/* ==========================================================================
   MAS Research — Blog / article styles  (self-contained: /blog/)
   Uses the site's design tokens so it matches the theme.
   Load this AFTER ../assets/css/main.css on blog article pages.
   ========================================================================== */

.blog-article { padding-bottom: var(--space-12); }

/* Header */
.blog-header { max-width: 780px; }
.blog-meta-top { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-2); }
.blog-tag {
  font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600;
  letter-spacing: 0.03em; text-transform: uppercase;
  color: var(--signal-ink); background: rgba(14,107,87,0.10);
  padding: 4px 10px; border-radius: 5px;
}
.blog-readtime { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-secondary); }
.blog-standfirst {
  font-family: var(--font-body); font-size: 1.18rem; line-height: 1.55;
  color: var(--text-secondary); margin: var(--space-4) 0 var(--space-4);
}
.blog-byline {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2);
  font-size: 0.85rem; color: var(--text-secondary);
  padding-top: var(--space-4); border-top: 1px solid var(--border);
}

/* Body */
.blog-body { max-width: 720px; margin-top: var(--space-8); }
.blog-body h2 {
  font-family: var(--font-display); font-size: 1.55rem; line-height: 1.2;
  margin: var(--space-9) 0 var(--space-3); color: var(--text-primary);
}
.blog-body p {
  font-size: 1.03rem; line-height: 1.7; color: var(--text-primary);
  margin: 0 0 var(--space-4);
}
.blog-body a { color: var(--signal-ink); text-underline-offset: 2px; }
.blog-body a:hover { text-decoration: underline; }
.blog-body strong { color: var(--text-primary); font-weight: 600; }
.blog-steps {
  margin: var(--space-4) 0 var(--space-6); padding-left: 1.4rem;
  display: flex; flex-direction: column; gap: var(--space-3);
}
.blog-steps li { font-size: 1.03rem; line-height: 1.6; color: var(--text-primary); padding-left: 0.3rem; }
.blog-steps li::marker { color: var(--signal-ink); font-family: var(--font-mono); font-weight: 600; }

/* FAQ */
.blog-faq { max-width: 780px; margin-top: var(--space-11); }
.blog-faq h2 { font-family: var(--font-display); font-size: 1.55rem; margin-bottom: var(--space-4); }

/* CTA + related */
.blog-cta-band { margin-top: var(--space-11); }
.blog-related { max-width: 1100px; margin-top: var(--space-11); }
.blog-related h2 { margin-bottom: var(--space-4); }

@media (max-width: 720px) {
  .blog-body h2 { font-size: 1.35rem; }
  .blog-standfirst { font-size: 1.06rem; }
}

/* Blog hub — featured post card */
.featured-post {
  display: block; text-decoration: none;
  border: 1px solid var(--border-strong); border-left: 4px solid var(--signal);
  border-radius: var(--radius-lg); background: var(--bg-raised);
  padding: var(--space-6);
}
.featured-post .blog-tag { display: inline-block; margin-bottom: var(--space-2); }
.featured-post h2 { color: var(--text-primary); }
.featured-post p { color: var(--text-secondary); line-height: 1.6; margin: var(--space-2) 0 var(--space-3); }
.featured-post:hover { border-color: var(--signal); }

/* Blog hub — listing page */
.featured-post--lg { padding: var(--space-8); }
.featured-post-meta { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-3); }
.featured-post-title { font-family: var(--font-display); font-size: 1.6rem; line-height: 1.2; color: var(--text-primary); margin: 0 0 var(--space-2); }
.featured-post--lg p { font-size: 1.05rem; }

.post-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0; }
.post-list-item { border-bottom: 1px solid var(--border); }
.post-list-item:first-child { border-top: 1px solid var(--border); }
.post-list-link {
  display: grid; grid-template-columns: 160px 1fr auto; align-items: baseline;
  gap: var(--space-3) var(--space-5); padding: var(--space-5) 0; text-decoration: none;
}
.post-list-tag { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; color: var(--signal-ink); }
.post-list-title { font-family: var(--font-display); font-size: 1.15rem; color: var(--text-primary); grid-column: 2; }
.post-list-desc { grid-column: 2; font-size: 0.92rem; color: var(--text-secondary); line-height: 1.5; margin-top: 4px; }
.post-list-date { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-secondary); text-align: right; }
.post-list-link:hover .post-list-title { color: var(--signal-ink); text-decoration: underline; }
.post-list-more { margin-top: var(--space-6); color: var(--text-secondary); font-size: 0.95rem; }
.post-list-more a, .post-list-tag a { color: var(--signal-ink); }

@media (max-width: 640px) {
  .post-list-link { grid-template-columns: 1fr; gap: 4px; }
  .post-list-title, .post-list-desc { grid-column: 1; }
  .post-list-date { text-align: left; }
  .featured-post-title { font-size: 1.3rem; }
}

/* ==========================================================================
   Blog redesign — cover images, post-grid cards, featured media
   ========================================================================== */

/* Article hero cover */
.blog-cover {
  margin: var(--space-6) 0 0; max-width: 860px; border-radius: var(--radius-lg);
  overflow: hidden; border: 1px solid var(--border-strong); background: var(--bg-sunken);
}
.blog-cover img { display: block; width: 100%; height: auto; }

/* Featured latest-article card (with media) */
.featured-post--lg { display: grid; grid-template-columns: 1.1fr 1fr; gap: 0; padding: 0; overflow: hidden; }
.featured-post-media { background: var(--bg-sunken); border-right: 1px solid var(--border); }
.featured-post-media img { display: block; width: 100%; height: 100%; object-fit: cover; }
.featured-post-content { padding: var(--space-7); display: flex; flex-direction: column; }
.featured-post--lg .featured-post-title { margin: var(--space-1) 0 var(--space-2); }
.featured-post--lg p { font-size: 1rem; color: var(--text-secondary); line-height: 1.6; margin: 0 0 var(--space-4); flex: 1; }

/* Post grid (All articles) */
.post-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
.post-card {
  display: flex; flex-direction: column; text-decoration: none;
  border: 1px solid var(--border-strong); border-radius: var(--radius-lg);
  overflow: hidden; background: var(--bg-raised);
  transition: border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.post-card:hover { border-color: var(--signal); transform: translateY(-2px); }
.post-card-media { background: var(--bg-sunken); border-bottom: 1px solid var(--border); aspect-ratio: 16 / 9; overflow: hidden; }
.post-card-media img { display: block; width: 100%; height: 100%; object-fit: cover; }
.post-card-body { padding: var(--space-5) var(--space-5) var(--space-6); display: flex; flex-direction: column; gap: var(--space-2); flex: 1; }
.post-card-tag {
  font-family: var(--font-mono); font-size: 0.7rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.03em; color: var(--signal-ink); align-self: flex-start;
  background: rgba(14,107,87,0.10); padding: 3px 8px; border-radius: 5px;
}
.post-card-title { font-family: var(--font-display); font-size: 1.2rem; line-height: 1.25; color: var(--text-primary); margin: 4px 0 0; }
.post-card-desc { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.55; margin: 0; flex: 1; }
.post-card-meta { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-secondary); display: flex; gap: 8px; margin-top: var(--space-2); }

@media (max-width: 860px) {
  .featured-post--lg { grid-template-columns: 1fr; }
  .featured-post-media { border-right: none; border-bottom: 1px solid var(--border); aspect-ratio: 16 / 9; }
}
@media (max-width: 680px) {
  .post-grid { grid-template-columns: 1fr; }
}

/* Callout / info box (used inside articles) */
.callout-box {
  display: flex; align-items: flex-start; gap: var(--space-4);
  margin: var(--space-6) 0;
  padding: var(--space-5) var(--space-6);
  background: var(--bg-sunken);
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--signal);
  border-radius: 10px;
}
.callout-box svg { width: 24px; height: 24px; flex: 0 0 24px; color: var(--signal-ink); margin-top: 2px; }
.callout-box p { margin: 0; font-size: 0.98rem; line-height: 1.6; color: var(--text-primary); }
.callout-box strong { color: var(--signal-ink); }

/* Article hero — two-column (text left, cover image right) */
.blog-hero-grid {
  display: grid; grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-8); align-items: center;
  margin-bottom: var(--space-4);
}
.blog-hero-grid .blog-header { max-width: none; margin: 0; }
.blog-hero-grid .blog-cover {
  margin: 0; align-self: stretch;
  display: flex; align-items: center;
}
.blog-hero-grid .blog-cover img { width: 100%; height: auto; }
@media (max-width: 880px) {
  .blog-hero-grid { grid-template-columns: 1fr; gap: var(--space-5); }
  .blog-hero-grid .blog-cover { order: -1; }  /* image above text on mobile */
}

/* ==========================================================================
   Article layout — content + sticky sidebar
   ========================================================================== */
.blog-layout {
  display: grid; grid-template-columns: minmax(0, 1fr) 300px;
  gap: var(--space-9); align-items: start; margin-top: var(--space-8);
}
.blog-main { min-width: 0; }
.blog-main .blog-body { max-width: 100%; margin-top: 0; }

/* Sidebar */
.blog-sidebar { position: sticky; top: calc(var(--header-h, 68px) + var(--space-5)); display: flex; flex-direction: column; gap: var(--space-4); }
.blog-side-card {
  border: 1px solid var(--border-strong); border-radius: var(--radius-lg);
  background: var(--bg-raised); padding: var(--space-5);
}
.blog-side-title { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--signal-ink); margin: 0 0 var(--space-3); }
.blog-takeaways ul { margin: 0; padding-left: 1.05rem; display: flex; flex-direction: column; gap: var(--space-2); }
.blog-takeaways li { font-size: 0.88rem; line-height: 1.5; color: var(--text-secondary); }
.blog-takeaways li::marker { color: var(--signal); }
.blog-toc ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.blog-toc li { margin: 0; }
.blog-toc a {
  display: block; font-size: 0.86rem; line-height: 1.4; color: var(--text-secondary);
  text-decoration: none; padding: 6px 10px; border-left: 2px solid var(--border);
  border-radius: 0 5px 5px 0; transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.blog-toc a:hover { color: var(--signal-ink); border-left-color: var(--signal); background: var(--bg-sunken); }
.blog-side-cta p { font-size: 0.88rem; line-height: 1.55; color: var(--text-secondary); margin: 0 0 var(--space-3); }

/* Inline figure in body */
.blog-inline-fig { margin: var(--space-6) 0; }
.blog-inline-fig img { display: block; width: 100%; height: auto; border: 1px solid var(--border-strong); border-radius: var(--radius-lg); background: var(--bg-sunken); }
.blog-inline-fig figcaption { font-size: 0.82rem; color: var(--text-secondary); margin-top: var(--space-2); font-style: italic; text-align: center; }

/* smooth scroll + offset for anchor jumps */
html { scroll-behavior: smooth; }
.blog-body h2 { scroll-margin-top: calc(var(--header-h, 68px) + var(--space-4)); }

@media (max-width: 940px) {
  .blog-layout { grid-template-columns: 1fr; gap: var(--space-6); }
  .blog-sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .blog-side-card { flex: 1 1 240px; }
  .blog-toc { display: none; }  /* TOC less useful when not sticky on mobile */
}
@media (max-width: 560px) {
  .blog-sidebar { flex-direction: column; }
}

/* Article inline disclaimer note */
.blog-note { font-size: 0.9rem; color: var(--text-secondary); border-top: 1px solid var(--border); padding-top: var(--space-4); margin-top: var(--space-6); }

/* Blog hub — pagination controls */
.blog-pagination { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: var(--space-12); padding-top: var(--space-4); }
.blog-page-btn {
  font-family: var(--font-mono); font-size: 1rem; font-weight: 600;
  min-width: 52px; padding: 0.7rem 1.1rem;
  border: 2px solid var(--border-strong); border-radius: 10px;
  background: var(--bg-raised); color: var(--text-primary); cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.blog-page-btn:hover:not(:disabled):not(.is-active) { border-color: var(--signal); color: var(--signal-ink); background: var(--bg-sunken); }
.blog-page-btn.is-active { background: var(--signal); border-color: var(--signal); color: #fff; cursor: default; }
.blog-page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* Article — back-to-index link + prev/next navigation */
.blog-backlink-row { margin-top: var(--space-5); }
.blog-backlink {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 0.85rem; font-weight: 600;
  color: var(--signal-ink); text-decoration: none;
}
.blog-backlink svg { width: 16px; height: 16px; }
.blog-backlink:hover { text-decoration: underline; }

.postnav {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4);
  margin-top: var(--space-11); padding-top: var(--space-6);
  border-top: 1px solid var(--border);
}
.postnav-link {
  display: flex; flex-direction: column; gap: 6px;
  padding: var(--space-5); text-decoration: none;
  border: 1px solid var(--border-strong); border-radius: var(--radius-lg);
  background: var(--bg-raised);
  transition: border-color var(--dur-fast) var(--ease);
}
.postnav-link:hover { border-color: var(--signal); }
.postnav-next { text-align: right; }
.postnav-dir {
  display: inline-flex; align-items: center; gap: 5px;
  font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-secondary);
}
.postnav-next .postnav-dir { justify-content: flex-end; }
.postnav-dir svg { width: 15px; height: 15px; }
.postnav-title { font-family: var(--font-display); font-size: 1.02rem; line-height: 1.3; color: var(--text-primary); }
.postnav-empty { border: none; background: none; padding: 0; }
@media (max-width: 640px) {
  .postnav { grid-template-columns: 1fr; }
  .postnav-next, .postnav-next .postnav-dir { text-align: left; justify-content: flex-start; }
  .postnav-empty { display: none; }
}