/* StrategicAIMarketing.com - Design System & Brand CSS */
:root {
  --primary-navy: #0B1B3D;
  --primary-navy-dark: #07122A;
  --accent-gold: #C59B27;
  --accent-gold-hover: #D4AF37;
  --bg-cream: #FAFAFA;
  --bg-section-fill: #F4F5F7;
  --text-dark: #1E293B;
  --text-muted: #475569;
  --text-light: #94A3B8;
  --border-light: #E2E8F0;
  --font-serif: 'Merriweather', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-width: 1140px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-cream);
  color: var(--text-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary-navy);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: var(--accent-gold);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & Navigation */
.site-header {
  background-color: var(--primary-navy);
  color: #FAFAFA;
  border-bottom: 2px solid var(--accent-gold);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
}

.brand-logo {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: #FAFAFA;
  letter-spacing: -0.5px;
}

.brand-logo span {
  color: var(--accent-gold);
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 28px;
  align-items: center;
}

.main-nav a {
  color: #E2E8F0;
  font-size: 15px;
  font-weight: 500;
}

.main-nav a:hover, .main-nav a.active {
  color: var(--accent-gold);
}

.nav-cta {
  background-color: var(--accent-gold);
  color: var(--primary-navy) !important;
  font-weight: 700 !important;
  padding: 8px 18px;
  border-radius: 4px;
}

.nav-cta:hover {
  background-color: var(--accent-gold-hover);
}

/* Hero Section */
.hero-section {
  background-color: var(--primary-navy);
  color: #FAFAFA;
  padding: 90px 0 80px 0;
  text-align: center;
}

.eyebrow {
  color: var(--accent-gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 44px;
  line-height: 1.25;
  font-weight: 700;
  margin-bottom: 20px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subhead {
  font-size: 19px;
  line-height: 1.6;
  color: #E2E8F0;
  max-width: 780px;
  margin: 0 auto 36px auto;
}

.btn-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  background-color: var(--accent-gold);
  color: var(--primary-navy);
  padding: 14px 32px;
  font-weight: 700;
  border-radius: 4px;
  font-size: 16px;
  display: inline-block;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background-color: var(--accent-gold-hover);
  color: var(--primary-navy);
}

.btn-secondary {
  border: 1.5px solid #E2E8F0;
  color: #FAFAFA;
  padding: 14px 30px;
  font-weight: 600;
  border-radius: 4px;
  font-size: 16px;
  display: inline-block;
}

.btn-secondary:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

.btn-secondary-dark {
  border: 1.5px solid var(--primary-navy);
  color: var(--primary-navy);
  padding: 14px 30px;
  font-weight: 600;
  border-radius: 4px;
  font-size: 16px;
  display: inline-block;
}

.btn-secondary-dark:hover {
  border-color: var(--accent-gold);
  background-color: var(--primary-navy);
  color: var(--accent-gold);
}

/* Authority Bar */
.authority-bar {
  background-color: var(--bg-section-fill);
  border-bottom: 1px solid var(--border-light);
  padding: 24px 0;
}

.authority-grid {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 20px;
  text-align: center;
}

.authority-item strong {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--primary-navy);
  display: block;
}

.authority-item span {
  font-size: 13px;
  color: var(--text-muted);
}

/* Section Headings */
.section-title {
  font-family: var(--font-serif);
  font-size: 32px;
  color: var(--primary-navy);
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-desc {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 720px;
  margin-bottom: 32px;
}

/* Card Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}

.card {
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 28px;
  background-color: #FFFFFF;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card-tag {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-gold);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--primary-navy);
  margin: 12px 0;
  line-height: 1.35;
}

.card-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.card-meta {
  font-size: 13px;
  color: var(--text-light);
  font-weight: 600;
}

/* Featured Book Section */
.featured-book-section {
  padding: 80px 0;
  background-color: #FFFFFF;
}

.book-flex {
  display: flex;
  align-items: center;
  gap: 60px;
  flex-wrap: wrap;
}

.book-cover {
  background-color: var(--primary-navy);
  color: var(--accent-gold);
  padding: 50px 36px;
  border-radius: 8px;
  box-shadow: 0 15px 35px rgba(0,0,0,0.12);
  border-left: 10px solid var(--accent-gold);
  max-width: 320px;
  text-align: center;
}

.book-cover h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  color: #FAFAFA;
  margin: 15px 0 10px 0;
  line-height: 1.2;
}

/* Newsletter Section */
.newsletter-section {
  background-color: var(--primary-navy);
  color: #FAFAFA;
  padding: 80px 0;
  text-align: center;
}

.newsletter-form {
  display: flex;
  gap: 12px;
  max-width: 580px;
  margin: 28px auto 0 auto;
  flex-wrap: wrap;
}

.newsletter-form input {
  padding: 14px 16px;
  border-radius: 4px;
  border: 1px solid #334155;
  font-size: 15px;
  outline: none;
}

.newsletter-form input[type="text"] {
  flex: 1;
  min-width: 140px;
}

.newsletter-form input[type="email"] {
  flex: 1.5;
  min-width: 200px;
}

/* Article Detail Pages & Editorial Layout */
.article-header-section {
  background-color: var(--primary-navy);
  color: #FAFAFA;
  padding: 70px 0 60px 0;
  border-bottom: 1px solid #1E293B;
}

.breadcrumbs {
  font-size: 13px;
  color: var(--accent-gold);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.breadcrumbs a {
  color: #E2E8F0;
}

.breadcrumbs a:hover {
  color: var(--accent-gold);
}

.article-headline {
  font-family: var(--font-serif);
  font-size: 42px;
  line-height: 1.22;
  color: #FAFAFA;
  margin-bottom: 20px;
  max-width: 900px;
}

.article-deck {
  font-size: 20px;
  line-height: 1.6;
  color: #CBD5E1;
  max-width: 820px;
  margin-bottom: 30px;
  font-weight: 400;
}

.article-meta-bar {
  display: flex;
  gap: 24px;
  align-items: center;
  font-size: 14px;
  color: #94A3B8;
  border-top: 1px solid #1E293B;
  padding-top: 20px;
  flex-wrap: wrap;
}

.article-meta-bar span strong {
  color: #FAFAFA;
}

.article-container {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 50px;
  padding: 60px 0 90px 0;
  align-items: start;
}

.article-sidebar {
  position: sticky;
  top: 100px;
}

.toc-box {
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 24px;
}

.toc-box h4 {
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--primary-navy);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.toc-box ul {
  list-style: none;
  font-size: 13.5px;
  line-height: 1.5;
}

.toc-box li {
  margin-bottom: 10px;
}

.toc-box a {
  color: var(--text-muted);
  display: block;
}

.toc-box a:hover {
  color: var(--primary-navy);
  font-weight: 600;
}

.article-body {
  font-size: 18px;
  line-height: 1.8;
  color: #2D3748;
  max-width: 780px;
}

.article-body h2 {
  font-family: var(--font-serif);
  font-size: 28px;
  color: var(--primary-navy);
  margin: 48px 0 20px 0;
  line-height: 1.3;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--bg-section-fill);
}

.article-body h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--primary-navy);
  margin: 36px 0 16px 0;
  line-height: 1.35;
}

.article-body p {
  margin-bottom: 24px;
}

.article-body ul, .article-body ol {
  margin: 0 0 28px 24px;
}

.article-body li {
  margin-bottom: 10px;
}

.article-body blockquote {
  border-left: 4px solid var(--accent-gold);
  background-color: var(--bg-section-fill);
  padding: 24px 28px;
  margin: 32px 0;
  font-family: var(--font-serif);
  font-size: 19px;
  font-style: italic;
  color: var(--primary-navy);
  line-height: 1.6;
}

.framework-box {
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  border-left: 5px solid var(--primary-navy);
  padding: 28px;
  margin: 36px 0;
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.03);
}

.framework-box h4 {
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--primary-navy);
  margin-bottom: 12px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
  font-size: 15px;
}

.data-table th, .data-table td {
  padding: 14px 18px;
  border: 1px solid var(--border-light);
  text-align: left;
}

.data-table th {
  background-color: var(--primary-navy);
  color: #FAFAFA;
  font-family: var(--font-serif);
  font-size: 14px;
}

.data-table tr:nth-child(even) {
  background-color: var(--bg-section-fill);
}

.author-bio-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 32px;
  margin-top: 60px;
  display: flex;
  gap: 24px;
  align-items: center;
}

.author-bio-card h4 {
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--primary-navy);
  margin-bottom: 8px;
}

.author-bio-card p {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* Footer */
.site-footer {
  background-color: var(--primary-navy-dark);
  color: #94A3B8;
  padding: 60px 0 30px 0;
  border-top: 1px solid #1E293B;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-family: var(--font-serif);
  color: #FAFAFA;
  font-size: 16px;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: #94A3B8;
}

.footer-col a:hover {
  color: var(--accent-gold);
}

.footer-bottom {
  border-top: 1px solid #1E293B;
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: #64748B;
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .article-container {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 32px;
  }
  .hero-subhead {
    font-size: 16px;
  }
  .header-inner {
    flex-direction: column;
    gap: 16px;
  }
  .main-nav ul {
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
  }
  .book-flex {
    flex-direction: column;
    text-align: center;
  }
  .book-cover {
    margin: 0 auto;
  }
  .article-headline {
    font-size: 30px;
  }
  .article-deck {
    font-size: 17px;
  }
}

/* Intake consent row (contact + newsletter forms) */
.sam-consent { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; line-height: 1.5; text-align: left; flex-basis: 100%; }
.sam-consent input { margin-top: 3px; flex: none; }
.newsletter-form { flex-wrap: wrap; position: relative; }