/* ============================================================
   VIVAÇO SOLUÇÕES — design system "aço & solda"
   Sem dependências. Mobile-first. Acessível.
   ============================================================ */
:root{
  --bg:#0B0C0F;            /* preto industrial */
  --bg-2:#101218;          /* grafite */
  --panel:#14171E;         /* chapa */
  --line:#232833;          /* rebite */
  --txt:#F2F4F8;
  --mut:#9AA3B2;
  --mut-2:#6A7280;
  --weld:#FF8A00;          /* laranja solda */
  --weld-2:#FFB020;        /* âmbar da marca */
  --blue:#4C8DFF;
  --r:18px;
  --wrap:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}
body{
  background:var(--bg);color:var(--txt);
  font-family:Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3{font-family:'Space Grotesk',Inter,sans-serif;line-height:1.12;letter-spacing:-.01em}
img{max-width:100%;display:block}
a{color:inherit}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}

::selection{background:rgba(255,138,0,.35)}
:focus-visible{outline:2px solid var(--weld-2);outline-offset:3px;border-radius:6px}

/* ---------- botões ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:15px;
  padding:13px 22px;border-radius:14px;text-decoration:none;border:1px solid transparent;
  cursor:pointer;transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
  will-change:transform}
.btn-lg{padding:16px 28px;font-size:16px}
.btn-solid{background:linear-gradient(135deg,var(--weld),var(--weld-2));color:#1d1200;
  box-shadow:0 8px 28px rgba(255,138,0,.28)}
.btn-solid:hover{transform:translateY(-2px) scale(1.02);box-shadow:0 14px 38px rgba(255,138,0,.4)}
.btn-ghost{border-color:var(--line);color:var(--txt);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--mut-2);background:rgba(255,255,255,.05);transform:translateY(-2px)}

/* ---------- header ---------- */
.hd{position:fixed;inset:0 0 auto;z-index:100;transition:background .25s ease, box-shadow .25s ease;
  background:rgba(11,12,15,.55);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.05)}
.hd.on{background:rgba(11,12,15,.88);box-shadow:0 10px 30px rgba(0,0,0,.35)}
.hd-in{max-width:var(--wrap);margin:0 auto;padding:14px 22px;display:flex;align-items:center;gap:26px}
.hd-logo{display:flex;align-items:center;gap:12px;text-decoration:none;font-family:'Space Grotesk';font-weight:700;letter-spacing:1.5px;font-size:17px}
.hd-logo img{height:30px;width:auto}
.hd-logo small{display:block;font-family:Inter;font-weight:500;font-size:9.5px;letter-spacing:1.8px;color:var(--mut);text-transform:uppercase}
.hd-nav{display:flex;gap:26px;margin-left:auto}
.hd-nav a{text-decoration:none;color:var(--mut);font-size:14px;font-weight:500;position:relative;padding:6px 0;transition:color .18s}
.hd-nav a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--weld);transition:width .22s ease;border-radius:2px}
.hd-nav a:hover{color:var(--txt)}
.hd-nav a:hover::after{width:100%}
.hd-cta{flex:none}
.hamb{display:none;background:none;border:0;cursor:pointer;padding:8px;margin-left:auto}
.hamb span{display:block;width:24px;height:2px;background:var(--txt);margin:5px 0;border-radius:2px;transition:.25s}

/* ---------- hero ---------- */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;justify-content:center;
  text-align:center;overflow:hidden;
  background:
    radial-gradient(1000px 500px at 50% -10%, rgba(76,141,255,.06), transparent 60%),
    linear-gradient(180deg,#0B0C0F 0%, #0D0F14 100%)}
#weld{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.hero-glow{position:absolute;left:50%;bottom:-180px;width:640px;height:380px;transform:translateX(-50%);
  background:radial-gradient(ellipse at center, rgba(255,138,0,.14), transparent 68%);pointer-events:none}
.hero-in{position:relative;z-index:2;max-width:880px;padding:120px 24px 80px}
.hero-kicker{font-size:12.5px;letter-spacing:3px;text-transform:uppercase;color:var(--weld-2);font-weight:600;margin-bottom:22px}
.hero h1{font-size:clamp(42px, 7.2vw, 84px);font-weight:700}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,var(--weld),var(--weld-2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{max-width:640px;margin:26px auto 38px;color:var(--mut);font-size:clamp(16px,2vw,19px)}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-scroll{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);width:26px;height:42px;
  border:2px solid var(--mut-2);border-radius:16px;display:flex;justify-content:center;padding-top:7px}
.hero-scroll span{width:3px;height:8px;border-radius:3px;background:var(--weld-2);animation:scrolldot 1.6s infinite}
@keyframes scrolldot{0%{transform:translateY(0);opacity:1}70%{transform:translateY(14px);opacity:0}100%{opacity:0}}

/* ---------- números ---------- */
.numbers{border-block:1px solid var(--line);background:var(--bg-2)}
.num-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:44px 22px}
.num{text-align:center}
.num b{font-family:'Space Grotesk';font-size:clamp(34px,4vw,52px);font-weight:700;color:var(--txt)}
.num i{font-style:normal;font-family:'Space Grotesk';font-size:clamp(24px,3vw,34px);color:var(--weld);font-weight:700}
.num span{display:block;color:var(--mut);font-size:13.5px;margin-top:6px}

/* ---------- seções ---------- */
.sec{padding:104px 0}
.sec-alt{background:var(--bg-2);border-block:1px solid var(--line)}
.sec-kicker{font-size:12px;letter-spacing:3px;text-transform:uppercase;color:var(--weld-2);font-weight:600;margin-bottom:14px}
.sec h2{font-size:clamp(30px,4.4vw,46px);margin-bottom:16px}
.sec h2 em{font-style:normal;color:var(--weld-2)}
.sec-sub{color:var(--mut);max-width:620px;font-size:17px;margin-bottom:48px}

/* ---------- cards serviços ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:linear-gradient(165deg,var(--panel),#11141B);border:1px solid var(--line);border-radius:var(--r);
  padding:34px 30px;position:relative;overflow:hidden;
  transition:transform .22s ease, border-color .22s ease, box-shadow .22s ease}
.card::before{content:"";position:absolute;inset:0 0 auto;height:3px;
  background:linear-gradient(90deg,transparent,var(--weld),transparent);opacity:0;transition:opacity .25s}
.card:hover{transform:translateY(-6px);border-color:rgba(255,138,0,.35);box-shadow:0 22px 50px rgba(0,0,0,.45)}
.card:hover::before{opacity:1}
.card-ic{color:var(--weld-2);margin-bottom:20px}
.card h3{font-size:21px;margin-bottom:10px}
.card p{color:var(--mut);font-size:14.5px;margin-bottom:18px}
.card ul{list-style:none}
.card li{color:var(--mut);font-size:13.5px;padding:7px 0 7px 22px;border-top:1px solid var(--line);position:relative}
.card li::before{content:"—";position:absolute;left:0;color:var(--weld)}

/* ---------- locação ---------- */
.equip-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.eq{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px 22px;
  display:flex;flex-direction:column;gap:4px;transition:transform .2s ease, border-color .2s ease}
.eq:hover{transform:translateY(-4px);border-color:rgba(255,176,32,.4)}
.eq-ic{font-size:26px;margin-bottom:8px}
.eq b{font-family:'Space Grotesk';font-size:16.5px}
.eq span:last-child{color:var(--mut);font-size:13px}
.loc-cta{margin-top:44px;display:flex;align-items:center;gap:22px;flex-wrap:wrap;
  background:rgba(255,138,0,.05);border:1px solid rgba(255,138,0,.2);border-radius:16px;padding:24px 28px}
.loc-cta p{color:var(--mut);flex:1;min-width:240px}

/* ---------- processo (viga soldada) ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;position:relative;margin-top:52px}
.steps::before{content:"";position:absolute;top:9px;left:4%;right:4%;height:2px;
  background:linear-gradient(90deg,transparent,var(--line) 12%,var(--line) 88%,transparent)}
.step{position:relative;padding-top:34px}
.s-dot{position:absolute;top:0;left:0;width:20px;height:20px;border-radius:50%;
  background:radial-gradient(circle at 35% 35%, var(--weld-2), var(--weld));
  box-shadow:0 0 0 5px rgba(255,138,0,.15), 0 0 18px rgba(255,138,0,.5)}
.step b{font-family:'Space Grotesk';font-size:17px;display:block;margin-bottom:8px}
.step p{color:var(--mut);font-size:14px}

/* ---------- sobre ---------- */
.about{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.about-txt p{color:var(--mut);margin-bottom:16px}
.about-txt p b{color:var(--txt)}
.about-badges{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.about-badges span{font-size:13px;color:var(--weld-2);background:rgba(255,176,32,.08);
  border:1px solid rgba(255,176,32,.22);padding:8px 14px;border-radius:30px}
.about-art{display:flex;justify-content:center}
.about-art img{width:min(360px,80%);opacity:.9;filter:drop-shadow(0 18px 50px rgba(0,0,0,.55))}

/* ---------- contato ---------- */
.contact{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start}
.c-txt p{color:var(--mut)}
.c-list{margin-top:30px;display:flex;flex-direction:column;gap:12px}
.c-list a,.c-list div{display:flex;flex-direction:column;text-decoration:none;
  background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px 20px;transition:border-color .2s}
.c-list a:hover{border-color:rgba(255,138,0,.4)}
.c-list b{font-size:13px;color:var(--weld-2);letter-spacing:.6px;text-transform:uppercase;font-family:'Space Grotesk'}
.c-list span{font-size:16px;margin-top:2px}
.c-form{background:linear-gradient(165deg,var(--panel),#11141B);border:1px solid var(--line);
  border-radius:var(--r);padding:34px}
.c-form label{display:block;font-size:13px;color:var(--mut);font-weight:500;margin-bottom:16px}
.c-form input,.c-form select,.c-form textarea{
  width:100%;margin-top:7px;background:#0D0F14;border:1px solid var(--line);border-radius:12px;
  color:var(--txt);font:inherit;font-size:15px;padding:13px 15px;transition:border-color .18s}
.c-form input:focus,.c-form select:focus,.c-form textarea:focus{border-color:var(--weld);outline:none}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.f-send{width:100%;justify-content:center;margin-top:6px}
.f-note{font-size:12px;color:var(--mut-2);text-align:center;margin-top:12px}
.c-form .err{border-color:#FF6B5E!important}

/* ---------- footer ---------- */
.ft{border-top:1px solid var(--line);background:#0A0B0E}
.ft-in{display:flex;align-items:center;justify-content:space-between;gap:26px;padding:42px 22px;flex-wrap:wrap}
.ft-brand{display:flex;align-items:center;gap:16px}
.ft-brand img{height:34px;width:auto;opacity:.95}
.ft-brand p{font-family:'Space Grotesk';font-size:15px}
.ft-brand span{font-family:Inter;color:var(--mut-2);font-size:12.5px}
.ft-nav{display:flex;gap:22px;flex-wrap:wrap}
.ft-nav a{color:var(--mut);text-decoration:none;font-size:13.5px}
.ft-nav a:hover{color:var(--txt)}
.ft-bar{border-top:1px solid var(--line);padding:18px 22px;display:flex;justify-content:space-between;gap:14px;
  flex-wrap:wrap;max-width:var(--wrap);margin:0 auto;font-size:12.5px;color:var(--mut-2)}
.ft-bar a{color:var(--mut);text-decoration:none;border-bottom:1px dotted var(--mut-2)}
.ft-bar a:hover{color:var(--weld-2);border-color:var(--weld-2)}

/* ---------- whatsapp flutuante ---------- */
.wa-float{position:fixed;right:22px;bottom:22px;z-index:90;width:58px;height:58px;border-radius:50%;
  background:#25D366;color:#053;display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 30px rgba(37,211,102,.4);transition:transform .2s ease}
.wa-float:hover{transform:scale(1.08)}

/* ---------- reveal on scroll (o CSS nunca esconde; o JS controla) ---------- */
.reveal{transition:opacity .7s ease, transform .7s ease}

/* ---------- responsivo ---------- */
@media(max-width:1020px){
  .cards{grid-template-columns:1fr 1fr}
  .equip-grid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr;gap:34px}
  .steps::before{display:none}
  .about,.contact{grid-template-columns:1fr;gap:40px}
  .about-art{order:-1}
  .about-art img{width:min(260px,60%)}
}
@media(max-width:760px){
  .hd-nav{position:fixed;inset:62px 0 auto;background:rgba(11,12,15,.98);backdrop-filter:blur(16px);
    flex-direction:column;gap:0;padding:12px 22px 22px;border-bottom:1px solid var(--line);
    transform:translateY(-130%);transition:transform .28s ease}
  .hd-nav.open{transform:none}
  .hd-nav a{padding:14px 0;font-size:16px;border-bottom:1px solid rgba(255,255,255,.05)}
  .hd-cta{display:none}
  .hamb{display:block}
  .hamb.x span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .hamb.x span:nth-child(2){opacity:0}
  .hamb.x span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .num-grid{grid-template-columns:1fr 1fr;gap:28px}
  .sec{padding:76px 0}
  .cards,.equip-grid,.steps,.f-row{grid-template-columns:1fr}
  .loc-cta{flex-direction:column;align-items:flex-start}
  .c-form{padding:26px 20px}
  .ft-in{flex-direction:column;align-items:flex-start}
}