/* ========================================
   INSIGHTS — Shared Stylesheet
   Mirrors main site: Dark theme, Google Material Design
   Lightweight: no animations from main styles.css
   ======================================== */

:root {
  --bg-primary: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 100%);
  --bg-secondary: #1e1e1e;
  --bg-elevated: #2c2c2c;
  --bg-hover: #252525;
  --google-blue: #4285f4;
  --google-blue-hover: #5a95f5;
  --google-blue-light: rgba(66, 133, 244, 0.12);
  --google-green: #34a853;
  --google-yellow: #fbbc04;
  --google-red: #ea4335;
  --text-primary: #e8eaed;
  --text-secondary: #9aa0a6;
  --text-disabled: #5f6368;
  --border-subtle: #3c4043;
  --border-emphasis: rgba(66, 133, 244, 0.3);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.5);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 15px;
}

body::before {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  background: radial-gradient(circle at 20% 80%, rgba(70,70,80,0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* ===== NAVIGATION ===== */
.navbar {
  position: fixed;
  top: 0; width: 100%;
  background: rgba(18,18,18,0.92);
  backdrop-filter: blur(10px);
  padding: 1.25rem 2rem;
  z-index: 100;
  border-bottom: 1px solid var(--border-subtle);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
}
.nav-logo {
  font-family: 'Roboto Mono', monospace;
  font-weight: 700;
  font-size: 1rem;
  color: var(--google-blue);
  text-decoration: none;
  letter-spacing: 0.05em;
}
.nav-links { display: flex; gap: 2rem; }
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  transition: color 0.2s var(--ease);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--google-blue);
  transition: width 0.2s var(--ease);
}
.nav-links a:hover,
.nav-links a.active { color: var(--google-blue); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

/* ===== INDEX PAGE ===== */

.page-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 7.5rem 2rem 2.5rem;
}
.page-header-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}
.section-number {
  font-family: 'Roboto Mono', monospace;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--google-blue);
  letter-spacing: 0.05em;
}
.page-header h1 {
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--text-primary);
}
.page-header-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 660px;
  line-height: 1.75;
}
.page-header-desc strong { color: var(--text-primary); }

/* Filter bar */
.filter-bar {
  max-width: 1200px;
  margin: 0 auto 2rem;
  padding: 0 2rem;
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  align-items: center;
}
.filter-label {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-disabled);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.filter-tag {
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  font-family: inherit;
}
.filter-tag:hover,
.filter-tag.active {
  border-color: var(--google-blue);
  color: var(--google-blue);
  background: var(--google-blue-light);
}

/* Articles container */
.articles-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 5rem;
}

/* Featured card */
.article-featured {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  margin-bottom: 2rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.article-featured:hover {
  border-color: var(--border-emphasis);
  box-shadow: var(--shadow-lg);
}
.badge-featured {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--google-blue);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.badge-featured::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--google-blue);
}
.article-featured h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
  margin-bottom: 0.75rem;
}
.article-featured .summary {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
  max-width: 580px;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.article-date {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-disabled);
}
.article-tags { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.article-read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--google-blue);
  font-weight: 600;
  margin-top: 1rem;
  transition: gap 0.2s var(--ease);
}
.article-featured:hover .article-read-more { gap: 0.7rem; }
.article-featured-number {
  font-family: 'Roboto Mono', monospace;
  font-size: 3.5rem;
  font-weight: 700;
  color: rgba(66,133,244,0.07);
  line-height: 1;
  user-select: none;
}

/* Section divider */
.section-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.section-divider-label {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-disabled);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  white-space: nowrap;
}
.section-divider-line {
  flex: 1;
  height: 1px;
  background: var(--border-subtle);
}

/* Article grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.1rem;
}
.article-card {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.article-card:hover {
  border-color: var(--border-emphasis);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
.article-card-issue {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.68rem;
  color: var(--text-disabled);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.article-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.45;
  flex: 1;
}
.card-excerpt {
  font-size: 0.845rem;
  color: var(--text-secondary);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
  margin-top: auto;
}
.card-read {
  font-size: 0.78rem;
  color: var(--google-blue);
  font-weight: 600;
}

/* Tags */
.tag {
  padding: 0.18rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.tag-geo      { background: rgba(66,133,244,0.15);  color: #7baaf7; }
.tag-paid     { background: rgba(52,168,83,0.15);   color: #57bb6e; }
.tag-b2b      { background: rgba(251,188,4,0.15);   color: #fdd663; }
.tag-fmcg     { background: rgba(234,67,53,0.15);   color: #f28b82; }
.tag-strategy { background: rgba(160,120,220,0.15); color: #c58ef5; }
.tag-analytics{ background: rgba(0,188,212,0.15);   color: #4dd0e1; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-disabled);
  font-size: 0.9rem;
}

/* ===== ARTICLE PAGE ===== */

.article-wrapper {
  max-width: 760px;
  margin: 0 auto;
  padding: 7rem 2rem 5rem;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.775rem;
  color: var(--text-disabled);
  margin-bottom: 2rem;
  font-family: 'Roboto Mono', monospace;
}
.breadcrumb a {
  color: var(--google-blue);
  text-decoration: none;
}
.breadcrumb a:hover { color: var(--google-blue-hover); }

/* Article header */
.article-issue {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--google-blue);
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.article-issue::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--google-blue);
}
.article-header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.32;
  margin-bottom: 1.25rem;
}

/* Direct Answer block — highest GEO priority zone */
.answer-summary {
  background: var(--google-blue-light);
  border: 1px solid var(--border-emphasis);
  border-left: 4px solid var(--google-blue);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.2rem 1.5rem;
  margin-bottom: 1.75rem;
}
.answer-summary-label {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--google-blue);
  margin-bottom: 0.5rem;
}
.answer-summary p {
  font-size: 0.975rem;
  color: var(--text-primary);
  line-height: 1.7;
  font-weight: 500;
}

/* Article meta */
.article-meta-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 2.25rem;
  flex-wrap: wrap;
}
.meta-author { font-size: 0.845rem; color: var(--text-secondary); }
.meta-author strong { color: var(--text-primary); }
.meta-date {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-disabled);
}

/* Article body */
.article-body {
  font-size: 0.975rem;
  color: var(--text-secondary);
  line-height: 1.8;
}
.article-body h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 2.25rem 0 0.9rem;
}
.article-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 1.75rem 0 0.65rem;
}
.article-body p { margin-bottom: 1.15rem; }
.article-body strong { color: var(--text-primary); font-weight: 600; }
.article-body a { color: var(--google-blue); text-decoration: none; }
.article-body a:hover { text-decoration: underline; }
.article-body ul, .article-body ol {
  margin: 0.5rem 0 1rem 1.25rem;
}
.article-body li {
  margin-bottom: 0.4rem;
  line-height: 1.7;
}
.article-body code {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.85em;
  background: var(--bg-elevated);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: var(--text-primary);
}

/* Signal block — market data */
.signal-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.5rem;
  margin: 1.75rem 0;
}
.signal-block-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}
.signal-label {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.18rem 0.55rem;
  border-radius: var(--radius-full);
}
.signal-label.data     { background: rgba(52,168,83,0.15);  color: #57bb6e; }
.signal-label.synthesis{ background: rgba(66,133,244,0.15); color: #7baaf7; }
.signal-label.inference{ background: rgba(251,188,4,0.15);  color: #fdd663; }
.signal-label.signal   { background: rgba(234,67,53,0.15);  color: #f28b82; }
.signal-source { font-size: 0.76rem; color: var(--text-disabled); }
.signal-block p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.72;
  margin: 0;
}

/* Field observation block — client case */
.field-block {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.5rem;
  margin: 1.75rem 0;
}
.field-block-label {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--google-yellow);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.field-block-label::before { content: '📊'; font-size: 0.8rem; }
.field-block p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.72;
  margin-bottom: 0.7rem;
}
.field-block p:last-child { margin-bottom: 0; }

/* Q&A section — core GEO zone */
.qa-section { margin: 2.25rem 0; }
.qa-section-header {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-disabled);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.qa-section-header::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-subtle);
}

.qa-item {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 0.85rem;
  overflow: hidden;
}
.qa-question {
  padding: 1rem 1.35rem;
  background: var(--bg-secondary);
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  user-select: none;
  transition: background 0.2s var(--ease);
}
.qa-question:hover { background: var(--bg-hover); }
.qa-q-marker {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--google-blue);
  background: var(--google-blue-light);
  width: 22px; height: 22px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 0.1rem;
}
.qa-question-text {
  font-size: 0.945rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
  flex: 1;
}
.qa-toggle {
  font-size: 1rem;
  color: var(--text-disabled);
  transition: transform 0.25s var(--ease);
  flex-shrink: 0;
  line-height: 1.5;
}
.qa-item.open .qa-toggle {
  transform: rotate(45deg);
  color: var(--google-blue);
}

/* CRITICAL: answer is always in DOM — only visibility toggled */
.qa-answer {
  padding: 0 1.35rem 1.1rem 3.25rem;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  display: none;
}
.qa-item.open .qa-answer { display: block; }

.qa-a-marker {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--google-green);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0.9rem 0 0.45rem;
}
.qa-answer p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 0.7rem;
}
.qa-answer p:last-child { margin-bottom: 0; }
.qa-answer strong { color: var(--text-primary); }
.qa-answer ul {
  margin: 0.4rem 0 0.7rem 1rem;
}
.qa-answer li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0.35rem;
}

/* Actionable list */
.action-list { list-style: none; margin: 1rem 0; }
.action-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
}
.action-list li:last-child { border-bottom: none; }
.action-num {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--google-blue);
  background: var(--google-blue-light);
  width: 22px; height: 22px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 0.1rem;
}
.action-list li strong { color: var(--text-primary); }

/* Author bio — E-E-A-T signals */
.author-bio {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  margin-top: 2.75rem;
  display: flex;
  gap: 1.35rem;
  align-items: flex-start;
}
.author-avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--google-blue-light);
  border: 2px solid var(--border-emphasis);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Roboto Mono', monospace;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--google-blue);
  flex-shrink: 0;
}
.author-bio-content h4 {
  font-size: 0.925rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}
.author-bio-content p {
  font-size: 0.825rem;
  color: var(--text-secondary);
  line-height: 1.65;
}
.author-bio-content a {
  color: var(--google-blue);
  text-decoration: none;
}

/* Article nav */
.article-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 2.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: 0.75rem;
}
.article-nav a {
  color: var(--google-blue);
  text-decoration: none;
  font-size: 0.845rem;
  font-weight: 500;
  transition: color 0.2s var(--ease);
}
.article-nav a:hover { color: var(--google-blue-hover); }

/* Footer */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 1.5rem 2rem;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.footer-inner p { font-size: 0.775rem; color: var(--text-disabled); }
.footer-back {
  font-size: 0.775rem;
  color: var(--google-blue);
  text-decoration: none;
  font-weight: 500;
}
.footer-back:hover { color: var(--google-blue-hover); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .page-header h1 { font-size: 1.9rem; }
  .article-featured { grid-template-columns: 1fr; }
  .article-featured-number { display: none; }
  .articles-grid { grid-template-columns: 1fr; }
  .article-header h1 { font-size: 1.55rem; }
  .author-bio { flex-direction: column; }
  .article-nav { flex-direction: column; align-items: flex-start; }
  .nav-links { gap: 1.25rem; }
}


/* ============================================
   ARTICLE PAGE STYLES — PATCH
   Append to end of insights-styles.css
   ============================================ */

/* Article page body */
body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', 'Roboto', sans-serif;
  line-height: 1.7;
}

main {
  max-width: 780px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* ── Article Header ── */
.article-header {
  margin-bottom: 2.5rem;
}

.issue-label {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--google-blue);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.85rem;
}

.article-header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 1.25rem;
}

/* ── Direct Answer Block ── */
.direct-answer {
  background: var(--google-blue-light);
  border-left: 3px solid var(--google-blue);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.35rem;
  margin-bottom: 1.5rem;
}

.direct-answer p {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.75;
  margin: 0;
}

/* ── Article Meta Row ── */
.article-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.article-meta time {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-disabled);
}

.article-meta .tags {
  color: var(--text-disabled);
  font-size: 0.75rem;
}

/* ── Section Base ── */
.body-signal,
.body-field-observation,
.body-mechanism,
.qa-block,
.actionable,
.author-bio {
  margin-bottom: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.body-signal h2,
.body-field-observation h2,
.body-mechanism h2,
.qa-block h2,
.actionable h2,
.author-bio h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.1rem;
}

.body-signal p,
.body-field-observation p,
.body-mechanism p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.body-signal p:last-child,
.body-field-observation p:last-child,
.body-mechanism p:last-child {
  margin-bottom: 0;
}

.body-signal strong,
.body-field-observation strong,
.body-mechanism strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ── Q&A Block (static — GEO: answers always in DOM) ── */
.qa-block h2 {
  margin-bottom: 1.35rem;
}

.qa-item {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
}

.qa-item h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
  padding: 1rem 1.35rem;
  background: var(--bg-secondary);
  margin: 0;
  border-bottom: 1px solid var(--border-subtle);
}

.qa-answer {
  padding: 1rem 1.35rem;
  background: var(--bg-elevated);
  display: block; /* always visible — GEO requirement */
}

.qa-answer p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 0.7rem;
}

.qa-answer p:last-child {
  margin-bottom: 0;
}

.qa-answer strong {
  color: var(--text-primary);
}

/* ── Actionable Section ── */
.actionable ol {
  padding-left: 1.35rem;
  counter-reset: none;
}

.actionable li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1rem;
  padding-left: 0.35rem;
}

.actionable li strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: 0.25rem;
}

/* ── Author Bio ── */
.author-bio {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--border-subtle);
  border-bottom: none;
  margin-bottom: 2rem;
}

.author-bio h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-disabled);
  margin-bottom: 0.75rem;
}

.author-bio p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin: 0;
}

.author-bio a {
  color: var(--google-blue);
  text-decoration: none;
  font-weight: 600;
}

.author-bio a:hover {
  color: var(--google-blue-hover);
}

/* ── Article Nav ── */
.article-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1.5rem;
}

.article-nav a {
  font-size: 0.85rem;
  color: var(--google-blue);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s;
}

.article-nav a:hover {
  color: var(--google-blue-hover);
}

/* ── Signal Label Badges ── */
.body-signal p,
.body-field-observation p,
.body-mechanism p,
.qa-answer p {
  /* [DATA] [SYNTHESIS] [INFERENCE] [SIGNAL] labels render inline naturally */
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .article-header h1 { font-size: 1.5rem; }
  main { padding: 1.25rem 1rem 3rem; }
  .article-nav { flex-direction: column; align-items: flex-start; }
  .author-bio { padding: 1.1rem; }
}