:root{
  --bg:#0b0c10;
  --line: rgba(255,255,255,.12);
  --text:#eaf0ff;
  --muted:#b6c0d6;
  --accent:#00d6ff;
  --shadow: 0 24px 80px rgba(0,0,0,.45);
  --radius:18px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--text);
  background:
    radial-gradient(900px 500px at 20% -10%, rgba(0,214,255,.20), transparent 60%),
    radial-gradient(900px 500px at 90% 10%, rgba(255,0,120,.12), transparent 55%),
    linear-gradient(180deg, #07080c, var(--bg));
  line-height:1.55;
}

a{color:inherit;text-decoration:none}
.container{width:min(1120px, 92vw); margin:0 auto}

.header{
  position:sticky; top:0; z-index:50;
  backdrop-filter: blur(10px);
  background: rgba(7,8,12,.55);
  border-bottom: 1px solid var(--line);
}
.header__inner{display:flex; align-items:center; justify-content:space-between; padding:14px 0; gap:16px}

.brand{display:flex; align-items:center; gap:10px; font-weight:800}
.brand__mark{
  width:30px;height:30px;border-radius:10px;
  background: linear-gradient(135deg, rgba(0,214,255,.9), rgba(255,0,120,.55));
  box-shadow: 0 0 30px rgba(0,214,255,.22);
}
.brand__name{letter-spacing:.3px;text-transform:lowercase}

.nav{display:none; gap:18px}
.nav a{color:var(--muted); font-weight:700}
.nav a:hover{color:var(--text)}

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:10px 14px; border-radius:999px; border:1px solid var(--line);
  font-weight:800;
  background: rgba(255,255,255,.04);
}
.btn:hover{background: rgba(255,255,255,.07)}
.btn--ghost{background: rgba(255,255,255,.03)}
.btn--primary{
  background: rgba(0,214,255,.14);
  border-color: rgba(0,214,255,.35);
}
.btn--primary:hover{background: rgba(0,214,255,.20)}

.hero{padding:52px 0 18px}
.hero__grid{
  display:grid;
  grid-template-columns: 1fr;
  gap:26px;
  align-items:start;
}
.eyebrow{
  color: rgba(0,214,255,.95);
  font-weight:800;
  letter-spacing:.2px;
  margin:0 0 10px;
  text-transform:uppercase;
  font-size:12px;
}
.hero__copy h1{
  font-size: clamp(30px, 4.2vw, 52px);
  line-height:1.05;
  margin:0 0 14px;
  letter-spacing:-.8px;
}
.lead{color:var(--muted); font-size: clamp(16px, 1.5vw, 18px); margin:0 0 18px}
.lead strong{color:var(--text)}

.hero__cta{
  display:flex;
  align-items:center;
  gap:18px;
  padding:16px;
  border-radius: var(--radius);
  border:1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  box-shadow: 0 18px 70px rgba(0,0,0,.30);
}

.img-btn{
  display:inline-block;
  border-radius: 50%;
  transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
  flex: 0 0 auto;
}
.img-btn img{
  display:block;
  width: 220px;
  max-width: 44vw;
  height:auto;
}
.img-btn:hover{
  transform: translateY(-2px) scale(1.045);
  filter: saturate(1.06);
  box-shadow: 0 22px 60px rgba(0,0,0,.35);
}
.img-btn:active{transform: scale(.97)}

.cta__title{font-weight:900; margin-bottom:6px}
.cta__sub{color:var(--muted); font-size:14px}
.cta__links{margin-top:8px; color:var(--muted); font-size:14px}
.link{color: rgba(0,214,255,.95); font-weight:800}
.link:hover{text-decoration:underline}
.sep{margin:0 8px; color: rgba(255,255,255,.25)}

.trust{margin-top:14px; display:grid; gap:8px}
.trust__item{display:flex; gap:10px; align-items:flex-start; color:var(--muted); font-weight:600}
.dot{width:8px;height:8px;border-radius:999px;background: rgba(0,214,255,.9); margin-top:7px; flex: 0 0 auto}

.hero__visual{display:flex; justify-content:center}
.bookCard{
  width:min(420px, 88vw);
  border-radius: 22px;
  padding: 18px 18px 14px;
  border:1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  box-shadow: var(--shadow);
}
.bookCard img{width:100%; height:auto; display:block}
.bookCard__caption{margin-top:10px}
.bookCard__title{font-weight:900}
.bookCard__subtitle{color:var(--muted); font-size:13px; margin-top:6px}

.section{padding:40px 0}
.section--alt{
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,0));
}
.section h2{margin:0 0 16px; letter-spacing:-.3px; font-size: clamp(20px, 2.2vw, 30px)}

.grid3{
  display:grid;
  grid-template-columns: 1fr;
  gap:14px;
}
.grid2{
  display:grid;
  grid-template-columns: 1fr;
  gap:14px;
}
.card{
  background: rgba(255,255,255,.06);
  border:1px solid var(--line);
  border-radius: var(--radius);
  padding:18px;
}
.card h3{margin:0 0 6px}
.card p{margin:0; color:var(--muted)}

.steps{display:grid; gap:12px}
.step{display:flex; gap:12px; align-items:flex-start}
.step__n{
  width:34px;height:34px;border-radius:12px;
  background: rgba(0,214,255,.12);
  border:1px solid rgba(0,214,255,.28);
  display:flex;align-items:center;justify-content:center;
  font-weight:900;
}
.step__t{color:var(--muted)}
.step__t strong{color:var(--text)}

.center{display:flex; justify-content:center; margin-top:18px}

.callout{
  border:1px solid rgba(0,214,255,.28);
  background: rgba(0,214,255,.08);
  border-radius: var(--radius);
  padding:16px;
  margin-bottom:14px;
}
.callout__title{font-weight:900; margin-bottom:6px}
.callout p{margin:0; color:var(--muted)}
.callout strong{color:var(--text)}

.note{
  margin-top:14px;
  color:var(--muted);
  border-left: 3px solid rgba(0,214,255,.75);
  padding-left: 12px;
}

.mentions{display:grid; gap:8px; color:var(--muted)}
.mentions strong{color:var(--text)}

.footer{
  padding:26px 0;
  border-top:1px solid var(--line);
  background: rgba(7,8,12,.60);
}
.footer__inner{display:flex; gap:16px; align-items:flex-start; justify-content:space-between; flex-wrap:wrap}
.footer__brand{font-weight:900}
.footer__muted{color:var(--muted); font-size:13px; margin-top:6px}
.footer__link{color:var(--muted); font-weight:800; margin-left:14px}
.footer__link:hover{color:var(--text)}

@media (min-width: 900px){
  .nav{display:flex}
  .hero__grid{grid-template-columns: 1.15fr .85fr; gap:28px}
  .grid3{grid-template-columns: repeat(3, 1fr)}
  .grid2{grid-template-columns: repeat(2, 1fr)}
}