/* ═══════════════════════════════════════════
   VARIÁVEIS & RESET
════════════════════════════════════════════ */
:root {
  --bg-0:        #0a0a0a;
  --bg-1:        #111111;
  --bg-2:        #181818;
  --bg-card:     #1e1e1e;
  --border:      #2a2a2a;

  --gold:        #c9a84c;
  --gold-light:  #e2c06a;
  --gold-dark:   #a8893a;
  --gold-glow:   rgba(201, 168, 76, 0.15);

  --text-1:      #f2f2f2;
  --text-2:      #b0b0b0;
  --text-3:      #6a6a6a;

  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;

  --shadow-card: 0 4px 32px rgba(0, 0, 0, 0.5);
  --shadow-gold: 0 0 40px rgba(201, 168, 76, 0.12);

  --transition:  0.3s ease;
  --font-serif:  'Playfair Display', Georgia, serif;
  --font-sans:   'Inter', system-ui, sans-serif;
}

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

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

body {
  background-color: var(--bg-0);
  color: var(--text-1);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

strong { font-weight: 600; color: var(--text-1); }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ═══════════════════════════════════════════
   UTILITÁRIOS
════════════════════════════════════════════ */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.gold { color: var(--gold); }

.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid var(--gold-dark);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-1);
}

/* ═══════════════════════════════════════════
   SCROLL REVEAL
════════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

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

/* ═══════════════════════════════════════════
   BOTÕES
════════════════════════════════════════════ */
.btn-primary {
  display: inline-block;
  background: var(--gold);
  color: #0a0a0a;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 16px 36px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform 0.2s ease, box-shadow var(--transition);
  text-align: center;
  letter-spacing: 0.02em;
}

.btn-primary:hover {
  background: var(--gold-light);
  color: #0a0a0a;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201, 168, 76, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-submit {
  width: 100%;
  background: var(--gold);
  color: #0a0a0a;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  padding: 17px 24px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform 0.2s ease, box-shadow var(--transition);
  letter-spacing: 0.02em;
}

.btn-submit:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201, 168, 76, 0.35);
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ═══════════════════════════════════════════
   HERO
════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  background: var(--bg-0);
  display: flex;
  align-items: center;
  padding: 80px 0 100px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 50%, rgba(201, 168, 76, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 80% 50%, rgba(201, 168, 76, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}

/* Hero — texto */
.hero-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid var(--gold-dark);
  padding: 5px 14px;
  border-radius: 100px;
  animation: fadeDown 0.6s ease both;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.18;
  color: var(--text-1);
  animation: fadeDown 0.7s 0.1s ease both;
}

.hero-title em {
  font-style: italic;
  font-weight: 700;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-2);
  line-height: 1.75;
  max-width: 500px;
  animation: fadeDown 0.7s 0.2s ease both;
}

.hero-text .btn-primary {
  animation: fadeDown 0.7s 0.3s ease both;
}

/* Hero — formulário */
.hero-form-wrapper {
  animation: fadeUp 0.8s 0.2s ease both;
}

.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-card), var(--shadow-gold);
}

.form-eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 8px;
}

.form-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 28px;
  line-height: 1.3;
}

.lead-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.lead-form input {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-1);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  padding: 14px 18px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  width: 100%;
}

.lead-form input::placeholder {
  color: var(--text-3);
}

.lead-form input:focus {
  border-color: var(--gold-dark);
  background: var(--bg-card);
  box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.1);
}

.lead-form input.invalid {
  border-color: #c0392b;
  box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.1);
}

.field-error {
  font-size: 0.8rem;
  color: #e07070;
  min-height: 18px;
  padding-left: 2px;
}

.btn-submit {
  margin-top: 8px;
}

.form-note {
  font-size: 0.75rem;
  color: var(--text-3);
  text-align: center;
  margin-top: 14px;
}

/* Mensagem de sucesso */
.success-message {
  text-align: center;
  padding: 32px 16px;
  animation: fadeUp 0.5s ease;
}

.success-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gold);
  color: #0a0a0a;
  font-size: 1.6rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  animation: popIn 0.4s ease;
}

.success-message h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--text-1);
  margin-bottom: 10px;
}

.success-message p {
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ═══════════════════════════════════════════
   SOBRE O LIVRO
════════════════════════════════════════════ */
.section-about {
  background: var(--bg-1);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-text p {
  color: var(--text-2);
  font-size: 1.05rem;
  line-height: 1.8;
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--text-2);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.highlight-item:hover {
  border-color: var(--gold-dark);
  box-shadow: var(--shadow-gold);
}

.highlight-num {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  min-width: 36px;
}

/* ═══════════════════════════════════════════
   PARA QUEM É
════════════════════════════════════════════ */
.section-who {
  background: var(--bg-0);
}

.who-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.who-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.who-card:hover {
  border-color: var(--gold-dark);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), var(--shadow-gold);
}

.who-icon {
  font-size: 1.8rem;
  margin-bottom: 16px;
}

.who-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 10px;
  line-height: 1.3;
}

.who-card p {
  font-size: 0.9rem;
  color: var(--text-2);
  line-height: 1.65;
}

/* ═══════════════════════════════════════════
   O QUE APRENDER
════════════════════════════════════════════ */
.section-learn {
  background: var(--bg-1);
}

.learn-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.learn-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 36px 32px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  transition: background var(--transition);
}

.learn-item:hover {
  background: var(--bg-2);
}

.learn-item:nth-child(even) {
  border-right: none;
}

.learn-item:nth-last-child(-n+2) {
  border-bottom: none;
}

.learn-dot {
  width: 10px;
  height: 10px;
  min-width: 10px;
  border-radius: 50%;
  background: var(--gold);
  margin-top: 7px;
  box-shadow: 0 0 8px rgba(201, 168, 76, 0.5);
}

.learn-body h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 8px;
  line-height: 1.35;
}

.learn-body p {
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.65;
}

/* ═══════════════════════════════════════════
   AUTOR
════════════════════════════════════════════ */
.section-author {
  background: var(--bg-0);
}

.author-wrapper {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 56px 56px;
  box-shadow: var(--shadow-card);
}

.author-photo img {
  width: 100%;
  border-radius: var(--radius-md);
  object-fit: cover;
  aspect-ratio: 3/4;
  border: 1px solid var(--border);
}

.author-placeholder {
  width: 100%;
  aspect-ratio: 3/4;
  background: var(--bg-2);
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  font-size: 0.85rem;
  text-align: center;
  line-height: 1.6;
}

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

.author-content .section-tag {
  align-self: flex-start;
}

.author-name {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--text-1);
  line-height: 1.2;
  margin-top: -4px;
}

.author-role {
  font-size: 0.9rem;
  color: var(--gold);
  font-weight: 500;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.author-content p {
  color: var(--text-2);
  font-size: 1rem;
  line-height: 1.8;
}

.author-social {
  display: flex;
  gap: 16px;
  margin-top: 8px;
}

.author-social a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-2);
  border: 1px solid var(--border);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), color var(--transition);
}

.author-social a:hover {
  color: var(--gold);
  border-color: var(--gold-dark);
}

/* ═══════════════════════════════════════════
   CTA FINAL
════════════════════════════════════════════ */
.section-cta {
  background: var(--bg-1);
  padding: 120px 0;
}

.cta-box {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.cta-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 700;
  color: var(--text-1);
  line-height: 1.22;
}

.cta-sub {
  color: var(--text-2);
  font-size: 1rem;
  line-height: 1.75;
  max-width: 480px;
}

.cta-note {
  font-size: 0.78rem;
  color: var(--text-3);
  margin-top: -4px;
}

/* ═══════════════════════════════════════════
   FOOTER
════════════════════════════════════════════ */
.footer {
  background: var(--bg-0);
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
}

.footer p {
  font-size: 0.82rem;
  color: var(--text-3);
}

/* ═══════════════════════════════════════════
   ANIMAÇÕES KEYFRAMES
════════════════════════════════════════════ */
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes popIn {
  from { opacity: 0; transform: scale(0.6); }
  to   { opacity: 1; transform: scale(1); }
}

/* ═══════════════════════════════════════════
   RESPONSIVO — TABLET (≤ 900px)
════════════════════════════════════════════ */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }

  .hero {
    padding: 72px 0 80px;
    min-height: auto;
  }

  .hero-text {
    align-items: center;
  }

  .hero-subtitle {
    max-width: 100%;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

  .learn-item:nth-child(even) {
    border-right: 1px solid var(--border);
  }

  .learn-item {
    border-right: none !important;
  }

  .learn-item:last-child {
    border-bottom: none;
  }

  .author-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 40px 32px;
    text-align: center;
  }

  .author-photo {
    max-width: 220px;
    margin: 0 auto;
  }

  .author-placeholder {
    max-width: 220px;
    margin: 0 auto;
  }

  .author-content {
    align-items: center;
  }

  .author-social {
    justify-content: center;
  }
}

/* ═══════════════════════════════════════════
   RESPONSIVO — MOBILE (≤ 560px)
════════════════════════════════════════════ */
@media (max-width: 560px) {
  .section {
    padding: 72px 0;
  }

  .section-header {
    margin-bottom: 44px;
  }

  .form-card {
    padding: 28px 22px;
  }

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

  .learn-item {
    padding: 28px 22px;
  }

  .author-wrapper {
    padding: 32px 20px;
  }

  .section-cta {
    padding: 80px 0;
  }

  .cta-box {
    gap: 16px;
  }

  .highlight-item {
    padding: 16px 18px;
  }
}