/* Modern CSS Reset and Variables */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Academic color palette */
  --primary: #1e40af;
  --primary-dark: #1e3a8a;
  --primary-light: #3b82f6;
  --secondary: #374151;
  --accent: #6b7280;
  --success: #059669;
  --warning: #d97706;

  /* Conservative academic colors */
  --background: #ffffff;
  --surface: #f9fafb;
  --surface-light: #f3f4f6;
  --surface-lighter: #e5e7eb;
  --text-primary: #111827;
  --text-secondary: #374151;
  --text-muted: #6b7280;
  --border: #d1d5db;
  --border-light: #e5e7eb;

  /* Academic accent colors */
  --book-accent: #1f2937;
  --book-highlight: #f3f4f6;
  --audio-accent: #059669;

  /* Academic typography */
  --font-primary: 'Georgia', 'Times New Roman', serif;
  --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Monaco', monospace;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Layout */
  --container-max: 1200px;
  --container-padding: 2rem;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-book: 0 20px 60px rgba(0, 0, 0, 0.4);

  /* Animations */
  --transition: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base styles */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--background);
  overflow-x: hidden;
  letter-spacing: 0.01em;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: var(--space-md) 0;
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-secondary);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.brand-icon {
  font-size: 1.5rem;
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--surface);
}

.audio-controls {
  display: flex;
  gap: var(--space-xs);
}

.audio-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-xs) var(--space-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.875rem;
  font-family: var(--font-secondary);
  font-weight: 500;
}

.audio-btn:hover {
  background: var(--surface-light);
  color: var(--text-primary);
}

.hidden { display: none; }

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--background);
  position: relative;
  overflow: hidden;
  padding: calc(80px + var(--space-lg)) var(--space-md) var(--space-lg);
}

.hero-container {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: var(--space-3xl);
  align-items: center;
  width: 100%;
}

.hero-content {
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-md);
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid var(--primary);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-md);
}

.badge-text {
  color: var(--primary-light);
  font-weight: 500;
  font-size: 0.875rem;
}

.hero-title {
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  font-weight: 700;
  font-family: var(--font-secondary);
}

.hero-subtitle {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  font-weight: 400;
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
}

.hero-description {
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  max-width: 600px;
}

.hero-awards {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.award-item {
  padding: var(--space-xs) var(--space-md);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--book-gold);
  font-size: 0.875rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.cta-button.primary {
  background: var(--primary);
  color: white;
}

.cta-button.primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.cta-button.secondary {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.cta-button.secondary:hover {
  background: var(--surface-light);
  transform: translateY(-2px);
}

.cta-button.tertiary {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.cta-button.tertiary:hover {
  background: var(--surface);
  color: var(--text-primary);
}

.cta-button.large {
  padding: var(--space-lg) var(--space-xl);
  font-size: 1.125rem;
}

.author-links {
  display: flex;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
  flex-wrap: wrap;
  justify-content: center;
}

.author-link {
  color: var(--primary);
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  text-decoration: none;
  font-family: var(--font-secondary);
  font-size: 0.9rem;
}

.author-link:hover {
  background: var(--surface);
  border-color: var(--primary);
}

.quick-chapter-btn {
  padding: var(--space-xs) var(--space-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--audio-green);
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
}

.quick-chapter-btn:hover {
  background: var(--surface-light);
  transform: scale(1.05);
}

/* Hero Visual */
.hero-visual {
  position: relative;
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.book-cover-container {
  position: relative;
  max-width: 300px;
  width: 100%;
}

.book-cover {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-book);
  transition: var(--transition-slow);
  position: relative;
  z-index: 2;
}

.book-cover:hover {
  transform: scale(1.05) rotate(2deg);
}

.book-glow {
  position: absolute;
  inset: -20px;
  background: linear-gradient(45deg, var(--primary), var(--secondary), var(--accent));
  border-radius: var(--radius-lg);
  opacity: 0.3;
  filter: blur(20px);
  z-index: 1;
  animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
  from { opacity: 0.3; transform: scale(1); }
  to { opacity: 0.5; transform: scale(1.05); }
}

.floating-elements {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.float-element {
  position: absolute;
  font-size: 2rem;
  opacity: 0.1;
  animation: float 6s ease-in-out infinite;
  animation-delay: var(--delay);
}

.float-element:nth-child(1) { top: 10%; left: 10%; }
.float-element:nth-child(2) { top: 20%; right: 10%; }
.float-element:nth-child(3) { bottom: 30%; left: 5%; }
.float-element:nth-child(4) { bottom: 10%; right: 15%; }

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); opacity: 0.1; }
  50% { transform: translateY(-20px) rotate(5deg); opacity: 0.3; }
}

/* Sections */
.main-content {
  padding-top: 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
  color: var(--text-primary);
  font-family: var(--font-secondary);
}

.section-description {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin: 0 auto var(--space-xl);
  max-width: 600px;
}

/* Book Section */
.book-section {
  padding: var(--space-3xl) 0;
  background: var(--surface);
}

.book-content {
  max-width: 800px;
  margin: 0 auto;
}

.book-description {
  margin-bottom: var(--space-xl);
}

.description-text h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.description-text p {
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.author-section {
  background: var(--background);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.author-info {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}

.author-photo {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.author-details h4 {
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
  font-size: 1.25rem;
}

.author-title {
  color: var(--primary-light);
  font-weight: 600;
  margin-bottom: var(--space-md);
  font-size: 1rem;
}

.author-bio {
  max-width: none;
}

.author-bio p {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.7;
  font-size: 1rem;
}

.author-bio p:last-child {
  margin-bottom: 0;
}

.bio-summary {
  margin-bottom: var(--space-sm);
}

.bio-expanded {
  transition: var(--transition);
}

.bio-toggle {
  background: none;
  border: none;
  color: var(--primary);
  font-family: var(--font-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  padding: var(--space-xs) 0;
  text-decoration: underline;
  transition: var(--transition);
}

.bio-toggle:hover {
  color: var(--primary-dark);
}

/* Audio Section */
.audio-section {
  padding: var(--space-3xl) 0;
}

.audio-player-container {
  max-width: 800px;
  margin: 0 auto var(--space-xl);
}

.audio-player {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.player-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.now-playing .track-info h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
  font-size: 1.25rem;
}

.now-playing .track-info p {
  color: var(--text-muted);
  margin: 0;
  font-size: 0.875rem;
}

.player-controls {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

.control-btn {
  background: var(--surface-light);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1.125rem;
}

.control-btn:hover:not(:disabled) {
  background: var(--surface-lighter);
  transform: scale(1.1);
}

.control-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.main-play-btn {
  width: 64px;
  height: 64px;
  background: var(--audio-green);
  font-size: 1.5rem;
  color: white;
}

.main-play-btn:hover {
  background: #16a34a;
}

.progress-container {
  margin-bottom: var(--space-lg);
}

.time-display {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-xs);
  font-size: 0.875rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.progress-bar {
  position: relative;
  height: 6px;
  background: var(--surface-light);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--audio-green);
  width: 0%;
  transition: width 0.1s ease;
}

.progress-slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.player-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.volume-control,
.speed-control {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.volume-slider,
.speed-control select {
  background: var(--surface-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: var(--space-xs);
}

/* Chapters Grid */
.chapters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.chapter-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  transition: var(--transition);
  cursor: pointer;
}

.chapter-card:hover {
  background: var(--surface-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.chapter-card.playing {
  border-color: var(--audio-green);
  background: rgba(34, 197, 94, 0.1);
}

.chapter-number {
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.chapter-content {
  flex: 1;
}

.chapter-content h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
  font-size: 1.125rem;
}

.chapter-content p {
  color: var(--text-secondary);
  margin: 0;
  font-size: 0.875rem;
}

.chapter-play-btn {
  background: var(--audio-green);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
  color: white;
  flex-shrink: 0;
}

.chapter-play-btn:hover {
  background: #16a34a;
  transform: scale(1.1);
}

/* Awards Section */
.awards-section {
  padding: var(--space-3xl) 0;
  background: var(--surface);
}

.awards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.award-card {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  transition: var(--transition);
}

.award-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--book-gold);
}

.award-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
}

.award-card h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  font-size: 1.25rem;
}

.award-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.testimonials {
  text-align: center;
  margin-top: var(--space-xl);
}

.testimonials h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.testimonial-card {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.testimonial-content p {
  font-size: 1.125rem;
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.testimonial-author {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

/* Press Section */
.press-section {
  padding: var(--space-3xl) 0;
}

.press-content {
  max-width: 800px;
  margin: 0 auto;
}

.elevator-pitch {
  background: var(--surface);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  margin-bottom: var(--space-xl);
  text-align: center;
}

.elevator-pitch h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.pitch-text {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
}

.press-links h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  text-align: center;
}

.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-md);
}

.press-link {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

.press-link:hover {
  background: var(--surface-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.link-icon {
  font-size: 1.5rem;
  margin-top: 2px;
}

.link-content h4 {
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
  font-size: 1rem;
}

.link-content p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin: 0;
  line-height: 1.5;
}

/* Ecosystem Section */
.ecosystem-section {
  padding: var(--space-3xl) 0;
  background: var(--surface);
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.ecosystem-card {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.ecosystem-card.featured {
  border-color: var(--primary);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), var(--background));
}

.ecosystem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition);
}

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

.ecosystem-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-light);
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.card-icon {
  font-size: 2rem;
  margin-right: var(--space-sm);
}

.card-header h3 {
  color: var(--text-primary);
  margin: 0;
  flex: 1;
  min-width: 150px;
}

.card-badge {
  padding: var(--space-xs) var(--space-sm);
  background: var(--primary);
  color: white;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.ecosystem-card.featured .card-badge {
  background: var(--accent);
}

.ecosystem-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.card-links {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
}

.card-link:hover {
  background: var(--surface-light);
  color: var(--primary-light);
  border-color: var(--primary);
}


/* CTA Section */
.cta-section {
  padding: var(--space-3xl) 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  text-align: center;
}

.cta-content h2 {
  color: white;
  margin-bottom: var(--space-md);
}

.cta-content p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.125rem;
  margin-bottom: var(--space-xl);
}

.cta-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Footer */
.footer {
  background: var(--background);
  border-top: 1px solid var(--border);
  padding: var(--space-xl) 0 var(--space-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.footer-main {
  max-width: 300px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.footer-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-lg);
}

.footer-section h4 {
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  font-size: 1rem;
}

.footer-section a {
  display: block;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
  transition: var(--transition);
}

.footer-section a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Mobile Responsive Design */
@media (max-width: 768px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    text-align: center;
  }

  .hero-visual {
    order: -1;
    height: 300px;
  }

  .book-cover-container {
    max-width: 200px;
  }

  .nav-links {
    display: none;
  }

  .player-header {
    flex-direction: column;
    gap: var(--space-md);
    align-items: flex-start;
  }

  .player-footer {
    flex-direction: column;
    gap: var(--space-md);
    align-items: flex-start;
  }

  .chapters-grid {
    grid-template-columns: 1fr;
  }

  .chapter-card {
    flex-direction: column;
    text-align: center;
    gap: var(--space-sm);
  }

  .chapter-number {
    order: -1;
  }

  .awards-grid {
    grid-template-columns: 1fr;
  }

  .testimonial-grid {
    grid-template-columns: 1fr;
  }

  .links-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    text-align: center;
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .author-info {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .cta-button.large {
    width: 100%;
    max-width: 300px;
  }

  .hero-actions {
    justify-content: center;
  }

  .ecosystem-grid {
    grid-template-columns: 1fr;
  }

  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }

  .card-links {
    flex-direction: column;
  }

  .card-link {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-sm);
  }

  .hero {
    padding: calc(80px + var(--space-md)) var(--space-sm) var(--space-md);
  }

  .hero-awards {
    justify-content: center;
  }

  .award-item {
    font-size: 0.75rem;
    padding: var(--space-xs);
  }

  .audio-player {
    padding: var(--space-md);
  }

  .control-btn {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .main-play-btn {
    width: 56px;
    height: 56px;
    font-size: 1.25rem;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .float-element {
    animation: none;
  }

  .book-glow {
    animation: none;
  }
}

/* Focus styles for accessibility */
button:focus,
a:focus,
select:focus,
input:focus {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --background: #000000;
    --surface: #1a1a1a;
    --text-primary: #ffffff;
    --border: #666666;
  }
}