/* Design tokens */
:root{
  --bg-0:#0b0d10;
  --bg-1:#111419;
  --surface:#171b21;
  --text-0:#e8edf2;
  --text-1:#c7d0da;
  --muted:#98a4b3;
  --brand:#6ae3ff;
  --brand-600:#29c7ea;
  --brand-700:#14a9cd;
  --accent:#a78bfa;
  --border:#243140;
  --shadow:0 10px 25px rgba(0,0,0,.35);
  --radius:14px;
}

/* Reset */
*,*::before,*::after{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: 'Manrope', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color:var(--text-0);
  background:linear-gradient(180deg, var(--bg-0), var(--bg-1));
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* Typography */
.h1{font-size:clamp(2rem,4vw,3rem);line-height:1.1;margin:0}
.h2{font-size:clamp(1.5rem,2.5vw,2rem);line-height:1.2;margin:0 0 1rem}
.h3{font-size:1.25rem;margin:0 0 .5rem}
.h4{font-size:1.1rem;margin:0 0 .5rem}
.lead{font-size:1.25rem;color:var(--text-0);margin:.25rem 0 0}
.sublead{color:var(--text-1)}
.tiny{font-size:.8rem;color:var(--muted)}
.muted{color:var(--muted)}

/* Layout */
.container{max-width:1120px;margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section.alt{background:linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.00))}
.grid-2{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.stack{display:flex;flex-direction:column}
.gap-m{gap:12px}
.gap-l{gap:18px}
.center{text-align:center}
.mt-l{margin-top:24px}
/* Anchor offset for sticky header */
.section{scroll-margin-top:84px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,13,16,.6);backdrop-filter:saturate(150%) blur(10px);border-bottom:1px solid rgba(255,255,255,.05)}
.header-inner{display:flex;align-items:center;gap:16px;min-height:64px}
.logo{font-weight:700;letter-spacing:.2px}
.nav{margin-left:auto;display:flex;gap:18px}
.nav-link{color:var(--text-1)}
.nav-link:hover{color:var(--text-0);text-decoration:underline;text-underline-offset:4px}
.nav-link:focus-visible,.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid transparent;padding:10px 16px;border-radius:999px;cursor:pointer;transition:transform .04s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:linear-gradient(180deg, var(--brand), var(--brand-600));color:#04151f;box-shadow:0 8px 18px rgba(106,227,255,.24)}
.btn-primary:hover{background:linear-gradient(180deg, var(--brand), var(--brand-700))}
.btn-secondary{background:#1a212a;border-color:#2a394b;color:var(--text-0)}
.btn-lg{padding:14px 22px;font-weight:600}
.btn-xl{padding:16px 26px;font-size:1.15rem;font-weight:700}
.btn-block{display:flex;width:100%}

.menu-toggle{display:none;margin-left:8px;background:transparent;border:0;padding:8px}
.menu-toggle .bar{display:block;width:22px;height:2px;background:var(--text-0);margin:4px 0;border-radius:2px}
.mobile-nav{display:none;flex-direction:column;gap:12px;padding:12px 24px;background:rgba(0,0,0,.7);border-bottom:1px solid rgba(255,255,255,.06)}
.mobile-nav[hidden]{display:none}

/* Hero */
.hero{padding:96px 0}
.kicker{display:inline-block;padding:6px 10px;border:1px solid #2a394b;border-radius:999px;color:var(--text-1);font-weight:600;font-size:.85rem;letter-spacing:.2px}
.actions{display:flex;gap:12px;flex-wrap:wrap}
.guarantee{color:var(--text-1)}
.disclaimer{color:var(--muted);font-size:.95rem}
.hero-side{align-self:stretch}
.product-img{border-radius:16px;border:1px solid var(--border);box-shadow:var(--shadow);width:100%;height:auto;object-fit:cover;background:#0f1620}

/* Cards */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.card.highlight{border-color:#2f4055}
.card-body{padding:20px}

/* Checklist */
.checklist{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.checklist li{position:relative;padding-left:28px}
.checklist li::before{content:"";position:absolute;left:0;top:.45em;width:18px;height:18px;border-radius:50%;background:conic-gradient(from 180deg at 50% 50%, var(--brand), var(--accent));box-shadow:0 4px 10px rgba(106,227,255,.35)}

/* Trust */
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;align-items:center}
.trust-item{padding:10px 12px;border:1px dashed rgba(255,255,255,.1);border-radius:999px;color:var(--text-1);text-align:center}

/* Quotes */
.quote{background:rgba(0,0,0,.2);border:1px solid rgba(255,255,255,.06);border-radius:var(--radius);padding:18px}
.quote .author{display:block;margin-top:8px;color:var(--muted);font-size:.95rem}

/* Pricing */
.price-card{display:inline-flex;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-top:12px}
.price-body{padding:24px 26px}

/* FAQ */
.faq{display:grid;gap:10px}
.faq-q{width:100%;text-align:left;background:#12171d;color:var(--text-0);border:1px solid #253244;border-radius:12px;padding:14px 16px;font-size:1rem;cursor:pointer}
.faq-q[aria-expanded="true"]{border-color:#355173;background:#16212b}
.faq-a{padding:12px 16px;background:#0f1419;border-left:2px solid #2a3b4e;border-radius:0 0 10px 10px}

/* Chapters preview */
.chapters{display:grid;gap:12px}
.chapter{background:#0f1419;border:1px solid #253244;border-radius:12px;overflow:hidden}
.chapter-title{cursor:pointer;display:block;padding:14px 16px;font-weight:700;color:var(--text-0)}
.chapter[open] .chapter-title{background:#12171d;border-bottom:1px solid #253244}
.chapter-body{padding:14px 16px;color:var(--text-1)}
.chapter-body ul{margin:0;padding-left:18px}
.chapter-body li{margin:6px 0}

/* Footer */
.site-footer{padding:32px 0;border-top:1px solid rgba(255,255,255,.06);background:rgba(0,0,0,.25)}
.footer-inner{display:flex;gap:12px;align-items:center;justify-content:space-between}
.footer-actions{display:flex;gap:12px;align-items:center}

/* Sticky header on scroll */
.site-header.scrolled{background:rgba(11,13,16,.8);border-bottom-color:rgba(255,255,255,.08)}

/* Responsive */
@media (max-width: 900px){
  .grid-2{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
  .hero{padding:72px 0}
}

@media (max-width: 720px){
  .nav{display:none}
  .menu-toggle{display:inline-block}
  .mobile-nav{display:flex;position:fixed;top:64px;left:0;right:0;bottom:0;overflow:auto;padding:16px 24px;background:rgba(8,10,13,.92);backdrop-filter:blur(6px)}
  .btn-lg,.btn-xl{width:100%}
}

@media (max-width: 480px){
  .section{padding:56px 0}
  .h1{font-size:clamp(1.75rem,7vw,2.3rem)}
  .lead{font-size:1.1rem}
  .container{padding:0 18px}
}