color: var(--usr-secondary);
  font-size: var(--usr-fs-body-l);
  line-height: var(--usr-lh-body-l);
}
.usr-editorial-intro p { margin: 0 0 10px; }
.usr-editorial-intro p:last-child { margin-bottom: 0; }

.usr-editorial-count {
  margin: 0 0 8px;
  color: var(--usr-muted);
  font-size: var(--usr-fs-small);
  line-height: var(--usr-lh-small);
}
.usr-editorial-count strong { color: var(--usr-navy); font-weight: 700; }

/* =========================================================================
   2. CARD GRID — blog index, learn index, related/library strips
   ========================================================================= */
.usr-post-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 22px 0 40px;
}
/* The theme's generic .usr-main article + article margin is for prose pages;
   cards are grid items and must share the same row baseline. */
.usr-main .usr-post-grid > article + article { margin-top: 0; }

.usr-post-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 22px 24px 20px;
  background: var(--usr-white);
  border: 1px solid rgba(19, 38, 107, 0.1);
  border-radius: 10px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.usr-post-card:hover,
.usr-post-card:focus-within {
  border-color: rgba(19, 38, 107, 0.3);
  box-shadow: 0 6px 18px rgba(19, 38, 107, 0.07);
}

.usr-post-card__meta {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px 10px;
  margin: 0 0 10px;
}
.usr-post-card__cat {
  color: var(--usr-red);
  font-size: 11.5px;
  line-height: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.usr-post-card__tag {
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--usr-tint-blue);
  color: var(--usr-navy);
  font-size: 10.5px;
  line-height: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.usr-post-card__read {
  color: var(--usr-muted);
  font-size: 12px;
  line-height: 16px;
}

.usr-post-card__title {
  margin: 0 0 8px;
  color: var(--usr-navy);
  font-size: 18px;
  line-height: 23px;
  font-weight: 600;
  letter-spacing: var(--usr-ls-heading);
  overflow-wrap: break-word;
}
.usr-post-card__title a { color: inherit; text-decoration: none; }
.usr-post-card__title a:hover,
.usr-post-card__title a:focus { color: var(--usr-link-blue); text-decoration: underline; }

.usr-post-card__excerpt {
  margin: 0 0 16px;
  color: var(--usr-secondary);
  font-size: var(--usr-fs-body);
  line-height: var(--usr-lh-body);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
}

.usr-post-card__foot {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid rgba(19, 38, 107, 0.08);
}
.usr-post-card__date {
  color: var(--usr-muted);
  font-size: 12px;
  line-height: 16px;
}
.usr-post-card__more {
  color: var(--usr-navy);
  font-size: 12.8px;
  line-height: 16px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}
.usr-post-card__more:hover,
.usr-post-card__more:focus { color: var(--usr-link-blue); text-decoration: underline; }

/* =========================================================================
   3. PAGINATION — wraps core the_posts_pagination() output
   ========================================================================= */
.usr-editorial-pagination { margin: 0 0 54px; }
.usr-editorial-pagination .nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.usr-editorial-pagination .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 13px;
  border: 1px solid rgba(19, 38, 107, 0.18);
  border-radius: var(--usr-radius-pill);
  background: var(--usr-white);
  color: var(--usr-navy);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.usr-editorial-pagination a.page-numbers:hover,
.usr-editorial-pagination a.page-numbers:focus {
  background: var(--usr-navy);
  border-color: var(--usr-navy);
  color: var(--usr-white);
}
.usr-editorial-pagination .page-numbers.current {
  background: var(--usr-navy);
  border-color: var(--usr-navy);
  color: var(--usr-white);
}
.usr-editorial-pagination .page-numbers.dots {
  border-color: transparent;
  background: transparent;
  color: var(--usr-muted);
}

/* =========================================================================
   4. ARTICLE — 569px column (byline, prose lives in .usr-prose, RUO note)
   ========================================================================= */
.usr-article {
  max-width: 569px; /* content column 569px per the policy-page system */
  margin: 4px auto 44px;
}
.usr-article .usr-prose { max-width: none; margin: 0; }

.usr-article__byline {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px 8px;
  margin: 0 0 28px;
  padding: 12px 0;
  border-top: 1px solid rgba(19, 38, 107, 0.12);
  border-bottom: 1px solid rgba(19, 38, 107, 0.12);
  color: var(--usr-muted);
  font-size: 13px;
  line-height: 20px;
}
.usr-article__byline strong { color: var(--usr-ink); font-weight: 700; }
.usr-article__byline .usr-article__cat {
  color: var(--usr-red);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.usr-article__dot { color: rgba(19, 38, 107, 0.25); }

/* Research Use Only footnote panel */
.usr-article__ruo {
  margin: 36px 0 0;
  padding: 16px 20px;
  border: 1px solid rgba(181, 23, 47, 0.25);
  border-left: 3px solid var(--usr-red);
  border-radius: 6px;
  background: var(--usr-tint-red);
}
.usr-article__ruo strong {
  display: block;
  margin: 0 0 6px;
  color: var(--usr-red);
  font-size: 11.5px;
  line-height: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.usr-article__ruo p {
  margin: 0;
  color: var(--usr-secondary);
  font-size: 13px;
  line-height: 20px;
}

/* =========================================================================
   5. RELATED / LIBRARY STRIP + closing actions
   ========================================================================= */
.usr-related {
  margin: 0 0 56px;
  padding-top: 34px;
  border-top: 1px solid rgba(19, 38, 107, 0.12);
}
.usr-related__title {
  margin: 0 0 4px;
  color: var(--usr-navy);
  font-size: var(--usr-fs-h4);
  line-height: var(--usr-lh-h4);
  font-weight: 600;
  letter-spacing: var(--usr-ls-heading);
}
.usr-related__sub {
  margin: 0;
  color: var(--usr-muted);
  font-size: var(--usr-fs-small);
  line-height: var(--usr-lh-small);
}
.usr-related .usr-post-grid { margin-bottom: 0; }
.usr-related__actions { margin-top: 26px; }

/* =========================================================================
   6. LEARN INDEX — navy cross-link panel under the grid
   ========================================================================= */
.usr-editorial-cta { max-width: 900px; margin: 4px auto 56px; }
.usr-editorial-cta .usr-panel-navy { margin: 0; }
.usr-editorial-cta .usr-panel-navy h2 {
  margin: 0 0 12px;
  color: var(--usr-white);
  font-size: var(--usr-fs-h4);
  line-height: var(--usr-lh-h4);
  font-weight: 600;
}
.usr-editorial-cta p {
  margin: 0 0 14px;
  font-size: var(--usr-fs-body);
  line-height: var(--usr-lh-body);
}
.usr-editorial-cta .usr-btn {
  background: var(--usr-red);
  border-color: var(--usr-red);
  color: var(--usr-white);
  text-decoration: none;
}
.usr-editorial-cta .usr-btn:hover,
.usr-editorial-cta .usr-btn:focus { background: #971327; border-color: #971327; color: var(--usr-white); }

/* =========================================================================
   7. BREAKPOINTS — spec: ≤1080 condense, ≤900 drop a column, ≤560 single
   ========================================================================= */
@media (max-width: 1080px) {
  .usr-post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .usr-post-grid { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .usr-related { margin-bottom: 46px; }
}
@media (max-width: 560px) {
  .usr-article { margin-bottom: 36px; }
  .usr-editorial-pagination .nav-links { gap: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  .usr-post-card,
  .usr-post-card__more,
  .usr-editorial-pagination .page-numbers { transition: none; }
}