:root{
  --bg:#080808;
  --bg-soft:#0d0d0d;
  --text:#f4f2ee;
  --muted:#a9a39a;
  --gold:#d88922;
  --line:rgba(216,137,34,.52);
  --shell:1440px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:Inter, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.shell{width:min(var(--shell), calc(100% - 64px));margin-inline:auto}

.site-header{
  position:fixed;
  inset:0 0 auto;
  z-index:20;
  background:linear-gradient(to bottom,rgba(0,0,0,.65),transparent);
}
.header-inner{
  height:86px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.footer-brand{
  font-size:22px;
  letter-spacing:.28em;
  font-weight:500;
 }
  
 .brand { display: flex; align-items: center; text-decoration: none; } 
 .brand-logo { 
   display: block; 
   width: 10%; 
   height: auto;
}
.nav{display:flex;gap:32px;color:#d6d2ca;font-size:13px;letter-spacing:.12em}
.nav a{transition:color .2s ease}
.nav a:hover{color:var(--gold)}

.hero{
  position:relative;
  min-height:100svh;
  overflow:hidden;
  display:grid;
  align-items:end;
}
.hero-image{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.hero-shade{
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg,rgba(0,0,0,.72) 0%,rgba(0,0,0,.22) 40%,rgba(0,0,0,.05) 62%,rgba(0,0,0,.32) 100%),
    linear-gradient(0deg,rgba(0,0,0,.48),transparent 38%);
}
.hero-copy{
  position:relative;
  z-index:2;
  padding-bottom:8vh;
}
.eyebrow,.section-kicker{
  margin:0 0 18px;
  color:var(--gold);
  text-transform:uppercase;
  letter-spacing:.28em;
  font-size:12px;
}
.hero h1{
  margin:0;
  max-width:760px;
  font-size:clamp(42px,6.2vw,104px);
  line-height:.92;
  letter-spacing:.02em;
  font-weight:300;
}
.text-link{
  display:inline-block;
  margin-top:30px;
  font-size:14px;
  letter-spacing:.12em;
  color:#e8e2d8;
}
.text-link span{color:var(--gold);margin-left:8px}

.section{padding:120px 0}
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:8vw;
  align-items:start;
}
h2{
  margin:0;
  font-size:clamp(32px,4vw,66px);
  line-height:1.05;
  font-weight:300;
  letter-spacing:-.02em;
}
.prose{
  color:#c7c1b8;
  font-size:18px;
  line-height:1.75;
  max-width:100%; /*. szerokość bloku tekstu 680px  */
}
.prose p{margin:0 0 18px}

.visual-section{padding:0 0 120px}
.wide-image{
  width:100%;
  /*border:1px solid rgba(255,255,255,.06);*/
   /*bbackground:#000000;*/
}

.tubes{background:var(--bg-soft)}
.tubes> .shell > h2{margin-bottom:58px}
.tube-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.tube-card{
  min-height:300px;
  padding:34px;
  border:1px solid rgba(216,137,34,.25);
  background:linear-gradient(135deg,rgba(216,137,34,.06),rgba(255,255,255,.01));
  display:grid;
  grid-template-columns:140px 1fr;
  gap:34px;
  align-items:center;
}
.tube-card img{
  width:100%;
  height:220px;
  object-fit:contain;
}
.tube-card h3{
  margin:0 0 14px;
  color:var(--gold);
  font-size:28px;
  font-weight:400;
  letter-spacing:.06em;
}
.tube-card p{
  margin:0;
  color:#bbb5ac;
  line-height:1.7;
  font-size:16px;
}

.engineering{
  position:relative;
  /*min-height:72vh;*/
  display:flex;
  align-items:center;
  overflow:hidden;
  padding:120;
}
.engineering-image{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.66;
}
.engineering-overlay{
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg,#070707 0%,rgba(7,7,7,.88) 36%,rgba(7,7,7,.38) 70%,rgba(7,7,7,.58) 100%),
    linear-gradient(0deg,#080808 0%,transparent 20%,transparent 80%,#080808 100%);
}
.engineering-copy{
  position:relative;
  z-index:2;
  padding-block:120px;
}
.engineering-copy h2{max-width:720px}
.engineering-copy p:last-child{
  max-width:650px;
  margin-top:28px;
  color:#c5beb4;
  line-height:1.75;
  font-size:18px;
}

.display-heading{margin-bottom:44px}
.display-image{margin-top:24px}

.specs{background:#050505}
.spec-grid{
  margin-top:48px;
  border-top:1px solid var(--line);
}
.spec-grid>div{
  display:grid;
  grid-template-columns:220px 1fr;
  gap:30px;
  padding:22px 0;
  border-bottom:1px solid rgba(255,255,255,.09);
}
.spec-grid span{
  color:var(--muted);
  font-size:13px;
  letter-spacing:.14em;
  text-transform:uppercase;
}
.spec-grid strong{
  font-size:18px;
  font-weight:400;
  letter-spacing:.04em;
}

.footer{
  padding:54px 0;
  border-top:1px solid rgba(255,255,255,.08);
}
.footer-inner{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
}
.footer p{margin:12px 0 0;color:var(--muted)}
.footer a{color:var(--gold);font-size:16px;letter-spacing:.12em}


.email-contact { display: flex; flex-direction: column; align-items: center; gap: 12px; margin: 80px 0; text-align: center; } .email-label { font-size: 12px; font-weight: 500; letter-spacing: 0.35em; color: #b77a32; } .email-address { position: relative; font-size: 18px; font-weight: 300; letter-spacing: 0.12em; color: #ffffff; text-decoration: none; transition: color 0.3s ease, opacity 0.3s ease; } .email-address::after { content: ""; position: absolute; left: 0; bottom: -8px; width: 0; height: 1px; background: #b77a32; transition: width 0.35s ease; } .email-address:hover { color: #d99a4a; } .email-address:hover::after { width: 100%; }


@media (max-width:900px){
  .shell{width:min(100% - 34px,var(--shell))}
  .nav{display:none}
  .header-inner{height:68px}
  .hero{min-height:760px}
  /*.hero-image{object-position:center}*/
  .hero-image{object-position:calc(50% - 10px) top}
  .hero-shade{
    background:linear-gradient(0deg,rgba(0,0,0,.72),rgba(0,0,0,.05) 65%);}
  .hero-copy{padding-bottom:60px}
  .section{padding:82px 0}
  .split,.tube-grid{grid-template-columns:1fr}
  .tube-card{grid-template-columns:100px 1fr;min-height:auto}
  .tube-card img{height:160px}
  .spec-grid>div{grid-template-columns:1fr;gap:8px}
  .engineering{min-height:620px}
  .engineering-overlay{
    background:linear-gradient(0deg,#070707 0%,rgba(7,7,7,.82) 55%,rgba(7,7,7,.5) 100%);}
}

@media (max-width:600px){
  .hero{min-height:500px; 
        background-size: auto 75%; 
        background-position: calc(50% - 10px) top;
        background-repeat: no-repeat;}
  
  .hero-copy h1{font-size:42px}
  .tube-card{grid-template-columns:1fr}
  .tube-card img{width:100px;height:150px}
  .footer-inner{align-items:flex-start;gap:28px;flex-direction:column}
}