:root{
    --rt-bg:#F6F7F9;
    --rt-surface:#FFFFFF;
    --rt-ink:#1C1D20;
    --rt-ink-soft:#5B6472;
    --rt-blue:#00ADEE;
    --rt-blue-deep:#2D2E32;
    --rt-line:#E4E7EC;
    --rt-cyan:#00ADEE;
    --rt-magenta:#E8368F;
    --rt-yellow:#F2B705;
    --rt-key:#2D2E32;
    --container:1160px;
    --radius:14px;
  }

  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{
    font-family:'Inter', sans-serif;
    color:var(--rt-ink);
    background:var(--rt-bg);
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4{
    font-family:'Space Grotesk', sans-serif;
    font-weight:600;
    letter-spacing:-0.02em;
    line-height:1.15;
  }
  .mono{
    font-family:'IBM Plex Mono', monospace;
    letter-spacing:0.02em;
  }
  a{color:inherit; text-decoration:none;}
  img{max-width:100%; display:block;}
  .container{
    width:100%;
    max-width:var(--container);
    margin:0 auto;
    padding:0 24px;
  }
  :focus-visible{
    outline:2px solid var(--rt-blue);
    outline-offset:3px;
    border-radius:4px;
  }
  section{padding:96px 0;}
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-family:'IBM Plex Mono', monospace;
    font-size:12.5px;
    font-weight:600;
    letter-spacing:0.12em;
    text-transform:uppercase;
    color:var(--rt-blue);
    margin-bottom:16px;
  }
  .dotset{display:inline-flex; gap:4px;}
  .dotset span{
    width:6px; height:6px; border-radius:50%; display:inline-block;
  }
  .dotset .c{background:var(--rt-cyan);}
  .dotset .m{background:var(--rt-magenta);}
  .dotset .y{background:var(--rt-yellow);}
  .dotset .k{background:var(--rt-key);}

  /* ===== HEADER ===== */
  header{
    position:fixed;
    top:0; left:0; right:0;
    z-index:100;
    background:rgba(246,247,249,0.85);
    backdrop-filter:blur(10px);
    border-bottom:1px solid transparent;
    transition:border-color .25s ease, background .25s ease;
  }
  header.scrolled{
    background:rgba(255,255,255,0.92);
    border-bottom-color:var(--rt-line);
  }
  .nav-wrap{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:18px 0;
  }
  .logo{
    display:flex;
    align-items:center;
    gap:10px;
  }
  .logo-img{
    height:42px;
    width:auto;
    display:block;
  }
  .logo-img-footer{
    height:52px;
    /* fundo do footer é escuro (--rt-ink); a arte já tem o cinza-grafite da marca */
  }

  nav ul{
    display:flex;
    gap:36px;
    list-style:none;
  }
  nav a{
    font-size:14.5px;
    font-weight:500;
    color:var(--rt-ink-soft);
    transition:color .2s ease;
  }
  nav a:hover{color:var(--rt-ink);}

  .nav-cta{
    display:flex;
    align-items:center;
    gap:18px;
  }
  .phone-mini{
    font-family:'IBM Plex Mono', monospace;
    font-size:13.5px;
    color:var(--rt-ink-soft);
    display:none;
  }
  .btn{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:11px 22px;
    border-radius:999px;
    font-size:14px;
    font-weight:600;
    cursor:pointer;
    border:1px solid transparent;
    transition:transform .15s ease, box-shadow .15s ease, background .2s ease;
  }
  .btn-primary{
    background:var(--rt-blue);
    color:#fff;
    box-shadow:0 1px 2px rgba(0,173,238,0.3);
  }
  .btn-primary:hover{transform:translateY(-1px); box-shadow:0 6px 16px rgba(0,173,238,0.32);}
  .btn-ghost{
    background:transparent;
    border-color:var(--rt-line);
    color:var(--rt-ink);
  }
  .btn-ghost:hover{border-color:var(--rt-ink);}

  .menu-toggle{
    display:none;
    flex-direction:column;
    gap:5px;
    background:none; border:none; cursor:pointer;
    padding:6px;
  }
  .menu-toggle span{
    width:22px; height:2px; background:var(--rt-ink); border-radius:2px;
  }

  /* ===== HERO ===== */
  .hero{
    padding:168px 0 100px;
    background:
      radial-gradient(circle at 1px 1px, rgba(18,22,28,0.06) 1px, transparent 0) 0 0/22px 22px,
      var(--rt-bg);
    overflow:hidden;
  }
  .hero-grid{
    display:grid;
    grid-template-columns:1.05fr 0.95fr;
    gap:64px;
    align-items:center;
  }
  .hero h1{
    font-size:clamp(34px, 4.2vw, 54px);
    margin-bottom:22px;
  }
  .hero h1 em{
    font-style:normal;
    color:var(--rt-blue);
  }
  .hero p.lede{
    font-size:17.5px;
    color:var(--rt-ink-soft);
    max-width:480px;
    margin-bottom:34px;
  }
  .hero-actions{
    display:flex;
    gap:14px;
    flex-wrap:wrap;
    margin-bottom:52px;
  }
  .stat-row{
    display:flex;
    gap:40px;
    border-top:1px solid var(--rt-line);
    padding-top:26px;
  }
  .stat-row div{display:flex; flex-direction:column; gap:4px;}
  .stat-num{
    font-family:'IBM Plex Mono', monospace;
    font-size:24px;
    font-weight:600;
    color:var(--rt-ink);
  }
  .stat-label{font-size:12.5px; color:var(--rt-ink-soft);}

  /* signature: print-head sweep */
  .print-visual{
    position:relative;
    aspect-ratio:1/1;
    background:var(--rt-surface);
    border:1px solid var(--rt-line);
    border-radius:20px;
    overflow:hidden;
  }
  .print-visual .sheet{
    position:absolute;
    inset:26px;
    background:#fff;
    border:1px solid var(--rt-line);
    border-radius:6px;
    box-shadow:0 20px 40px -18px rgba(18,22,28,0.18);
  }
  .print-visual .sheet::before{
    content:"";
    position:absolute;
    left:16px; right:16px; top:20px;
    height:6px; border-radius:3px;
    background:var(--rt-line);
  }
  .print-visual .sheet::after{
    content:"";
    position:absolute;
    left:16px; right:40%; top:38px;
    height:6px; border-radius:3px;
    background:var(--rt-line);
  }
  .carriage{
    position:absolute;
    top:64px;
    left:26px;
    width:34px; height:34px;
    border-radius:8px;
    background:var(--rt-blue-deep);
    display:flex; align-items:center; justify-content:center;
    gap:3px;
    box-shadow:0 10px 22px -8px rgba(45,46,50,0.5);
    animation:sweep 5.5s ease-in-out infinite;
  }
  .carriage span{
    width:5px; height:5px; border-radius:50%;
  }
  .carriage .c{background:var(--rt-cyan);}
  .carriage .m{background:var(--rt-magenta);}
  .carriage .y{background:var(--rt-yellow);}
  .carriage .k{background:#fff;}
  @keyframes sweep{
    0%,8%{left:26px;}
    45%,55%{left:calc(100% - 60px);}
    92%,100%{left:26px;}
  }
  .rail{
    position:absolute;
    top:80px; left:26px; right:26px;
    height:1px;
    background:var(--rt-line);
  }

  /* ===== ABOUT ===== */
  .about{background:var(--rt-surface); border-top:1px solid var(--rt-line); border-bottom:1px solid var(--rt-line);}
  .about-grid{
    display:grid;
    grid-template-columns:0.85fr 1.15fr;
    gap:70px;
    align-items:center;
  }
  .about-visual{
    background:var(--rt-bg);
    border:1px solid var(--rt-line);
    border-radius:var(--radius);
    aspect-ratio:4/5;
    display:flex;
    align-items:center;
    justify-content:center;
    position:relative;
  }
  .about-visual svg{width:52%; height:52%;}
  .about h2{font-size:clamp(28px,3vw,38px); margin-bottom:20px;}
  .about p{color:var(--rt-ink-soft); font-size:16px; margin-bottom:16px; max-width:560px;}
  .about .placeholder-note{
    font-family:'IBM Plex Mono', monospace;
    font-size:12px;
    color:var(--rt-magenta);
    background:rgba(232,54,143,0.07);
    border:1px dashed rgba(232,54,143,0.35);
    border-radius:8px;
    padding:10px 12px;
    margin-bottom:20px;
    max-width:560px;
  }
  .feature-list{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:18px;
    margin-top:28px;
  }
  .feature-item{
    display:flex;
    gap:12px;
    align-items:flex-start;
  }
  .feature-item .ico{
    width:30px; height:30px;
    border-radius:8px;
    background:var(--rt-bg);
    border:1px solid var(--rt-line);
    display:flex; align-items:center; justify-content:center;
    flex-shrink:0;
  }
  .feature-item .ico svg{width:15px; height:15px; color:var(--rt-blue);}
  .feature-item h4{font-size:14.5px; margin-bottom:3px;}
  .feature-item p{font-size:13.5px; color:var(--rt-ink-soft); margin:0;}

  /* ===== SERVICES ===== */
  .services-head{
    max-width:600px;
    margin-bottom:52px;
  }
  .services-head h2{font-size:clamp(28px,3vw,38px); margin-bottom:16px;}
  .services-head p{color:var(--rt-ink-soft); font-size:16px;}
  .services-grid{
    display:grid;
    grid-template-columns:repeat(3, 1fr);
    gap:20px;
  }
  .service-card{
    background:var(--rt-surface);
    border:1px solid var(--rt-line);
    border-radius:var(--radius);
    padding:28px 26px;
    transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  }
  .service-card:hover{
    transform:translateY(-3px);
    box-shadow:0 16px 32px -20px rgba(18,22,28,0.25);
    border-color:#D3D8E0;
  }
  .service-card .ico{
    width:42px; height:42px;
    border-radius:10px;
    background:var(--rt-blue-deep);
    display:flex; align-items:center; justify-content:center;
    margin-bottom:18px;
  }
  .service-card .ico svg{width:21px; height:21px; color:#fff;}
  .service-card h3{font-size:17px; margin-bottom:8px;}
  .service-card p{font-size:14px; color:var(--rt-ink-soft);}

  /* ===== CONTACT ===== */
  .contact{background:var(--rt-blue-deep); color:#fff;}
  .contact-grid{
    display:grid;
    grid-template-columns:0.9fr 1.1fr;
    gap:60px;
  }
  .contact h2{font-size:clamp(28px,3vw,36px); color:#fff; margin-bottom:14px;}
  .contact > .container > .contact-grid > div:first-child p.lede{
    color:rgba(255,255,255,0.65);
    font-size:15.5px;
    margin-bottom:32px;
    max-width:420px;
  }
  .contact-info-item{
    display:flex;
    gap:14px;
    align-items:flex-start;
    padding:16px 0;
    border-top:1px solid rgba(255,255,255,0.12);
  }
  .contact-info-item:first-of-type{border-top:1px solid rgba(255,255,255,0.12);}
  .contact-info-item .ico{
    width:32px; height:32px;
    border-radius:8px;
    background:rgba(255,255,255,0.08);
    display:flex; align-items:center; justify-content:center;
    flex-shrink:0;
  }
  .contact-info-item .ico svg{width:16px; height:16px; color:#fff;}
  .contact-info-item .label{
    font-family:'IBM Plex Mono', monospace;
    font-size:11.5px;
    letter-spacing:0.08em;
    text-transform:uppercase;
    color:rgba(255,255,255,0.5);
    margin-bottom:3px;
  }
  .contact-info-item .value{font-size:15px; font-weight:500;}

  .contact-form{
    background:#fff;
    border-radius:18px;
    padding:36px;
    color:var(--rt-ink);
  }
  .contact-form h3{font-size:19px; margin-bottom:6px;}
  .contact-form > p{color:var(--rt-ink-soft); font-size:14px; margin-bottom:24px;}
  .form-row{display:grid; grid-template-columns:1fr 1fr; gap:14px; margin-bottom:14px;}
  label{
    display:block;
    font-size:12.5px;
    font-weight:600;
    margin-bottom:6px;
    color:var(--rt-ink-soft);
  }
  input, textarea{
    width:100%;
    border:1px solid var(--rt-line);
    border-radius:9px;
    padding:11px 13px;
    font-family:'Inter', sans-serif;
    font-size:14.5px;
    background:var(--rt-bg);
    color:var(--rt-ink);
    transition:border-color .2s ease;
  }
  input:focus, textarea:focus{border-color:var(--rt-blue); outline:none;}
  textarea{resize:vertical; min-height:96px;}
  .form-full{margin-bottom:20px;}
  .contact-form .btn-primary{width:100%; justify-content:center; padding:13px;}

  /* ===== FOOTER ===== */
  footer{
    background:var(--rt-ink);
    color:rgba(255,255,255,0.6);
    padding:48px 0 28px;
  }
  .footer-top{
    display:flex;
    justify-content:space-between;
    align-items:flex-start;
    flex-wrap:wrap;
    gap:32px;
    padding-bottom:32px;
    border-bottom:1px solid rgba(255,255,255,0.1);
  }
  .footer-brand .logo{color:#fff;}
  .footer-brand p{font-size:13.5px; margin-top:10px; max-width:260px; color:rgba(255,255,255,0.45);}
  .footer-links{display:flex; gap:64px; flex-wrap:wrap;}
  .footer-col h5{
    font-family:'IBM Plex Mono', monospace;
    font-size:11.5px;
    letter-spacing:0.08em;
    text-transform:uppercase;
    color:rgba(255,255,255,0.4);
    margin-bottom:14px;
  }
  .footer-col ul{list-style:none; display:flex; flex-direction:column; gap:10px;}
  .footer-col a{font-size:13.5px; color:rgba(255,255,255,0.72); transition:color .2s ease;}
  .footer-col a:hover{color:#fff;}
  .footer-bottom{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding-top:24px;
    font-size:12.5px;
    flex-wrap:wrap;
    gap:12px;
  }
  .footer-credit a{
    color:rgba(255,255,255,0.75);
    font-weight:600;
    text-decoration:none;
    border-bottom:1px solid rgba(255,255,255,0.3);
    transition:color .2s ease, border-color .2s ease;
  }
  .footer-credit a:hover{
    color:#fff;
    border-color:rgba(255,255,255,0.7);
  }

  /* ===== reveal on scroll ===== */
  .reveal{opacity:0; transform:translateY(16px); transition:opacity .6s ease, transform .6s ease;}
  .reveal.in{opacity:1; transform:translateY(0);}

  /* ---------- Botão flutuante de WhatsApp ---------- */
  .whatsapp-fab{
    position:fixed;
    right:22px;
    bottom:22px;
    z-index:200;
    display:flex;
    align-items:center;
    gap:12px;
  }
  .whatsapp-fab .fab-tip{
    background:var(--rt-ink);
    color:#fff;
    font-family:'Inter', sans-serif;
    font-size:13.5px;
    font-weight:500;
    padding:9px 14px;
    border-radius:8px;
    white-space:nowrap;
    opacity:0;
    transform:translateX(6px);
    transition:opacity .2s ease, transform .2s ease;
    pointer-events:none;
    box-shadow:0 10px 24px -12px rgba(18,22,28,0.4);
  }
  .whatsapp-fab:hover .fab-tip{opacity:1; transform:translateX(0);}
  .whatsapp-fab .fab-btn{
    position:relative;
    width:58px; height:58px;
    border-radius:50%;
    background:#25D366;
    color:#fff;
    display:grid;
    place-items:center;
    box-shadow:0 14px 30px -10px rgba(18,22,28,0.45);
    transition:transform .2s ease, background .2s ease;
    flex:none;
  }
  .whatsapp-fab .fab-btn svg{width:28px; height:28px;}
  .whatsapp-fab .fab-btn:hover{background:#20BD5A; transform:translateY(-2px);}
  .whatsapp-fab .fab-ring{
    position:absolute;
    inset:0;
    border:2px solid #25D366;
    border-radius:50%;
    animation:fabPing 2.6s cubic-bezier(0.2, 0.7, 0.4, 1) infinite;
  }
  @keyframes fabPing{
    0%{transform:scale(1); opacity:.55;}
    75%, 100%{transform:scale(1.7); opacity:0;}
  }
  @media (prefers-reduced-motion: reduce){
    .whatsapp-fab .fab-ring{animation:none;}
  }
  @media (max-width:560px){
    .whatsapp-fab{right:16px; bottom:16px;}
    .whatsapp-fab .fab-btn{width:52px; height:52px;}
    .whatsapp-fab .fab-btn svg{width:25px; height:25px;}
    .whatsapp-fab .fab-tip{display:none;}
  }

  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto;}
    .carriage{animation:none; left:26px;}
    .reveal{opacity:1; transform:none; transition:none;}
  }

  /* ===== responsive ===== */
  @media (min-width:860px){
    .phone-mini{display:block;}
  }
  @media (max-width:900px){
    nav{display:none;}
    .menu-toggle{display:flex;}
    .hero-grid, .about-grid, .contact-grid{grid-template-columns:1fr;}
    .print-visual{max-width:420px; margin:0 auto;}
    .services-grid{grid-template-columns:1fr 1fr;}
    .feature-list{grid-template-columns:1fr;}
    .form-row{grid-template-columns:1fr;}
    .footer-links{gap:36px;}
  }
  @media (max-width:560px){
    section{padding:64px 0;}
    .hero{padding-top:140px;}
    .services-grid{grid-template-columns:1fr;}
    .stat-row{gap:24px; flex-wrap:wrap;}
    .contact-form{padding:26px;}
  }