/* ============================================================
   IEC — Impact Engineering & Contracting sarl
   Palette drawn from the monochrome steel logo:
   charcoal / iron / steel / paper, with marking-orange accent
   ============================================================ */
:root{
  --charcoal:#17191d;
  --iron:#23262c;
  --iron-2:#2e323a;
  --steel:#9aa1ab;
  --steel-dim:#6d747e;
  --line:#3a3f48;
  --paper:#f4f4f1;
  --paper-2:#ebebe6;
  --ink:#1d1f23;
  --accent:#e05a10;
  --white:#ffffff;
  --maxw:1180px;
  --font-display:"Barlow Condensed",sans-serif;
  --font-body:"Barlow",sans-serif;
  --font-mono:"IBM Plex Mono",monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}
body{
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  line-height:1.65;
  font-size:17px;
}
img{max-width:100%;display:block}
a{color:inherit}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- annotation label (drawing-style eyebrow) ---------- */
.anno{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--steel-dim);
  display:flex;
  align-items:center;
  gap:14px;
}
.anno::before{
  content:"";
  width:34px;height:1px;
  background:var(--accent);
  flex:none;
}
.on-dark .anno{color:var(--steel)}

/* ---------- header ---------- */
.site-header{
  background:var(--charcoal);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:50;
}
.site-header .wrap{
  display:flex;align-items:center;justify-content:space-between;
  height:104px;
}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none}
.brand img{height:76px;width:auto}
.brand-name{
  font-family:var(--font-display);
  font-weight:600;font-size:20px;letter-spacing:.06em;
  color:var(--white);text-transform:uppercase;line-height:1.1;
}
.brand-name small{
  display:block;font-family:var(--font-mono);font-weight:400;
  font-size:9.5px;letter-spacing:.22em;color:var(--steel);
}
.nav{display:flex;gap:6px}
.nav a{
  white-space:nowrap;
  font-family:var(--font-display);
  font-size:16.5px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--steel);text-decoration:none;
  padding:10px 14px;border-bottom:2px solid transparent;
  transition:color .15s;
}
.nav a:hover{color:var(--white)}
.nav a.active{color:var(--white);border-bottom-color:var(--accent)}
.nav-toggle{
  display:none;background:none;border:1px solid var(--line);
  color:var(--steel);font-family:var(--font-mono);font-size:12px;
  letter-spacing:.15em;padding:9px 14px;cursor:pointer;text-transform:uppercase;
}
:where(a,button,input,textarea):focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;
}

/* ---------- hero ---------- */
.hero{
  position:relative;background:var(--charcoal);color:var(--white);
  min-height:66vh;display:flex;align-items:flex-end;overflow:hidden;
}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.5}
.hero-scrim{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(23,25,29,.25) 0%,rgba(23,25,29,.55) 55%,rgba(23,25,29,.92) 100%);
}
.hero-inner{position:relative;padding:120px 0 64px;width:100%}
.hero h1{
  font-family:var(--font-display);
  font-weight:700;text-transform:uppercase;
  font-size:clamp(44px,7.5vw,92px);
  line-height:.96;letter-spacing:.01em;
  max-width:15ch;margin:18px 0 22px;
}
.hero p{max-width:56ch;color:#d8dade;font-size:18px}
.hero-cta{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}

/* page hero (interior pages) */
.page-hero{background:var(--charcoal);color:var(--white);padding:72px 0 54px;border-bottom:3px solid var(--accent)}
.page-hero h1{
  font-family:var(--font-display);font-weight:700;text-transform:uppercase;
  font-size:clamp(38px,5.5vw,64px);line-height:1;margin-top:16px;
}
.page-hero p{color:var(--steel);max-width:62ch;margin-top:14px;font-size:18px}

/* ---------- buttons ---------- */
.btn{
  display:inline-block;font-family:var(--font-display);
  font-size:17px;letter-spacing:.1em;text-transform:uppercase;
  text-decoration:none;padding:13px 26px;border:1px solid var(--steel-dim);
  color:var(--white);background:transparent;transition:background .15s,border-color .15s,color .15s;
}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn.solid{background:var(--accent);border-color:var(--accent);color:var(--white)}
.btn.solid:hover{background:#c74d0c;color:var(--white)}
.btn.dark{color:var(--ink);border-color:var(--ink)}
.btn.dark:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- sections ---------- */
.section{padding:84px 0}
.section.tint{background:var(--paper-2)}
.section.dark{background:var(--iron);color:var(--paper)}
.section h2{
  font-family:var(--font-display);font-weight:600;text-transform:uppercase;
  font-size:clamp(30px,4vw,44px);line-height:1.02;margin:14px 0 22px;
}
.lede{font-size:18.5px;max-width:66ch}
.cols-2{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.cols-2 .media img{width:100%;height:100%;object-fit:cover;border:1px solid #d6d6cf}
.stack>*+*{margin-top:16px}

/* stats strip */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);margin-top:56px;background:var(--charcoal);
}
.stat{padding:26px 22px;border-left:1px solid var(--line)}
.stat:first-child{border-left:none}
.stat b{
  font-family:var(--font-display);font-weight:700;font-size:42px;
  color:var(--white);display:block;line-height:1;
}
.stat span{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--steel);
}

/* ---------- services ---------- */
.svc-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:44px}
.svc{
  background:var(--white);border:1px solid #dcdcd4;border-top:3px solid var(--iron-2);
  padding:30px 30px 26px;transition:border-color .15s,transform .15s;
}
.svc:hover{border-top-color:var(--accent)}
.svc h3{
  font-family:var(--font-display);font-weight:600;font-size:25px;
  text-transform:uppercase;letter-spacing:.03em;margin-bottom:6px;
}
.svc .code{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  color:var(--steel-dim);text-transform:uppercase;
}
.svc ul{list-style:none;margin-top:16px}
.svc li{
  padding:9px 0 9px 22px;border-top:1px solid #ecece5;position:relative;
}
.svc li::before{
  content:"";position:absolute;left:0;top:17px;
  width:10px;height:2px;background:var(--accent);
}

/* ---------- projects ---------- */
.proj-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px;
}
.proj{
  position:relative;background:var(--charcoal);overflow:hidden;
  border:1px solid #d6d6cf;text-decoration:none;
}
.proj img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  transition:transform .35s,opacity .35s;opacity:.92;
}
.proj:hover img{transform:scale(1.04);opacity:1}
.proj figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:38px 18px 14px;
  background:linear-gradient(180deg,rgba(23,25,29,0),rgba(23,25,29,.88));
  color:var(--white);
  font-family:var(--font-display);font-size:19px;letter-spacing:.05em;
  text-transform:uppercase;line-height:1.15;
}

/* ---------- MEP design (numbered sequence) ---------- */
.mep{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:64px 0;border-top:1px solid #d9d9d1;
}
.mep:first-of-type{border-top:none}
.mep .num{
  font-family:var(--font-mono);font-size:13px;letter-spacing:.2em;
  color:var(--accent);
}
.mep h2{margin-top:10px}
.mep img{width:100%;border:1px solid #d6d6cf;background:var(--white)}
.mep:nth-of-type(even) .media{order:-1}

/* ---------- contact / title-block ---------- */
.tblock{
  border:2px solid var(--ink);background:var(--white);
  display:grid;grid-template-columns:1fr 1fr;margin-top:44px;
}
.tcell{padding:28px 30px;border-top:1px solid var(--ink)}
.tcell:nth-child(-n+2){border-top:none}
.tcell:nth-child(2n){border-left:1px solid var(--ink)}
.tcell .anno{margin-bottom:12px}
.tcell h3{
  font-family:var(--font-display);font-size:26px;font-weight:600;
  text-transform:uppercase;margin-bottom:8px;
}
.tcell p{margin:3px 0}
.tcell a{color:var(--ink);text-decoration:none;border-bottom:1px solid var(--accent)}
.tcell a:hover{color:var(--accent)}
.tcell.full{grid-column:1/-1;border-left:none}

/* ---------- footer ---------- */
.site-footer{background:var(--charcoal);color:var(--steel);margin-top:0}
.foot-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:40px;
  padding:64px 0 48px;
}
.site-footer h4{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--steel-dim);margin-bottom:16px;
}
.site-footer a{color:var(--steel);text-decoration:none}
.site-footer a:hover{color:var(--white)}
.site-footer ul{list-style:none}
.site-footer li{margin:8px 0}
.foot-brand img{height:76px;margin-bottom:16px;filter:brightness(1.15)}
.foot-brand p{font-size:15px;max-width:34ch}
.foot-bottom{
  border-top:1px solid var(--line);padding:20px 0;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .cols-2,.mep{grid-template-columns:1fr;gap:32px}
  .mep:nth-of-type(even) .media{order:0}
  .proj-grid{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:1fr 1fr}
  .stat:nth-child(odd){border-left:none}
  .stat:nth-child(n+3){border-top:1px solid var(--line)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .nav{
    display:none;position:absolute;top:104px;left:0;right:0;
    background:var(--charcoal);flex-direction:column;
    border-bottom:1px solid var(--line);padding:10px 16px 18px;
  }
  .nav.open{display:flex}
  .nav-toggle{display:block}
  .svc-grid,.proj-grid,.tblock{grid-template-columns:1fr}
  .tcell{border-left:none!important}
  .tcell:nth-child(2){border-top:1px solid var(--ink)}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .section{padding:60px 0}
}

/* ---------- annual contract ---------- */
.plan-price{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.15em;
  text-transform:uppercase;color:var(--steel-dim);
  margin-top:20px;padding-top:16px;border-top:1px solid #ecece5;
}
.svc .btn{margin-top:14px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-top:44px}
.step .num{font-family:var(--font-mono);color:var(--accent);font-size:13px;letter-spacing:.2em}
.step h3{font-family:var(--font-display);font-weight:600;font-size:24px;text-transform:uppercase;margin:8px 0 6px}
.faq{margin-top:40px;border-top:1px solid #d9d9d1}
.faq details{border-bottom:1px solid #d9d9d1}
.faq summary{
  cursor:pointer;font-family:var(--font-display);font-size:21px;
  text-transform:uppercase;letter-spacing:.03em;padding:18px 0;
  list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--font-mono);color:var(--accent);font-size:22px;flex:none}
.faq details[open] summary::after{content:"\2013"}
.faq details p{padding:0 0 18px;max-width:75ch}
@media (max-width:960px){.steps{grid-template-columns:1fr}}

/* ---------- project gallery lightbox ---------- */
.proj{cursor:default}
.proj[data-photos]{cursor:pointer}
.proj .count{
  position:absolute;top:12px;right:12px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  background:rgba(23,25,29,.82);color:var(--white);
  padding:5px 9px;border:1px solid rgba(255,255,255,.25);
}
dialog.lightbox{
  border:none;padding:0;background:transparent;max-width:min(1200px,94vw);width:auto;
}
dialog.lightbox::backdrop{background:rgba(10,11,13,.92)}
.lb-frame{position:relative;background:var(--charcoal);border:1px solid var(--line)}
.lb-frame img{display:block;max-width:min(1200px,94vw);max-height:82vh;width:auto;height:auto;margin:0 auto}
.lb-cap{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--steel);padding:12px 16px;display:flex;justify-content:space-between;gap:16px;
}
.lb-btn{
  position:absolute;top:50%;transform:translateY(-50%);
  background:rgba(23,25,29,.75);border:1px solid var(--line);color:var(--white);
  font-size:26px;line-height:1;width:46px;height:46px;cursor:pointer;
}
.lb-btn:hover{border-color:var(--accent);color:var(--accent)}
.lb-prev{left:10px}.lb-next{right:10px}
.lb-close{position:absolute;top:10px;right:10px;transform:none;width:40px;height:40px;font-size:20px}