:root{
  --graphite:#0D1317;
  --graphite-2:#141C21;
  --graphite-3:#1C262C;
  --linen:#E9EAE5;
  --linen-2:#F4F5F1;
  --copper:#B87333;
  --copper-lo:#8F5A28;
  --live:#F0A81C;
  --ink:#0A0F12;
  --mute:#8FA0A8;
  --rule:rgba(233,234,229,.14);
  --rule-dark:rgba(13,19,23,.14);
  --disp:"IBM Plex Sans Condensed",system-ui,sans-serif;
  --body:"IBM Plex Sans",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
  --max:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--graphite);
  color:var(--linen);
  font-family:var(--body);
  font-size:16.5px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--live);outline-offset:3px}

.wrap{max-width:var(--max);margin:0 auto;padding:0 26px}

/* ── labels / eyebrows ─────────────────────────── */
.eyebrow{
  font-family:var(--mono);font-size:11px;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;color:var(--copper);
  display:flex;align-items:center;gap:11px;margin-bottom:20px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--copper);flex:none}
.eyebrow.on-light{color:var(--copper-lo)}
.eyebrow.on-light::before{background:var(--copper-lo)}

h1,h2,h3,h4{font-family:var(--disp);font-weight:700;line-height:1.05;letter-spacing:-.01em}
h2{font-size:clamp(30px,4.4vw,50px);text-transform:uppercase;letter-spacing:.005em}
h3{font-size:20px;text-transform:uppercase;letter-spacing:.02em}

/* ── header ────────────────────────────────────── */
header{
  position:sticky;top:0;z-index:60;
  background:rgba(13,19,23,.9);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--rule);
}
.bar{max-width:var(--max);margin:0 auto;padding:0 26px;height:64px;
  display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:baseline;gap:10px;font-family:var(--disp);
  font-size:17px;text-transform:uppercase;letter-spacing:.09em}
.brand span{font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--mute)}
nav.main{display:flex;gap:26px;font-family:var(--mono);font-size:11.5px;
  letter-spacing:.1em;text-transform:uppercase;color:var(--mute)}
nav.main a:hover{color:var(--live)}
.zap{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;
  border:1px solid var(--copper);color:var(--live);padding:9px 15px;
  transition:background .18s,color .18s;white-space:nowrap;
}
.zap:hover{background:var(--copper);color:var(--ink)}
@media(max-width:860px){nav.main{display:none}}

/* ── hero ──────────────────────────────────────── */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--rule)}
.hero-grid{
  max-width:var(--max);margin:0 auto;padding:88px 26px 76px;
  display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center;
}
.hero h1{font-size:clamp(38px,5.6vw,70px);text-transform:uppercase}
.hero h1 em{font-style:normal;color:var(--live);display:block}
.lede{margin-top:24px;font-size:clamp(16.5px,1.5vw,19px);color:#C3CBCF;max-width:34em}
.hero-cta{display:flex;flex-wrap:wrap;gap:13px;margin-top:34px}
.btn{
  font-family:var(--mono);font-size:12px;letter-spacing:.11em;text-transform:uppercase;
  padding:14px 22px;border:1px solid transparent;transition:.18s;
}
.btn-solid{background:var(--live);color:var(--ink);font-weight:600}
.btn-solid:hover{background:var(--linen)}
.btn-ghost{border-color:var(--rule);color:var(--linen)}
.btn-ghost:hover{border-color:var(--live);color:var(--live)}

/* signature: diagrama unifilar (simbologia IEC 60617 / NBR 5444) */
.diagram{position:relative}
.diagram svg{width:100%;height:auto;overflow:visible}
.dcond{stroke:rgba(233,234,229,.30);stroke-width:1.5;fill:none;stroke-linecap:square}
.dbus{stroke:rgba(233,234,229,.55);stroke-width:5;fill:none;stroke-linecap:butt}
.dsym{stroke:rgba(233,234,229,.72);stroke-width:1.5;fill:none;
  stroke-linecap:round;stroke-linejoin:round}
.dfill{fill:var(--graphite)}
.dtxt{font-family:var(--mono);font-size:8px;letter-spacing:.08em;
  fill:rgba(233,234,229,.85);text-transform:uppercase}
.dtag{font-family:var(--mono);font-size:8.6px;letter-spacing:.12em;
  fill:var(--mute);text-transform:uppercase}
.dtag.hi{fill:var(--live)}

.dpulse{fill:none;stroke:var(--live);stroke-width:2.2;stroke-linecap:round;
  stroke-dasharray:13 100;stroke-dashoffset:113;
  animation:flow 4.4s linear infinite}
.dpulse.halo{stroke-width:7;opacity:.30;filter:url(#glow)}
@keyframes flow{from{stroke-dashoffset:113}to{stroke-dashoffset:0}}

.d1{animation-delay:0s}
.d2{animation-delay:.9s}
.d3{animation-delay:1.7s}
.d4{animation-delay:1.9s}
.d5{animation-delay:2.1s}
.d6{animation-delay:1.8s}

.dnode{fill:var(--live);opacity:0;animation:blip 4.4s ease-out infinite}
@keyframes blip{0%,72%{opacity:0}78%{opacity:.95}100%{opacity:0}}

@media(prefers-reduced-motion:reduce){
  .dpulse{animation:none;stroke-dasharray:none;stroke-dashoffset:0;opacity:.42}
  .dpulse.halo{display:none}
  .dnode{animation:none;opacity:.6}
}
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:44px;padding:64px 26px 60px}
  .diagram{order:-1;max-width:420px}
}

/* ── credential strip ──────────────────────────── */
.creds{background:var(--graphite-2);border-bottom:1px solid var(--rule)}
.creds-in{max-width:var(--max);margin:0 auto;padding:0 26px;
  display:grid;grid-template-columns:repeat(4,1fr)}
.cred{padding:26px 22px 26px 0;border-right:1px solid var(--rule)}
.cred:last-child{border-right:0}
.cred b{display:block;font-family:var(--disp);font-size:26px;letter-spacing:.01em}
.cred small{font-family:var(--mono);font-size:10.5px;letter-spacing:.13em;
  text-transform:uppercase;color:var(--mute)}
@media(max-width:780px){
  .creds-in{grid-template-columns:1fr 1fr}
  .cred:nth-child(2){border-right:0}
  .cred:nth-child(-n+2){border-bottom:1px solid var(--rule)}
}

/* ── generic section ───────────────────────────── */
.sec{padding:96px 0}
.sec.light{background:var(--linen);color:var(--ink)}
.sec.light .lede{color:#3C4750}
.sec-head{max-width:640px;margin-bottom:52px}
.sec-head p{margin-top:18px;color:#B2BDC2}
.sec.light .sec-head p{color:#46525A}

/* ── two paths ─────────────────────────────────── */
.paths{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--rule-dark)}
.path{background:var(--linen-2);padding:40px 36px;position:relative;transition:background .2s}
.path:hover{background:#fff}
.path .who{font-family:var(--mono);font-size:10.5px;letter-spacing:.15em;
  text-transform:uppercase;color:var(--copper-lo)}
.path h3{margin:14px 0 14px;font-size:24px;color:var(--ink)}
.path p{color:#46525A;font-size:15.6px}
.path ul{list-style:none;margin:20px 0 26px}
.path li{padding:9px 0 9px 20px;border-top:1px solid var(--rule-dark);
  font-size:15px;color:#2C363D;position:relative}
.path li::before{content:"";position:absolute;left:0;top:18px;width:8px;height:1px;background:var(--copper)}
.path .go{font-family:var(--mono);font-size:11.5px;letter-spacing:.11em;
  text-transform:uppercase;color:var(--ink);border-bottom:1px solid var(--copper);padding-bottom:3px}
.path .go:hover{color:var(--copper-lo)}
@media(max-width:820px){.paths{grid-template-columns:1fr}}

/* ── service blocks ───────────────────────────── */
.blocks{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule)}
.block{background:var(--graphite-2);padding:32px 28px 30px;position:relative;transition:background .2s}
.block:hover{background:var(--graphite-3)}
.block .code{font-family:var(--mono);font-size:10.5px;letter-spacing:.15em;
  color:var(--live);text-transform:uppercase}
.block h3{margin:16px 0 12px;font-size:18.5px}
.block p{font-size:15px;color:#A8B4BA}
.block .norm{margin-top:18px;font-family:var(--mono);font-size:10px;
  letter-spacing:.1em;color:var(--mute);text-transform:uppercase}
@media(max-width:980px){.blocks{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.blocks{grid-template-columns:1fr}}

/* ── EV feature ───────────────────────────────── */
.ev{display:grid;grid-template-columns:.92fr 1.08fr;gap:54px;align-items:start}
.ev-note{background:var(--graphite-2);border-left:2px solid var(--live);padding:24px 26px}
.ev-note .code{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;
  color:var(--live);text-transform:uppercase}
.ev-note p{margin-top:12px;font-size:15.4px;color:#B8C2C7}
.stack{display:flex;flex-direction:column;gap:1px;background:var(--rule)}
.row{background:var(--graphite-2);padding:24px 26px;display:grid;
  grid-template-columns:74px 1fr;gap:22px;align-items:baseline;transition:background .2s}
.row:hover{background:var(--graphite-3)}
.row .k{font-family:var(--mono);font-size:10.5px;letter-spacing:.13em;
  color:var(--copper);text-transform:uppercase;padding-top:4px}
.row h4{font-size:17.5px;text-transform:uppercase;letter-spacing:.02em}
.row p{margin-top:8px;font-size:14.8px;color:#A8B4BA}
@media(max-width:900px){.ev{grid-template-columns:1fr;gap:34px}}

/* ── fluxo (real sequence) ────────────────────── */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--rule-dark)}
.step{background:var(--linen-2);padding:30px 24px}
.step .n{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--copper-lo)}
.step h4{margin:14px 0 10px;font-size:16.5px;text-transform:uppercase;
  letter-spacing:.02em;color:var(--ink)}
.step p{font-size:14.6px;color:#46525A}
@media(max-width:980px){.flow{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.flow{grid-template-columns:1fr}}

/* ── trajetória ───────────────────────────────── */
.tl{border-top:1px solid var(--rule)}
.tl-row{display:grid;grid-template-columns:130px 1fr;gap:26px;
  padding:22px 0;border-bottom:1px solid var(--rule);align-items:baseline}
.tl-row .yr{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--live)}
.tl-row h4{font-size:17px;text-transform:uppercase;letter-spacing:.02em}
.tl-row p{margin-top:6px;font-size:14.8px;color:#A2AEB4}
@media(max-width:640px){.tl-row{grid-template-columns:1fr;gap:6px}}

/* ── artigos ──────────────────────────────────── */
.posts{border-top:1px solid var(--rule-dark)}
.post{display:grid;grid-template-columns:104px 1fr 30px;gap:22px;align-items:center;
  padding:22px 0;border-bottom:1px solid var(--rule-dark);transition:padding-left .2s}
.post:hover{padding-left:10px}
.post .tag{font-family:var(--mono);font-size:10.5px;letter-spacing:.13em;
  text-transform:uppercase;color:var(--copper-lo)}
.post h4{font-size:17.5px;text-transform:none;font-family:var(--body);
  font-weight:600;letter-spacing:0;color:var(--ink);line-height:1.4}
.post .arw{font-family:var(--mono);color:var(--copper-lo);text-align:right}
@media(max-width:640px){
  .post{grid-template-columns:1fr;gap:7px}
  .post .arw{display:none}
}

/* ── contato ──────────────────────────────────── */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:start}
.ways{display:flex;flex-direction:column;gap:1px;background:var(--rule)}
.way{background:var(--graphite-2);padding:22px 24px;display:flex;
  justify-content:space-between;align-items:center;gap:16px;transition:background .2s}
.way:hover{background:var(--graphite-3)}
.way .k{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--mute)}
.way .v{font-family:var(--disp);font-size:19px;letter-spacing:.02em}
.way:hover .v{color:var(--live)}
@media(max-width:900px){.contact{grid-template-columns:1fr;gap:34px}}

/* ── carimbo (ABNT title block) ───────────────── */
footer{border-top:1px solid var(--rule);background:var(--graphite-2);padding:0}
.stamp{max-width:var(--max);margin:0 auto}
.stamp-grid{display:grid;grid-template-columns:repeat(6,1fr);border-left:1px solid var(--rule)}
.cell{border-right:1px solid var(--rule);border-bottom:1px solid var(--rule);padding:16px 18px}
.cell.wide{grid-column:span 3}
.cell .k{font-family:var(--mono);font-size:9.2px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--mute);display:block;margin-bottom:6px}
.cell .v{font-family:var(--disp);font-size:15px;letter-spacing:.03em;text-transform:uppercase}
.cell .v.sm{font-family:var(--mono);font-size:12px;text-transform:none;letter-spacing:.02em}
.legal{padding:20px 26px 32px;font-family:var(--mono);font-size:10.6px;
  letter-spacing:.05em;color:var(--mute);line-height:1.9}
@media(max-width:860px){
  .stamp-grid{grid-template-columns:1fr 1fr}
  .cell.wide{grid-column:span 2}
}

/* reveal */
.rv{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}

/* ── chat widget flutuante ─────────────────────── */
.chat-fab{
  position:fixed;right:22px;bottom:22px;z-index:80;
  width:58px;height:58px;border-radius:50%;
  background:var(--live);border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 24px rgba(0,0,0,.35);
  transition:transform .18s ease;
}
.chat-fab:hover{transform:scale(1.06)}
.chat-fab svg{width:26px;height:26px}
.chat-fab .ring{
  position:absolute;inset:-6px;border-radius:50%;
  border:1.5px solid var(--live);opacity:0;
  animation:ping 2.6s ease-out infinite;
}
@keyframes ping{0%{opacity:.55;transform:scale(.85)}100%{opacity:0;transform:scale(1.35)}}
@media(prefers-reduced-motion:reduce){.chat-fab .ring{animation:none;display:none}}

.chat-pop{
  position:fixed;right:22px;bottom:92px;z-index:80;width:308px;
  background:var(--graphite-2);border:1px solid var(--rule);
  box-shadow:0 18px 44px rgba(0,0,0,.5);
  opacity:0;transform:translateY(10px) scale(.98);pointer-events:none;
  transition:opacity .18s ease,transform .18s ease;
}
.chat-pop.open{opacity:1;transform:none;pointer-events:auto}
.chat-pop .head{
  background:var(--copper-lo);padding:14px 16px;
  display:flex;align-items:center;gap:10px;
}
.chat-pop .head .dot{width:8px;height:8px;border-radius:50%;background:#3ED598;flex:none}
.chat-pop .head b{font-family:var(--disp);font-size:14.5px;letter-spacing:.02em;text-transform:uppercase}
.chat-pop .head small{display:block;font-family:var(--mono);font-size:9.5px;color:rgba(255,255,255,.75);letter-spacing:.05em}
.chat-pop .body{padding:16px}
.chat-pop .bubble{
  background:var(--graphite-3);padding:12px 13px;font-size:13.6px;
  color:#C3CBCF;line-height:1.55;margin-bottom:14px;
}
.chat-pop .quick{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  width:100%;text-align:left;background:transparent;
  border:1px solid var(--rule);color:var(--linen);font-size:13px;
  padding:11px 13px;margin-bottom:8px;cursor:pointer;transition:.15s;
  font-family:var(--body);
}
.chat-pop .quick:last-child{margin-bottom:0}
.chat-pop .quick::after{
  content:"↗";font-family:var(--mono);color:var(--live);
  flex:none;font-size:13px;
}
.chat-pop .quick:hover{border-color:var(--live);background:rgba(240,168,28,.08)}
@media(max-width:400px){.chat-pop{right:12px;left:12px;width:auto;bottom:88px}}

/* ── artigo: tipografia de leitura ─────────────────────── */
.article-hero{border-bottom:1px solid var(--rule);padding:64px 0 52px}
.article-hero .meta{display:flex;gap:14px;align-items:center;margin-bottom:22px;
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--mute)}
.article-hero .meta .tag{color:var(--live)}
.article-hero h1{font-size:clamp(30px,4.4vw,46px);text-transform:none;letter-spacing:-.01em;max-width:20em}
.article-hero .dek{margin-top:20px;font-size:18px;color:#C3CBCF;max-width:38em}

.prose{max-width:680px;margin:0 auto;padding:64px 26px 40px}
.prose h2{font-size:23px;text-transform:none;letter-spacing:0;margin:44px 0 16px;color:var(--linen)}
.prose h3{font-size:18px;text-transform:none;letter-spacing:0;margin:32px 0 12px;color:var(--linen)}
.prose p{font-size:16.5px;line-height:1.75;color:#C3CBCF;margin-bottom:20px}
.prose ul,.prose ol{margin:0 0 22px 22px;color:#C3CBCF}
.prose li{font-size:16.5px;line-height:1.7;margin-bottom:10px;padding-left:4px}
.prose strong{color:var(--linen);font-weight:600}
.prose blockquote{border-left:2px solid var(--copper);padding:4px 0 4px 20px;margin:28px 0;
  color:#B0BAC0;font-size:16px;font-style:normal}
.prose .callout{background:var(--graphite-2);border-left:2px solid var(--live);
  padding:18px 22px;margin:30px 0;font-size:15.2px;color:#B8C2C7}
.prose .callout b{color:var(--live);display:block;margin-bottom:6px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.13em;text-transform:uppercase}
.prose hr{border:none;border-top:1px solid var(--rule);margin:40px 0}

.article-cta{max-width:680px;margin:0 auto;padding:0 26px 80px}
.article-cta .box{background:var(--graphite-2);border:1px solid var(--rule);padding:32px 30px}
.article-cta h3{font-size:19px;text-transform:none;letter-spacing:0;margin-bottom:10px;color:var(--linen)}
.article-cta p{font-size:15px;color:#A8B4BA;margin-bottom:20px}

.back-link{max-width:680px;margin:0 auto;padding:28px 26px 0;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--mute)}
.back-link:hover{color:var(--live)}

.related{border-top:1px solid var(--rule);padding:56px 0 90px}
.related .wrap>span{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--copper);display:block;margin-bottom:24px}