/* ============================================================
   BM ESTRUTURAL — Repaginação industrial moderna
   Azul-marinho + amarelo sobre concreto. Cantos retos,
   réguas finas, rótulos técnicos monoespaçados.
   ============================================================ */

:root{
  --navy:#06223F;
  --navy-700:#0A2C50;
  --navy-800:#072039;
  --navy-900:#04182E;
  --yellow:#EDCD1F;
  --yellow-deep:#D9B400;
  --concrete:#ECE8E1;
  --concrete-2:#F4F1EB;
  --paper:#FBFAF7;
  --ink:#11161D;
  --muted:#5C6772;
  --line:rgba(6,34,63,.14);
  --line-strong:rgba(6,34,63,.28);
  --line-light:rgba(255,255,255,.16);
  --display:'Archivo Expanded','Archivo',system-ui,sans-serif;
  --head:'Archivo',system-ui,sans-serif;
  --body:'IBM Plex Sans',system-ui,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
  --maxw:1280px;
  --gut:clamp(20px,5vw,72px);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--body);
  color:var(--ink);
  background:var(--concrete);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}

.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gut)}

/* ---- shared type ---- */
.mono{font-family:var(--mono);font-weight:500;letter-spacing:.14em;text-transform:uppercase}
.kicker{
  font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.22em;
  text-transform:uppercase;color:var(--muted);display:inline-flex;align-items:center;gap:.7em;
}
.kicker::before{content:"";width:26px;height:2px;background:var(--yellow)}
.kicker.on-dark{color:rgba(255,255,255,.62)}

.display{font-family:var(--display);font-weight:800;line-height:.96;letter-spacing:-.01em}

/* technical L-corner ticks */
.ticks{position:relative}
.ticks::before,.ticks::after{
  content:"";position:absolute;width:14px;height:14px;pointer-events:none;
}
.ticks::before{top:0;left:0;border-top:2px solid var(--yellow);border-left:2px solid var(--yellow)}
.ticks::after{bottom:0;right:0;border-bottom:2px solid var(--yellow);border-right:2px solid var(--yellow)}

/* ============================================================
   HEADER
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--navy);
  border-bottom:1px solid var(--line-light);
  transition:box-shadow .3s ease;
}
.site-header.scrolled{box-shadow:0 14px 40px -18px rgba(0,0,0,.6)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:84px}
.brand{display:flex;align-items:center;gap:14px}
.brand img{height:50px;width:auto}
.nav{display:flex;align-items:center;gap:4px}
.nav a{
  font-family:var(--head);font-size:13.5px;font-weight:600;letter-spacing:.06em;
  text-transform:uppercase;color:rgba(255,255,255,.82);
  padding:10px 14px;position:relative;transition:color .2s;
}
.nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--yellow);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav a:hover,.nav a.active{color:#fff}
.nav a:hover::after,.nav a.active::after{transform:scaleX(1)}
.header-cta{
  font-family:var(--head);font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  background:var(--yellow);color:var(--navy-900);padding:13px 22px;
  border:0;transition:background .2s,transform .2s;white-space:nowrap;
}
.header-cta:hover{background:#fff;transform:translateY(-1px)}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:8px}
.burger span{width:24px;height:2px;background:#fff;display:block;transition:.3s}

/* ============================================================
   HERO BANNER (rolável)
   ============================================================ */
.banner{position:relative;background:var(--navy-900);overflow:hidden}
.banner-track{display:flex;transition:transform .7s cubic-bezier(.7,.01,.2,1)}
.slide{min-width:100%;position:relative}
.slide-grid{
  display:grid;grid-template-columns:1.05fr .95fr;align-items:stretch;
  min-height:min(78vh,720px);
}
.slide-copy{
  padding:clamp(40px,6vw,84px) var(--gut);
  display:flex;flex-direction:column;justify-content:center;gap:26px;
  background:
    linear-gradient(180deg,var(--navy-800),var(--navy-900));
  position:relative;
}
.slide-copy::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--line-light) 1px,transparent 1px);
  background-size:100% 56px;opacity:.5;mask-image:linear-gradient(90deg,#000,transparent 60%);
}
.slide-index{
  font-family:var(--mono);font-size:13px;letter-spacing:.2em;color:rgba(255,255,255,.5);
  display:flex;align-items:center;gap:14px;position:relative;
}
.slide-index b{color:var(--yellow);font-weight:600}
.slide-index .ln{flex:1;max-width:120px;height:1px;background:var(--line-light)}
.slide-title{
  font-family:var(--display);font-weight:800;color:#fff;
  font-size:clamp(40px,7.2vw,92px);line-height:.92;letter-spacing:-.015em;position:relative;
}
.slide-title .hl{color:var(--yellow);display:block}
.slide-sub{
  font-size:clamp(15px,1.5vw,18px);line-height:1.6;color:rgba(255,255,255,.74);
  max-width:46ch;position:relative;
}
.slide-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;position:relative}
.btn-solid{
  font-family:var(--head);font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  background:var(--yellow);color:var(--navy-900);padding:16px 30px;display:inline-flex;align-items:center;gap:10px;
  border:0;transition:transform .2s,background .2s;
}
.btn-solid:hover{background:#fff;transform:translateY(-2px)}
.btn-ghost{
  font-family:var(--head);font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:#fff;padding:16px 28px;border:1px solid var(--line-light);display:inline-flex;align-items:center;gap:10px;
  transition:border-color .2s,background .2s;
}
.btn-ghost:hover{border-color:var(--yellow);background:rgba(237,205,31,.08)}

.slide-media{position:relative;overflow:hidden;background:var(--navy-700)}
.slide-media img{width:100%;height:100%;object-fit:cover;filter:saturate(.85) contrast(1.05)}
.slide-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(115deg,rgba(6,34,63,.78) 0%,rgba(6,34,63,.22) 42%,rgba(6,34,63,.05) 100%);
}
.slide-media .frame-meta{
  position:absolute;left:22px;bottom:20px;z-index:2;
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:rgba(255,255,255,.78);
  display:flex;gap:14px;
}
.slide-media .frame-meta span{border-left:2px solid var(--yellow);padding-left:8px}

/* ferro placeholder */
.ph-ferro{
  width:100%;height:100%;
  background:
    repeating-linear-gradient(45deg,#0A2C50 0 18px,#0C3258 18px 36px);
  display:flex;align-items:center;justify-content:center;flex-direction:column;gap:14px;
  color:rgba(255,255,255,.62);font-family:var(--mono);font-size:13px;letter-spacing:.16em;text-align:center;
}
.ph-ferro .tag{border:1px dashed rgba(255,255,255,.4);padding:10px 18px}

/* banner controls */
.banner-ui{
  position:absolute;left:0;right:0;bottom:0;z-index:5;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px var(--gut);pointer-events:none;
}
.dots{display:flex;gap:10px;pointer-events:auto}
.dot{
  width:42px;height:4px;background:rgba(255,255,255,.25);border:0;padding:0;position:relative;overflow:hidden;
}
.dot.active{background:rgba(255,255,255,.35)}
.dot.active::after{
  content:"";position:absolute;inset:0;background:var(--yellow);transform-origin:left;
  animation:fill 6s linear forwards;
}
.banner.paused .dot.active::after{animation-play-state:paused}
@keyframes fill{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.arrows{display:flex;gap:8px;pointer-events:auto}
.arrow{
  width:46px;height:46px;background:rgba(255,255,255,.08);border:1px solid var(--line-light);
  color:#fff;display:grid;place-items:center;transition:.2s;backdrop-filter:blur(4px);
}
.arrow:hover{background:var(--yellow);color:var(--navy-900);border-color:var(--yellow)}

/* marquee ticker under banner */
.ticker{background:var(--yellow);color:var(--navy-900);overflow:hidden;border-block:1px solid var(--navy-900)}
.ticker-track{display:flex;gap:0;white-space:nowrap;animation:scroll-x 26s linear infinite;will-change:transform}
.ticker-track span{
  font-family:var(--head);font-weight:800;font-size:14px;letter-spacing:.08em;text-transform:uppercase;
  padding:13px 26px;display:inline-flex;align-items:center;gap:26px;
}
.ticker-track span::after{content:"";width:7px;height:7px;background:var(--navy-900);transform:rotate(45deg)}
@keyframes scroll-x{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ============================================================
   SECTION SHELL
   ============================================================ */
section{position:relative}
.sec{padding-block:clamp(64px,9vw,128px)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:54px;flex-wrap:wrap}
.sec-head .left{display:flex;flex-direction:column;gap:16px}
.sec-idx{font-family:var(--mono);font-size:13px;letter-spacing:.2em;color:var(--muted)}
.sec-idx b{color:var(--yellow-deep)}
.sec-title{
  font-family:var(--display);font-weight:800;letter-spacing:-.01em;line-height:.98;
  font-size:clamp(32px,4.6vw,58px);color:var(--navy);
}
.sec-rule{height:2px;background:var(--line-strong);flex:1;min-width:60px;margin-bottom:14px}

.on-navy{background:var(--navy);color:#fff}
.on-navy .sec-title{color:#fff}
.on-navy .sec-idx{color:rgba(255,255,255,.55)}
.on-navy .sec-rule{background:var(--line-light)}
.on-concrete-2{background:var(--concrete-2)}

/* ============================================================
   PRODUTOS
   ============================================================ */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:2px;background:var(--line)}
.prod{
  background:var(--paper);display:flex;flex-direction:column;position:relative;
  transition:transform .3s ease, box-shadow .3s ease;
}
.prod:hover{transform:translateY(-6px);box-shadow:0 26px 50px -28px rgba(6,34,63,.5);z-index:2}
.prod-img{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--navy-700)}
.prod-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.prod:hover .prod-img img{transform:scale(1.06)}
.prod-num{
  position:absolute;top:12px;left:12px;z-index:2;
  font-family:var(--mono);font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--navy-900);
  background:var(--yellow);padding:5px 9px;
}
.prod-body{padding:24px 22px 26px;display:flex;flex-direction:column;gap:12px;flex:1;border-top:2px solid var(--navy)}
.prod-body h3{font-family:var(--head);font-weight:700;font-size:19px;line-height:1.15;color:var(--navy)}
.prod-body p{font-size:14.5px;line-height:1.55;color:var(--muted);flex:1}
.prod-link{
  font-family:var(--mono);font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  color:var(--navy);display:inline-flex;align-items:center;gap:8px;margin-top:6px;
}
.prod-link .ar{transition:transform .25s}
.prod:hover .prod-link .ar{transform:translateX(5px)}
.prod-link:hover{color:var(--yellow-deep)}

/* ============================================================
   QUEM SOMOS
   ============================================================ */
.about-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(36px,5vw,76px);align-items:center}
.about-copy{display:flex;flex-direction:column;gap:28px}
.about-copy .lead{font-size:clamp(16px,1.7vw,19px);line-height:1.7;color:#27313c}
.about-copy .lead b{color:var(--navy);font-weight:700}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:2px;background:var(--line);border:1px solid var(--line)}
.stat{background:var(--concrete-2);padding:22px 20px;display:flex;flex-direction:column;gap:8px;min-height:120px;justify-content:center}
.stat .big{font-family:var(--display);font-weight:800;font-size:40px;line-height:1;color:var(--navy)}
.stat .lbl{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);line-height:1.4}
.stat.accent{background:var(--navy)}
.stat.accent .lbl{color:rgba(255,255,255,.8)}
.stat.accent .mk{width:24px;height:3px;background:var(--yellow)}
.about-media{position:relative}
.about-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.about-media .badge{
  position:absolute;right:-14px;bottom:-14px;background:var(--yellow);color:var(--navy-900);
  font-family:var(--mono);font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  padding:12px 18px;
}

/* ============================================================
   OBRAS
   ============================================================ */
.obras-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.obra{position:relative;overflow:hidden;min-height:440px;display:flex;align-items:flex-end;background:var(--navy-800)}
.obra img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .7s ease;filter:saturate(.9)}
.obra::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,24,46,.1) 30%,rgba(4,24,46,.92))}
.obra:hover img{transform:scale(1.07)}
.obra-body{position:relative;z-index:2;padding:30px 28px;color:#fff;display:flex;flex-direction:column;gap:12px}
.obra-body .n{font-family:var(--mono);font-size:12px;letter-spacing:.18em;color:var(--yellow)}
.obra-body h3{font-family:var(--display);font-weight:800;font-size:30px;letter-spacing:-.01em}
.obra-body p{font-size:14.5px;line-height:1.55;color:rgba(255,255,255,.82);max-width:34ch}
.obra-body .more{
  font-family:var(--mono);font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  color:#fff;display:inline-flex;align-items:center;gap:8px;margin-top:4px;opacity:.9;
}
.obra-body .more:hover{color:var(--yellow)}
.obras-tag{
  margin-top:48px;display:flex;align-items:center;gap:24px;flex-wrap:wrap;
  border-top:1px solid var(--line-light);padding-top:34px;
}
.obras-tag .big{
  font-family:var(--display);font-weight:800;font-size:clamp(22px,2.8vw,38px);line-height:1.05;color:#fff;flex:1;min-width:280px;
}
.obras-tag .big em{color:var(--yellow);font-style:normal}

/* ============================================================
   REGIÕES
   ============================================================ */
.reg-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:0;border:1px solid var(--line);background:var(--paper)}
.reg-info{padding:clamp(30px,4vw,52px);display:flex;flex-direction:column;gap:22px;justify-content:center}
.reg-coord{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--muted);line-height:1.8}
.reg-coord b{color:var(--navy)}
.reg-chips{display:flex;flex-wrap:wrap;gap:8px}
.reg-chip{
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  border:1px solid var(--line-strong);padding:8px 14px;color:var(--navy);
}
.reg-map{position:relative;min-height:380px;background:var(--navy-700)}
.reg-map iframe{position:absolute;inset:0;width:100%;height:100%;border:0;filter:grayscale(.3) contrast(1.05)}

/* ============================================================
   CONTATO
   ============================================================ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,4vw,64px)}
.contact-info{display:flex;flex-direction:column;gap:34px}
.info-block h3{font-family:var(--head);font-weight:700;font-size:20px;color:#fff;margin-bottom:12px;display:flex;align-items:center;gap:12px}
.info-block h3::before{content:"";width:10px;height:10px;background:var(--yellow);transform:rotate(45deg)}
.info-block p{font-size:15px;line-height:1.7;color:rgba(255,255,255,.78)}
.info-block .phone{color:var(--yellow);font-family:var(--mono);font-weight:600;letter-spacing:.04em}
.whats{
  display:inline-flex;align-items:center;gap:12px;margin-top:6px;
  background:#25D366;color:#04231a;font-family:var(--head);font-weight:700;font-size:14px;letter-spacing:.04em;
  padding:14px 22px;transition:transform .2s,filter .2s;
}
.whats:hover{transform:translateY(-2px);filter:brightness(1.05)}
.whats svg{width:20px;height:20px}

.form{background:var(--concrete-2);padding:clamp(28px,3.5vw,44px);border-top:3px solid var(--yellow)}
.form .frow{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.field input,.field textarea{
  font-family:var(--body);font-size:15px;color:var(--ink);background:var(--paper);
  border:1px solid var(--line-strong);padding:13px 14px;transition:border-color .2s,box-shadow .2s;
}
.field input:focus,.field textarea:focus{outline:0;border-color:var(--navy);box-shadow:0 0 0 3px rgba(6,34,63,.1)}
.field textarea{resize:vertical;min-height:120px}
.form .full{margin-bottom:16px}
.form-submit{
  width:100%;font-family:var(--head);font-weight:700;font-size:14px;letter-spacing:.12em;text-transform:uppercase;
  background:var(--navy);color:#fff;border:0;padding:17px;transition:background .2s;
  display:flex;align-items:center;justify-content:center;gap:10px;
}
.form-submit:hover{background:var(--navy-900)}
.form-note{font-family:var(--mono);font-size:12px;color:var(--yellow-deep);margin-top:12px;min-height:16px}

/* social row */
.social{display:flex;gap:10px;margin-top:8px}
.social a{
  width:46px;height:46px;border:1px solid var(--line-light);display:grid;place-items:center;color:#fff;transition:.2s;
}
.social a:hover{background:var(--yellow);color:var(--navy-900);border-color:var(--yellow)}
.social svg{width:20px;height:20px}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{background:var(--navy-900);color:rgba(255,255,255,.6);border-top:1px solid var(--line-light)}
.footer-top{display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;padding-block:46px;border-bottom:1px solid var(--line-light)}
.footer-top img{height:52px}
.footer-nav{display:flex;flex-wrap:wrap;gap:6px 22px}
.footer-nav a{font-family:var(--head);font-size:12.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:rgba(255,255,255,.7)}
.footer-nav a:hover{color:var(--yellow)}
.footer-bot{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;padding-block:24px;font-family:var(--mono);font-size:12px;letter-spacing:.05em}
.footer-bot .badge-y{color:var(--yellow)}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}
.reveal.d2{transition-delay:.16s}
.reveal.d3{transition-delay:.24s}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1040px){
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .obras-grid{grid-template-columns:1fr}
  .obra{min-height:360px}
}
@media (max-width:880px){
  .nav,.header-cta{display:none}
  .burger{display:flex}
  .header-inner{height:72px}
  .slide-grid{grid-template-columns:1fr}
  .slide-media{min-height:300px;order:-1}
  .slide-copy{min-height:auto}
  .about-grid{grid-template-columns:1fr}
  .reg-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .about-media .badge{right:14px}
}
@media (max-width:560px){
  .prod-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr}
  .form .frow{grid-template-columns:1fr}
  .slide-title{font-size:clamp(34px,11vw,56px)}
}

/* mobile nav drawer */
.mnav{
  position:fixed;inset:0;z-index:80;background:var(--navy-900);
  display:flex;flex-direction:column;padding:30px var(--gut);gap:6px;
  transform:translateY(-100%);transition:transform .4s cubic-bezier(.7,0,.2,1);
}
.mnav.open{transform:none}
.mnav .mclose{align-self:flex-end;background:none;border:0;color:#fff;font-size:30px;line-height:1;padding:6px}
.mnav a{font-family:var(--display);font-weight:800;font-size:30px;color:#fff;padding:12px 0;border-bottom:1px solid var(--line-light)}
.mnav a:hover{color:var(--yellow)}