/* ==============================================================================
   PROEX GUIDE — BRAND V2 KNOWLEDGE & EDITORIAL ENGINE STYLES
   Colors: Navy #102A46, Deep Navy #0B1F34, Champagne Gold #C4A16B, Cream #F8F7F4, Canvas #F8F9FB
   Typography: Playfair Display (Headlines), Be Vietnam Pro (Body), JetBrains Mono (Numbers & Code)
   ============================================================================== */

:root {
  --guide-navy: #102A46;
  --guide-navy-deep: #0B1F34;
  --guide-gold: #C4A16B;
  --guide-gold-dark: #94713A;
  --guide-gold-light: rgba(196, 161, 107, 0.12);
  --guide-canvas: #F8F9FB;
  --guide-surface: #FFFFFF;
  --guide-cream: #F8F7F4;
  --guide-border: #E8EDF2;
  --guide-border-subtle: #E2E8F0;
  --guide-ink-primary: #0F172A;
  --guide-ink-secondary: #334155;
  --guide-ink-muted: #64748B;
  --guide-teal: #0D9488;
  --guide-amber: #B45309;
  --guide-red: #B91C1C;
  --guide-shadow-sm: 0 1px 3px rgba(16, 42, 70, 0.04);
  --guide-shadow-md: 0 4px 14px rgba(16, 42, 70, 0.06);
  --guide-shadow-lg: 0 10px 30px rgba(16, 42, 70, 0.08);
  --guide-radius-sm: 4px;
  --guide-radius-md: 8px;
  --guide-radius-lg: 12px;
}

/* ==========================================
   GLOBAL LAYOUT & CONTAINER
   ========================================== */
.proex-guide-page {
  background-color: var(--guide-canvas);
  color: var(--guide-ink-primary);
  font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, sans-serif;
  min-height: 100vh;
}

.guide-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ==========================================
   HERO SEARCH SECTION
   ========================================== */
.guide-hero {
  background: linear-gradient(180deg, #F8F7F4 0%, #F1EFEA 100%);
  border-bottom: 1px solid var(--guide-border);
  padding: 48px 0 40px;
  position: relative;
  overflow: hidden;
}

.guide-hero::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: radial-gradient(rgba(196, 161, 107, 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.guide-hero-content {
  position: relative;
  z-index: 2;
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}

.guide-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  background: var(--guide-surface);
  border: 1px solid rgba(196, 161, 107, 0.35);
  border-radius: 999px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  color: var(--guide-gold-dark);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
  box-shadow: var(--guide-shadow-sm);
}

.guide-hero-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 38px;
  line-height: 1.25;
  color: var(--guide-navy);
  font-weight: 700;
  margin-bottom: 14px;
}

.guide-hero-sub {
  font-size: 16px;
  line-height: 1.6;
  color: var(--guide-ink-secondary);
  margin-bottom: 28px;
}

.guide-search-form {
  display: flex;
  background: var(--guide-surface);
  border: 1.5px solid var(--guide-navy);
  border-radius: var(--guide-radius-sm);
  padding: 4px;
  box-shadow: 0 4px 20px rgba(16, 42, 70, 0.08);
  margin-bottom: 20px;
}

.guide-search-input {
  flex: 1;
  border: none;
  outline: none;
  padding: 14px 18px;
  font-size: 15.5px;
  color: var(--guide-ink-primary);
  background: transparent;
}

.guide-search-input::placeholder {
  color: #94A3B8;
}

.guide-search-btn {
  background: var(--guide-navy);
  color: #FFFFFF;
  border: none;
  border-radius: var(--guide-radius-sm);
  padding: 0 28px;
  font-size: 14.5px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.guide-search-btn:hover {
  background: var(--guide-navy-deep);
  box-shadow: 0 2px 8px rgba(16, 42, 70, 0.25);
}

.guide-quick-chips {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 12.5px;
}

.guide-quick-chips-label {
  color: var(--guide-ink-muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
}

.guide-quick-chip {
  background: var(--guide-surface);
  border: 1px solid var(--guide-border);
  border-radius: 999px;
  padding: 4px 12px;
  color: var(--guide-ink-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s ease;
}

.guide-quick-chip:hover {
  border-color: var(--guide-gold);
  color: var(--guide-navy);
  background: #FAF8F5;
}

/* ==========================================
   FORMAT TABS STRIP
   ========================================== */
.guide-format-strip {
  background: var(--guide-surface);
  border-bottom: 1px solid var(--guide-border);
  padding: 8px 0;
  position: sticky;
  top: 72px;
  z-index: 90;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
}

.guide-format-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  white-space: nowrap;
  padding: 4px 0;
  scrollbar-width: none;
}

.guide-format-nav::-webkit-scrollbar {
  display: none;
}

.guide-format-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: var(--guide-radius-sm);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--guide-ink-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.guide-format-tab:hover {
  background: #FAF8F5;
  color: var(--guide-navy);
  border-color: var(--guide-border);
}

.guide-format-tab.active {
  background: var(--guide-navy);
  color: #FFFFFF;
  border-color: var(--guide-navy);
}

.guide-format-tab.active i {
  color: var(--guide-gold);
}

/* ==========================================
   KNOWLEDGE DOMAINS GRID (01 - 06)
   ========================================== */
.guide-section {
  padding: 48px 0;
}

.guide-section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 12px;
}

.guide-section-title-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.guide-section-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  color: var(--guide-gold-dark);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.guide-section-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 26px;
  font-weight: 700;
  color: var(--guide-navy);
}

.guide-domains-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.guide-domain-card {
  background: var(--guide-surface);
  border: 1px solid var(--guide-border);
  border-radius: var(--guide-radius-md);
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--guide-shadow-sm);
}

.guide-domain-card:hover {
  border-color: rgba(196, 161, 107, 0.45);
  transform: translateY(-2px);
  box-shadow: var(--guide-shadow-md);
}

.guide-domain-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.guide-domain-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: #FAF8F5;
  border: 1px solid rgba(196, 161, 107, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--guide-navy);
  font-size: 18px;
}

.guide-domain-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 700;
  color: var(--guide-gold-dark);
}

.guide-domain-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 19px;
  font-weight: 700;
  color: var(--guide-navy);
  margin-bottom: 8px;
}

.guide-domain-desc {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--guide-ink-secondary);
  margin-bottom: 16px;
  flex-grow: 1;
}

.guide-domain-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 1px solid var(--guide-border);
  font-size: 12.5px;
  color: var(--guide-gold-dark);
  font-weight: 700;
}

/* ==========================================
   ARTICLE CARDS & GRID
   ========================================== */
.guide-featured-row {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 24px;
  margin-bottom: 40px;
}

.guide-card-featured {
  background: var(--guide-surface);
  border: 1px solid var(--guide-border);
  border-radius: var(--guide-radius-md);
  overflow: hidden;
  box-shadow: var(--guide-shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
}

.guide-card-featured:hover {
  border-color: rgba(196, 161, 107, 0.45);
  box-shadow: var(--guide-shadow-md);
}

.guide-card-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #0F172A;
}

.guide-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.guide-card-featured:hover .guide-card-img {
  transform: scale(1.02);
}

.guide-card-badge-format {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(16, 42, 70, 0.92);
  color: #FFFFFF;
  padding: 4px 10px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.6px;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(196, 161, 107, 0.35);
}

.guide-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.guide-card-meta-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  color: var(--guide-gold-dark);
  font-weight: 700;
}

.guide-card-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 22px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--guide-navy);
  margin-bottom: 12px;
  text-decoration: none;
}

.guide-card-title:hover {
  color: var(--guide-gold-dark);
}

.guide-card-excerpt {
  font-size: 14px;
  line-height: 1.6;
  color: var(--guide-ink-secondary);
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.guide-card-meta-foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--guide-border);
  font-size: 12px;
  color: var(--guide-ink-muted);
}

/* Secondary compact stack */
.guide-compact-stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.guide-card-compact {
  background: var(--guide-surface);
  border: 1px solid var(--guide-border);
  border-radius: var(--guide-radius-md);
  padding: 16px;
  display: flex;
  gap: 16px;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

.guide-card-compact:hover {
  border-color: rgba(196, 161, 107, 0.45);
  box-shadow: var(--guide-shadow-sm);
}

.guide-compact-thumb {
  width: 120px;
  height: 80px;
  border-radius: 6px;
  overflow: hidden;
  flex-shrink: 0;
  background: #0F172A;
}

.guide-compact-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.guide-compact-info {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex: 1;
}

.guide-compact-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 15px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--guide-navy);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ==========================================
   ARTICLE DETAIL VIEW ENGINE (SCREEN 03)
   ========================================== */
.article-detail-wrap {
  padding: 36px 0 60px;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--guide-ink-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.article-breadcrumb a {
  color: var(--guide-ink-secondary);
  text-decoration: none;
}

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

.article-layout-grid {
  display: grid;
  grid-template-columns: 240px minmax(0, 740px) 280px;
  gap: 32px;
  align-items: start;
}

/* Left TOC */
.article-toc-sticky {
  position: sticky;
  top: 100px;
  background: var(--guide-surface);
  border: 1px solid var(--guide-border);
  border-radius: var(--guide-radius-md);
  padding: 18px 20px;
  box-shadow: var(--guide-shadow-sm);
}

.article-toc-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--guide-gold-dark);
  letter-spacing: 0.8px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-toc-link {
  font-size: 13px;
  line-height: 1.45;
  color: var(--guide-ink-secondary);
  text-decoration: none;
  display: block;
  padding-left: 10px;
  border-left: 2px solid transparent;
  transition: all 0.2s ease;
}

.article-toc-link:hover,
.article-toc-link.active {
  color: var(--guide-navy);
  border-left-color: var(--guide-gold);
  font-weight: 600;
}

/* Center Main Reading Column */
.article-reading-column {
  background: var(--guide-surface);
  border: 1px solid var(--guide-border);
  border-radius: var(--guide-radius-md);
  padding: 40px 48px;
  box-shadow: var(--guide-shadow-sm);
}

.article-badge-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.article-h1 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 34px;
  line-height: 1.3;
  color: var(--guide-navy);
  font-weight: 800;
  margin-bottom: 20px;
}

.article-byline-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: #FAF8F5;
  border-radius: var(--guide-radius-sm);
  border: 1px solid rgba(196, 161, 107, 0.25);
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 12px;
}

.article-byline-person {
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-author-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--guide-navy);
  color: var(--guide-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}

.article-byline-info {
  display: flex;
  flex-direction: column;
}

.article-byline-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--guide-navy);
}

.article-byline-role {
  font-size: 11px;
  color: var(--guide-ink-muted);
}

.article-dates-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--guide-ink-muted);
}

/* Direct Answer Box (Thế Giới Di Động & Search Engine Optimization model) */
.prx-direct-answer {
  background: var(--guide-cream);
  border-left: 4px solid var(--guide-gold);
  border-radius: 0 var(--guide-radius-sm) var(--guide-radius-sm) 0;
  padding: 22px 24px;
  margin-bottom: 32px;
}

.prx-direct-answer-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 800;
  color: var(--guide-gold-dark);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.prx-direct-answer-text {
  font-size: 16px;
  line-height: 1.65;
  color: var(--guide-navy-deep);
  font-weight: 500;
}

/* Hero Article Image */
.article-hero-media {
  border-radius: var(--guide-radius-sm);
  overflow: hidden;
  margin-bottom: 32px;
  background: #0F172A;
}

.article-hero-media img {
  width: 100%;
  display: block;
}

.article-hero-caption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--guide-ink-muted);
  font-style: italic;
  text-align: center;
  background: #F8F9FB;
  border-top: 1px solid var(--guide-border);
}

/* Rich Content Typography */
.proex-guide-rendered-body {
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--guide-ink-secondary);
}

.proex-guide-rendered-body h2 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 24px;
  color: var(--guide-navy);
  font-weight: 700;
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--guide-border);
}

.proex-guide-rendered-body h3 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 20px;
  color: var(--guide-navy);
  font-weight: 700;
  margin: 24px 0 12px;
}

.proex-guide-rendered-body p {
  margin-bottom: 20px;
}

/* Numbered Steps Sequence */
.prx-step-sequence {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin: 28px 0;
}

.prx-step-row {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 18px 22px;
  background: #FAF8F5;
  border: 1px solid rgba(196, 161, 107, 0.25);
  border-radius: var(--guide-radius-sm);
}

.prx-step-circle {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--guide-gold);
  color: var(--guide-navy);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 800;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(196, 161, 107, 0.35);
}

.prx-step-content h4 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 17px;
  font-weight: 700;
  color: var(--guide-navy);
  margin-bottom: 6px;
}

.prx-step-content p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--guide-ink-secondary);
  margin-bottom: 0;
}

/* Formula Block */
.prx-formula-block {
  background: #FAF8F5;
  border: 1px solid rgba(196, 161, 107, 0.35);
  border-radius: var(--guide-radius-sm);
  padding: 20px 24px;
  margin: 24px 0;
}

.prx-formula-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 800;
  color: var(--guide-gold-dark);
  letter-spacing: 0.8px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.prx-formula-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--guide-navy);
  background: #FFFFFF;
  padding: 14px 18px;
  border-radius: 4px;
  border: 1px solid var(--guide-border);
  white-space: pre-wrap;
  font-weight: 600;
}

/* Comparison & Amortization Table */
.prx-sample-banner {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--guide-ink-secondary);
  margin-bottom: 12px;
}

.prx-sample-tag {
  background: rgba(196, 161, 107, 0.15);
  color: var(--guide-gold-dark);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid rgba(196, 161, 107, 0.35);
}

.prx-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--guide-border);
  border-radius: var(--guide-radius-sm);
  margin-bottom: 28px;
}

.prx-data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

.prx-data-table th {
  background: var(--guide-navy);
  color: #FFFFFF;
  font-weight: 600;
  text-align: left;
  padding: 12px 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  letter-spacing: 0.5px;
}

.prx-data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--guide-border);
  color: var(--guide-ink-primary);
  font-family: 'JetBrains Mono', monospace;
}

.prx-data-table tr:last-child td {
  border-bottom: none;
}

.prx-data-table tr:hover td {
  background: #FAF8F5;
}

/* Callout Boxes */
.prx-callout {
  border-radius: var(--guide-radius-sm);
  padding: 18px 22px;
  margin: 24px 0;
  border-left: 4px solid transparent;
}

.prx-callout-title {
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.prx-callout-tip {
  background: rgba(13, 148, 136, 0.08);
  border-left-color: var(--guide-teal);
  color: #064E3B;
}

.prx-callout-warning {
  background: #FFFBEB;
  border-left-color: #F59E0B;
  color: #78350F;
}

.prx-callout-danger {
  background: #FEF2F2;
  border-left-color: var(--guide-red);
  color: #7F1D1D;
}

/* Checklists */
.prx-checklist {
  list-style: none;
  padding: 0;
  margin: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.prx-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--guide-ink-primary);
}

.prx-checklist li i {
  color: var(--guide-teal);
  font-size: 16px;
  margin-top: 3px;
}

/* Official References Box */
.prx-references-box {
  background: #FAF8F5;
  border: 1px solid var(--guide-border);
  border-radius: var(--guide-radius-sm);
  padding: 22px 24px;
  margin: 36px 0;
}

.prx-references-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--guide-navy);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.prx-reference-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13.5px;
  margin-bottom: 8px;
}

.prx-reference-item a {
  color: var(--guide-navy);
  font-weight: 600;
  text-decoration: none;
}

.prx-reference-item a:hover {
  text-decoration: underline;
  color: var(--guide-gold-dark);
}

/* Reader Feedback Widget */
.prx-feedback-card {
  background: #FAF8F5;
  border: 1px solid rgba(196, 161, 107, 0.35);
  border-radius: var(--guide-radius-sm);
  padding: 24px;
  text-align: center;
  margin: 36px 0;
}

.prx-feedback-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--guide-navy);
  margin-bottom: 14px;
}

.prx-feedback-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
}

.prx-btn-feedback {
  background: #FFFFFF;
  border: 1px solid var(--guide-border);
  padding: 8px 24px;
  border-radius: var(--guide-radius-sm);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
  color: var(--guide-ink-primary);
}

.prx-btn-feedback:hover {
  border-color: var(--guide-navy);
  background: var(--guide-navy);
  color: #FFFFFF;
}

/* Right Sticky Rail (AI & Tools) */
.article-right-rail {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.prx-ai-panel {
  background: #FFFFFF;
  border: 1px solid rgba(16, 42, 70, 0.2);
  border-radius: var(--guide-radius-md);
  overflow: hidden;
  box-shadow: var(--guide-shadow-sm);
}

.prx-ai-panel-header {
  background: var(--guide-navy);
  color: #FFFFFF;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 16px;
  font-weight: 700;
}

.prx-ai-panel-header i {
  color: var(--guide-gold);
}

.prx-ai-panel-body {
  padding: 16px;
}

.prx-ai-input-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.prx-ai-input {
  width: 100%;
  border: 1px solid var(--guide-border);
  border-radius: 4px;
  padding: 10px 12px;
  font-size: 13.5px;
  resize: vertical;
  min-height: 70px;
  outline: none;
}

.prx-ai-input:focus {
  border-color: var(--guide-navy);
}

.prx-btn-ai-ask {
  background: var(--guide-gold);
  color: var(--guide-navy);
  border: none;
  border-radius: 4px;
  padding: 9px 14px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.prx-btn-ai-ask:hover {
  background: #B38E57;
}

.prx-ai-note {
  font-size: 11px;
  line-height: 1.45;
  color: var(--guide-ink-muted);
  font-style: italic;
  margin-top: 8px;
}

.prx-ai-response-box {
  background: #FAF8F5;
  border: 1px solid rgba(196, 161, 107, 0.3);
  border-radius: 4px;
  padding: 12px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--guide-navy-deep);
  margin-top: 10px;
  display: none;
}

/* Related Tools Widget */
.prx-tools-widget {
  background: #FFFFFF;
  border: 1px solid var(--guide-border);
  border-radius: var(--guide-radius-md);
  padding: 18px 20px;
  box-shadow: var(--guide-shadow-sm);
}

.prx-tools-widget-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 800;
  color: var(--guide-gold-dark);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.prx-tool-link-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--guide-border);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--guide-navy);
  text-decoration: none;
  transition: all 0.2s ease;
}

.prx-tool-link-row:last-child {
  border-bottom: none;
}

.prx-tool-link-row:hover {
  color: var(--guide-gold-dark);
  padding-left: 4px;
}

/* Consent Lead CTA Card */
.prx-cta-card {
  background: linear-gradient(135deg, var(--guide-navy) 0%, var(--guide-navy-deep) 100%);
  color: #FFFFFF;
  border-radius: var(--guide-radius-md);
  padding: 22px 20px;
  text-align: center;
  box-shadow: var(--guide-shadow-md);
}

.prx-cta-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 17px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.prx-cta-desc {
  font-size: 12.5px;
  line-height: 1.5;
  color: #CBD5E1;
  margin-bottom: 16px;
}

.prx-btn-cta-gold {
  display: block;
  background: var(--guide-gold);
  color: var(--guide-navy);
  border: none;
  border-radius: 4px;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s ease;
}

.prx-btn-cta-gold:hover {
  background: #B38E57;
}

/* ==========================================
   RESPONSIVE DESIGN (TABLET & MOBILE)
   ========================================== */
@media (max-width: 1024px) {
  .guide-domains-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .guide-featured-row {
    grid-template-columns: 1fr;
  }
  .article-layout-grid {
    grid-template-columns: 1fr;
  }
  .article-toc-sticky {
    position: static;
  }
  .article-right-rail {
    position: static;
  }
  .article-reading-column {
    padding: 28px 24px;
  }
}

@media (max-width: 640px) {
  .guide-hero {
    padding: 32px 0 24px;
  }
  .guide-hero-title {
    font-size: 26px;
  }
  .guide-hero-sub {
    font-size: 14px;
  }
  .guide-domains-grid {
    grid-template-columns: 1fr;
  }
  .article-reading-column {
    padding: 20px 16px;
  }
  .article-h1 {
    font-size: 24px;
  }
  .prx-step-row {
    flex-direction: column;
    gap: 10px;
  }
}