:root {
  --primary-color: #2C5F6F;
  --secondary-color: #6B8E99;
  --accent-color: #C9A871;
  --dark-color: #1a1a1a;
  --medium-gray: #4a4a4a;
  --light-gray: #f5f5f5;
  --off-white: #fafafa;
  --text-color: #333;
  --text-light: #666;
  --border-color: #e0e0e0;
}

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

body {
  font-family: 'Georgia', 'Times New Roman', serif;
  line-height: 1.8;
  color: var(--text-color);
  background: #fff;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 40px;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: 'Segoe UI', 'Helvetica Neue', sans-serif;
  line-height: 1.3;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, #fafafa 0%, #f0f0f0 100%);
  padding: 100px 40px 80px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.hero-intro {
  max-width: 800px;
  margin: 0 auto;
}

.hero-label {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--secondary-color);
  margin-bottom: 20px;
  font-family: 'Segoe UI', sans-serif;
}

.hero-title {
  font-size: 4rem;
  font-weight: 300;
  margin-bottom: 15px;
  color: var(--primary-color);
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--medium-gray);
  margin-bottom: 30px;
  font-family: 'Georgia', serif;
  font-style: italic;
}

.hero-tagline {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* Book Showcase */
.book-showcase {
  background: #fff;
  padding: 80px 40px;
}

.book-images {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

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

.book-item img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.book-item img:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.25);
}

.image-caption {
  margin-top: 20px;
  font-size: 0.95rem;
  color: var(--text-light);
  font-family: 'Segoe UI', sans-serif;
}

/* Sections */
section {
  padding: 80px 40px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 300;
  text-align: center;
  margin-bottom: 40px;
  color: var(--primary-color);
  letter-spacing: -0.5px;
}

.section-lead {
  font-size: 1.5rem;
  text-align: center;
  margin-bottom: 40px;
  color: var(--medium-gray);
  font-style: italic;
  line-height: 1.6;
}

/* Concept Section */
.concept-section {
  background: var(--off-white);
}

.concept-header {
  max-width: 800px;
  margin: 0 auto 50px;
}

.concept-content {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.15rem;
  line-height: 1.9;
}

.concept-content p {
  margin-bottom: 25px;
}

.concept-content strong {
  color: var(--primary-color);
  font-weight: 600;
}

/* Sinopse Section */
.sinopse-section {
  background: #fff;
  padding: 80px 40px;
}

.sinopse-intro {
  text-align: center;
  margin-bottom: 50px;
}

.sinopse-tagline {
  font-size: 1.3rem;
  color: var(--medium-gray);
  font-style: italic;
  line-height: 1.8;
  max-width: 800px;
  margin: 0 auto;
}

.sinopse-content {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.15rem;
  line-height: 1.9;
}

.sinopse-lead {
  font-size: 1.8rem;
  text-align: center;
  margin-bottom: 40px;
  color: var(--primary-color);
  font-weight: 300;
  line-height: 1.5;
}

.sinopse-content p {
  margin-bottom: 25px;
  text-align: justify;
}

.sinopse-conclusion {
  margin-top: 40px;
  padding: 30px;
  background: var(--light-gray);
  border-left: 5px solid var(--accent-color);
  border-radius: 5px;
  font-size: 1.2rem;
  text-align: left !important;
}

/* Chapters Section */
.chapters-section {
  background: var(--off-white);
  padding: 80px 40px;
}

.chapters-intro {
  text-align: center;
  font-size: 1.2rem;
  color: var(--text-light);
  font-style: italic;
  margin-bottom: 60px;
}

.chapters-parts {
  max-width: 900px;
  margin: 0 auto;
}

.chapter-part {
  background: white;
  border-radius: 10px;
  padding: 40px;
  margin-bottom: 40px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
  border-top: 5px solid var(--primary-color);
}

.chapter-part:nth-child(2) {
  border-top-color: var(--secondary-color);
}

.chapter-part:nth-child(3) {
  border-top-color: var(--accent-color);
}

.chapter-part:nth-child(4) {
  border-top-color: var(--medium-gray);
}

.part-header {
  margin-bottom: 30px;
  padding-bottom: 25px;
  border-bottom: 2px solid var(--border-color);
}

.part-number {
  display: inline-block;
  background: var(--primary-color);
  color: white;
  padding: 8px 20px;
  border-radius: 5px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 15px;
  font-family: 'Segoe UI', sans-serif;
}

.chapter-part:nth-child(2) .part-number {
  background: var(--secondary-color);
}

.chapter-part:nth-child(3) .part-number {
  background: var(--accent-color);
  color: var(--dark-color);
}

.chapter-part:nth-child(4) .part-number {
  background: var(--medium-gray);
}

.part-title {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 10px;
  font-weight: 400;
}

.part-subtitle {
  font-size: 1.1rem;
  color: var(--text-light);
  font-style: italic;
}

.chapters-list {
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.chapter-item {
  padding: 25px;
  background: var(--off-white);
  border-radius: 8px;
  border-left: 4px solid var(--accent-color);
  transition: all 0.3s ease;
}

.chapter-item:hover {
  border-left-width: 6px;
  transform: translateX(5px);
  box-shadow: 0 3px 15px rgba(0, 0, 0, 0.1);
}

.chapter-item h4 {
  font-size: 1.3rem;
  color: var(--dark-color);
  margin-bottom: 12px;
  font-weight: 500;
  font-family: 'Segoe UI', sans-serif;
}

.chapter-item p {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-light);
  margin: 0;
}

/* Context Section */
.context-section {
  background: #fff;
}

.context-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 40px;
  max-width: 900px;
  margin: 0 auto;
}

.context-card {
  padding: 40px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--off-white);
}

.context-card.highlight {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.context-card h3 {
  font-size: 1.5rem;
  margin-bottom: 25px;
  font-weight: 400;
}

.context-card ul {
  list-style: none;
  padding: 0;
}

.context-card ul li {
  padding: 10px 0;
  padding-left: 25px;
  position: relative;
  font-size: 1.05rem;
}

.context-card ul li:before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--secondary-color);
  font-weight: bold;
}

.context-card.highlight ul li:before {
  color: var(--accent-color);
}

.big-text {
  font-size: 1.3rem;
  line-height: 1.6;
  margin-bottom: 20px;
  font-weight: 500;
}

.emphasis {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--accent-color);
}

/* Proposal Section */
.proposal-section {
  background: var(--off-white);
}

.proposal-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  max-width: 1000px;
  margin: 0 auto;
}

.proposal-text h3 {
  font-size: 1.8rem;
  margin-bottom: 30px;
  color: var(--primary-color);
  font-weight: 400;
}

.proposal-list {
  list-style: none;
  padding: 0;
}

.proposal-list li {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 25px;
  font-size: 1.1rem;
}

.proposal-list i {
  color: var(--accent-color);
  font-size: 1.5rem;
  margin-top: 3px;
  flex-shrink: 0;
}

.approach-box {
  background: white;
  padding: 40px;
  border-radius: 8px;
  border-left: 5px solid var(--accent-color);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.approach-box h4 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--primary-color);
  font-weight: 400;
}

.approach-box p {
  margin-bottom: 20px;
  font-size: 1.05rem;
}

.approach-box ul {
  list-style: none;
  padding: 0;
}

.approach-box ul li {
  padding: 8px 0;
  padding-left: 25px;
  position: relative;
  font-size: 1.05rem;
}

.approach-box ul li:before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent-color);
}

/* Audience Section */
.audience-section {
  background: #fff;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.audience-item {
  padding: 30px;
  text-align: center;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--off-white);
  transition: all 0.3s ease;
}

.audience-item:hover {
  border-color: var(--accent-color);
  transform: translateY(-3px);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.audience-item i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.audience-item p {
  font-size: 1.05rem;
  line-height: 1.7;
}

/* Not Section */
.not-section {
  background: var(--off-white);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.not-content {
  max-width: 700px;
  margin: 0 auto;
}

.not-list {
  list-style: none;
  padding: 0;
  margin-bottom: 40px;
}

.not-list li {
  padding: 15px 0;
  font-size: 1.2rem;
  color: var(--medium-gray);
  border-bottom: 1px solid var(--border-color);
}

.not-list li:last-child {
  border-bottom: none;
}

.not-conclusion {
  font-size: 1.4rem;
  text-align: center;
  color: var(--primary-color);
  font-style: italic;
  line-height: 1.6;
}

/* Author Section */
.author-section {
  background: #fff;
}

.author-content {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 60px;
  max-width: 1000px;
  margin: 0 auto;
  align-items: start;
}

.author-image img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

.author-text h3 {
  font-size: 2rem;
  margin-bottom: 10px;
  color: var(--primary-color);
  font-weight: 400;
}

.author-role {
  font-size: 1.1rem;
  color: var(--secondary-color);
  margin-bottom: 30px;
  font-family: 'Segoe UI', sans-serif;
}

.author-bio p {
  margin-bottom: 20px;
  font-size: 1.05rem;
  line-height: 1.8;
}

.author-quote {
  margin-top: 30px;
  padding: 25px;
  border-left: 4px solid var(--accent-color);
  background: var(--off-white);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--primary-color);
}

/* Why Section */
.why-section {
  background: var(--off-white);
}

.why-comparison {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 40px;
  max-width: 900px;
  margin: 0 auto 50px;
  align-items: center;
}

.comparison-side {
  padding: 40px;
  background: white;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.comparison-side.highlight {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.comparison-side h3 {
  font-size: 1.3rem;
  margin-bottom: 20px;
  font-weight: 400;
}

.comparison-side ul {
  list-style: none;
  padding: 0;
}

.comparison-side ul li {
  padding: 10px 0;
  font-size: 1.1rem;
}

.comparison-arrow {
  font-size: 3rem;
  color: var(--accent-color);
}

.why-conclusion {
  text-align: center;
  font-size: 1.3rem;
  color: var(--medium-gray);
  font-style: italic;
}

/* Status Section */
.status-section {
  background: #fff;
  border-top: 1px solid var(--border-color);
}

.status-grid {
  display: flex;
  justify-content: center;
  gap: 50px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 15px;
  font-size: 1.1rem;
  font-family: 'Segoe UI', sans-serif;
}

.status-item i {
  font-size: 1.5rem;
}

.status-item.completed i {
  color: var(--accent-color);
}

.status-item.progress i {
  color: var(--secondary-color);
}

.status-description {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.status-description p {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-light);
}

/* Footer */
.footer {
  background: var(--dark-color);
  color: rgba(255, 255, 255, 0.7);
  padding: 50px 40px;
  text-align: center;
  font-family: 'Segoe UI', sans-serif;
}

.footer-note {
  font-size: 0.9rem;
  margin-bottom: 15px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-tagline {
  font-size: 1rem;
  color: var(--accent-color);
  font-style: italic;
  margin-bottom: 10px;
}

.footer-copyright {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

/* Responsive */
@media (max-width: 968px) {
  .container {
    padding: 0 25px;
  }
  
  section {
    padding: 60px 25px;
  }
  
  .hero-title {
    font-size: 3rem;
  }
  
  .hero-subtitle {
    font-size: 1.2rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .book-images {
    grid-template-columns: 1fr;
  }
  
  .context-grid,
  .proposal-content,
  .author-content,
  .why-comparison {
    grid-template-columns: 1fr;
  }
  
  .comparison-arrow {
    transform: rotate(90deg);
  }
  
  .author-content {
    text-align: center;
  }
  
  .author-image {
    max-width: 300px;
    margin: 0 auto;
  }
}

@media (max-width: 576px) {
  .hero-title {
    font-size: 2.2rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .section-lead {
    font-size: 1.2rem;
  }
}