:root{
  --bg: #12151a;
  --panel: #1b1f26;
  --panel-2: #20252d;
  --line: #2a3038;
  --text: #edeff2;
  --text-muted: #8a93a3;
  --copper: #c9814b;
  --copper-soft: #e2a877;
  --teal: #4fd1c5;
  --radius: 3px;
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  background: var(--bg);
  color: var(--text);
  font-family: 'Space Grotesk', 'Segoe UI', Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
@font-face{
  font-family:'Space Grotesk';
  src: local('Space Grotesk');
}
.mono{
  font-family: 'IBM Plex Mono', 'Courier New', monospace;
}
a{color:inherit; text-decoration:none;}
img{max-width:100%; display:block;}

.wrap{
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- circuit line decoration ---------- */
.traces{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  pointer-events:none;
  opacity:0.5;
}
.traces path{
  fill:none;
  stroke: var(--line);
  stroke-width:1.5;
}
.traces circle{
  fill: var(--bg);
  stroke: var(--teal);
  stroke-width:1.5;
}

/* ---------- nav ---------- */
header{
  position: sticky; top:0; z-index:50;
  background: rgba(18,21,26,0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
nav.wrap{
  display:flex; align-items:center; justify-content:space-between;
  height: 68px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-weight:600; font-size:1.05rem; letter-spacing:0.2px;
}
.brand .chip{
  width:22px; height:22px;
  border:1.5px solid var(--copper);
  border-radius:2px;
  position:relative;
  flex-shrink:0;
}
.brand .chip::before, .brand .chip::after{
  content:"";
  position:absolute;
  background: var(--copper);
  width:4px; height:1.5px;
}
.brand .chip::before{ left:-4px; top:9px; }
.brand .chip::after{ right:-4px; top:9px; }
nav .links{ display:flex; gap:28px; font-size:0.92rem; color:var(--text-muted); }
nav .links a:hover{ color: var(--teal); }
.btn-nav{
  background: var(--copper);
  color:#141414;
  padding:9px 18px;
  border-radius: var(--radius);
  font-weight:600;
  font-size:0.88rem;
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding: 96px 0 80px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap:56px;
  align-items:center;
  position:relative;
  z-index:2;
}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  color: var(--teal);
  font-family:'IBM Plex Mono', monospace;
  font-size:0.78rem;
  margin-bottom:22px;
}
.eyebrow::before{
  content:"";
  width:16px; height:1px;
  background: var(--teal);
}
h1{
  font-size: 2.9rem;
  line-height:1.12;
  font-weight:700;
  letter-spacing:-0.5px;
  max-width: 620px;
}
.hero p.lead{
  margin-top:22px;
  font-size:1.08rem;
  color: var(--text-muted);
  max-width: 500px;
}
.hero-ctas{
  margin-top:34px;
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  align-items:center;
}
.btn-primary{
  background: var(--copper);
  color:#141414;
  padding:15px 26px;
  border-radius: var(--radius);
  font-weight:600;
  font-size:0.98rem;
  display:inline-flex;
  align-items:center;
  gap:10px;
  transition: background 0.15s ease;
}
.btn-primary:hover{ background: var(--copper-soft); }
.price-tag{
  font-family:'IBM Plex Mono', monospace;
  color:var(--text-muted);
  font-size:0.88rem;
}
.price-tag strong{
  color:var(--text);
  font-size:1.1rem;
}

.stat-row{
  display:flex;
  gap:36px;
  margin-top:48px;
  padding-top:28px;
  border-top:1px solid var(--line);
  max-width:520px;
}
.stat-row div strong{
  display:block;
  font-family:'IBM Plex Mono', monospace;
  font-size:1.5rem;
  color: var(--teal);
}
.stat-row div span{
  font-size:0.8rem;
  color:var(--text-muted);
}

/* ---------- book mockup / capa do produto ---------- */
.book-mock{
  position:relative;
  width: 100%;
  max-width: 340px;
  margin: 0 auto;
  aspect-ratio: 3/4;
  background: linear-gradient(155deg, var(--panel-2), var(--panel));
  border:1px solid var(--line);
  border-radius: 6px;
  overflow:hidden;
  box-shadow: -14px 14px 0 rgba(0,0,0,0.25);
}
.book-mock img.cover{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

/* ---------- section basics ---------- */
section{ padding: 84px 0; border-bottom:1px solid var(--line); }
.section-head{
  max-width: 560px;
  margin-bottom: 52px;
}
.section-head .eyebrow{ margin-bottom:14px; }
h2{
  font-size:2rem;
  font-weight:700;
  letter-spacing:-0.3px;
}
.section-head p{
  margin-top:14px;
  color: var(--text-muted);
  font-size:1rem;
}

/* ---------- chapters (what's inside) ---------- */
.chapters{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  border:1px solid var(--line);
  border-radius: var(--radius);
  overflow:hidden;
}
.chapter{
  padding: 26px 28px;
  border-right:1px solid var(--line);
  border-bottom:1px solid var(--line);
  position:relative;
}
.chapter:nth-child(2n){ border-right:none; }
.chapter .idx{
  font-family:'IBM Plex Mono', monospace;
  color: var(--copper);
  font-size:0.82rem;
}
.chapter h4{
  margin-top:10px;
  font-size:1.05rem;
  font-weight:600;
}
.chapter p{
  margin-top:8px;
  font-size:0.9rem;
  color: var(--text-muted);
}

/* ---------- audience ---------- */
.audience-grid{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap:1px;
  background: var(--line);
  border:1px solid var(--line);
}
.audience-item{
  background: var(--bg);
  padding: 30px 22px;
  font-size:0.92rem;
  color: var(--text-muted);
}
.audience-item strong{
  display:block;
  color: var(--text);
  font-size:1rem;
  margin-bottom:8px;
}

/* ---------- pricing / order ---------- */
.order-panel{
  background: var(--panel);
  border:1px solid var(--line);
  border-radius: 6px;
  display:grid;
  grid-template-columns: 1fr 1fr;
}
.order-left{
  padding: 44px 44px;
  border-right:1px solid var(--line);
}
.order-left .amount{
  font-family:'IBM Plex Mono', monospace;
  font-size:3rem;
  color: var(--teal);
  margin: 14px 0 6px;
}
.order-left .amount sup{ font-size:1.1rem; margin-right:4px; color:var(--text-muted); }
.order-left ul{ margin-top:26px; list-style:none; }
.order-left li{
  display:flex; gap:10px; align-items:flex-start;
  padding:10px 0;
  border-top:1px solid var(--line);
  font-size:0.92rem;
  color: var(--text-muted);
}
.order-left li::before{
  content:"›";
  color: var(--copper);
  font-family:'IBM Plex Mono', monospace;
}
.order-right{
  padding: 44px 44px;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.order-right h4{
  font-size:1.1rem;
  margin-bottom:18px;
}
.pay-methods{
  display:flex; gap:10px; margin-bottom:26px;
}
.pay-chip{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.78rem;
  border:1px solid var(--line);
  padding:6px 12px;
  border-radius: 20px;
  color: var(--text-muted);
}
.steps{ counter-reset: step; }
.steps li{
  counter-increment: step;
  position:relative;
  padding-left: 34px;
  padding-bottom:18px;
  font-size:0.92rem;
  color: var(--text-muted);
}
.steps li::before{
  content: counter(step);
  position:absolute; left:0; top:0;
  width:22px; height:22px;
  border:1px solid var(--copper);
  color: var(--copper);
  font-family:'IBM Plex Mono', monospace;
  font-size:0.75rem;
  display:flex; align-items:center; justify-content:center;
  border-radius: 50%;
}
.steps li strong{ color: var(--text); }

/* ---------- FAQ ---------- */
.faq-item{
  border-top:1px solid var(--line);
  padding: 22px 0;
}
.faq-item:last-child{ border-bottom:1px solid var(--line); }
.faq-q{
  display:flex; justify-content:space-between; align-items:center;
  cursor:pointer;
  font-weight:600;
  font-size:1rem;
}
.faq-q .plus{
  font-family:'IBM Plex Mono', monospace;
  color: var(--copper);
  transition: transform 0.15s ease;
}
.faq-item.open .plus{ transform: rotate(45deg); }
.faq-a{
  max-height:0;
  overflow:hidden;
  transition: max-height 0.2s ease;
  color: var(--text-muted);
  font-size:0.94rem;
}
.faq-item.open .faq-a{ max-height:200px; margin-top:12px; }

/* ---------- final cta ---------- */
.final-cta{
  text-align:center;
  padding: 90px 0;
}
.final-cta h2{ font-size:2.1rem; max-width:600px; margin:0 auto; }
.final-cta p{ color:var(--text-muted); margin-top:14px; }
.final-cta .btn-primary{ margin-top:30px; }

footer{
  padding: 40px 0;
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:16px;
  font-size:0.85rem;
  color: var(--text-muted);
}
footer .mono{ color: var(--text-muted); }

@media (max-width: 860px){
  .hero-grid{ grid-template-columns: 1fr; }
  h1{ font-size:2.2rem; }
  .chapters{ grid-template-columns: 1fr; }
  .chapter:nth-child(2n){ border-right:1px solid var(--line); }
  .audience-grid{ grid-template-columns: repeat(2, 1fr); }
  .order-panel{ grid-template-columns: 1fr; }
  .order-left{ border-right:none; border-bottom:1px solid var(--line); }
  nav .links{ display:none; }
  .stat-row{ flex-wrap:wrap; gap:24px; }
}