:root{
    --ink:#0F0F12;
    --osso:#F2EEE3;
    --sinal:#FF4A24;
    --acido:#C9F24A;
    --mute-dark:#A3A199;
    --mute-light:#6B6A63;
    --line-dark:#2A2A2E;
    --line-light:#D8D3C4;
    --display:'Space Grotesk',sans-serif;
    --body:'Inter',sans-serif;
  }
  *{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{font-family:var(--body);background:var(--ink);color:var(--osso);-webkit-font-smoothing:antialiased;line-height:1.6}
  a{color:inherit;text-decoration:none}
  .wrap{max-width:1120px;margin:0 auto;padding:0 24px}
  .eyebrow{font-family:var(--display);font-size:12px;font-weight:500;letter-spacing:2.5px;text-transform:uppercase}

  /* NAV */
  nav{position:sticky;top:0;z-index:50;background:rgba(15,15,18,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line-dark)}
  .nav-in{display:flex;align-items:center;justify-content:space-between;height:68px}
  .brand{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:700;font-size:20px;letter-spacing:-.5px}
  .brand .ia{color:var(--sinal);font-size:12px;letter-spacing:3px;font-weight:700}
  .nav-links{display:flex;align-items:center;gap:30px}
  .nav-links a{font-size:14px;color:var(--mute-dark);transition:color .2s}
  .nav-links a:hover{color:var(--osso)}
  .btn{font-family:var(--display);font-weight:500;font-size:14px;padding:11px 20px;border-radius:10px;transition:transform .15s,background .2s;display:inline-block;cursor:pointer;border:none}
  .btn-sinal{background:var(--sinal);color:var(--ink)}
  .btn-sinal:hover{transform:translateY(-1px)}
  .btn-ghost{border:1px solid var(--line-dark);color:var(--osso)}
  .btn-ghost:hover{border-color:var(--osso)}
  .nav-cta{display:inline-block}
  .menu-btn{display:none;background:none;border:none;color:var(--osso);font-size:24px;cursor:pointer}

  /* HERO */
  .hero{padding:88px 0 96px;position:relative;overflow:hidden}
  .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
  .hero h1{font-family:var(--display);font-weight:700;font-size:clamp(38px,6vw,64px);line-height:1.02;letter-spacing:-2px}
  .hero h1 .accent{color:var(--sinal)}
  .hero p.lead{font-size:19px;color:var(--mute-dark);max-width:460px;margin-top:24px}
  .hero .eyebrow{color:var(--acido);margin-bottom:22px}
  .hero-cta{display:flex;gap:14px;margin-top:36px;flex-wrap:wrap}
  .btn-lg{padding:15px 28px;font-size:15px}

  /* animated mark */
  .mark-stage{display:flex;flex-direction:column;align-items:center;gap:20px}
  .mark-box{width:100%;max-width:340px;aspect-ratio:1;background:#141418;border:1px solid var(--line-dark);border-radius:24px;display:flex;align-items:center;justify-content:center}
  .mark-box svg{width:62%}
  .seg-label{font-family:var(--display);font-size:13px;letter-spacing:2px;text-transform:uppercase;color:var(--mute-dark)}
  .seg-label b{color:var(--acido);font-weight:500}
  circle.dot{transition:r .5s cubic-bezier(.4,0,.2,1),fill .5s ease}

  /* SISTEMA VIVO */
  .sistema{background:var(--osso);color:var(--ink);padding:96px 0}
  .sistema .eyebrow{color:var(--sinal)}
  .sistema h2{font-family:var(--display);font-weight:700;font-size:clamp(28px,4.5vw,44px);letter-spacing:-1.2px;margin:16px 0 18px;max-width:640px;line-height:1.05}
  .sistema .sub{font-size:18px;color:var(--mute-light);max-width:560px}
  .seg-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:52px}
  .seg-card{background:#fff;border:1px solid var(--line-light);border-radius:16px;padding:26px 24px;transition:transform .18s,border-color .18s}
  .seg-card:hover{transform:translateY(-3px);border-color:var(--ink)}
  .seg-card svg{width:52px;height:52px;margin-bottom:18px}
  .seg-card h3{font-family:var(--display);font-weight:500;font-size:19px;letter-spacing:-.3px}
  .seg-card p{font-size:14.5px;color:var(--mute-light);margin-top:7px}

  /* VALOR */
  .valor{padding:96px 0;border-bottom:1px solid var(--line-dark)}
  .valor .eyebrow{color:var(--acido);text-align:center;display:block}
  .valor h2{font-family:var(--display);font-weight:700;font-size:clamp(26px,4vw,40px);letter-spacing:-1px;text-align:center;margin:16px auto 60px;max-width:620px;line-height:1.1}
  .val-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
  .val-item{border-top:2px solid var(--sinal);padding-top:22px}
  .val-item .num{font-family:var(--display);font-size:13px;color:var(--mute-dark);letter-spacing:1px}
  .val-item h3{font-family:var(--display);font-weight:500;font-size:21px;letter-spacing:-.4px;margin:12px 0 10px}
  .val-item p{font-size:15px;color:var(--mute-dark)}

  /* CTA */
  .cta{padding:104px 0;text-align:center}
  .cta h2{font-family:var(--display);font-weight:700;font-size:clamp(32px,5.5vw,56px);letter-spacing:-1.6px;line-height:1.03;max-width:720px;margin:0 auto}
  .cta h2 .accent{color:var(--sinal)}
  .cta p{font-size:18px;color:var(--mute-dark);margin:22px auto 40px;max-width:480px}

  /* FOOTER */
  footer{border-top:1px solid var(--line-dark);padding:44px 0}
  .foot-in{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px}
  .foot-in .brand{font-size:18px}
  .foot-links{display:flex;gap:26px;font-size:14px;color:var(--mute-dark)}
  .foot-links a:hover{color:var(--osso)}
  .copy{font-size:13px;color:var(--mute-light);margin-top:28px}

  @media(max-width:860px){
    .hero-grid{grid-template-columns:1fr;gap:44px}
    .mark-stage{order:-1}
    .seg-cards{grid-template-columns:1fr 1fr}
    .val-grid{grid-template-columns:1fr}
    .nav-links{display:none}
    .menu-btn{display:block}
  }
  @media(max-width:520px){
    .seg-cards{grid-template-columns:1fr}
  }
  @media(prefers-reduced-motion:reduce){
    circle.dot{transition:none}
  }