/* Blogs section: /blog index (hero, search, filters, featured post, card grid,
   CTA) and the shared article features (cover, TOC, share, author card,
   related articles). Tokens only. Markup: scripts/site/blog-ui.mjs. */

/* ---------- Hero + search ---------- */
.blog-hero { padding-block: var(--space-6) var(--space-5); background: linear-gradient(180deg, var(--ts-sky-50) 0%, var(--ts-white) 100%); text-align: center; }
.blog-hero .badge { justify-content: center; }
.blog-hero h1 { margin: var(--space-3) auto var(--space-3); max-width: 22ch; font-size: clamp(1.875rem, 1.3rem + 2.4vw, 3rem); line-height: 1.1; color: var(--ts-navy-900); }
.blog-hero-sub { color: var(--ts-muted); font-size: var(--text-md); max-width: 60ch; margin: 0 auto var(--space-5); }
.blog-search {
  position: relative; display: flex; align-items: center; max-width: 640px; margin: 0 auto;
  background: var(--ts-white); border: 1px solid var(--ts-line); border-radius: var(--radius-pill);
  box-shadow: 0 10px 30px rgba(15, 27, 45, 0.08); transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.blog-search:focus-within { border-color: var(--ts-blue-750); box-shadow: 0 0 0 4px var(--ts-blue-tint-strong), 0 10px 30px rgba(15, 27, 45, 0.08); }
.blog-search > svg { position: absolute; left: 20px; width: 20px; height: 20px; color: var(--ts-muted); pointer-events: none; }
.blog-search input {
  flex: 1; min-width: 0; min-height: 56px; padding: 0 56px 0 52px; border: 0; border-radius: inherit; background: transparent;
  font: inherit; font-size: 1rem; color: var(--ts-ink);
}
.blog-search input:focus { outline: none; }
.blog-search input::placeholder { color: var(--ts-muted); }
.blog-search input::-webkit-search-cancel-button { cursor: pointer; }
.blog-search-kbd {
  position: absolute; right: 18px; font-family: var(--font-mono); font-size: var(--text-xs); color: var(--ts-muted);
  border: 1px solid var(--ts-line); border-radius: 6px; padding: 2px 8px; background: var(--ts-sky-25);
}
.blog-search:focus-within .blog-search-kbd { display: none; }
.blog-feed { margin: var(--space-4) 0 0; font-size: var(--text-sm); }
.blog-feed a { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; color: var(--ts-blue-750); font-weight: 600; text-decoration: none; }
.blog-feed a:hover { text-decoration: underline; }
.blog-feed svg { width: 16px; height: 16px; }

/* ---------- Filters + status ---------- */
.blog-list { padding-block: var(--space-6) var(--space-8); }
.blog-filters { display: none; flex-wrap: wrap; gap: 8px; margin-bottom: var(--space-4); }
.js .blog-filters, .blog-filters.is-ready { display: flex; }
.blog-chip {
  display: inline-flex; align-items: center; gap: 6px; min-height: 40px; padding: 6px 14px;
  font: inherit; font-size: var(--text-sm); font-weight: 600; color: var(--ts-navy-800);
  background: var(--ts-white); border: 1px solid var(--ts-line); border-radius: var(--radius-pill); cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.blog-chip:hover { border-color: var(--ts-blue-750); color: var(--ts-blue-750); }
.blog-chip:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }
.blog-chip[aria-pressed="true"] { background: var(--ts-navy-900); border-color: var(--ts-navy-900); color: var(--ts-white); }
.blog-chip-count { font-size: var(--text-xs); font-weight: 600; padding: 1px 7px; border-radius: var(--radius-pill); background: var(--ts-sky-100); color: var(--ts-navy-800); }
.blog-chip[aria-pressed="true"] .blog-chip-count { background: rgba(255, 255, 255, 0.18); color: var(--ts-white); }
/* Phones: one scrollable row of chips instead of a tall block. */
@media (max-width: 640px) {
  .blog-filters { flex-wrap: nowrap; overflow-x: auto; margin-inline: calc(-1 * var(--gutter, 16px)); padding: 2px var(--gutter, 16px) 8px; scrollbar-width: thin; }
  .blog-chip { flex: none; }
  .blog-search-kbd { display: none; }
  .blog-hero-sub { font-size: var(--text-base, 1rem); }
}
.blog-status { min-height: 1.5em; margin: 0 0 var(--space-4); font-size: var(--text-sm); color: var(--ts-muted); }

/* ---------- Card grid ---------- */
.blog-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-5); }
@media (max-width: 1024px) { .blog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .blog-grid { grid-template-columns: 1fr; } }

.blog-card {
  position: relative; display: flex; flex-direction: column; min-width: 0; padding: 0; gap: 0;
  background: var(--ts-white); border: 1px solid var(--ts-line-soft); border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-1);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.blog-card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(15, 27, 45, 0.12); border-color: var(--ts-blue-line); }
.blog-card:focus-within { border-color: var(--ts-blue-750); }
.blog-card[hidden] { display: none; }
.blog-card-media { aspect-ratio: 16 / 9; overflow: hidden; background: var(--ts-sky-100); }
.blog-card-media img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s var(--ease); }
.blog-card:hover .blog-card-media img { transform: scale(1.05); }
.blog-card-body { display: flex; flex-direction: column; gap: var(--space-2); flex: 1; padding: var(--space-5); }
.blog-card-top { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0; }
.blog-category {
  display: inline-block; font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 600; letter-spacing: 0.04em;
  color: var(--ts-blue-750); background: var(--ts-blue-tint); border: 1px solid var(--ts-blue-line); border-radius: var(--radius-pill); padding: 3px 10px;
}
.blog-featured-label {
  display: inline-block; font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ts-white); background: var(--ts-navy-900); border-radius: var(--radius-pill); padding: 4px 10px;
}
.blog-card-title { margin: var(--space-1) 0 0; font-size: 1.125rem; line-height: 1.35; font-weight: 700; }
.blog-card-title a { color: var(--ts-navy-900); text-decoration: none; }
.blog-card-title a::after { content: ""; position: absolute; inset: 0; z-index: 1; border-radius: inherit; }
.blog-card-title a:hover { color: var(--ts-blue-750); }
.blog-card-title a:focus-visible { outline: none; }
.blog-card-title a:focus-visible::after { outline: 3px solid var(--color-focus); outline-offset: -3px; }
.blog-excerpt {
  margin: 0; color: var(--ts-muted); font-size: 0.9375rem; line-height: 1.6; flex: 1;
  display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.blog-card-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: var(--space-2) 0 0; font-size: var(--text-sm); color: var(--ts-muted); }
.blog-author { font-weight: 600; color: var(--ts-navy-800); }

/* Featured: the first card, full width, image beside text (index only, not while searching). */
.blog-grid:not(.is-filtered) .blog-card--featured { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); }
.blog-grid:not(.is-filtered) .blog-card--featured .blog-card-media { aspect-ratio: auto; min-height: 340px; }
.blog-grid:not(.is-filtered) .blog-card--featured .blog-card-body { justify-content: center; padding: var(--space-7) var(--space-6); gap: var(--space-3); }
.blog-grid:not(.is-filtered) .blog-card--featured .blog-card-title { font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2.125rem); line-height: 1.2; }
.blog-grid:not(.is-filtered) .blog-card--featured .blog-excerpt { -webkit-line-clamp: 4; line-clamp: 4; font-size: var(--text-md); flex: none; }
.blog-grid.is-filtered .blog-featured-label { display: none; }
@media (max-width: 1024px) {
  .blog-grid:not(.is-filtered) .blog-card--featured { grid-template-columns: 1fr; }
  .blog-grid:not(.is-filtered) .blog-card--featured .blog-card-media { aspect-ratio: 16 / 9; min-height: 0; }
  .blog-grid:not(.is-filtered) .blog-card--featured .blog-card-body { padding: var(--space-5); }
}

/* Empty state + load more */
.blog-empty { text-align: center; padding: var(--space-7) var(--space-5); border: 1px dashed var(--ts-line); border-radius: var(--radius-lg); background: var(--ts-sky-25); }
.blog-empty h3 { margin: 0 0 var(--space-2); color: var(--ts-navy-900); }
.blog-empty p { margin: 0 0 var(--space-4); color: var(--ts-muted); }
.blog-empty-suggestions { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.blog-chip--clear { border-style: dashed; }
.blog-more { margin-top: var(--space-7); text-align: center; }
.blog-more[hidden] { display: none; }

/* ---------- CTA ---------- */
.blog-cta { padding-block: 0 var(--space-8); }
.blog-cta-card {
  display: grid; grid-template-columns: minmax(0, 1.6fr) auto; align-items: center; gap: var(--space-6);
  padding: var(--space-7); border-radius: var(--radius-lg);
  background: radial-gradient(120% 140% at 100% 0%, rgba(0, 167, 239, 0.22) 0%, rgba(0, 167, 239, 0) 55%), linear-gradient(135deg, var(--ts-navy-900) 0%, var(--ts-blue-900) 100%);
  color: var(--ts-on-dark);
}
.blog-cta-card .badge { color: var(--ts-on-dark-blue); }
.blog-cta-card h2 { color: var(--ts-on-dark); margin: var(--space-2) 0 var(--space-3); }
.blog-cta-card h2 .blue { color: var(--ts-on-dark-blue); }
.blog-cta-card p { color: var(--ts-on-dark-muted); margin: 0; max-width: 56ch; }
.blog-cta-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.blog-cta-actions .btn-outline { background: transparent; color: var(--ts-on-dark); border-color: rgba(255, 255, 255, 0.5); }
.blog-cta-actions .btn-outline:hover { background: rgba(255, 255, 255, 0.08); color: var(--ts-on-dark); border-color: var(--ts-on-dark); }
.blog-cta-actions svg { width: 18px; height: 18px; }
@media (max-width: 800px) { .blog-cta-card { grid-template-columns: 1fr; padding: var(--space-6) var(--space-5); } }

/* ---------- Article: cover ---------- */
.post-cover { margin: 0 0 var(--space-6); }
.post-cover img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border-radius: var(--radius-lg); background: var(--ts-sky-100); }
.post-cover-credit { margin-top: var(--space-2); font-size: var(--text-xs); color: var(--ts-muted); }
.post-cover-credit a { color: var(--ts-blue-750); }
/* Hand-written posts sit in a 780px column: let the cover run wider. */
.bp-wrap .post-cover { width: min(1080px, calc(100vw - 32px)); margin-left: 50%; transform: translateX(-50%); margin-bottom: 40px; }

/* Byline photo (generated articles) */
.byline-photo { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; flex: none; border: 1px solid var(--ts-blue-line); background: var(--ts-white); }

/* ---------- Article: layout + TOC ---------- */
.article--toc { max-width: 1080px; }
.article--toc .article-header { max-width: 720px; margin-inline: auto; }
.article--toc .article-layout { display: grid; grid-template-columns: 240px minmax(0, 720px); gap: var(--space-7); justify-content: center; align-items: start; }
.article--toc .toc { position: sticky; top: 96px; }
@media (max-width: 1080px) {
  .article--toc .article-layout { grid-template-columns: minmax(0, 720px); }
  .article--toc .toc { position: static; }
}
.toc { margin: 0 0 var(--space-6); padding: var(--space-4) var(--space-5); background: var(--ts-sky-25); border: 1px solid var(--ts-line-soft); border-radius: var(--radius-md); font-size: var(--text-sm); }
.toc-title { margin: 0 0 var(--space-2); font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ts-muted); }
.toc ol { margin: 0; padding-left: 1.2em; display: grid; gap: 6px; }
.toc a { color: var(--ts-navy-800); text-decoration: none; line-height: 1.4; display: inline-block; padding-block: 2px; }
.toc a:hover, .toc a[aria-current="true"] { color: var(--ts-blue-750); text-decoration: underline; }
.bp-body h2[id] { scroll-margin-top: 96px; }

/* Readable measure and callouts for article bodies. */
.article-body, .bp-body { max-width: 72ch; }
.article-body blockquote, .bp-quick { box-shadow: inset 0 0 0 1px var(--ts-blue-line); }
.bp-body table, .article-body table { font-variant-numeric: tabular-nums; }

/* ---------- Article: share ---------- */
.share { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3); margin: var(--space-6) 0 0; padding-top: var(--space-5); border-top: 1px solid var(--ts-line-soft); }
.share-label { margin: 0; font-size: var(--text-sm); font-weight: 700; color: var(--ts-navy-900); }
.share-list { display: flex; gap: 8px; list-style: none; margin: 0; padding: 0; }
.share-btn {
  display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; padding: 0;
  border-radius: 50%; border: 1px solid var(--ts-line); background: var(--ts-white); color: var(--ts-navy-800); cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.share-btn:hover { background: var(--ts-navy-900); border-color: var(--ts-navy-900); color: var(--ts-white); }
.share-btn:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }
.share-btn svg { width: 18px; height: 18px; }
.share-status { margin: 0; font-size: var(--text-sm); color: var(--ts-success-ink); min-height: 1.2em; }

/* ---------- Article: author card ---------- */
.author-card {
  display: flex; gap: var(--space-4); align-items: flex-start; margin: var(--space-6) 0 0; padding: var(--space-5);
  background: var(--ts-sky-25); border: 1px solid var(--ts-line-soft); border-radius: var(--radius-lg);
}
.author-card-photo { width: 72px; height: 72px; border-radius: 50%; object-fit: cover; flex: none; background: var(--ts-white); border: 1px solid var(--ts-blue-line); }
.author-card-label { margin: 0; font-size: var(--text-xs); font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ts-muted); }
.author-card-name { margin: 2px 0 var(--space-2); font-size: var(--text-md); font-weight: 700; color: var(--ts-navy-900); }
.author-card-title { font-weight: 500; color: var(--ts-muted); font-size: var(--text-sm); }
.author-card-bio { margin: 0; font-size: var(--text-sm); color: var(--ts-ink); line-height: 1.6; }
@media (max-width: 480px) { .author-card { flex-direction: column; } }

/* ---------- Related articles ---------- */
.related-posts { margin-top: var(--space-8); padding-top: var(--space-7); border-top: 1px solid var(--ts-line-soft); }
.related-posts h2 { font-size: var(--text-2xl); margin: 0 0 var(--space-5); color: var(--ts-navy-900); }
.related-posts .related-more { margin-top: var(--space-6); text-align: center; }
.blog-grid--related .blog-card-body { padding: var(--space-4); }
.blog-grid--related .blog-card-title { font-size: 1rem; }
/* Inside the 780px hand-written column: break out to the page width. */
.bp-wrap .related-posts { width: min(1080px, calc(100vw - 32px)); margin-left: 50%; transform: translateX(-50%); margin-bottom: var(--space-6); }
.bp-wrap .share, .bp-wrap .author-card { margin-bottom: var(--space-6); }

@media (prefers-reduced-motion: reduce) {
  .blog-card, .blog-card-media img, .blog-chip, .share-btn { transition: none; }
  .blog-card:hover { transform: none; }
  .blog-card:hover .blog-card-media img { transform: none; }
}