/*
 * xtendedsystems.com — blog article styles
 * Mirrors the XSI LodeStone blog-article layout in the cream/crimson brand.
 * Loaded as /assets/blog-article.css on every /blog/<slug>/ page.
 * Depends on /layout-styles.css for :root tokens + nav/footer/btn base.
 */

/* ── READING PROGRESS ── */
.reading-progress {
  position: fixed; top: 0; left: 0; height: 2px;
  background: var(--crimson); z-index: 300;
  transition: width 0.1s linear; width: 0%;
}

/* ── BREADCRUMB ── */
.site-breadcrumb {
  background: var(--cream-soft);
  border-bottom: 1px solid var(--cream-rule);
  padding: 0.75rem clamp(1.5rem, 5vw, 5rem);
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.8rem; color: var(--carbon-soft);
  margin-top: 64px; /* nav height */
}
.site-breadcrumb a { color: var(--carbon-soft); text-decoration: none; transition: color 0.2s; }
.site-breadcrumb a:hover { color: var(--carbon); }
.site-breadcrumb .breadcrumb-sep { color: var(--cream-rule); }

/* ── BLOG HEADER ── */
.blog-header {
  /* match the site's section gutter so the hero left-edge lines up with the
     rest of xtendedsystems.com (nav, breadcrumb, page content), not a private box */
  padding: clamp(3rem, 8vw, 5rem) max(var(--pad-x), calc((100vw - var(--maxw)) / 2)) 2.5rem;
}
.blog-header > * { max-width: 680px; }
.blog-category {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--crimson); margin-bottom: 1.5rem;
  font-family: var(--sans);
}
.blog-category::before {
  content: ''; display: block; width: 20px; height: 1px; background: var(--crimson);
}
.blog-headline {
  font-family: var(--serif);
  font-size: clamp(1.85rem, 4.5vw, 3rem);
  line-height: 1.18; color: var(--carbon);
  margin-bottom: 1.25rem; letter-spacing: -0.015em;
  font-weight: 400;
}
.blog-headline em { font-style: italic; color: var(--metal-dark); }
.blog-deck {
  font-size: 1.1rem; line-height: 1.65;
  color: var(--carbon-soft); font-weight: 300;
  margin-bottom: 2rem; max-width: 660px;
}

/* ── AUTHOR MINI ── */
.author-mini {
  display: flex; align-items: center; gap: 0.875rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--cream-rule);
  border-bottom: 1px solid var(--cream-rule);
}
.author-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--crimson-hi), #3a1018);
  border: 1.5px solid rgba(138,21,33,0.3);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--sans); font-weight: 700; font-size: 0.8rem;
  color: var(--cream); flex-shrink: 0;
}
.author-meta { flex: 1; }
.author-name-link {
  font-weight: 500; font-size: 0.9rem; color: var(--carbon);
  text-decoration: none; display: flex; align-items: center; gap: 0.4rem;
}
.author-name-link:hover { color: var(--crimson); }
.author-name-link svg { width: 14px; height: 14px; opacity: 0.5; }
.author-byline-meta { font-size: 0.8rem; color: var(--carbon-soft); margin-top: 2px; }
.post-share { display: flex; gap: 0.75rem; align-items: center; }
.share-btn {
  background: var(--cream-soft);
  border: 1px solid var(--cream-rule);
  color: var(--carbon-soft); font-size: 0.75rem; font-weight: 500;
  padding: 0.3rem 0.75rem; border-radius: 4px; text-decoration: none;
  display: flex; align-items: center; gap: 0.35rem;
  cursor: pointer; transition: all 0.2s; font-family: var(--sans);
}
.share-btn:hover { background: var(--cream); border-color: var(--carbon-soft); color: var(--carbon); }
.share-btn.linkedin { border-color: rgba(10,102,194,0.3); }
.share-btn.linkedin:hover { border-color: #0a66c2; color: #0a66c2; }

/* ── ARTICLE LAYOUT ── */
.article-layout {
  /* same site gutter as .blog-header so body copy + sidebar align to the site rhythm */
  padding-inline: max(var(--pad-x), calc((100vw - var(--maxw)) / 2));
  display: grid; grid-template-columns: 1fr 300px;
  gap: 4rem; align-items: start;
}
@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; gap: 2.5rem; }
  .article-sidebar { order: -1; }
}

/* ── ARTICLE BODY ── */
.article-body { max-width: 680px; padding-bottom: 4rem; }
.article-body h2 {
  font-family: var(--sans); font-size: 1.25rem; font-weight: 600;
  color: var(--carbon); margin: 2.5rem 0 0.875rem; letter-spacing: -0.01em;
}
.article-body h3 {
  font-family: var(--sans); font-size: 1rem; font-weight: 600;
  color: var(--carbon); margin: 1.75rem 0 0.625rem;
}
.article-body p { color: var(--carbon-soft); margin-bottom: 1.25rem; font-weight: 300; }
.article-body p strong { color: var(--carbon); font-weight: 500; }
.article-body ul, .article-body ol {
  margin: 0 0 1.25rem 1.5rem; color: var(--carbon-soft); font-weight: 300;
}
.article-body li { margin-bottom: 0.5rem; }

/* CALLOUT */
.callout {
  border-left: 3px solid var(--crimson);
  background: var(--shadow-soft);
  border-radius: 0 6px 6px 0;
  padding: 1rem 1.25rem; margin: 1.75rem 0;
}
.callout p { color: var(--carbon-soft); margin-bottom: 0; font-style: italic; }
.callout strong { color: var(--carbon); font-style: normal; }

/* ── QA SECTION ── */
.qa-section {
  margin: 3rem 0; border-top: 1px solid var(--cream-rule); padding-top: 2.5rem;
}
.section-label {
  font-family: var(--sans); font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--crimson);
  margin-bottom: 1.25rem; display: flex; align-items: center; gap: 0.5rem;
}
.section-label::before { content: ''; display: block; width: 16px; height: 1px; background: var(--crimson); }
.section-title {
  font-family: var(--serif); font-size: 1.5rem; font-weight: 400;
  color: var(--carbon); margin-bottom: 0.5rem; letter-spacing: -0.01em;
  margin-top: 0;
}
.section-subtitle { color: var(--carbon-soft); font-size: 0.9rem; margin-bottom: 2rem; }

.qa-item {
  border: 1px solid var(--cream-rule); border-radius: 8px;
  margin-bottom: 1rem; overflow: hidden; transition: border-color 0.2s;
  background: var(--cream-soft);
}
.qa-item:hover { border-color: rgba(138,21,33,0.3); }
.qa-question {
  display: flex; align-items: flex-start; gap: 1rem; padding: 1.25rem;
  cursor: pointer; user-select: none; width: 100%; background: none; border: none; text-align: left;
}
.qa-q-badge {
  width: 28px; height: 28px; border-radius: 4px; background: var(--crimson);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--sans); font-size: 0.75rem; font-weight: 700;
  color: var(--cream); flex-shrink: 0; margin-top: 2px;
}
.qa-q-text { flex: 1; font-weight: 500; font-size: 0.975rem; color: var(--carbon); line-height: 1.45; }
.qa-chevron {
  width: 20px; height: 20px; flex-shrink: 0;
  color: var(--carbon-soft); transition: transform 0.25s; margin-top: 4px;
}
.qa-item.open .qa-chevron { transform: rotate(180deg); }
.qa-answer {
  display: none; padding: 0 1.25rem 1.25rem 4rem;
  color: var(--carbon-soft); font-size: 0.925rem; font-weight: 300;
  line-height: 1.7; border-top: 1px solid var(--cream-rule);
}
.qa-item.open .qa-answer { display: block; padding-top: 1rem; }
.qa-answer p { margin-bottom: 0.75rem; color: var(--carbon-soft); }
.qa-answer p:last-child { margin-bottom: 0; }

/* ── FAQ SECTION ── */
.faq-section { margin: 3rem 0; border-top: 1px solid var(--cream-rule); padding-top: 2.5rem; }
.faq-item { border-bottom: 1px solid var(--cream-rule); padding: 0; }
.faq-item:first-of-type { border-top: 1px solid var(--cream-rule); }
.faq-trigger {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 1rem; padding: 1.125rem 0; cursor: pointer;
  background: none; border: none; width: 100%; text-align: left;
}
.faq-q { font-weight: 500; font-size: 0.95rem; color: var(--carbon); line-height: 1.45; }
.faq-icon {
  width: 20px; height: 20px; flex-shrink: 0;
  color: var(--carbon-soft); transition: transform 0.25s; margin-top: 2px;
}
.faq-item.open .faq-icon { transform: rotate(45deg); color: var(--crimson); }
.faq-answer {
  display: none; padding-bottom: 1.25rem;
  color: var(--carbon-soft); font-size: 0.9rem; font-weight: 300; line-height: 1.7;
}
.faq-item.open .faq-answer { display: block; }
.faq-answer strong { color: var(--carbon); font-weight: 500; }

/* ── AUTHOR BIO ── */
.author-bio-section { margin: 3.5rem 0 0; border-top: 1px solid var(--cream-rule); padding-top: 2.5rem; }
.author-bio-card {
  background: var(--cream-soft); border: 1px solid var(--cream-rule);
  border-radius: 10px; padding: 2rem;
  display: grid; grid-template-columns: auto 1fr; gap: 1.75rem; align-items: start;
}
@media (max-width: 600px) { .author-bio-card { grid-template-columns: 1fr; } }
.author-portrait {
  width: 80px; height: 80px; border-radius: 50%;
  background: linear-gradient(135deg, var(--crimson-hi), #3a1018);
  border: 2px solid rgba(138,21,33,0.3);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--sans); font-size: 1.5rem; font-weight: 700;
  color: var(--cream); flex-shrink: 0;
}
.author-bio-name {
  font-family: var(--sans); font-size: 1.1rem; font-weight: 600; color: var(--carbon);
  margin-bottom: 0.2rem; display: flex; align-items: center; gap: 0.75rem;
}
.author-bio-title { font-size: 0.825rem; color: var(--crimson); font-weight: 500; letter-spacing: 0.04em; margin-bottom: 1rem; }
.author-bio-text { font-size: 0.9rem; color: var(--carbon-soft); font-weight: 300; line-height: 1.7; margin-bottom: 1rem; }
.author-bio-links { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1rem; }
.bio-link {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-size: 0.8rem; font-weight: 500; color: var(--carbon-soft);
  text-decoration: none; border: 1px solid var(--cream-rule);
  padding: 0.3rem 0.75rem; border-radius: 4px; transition: all 0.2s;
  background: var(--cream);
}
.bio-link:hover { border-color: var(--carbon-soft); color: var(--carbon); }
.bio-link.linkedin-link { border-color: rgba(10,102,194,0.3); }
.bio-link.linkedin-link:hover { border-color: #0a66c2; color: #0a66c2; }
.bio-link svg { width: 14px; height: 14px; }

/* ── SIDEBAR ── */
.article-sidebar { position: sticky; top: 84px; }
.sidebar-card {
  background: var(--cream-soft); border: 1px solid var(--cream-rule);
  border-radius: 10px; padding: 1.5rem; margin-bottom: 1.25rem;
}
.sidebar-label {
  font-family: var(--sans); font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--crimson); margin-bottom: 0.75rem;
}
.sidebar-card h4 {
  font-family: var(--sans); font-size: 0.975rem; font-weight: 600;
  color: var(--carbon); margin-bottom: 0.5rem; line-height: 1.3;
}
.sidebar-card p {
  font-size: 0.825rem; color: var(--carbon-soft); font-weight: 300;
  line-height: 1.6; margin-bottom: 1rem;
}
.whitepaper-cta {
  background: linear-gradient(135deg, rgba(138,21,33,0.06) 0%, var(--cream-soft) 100%);
  border-color: rgba(138,21,33,0.2);
}
.whitepaper-cta .sidebar-label { color: var(--crimson); }
.wp-form { display: flex; flex-direction: column; gap: 0.625rem; }
.wp-form input {
  background: var(--cream); border: 1px solid var(--cream-rule);
  color: var(--carbon); font-family: var(--sans); font-size: 0.85rem;
  padding: 0.6rem 0.875rem; border-radius: 4px; width: 100%; outline: none;
  transition: border-color 0.2s;
}
.wp-form input::placeholder { color: var(--carbon-soft); opacity: 0.6; }
.wp-form input:focus { border-color: var(--crimson); }
.wp-submit {
  background: var(--crimson); color: var(--cream);
  font-family: var(--sans); font-size: 0.825rem; font-weight: 600;
  letter-spacing: 0.04em; padding: 0.65rem 1rem; border: none;
  border-radius: 4px; cursor: pointer; transition: background 0.2s; width: 100%;
}
.wp-submit:hover { background: var(--crimson-hi); }
.wp-privacy { font-size: 0.7rem; color: var(--carbon-soft); text-align: center; margin-top: 0.25rem; }
.linkedin-cross { border-color: rgba(10,102,194,0.2); }
.linkedin-cross .sidebar-label { color: #0a66c2; }
.linkedin-profile-row {
  display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem;
  background: rgba(10,102,194,0.05); border-radius: 6px; text-decoration: none;
  border: 1px solid rgba(10,102,194,0.15); margin-bottom: 0.75rem; transition: all 0.2s;
}
.linkedin-profile-row:hover { border-color: rgba(10,102,194,0.4); background: rgba(10,102,194,0.1); }
.li-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--crimson-hi), #3a1018);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--sans); font-weight: 700; font-size: 0.7rem;
  color: var(--cream); flex-shrink: 0;
}
.li-meta { flex: 1; min-width: 0; }
.li-name { font-size: 0.825rem; font-weight: 500; color: var(--carbon); }
.li-title { font-size: 0.72rem; color: var(--carbon-soft); margin-top: 1px; }
.li-page-btn {
  display: flex; align-items: center; justify-content: center; gap: 0.5rem;
  width: 100%; background: rgba(10,102,194,0.07);
  border: 1px solid rgba(10,102,194,0.2); border-radius: 4px;
  padding: 0.55rem 0.875rem; font-size: 0.8rem; font-weight: 500;
  color: #0a66c2; text-decoration: none; transition: all 0.2s;
}
.li-page-btn:hover { background: rgba(10,102,194,0.15); border-color: rgba(10,102,194,0.45); }
.related-post-item {
  display: flex; gap: 0.75rem; padding: 0.75rem 0;
  border-bottom: 1px solid var(--cream-rule); text-decoration: none; transition: opacity 0.2s;
}
.related-post-item:last-child { border-bottom: none; }
.related-post-item:hover { opacity: 0.75; }
.related-cat { font-size: 0.65rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--crimson); margin-bottom: 0.25rem; }
.related-title { font-size: 0.825rem; font-weight: 500; color: var(--carbon); line-height: 1.4; }

/* XST internal CTA sidebar card */
.xst-cta-card { border-color: rgba(138,21,33,0.2); }
.xst-learn-btn {
  display: inline-block; background: var(--cream);
  border: 1px solid var(--crimson); border-radius: 4px;
  padding: 0.45rem 0.875rem; font-size: 0.825rem; font-weight: 500;
  color: var(--crimson); text-decoration: none; transition: all 0.2s;
}
.xst-learn-btn:hover { background: var(--crimson); color: var(--cream); }

/* ── BOTTOM CTA ── */
.article-cta-banner {
  background: linear-gradient(135deg, var(--cream-soft) 0%, var(--cream) 100%);
  border-top: 1px solid rgba(138,21,33,0.2);
  border-bottom: 1px solid var(--cream-rule);
  padding: clamp(2.5rem, 6vw, 4rem) clamp(1.5rem, 5vw, 5rem);
  margin-top: 2rem; text-align: center;
}
.cta-eyebrow {
  font-family: var(--sans); font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--crimson); margin-bottom: 1rem;
}
.cta-headline {
  font-family: var(--serif); font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  color: var(--carbon); margin-bottom: 0.75rem; line-height: 1.2; font-weight: 400;
}
.cta-sub { color: var(--carbon-soft); font-size: 1rem; font-weight: 300; max-width: 520px; margin: 0 auto 2rem; }
.cta-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  background: var(--crimson); color: var(--cream);
  font-family: var(--sans); font-size: 0.875rem; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  padding: 0.8rem 1.75rem; border-radius: 4px; text-decoration: none;
  transition: background 0.2s; display: inline-block;
}
.btn-primary:hover { background: var(--crimson-hi); }
.btn-secondary {
  background: transparent; color: var(--carbon-soft);
  font-family: var(--sans); font-size: 0.875rem; font-weight: 500;
  letter-spacing: 0.05em; text-transform: uppercase;
  padding: 0.8rem 1.75rem; border: 1px solid var(--cream-rule);
  border-radius: 4px; text-decoration: none; transition: all 0.2s; display: inline-block;
}
.btn-secondary:hover { border-color: var(--carbon-soft); color: var(--carbon); }

/* ── BLOG INDEX (blog/index.html) ── */
.blog-index-wrap {
  /* same gutter as .article-layout so cards left-edge aligns to site rhythm */
  padding-inline: max(var(--pad-x), calc((100vw - var(--maxw)) / 2));
}
.blog-index-hero {
  padding: clamp(3rem, 8vw, 5rem) 0 2.5rem;
}
.blog-index-eye {
  font-family: var(--sans); font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--crimson);
  display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1.25rem;
}
.blog-index-eye::before {
  content: ''; display: block; width: 20px; height: 1px; background: var(--crimson);
}
.blog-index-h1 {
  font-family: var(--serif); font-size: clamp(1.85rem, 4.5vw, 3rem);
  line-height: 1.18; color: var(--carbon); margin-bottom: 1rem;
  letter-spacing: -0.015em; font-weight: 400;
}
.blog-index-deck {
  font-size: 1.05rem; line-height: 1.65;
  color: var(--carbon-soft); font-weight: 300;
  max-width: 560px; margin-bottom: 2.5rem;
}
/* CARD GRID */
.blog-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  padding-bottom: clamp(3rem, 8vw, 6rem);
}
.blog-card {
  display: block; text-decoration: none;
  background: var(--cream-soft);
  border: 1px solid var(--cream-rule);
  border-radius: 10px; padding: 1.75rem;
  transition: border-color 0.2s, transform 0.2s;
  color: inherit;
}
.blog-card:hover { border-color: rgba(138, 21, 33, 0.35); transform: translateY(-2px); }
.blog-card-eye {
  font-family: var(--sans); font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--crimson); margin-bottom: 0.75rem;
}
.blog-card-title {
  font-family: var(--sans); font-size: 1.05rem; font-weight: 600;
  color: var(--carbon); line-height: 1.35; margin-bottom: 0.75rem;
}
.blog-card-deck {
  font-size: 0.875rem; line-height: 1.6;
  color: var(--carbon-soft); font-weight: 300; margin-bottom: 1.25rem;
}
.blog-card-meta { font-size: 0.75rem; color: var(--carbon-soft); font-weight: 400; }
@media (max-width: 640px) { .blog-card-grid { grid-template-columns: 1fr; } }