:root{
  --ink:#f5f5f7;
  --dim:#86868b;
  --line:rgba(255,255,255,.10);
  --bg:#000;
  --acc:#2997ff;
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Helvetica Neue",Inter,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}

/* ---------------------------------------------------------------- nav */
.nav{
  position:fixed;inset:0 0 auto 0;z-index:40;height:48px;
  background:rgba(0,0,0,.55);backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--line);
}
.nav-in{max-width:1040px;margin:0 auto;height:100%;padding:0 22px;display:flex;align-items:center;gap:32px}
.nav-brand{font-weight:600;font-size:19px;letter-spacing:-.02em}
.nav nav{display:flex;gap:26px}
.nav nav a{font-size:12.5px;color:#d2d2d7;opacity:.85;transition:opacity .2s}
.nav nav a:hover{opacity:1}

/* ---------------------------------------------------------------- loader */
#loader{position:fixed;inset:0;z-index:60;background:#000;display:grid;place-items:center;
  transition:opacity .7s ease,visibility .7s}
#loader.done{opacity:0;visibility:hidden}
.loader-in{display:flex;flex-direction:column;align-items:center;gap:14px}
.loader-bar{display:block;width:160px;height:2px;background:rgba(255,255,255,.14);overflow:hidden;border-radius:2px}
.loader-bar i{display:block;height:100%;width:0;background:var(--ink);transition:width .35s ease}
.loader-txt{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim)}

/* ---------------------------------------------------------------- acto 3D */
#track{position:relative;height:760vh}
#stage{
  position:sticky;top:0;height:100vh;height:100svh;overflow:hidden;
  background:
    radial-gradient(115% 75% at 50% 6%,rgba(38,44,54,.95) 0%,rgba(10,12,16,.85) 45%,rgba(0,0,0,0) 80%),
    radial-gradient(80% 42% at 50% 97%,#161a20 0%,rgba(0,0,0,0) 72%),
    #000;
}
#gl{position:absolute;inset:0;width:100%;height:100%;display:block}

/* velo para que el texto siempre se lea sobre la pieza */
#stage::after{
  content:"";position:absolute;inset:0 0 auto 0;height:52%;pointer-events:none;
  background:linear-gradient(180deg,rgba(0,0,0,.72) 0%,rgba(0,0,0,.55) 34%,rgba(0,0,0,0) 100%);
}
.caps{position:absolute;inset:0;pointer-events:none;z-index:3}
.cap{
  position:absolute;left:0;right:0;top:clamp(72px,12vh,140px);
  padding:0 26px;text-align:center;opacity:0;will-change:opacity,transform;
}
.cap-n{
  display:inline-block;font-size:11px;letter-spacing:.22em;color:var(--dim);
  margin-bottom:14px;font-weight:590;
}
.cap h2{
  margin:0;font-size:clamp(30px,4.6vw,58px);line-height:1.05;letter-spacing:-.025em;font-weight:600;
}
.cap h2.big{font-size:clamp(34px,6vw,76px)}
.cap p{
  margin:14px auto 0;max-width:34ch;font-size:clamp(14px,1.35vw,19px);line-height:1.45;
  color:#c7c7cc;font-weight:400;
}
.hero-title{
  margin:0;font-size:clamp(76px,17vw,210px);line-height:.9;letter-spacing:-.055em;font-weight:600;
  background:linear-gradient(180deg,#fff 12%,#9aa0a8 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{margin:18px auto 0;max-width:26ch;font-size:clamp(15px,1.5vw,21px);color:#c7c7cc}

.steps{
  position:absolute;right:26px;top:50%;transform:translateY(-50%);
  list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px;
}
.steps li{width:5px;height:5px;border-radius:50%;background:rgba(255,255,255,.22);transition:background .35s,transform .35s}
.steps li.on{background:var(--ink);transform:scale(1.5)}

.hint{
  position:absolute;left:0;right:0;bottom:34px;display:flex;flex-direction:column;
  align-items:center;gap:9px;color:var(--dim);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;transition:opacity .4s;
}
.hint i{display:block;width:1px;height:26px;background:linear-gradient(180deg,var(--dim),transparent);animation:fall 1.9s ease-in-out infinite}
@keyframes fall{0%{opacity:0;transform:translateY(-8px)}40%{opacity:1}100%{opacity:0;transform:translateY(8px)}}

/* ---------------------------------------------------------------- bandas */
main{position:relative;z-index:2;background:#000}
.band{max-width:1040px;margin:0 auto;padding:clamp(90px,13vh,170px) 26px}
.band-tight{padding-top:0}
.eyebrow{margin:0 0 16px;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--acc);font-weight:590}
.band-title{margin:0;font-size:clamp(34px,5.4vw,68px);line-height:1.06;letter-spacing:-.03em;font-weight:600}
.band-title.small{font-size:clamp(28px,3.6vw,44px)}
.dim{color:var(--dim)}
.band-lead{margin:26px 0 0;max-width:56ch;font-size:clamp(16px,1.5vw,20px);line-height:1.5;color:#c7c7cc}
.band-lead.left{max-width:44ch}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(255px,1fr));gap:18px;margin-top:56px}
.card{
  padding:30px 26px;border-radius:20px;border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.015));
}
.card h3{margin:0 0 12px;font-size:19px;letter-spacing:-.015em;font-weight:600}
.card p{margin:0;font-size:14.5px;line-height:1.55;color:#a1a1a6}

.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;max-width:1040px;margin:0 auto;padding:clamp(70px,10vh,130px) 0}
.shot{margin:0}
.shot img{width:100%;height:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
.shot figcaption{margin-top:12px;font-size:12.5px;color:var(--dim)}

.specs{margin-top:46px;border-top:1px solid var(--line)}
.spec{display:grid;grid-template-columns:minmax(150px,26%) 1fr;gap:22px;padding:18px 2px;border-bottom:1px solid var(--line)}
.spec dt{margin:0;font-size:13px;color:var(--dim)}
.spec dd{margin:0;font-size:15.5px;letter-spacing:-.005em}
.note{margin-top:22px;font-size:12.5px;line-height:1.5;color:#6e6e73;max-width:60ch}

.dl{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:12px;margin-top:46px}
.dlitem{
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:14px;
  padding:17px 20px;border-radius:14px;border:1px solid var(--line);
  background:rgba(255,255,255,.03);transition:background .2s,border-color .2s,transform .2s;
}
.dlitem:hover{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.2);transform:translateY(-1px)}
.dlk{font-size:10.5px;letter-spacing:.12em;color:var(--acc);font-weight:640;min-width:42px}
.dln{font-size:14.5px}
.dls{font-size:12px;color:var(--dim);font-variant-numeric:tabular-nums}

footer{border-top:1px solid var(--line);padding:44px 26px 70px;text-align:center}
footer p{margin:0 auto;max-width:60ch;font-size:12.5px;line-height:1.6;color:#6e6e73}
footer .dimmer{margin-top:8px;color:#4e4e53}

@media (max-width:760px){
  .split{grid-template-columns:1fr;gap:32px}
  .steps{right:14px}
  .spec{grid-template-columns:1fr;gap:5px}
  .nav nav{gap:18px}
  #track{height:660vh}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .hint i{animation:none}
}