/* ==========================================================================
   Capitu Leitor PDF/EPUB PREMIUM — Design System & Stylesheet
   Estética: Tons claros, inspiração em papel e leitura, tipografia requintada.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Variáveis & Tokens do Design System
   -------------------------------------------------------------------------- */
:root {
  /* Paleta de Cores Principais */
  --bg-main: #FAF7F2;          /* Papel creme claro levemente aquecido */
  --bg-surface: #FFFFFF;       /* Branco puro para cards e elementos elevados */
  --bg-surface-alt: #F3EFEA;   /* Pergaminho suave para fundos secundários */
  --bg-dark-paper: #231C18;    /* Papel escuro/café profundo para seções contrastantes */

  /* Cores de Texto */
  --text-primary: #2C221E;     /* Café muito escuro (substitui o preto puro para leitura mais suave) */
  --text-secondary: #6E6259;   /* Taupe aconchegante para descrições e legendas */
  --text-muted: #9C9088;       /* Tom neutro para textos secundários e bordas finas */
  --text-inverse: #FAF7F2;     /* Texto claro em fundos escuros */

  /* Cores de Acento & Marca */
  --color-primary: #C86D40;    /* Terracota elegante (Tom principal de destaque) */
  --color-primary-hover: #B25A2E;
  --color-primary-light: #F9EFEA;
  
  --color-gold: #D99B26;       /* Dourado quente para Conquistas & Troféus */
  --color-gold-light: #FDF7E7;
  
  --color-green: #2D7A58;      /* Verde sálvia/floresta para checks e selos */
  --color-green-light: #EBF5F0;

  --color-border: #E8E2D9;     /* Bordas suaves estilo páginas de livro */
  --color-border-hover: #D6CCC0;

  /* Tipografia */
  --font-serif: 'Lora', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Sombras Recortadas e Macias */
  --shadow-sm: 0 2px 8px rgba(44, 34, 30, 0.04);
  --shadow-md: 0 8px 24px rgba(44, 34, 30, 0.06);
  --shadow-lg: 0 16px 40px rgba(44, 34, 30, 0.1);
  --shadow-glow: 0 0 30px rgba(200, 109, 64, 0.15);

  /* Transições & Raios de Borda */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   2. Reset & Estilos Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, .font-serif {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
}

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

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

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

button, input {
  font-family: inherit;
}

/* Container Responsivo */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --------------------------------------------------------------------------
   3. Componentes Genéricos & Utilitários
   -------------------------------------------------------------------------- */
/* Botões Premium */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.85rem 1.75rem;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-pill);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(200, 109, 64, 0.25);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 109, 64, 0.35);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--bg-surface-alt);
  border-color: var(--color-border-hover);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.btn-playstore {
  background: linear-gradient(135deg, #1F1916 0%, #3D302A 100%);
  color: #FFFFFF;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 20px rgba(31, 25, 22, 0.2);
}

.btn-playstore:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(31, 25, 22, 0.3);
  color: #FFFFFF;
}

.btn-playstore svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* Badges & Tags */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border: 1px solid rgba(200, 109, 64, 0.2);
}

.badge-gold {
  background-color: var(--color-gold-light);
  color: #A37115;
  border-color: rgba(217, 155, 38, 0.3);
}

.badge-green {
  background-color: var(--color-green-light);
  color: var(--color-green);
  border-color: rgba(45, 122, 88, 0.3);
}

/* Títulos de Seção */
.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 3.5rem auto;
}

.section-header h2 {
  font-size: 2.35rem;
  margin-top: 0.75rem;
  margin-bottom: 1rem;
}

.section-header p {
  font-size: 1.125rem;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   4. Header & Navegação
   -------------------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(250, 247, 242, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.logo-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.logo-tag {
  font-size: 0.68rem;
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: 0.05em;
  background-color: var(--color-primary);
  color: #FFFFFF;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  vertical-align: middle;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
}

/* --------------------------------------------------------------------------
   5. Hero Section
   -------------------------------------------------------------------------- */
.hero {
  padding: 4rem 0 5rem 0;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-title {
  font-size: 3.25rem;
  margin-top: 1rem;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.hero-title span {
  color: var(--color-primary);
  font-style: italic;
}

.hero-description {
  font-size: 1.2rem;
  line-height: 1.7;
  margin-bottom: 2rem;
  color: var(--text-secondary);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-features-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  border-top: 1px dashed var(--color-border);
  padding-top: 1.5rem;
  width: 100%;
}

.hero-feature-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.hero-feature-item svg {
  width: 18px;
  height: 18px;
  color: var(--color-green);
  flex-shrink: 0;
}

.hero-image-wrapper {
  position: relative;
}

.hero-image-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--bg-surface);
  background-color: var(--bg-surface-alt);
}

.hero-image-card img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-normal);
}

.hero-image-card:hover img {
  transform: scale(1.02);
}

.hero-floating-badge {
  position: absolute;
  bottom: -20px;
  left: -20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 0.85rem;
  z-index: 2;
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.floating-icon {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background-color: var(--color-gold-light);
  color: var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
}

.floating-text strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.floating-text span {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   6. Seção de Estatísticas & Destaques Rápidos
   -------------------------------------------------------------------------- */
.stats-banner {
  background-color: var(--bg-surface);
  border-y: 1px solid var(--color-border);
  padding: 2.5rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-card {
  padding: 1rem;
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.stat-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   7. Seção de Recursos de Leitura (Imersivo & Conforto)
   -------------------------------------------------------------------------- */
.reading-experience {
  padding: 6rem 0;
  background-color: var(--bg-main);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

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

.feature-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
}

.feature-card h3 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.feature-card p {
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Highlight Box dentro de Recursos */
.reader-highlight-box {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, #F5EDE4 0%, #EFE5D9 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  margin-top: 2rem;
}

.highlight-content h3 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.highlight-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.highlight-visual {
  background-color: var(--bg-surface);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.quote-snippet {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--text-primary);
  line-height: 1.7;
  border-left: 3px solid var(--color-primary);
  padding-left: 1.25rem;
  margin-bottom: 1rem;
}

.quote-author {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-left: 1.25rem;
}

/* --------------------------------------------------------------------------
   8. Seção de Gamificação & Conquistas
   -------------------------------------------------------------------------- */
.gamification-section {
  padding: 6rem 0;
  background-color: var(--bg-surface-alt);
  border-y: 1px solid var(--color-border);
}

.gamification-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.streak-card-preview {
  background-color: var(--bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-md);
}

.streak-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.streak-title-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.fire-badge {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: #FDF2E9;
  color: #E65100;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.goal-ring-demo {
  position: relative;
  width: 140px;
  height: 140px;
  margin: 1.5rem auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ring-svg {
  transform: rotate(-90deg);
  width: 100%;
  height: 100%;
}

.ring-bg {
  fill: none;
  stroke: var(--bg-surface-alt);
  stroke-width: 10;
}

.ring-progress {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 10;
  stroke-dasharray: 377;
  stroke-dashoffset: 90;
  stroke-linecap: round;
}

.ring-inner-text {
  position: absolute;
  text-align: center;
}

.ring-inner-text strong {
  font-size: 1.5rem;
  display: block;
  color: var(--text-primary);
}

.ring-inner-text span {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Badges Grid (6 Conquistas Reais) */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.achievement-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  transition: transform var(--transition-fast);
}

.achievement-item:hover {
  transform: translateY(-2px);
  border-color: var(--color-gold);
}

.achievement-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background-color: var(--color-gold-light);
  color: var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.achievement-info h4 {
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
  font-family: var(--font-sans);
  font-weight: 700;
}

.achievement-info p {
  font-size: 0.8rem;
  line-height: 1.4;
}

/* --------------------------------------------------------------------------
   9. Seção de Catálogo Curado & Biblioteca
   -------------------------------------------------------------------------- */
.catalog-section {
  padding: 6rem 0;
  background-color: var(--bg-main);
}

.catalog-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.catalog-cards-stack {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.collection-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.collection-card:hover {
  transform: translateX(6px);
  border-color: var(--color-primary);
}

.collection-meta h4 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.collection-meta p {
  font-size: 0.85rem;
}

.collection-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  background-color: var(--bg-surface-alt);
  color: var(--text-secondary);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-pill);
}

/* --------------------------------------------------------------------------
   10. Galeria de Screenshots Interativa
   -------------------------------------------------------------------------- */
.screenshots-section {
  padding: 6rem 0;
  background-color: var(--bg-surface);
  border-y: 1px solid var(--color-border);
}

.screenshots-scroll-wrapper {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  padding: 1rem 0.5rem 2rem 0.5rem;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.screenshots-scroll-wrapper::-webkit-scrollbar {
  height: 6px;
}

.screenshots-scroll-wrapper::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: var(--radius-pill);
}

.screenshot-item {
  flex: 0 0 260px;
  scroll-snap-align: center;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 3px solid var(--bg-surface-alt);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  background-color: var(--bg-surface-alt);
}

.screenshot-item:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.screenshot-item img {
  width: 100%;
  height: auto;
  display: block;
}

/* Lightbox Modal */
.modal-lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(35, 28, 24, 0.85);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  position: relative;
  max-width: 90%;
  max-height: 90vh;
}

.modal-content img {
  max-height: 85vh;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: #FFFFFF;
  font-size: 2rem;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   11. Seção Versão Premium
   -------------------------------------------------------------------------- */
.premium-section {
  padding: 6rem 0;
  background-color: var(--bg-dark-paper);
  color: var(--text-inverse);
  position: relative;
}

.premium-card-wrapper {
  background: linear-gradient(135deg, #2D231E 0%, #3D302A 100%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 4rem 3rem;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.premium-card-wrapper h2 {
  color: #FFFFFF;
  font-size: 2.5rem;
  margin-top: 1rem;
  margin-bottom: 1rem;
}

.premium-card-wrapper p {
  color: rgba(250, 247, 242, 0.8);
  font-size: 1.15rem;
  max-width: 650px;
  margin: 0 auto 2.5rem auto;
}

.premium-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  text-align: left;
  margin-bottom: 3rem;
}

.premium-feature-box {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.premium-feature-box h4 {
  color: #FFFFFF;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.premium-feature-box p {
  font-size: 0.88rem;
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   12. Perguntas Frequentes (FAQ Accordion)
   -------------------------------------------------------------------------- */
.faq-section {
  padding: 6rem 0;
  background-color: var(--bg-main);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--color-primary);
}

.faq-question {
  width: 100%;
  padding: 1.5rem;
  text-align: left;
  background: none;
  border: none;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.25rem;
  transition: transform var(--transition-fast);
  color: var(--color-primary);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
  padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 1.5rem 1.5rem 1.5rem;
}

.faq-answer p {
  font-size: 0.98rem;
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   13. Call To Action Final
   -------------------------------------------------------------------------- */
.cta-final {
  padding: 6rem 0;
  background: linear-gradient(180deg, var(--bg-main) 0%, var(--bg-surface-alt) 100%);
  text-align: center;
}

.cta-box {
  max-width: 800px;
  margin: 0 auto;
}

.cta-box h2 {
  font-size: 2.75rem;
  margin-bottom: 1.25rem;
}

.cta-box p {
  font-size: 1.2rem;
  margin-bottom: 2.5rem;
}

/* --------------------------------------------------------------------------
   14. Rodapé (Footer)
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--bg-dark-paper);
  color: rgba(250, 247, 242, 0.7);
  padding: 4rem 0 2rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand .logo {
  color: #FFFFFF;
  margin-bottom: 1rem;
}

.footer-brand p {
  color: rgba(250, 247, 242, 0.65);
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h4 {
  color: #FFFFFF;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links a {
  color: rgba(250, 247, 242, 0.7);
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* --------------------------------------------------------------------------
   15. Media Queries Responsivos
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
  .hero-grid,
  .reader-highlight-box,
  .gamification-layout,
  .catalog-split {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

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

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: var(--bg-surface);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    box-shadow: var(--shadow-lg);
    display: none;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-menu.active {
    display: flex;
  }

  .mobile-toggle {
    display: block;
  }

  .features-grid,
  .premium-features-grid,
  .achievements-grid {
    grid-template-columns: 1fr;
  }

  .hero-floating-badge {
    position: static;
    margin-top: 1rem;
  }

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

  .hero-title {
    font-size: 2.1rem;
  }

  .section-header h2 {
    font-size: 1.85rem;
  }
}