:root{
  --bg:#080a12;
  --bg-soft:#0d1120;
  --ink:#eef1f8;
  --ink-dim:#9aa3bd;
  --ink-faint:#5a6382;
  --wave:#3ee6c4;      /* verde-sonar */
  --wave-2:#7c8cff;    /* pulso azul */
  --line:rgba(255,255,255,.08);
  --display:'Sora',sans-serif;
  --body:'Space Grotesk',sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--body);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--wave);color:#04120e}

/* grain overlay */
.grain{
  position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.04;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode:overlay;
}

/* NAV */
#nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  transition:background .4s ease, backdrop-filter .4s ease, border-color .4s ease;
  border-bottom:1px solid transparent;
}
#nav.stuck{
  background:rgba(8,10,18,.72);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:1200px;margin:0 auto;padding:20px 32px;
  display:flex;align-items:center;justify-content:space-between;
}
.brand{
  font-family:var(--display);font-weight:800;font-size:1.15rem;
  letter-spacing:-.02em;color:var(--ink);text-decoration:none;
  display:flex;align-items:center;gap:12px;
}
.brand span{color:var(--wave)}
.brand-mark{
  width:14px;height:14px;border-radius:50%;
  background:var(--wave);
  box-shadow:0 0 0 4px rgba(62,230,196,.18),0 0 24px rgba(62,230,196,.5);
  animation:beat 2.6s ease-in-out infinite;
}
@keyframes beat{
  0%,100%{transform:scale(1);box-shadow:0 0 0 4px rgba(62,230,196,.18),0 0 24px rgba(62,230,196,.4)}
  50%{transform:scale(1.35);box-shadow:0 0 0 10px rgba(62,230,196,0),0 0 32px rgba(62,230,196,.7)}
}
.nav-links{display:flex;gap:34px}
.nav-links a{
  color:var(--ink-dim);text-decoration:none;font-size:.86rem;font-weight:500;
  letter-spacing:.01em;transition:color .25s;
}
.nav-links a:hover{color:var(--ink)}

/* HERO */
.hero{
  position:relative;min-height:100vh;
  display:flex;flex-direction:column;justify-content:center;
  padding:120px 32px 80px;max-width:1200px;margin:0 auto;
}
#sonar{position:absolute;inset:0;width:100%;height:100%;z-index:0;opacity:.85}
.hero-product{
  position:absolute;z-index:1;
  right:-2%;top:50%;transform:translateY(-50%);
  width:min(46vw,620px);height:auto;pointer-events:none;
  filter:drop-shadow(0 30px 55px rgba(0,0,0,.55)) drop-shadow(0 0 70px rgba(62,230,196,.18));
  will-change:transform;
  animation:float 7s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(calc(-50% - 10px))}50%{transform:translateY(calc(-50% + 10px))}}
.hero-content{position:relative;z-index:2;max-width:620px}
.eyebrow{
  font-size:.8rem;letter-spacing:.28em;text-transform:uppercase;
  color:var(--wave);margin-bottom:32px;font-weight:600;
}
.hero-title{
  font-family:var(--display);font-weight:800;
  font-size:clamp(2.8rem,8vw,6.4rem);line-height:.98;
  letter-spacing:-.035em;margin-bottom:36px;
}
.hero-title .line{display:block;overflow:hidden}
.hero-title .accent{color:var(--wave)}
.hero-sub{
  font-size:clamp(1.05rem,2vw,1.35rem);line-height:1.55;
  color:var(--ink-dim);max-width:620px;margin-bottom:40px;
}
.hero-meta{
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
  font-size:.85rem;color:var(--ink-faint);letter-spacing:.04em;
  text-transform:uppercase;font-weight:500;
}
.hero-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--ink-faint)}
.scroll-cue{
  position:absolute;bottom:38px;left:32px;z-index:2;
  display:flex;flex-direction:column;align-items:flex-start;gap:12px;
  font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-faint);
}
.cue-line{width:1px;height:52px;background:linear-gradient(var(--wave),transparent);position:relative;overflow:hidden}
.cue-line::after{content:"";position:absolute;top:0;left:0;width:100%;height:40%;background:var(--wave);animation:drop 2s ease-in-out infinite}
@keyframes drop{0%{transform:translateY(-100%)}100%{transform:translateY(300%)}}

/* MANIFESTO */
.manifesto{
  padding:22vh 32px;max-width:1100px;margin:0 auto;
}
.manifesto-text{
  font-family:var(--display);font-weight:700;
  font-size:clamp(1.8rem,5.5vw,4rem);line-height:1.15;
  letter-spacing:-.02em;
}
.manifesto-text .word{
  display:inline-block;margin-right:.28em;
  color:var(--ink-faint);
  transition:color .5s ease;
}
.manifesto-text .word.lit{color:var(--ink)}
.manifesto-text .word.em{color:var(--wave)}

/* SECTIONS shared */
.section{max-width:1200px;margin:0 auto;padding:14vh 32px}
.section-tag{
  font-size:.78rem;letter-spacing:.24em;text-transform:uppercase;
  color:var(--wave);font-weight:600;margin-bottom:20px;
}
.section-head{
  font-family:var(--display);font-weight:700;
  font-size:clamp(2rem,5vw,3.6rem);line-height:1.05;
  letter-spacing:-.03em;
}
.section-intro{margin-bottom:80px;max-width:760px}

/* SPLIT (projeto) */
.split{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:start}
.split-sticky{position:sticky;top:22vh}
.split-flow{display:flex;flex-direction:column;gap:56px}
.prose-block p{
  font-size:clamp(1.1rem,1.6vw,1.45rem);line-height:1.55;color:var(--ink-dim);
}
.prose-block:first-child p{color:var(--ink)}

/* STATS */
.stats{
  max-width:1200px;margin:0 auto;padding:8vh 32px 14vh;
  display:grid;grid-template-columns:repeat(3,1fr);gap:48px;
}
.stat{border-top:1px solid var(--line);padding-top:28px}
.stat-num{
  font-family:var(--display);font-weight:800;
  font-size:clamp(3.4rem,7vw,6rem);line-height:1;
  letter-spacing:-.04em;display:block;color:var(--wave);
}
.stat-num.plus::after{content:"";}
.stat-label{
  display:block;margin-top:16px;color:var(--ink-dim);
  font-size:.95rem;line-height:1.45;
}

/* STEPS */
.steps{display:flex;flex-direction:column;gap:0}
.step{
  display:grid;grid-template-columns:90px 1fr 220px;gap:40px;align-items:center;
  padding:52px 0;border-top:1px solid var(--line);
}
.step:last-child{border-bottom:1px solid var(--line)}
.step-index{
  font-family:var(--display);font-weight:700;font-size:1.05rem;
  color:var(--ink-faint);letter-spacing:.05em;
}
.step-body h3{
  font-family:var(--display);font-weight:700;font-size:clamp(1.5rem,3vw,2.3rem);
  letter-spacing:-.02em;margin-bottom:14px;
}
.step-body p{color:var(--ink-dim);font-size:1.05rem;line-height:1.55;max-width:520px}
.step-viz{height:120px;position:relative}
.step-viz canvas{width:100%;height:100%}

/* DEVICE */
.device-stage{display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:center}
.device-figure{position:relative;display:flex;align-items:center;justify-content:center}
.device-figure img{
  width:100%;height:auto;position:relative;z-index:2;
  filter:drop-shadow(0 30px 60px rgba(0,0,0,.6));
  transition:transform .6s cubic-bezier(.16,1,.3,1);
}
.device-figure:hover img{transform:scale(1.03) rotate(-1deg)}
.device-halo{
  position:absolute;inset:8% 8%;z-index:1;border-radius:50%;
  background:radial-gradient(circle,rgba(62,230,196,.22),transparent 62%);
  filter:blur(14px);animation:haloBeat 4s ease-in-out infinite;
}
@keyframes haloBeat{0%,100%{opacity:.55;transform:scale(.95)}50%{opacity:1;transform:scale(1.05)}}
.device-specs{list-style:none;display:flex;flex-direction:column;gap:2px}
.device-specs li{
  border-top:1px solid var(--line);padding:26px 0 26px 24px;position:relative;
}
.device-specs li:last-child{border-bottom:1px solid var(--line)}
.device-specs li::before{
  content:"";position:absolute;left:0;top:32px;width:10px;height:10px;border-radius:50%;
  background:var(--wave);box-shadow:0 0 14px rgba(62,230,196,.7);
}
.spec-k{display:block;font-family:var(--display);font-weight:600;font-size:1.15rem;margin-bottom:8px;letter-spacing:-.01em}
.spec-v{display:block;color:var(--ink-dim);line-height:1.5;font-size:1rem}

/* IMPACT */
.impact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:2px;background:var(--line)}
.impact-card{
  background:var(--bg);padding:44px 40px;
  transition:background .4s ease,transform .4s ease;
}
.impact-card:hover{background:var(--bg-soft)}
.impact-card h3{
  font-family:var(--display);font-weight:600;font-size:1.4rem;
  letter-spacing:-.01em;margin-bottom:16px;
}
.impact-card h3::before{
  content:"";display:block;width:34px;height:2px;background:var(--wave);margin-bottom:18px;
}
.impact-card p{color:var(--ink-dim);line-height:1.55;font-size:1.02rem}

/* REVIEWS */
.reviews-track{display:flex;flex-direction:column;gap:2px}
.review{
  background:var(--bg-soft);border-left:2px solid transparent;
  padding:44px 48px;position:relative;
  transition:border-color .5s ease,background .5s ease;
}
.review.reveal.in{border-left-color:var(--wave)}
.review p{
  font-family:var(--display);font-weight:400;
  font-size:clamp(1.15rem,2.2vw,1.7rem);line-height:1.4;
  letter-spacing:-.01em;color:var(--ink);
}
.review cite{
  display:block;margin-top:24px;font-style:normal;
  font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-faint);
}

/* CLOSING */
.closing{
  position:relative;min-height:80vh;display:flex;align-items:center;justify-content:center;
  text-align:center;padding:120px 32px;overflow:hidden;
}
#pulse{position:absolute;inset:0;width:100%;height:100%;z-index:0;opacity:.7}
.closing-content{position:relative;z-index:2}
.closing-content h2{
  font-family:var(--display);font-weight:800;
  font-size:clamp(3rem,10vw,8rem);letter-spacing:-.04em;line-height:1;
  background:linear-gradient(120deg,var(--ink),var(--wave));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.closing-content p{
  margin-top:28px;font-size:clamp(1.05rem,2vw,1.4rem);color:var(--ink-dim);
  max-width:560px;line-height:1.5;margin-left:auto;margin-right:auto;
}

/* FOOTER */
footer{border-top:1px solid var(--line);padding:32px}
.footer-inner{
  max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;
  flex-wrap:wrap;gap:12px;color:var(--ink-faint);font-size:.85rem;letter-spacing:.02em;
}

/* REVEAL animation */
.reveal{opacity:0;transform:translateY(38px);transition:opacity 1s cubic-bezier(.16,1,.3,1),transform 1s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}
.hero-title .line{opacity:0;transform:translateY(100%);transition:opacity .9s cubic-bezier(.16,1,.3,1),transform .9s cubic-bezier(.16,1,.3,1)}
.hero-title .line.in{opacity:1;transform:none}

/* RESPONSIVE */
@media(max-width:960px){
  .hero-product{
    position:static;transform:none;animation:none;
    width:min(72vw,360px);margin:0 auto 24px;display:block;
  }
  .hero{align-items:center;text-align:center}
  .hero-content{max-width:640px}
  .hero-meta,.eyebrow{justify-content:center}
  .device-stage{grid-template-columns:1fr;gap:36px}
  .device-figure img{max-width:420px;margin:0 auto}
}
@media(max-width:860px){
  .nav-links{display:none}
  .split{grid-template-columns:1fr;gap:40px}
  .split-sticky{position:static}
  .stats{grid-template-columns:1fr;gap:8px}
  .stat{padding-top:20px}
  .step{grid-template-columns:1fr;gap:16px;padding:40px 0}
  .step-viz{display:none}
  .impact-grid{grid-template-columns:1fr}
  .review{padding:32px 26px}
  .manifesto{padding:16vh 26px}
  .section{padding:12vh 26px}
  .nav-inner,.hero{padding-left:26px;padding-right:26px}
}

@media(prefers-reduced-motion:reduce){
  *{animation:none!important}
  .reveal,.hero-title .line{opacity:1!important;transform:none!important;transition:none!important}
  .cue-line::after{display:none}
}