@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@500;600;700;800&family=Playfair+Display:ital,wght@0,500;0,600;1,500&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Default: Executive Editorial Light Mode */
  --bg-primary: #f6f8fc;
  --bg-secondary: #edf2f8;
  --bg-card: #ffffff;
  --bg-card-inner: #f1f5fa;
  --bg-card-inner-hover: #e8eef6;
  --text-primary: #0b192c;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --accent-primary: #8B6914;
  --accent-secondary: #6B5210;
  --accent-glow: rgba(139, 105, 20, 0.10);
  --accent-gradient: linear-gradient(135deg, #8B6914 0%, #B8962C 50%, #6B5210 100%);
  --border-color: rgba(139, 105, 20, 0.22);
  --border-light: rgba(11, 25, 44, 0.08);
  
  --font-heading: 'Cinzel', 'Playfair Display', serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  
  --transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease, background 0.25s ease;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-soft: 0 10px 30px -10px rgba(0, 0, 0, 0.08);
  --shadow-ink-ring: 0 0 0 2px rgba(139, 105, 20, 0.30), 0 0 20px rgba(139, 105, 20, 0.15);
}

[data-theme="dark"] {
  /* Dark Mode (Luxury Midnight Navy + Refined Antique Gold) */
  --bg-primary: #0b111e;
  --bg-secondary: #10192a;
  --bg-card: #152238;
  --bg-card-inner: #1b2a44;
  --bg-card-inner-hover: #223454;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #78889b;
  --accent-primary: #D4AF37;
  --accent-secondary: #AA822A;
  --accent-glow: rgba(212, 175, 55, 0.14);
  --accent-gradient: linear-gradient(135deg, #D4AF37 0%, #F5E6B3 50%, #AA822A 100%);
  --border-color: rgba(212, 175, 55, 0.24);
  --border-light: rgba(255, 255, 255, 0.08);
  --shadow-soft: 0 10px 30px -10px rgba(0, 0, 0, 0.45);
  --shadow-ink-ring: 0 0 0 2px rgba(212, 175, 55, 0.35), 0 0 22px rgba(212, 175, 55, 0.20);
}

@property --angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

@keyframes rotate-ring {
  to { --angle: 360deg; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(25px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulseGlow {
  0% { transform: scale(0.95); opacity: 0.7; }
  50% { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.7; }
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  width: 100%;
  max-width: 100%;
  touch-action: pan-y;
  -webkit-overflow-scrolling: touch;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.65;
  overflow-x: hidden;
  width: 100%;
  max-width: 100%;
  position: relative;
  touch-action: pan-y;
  transition: background-color 0.3s ease, color 0.3s ease;
}

main, section, header, footer, .container, .hero, .story-section {
  max-width: 100%;
  overflow-x: clip;
}

section[id] {
  scroll-margin-top: 100px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 6.5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2.4rem;
  margin-bottom: 0.75rem;
}

.section-title span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 620px;
  margin: 0 auto;
}

@keyframes bannerArrowFloat {
  0%, 100% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(5px);
  }
}

/* -------------------------------------------------------------
   Notification Bar (Top Banner)
------------------------------------------------------------- */
.notification-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 34px;
  background: var(--accent-gradient);
  color: #0a0e17;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.84rem;
  letter-spacing: 0.4px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1001;
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  transition: filter 0.2s ease, opacity 0.2s ease;
  cursor: pointer;
}

.notification-bar:hover {
  filter: brightness(1.08);
  color: #0a0e17;
  text-decoration: none;
}

.notification-bar span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.notification-bar i,
.notification-bar .banner-arrow {
  display: inline-block;
  animation: bannerArrowFloat 1.25s ease-in-out infinite;
  transition: transform 0.2s ease;
}

.notification-bar:hover i,
.notification-bar:hover .banner-arrow {
  animation-play-state: paused;
  transform: translateX(7px);
}

/* -------------------------------------------------------------
   Navbar
------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 34px;
  left: 0;
  width: 100%;
  max-width: 100%;
  z-index: 1000;
  background: rgba(248, 249, 252, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  transition: background 0.3s ease, top 0.3s ease;
  padding: 0.75rem 0;
  overflow: visible;
}

[data-theme="dark"] .navbar {
  background: rgba(10, 14, 23, 0.96);
}

.navbar .nav-container {
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  padding: 0 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  box-sizing: border-box;
}

.logo {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.5px;
  flex-shrink: 0;
  text-decoration: none;
}

.logo-prefix {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-primary);
}

.logo-suffix {
  font-family: var(--font-heading);
  font-weight: 800;
}

.logo-accent {
  color: var(--accent-primary);
}

.logo-deg {
  font-size: 0.85em;
  font-weight: 600;
  color: var(--text-secondary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.45rem, 0.9vw, 1.15rem);
  flex-shrink: 1;
}

.nav-item {
  font-size: clamp(0.78rem, 0.82vw, 0.85rem);
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: color 0.2s ease;
  padding: 0.2rem 0.25rem;
}

.nav-item:hover,
.nav-item.active {
  color: var(--accent-primary);
}

.nav-actions {
  display: flex;
  gap: 0.55rem;
  align-items: center;
  flex-shrink: 0;
  margin-left: auto;
  padding-right: 0.25rem;
}

.icon-btn {
  color: var(--text-primary);
  font-size: 1.05rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card-inner);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  flex-shrink: 0;
}

.icon-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* -------------------------------------------------------------
   Buttons
------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 700;
  transition: var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.82rem;
  height: 36px;
  box-sizing: border-box;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #0a0e17;
}

.btn-primary:hover {
  box-shadow: var(--shadow-ink-ring);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-ink-ring);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
}

.btn-outline:hover {
  background: var(--accent-glow);
  box-shadow: var(--shadow-ink-ring);
  transform: translateY(-2px);
}

/* -------------------------------------------------------------
   Hero Section
------------------------------------------------------------- */
.hero {
  padding-top: 8rem;
  padding-bottom: 4.5rem;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 4rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  background: var(--accent-glow);
  color: var(--accent-primary);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border-color);
}

.hero-title {
  font-size: 3.1rem;
  letter-spacing: -0.5px;
  margin-bottom: 1.5rem;
}

.hero-title span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 2.2rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.75rem;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.3rem 1.5rem;
  transition: var(--transition);
}

.metric-card h3 {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--accent-primary);
  margin-bottom: 0.25rem;
}

.metric-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.profile-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  border-top: 4px solid var(--accent-primary);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: var(--transition);
}

.profile-img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  object-position: top center;
}

.profile-meta {
  padding: 1.5rem;
  text-align: center;
}

.profile-name {
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
}

.profile-role {
  color: var(--accent-primary);
  font-size: 0.88rem;
  font-weight: 600;
}

/* -------------------------------------------------------------
   Story & Framework Section
------------------------------------------------------------- */
.story-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.story-card {
  background: var(--bg-card);
  padding: 3rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-soft);
}

.story-quote {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: 1.4rem;
  color: var(--text-primary);
  border-left: 4px solid var(--accent-primary);
  padding-left: 1.5rem;
  margin-bottom: 1.8rem;
  line-height: 1.5;
}

.story-body p {
  color: var(--text-secondary);
  font-size: 1.02rem;
  margin-bottom: 1.2rem;
  line-height: 1.7;
}

.framework-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
  margin-top: 2.5rem;
}

.framework-item {
  background: var(--bg-card-inner);
  padding: 2.2rem 2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.framework-title {
  font-family: var(--font-heading);
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

.framework-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* -------------------------------------------------------------
   Skills Matrix
------------------------------------------------------------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
}

.skill-card {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.skill-card-icon {
  width: 52px;
  height: 52px;
  background: var(--accent-glow);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  font-size: 1.4rem;
  margin-bottom: 1.25rem;
}

.skill-card-title {
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
}

.skill-card-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 1.25rem;
  flex: 1;
  line-height: 1.6;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  background: var(--bg-card-inner);
  color: var(--accent-primary);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
}

/* -------------------------------------------------------------
   Rotating Ink Edge Animation (Perimeter-Only Border Beam)
------------------------------------------------------------- */
.framework-item,
.skill-card,
.timeline-content,
.edu-card-item,
.pub-list-item,
.profile-card,
.metric-card,
.contact-card,
.newsletter-card {
  position: relative;
  z-index: 1;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

/* Spinning Conic Gradient Beam */
.framework-item::before,
.skill-card::before,
.timeline-content::before,
.edu-card-item::before,
.pub-list-item::before,
.profile-card::before,
.metric-card::before,
.contact-card::before,
.newsletter-card::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 250%;
  height: 250%;
  background: conic-gradient(from var(--angle), transparent 60%, var(--accent-primary) 80%, var(--accent-secondary) 95%, transparent 100%);
  transform: translate(-50%, -50%);
  z-index: -2;
  opacity: 0;
  transition: opacity 0.3s ease;
  animation: rotate-ring 3.5s linear infinite;
  pointer-events: none;
}

/* Inner Background Mask to Keep Effect Strictly at the 1.5px Edge */
.framework-item::after,
.skill-card::after,
.timeline-content::after,
.edu-card-item::after,
.pub-list-item::after,
.profile-card::after,
.metric-card::after,
.contact-card::after,
.newsletter-card::after {
  content: '';
  position: absolute;
  inset: 1.5px;
  background: var(--bg-card);
  border-radius: calc(var(--radius-md) - 1.5px);
  z-index: -1;
  pointer-events: none;
}

.framework-item::after {
  background: var(--bg-card-inner);
}

/* Ensure all interactive content remains fully clickable above the mask */
.framework-item > *,
.skill-card > *,
.timeline-content > *,
.edu-card-item > *,
.pub-list-item > *,
.profile-card > *,
.metric-card > *,
.contact-card > *,
.newsletter-card > * {
  position: relative;
  z-index: 1;
}

/* On Hover: Activate Edge Beam */
.framework-item:hover::before,
.skill-card:hover::before,
.timeline-content:hover::before,
.edu-card-item:hover::before,
.pub-list-item:hover::before,
.profile-card:hover::before,
.metric-card:hover::before,
.contact-card:hover::before,
.newsletter-card:hover::before {
  opacity: 1;
}

.framework-item:hover,
.skill-card:hover,
.timeline-content:hover,
.edu-card-item:hover,
.pub-list-item:hover,
.profile-card:hover,
.metric-card:hover,
.contact-card:hover,
.newsletter-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.5), 0 0 15px var(--accent-glow);
  border-color: transparent;
}

/* -------------------------------------------------------------
   Alternating Career Timeline
------------------------------------------------------------- */
.timeline {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--border-color);
  transform: translateX(-50%);
}

.timeline-item {
  width: 50%;
  position: relative;
  margin-bottom: 3.5rem;
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.timeline-item:nth-child(odd) {
  left: 0;
  margin-left: 0;
  margin-right: auto;
  padding-right: 3.5rem;
  padding-left: 0;
  text-align: left;
}

.timeline-item:nth-child(even) {
  left: 50%;
  margin-left: 0;
  margin-right: 0;
  padding-left: 3.5rem;
  padding-right: 0;
  text-align: left;
}

.timeline-dot {
  position: absolute;
  top: 24px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: 4px solid var(--bg-card);
  box-shadow: 0 0 12px var(--accent-primary);
  z-index: 10;
}

.timeline-item:nth-child(odd) .timeline-dot {
  right: -9px;
  left: auto;
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -9px;
  right: auto;
}

.timeline-content {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-soft);
}

.timeline-content:hover {
  border-color: transparent;
  box-shadow: var(--shadow-ink-ring);
  transform: translateY(-3px);
}

.timeline-date {
  display: inline-block;
  color: var(--accent-primary);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

.timeline-role {
  font-size: 1.2rem;
  margin-bottom: 0.35rem;
}

.timeline-org {
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.9rem;
}

.timeline-bullets {
  list-style-type: disc;
  padding-left: 1.25rem;
  margin-top: 0.6rem;
  text-align: left;
}

.timeline-bullets li {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 0.4rem;
  line-height: 1.5;
}

/* -------------------------------------------------------------
   Education & Publications
------------------------------------------------------------- */
.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
}

.subtitle {
  font-size: 1.4rem;
  margin-bottom: 1.8rem;
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.edu-card-item {
  background: var(--bg-card);
  padding: 1.6rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  margin-bottom: 1.4rem;
  transition: var(--transition);
}

.edu-degree {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.edu-school {
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 600;
}

.affiliations-list {
  list-style: disc;
  padding-left: 1.25rem;
  margin-top: 0.6rem;
}

.affiliations-list li {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 0.35rem;
}

.pub-list-item {
  background: var(--bg-card);
  padding: 1.5rem 1.6rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  border-left: 3px solid var(--accent-primary);
  margin-bottom: 1.2rem;
  transition: var(--transition);
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.pub-badge-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.45rem;
}

.pub-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent-primary);
  background: var(--accent-glow);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.pub-year {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 600;
}

.pub-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  line-height: 1.45;
  color: var(--text-primary);
  transition: color 0.2s ease;
}

.pub-link-icon {
  font-size: 0.76rem;
  margin-left: 5px;
  opacity: 0.7;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.pub-list-item:hover .pub-title {
  color: var(--accent-primary);
}

.pub-list-item:hover .pub-link-icon {
  transform: translate(2px, -2px);
  opacity: 1;
  color: var(--accent-primary);
}

.pub-meta {
  color: var(--text-muted);
  font-size: 0.84rem;
  font-weight: 500;
  line-height: 1.4;
}

/* -------------------------------------------------------------
   Published Books & Thought Architecture Blueprints
------------------------------------------------------------- */
.books-grid {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  margin-top: 2rem;
}

.book-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.2rem 2.5rem;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.book-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.8rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-light);
}

.book-edition-badge {
  font-size: 0.76rem;
  font-weight: 700;
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  background: rgba(201, 168, 76, 0.08);
  color: var(--accent-primary);
  border: 1px solid var(--border-color);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  box-shadow: inset 0 0 12px rgba(201, 168, 76, 0.05);
}

.book-edition-badge.leadership-badge {
  background: rgba(201, 168, 76, 0.06);
  color: var(--accent-primary);
  border-color: var(--border-color);
  box-shadow: inset 0 0 12px rgba(201, 168, 76, 0.05);
}

[data-theme="light"] .book-edition-badge.leadership-badge {
  background: rgba(139, 105, 20, 0.08);
  color: #8B6914;
  border-color: rgba(139, 105, 20, 0.3);
}

.book-format-tag {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.book-body-content {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 2.5rem;
  align-items: start;
}

.book-spine-mockup {
  background: linear-gradient(145deg, #1b2434 0%, #0d131e 100%);
  border-radius: var(--radius-sm);
  padding: 1.8rem 1.4rem;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-left: 6px solid var(--accent-primary);
  box-shadow: 0 15px 35px -10px rgba(0, 0, 0, 0.6), inset 0 0 20px rgba(201, 168, 76, 0.1);
  position: relative;
  transition: transform 0.3s ease;
}

[data-theme="light"] .book-spine-mockup {
  background: linear-gradient(145deg, #2a3447 0%, #151d2a 100%);
  color: #ffffff;
}

.book-spine-mockup.workbook-theme {
  border-left-color: #10b981;
}

.book-card:hover .book-spine-mockup {
  transform: translateY(-4px) rotate(-1deg);
}

.book-mockup-tag {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-primary);
  font-weight: 800;
}

.book-spine-mockup.workbook-theme .book-mockup-tag {
  color: #34d399;
}

.book-mockup-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.3;
  margin: 0.8rem 0 0.5rem 0;
  letter-spacing: 0.5px;
}

.book-mockup-subtitle {
  font-size: 0.78rem;
  color: #cbd5e1;
  line-height: 1.4;
}

.book-mockup-author {
  font-size: 0.75rem;
  color: var(--accent-primary);
  font-weight: 700;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 0.8rem;
  margin-top: 1rem;
}

.book-spine-mockup.workbook-theme .book-mockup-author {
  color: #34d399;
}

.book-title {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.35;
  margin-bottom: 0.4rem;
}

.book-author-meta {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.book-author-meta strong {
  color: var(--accent-primary);
}

.book-synopsis {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.4rem;
}

.book-key-takeaways {
  background: var(--bg-card-inner);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.4rem;
  margin-bottom: 1.5rem;
}

.takeaways-heading {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.takeaways-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.takeaways-list li {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 0.45rem;
  position: relative;
  padding-left: 1.2rem;
}

.takeaways-list li::before {
  content: "•";
  color: var(--accent-primary);
  font-weight: bold;
  position: absolute;
  left: 0;
  font-size: 1.1rem;
}

.book-cta-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.book-guarantee-note {
  font-size: 0.82rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
}

/* Edge Rotating Beam on Book Card */
.book-card::before {
  content: '';
  position: absolute;
  inset: -50%;
  background: conic-gradient(from var(--angle), transparent 70%, var(--accent-primary) 100%);
  animation: rotate-ring 4s linear infinite;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
  pointer-events: none;
}

.book-card::after {
  content: '';
  position: absolute;
  inset: 1.5px;
  background: var(--bg-card);
  border-radius: calc(var(--radius-lg) - 1.5px);
  z-index: 0;
  pointer-events: none;
}

.book-card > * {
  position: relative;
  z-index: 1;
}

.book-card:hover::before {
  opacity: 1;
}

.book-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.5), 0 0 15px var(--accent-glow);
  border-color: transparent;
}

@media (max-width: 860px) {
  .book-body-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .book-spine-mockup {
    min-height: auto;
    padding: 1.4rem;
  }
  .book-card {
    padding: 1.5rem;
  }
}

/* -------------------------------------------------------------
   Executive Newsletter & Thought Leadership Hub
------------------------------------------------------------- */
.newsletter-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 3.5rem;
}

.newsletter-card {
  background: var(--bg-card);
  padding: 2.2rem 2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-soft);
}

.newsletter-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.newsletter-badge {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--accent-glow);
  color: var(--accent-primary);
  border: 1px solid var(--border-color);
}

.newsletter-date {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

.newsletter-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
  line-height: 1.4;
}

.newsletter-excerpt {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.newsletter-footer {
  margin-top: auto;
}

.newsletter-sub-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
  box-shadow: var(--shadow-soft);
  box-sizing: border-box;
  width: 100%;
}

.sub-box-content {
  flex: 1.2;
  min-width: 260px;
}

.sub-form {
  flex: 1;
  min-width: 260px;
  display: flex;
  gap: 0.8rem;
  align-items: center;
  width: 100%;
  box-sizing: border-box;
}

.sub-form .form-input {
  flex: 1;
  min-width: 0;
  box-sizing: border-box;
}

/* -------------------------------------------------------------
   Contact Section
------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 2.5rem;
}

.contact-card {
  background: var(--bg-card);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-soft);
}

.contact-title {
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-input {
  width: 100%;
  padding: 0.8rem 1rem;
  background: var(--bg-card-inner);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* -------------------------------------------------------------
   Modals & Overlays
------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px rgba(0,0,0,0.5);
  width: 90%;
  max-width: 520px;
}

/* -------------------------------------------------------------
   Backside Intelligence (Fullscreen 360° AI Command Center)
------------------------------------------------------------- */
.backside-overlay {
  --bg-primary: #0a0e17;
  --bg-secondary: #101928;
  --bg-card: #152238;
  --bg-card-inner: #1a2a46;
  --bg-card-inner-hover: #223758;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #8899ac;
  --border-color: rgba(201, 168, 76, 0.35);
  --border-light: rgba(255, 255, 255, 0.10);
  --accent-primary: #D4AF37;
  --accent-secondary: #AA822A;
  --accent-glow: rgba(212, 175, 55, 0.15);
  --accent-gradient: linear-gradient(135deg, #D4AF37 0%, #F5E6B3 50%, #AA822A 100%);
  color: #f1f5f9;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 14, 23, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 2500;
  opacity: 0;
  visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.backside-overlay.active {
  opacity: 1;
  visibility: visible;
}

.backside-container {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--bg-primary);
  color: var(--text-primary);
}

.backside-header {
  padding: 1.25rem 2rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.b-title {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.b-title i {
  font-size: 1.8rem;
  color: var(--accent-primary);
}

.b-title h2 {
  font-size: 1.2rem;
  margin-bottom: 0.15rem;
  color: var(--text-primary);
}

.b-title span {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.b-actions {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.live-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: #22c55e;
  background: rgba(34, 197, 94, 0.1);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(34, 197, 94, 0.25);
}

.pulse-green {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  animation: pulseGlow 1.8s infinite ease-in-out;
}

.backside-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.b-sidebar {
  width: 280px;
  background: var(--bg-card);
  border-right: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1rem;
  gap: 0.5rem;
}

.b-tab-btn {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  text-align: left;
  transition: var(--transition);
}

.b-tab-btn i {
  font-size: 1.1rem;
  width: 20px;
  text-align: center;
}

.b-tab-btn:hover {
  background: var(--bg-card-inner);
  color: var(--text-primary);
}

.b-tab-btn.active {
  background: var(--accent-glow);
  color: var(--accent-primary);
  border-left: 3px solid var(--accent-primary);
}

.b-content {
  flex: 1;
  overflow-y: auto;
  padding: 2.5rem;
  background: var(--bg-primary);
  color: var(--text-primary);
}

.pane-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-light);
}

.pane-header h3 {
  font-size: 1.4rem;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
  font-family: var(--font-heading);
}

.pane-header p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeInUp 0.3s ease;
}

/* Telemetry Summary Metrics */
.metrics-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.m-card {
  background: var(--bg-card-inner);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.m-card h4 {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.m-val {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-primary);
  font-family: var(--font-heading);
  margin-bottom: 0.3rem;
}

.m-change {
  font-size: 0.8rem;
  color: #22c55e;
}

/* Telemetry Table */
.table-wrapper {
  background: var(--bg-card-inner);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

.lead-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.lead-table th {
  background: var(--bg-card);
  padding: 1rem;
  color: var(--text-muted);
  font-weight: 700;
  border-bottom: 1px solid var(--border-light);
}

.lead-table td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
}

.lead-table tr:hover td {
  background: rgba(255,255,255,0.03);
}

/* Telemetry Filter Pills & Interactive Components */
.telemetry-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: var(--transition);
}

.telemetry-pill:hover {
  background: var(--bg-card-inner);
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

.telemetry-pill.active {
  background: var(--accent-glow);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  box-shadow: 0 0 10px var(--accent-glow);
}

/* Buttons inside backside overlay */
.backside-overlay .btn-secondary {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.35);
}

.backside-overlay .btn-secondary:hover {
  background: rgba(239, 68, 68, 0.25);
  border-color: #ef4444;
  color: #ffffff;
}

.backside-overlay .btn-outline {
  background: rgba(255, 255, 255, 0.04);
  color: var(--accent-primary);
  border: 1px solid var(--border-color);
}

.backside-overlay .btn-outline:hover {
  background: var(--accent-glow);
  border-color: var(--accent-primary);
  color: #ffffff;
}

.backside-overlay .form-input {
  background: var(--bg-card-inner);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
}

.backside-overlay .form-input:focus {
  border-color: var(--accent-primary);
  outline: none;
  box-shadow: 0 0 0 2px var(--accent-glow);
}

/* Executive Directive Action Button */
.btn-action-copy {
  transition: all 0.2s ease;
  font-weight: 600;
  text-decoration: none;
}

.btn-action-copy:hover {
  background: var(--accent-primary) !important;
  color: #0a0e17 !important;
  border-color: var(--accent-primary) !important;
  transform: translateY(-1px);
}

/* Conversion Funnel */
.funnel-stage {
  margin-bottom: 0.9rem;
}

.funnel-stage-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  margin-bottom: 0.35rem;
  font-weight: 600;
}

.funnel-stage-name {
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.funnel-stage-meta {
  color: var(--text-muted);
  font-size: 0.78rem;
}

.funnel-bar-track {
  width: 100%;
  height: 14px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 7px;
  overflow: hidden;
  position: relative;
}

.funnel-bar-fill {
  height: 100%;
  border-radius: 7px;
  background: var(--accent-gradient);
  transition: width 0.8s ease-in-out;
}

/* Device Breakdown */
.device-stat-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.83rem;
}

.device-label {
  width: 135px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-secondary);
}

.device-progress-bg {
  flex: 1;
  height: 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 5px;
  overflow: hidden;
}

.device-progress-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.8s ease;
}

.device-pct {
  width: 50px;
  text-align: right;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--text-primary);
}

/* Intent Heatmap Bars */
.intent-bar-row {
  margin-bottom: 0.75rem;
}

.intent-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  margin-bottom: 0.25rem;
}

.intent-track {
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 5px;
  overflow: hidden;
}

.intent-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.8s ease;
}

/* Chart View Toggle Buttons */
.chart-view-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  color: var(--text-muted);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.22rem 0.6rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: var(--transition);
}

.chart-view-toggle:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

.chart-view-toggle.active {
  background: var(--accent-glow);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  font-weight: 700;
}

/* Flow Graph & Intent Curve Visualizations */
.flow-graph-wrapper,
.intent-curve-wrapper {
  animation: fadeIn 0.4s ease;
}

.flow-stage-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.75rem;
  transition: var(--transition);
}

.flow-stage-card:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.intent-tier-card {
  transition: var(--transition);
  border: 1px solid var(--border-light);
}

.intent-tier-card:hover {
  background: rgba(255, 255, 255, 0.05) !important;
  border-color: var(--accent-primary);
  transform: translateY(-1px);
}

.executive-action-banner {
  box-shadow: 0 4px 20px -5px rgba(0, 0, 0, 0.4);
  transition: var(--transition);
}

.executive-action-banner:hover {
  border-color: var(--accent-primary) !important;
}

@media (max-width: 640px) {
  .flow-stage-cards-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
  .intent-tier-cards-grid {
    grid-template-columns: 1fr !important;
  }
}

/* Pie / Donut Chart Layout */
.chart-pie-layout {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 1.25rem;
  padding: 0.5rem 0;
  min-height: 180px;
}

.chart-pie-svg-container {
  width: 140px;
  height: 140px;
  flex-shrink: 0;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chart-pie-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
  overflow: visible;
}

.chart-pie-center-label {
  position: absolute;
  text-align: center;
  pointer-events: none;
}

.chart-pie-center-val {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--accent-primary);
  font-family: var(--font-heading);
  line-height: 1;
}

.chart-pie-center-sub {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 2px;
}

.pie-legend-list {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.pie-legend-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
}

.pie-legend-label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-secondary);
}

.pie-legend-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
}

.pie-legend-stat {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 0.8rem;
}

@media (max-width: 600px) {
  .chart-pie-layout {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
}

/* -------------------------------------------------------------
   Responsive Breakpoints
------------------------------------------------------------- */
@media (max-width: 1340px) {
  .nav-links {
    gap: 0.55rem;
  }
  .nav-item {
    font-size: 0.78rem;
  }
  .nav-btn-extra {
    display: none; /* Collapses Backside Intelligence to Backside on mid-laptops to preserve breathing room */
  }
  .navbar .nav-container {
    padding: 0 1.25rem;
  }
}

/* Tablet Landscape & Redmi Pad 2 Breakpoint */
@media (max-width: 1160px) {
  .nav-links {
    display: none; /* Collapse text links on tablets and smaller laptop windows so action buttons fit 100% unclipped */
  }
  .navbar .nav-container {
    justify-content: space-between;
    padding: 0 1.25rem;
  }
  .nav-actions {
    margin-left: auto;
    gap: 0.65rem;
  }
  .nav-btn-extra {
    display: inline;
  }
}

@media (max-width: 992px) {
  .hero-grid,
  .grid-2col,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .skills-grid,
  .framework-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .newsletter-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .newsletter-sub-box {
    flex-direction: column;
    align-items: stretch;
    gap: 1.5rem;
    padding: 2rem 1.5rem;
  }
  
  .sub-form {
    width: 100%;
  }
  
  .nav-links {
    display: none;
  }
  
  /* Collapse alternating timeline to single column */
  .timeline::before {
    left: 18px !important;
  }
  
  .timeline-item,
  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    width: 100% !important;
    left: 0 !important;
    right: auto !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
    padding-left: 3rem !important;
    padding-right: 0 !important;
    text-align: left !important;
  }
  
  .timeline-dot,
  .timeline-item:nth-child(odd) .timeline-dot,
  .timeline-item:nth-child(even) .timeline-dot {
    left: 9px !important;
    right: auto !important;
  }
  
  .backside-body {
    flex-direction: column;
  }
  
  .b-sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-light);
    flex-direction: row;
    overflow-x: auto;
  }
}

@media (max-width: 768px) {
  .book-body-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .book-spine-mockup {
    min-height: auto;
    padding: 1.4rem;
  }
  
  .book-card {
    padding: 1.5rem;
  }
}

@media (max-width: 680px) {
  .logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.06rem;
    line-height: 1.1;
    max-width: none;
  }
  .logo-prefix {
    font-size: 0.58rem;
    letter-spacing: 0.6px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-family: var(--font-body);
  }
  .logo-suffix {
    font-size: 0.9rem;
    font-weight: 800;
    letter-spacing: 0.3px;
    color: var(--text-primary);
  }
  .logo-deg {
    font-size: 0.78em;
  }
  .nav-btn-extra {
    display: none; /* Shows "Backside" on mobile for compact button width */
  }
  .nav-actions {
    gap: 0.35rem;
    margin-left: auto;
  }
  .btn-sm {
    padding: 0.35rem 0.65rem;
    font-size: 0.74rem;
  }
  .newsletter-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .newsletter-card {
    padding: 1.5rem 1.25rem;
  }
  .sub-form {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
  }
  .sub-form input {
    width: 100%;
  }
  .sub-form button {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 600px) {
  .hero {
    padding-top: 7rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .skills-grid,
  .framework-grid,
  .hero-metrics,
  .metrics-summary-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .hero-cta .btn {
    width: 100%;
  }

  .book-cta-row {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .book-cta-row .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 520px) {
  .navbar .nav-container {
    padding: 0 0.65rem;
    gap: 0.25rem;
  }
  #open-backside-btn span {
    display: none; /* Icon-only button on mobile screens under 520px */
  }
  #open-backside-btn {
    padding: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  .icon-btn {
    width: 32px;
    height: 32px;
    font-size: 0.95rem;
  }
  .nav-actions {
    gap: 0.25rem;
  }
  .btn-sm {
    padding: 0.32rem 0.6rem;
    font-size: 0.72rem;
    height: 32px;
  }
}

@media (max-width: 380px) {
  .navbar .nav-container {
    padding: 0 0.45rem;
    gap: 0.2rem;
  }
  .logo-prefix {
    font-size: 0.54rem;
  }
  .logo-suffix {
    font-size: 0.82rem;
  }
  .btn-sm {
    padding: 0.3rem 0.5rem;
    font-size: 0.7rem;
  }
}

/* Financial Portfolio Options Line Mapper & Velocity Engine */
.financial-line-mapper-card {
  box-shadow: 0 8px 32px -8px rgba(0, 0, 0, 0.45);
  transition: var(--transition);
}

.financial-line-mapper-card:hover {
  border-color: rgba(201, 168, 76, 0.4);
}

.financial-live-indicator {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(34, 197, 94, 0.15);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.35);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.financial-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 8px #22c55e;
  animation: pulse 1.5s infinite;
}

.financial-channel-pill-group,
.financial-timeframe-pill-group {
  display: inline-flex;
  background: rgba(0, 0, 0, 0.25);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  gap: 2px;
}

.fin-channel-btn,
.fin-timeframe-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.28rem 0.65rem;
  border-radius: 4px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.2s ease;
}

.fin-channel-btn:hover,
.fin-timeframe-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.fin-channel-btn.active,
.fin-timeframe-btn.active {
  background: var(--accent-primary);
  color: #0a0e17;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(201, 168, 76, 0.3);
}

.financial-ticker-ribbon {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
}

.fin-ticker-main {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.fin-ticker-val {
  font-size: 1.95rem;
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1;
}

.fin-ticker-delta {
  font-size: 0.95rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 3px 8px;
  border-radius: 4px;
}

.status-badge-increase {
  color: #22c55e;
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.35);
}

.status-badge-decline {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
}

.status-badge-stable {
  color: #C9A84C;
  background: rgba(201, 168, 76, 0.12);
  border: 1px solid rgba(201, 168, 76, 0.35);
}

.fin-ticker-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 700;
}

.fin-metric-tile {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
  transition: var(--transition);
}

.fin-metric-tile:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.fin-metric-tile-title {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.fin-metric-tile-val {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-heading);
}

.fin-metric-tile-sub {
  font-size: 0.72rem;
  margin-top: 0.2rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

/* Hover crosshair tooltip */
.fin-interactive-tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(18, 24, 36, 0.96);
  border: 1px solid var(--accent-primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  font-size: 0.76rem;
  color: var(--text-primary);
  z-index: 20;
  display: none;
  backdrop-filter: blur(8px);
  min-width: 150px;
  transform: translate(-50%, -120%);
  transition: opacity 0.15s ease, transform 0.15s ease;
}

@media (max-width: 900px) {
  .financial-metrics-ribbon {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}

@media (max-width: 600px) {
  .financial-channel-pill-group,
  .financial-timeframe-pill-group {
    width: 100%;
    justify-content: space-between;
  }
  .financial-metrics-ribbon {
    grid-template-columns: 1fr !important;
  }
}

@media print {
  html, body {
    display: none !important;
    visibility: hidden !important;
  }
}