/* ==========================================================================
   Grupo SMM — 2026 overhaul design system
   Identity kept: brand red #cf2027, dark charcoal + white, Poppins.
   Self-contained (no Bootstrap/jQuery). Token-based, mobile-first.
   ========================================================================== */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Poppins:wght@300;400;500;600;700;800&display=swap');

:root{
  --red:#cf2027;
  --red-600:#b3171d;
  --red-glow:rgba(207,32,39,.35);
  --bg:#0e0e0f;
  --surface:#161616;
  --surface-2:#1c1c1e;
  --border:#2a2a2c;
  --text:#f4f4f5;
  --muted:#a6a6ad;
  --white:#ffffff;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --maxw:1200px;
  --radius:14px;
  --radius-sm:8px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:74px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Poppins',system-ui,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:64px 0}

/* ---- Typography ---------------------------------------------------------- */
h1,h2,h3,h4,h5{font-weight:700;line-height:1.12;letter-spacing:-.02em;color:var(--white);text-wrap:balance}
h1{font-size:clamp(2.2rem,5.2vw,3.9rem);font-weight:800}
h2{font-size:clamp(1.7rem,3.6vw,2.6rem)}
h3{font-size:clamp(1.2rem,2vw,1.5rem)}
p{color:var(--muted)}
.lead{font-size:1.12rem;color:#d6d6da}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.78rem;font-weight:600;letter-spacing:.22em;text-transform:uppercase;
  color:var(--red);margin-bottom:18px;
}
.eyebrow::before{content:"";width:30px;height:2px;background:var(--red)}

.section-head{max-width:720px;margin-bottom:54px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head.center .eyebrow{justify-content:center}

/* ---- Buttons ------------------------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-weight:600;font-size:.98rem;
  padding:14px 30px;border-radius:var(--radius-sm);
  border:1px solid transparent;cursor:pointer;
  transition:transform .25s var(--ease),background .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.btn--primary{background:var(--red);color:#fff;box-shadow:0 10px 30px var(--red-glow)}
.btn--primary:hover{background:var(--red-600);transform:translateY(-3px);box-shadow:0 16px 40px var(--red-glow)}
.btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.28)}
.btn--ghost:hover{border-color:#fff;background:rgba(255,255,255,.06);transform:translateY(-3px)}
.btn--lg{padding:16px 38px;font-size:1.05rem}

/* ---- Navbar -------------------------------------------------------------- */
.nav{
  position:sticky;top:0;z-index:1000;
  height:var(--nav-h);
  background:#121213;                 /* solid charcoal (handshake: glare-readable) */
  border-bottom:1px solid var(--border);
  transition:box-shadow .3s var(--ease);
}
.nav.scrolled{box-shadow:0 10px 30px rgba(0,0,0,.5)}
.nav__inner{height:100%;display:flex;align-items:center;justify-content:space-between}
.nav__brand img{height:42px;width:auto}
.nav__links{display:flex;align-items:center;gap:6px}
.nav__links a{
  position:relative;font-weight:500;font-size:.95rem;color:#d9d9de;
  padding:10px 16px;border-radius:8px;transition:color .2s var(--ease),background .2s var(--ease);
}
.nav__links a:hover{color:#fff;background:rgba(255,255,255,.05)}
.nav__links a.active{color:#fff}
.nav__links a.active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:4px;height:2px;background:var(--red);border-radius:2px;
}
.nav__cta{margin-left:8px}
.nav__toggle{display:none;background:none;border:0;color:#fff;cursor:pointer;padding:8px}
.nav__toggle span{display:block;width:24px;height:2px;background:#fff;margin:5px 0;transition:.3s var(--ease)}
.nav__toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav__toggle.open span:nth-child(2){opacity:0}
.nav__toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---- Hero ---------------------------------------------------------------- */
.hero{position:relative;min-height:calc(100vh - var(--nav-h));display:flex;align-items:center;overflow:hidden}
.hero__media{position:absolute;inset:0;z-index:0}
.hero__media video{width:100%;height:100%;object-fit:cover}
.hero__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(8,8,9,.94) 0%,rgba(8,8,9,.82) 38%,rgba(8,8,9,.5) 70%,rgba(8,8,9,.7) 100%);
}
.hero__inner{position:relative;z-index:2;padding:80px 0;max-width:760px}
.hero h1{margin-bottom:22px}
.hero h1 .accent{color:var(--red)}
.hero__sub{font-size:1.18rem;color:#d6d6da;max-width:560px;margin-bottom:34px}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:48px}
.hero__trust{display:flex;align-items:center;gap:26px;flex-wrap:wrap;padding-top:30px;border-top:1px solid rgba(255,255,255,.12)}
.hero__trust .label{font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
.hero__trust img{height:26px;width:auto;opacity:.85;filter:brightness(0) invert(1)}
.hero__trust .iso{height:46px;filter:none;opacity:1}

/* page hero (interior pages, no video) */
.pagehero{position:relative;padding:120px 0 84px;background:
  radial-gradient(900px 420px at 12% -10%,rgba(207,32,39,.16),transparent 60%),
  linear-gradient(180deg,#141415,#0e0e0f);
  border-bottom:1px solid var(--border)}
.pagehero::before{        /* engineering blueprint hairline grid (frontier accent, low risk) */
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:linear-gradient(180deg,#000,transparent);mask-image:linear-gradient(180deg,#000,transparent);
}
.pagehero>.container{position:relative;z-index:1}
.pagehero h1{margin-bottom:16px}
.pagehero p{max-width:640px;font-size:1.1rem}

/* Hero video pause/play control (WCAG 2.2.2 Pause, Stop, Hide) */
.hero__pause{
  position:absolute;right:22px;bottom:22px;z-index:3;
  width:44px;height:44px;border-radius:50%;cursor:pointer;
  background:rgba(8,8,9,.55);border:1px solid rgba(255,255,255,.25);color:#fff;
  display:flex;align-items:center;justify-content:center;
  transition:background .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease);
}
.hero__pause:hover{background:rgba(8,8,9,.8);border-color:#fff;transform:scale(1.06)}
.hero__pause svg{width:16px;height:16px;fill:#fff}
.hero__pause .ico-play{display:none}
.hero__pause.paused .ico-pause{display:none}
.hero__pause.paused .ico-play{display:block}

/* ---- Stats band ---------------------------------------------------------- */
.stats{background:var(--red);}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:46px 24px;text-align:center;border-right:1px solid rgba(255,255,255,.18)}
.stat:last-child{border-right:0}
.stat__num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:clamp(2rem,3.4vw,2.8rem);font-weight:600;color:#fff;line-height:1;letter-spacing:-.03em}
.stat__label{margin-top:10px;font-size:.86rem;color:rgba(255,255,255,.9);font-weight:500}

/* ---- Alternating feature blocks ----------------------------------------- */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.feature + .feature{margin-top:96px}
.feature--rev .feature__media{order:2}
.feature__media{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border)}
.feature__media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.feature__body p + p{margin-top:16px}
.feature__body .btn{margin-top:28px}

/* ---- Service cards (home) ------------------------------------------------ */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.svc-card{
  position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);
  min-height:320px;display:flex;align-items:flex-end;
  transition:transform .35s var(--ease),border-color .35s var(--ease);
}
.svc-card:hover{transform:translateY(-6px);border-color:var(--red)}
.svc-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.svc-card:hover img{transform:scale(1.06)}
.svc-card__overlay{
  position:relative;z-index:2;width:100%;padding:28px;
  background:linear-gradient(0deg,rgba(8,8,9,.94) 0%,rgba(8,8,9,.5) 60%,transparent 100%);
}
.svc-card__overlay h3{margin-bottom:6px}
.svc-card__overlay p{font-size:.92rem;margin-bottom:14px}
.svc-card__link{color:var(--red);font-weight:600;font-size:.9rem;display:inline-flex;gap:8px;align-items:center}
.svc-card:hover .svc-card__link{gap:12px}

/* ---- Capability summary module (service pages) -------------------------- */
.capsule{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:14px;
}
.cap{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;transition:border-color .3s var(--ease),transform .3s var(--ease)}
.cap:hover{border-color:var(--red);transform:translateY(-4px)}
.cap__k{font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.cap__v{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:1.3rem;font-weight:600;color:#fff;line-height:1.2;letter-spacing:-.02em}
.cap__v small{font-family:'Poppins',sans-serif}
.cap__v small{display:block;font-size:.82rem;font-weight:400;color:var(--muted);margin-top:6px}

/* ---- Gallery ------------------------------------------------------------- */
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.gallery img{border-radius:var(--radius-sm);aspect-ratio:4/3;object-fit:cover;width:100%;border:1px solid var(--border);transition:transform .4s var(--ease)}
.gallery img:hover{transform:scale(1.03)}

/* ---- Spec table ---------------------------------------------------------- */
.tablecard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.spec-table{width:100%;border-collapse:collapse;font-size:.95rem}
.spec-table thead th{background:var(--red);color:#fff;font-weight:600;text-align:left;padding:16px 22px;letter-spacing:.03em;font-size:.82rem;text-transform:uppercase}
.spec-table tbody td,.spec-table tbody th{padding:14px 22px;text-align:left;font-weight:400;color:#d7d7db;border-top:1px solid var(--border)}
.spec-table tbody th{color:var(--red);font-weight:700;width:64px;font-family:var(--mono);font-variant-numeric:tabular-nums}
.spec-table tbody td:last-child{font-family:var(--mono);font-variant-numeric:tabular-nums;color:#fff;letter-spacing:-.01em}
.spec-table tbody tr{transition:background .2s var(--ease)}
.spec-table tbody tr:nth-child(even){background:rgba(255,255,255,.018)}
.spec-table tbody tr:hover{background:rgba(207,32,39,.08)}

/* ---- Treatment chips ----------------------------------------------------- */
.chips{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.chip{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 20px;transition:border-color .25s var(--ease),transform .25s var(--ease)}
.chip:hover{border-color:var(--red);transform:translateX(4px)}
.chip::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--red);flex:none}
.chip span{font-weight:500;color:#e6e6ea;font-size:.96rem}

/* ---- Furnace cards ------------------------------------------------------- */
.furnace-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}
.furnace{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);aspect-ratio:4/3;display:flex;align-items:flex-end;transition:transform .35s var(--ease),border-color .35s var(--ease)}
.furnace:hover{transform:translateY(-6px);border-color:var(--red)}
.furnace img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.furnace:hover img{transform:scale(1.06)}
.furnace__cap{position:relative;z-index:2;width:100%;padding:22px;background:linear-gradient(0deg,rgba(8,8,9,.95),rgba(8,8,9,.35) 65%,transparent)}
.furnace__cap h5{font-size:1.02rem;color:#fff;margin-bottom:4px}
.furnace__cap span{font-size:.85rem;color:var(--muted)}

/* ---- Quote / CEO --------------------------------------------------------- */
.quote-block{display:grid;grid-template-columns:1.4fr 1fr;gap:0;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border)}
.quote-block__text{background:var(--red);padding:54px;display:flex;flex-direction:column;justify-content:center}
.quote-block__text .q{font-size:1.5rem;font-weight:600;font-style:italic;color:#fff;line-height:1.4;margin-bottom:24px}
.quote-block__text .src{color:#fff}
.quote-block__text .src strong{display:block;font-size:1.05rem}
.quote-block__text .src span{color:rgba(255,255,255,.85);font-size:.9rem}
.quote-block__img{position:relative;min-height:340px}
.quote-block__img img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}

/* ---- Clients band -------------------------------------------------------- */
.clients{text-align:center}
.clients__logos{display:flex;align-items:center;justify-content:center;gap:60px;flex-wrap:wrap;margin-top:30px}
.clients__logos img{height:40px;width:auto;opacity:.7;filter:grayscale(1) brightness(0) invert(1);transition:opacity .3s var(--ease)}
.clients__logos img:hover{opacity:1}

/* ---- Contact ------------------------------------------------------------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:start}
.field{margin-bottom:18px}
.field label{display:block;font-size:.82rem;color:var(--muted);margin-bottom:8px;font-weight:500}
.field input,.field textarea{
  width:100%;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);
  color:#fff;padding:14px 16px;font-family:inherit;font-size:.98rem;transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--red);box-shadow:0 0 0 3px var(--red-glow)}
.field textarea{resize:vertical;min-height:140px}
.info-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:34px}
.info-row{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--border)}
.info-row:last-child{border-bottom:0}
.info-row .ic{width:42px;height:42px;border-radius:10px;background:rgba(207,32,39,.14);color:var(--red);display:flex;align-items:center;justify-content:center;flex:none;font-size:1.1rem}
.info-row .k{font-size:.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.1em}
.info-row .v{color:#fff;font-weight:500}

/* ---- CTA strip ----------------------------------------------------------- */
.cta{background:linear-gradient(120deg,#141415,#0e0e0f);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.cta__inner{display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.cta h2{max-width:620px}

/* ---- Footer -------------------------------------------------------------- */
.footer{background:#0a0a0b;border-top:1px solid var(--border);padding:64px 0 30px}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:44px}
.footer__brand img{height:46px;margin-bottom:18px}
.footer__brand p{max-width:300px;font-size:.92rem}
.footer h4{font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:18px;font-weight:600}
.footer__col a,.footer__col li{display:block;color:#c7c7cd;padding:6px 0;font-size:.95rem;transition:color .2s var(--ease)}
.footer__col a:hover{color:var(--red)}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding-top:24px;border-top:1px solid var(--border)}
.footer__bottom p{font-size:.85rem;color:#76767d}
.footer__bottom .soc{display:flex;gap:12px}
.footer__bottom .soc a{width:38px;height:38px;border-radius:9px;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;transition:border-color .25s var(--ease),background .25s var(--ease)}
.footer__bottom .soc a:hover{border-color:var(--red);background:rgba(207,32,39,.1)}
.footer__bottom .soc img{height:18px;filter:brightness(0) invert(1)}

/* ---- Reveal animation ---------------------------------------------------- */
.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---- Responsive ---------------------------------------------------------- */
@media (max-width:900px){
  .section{padding:68px 0}
  .nav__links{
    position:fixed;inset:var(--nav-h) 0 auto 0;flex-direction:column;align-items:stretch;gap:0;
    background:#121213;border-bottom:1px solid var(--border);padding:10px 16px 18px;
    transform:translateY(-130%);transition:transform .35s var(--ease);max-height:calc(100vh - var(--nav-h));overflow:auto;
  }
  .nav__links.open{transform:none}
  .nav__links a{padding:14px 12px;border-radius:8px}
  .nav__links a.active::after{display:none}
  .nav__cta{margin:8px 0 0}
  .nav__toggle{display:block}
  .feature,.quote-block,.contact-grid{grid-template-columns:1fr;gap:32px}
  .feature--rev .feature__media{order:0}
  .feature + .feature{margin-top:60px}
  .svc-grid{grid-template-columns:1fr}
  .stats__grid{grid-template-columns:1fr 1fr}
  .stat:nth-child(2){border-right:0}
  .stat{border-bottom:1px solid rgba(255,255,255,.18)}
  .capsule{grid-template-columns:1fr 1fr}
  .quote-block__text{padding:36px}
  .cta__inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .stats__grid,.capsule{grid-template-columns:1fr}
  .stat{border-right:0}
  .hero__trust{gap:18px}
}