:root{
  --ink:#0a0c0e; --ink-2:#101418; --panel:#161b20;
  --pulse:#4ae3b5; --pulse-dim:rgba(74,227,181,.35); --white:#f2f6f5;
  --text:#f2f6f5; --text-2:#94a4a0; --text-3:#5b6a66; --line:#212a28;
  --display:'Space Grotesk',sans-serif; --sans:'Inter',system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html.lenis{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
body{
  font-family:var(--sans);background:var(--ink);color:var(--text);
  font-size:16px;line-height:1.65;font-weight:300;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
::selection{background:var(--pulse-dim)}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
.container{max-width:1160px;margin:0 auto;padding:0 24px}
h1,h2,h3{font-family:var(--display);font-weight:700;line-height:1.08;letter-spacing:-.02em}

/* nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .4s,border-color .4s;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(10,12,14,.9);backdrop-filter:blur(14px);border-color:var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{font-family:var(--display);font-weight:700;font-size:20px;letter-spacing:.02em;display:flex;align-items:center;gap:10px}
.brand .dot{width:12px;height:12px;border-radius:50%;background:var(--pulse);box-shadow:0 0 16px var(--pulse)}
.nav-links{display:flex;gap:36px}
.nav-links a{font-size:13.5px;font-weight:500;color:var(--text-2);transition:color .3s}
.nav-links a:hover,.nav-links a:focus-visible{color:var(--pulse)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;
  padding:15px 32px;border-radius:100px;font-weight:600;font-size:14.5px;transition:all .3s;
}
.btn:focus-visible{outline:2px solid var(--pulse);outline-offset:3px}
.btn-pulse{background:var(--pulse);color:#04241a}
.btn-pulse:hover{transform:translateY(-2px);box-shadow:0 14px 40px rgba(74,227,181,.4)}
.btn-line{border:1px solid rgba(242,246,245,.3);color:var(--white)}
.btn-line:hover{border-color:var(--pulse);color:var(--pulse)}
.menu-btn{display:none;width:44px;height:44px;align-items:center;justify-content:center}

/* hero */
.hero{position:relative;min-height:100vh;min-height:100dvh;display:flex;align-items:center;overflow:hidden;text-align:center}
.hero-glow{
  position:absolute;left:50%;top:56%;transform:translate(-50%,-50%);
  width:min(760px,90vw);aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle,rgba(74,227,181,.16),transparent 65%);filter:blur(30px);
}
.hero-in{position:relative;z-index:2;width:100%;padding-top:90px}
.hero-kicker{
  display:inline-flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:100px;
  background:var(--ink-2);padding:9px 20px;font-size:13px;font-weight:500;color:var(--text-2);margin-bottom:30px;
}
.hero-kicker b{color:var(--pulse);font-weight:600}
.hero h1{font-size:clamp(42px,7vw,92px);margin-bottom:22px}
.hero h1 .accent{color:var(--pulse)}
.hero p{color:var(--text-2);max-width:460px;margin:0 auto 40px;font-size:clamp(15.5px,1.7vw,18px)}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:40px}
.hero-case{width:min(460px,78vw);margin:0 auto;filter:drop-shadow(0 50px 90px rgba(0,0,0,.7));border-radius:36px;will-change:transform}
.scroll-cue{
  position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:3;
  font-size:11px;letter-spacing:.4em;text-transform:uppercase;color:var(--text-3);
}

/* ============ SCROLL STORY ============ */
.story{position:relative}
.stage{position:relative;overflow:hidden}
/* pinned mode (JS adds .is-pinned) */
.story.is-pinned .stage{height:100vh;height:100dvh}
.chapter{
  position:relative;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  max-width:1160px;margin:0 auto;padding:110px 24px;min-height:70vh;
}
.story.is-pinned .chapter{
  position:absolute;inset:0;padding:0 24px;min-height:0;height:100%;
  opacity:0;pointer-events:none;
}
.story.is-pinned .chapter.ch-1{opacity:1}
.ch-media{position:relative;display:flex;justify-content:center;align-items:center}
.ch-media img{width:min(420px,84%);border-radius:30px;box-shadow:0 50px 100px rgba(0,0,0,.65);will-change:transform}
.ch-num{
  font-family:var(--display);font-size:13px;font-weight:600;letter-spacing:.3em;color:var(--pulse);
  text-transform:uppercase;margin-bottom:18px;display:block;
}
.ch-text h2{font-size:clamp(28px,3.8vw,50px);margin-bottom:18px}
.ch-text p{color:var(--text-2);max-width:420px;font-size:15.5px}
.ch-text .stat{margin-top:26px;display:flex;gap:34px}
.ch-text .stat b{font-family:var(--display);font-size:30px;color:var(--pulse);display:block;font-variant-numeric:tabular-nums}
.ch-text .stat span{font-size:12.5px;color:var(--text-3);text-transform:uppercase;letter-spacing:.1em}
/* ANC rings */
.rings{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none}
.ring{
  position:absolute;border:1.5px solid var(--pulse-dim);border-radius:50%;
  width:60%;aspect-ratio:1;opacity:0;
}
/* progress rail */
.rail{
  position:absolute;right:26px;top:50%;transform:translateY(-50%);z-index:5;
  display:none;flex-direction:column;gap:14px;
}
.story.is-pinned .rail{display:flex}
.rail i{width:8px;height:8px;border-radius:50%;background:var(--line);transition:background .3s,transform .3s}
.rail i.on{background:var(--pulse);transform:scale(1.4);box-shadow:0 0 12px var(--pulse)}

/* specs strip */
.specs{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--ink-2)}
.specs-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.spec{padding:52px 24px;text-align:center;border-right:1px solid var(--line)}
.spec:last-child{border-right:none}
.spec b{font-family:var(--display);font-size:clamp(30px,3.6vw,46px);font-weight:700;display:block;font-variant-numeric:tabular-nums}
.spec b small{font-size:.42em;color:var(--pulse)}
.spec span{font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-3)}

/* features */
.section{padding:120px 0}
.kicker{font-family:var(--display);font-size:12.5px;font-weight:600;letter-spacing:.3em;text-transform:uppercase;color:var(--pulse);margin-bottom:20px;display:block}
.sec-h2{font-size:clamp(30px,4.4vw,54px);margin-bottom:20px}
.feats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:56px}
.feat{
  background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:36px 30px;
  transition:transform .3s,border-color .3s;
}
.feat:hover{transform:translateY(-6px);border-color:var(--pulse-dim)}
.feat .ic{width:50px;height:50px;border-radius:15px;background:rgba(74,227,181,.1);display:grid;place-items:center;margin-bottom:22px}
.feat .ic svg{width:24px;height:24px;stroke:var(--pulse)}
.feat h3{font-size:18px;margin-bottom:10px}
.feat p{font-size:14px;color:var(--text-2)}

/* cta */
.cta{position:relative;overflow:hidden;border-radius:32px;text-align:center;padding:clamp(48px,7vw,90px) 32px;background:linear-gradient(140deg,rgba(74,227,181,.14),rgba(74,227,181,.04));border:1px solid var(--pulse-dim)}
.cta h2{font-size:clamp(30px,4.4vw,54px);margin-bottom:16px}
.cta p{color:var(--text-2);max-width:420px;margin:0 auto 40px}
.cta .price{font-family:var(--display);font-size:22px;color:var(--pulse);margin-bottom:28px}
.cta .price s{color:var(--text-3);font-size:.75em;margin-right:12px}

/* footer */
footer{border-top:1px solid var(--line);padding:56px 0 42px}
.foot{display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap}
.foot-links{display:flex;gap:30px;flex-wrap:wrap}
.foot-links a{font-size:13.5px;color:var(--text-2)}
.foot-links a:hover{color:var(--pulse)}
.foot-bottom{margin-top:38px;font-size:12.5px;color:var(--text-3)}

@media (max-width:1020px){
  .chapter{grid-template-columns:1fr;gap:34px;text-align:center;padding:90px 24px}
  .ch-text p{margin:0 auto}
  .ch-text .stat{justify-content:center}
  .specs-grid{grid-template-columns:1fr 1fr}
  .spec:nth-child(2){border-right:none}
  .feats{grid-template-columns:1fr;max-width:460px;margin-left:auto;margin-right:auto;margin-top:56px}
  .rail{right:12px}
  .nav-links{display:none}
  .nav-links.open{
    display:flex;flex-direction:column;position:absolute;top:74px;left:0;right:0;
    background:rgba(10,12,14,.97);padding:26px 24px;gap:22px;border-bottom:1px solid var(--line);
  }
  .menu-btn{display:flex}
  .nav .btn{display:none}
}
@media (max-width:560px){
  .spec{border-right:none;border-bottom:1px solid var(--line)}
  .specs-grid{grid-template-columns:1fr 1fr}
  .section{padding:88px 0}
}

/* ---- cross-document View Transitions (progressive enhancement) ---- */
@media (prefers-reduced-motion:no-preference){
  @view-transition{navigation:auto}
  .hero{view-transition-name:page-hero}
  ::view-transition-old(page-hero),::view-transition-new(page-hero){
    animation-duration:.45s;animation-timing-function:cubic-bezier(.4,0,.2,1);
  }
  ::view-transition-old(root),::view-transition-new(root){animation-duration:.35s}
}