/* ============================================================
   article.css — Shared styles for all Cerenium Insights articles
   ============================================================ */

/* ── Article Hero ── */
.article-hero {
  background: var(--navy);
  padding: 6rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(184,150,62,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.article-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.article-back-link {
  display: inline-block;
  color: var(--gold-light);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  letter-spacing: 0.03em;
  margin-bottom: 1.5rem;
  transition: color 0.2s ease;
}

.article-back-link:hover {
  color: #fff;
}

.article-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.15;
  margin: 0.75rem 0 1.25rem;
}

.article-subtitle {
  font-family: var(--font-body);
  font-size: 1.125rem;
  color: #C4C7CC;
  line-height: 1.65;
  max-width: 680px;
  margin: 0 0 1.75rem;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gold-light);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.meta-divider {
  color: var(--gold);
  font-size: 0.6rem;
}

/* ── Article Body Layout ── */
.article-body-section {
  background: #fff;
  padding: 5rem 0 6rem;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 4rem;
  align-items: start;
  max-width: 1140px;
  margin: 0 auto;
}

/* ── Article Content ── */
.article-content {
  max-width: 720px;
}

.article-lead {
  font-family: var(--font-body);
  font-size: 1.2rem;
  line-height: 1.75;
  color: var(--navy);
  font-weight: 400;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--gold-pale);
}

.article-content p {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.8;
  color: #2D3748;
  margin-bottom: 1.5rem;
}

.article-content h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--navy);
  margin: 3rem 0 1.25rem;
  line-height: 1.25;
}

.article-content h3 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--navy);
  margin: 2.5rem 0 1rem;
}

.article-content a {
  color: var(--gold-text);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

.article-content a:hover {
  color: var(--navy);
}

/* ── Article CTA Block ── */
.article-cta-block {
  background: var(--off-white);
  border-left: 4px solid var(--gold);
  padding: 2.5rem;
  margin-top: 4rem;
  border-radius: 0 8px 8px 0;
}

.article-cta-block .gold-rule {
  display: none;
}

.article-cta-block h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 0.75rem;
}

.article-cta-block p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: #4A5568;
  margin-bottom: 1.5rem;
}

.article-cta-block .btn-primary {
  color: var(--navy);
  background: var(--gold);
}

.article-cta-block .btn-primary:hover {
  background: var(--gold-light);
  color: var(--navy);
}

/* ── Sidebar ── */
.article-sidebar {
  position: sticky;
  top: 108px;
}

.sidebar-block {
  background: var(--off-white);
  border-top: 3px solid var(--gold);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
}

.sidebar-block h3 {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--navy);
  margin: 0 0 1rem;
}

.sidebar-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.sidebar-links li {
  border-bottom: 1px solid #E2E8F0;
  padding-bottom: 0.875rem;
}

.sidebar-links li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sidebar-links a {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--navy);
  text-decoration: none;
  line-height: 1.45;
  transition: color 0.2s ease;
  display: block;
}

.sidebar-links a:hover {
  color: var(--gold-text);
}

/* ── Responsive ── */
@media (max-width: 960px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .article-sidebar {
    position: static;
  }

  .article-content {
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  .article-hero {
    padding: 5rem 0 3rem;
  }

  .article-hero h1 {
    font-size: 1.75rem;
  }

  .article-body-section {
    padding: 3rem 0 4rem;
  }

  .article-cta-block {
    padding: 1.75rem;
  }
}