/* Steeltec Engenharia — design system BMF (base: stripe) */
:root{
  --ink:#0d253d; --ink-2:#273951; --ink-mute:#64748d;
  --canvas:#fff; --canvas-soft:#f6f9fc; --canvas-deep:#0a1c2e;
  --hairline:#e3e8ee;
  --brand:#e87b30; --brand-deep:#c9611c; --brand-soft:#fdf0e6;
  --wa:#25d366;
  --max:1140px; --radius:8px;
  --shadow-sm:0 1px 2px rgba(13,37,61,.06),0 1px 3px rgba(13,37,61,.08);
  --shadow-md:0 4px 6px -1px rgba(13,37,61,.07),0 12px 20px -8px rgba(13,37,61,.14);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  color:var(--ink-2);background:var(--canvas);line-height:1.65;font-size:16px;
  font-feature-settings:'ss01';-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* tipografia display — pesos leves, tracking negativo (stripe) */
h1,h2,h3,h4{color:var(--ink);font-weight:300;letter-spacing:-.02em;line-height:1.12}
h1{font-size:clamp(2rem,4.6vw,3.25rem)}
h2{font-size:clamp(1.55rem,3vw,2.15rem);margin-bottom:.6em}
h3{font-size:1.22rem;font-weight:400;letter-spacing:-.01em}
p{margin-bottom:1.1em}
strong{font-weight:600;color:var(--ink)}
.eyebrow{font-size:.775rem;font-weight:600;letter-spacing:.11em;text-transform:uppercase;color:var(--brand)}
.lead{font-size:1.09rem;color:var(--ink-mute)}

/* header */
.topbar{background:var(--canvas-deep);color:#cfe0f0;font-size:.82rem}
.topbar .wrap{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;padding-block:8px}
.topbar a:hover{color:#fff}
.hdr{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--hairline)}
.hdr .wrap{display:flex;align-items:center;gap:24px;min-height:70px}
.marca{display:flex;align-items:center;gap:11px;flex-shrink:0}
.marca img{width:34px;height:37px}
.marca b{display:block;color:var(--ink);font-size:1.06rem;font-weight:600;letter-spacing:-.02em;line-height:1.1}
.marca span{display:block;font-size:.66rem;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-mute)}
.nav{display:flex;gap:26px;margin-left:auto;align-items:center}
.nav a{font-size:.92rem;color:var(--ink-2);padding:6px 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a[aria-current=page]{color:var(--ink);border-bottom-color:var(--brand)}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--hairline);
  border-radius:6px;padding:9px 12px;font-size:1rem;cursor:pointer;color:var(--ink)}

/* botoes — pill de raio curto (stripe) */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:500;font-size:.97rem;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;transition:.16s;cursor:pointer;line-height:1}
.btn-wa{background:var(--wa);color:#fff}
.btn-wa:hover{background:#1eb958;transform:translateY(-1px)}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:var(--brand-deep);transform:translateY(-1px)}
.btn-ghost{border-color:var(--hairline);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--ink-mute)}
.btn-sm{padding:9px 17px;font-size:.88rem}

/* hero */
.hero{background:linear-gradient(168deg,#f6f9fc 0%,#eef4fa 46%,#fff 100%);
  border-bottom:1px solid var(--hairline);padding:clamp(44px,7vw,84px) 0}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:clamp(28px,5vw,60px);align-items:center}
.hero h1{margin:.35em 0 .5em}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.hero-img{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-md);aspect-ratio:4/5}
.hero-img img{width:100%;height:100%;object-fit:cover;object-position:50% 30%}

/* provas / numeros */
.provas{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:34px;
  padding-top:26px;border-top:1px solid var(--hairline)}
.prova b{display:block;font-size:1.65rem;font-weight:300;color:var(--ink);letter-spacing:-.03em}
.prova span{font-size:.83rem;color:var(--ink-mute)}

/* secoes */
section{padding:clamp(46px,6.5vw,80px) 0}
.soft{background:var(--canvas-soft);border-block:1px solid var(--hairline)}
.sec-head{max-width:660px;margin-bottom:38px}

/* cards */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--hairline);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow-sm);transition:.18s}
.card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:#d3dde8}
.card h3{margin-bottom:.5em}
.card h2{font-size:1.22rem;font-weight:400;letter-spacing:-.01em;margin-bottom:.5em}
.card p{font-size:.95rem;color:var(--ink-mute);margin-bottom:.8em}
.card .mais{font-size:.9rem;color:var(--brand);font-weight:500}
.ico{width:42px;height:42px;border-radius:9px;background:var(--brand-soft);
  display:grid;place-items:center;margin-bottom:15px}
.ico svg{width:22px;height:22px;stroke:var(--brand-deep);fill:none;stroke-width:1.6}

/* projetos */
.proj{border:1px solid var(--hairline);border-radius:var(--radius);overflow:hidden;background:#fff}
.proj-img{aspect-ratio:4/3;overflow:hidden;background:var(--canvas-soft)}
.proj-img img{width:100%;height:100%;object-fit:cover;transition:.3s}
.proj:hover .proj-img img{transform:scale(1.04)}
.proj-txt{padding:18px 20px}
.proj-txt b{display:block;color:var(--ink);font-weight:600;font-size:.98rem;margin-bottom:3px}
.proj-txt span{font-size:.87rem;color:var(--ink-mute)}
.galeria{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.galeria img{border-radius:6px;aspect-ratio:4/3;object-fit:cover;border:1px solid var(--hairline)}

/* tldr / destaque */
.tldr{background:var(--brand-soft);border-left:3px solid var(--brand);
  border-radius:0 var(--radius) var(--radius) 0;padding:18px 22px;margin:26px 0;font-size:1rem}
.tldr strong{color:var(--brand-deep)}
.nota{background:var(--canvas-soft);border:1px solid var(--hairline);
  border-radius:var(--radius);padding:20px 24px;margin:26px 0}

/* conteudo longo */
.prosa{max-width:760px}
.prosa h2{margin-top:1.7em}
.prosa h3{margin:1.5em 0 .5em}
.prosa ul,.prosa ol{margin:0 0 1.2em 1.15em}
.prosa li{margin-bottom:.5em}
.prosa a:not(.btn){color:var(--brand-deep);text-decoration:underline;text-underline-offset:2px}

/* faq */
.faq details{border-bottom:1px solid var(--hairline);padding:16px 0}
.faq summary{font-weight:500;color:var(--ink);cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;gap:16px;font-size:1.02rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--brand);font-size:1.35rem;line-height:1;flex-shrink:0}
.faq details[open] summary::after{content:"\2212"}
.faq p{margin:12px 0 0;color:var(--ink-mute);font-size:.96rem}

/* breadcrumb */
.crumb{font-size:.84rem;color:var(--ink-mute);padding:16px 0}
.crumb a:hover{color:var(--brand-deep);text-decoration:underline}

/* byline */
.byline{display:flex;gap:16px;flex-wrap:wrap;align-items:center;font-size:.86rem;
  color:var(--ink-mute);padding:14px 0;border-block:1px solid var(--hairline);margin-bottom:28px}
.byline strong{color:var(--ink)}
.cred{background:var(--brand-soft);color:var(--brand-deep);font-weight:600;
  padding:2px 9px;border-radius:4px;font-size:.78rem}

/* cta faixa */
.cta-faixa{background:var(--canvas-deep);color:#e6eef7;text-align:center}
.cta-faixa h2{color:#fff}
.cta-faixa p{color:#a9c0d6;max-width:560px;margin:0 auto 26px}

/* footer */
.ft{background:var(--canvas-deep);color:#a9c0d6;font-size:.9rem;padding:56px 0 0}
.ft-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:36px;padding-bottom:36px}
.ft h4{color:#fff;font-size:.79rem;letter-spacing:.11em;text-transform:uppercase;
  margin-bottom:14px;font-weight:600}
.ft a:hover{color:#fff;text-decoration:underline}
.ft ul{list-style:none}
.ft li{margin-bottom:8px}
.ft address{font-style:normal;line-height:1.8}
.ft .marca b{color:#fff}
.ft .marca span{color:#7d97b0}
.ia-links{border-top:1px solid rgba(255,255,255,.11);padding:20px 0;
  display:flex;gap:14px;flex-wrap:wrap;align-items:center;font-size:.83rem}
.ia-links a{color:#8fb3d4;border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:4px 13px}
.ia-links a:hover{color:#fff;border-color:#fff;text-decoration:none}
.ft-fim{border-top:1px solid rgba(255,255,255,.11);padding:18px 0;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:.83rem}

/* wa flutuante */
.wa-float{position:fixed;right:18px;bottom:18px;z-index:80;width:56px;height:56px;
  border-radius:50%;background:var(--wa);display:grid;place-items:center;
  box-shadow:0 6px 22px rgba(37,211,102,.42);transition:.16s}
.wa-float:hover{transform:scale(1.06)}
.wa-float svg{width:30px;height:30px;fill:#fff}

/* formulario */
.form-campo{margin-bottom:16px}
.form-campo label{display:block;font-size:.88rem;font-weight:500;color:var(--ink);margin-bottom:6px}
.form-campo input,.form-campo textarea,.form-campo select{width:100%;padding:11px 14px;
  border:1px solid #a8c3de;border-radius:6px;font:inherit;font-size:.95rem;color:var(--ink);background:#fff}
.form-campo textarea{min-height:120px;resize:vertical}
.form-campo input:focus,.form-campo textarea:focus,.form-campo select:focus{border-color:var(--brand)}

/* acessibilidade */
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;border-radius:3px}
.pular{position:absolute;left:-9999px}
.pular:focus{left:8px;top:8px;z-index:200;background:#fff;padding:10px 16px;
  border:2px solid var(--brand);border-radius:6px}

/* offscreen perf */
.tardio{content-visibility:auto;contain-intrinsic-size:1px 620px}

@media(max-width:900px){
  .hero-grid,.g3,.g2,.ft-grid{grid-template-columns:1fr}
  .hero-img{aspect-ratio:16/11;max-height:340px}
  .provas{grid-template-columns:repeat(2,1fr)}
  .nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;
    flex-direction:column;gap:0;padding:8px 24px 18px;border-bottom:1px solid var(--hairline);
    box-shadow:var(--shadow-md)}
  .nav.aberto{display:flex}
  .nav a{width:100%;padding:12px 0;border-bottom:1px solid var(--hairline)}
  .menu-btn{display:block}
  .ft-grid{gap:28px}
  .topbar{display:none}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}