/* ============================================================
   BOOK ADVERTISING PAGE — Premium Industry Landing Page
   ============================================================ */

.book-ad-page {
  --primary: #0071e3;
  --primary-hover: #0077ed;
  --text-dark: #1d1d1f;
  --text-mid: #424245;
  --text-light: #86868b;
  --bg-white: #ffffff;
  --bg-light: #f5f5f7;
  --bg-warm: #fafafa;
  --border: #d2d2d7;
  --green: #34c759;
  --red: #ff3b30;
  --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.06);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-pill: 980px;
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display',
               'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.book-hero {
  padding: 120px 0 20px;
  text-align: center;
}

.book-hero-content {
  max-width: 820px;
  margin: 0 auto;
}

/* ============================================================
   PRESS AUTHORITY QUOTE
   ============================================================ */
.book-press-quote {
  padding: 36px 0 0;
  background: var(--bg-white);
}

.press-quote-card {
  max-width: 540px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
}

.press-stars {
  display: flex;
  gap: 6px;
}

.press-blockquote {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-dark);
  line-height: 1.5;
  letter-spacing: -0.01em;
  margin: 0;
  padding: 0 20px;
}

.press-source {
  display: flex;
  align-items: center;
  justify-content: center;
}

.press-logo {
  height: 48px;
  width: auto;
  object-fit: contain;
  transition: opacity 0.2s ease;
}

.press-date {
  font-size: 0.85rem;
  color: var(--text-light);
  letter-spacing: 0.02em;
}

.press-read-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--primary);
  text-decoration: none;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(0, 113, 227, 0.06);
  transition: background 0.2s ease, color 0.2s ease;
}

.press-read-link:hover {
  background: rgba(0, 113, 227, 0.12);
  color: var(--primary-hover);
  text-decoration: none;
}

/* ============================================================
   SOCIAL PROOF BAR
   ============================================================ */
.book-social-proof {
  padding: 40px 0;
  background: var(--bg-white);
  border-top: 1px solid #eee;
  border-bottom: 1px solid #eee;
}

.proof-items {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

.proof-item {
  text-align: center;
}

.proof-number {
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: -0.02em;
}

.proof-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 2px;
}

.proof-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* ============================================================
   AEO SECTION
   ============================================================ */
.book-aeo-section {
  padding: 60px 0;
  background: var(--bg-white);
}

.aeo-box {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px;
  text-align: center;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
}

.aeo-question {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.aeo-answer {
  font-size: 1.05rem;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ============================================================
   VALUE PROPOSITION GRID
   ============================================================ */
.book-value-section {
  padding: 80px 0;
  background: var(--bg-light);
}

.book-value-section h2,
.book-how-section h2,
.book-audience-section h2,
.book-compare-section h2,
.book-platforms-section h2,
.book-usecases-section h2,
.book-faq-section h2 {
  text-align: center;
  font-size: 2.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-dark);
  margin-bottom: 1rem;
}

.section-sub {
  text-align: center;
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 3rem;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.value-card {
  background: var(--bg-white);
  padding: 32px 28px;
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.value-icon {
  width: 56px;
  height: 56px;
  background: var(--bg-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}

.value-icon i {
  font-size: 1.5rem;
  color: var(--primary);
}

.value-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.value-card p {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.55;
  margin-bottom: 0;
}

/* ============================================================
   HOW IT WORKS
   ============================================================ */
.book-how-section {
  padding: 80px 0;
  background: var(--bg-white);
}

.book-how-section h2 {
  margin-bottom: 3rem;
}

.steps-grid {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 16px;
  max-width: 1000px;
  margin: 0 auto;
}

.step-card {
  flex: 1;
  background: var(--bg-light);
  padding: 36px 28px;
  border-radius: var(--radius-md);
  text-align: center;
  max-width: 300px;
}

.step-number {
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 auto 1.25rem;
}

.step-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 0.75rem;
}

.step-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.55;
  margin-bottom: 0;
}

.step-arrow {
  display: flex;
  align-items: center;
  padding-top: 60px;
  color: var(--border);
  font-size: 1.5rem;
}

/* ============================================================
   AUDIENCE SECTION
   ============================================================ */
.book-audience-section {
  padding: 80px 0;
  background: var(--bg-light);
}

.book-audience-section h2 {
  margin-bottom: 3rem;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.audience-card {
  background: var(--bg-white);
  padding: 32px 24px;
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.audience-icon {
  width: 56px;
  height: 56px;
  background: var(--bg-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}

.audience-icon i {
  font-size: 1.5rem;
  color: var(--primary);
}

.audience-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 0.75rem;
}

.audience-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.55;
  margin-bottom: 0;
}

/* ============================================================
   COMPARISON TABLE
   ============================================================ */
.book-compare-section {
  padding: 80px 0;
  background: var(--bg-white);
}

.book-compare-section h2 {
  margin-bottom: 3rem;
}

.compare-table {
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid #eee;
}

.compare-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
}

.compare-row.compare-header {
  background: var(--bg-light);
}

.compare-cell {
  padding: 16px 20px;
  font-size: 0.95rem;
  color: var(--text-mid);
  border-bottom: 1px solid #f0f0f0;
  display: flex;
  align-items: center;
}

.compare-header .compare-cell {
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-light);
}

.compare-cell.label {
  font-weight: 600;
  color: var(--text-dark);
}

.compare-cell.old {
  color: var(--text-light);
}

.compare-cell.new {
  color: var(--primary);
  font-weight: 600;
}

.compare-row:last-child .compare-cell {
  border-bottom: none;
}

/* ============================================================
   PLATFORMS
   ============================================================ */
.book-platforms-section {
  padding: 60px 0;
  background: var(--bg-light);
}

.book-platforms-section h2 {
  margin-bottom: 0.5rem;
}

.platforms-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  max-width: 800px;
  margin: 0 auto;
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  background: var(--bg-white);
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-dark);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease;
}

.platform-badge:hover {
  transform: translateY(-2px);
}

.platform-badge i {
  font-size: 1.2rem;
  color: var(--primary);
}

/* ============================================================
   USE CASES
   ============================================================ */
.book-usecases-section {
  padding: 80px 0;
  background: var(--bg-white);
}

.book-usecases-section h2 {
  margin-bottom: 3rem;
}

.usecases-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.usecase-card {
  background: var(--bg-light);
  padding: 28px;
  border-radius: var(--radius-md);
}

.usecase-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.usecase-card .challenge-label,
.usecase-card .solution-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.usecase-card .challenge-label {
  color: var(--red);
}

.usecase-card .solution-label {
  color: var(--green);
}

.usecase-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.55;
  margin-bottom: 0.75rem;
}

/* ============================================================
   FAQ
   ============================================================ */
.book-faq-section {
  padding: 80px 0;
  background: var(--bg-light);
}

.book-faq-section h2 {
  margin-bottom: 3rem;
}

.book-faq-section .faq-list {
  max-width: 750px;
  margin: 0 auto;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.book-faq-section .faq-item {
  border-bottom: 1px solid var(--border);
}

.book-faq-section .faq-item:last-child {
  border-bottom: none;
}

.book-faq-section .faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 28px;
  background: transparent;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  transition: color 0.2s ease;
}

.book-faq-section .faq-question:hover {
  color: var(--primary);
}

.book-faq-section .faq-question i {
  transition: transform 0.2s ease;
  color: var(--text-light);
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-left: 16px;
}

.book-faq-section .faq-item.active .faq-question i {
  transform: rotate(180deg);
}

.book-faq-section .faq-answer {
  padding: 0 28px 22px;
  display: none;
}

.book-faq-section .faq-item.active .faq-answer {
  display: block;
}

.book-faq-section .faq-answer p {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ============================================================
   CROSS LINKS
   ============================================================ */
.book-crosslinks-section {
  padding: 60px 0;
  background: var(--bg-white);
}

.book-crosslinks-section h3 {
  text-align: center;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 1.5rem;
}

.book-crosslinks-section .cross-links {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.book-crosslinks-section .cross-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 20px;
  background: var(--bg-light);
  color: var(--primary);
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
}

.book-crosslinks-section .cross-links a:hover {
  background: var(--primary);
  color: #fff;
}

/* ============================================================
   FINAL CTA
   ============================================================ */
.book-final-cta {
  padding: 80px 0;
  background: linear-gradient(180deg, #f5f5f7 0%, #e8e8ed 100%);
  text-align: center;
}

.book-final-cta h2 {
  font-size: 2.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-dark);
  margin-bottom: 0.75rem;
}

.book-final-cta > .container > p {
  font-size: 1.15rem;
  color: var(--text-light);
  margin-bottom: 2rem;
}

/* Pricing Section Title */
.book-pricing-title {
  text-align: center;
  font-size: 2.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.book-pricing-section .section-sub {
  margin-bottom: 1.5rem;
}

.book-pricing-section .billing-toggle {
  margin-bottom: 2rem;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .book-ad-page .home-heading.heading.text-center {
    font-size: 52px !important;
    line-height: 1.15 !important;
    letter-spacing: 0.5px !important;
  }

  .value-grid,
  .audience-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .usecases-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps-grid {
    flex-wrap: wrap;
  }

  .step-arrow {
    display: none;
  }

  .step-card {
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .book-ad-page .home-heading.heading.text-center {
    font-size: 44px !important;
    line-height: 1.15 !important;
    letter-spacing: 0.3px !important;
    padding: 0 10px;
  }

  .book-ad-page .hero-black-text.subTxt {
    font-size: 14px !important;
    line-height: 1.4 !important;
    padding: 0 10px;
  }

  .book-ad-page .hero-black-text.subTxt br {
    display: none;
  }

  .book-hero {
    padding: 100px 0 10px;
  }

  .book-hero-content {
    max-width: 100%;
    padding: 0 15px;
  }

  .value-grid,
  .audience-grid,
  .usecases-grid {
    grid-template-columns: 1fr;
  }

  .proof-items {
    gap: 24px;
  }

  .proof-divider {
    display: none;
  }

  .compare-row {
    grid-template-columns: 1fr;
  }

  .compare-header {
    display: none;
  }

  .compare-cell {
    padding: 12px 20px;
  }

  .compare-cell.label {
    background: var(--bg-light);
    font-size: 0.85rem;
  }

  .compare-cell.old::before {
    content: "Old way: ";
    font-weight: 600;
    color: var(--text-light);
  }

  .compare-cell.new::before {
    content: "AdGPT: ";
    font-weight: 600;
  }

  .book-value-section,
  .book-how-section,
  .book-audience-section,
  .book-compare-section,
  .book-usecases-section,
  .book-faq-section {
    padding: 50px 0;
  }

  .book-value-section h2,
  .book-how-section h2,
  .book-audience-section h2,
  .book-compare-section h2,
  .book-platforms-section h2,
  .book-usecases-section h2,
  .book-faq-section h2 {
    font-size: 1.75rem;
  }

  .aeo-box {
    padding: 24px;
  }

  .aeo-question {
    font-size: 1.2rem;
  }

  .book-final-cta {
    padding: 50px 0;
  }

  .book-final-cta h2 {
    font-size: 1.75rem;
  }

  .book-faq-section .faq-question {
    padding: 18px 20px;
    font-size: 0.95rem;
  }

  .book-faq-section .faq-answer {
    padding: 0 20px 18px;
  }

  .book-crosslinks-section .cross-links {
    gap: 10px;
  }

  .book-crosslinks-section .cross-links a {
    padding: 10px 16px;
    font-size: 0.85rem;
  }

  .book-press-quote {
    padding: 28px 0 0;
  }

  .press-quote-card {
    gap: 10px;
    padding: 28px 24px;
  }

  .press-stars svg {
    width: 26px;
    height: 26px;
  }

  .press-blockquote {
    font-size: 1.05rem;
    padding: 0;
  }

  .press-logo {
    height: 40px;
  }

  .press-date {
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .book-hero {
    padding: 110px 0 10px;
  }

  .book-ad-page .home-heading.heading.text-center {
    font-size: 32px !important;
    line-height: 1.2 !important;
    letter-spacing: 0 !important;
    padding: 0 10px;
  }

  .book-ad-page .hero-black-text.subTxt {
    font-size: 13px !important;
    line-height: 1.35 !important;
  }

  .proof-items {
    flex-direction: column;
    gap: 16px;
  }

  .platforms-grid {
    gap: 10px;
  }

  .platform-badge {
    padding: 10px 18px;
    font-size: 0.85rem;
  }

  .book-value-section h2,
  .book-how-section h2,
  .book-audience-section h2,
  .book-compare-section h2,
  .book-platforms-section h2,
  .book-usecases-section h2,
  .book-faq-section h2 {
    font-size: 1.5rem;
  }

  .book-final-cta h2 {
    font-size: 1.5rem;
  }

  .section-sub {
    font-size: 0.95rem;
  }

  .step-card {
    padding: 24px 20px;
  }

  .usecase-card {
    padding: 20px;
  }

  .audience-card {
    padding: 24px 20px;
  }

  .value-card {
    padding: 24px 20px;
  }

  .book-press-quote {
    padding: 20px 0 0;
  }

  .press-quote-card {
    gap: 8px;
    padding: 24px 18px;
    margin: 0 10px;
  }

  .press-stars svg {
    width: 22px;
    height: 22px;
  }

  .press-stars {
    gap: 4px;
  }

  .press-blockquote {
    font-size: 0.92rem;
    line-height: 1.45;
  }

  .press-logo {
    height: 34px;
  }

  .press-date {
    font-size: 0.75rem;
  }

  .press-read-link {
    font-size: 0.8rem;
    padding: 5px 14px;
  }
}