/* ============================================================
   CTO on Demand — blog.css
   Article typography and blog-specific layout
   ============================================================ */

/* ── Article page layout ── */
.article-hero {
  background:
    radial-gradient(ellipse 60% 50% at 100% 0%, rgba(23,86,232,.1) 0%, transparent 55%),
    linear-gradient(160deg, #EBF0FC 0%, #FFFFFF 50%);
  padding-block: clamp(3rem, 6vw, 5rem) clamp(2rem, 4vw, 3.5rem);
  border-bottom: 1px solid var(--clr-border);
}

.article-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.625rem 1rem;
  margin-bottom: 1.5rem;
}

.article-category {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.28em 0.75em;
  background: rgba(23,86,232,.08);
  border: 1px solid rgba(23,86,232,.18);
  border-radius: 99px;
  font-size: 0.6875rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-accent);
  text-decoration: none;
  transition: background var(--ease), border-color var(--ease);
}

.article-category:hover {
  background: rgba(23,86,232,.14);
  border-color: rgba(23,86,232,.3);
}

.article-date,
.article-read-time {
  font-size: 0.8125rem;
  color: var(--clr-muted);
}

.article-date::before,
.article-read-time::before {
  content: '·';
  margin-right: 0.75rem;
  color: var(--clr-border);
}

.article-hero h1 {
  font-size: clamp(1.875rem, 4vw, 3rem);
  max-width: 18ch;
  line-height: 1.12;
  margin-bottom: 1.25rem;
  hyphens: none;
}

.article-standfirst {
  font-size: 1.125rem;
  color: var(--clr-muted);
  line-height: 1.65;
  max-width: 58ch;
  margin-bottom: 2rem;
}

.article-author-row {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.article-author-avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--clr-dark);
  color: #fff;
  font-size: 0.75rem;
  font-weight: var(--fw-bold);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  letter-spacing: 0.02em;
}

.article-author-meta strong {
  display: block;
  font-size: 0.875rem;
  font-weight: var(--fw-semibold);
  color: var(--clr-dark);
}

.article-author-meta span {
  font-size: 0.8125rem;
  color: var(--clr-muted);
}

/* ── Article body layout ── */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 4rem;
  align-items: start;
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

/* ── Article prose ── */
.article-body {
  min-width: 0;
}

.article-body h2 {
  font-size: clamp(1.375rem, 2.5vw, 1.75rem);
  margin-top: 2.75rem;
  margin-bottom: 0.875rem;
}

.article-body h3 {
  font-size: 1.125rem;
  margin-top: 2rem;
  margin-bottom: 0.625rem;
}

.article-body p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--clr-body);
  margin-bottom: 1.25rem;
  max-width: 70ch;
}

.article-body ul,
.article-body ol {
  margin-bottom: 1.25rem;
  padding-left: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.article-body ul li,
.article-body ol li {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--clr-body);
  padding-left: 1.5rem;
  position: relative;
  max-width: 68ch;
}

.article-body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-accent);
}

.article-body ol {
  counter-reset: ol-counter;
}

.article-body ol li {
  counter-increment: ol-counter;
}

.article-body ol li::before {
  content: counter(ol-counter);
  position: absolute;
  left: 0;
  top: 0;
  font-size: 0.75rem;
  font-weight: var(--fw-bold);
  color: var(--clr-accent);
  min-width: 1.25rem;
}

.article-body blockquote {
  margin: 2rem 0;
  padding: 1.5rem 2rem;
  border-left: 3px solid var(--clr-accent);
  background: var(--clr-accent-bg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.article-body blockquote p {
  font-size: 1.0625rem;
  font-style: italic;
  color: var(--clr-dark);
  margin-bottom: 0;
  max-width: none;
}

.article-body strong { color: var(--clr-dark); }

.article-body a {
  color: var(--clr-accent);
  text-decoration: underline;
  text-decoration-color: rgba(23,86,232,.3);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--ease);
}

.article-body a:hover {
  text-decoration-color: var(--clr-accent);
}

/* Key callout boxes */
.article-callout {
  background: var(--clr-dark);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  margin: 2.5rem 0;
}

.article-callout p {
  color: rgba(255,255,255,.82);
  margin-bottom: 0;
  max-width: none;
}

.article-callout strong { color: #fff; }

/* Article divider */
.article-divider {
  border: none;
  border-top: 1px solid var(--clr-border);
  margin: 3rem 0;
}

/* ── Sidebar ── */
.article-sidebar {
  position: sticky;
  top: 5.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sidebar-card {
  background: var(--clr-section-alt);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--clr-border);
}

.sidebar-card h4 {
  font-size: 0.8125rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--clr-muted);
  margin-bottom: 1rem;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.toc-list a {
  font-size: 0.875rem;
  color: var(--clr-muted);
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-sm);
  display: block;
  transition: color var(--ease), background var(--ease);
  line-height: 1.4;
}

.toc-list a:hover {
  color: var(--clr-accent);
  background: var(--clr-accent-bg);
}

.sidebar-cta {
  background: var(--clr-dark);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.sidebar-cta p {
  font-size: 0.875rem;
  color: rgba(255,255,255,.65);
  margin-bottom: 1rem;
  max-width: none;
}

.sidebar-cta strong {
  display: block;
  color: #fff;
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.sidebar-cta .btn {
  width: 100%;
  text-align: center;
  justify-content: center;
  font-size: 0.875rem;
  padding: 0.625em 1.25em;
  margin-top: 0.25rem;
}

/* ── Blog breadcrumb nav ── */
.blog-breadcrumb {
  padding-block: 0.875rem;
  border-bottom: 1px solid var(--clr-border);
  background: #fff;
}

.blog-breadcrumb nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--clr-muted);
}

.blog-breadcrumb a {
  color: var(--clr-muted);
  transition: color var(--ease);
}

.blog-breadcrumb a:hover {
  color: var(--clr-accent);
}

.blog-breadcrumb .sep {
  color: var(--clr-border);
}

.blog-breadcrumb .current {
  color: var(--clr-body);
  font-weight: var(--fw-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 30ch;
}

/* ── Toc active state (JS-driven) ── */
.toc-list a.toc-active {
  color: var(--clr-accent);
  background: var(--clr-accent-bg);
}

/* ── Article share row ── */
.article-share {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--clr-border);
}

.article-share span {
  font-size: 0.8125rem;
  font-weight: var(--fw-semibold);
  color: var(--clr-muted);
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4em 0.875em;
  border-radius: 99px;
  border: 1px solid var(--clr-border);
  font-size: 0.8125rem;
  font-weight: var(--fw-medium);
  color: var(--clr-body);
  background: transparent;
  cursor: pointer;
  transition: border-color var(--ease), background var(--ease), color var(--ease);
  text-decoration: none;
}

.share-btn:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: var(--clr-accent-bg);
}

/* ── Blog index section headings ── */
.blog-index-section {
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.blog-index-section > .container > .section-header {
  margin-bottom: 2rem;
}

/* ── Article footer / related posts ── */
.article-footer-section {
  background: var(--clr-section-alt);
  padding-block: clamp(3rem, 5vw, 4.5rem);
  border-top: 1px solid var(--clr-border);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.related-card {
  background: var(--clr-bg);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--ease), transform var(--ease);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-decoration: none;
}

.related-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.related-card-category {
  font-size: 0.6875rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-accent);
}

.related-card h3 {
  font-size: 0.9375rem;
  font-weight: var(--fw-semibold);
  color: var(--clr-dark);
  line-height: 1.4;
}

.related-card p {
  font-size: 0.875rem;
  color: var(--clr-muted);
  line-height: 1.6;
  flex: 1;
  max-width: none;
}

.related-card-arrow {
  font-size: 0.8125rem;
  color: var(--clr-accent);
  font-weight: var(--fw-semibold);
}

/* ── Blog index ── */
.blog-hero {
  background:
    radial-gradient(ellipse 60% 50% at 100% 0%, rgba(23,86,232,.1) 0%, transparent 55%),
    linear-gradient(160deg, #EBF0FC 0%, #FFFFFF 50%);
  padding-block: clamp(3rem, 6vw, 5rem) clamp(2rem, 4vw, 3rem);
  border-bottom: 1px solid var(--clr-border);
}

.blog-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  margin-bottom: 0.875rem;
}

.blog-hero p {
  font-size: 1.0625rem;
  color: var(--clr-muted);
  max-width: 52ch;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

/* Featured post — spans 2 cols */
.blog-card-featured {
  grid-column: span 2;
}

.blog-card {
  background: var(--clr-bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  transition: box-shadow var(--ease), transform var(--ease);
  text-decoration: none;
}

.blog-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.blog-card-category {
  font-size: 0.6875rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-accent);
}

.blog-card h2 {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: var(--fw-bold);
  color: var(--clr-dark);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.blog-card-featured h2 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

.blog-card p {
  font-size: 0.9rem;
  color: var(--clr-muted);
  line-height: 1.65;
  flex: 1;
  max-width: none;
}

.blog-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--clr-border);
}

.blog-card-date {
  font-size: 0.8125rem;
  color: var(--clr-muted);
}

.blog-card-read-time {
  font-size: 0.8125rem;
  color: var(--clr-accent);
  font-weight: var(--fw-medium);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .article-sidebar {
    position: static;
  }

  .related-grid {
    grid-template-columns: 1fr 1fr;
  }

  .blog-grid {
    grid-template-columns: 1fr 1fr;
  }

  .blog-card-featured {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .article-hero h1 { max-width: none; }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .blog-grid {
    grid-template-columns: 1fr;
  }

  .blog-card-featured {
    grid-column: span 1;
  }
}