/* ===========================
   ROOT & DESIGN TOKENS
   =========================== */
:root {
  --cream: #FAF7F2;
  --cream-dark: #F0EAE0;
  --terracota: #C0503A;
  --terracota-light: #D97060;
  --terracota-dark: #9E3E2A;
  --black: #1A1410;
  --gray-dark: #3D3530;
  --gray-mid: #7A6E68;
  --gray-light: #B5ACA5;
  --white: #FFFFFF;
  --gold: #C8A96E;

  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', system-ui, sans-serif;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 40px;

  --shadow-sm: 0 2px 12px rgba(26,20,16,0.08);
  --shadow-md: 0 8px 32px rgba(26,20,16,0.12);
  --shadow-lg: 0 20px 60px rgba(26,20,16,0.18);
  --shadow-book: 30px 30px 60px rgba(26,20,16,0.3), 8px 8px 20px rgba(26,20,16,0.2);

  --transition: 0.25s ease;
  --max-width: 1200px;
}

/* ===========================
   RESET & BASE
   =========================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--cream);
  color: var(--black);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

.hidden {
  display: none !important;
}

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

/* ===========================
   TYPOGRAPHY
   =========================== */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-label {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--terracota);
  margin-bottom: 12px;
  background: rgba(192, 80, 58, 0.08);
  padding: 4px 14px;
  border-radius: 100px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--black);
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--gray-mid);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===========================
   BUTTONS
   =========================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--terracota);
  color: var(--white);
  padding: 14px 28px;
  border-radius: var(--radius-xl);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--terracota-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(192, 80, 58, 0.35);
}

.btn-primary.btn-lg {
  padding: 18px 36px;
  font-size: 1.05rem;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--gray-dark);
  padding: 14px 24px;
  border-radius: var(--radius-xl);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  border: 2px solid rgba(26,20,16,0.15);
  transition: all var(--transition);
}

.btn-ghost:hover {
  border-color: var(--terracota);
  color: var(--terracota);
}

.btn-ghost-dark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--terracota);
  padding: 12px 24px;
  border-radius: var(--radius-xl);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid var(--terracota);
  transition: all var(--transition);
}

.btn-ghost-dark:hover {
  background: var(--terracota);
  color: white;
}

.btn-ghost-light {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--white);
  padding: 18px 32px;
  border-radius: var(--radius-xl);
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 500;
  cursor: pointer;
  border: 2px solid rgba(255,255,255,0.4);
  transition: all var(--transition);
}

.btn-ghost-light:hover {
  border-color: white;
  background: rgba(255,255,255,0.1);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--terracota);
  padding: 13px 24px;
  border-radius: var(--radius-xl);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid var(--terracota);
  transition: all var(--transition);
  width: 100%;
  justify-content: center;
}

.btn-outline:hover {
  background: var(--terracota);
  color: white;
}

/* ===========================
   LANGUAGE BANNER
   =========================== */
.lang-banner {
  background: linear-gradient(135deg, var(--terracota), var(--terracota-dark));
  color: white;
  padding: 12px 20px;
  position: sticky;
  top: 0;
  z-index: 999;
  animation: slideDown 0.4s ease;
}

@keyframes slideDown {
  from { transform: translateY(-100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.lang-banner-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  max-width: var(--max-width);
  margin: 0 auto;
  flex-wrap: wrap;
}

.lang-banner-flag {
  font-size: 1.4rem;
}

.lang-banner-btn {
  background: rgba(255,255,255,0.2);
  color: white;
  padding: 6px 16px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.85rem;
  border: 1px solid rgba(255,255,255,0.4);
  transition: all var(--transition);
}

.lang-banner-btn:hover {
  background: white;
  color: var(--terracota);
}

.lang-banner-close {
  background: none;
  border: none;
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px 8px;
  margin-left: auto;
}

/* ===========================
   NAVIGATION
   =========================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 247, 242, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(26,20,16,0.08);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.nav-logo-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--black);
  line-height: 1.1;
}

.nav-logo-sub {
  font-size: 0.7rem;
  color: var(--terracota);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-dark);
  transition: color var(--transition);
}

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

.nav-cta {
  background: var(--terracota);
  color: white !important;
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition);
}

.nav-cta:hover {
  background: var(--terracota-dark);
  transform: translateY(-1px);
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--black);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 16px 20px;
  border-top: 1px solid rgba(26,20,16,0.08);
  background: var(--cream);
  gap: 4px;
}

.nav-mobile.open {
  display: flex;
}

.nav-mobile a {
  padding: 12px 16px;
  font-weight: 500;
  color: var(--gray-dark);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  transition: background var(--transition);
}

.nav-mobile a:hover {
  background: var(--cream-dark);
  color: var(--terracota);
}

.nav-mobile .mobile-cta {
  background: var(--terracota);
  color: white !important;
  text-align: center;
  margin-top: 8px;
  border-radius: 100px;
}

/* ===========================
   HERO
   =========================== */
.hero {
  position: relative;
  min-height: 90vh;
  background: var(--cream);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-bg-shape {
  position: absolute;
  top: -20%;
  right: -15%;
  width: 60vw;
  height: 80vh;
  background: radial-gradient(ellipse at center, rgba(192, 80, 58, 0.07) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
  padding: 60px 20px 80px;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.hero-content {
  text-align: center;
  max-width: 640px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(192, 80, 58, 0.08);
  border: 1px solid rgba(192, 80, 58, 0.2);
  color: var(--terracota);
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.05;
  color: var(--black);
  margin-bottom: 8px;
}

.hero-title em {
  font-style: italic;
  color: var(--terracota);
}

.hero-subtitle {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  font-weight: 400;
  font-style: italic;
  color: var(--gray-mid);
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--gray-dark);
  line-height: 1.75;
  margin-bottom: 28px;
}

.hero-badges-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 32px;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--white);
  border: 1px solid rgba(26,20,16,0.1);
  color: var(--gray-dark);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

.badge-pill i {
  color: var(--terracota);
}

.hero-cta-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

/* Book 3D Effect */
.hero-book {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.book-3d-wrap {
  position: relative;
  display: inline-block;
}

.book-cover {
  width: 240px;
  border-radius: 4px 12px 12px 4px;
  box-shadow: var(--shadow-book);
  transform: perspective(800px) rotateY(-8deg);
  transition: transform 0.4s ease;
}

.book-3d-wrap:hover .book-cover {
  transform: perspective(800px) rotateY(-3deg) scale(1.02);
}

.book-shadow {
  position: absolute;
  bottom: -20px;
  left: 10%;
  width: 80%;
  height: 30px;
  background: radial-gradient(ellipse, rgba(26,20,16,0.25) 0%, transparent 70%);
  filter: blur(8px);
  border-radius: 50%;
}

.book-price-tag {
  background: white;
  border-radius: var(--radius-md);
  padding: 14px 24px;
  box-shadow: var(--shadow-md);
  text-align: center;
  border: 1px solid rgba(26,20,16,0.06);
}

.price-from {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-mid);
  margin-bottom: 2px;
}

.price-value {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--terracota);
  line-height: 1;
}

.price-note {
  display: block;
  font-size: 0.72rem;
  color: var(--gray-light);
  margin-top: 4px;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 1.2rem;
  color: var(--gray-light);
  animation: bounce 2s infinite;
}

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

/* ===========================
   SOBRE
   =========================== */
.sobre {
  padding: 80px 0;
  background: var(--white);
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.feature-card {
  background: var(--cream);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid rgba(26,20,16,0.06);
  transition: all var(--transition);
}

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

.feature-icon {
  font-size: 2rem;
  margin-bottom: 14px;
}

.feature-card h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--black);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--gray-mid);
  line-height: 1.65;
}

/* ===========================
   QUIZ SECTION
   =========================== */
.quiz-section {
  padding: 80px 0;
  background: var(--cream);
}

.quiz-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px 24px;
  max-width: 600px;
  margin: 0 auto;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(26,20,16,0.06);
}

.quiz-step {
  display: none;
}

.quiz-step.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.quiz-question {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--black);
  text-align: center;
  margin-bottom: 28px;
  line-height: 1.35;
}

.quiz-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 20px;
}

.quiz-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: var(--cream);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  padding: 24px 16px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

.quiz-btn:hover {
  border-color: var(--terracota);
  background: rgba(192, 80, 58, 0.04);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.quiz-btn-icon {
  font-size: 2.2rem;
}

.quiz-btn-label {
  font-weight: 600;
  font-size: 1rem;
  color: var(--black);
}

.quiz-btn-sub {
  font-size: 0.78rem;
  color: var(--gray-mid);
  line-height: 1.3;
}

.quiz-back {
  background: none;
  border: none;
  color: var(--gray-mid);
  font-size: 0.85rem;
  cursor: pointer;
  display: block;
  margin: 0 auto;
  padding: 8px;
  transition: color var(--transition);
}

.quiz-back:hover {
  color: var(--terracota);
}

/* Quiz Result */
.quiz-result {
  text-align: center;
}

.result-badge {
  font-size: 3.5rem;
  margin-bottom: 16px;
}

#result-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 10px;
}

#result-desc {
  color: var(--gray-mid);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 24px;
}

.result-price-box {
  background: var(--cream);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  border: 1px solid rgba(26,20,16,0.08);
}

.result-price-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-mid);
}

.result-price {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--terracota);
}

.result-link {
  width: 100%;
  justify-content: center;
  margin-bottom: 12px;
}

.quiz-restart {
  margin-top: 4px;
}

/* ===========================
   COMPARATIVO / ONDE COMPRAR
   =========================== */
.comparativo {
  padding: 80px 0;
  background: var(--white);
}

.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 48px;
}

.price-card {
  background: var(--cream);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  border: 2px solid rgba(26,20,16,0.06);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all var(--transition);
  position: relative;
}

.price-card:hover {
  border-color: rgba(192, 80, 58, 0.3);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.price-card.best-deal {
  border-color: var(--terracota);
  background: white;
  box-shadow: 0 0 0 1px var(--terracota), var(--shadow-md);
}

.best-deal-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--terracota);
  color: white;
  padding: 4px 16px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.price-card-platform {
  display: flex;
  align-items: center;
  gap: 8px;
}

.platform-logo {
  height: 22px;
  width: auto;
  opacity: 0.85;
}

.platform-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-dark);
  background: rgba(26,20,16,0.06);
  padding: 4px 12px;
  border-radius: 100px;
}

.price-card-format {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.format-name {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--black);
}

.price-card-pricing {
  padding: 16px 0;
  border-top: 1px solid rgba(26,20,16,0.06);
  border-bottom: 1px solid rgba(26,20,16,0.06);
}

.price-highlight {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.price-free-tag {
  background: #22A05B;
  color: white;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 100px;
  letter-spacing: 0.08em;
}

.price-ku {
  font-size: 0.85rem;
  color: var(--gray-mid);
}

.price-or {
  font-size: 0.8rem;
  color: var(--gray-light);
  text-align: center;
  margin: 6px 0;
}

.price-main {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--black);
  line-height: 1;
}

.price-cents {
  font-size: 1.2rem;
}

.price-sub {
  font-size: 0.8rem;
  color: var(--gray-light);
  margin-top: 4px;
}

.price-features {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.price-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--gray-dark);
}

.price-features li i {
  color: var(--terracota);
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* Compare Table */
.compare-table-wrap {
  background: var(--cream);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  border: 1px solid rgba(26,20,16,0.08);
  overflow-x: auto;
}

.compare-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--black);
  margin-bottom: 20px;
}

.compare-table {
  min-width: 560px;
}

.compare-header {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.5fr 1.2fr 1fr;
  gap: 12px;
  padding: 10px 16px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-mid);
  border-bottom: 2px solid rgba(26,20,16,0.08);
  margin-bottom: 8px;
}

.compare-row {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.5fr 1.2fr 1fr;
  gap: 12px;
  padding: 12px 16px;
  align-items: center;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.compare-row:hover {
  background: rgba(26,20,16,0.03);
}

.compare-row.highlight-row {
  background: rgba(192, 80, 58, 0.05);
  border: 1px solid rgba(192, 80, 58, 0.15);
}

.compare-row [role="cell"] {
  font-size: 0.88rem;
  color: var(--gray-dark);
}

.format-chip {
  background: var(--white);
  border: 1px solid rgba(26,20,16,0.1);
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
}

.table-btn {
  display: inline-flex;
  align-items: center;
  background: var(--terracota);
  color: white;
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}

.table-btn:hover {
  background: var(--terracota-dark);
}

/* ===========================
   IDIOMAS
   =========================== */
.idiomas {
  padding: 80px 0;
  background: var(--cream);
}

.lang-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.lang-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 18px;
  border: 2px solid rgba(26,20,16,0.06);
  transition: all var(--transition);
}

.lang-card:hover {
  border-color: rgba(192, 80, 58, 0.3);
  box-shadow: var(--shadow-sm);
}

.lang-card.active-lang {
  border-color: var(--terracota);
  background: rgba(192, 80, 58, 0.03);
}

.lang-flag {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.lang-info {
  flex: 1;
}

.lang-info h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 4px;
}

.lang-title-book {
  font-size: 0.88rem;
  color: var(--gray-dark);
  font-weight: 500;
  line-height: 1.3;
}

.lang-subtitle-book {
  font-size: 0.78rem;
  color: var(--gray-light);
  font-style: italic;
  margin-top: 2px;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  background: var(--cream);
  color: var(--terracota);
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid rgba(192, 80, 58, 0.25);
  transition: all var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.lang-btn:hover {
  background: var(--terracota);
  color: white;
  border-color: var(--terracota);
}

.lang-btn.active-btn {
  background: var(--terracota);
  color: white;
  border-color: var(--terracota);
}

/* ===========================
   AUTOR
   =========================== */
.autor {
  padding: 80px 0;
  background: var(--white);
}

.autor-grid {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.autor-image-wrap {
  position: relative;
  text-align: center;
}

.autor-books-img {
  width: 100%;
  max-width: 480px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  margin: 0 auto;
  object-fit: cover;
}

.autor-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.autor-name {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--black);
  line-height: 1.2;
}

.autor-credentials {
  font-size: 0.88rem;
  color: var(--terracota);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.autor-bio {
  font-size: 0.95rem;
  color: var(--gray-mid);
  line-height: 1.75;
}

.autor-stats {
  display: flex;
  gap: 28px;
  padding: 20px 0;
  border-top: 1px solid rgba(26,20,16,0.08);
  border-bottom: 1px solid rgba(26,20,16,0.08);
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--terracota);
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--gray-mid);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ===========================
   CTA FINAL
   =========================== */
.cta-final {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--terracota-dark) 0%, var(--terracota) 50%, var(--terracota-light) 100%);
  position: relative;
  overflow: hidden;
}

.cta-final::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(255,255,255,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.cta-final-inner {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  position: relative;
}

.cta-final-inner h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  color: white;
  line-height: 1.2;
  margin-bottom: 16px;
}

.cta-final-inner p {
  color: rgba(255,255,255,0.85);
  font-size: 1.05rem;
  margin-bottom: 36px;
  line-height: 1.7;
}

.cta-final-btns {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
  margin-bottom: 20px;
}

.cta-final .btn-primary {
  background: white;
  color: var(--terracota) !important;
}

.cta-final .btn-primary:hover {
  background: var(--cream);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.cta-note {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* ===========================
   FOOTER
   =========================== */
.footer {
  background: var(--black);
  color: rgba(255,255,255,0.75);
  padding: 56px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-book-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: white;
  margin-bottom: 4px;
}

.footer-author {
  font-size: 0.85rem;
  color: var(--terracota-light);
  font-weight: 600;
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 0.875rem;
  line-height: 1.65;
  color: rgba(255,255,255,0.55);
}

.footer-links h4,
.footer-idiomas h4 {
  color: white;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.footer-links ul,
.footer-idiomas ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a,
.footer-idiomas a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}

.footer-links a:hover,
.footer-idiomas a:hover {
  color: var(--terracota-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-bottom p {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.35);
}

.footer-disclaimer {
  font-style: italic;
}

/* ===========================
   RESPONSIVE — TABLET (640px+)
   =========================== */
@media (min-width: 640px) {
  .hero-cta-group {
    flex-direction: row;
    justify-content: center;
  }

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

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

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

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .cta-final-btns {
    flex-direction: row;
    justify-content: center;
  }
}

/* ===========================
   RESPONSIVE — DESKTOP (1024px+)
   =========================== */
@media (min-width: 1024px) {
  .nav-links {
    display: flex;
  }

  .nav-toggle {
    display: none;
  }

  .nav-mobile {
    display: none !important;
  }

  .hero-container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    gap: 60px;
    padding: 80px 40px 100px;
  }

  .hero-content {
    text-align: left;
    max-width: 580px;
  }

  .hero-badges-row {
    justify-content: flex-start;
  }

  .hero-cta-group {
    justify-content: flex-start;
  }

  .hero-badge {
    margin-bottom: 32px;
  }

  .book-cover {
    width: 300px;
  }

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

  .cards-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .lang-cards {
    grid-template-columns: repeat(4, 1fr);
  }

  .lang-card {
    flex-direction: column;
    text-align: center;
    padding: 28px 20px;
  }

  .lang-btn {
    width: 100%;
    justify-content: center;
  }

  .autor-grid {
    flex-direction: row;
    align-items: center;
    gap: 60px;
  }

  .autor-image-wrap {
    flex: 1;
  }

  .autor-content {
    flex: 1;
  }
}

/* ===========================
   ACCESSIBILITY
   =========================== */
:focus-visible {
  outline: 3px solid var(--terracota);
  outline-offset: 3px;
  border-radius: 4px;
}

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

/* ===========================
   SCROLL ANIMATIONS
   =========================== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}