/* ===== INVERSIS — Boilers Website ===== */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0}
body{
  font-family:'Montserrat',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  color:#191919;
  background:#fff;
  font-size:15px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

:root{
  --orange:#E85D1A;
  --orange-soft:#FBE3D2;
  --burgundy:#7a1a1a;
  --ink:#191919;
  --muted:#6B6B6B;
  --border:#E5E5E5;
  --bg-soft:#FAFAFA;
}

/* ===== HEADER ===== */
.site-header{
  border-bottom:1px solid var(--border);
  background:#fff;
}
.header-inner{
  max-width:1400px;
  margin:0 auto;
  padding:18px 32px;
  display:flex;
  align-items:center;
  gap:48px;
}
.logo{height:38px;width:auto}
.main-nav{
  display:flex;
  align-items:center;
  gap:32px;
  flex:1;
  justify-content:center;
  flex-wrap:nowrap;
}
.main-nav a{
  font-size:12px;
  font-weight:600;
  letter-spacing:1.5px;
  color:var(--ink);
  text-transform:uppercase;
  transition:color .15s ease;
  white-space:nowrap;
  line-height:1;
}
.main-nav a:hover,.main-nav a.active{color:var(--orange)}

.header-actions{display:flex;align-items:center;gap:14px}
.lang-toggle{
  display:inline-flex;
  border:1px solid var(--border);
  border-radius:4px;
  overflow:hidden;
}
.lang-toggle button{
  background:#fff;
  border:0;
  padding:6px 10px;
  font:600 11px/1 'Montserrat',sans-serif;
  letter-spacing:1px;
  cursor:pointer;
  color:var(--muted);
}
.lang-toggle button.active{background:var(--orange);color:#fff}

.btn-brochure{
  display:inline-flex;
  align-items:center;
  gap:10px;
  border:1.5px solid var(--orange);
  padding:10px 18px;
  border-radius:4px;
  color:var(--orange);
  font:600 11px/1.3 'Montserrat',sans-serif;
  letter-spacing:1px;
  text-transform:uppercase;
  cursor:pointer;
  background:#fff;
  transition:all .15s ease;
}
.btn-brochure:hover{background:var(--orange);color:#fff}
.btn-brochure svg{width:18px;height:18px;flex-shrink:0}

/* ===== HOME PAGE ===== */
.home-hero{
  max-width:1400px;
  margin:0 auto;
  padding:80px 32px 40px;
  text-align:center;
}
.home-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--orange);
  font:700 12px/1 'Montserrat',sans-serif;
  letter-spacing:2.5px;
  text-transform:uppercase;
  margin-bottom:24px;
}
.home-eyebrow .icon-bolt{
  width:28px;height:28px;
  border-radius:50%;
  background:var(--orange-soft);
  display:inline-flex;align-items:center;justify-content:center;
}
.home-eyebrow .icon-bolt svg{width:14px;height:14px;fill:var(--orange)}
.home-hero h1{
  font:300 56px/1.05 'Montserrat',sans-serif;
  letter-spacing:1px;
  text-transform:uppercase;
  margin:0 0 18px;
  max-width:900px;
  margin-inline:auto;
}
.home-hero h1 strong{font-weight:700}
.home-hero .accent-line{
  width:64px;height:3px;background:var(--orange);
  margin:24px auto;
}
.home-lead{
  max-width:680px;
  margin:0 auto;
  color:var(--muted);
  font-size:16px;
  line-height:1.7;
}

.home-products{
  max-width:1400px;
  margin:0 auto;
  padding:40px 32px 100px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:28px;
}
.product-card{
  display:block;
  position:relative;
  background:var(--bg-soft);
  border:1px solid var(--border);
  border-radius:8px;
  padding:40px 40px 36px;
  overflow:hidden;
  transition:all .2s ease;
  cursor:pointer;
}
.product-card:hover{
  border-color:var(--orange);
  box-shadow:0 12px 40px -12px rgba(232,93,26,.25);
  transform:translateY(-2px);
}
.product-card .product-eyebrow{
  font:700 11px/1 'Montserrat',sans-serif;
  letter-spacing:2px;
  color:var(--orange);
  text-transform:uppercase;
  margin-bottom:14px;
}
.product-card h2{
  font:600 28px/1.1 'Montserrat',sans-serif;
  text-transform:uppercase;
  letter-spacing:.5px;
  margin:0 0 14px;
}
.product-card .product-desc{
  color:var(--muted);
  font-size:14px;
  margin:0 0 28px;
  max-width:380px;
}
.product-card .product-image{
  margin:8px -20px 20px -20px;
  display:flex;
  align-items:center;
  justify-content:center;
}
.product-card .product-image img{
  max-height:220px;
  width:auto;
  filter:drop-shadow(0 10px 30px rgba(0,0,0,.12));
}
.product-card .product-cta{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--orange);
  font:700 12px/1 'Montserrat',sans-serif;
  letter-spacing:1.5px;
  text-transform:uppercase;
}
.product-card:hover .product-cta{gap:14px}
.product-card .product-cta svg{transition:transform .15s ease}
.product-card:hover .product-cta svg{transform:translateX(4px)}

/* ===== PRODUCT PAGE ===== */
.breadcrumb{
  max-width:1400px;
  margin:0 auto;
  padding:18px 32px 0;
  font-size:12px;
  color:var(--muted);
  display:flex;
  gap:8px;
  align-items:center;
}
.breadcrumb a:hover{color:var(--orange)}
.breadcrumb .sep{color:#C5C5C5}

.product-layout{
  max-width:1400px;
  margin:0 auto;
  padding:24px 32px 48px;
  display:grid;
  grid-template-columns:1fr 420px;
  gap:40px;
  align-items:start;
}

.product-main .product-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--orange);
  font:700 12px/1 'Montserrat',sans-serif;
  letter-spacing:2.5px;
  text-transform:uppercase;
  margin-bottom:24px;
}
.product-main .product-eyebrow .icon-bolt{
  width:28px;height:28px;border-radius:50%;
  background:var(--orange-soft);
  display:inline-flex;align-items:center;justify-content:center;
}
.product-main .product-eyebrow svg{width:14px;height:14px;fill:var(--orange)}

.product-main h1{
  font:300 52px/1.05 'Montserrat',sans-serif;
  text-transform:uppercase;
  letter-spacing:1px;
  margin:0 0 16px;
  max-width:520px;
}
.product-main .accent-line{
  width:64px;height:3px;background:var(--orange);margin:24px 0;
}
.product-main .lead{
  color:var(--muted);
  font-size:15px;
  max-width:480px;
  margin-bottom:28px;
  line-height:1.7;
}

.product-hero-image{
  margin:24px 0 36px;
  display:flex;
  justify-content:center;
}
.product-hero-image img{
  max-width:100%;
  max-height:380px;
  width:auto;
  filter:drop-shadow(0 20px 40px rgba(0,0,0,.12));
}

/* Stats row under hero */
.stats-row{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  padding:32px 0;
  border-top:1px solid var(--border);
}
.stat{text-align:center}
.stat .stat-icon{
  width:46px;height:46px;
  border-radius:50%;
  background:var(--orange-soft);
  display:inline-flex;align-items:center;justify-content:center;
  margin-bottom:14px;
}
.stat .stat-icon svg{width:22px;height:22px;fill:var(--orange);stroke:var(--orange)}
.stat .stat-value{
  font:600 22px/1.1 'Montserrat',sans-serif;
  margin-bottom:6px;
}
.stat .stat-label{
  font:600 10.5px/1 'Montserrat',sans-serif;
  letter-spacing:1.5px;
  color:var(--muted);
  text-transform:uppercase;
}

/* ===== SPEC SIDEBAR ===== */
.spec-aside{
  display:flex;
  flex-direction:column;
  gap:24px;
  position:sticky;
  top:24px;
}
.spec-card{
  border:1px solid var(--border);
  border-radius:8px;
  padding:22px 24px;
  background:#fff;
}
.spec-card-title{
  font:700 12px/1 'Montserrat',sans-serif;
  letter-spacing:2px;
  text-transform:uppercase;
  margin:0 0 18px;
}

.power-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:8px;
}
.power-btn{
  background:#fff;
  border:1.5px solid var(--border);
  border-radius:6px;
  padding:11px 6px;
  font:600 12px/1 'Montserrat',sans-serif;
  color:var(--ink);
  cursor:pointer;
  text-align:center;
  transition:all .15s ease;
}
.power-btn:hover{border-color:var(--orange);color:var(--orange)}
.power-btn.active{
  background:var(--orange);
  border-color:var(--orange);
  color:#fff;
}

/* Spec table */
.spec-section{border-top:1px solid var(--border)}
.spec-section:first-child{border-top:0}
.spec-section-head{
  width:100%;
  background:transparent;
  border:0;
  padding:14px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  cursor:pointer;
  font:700 12px/1 'Montserrat',sans-serif;
  letter-spacing:1.8px;
  text-transform:uppercase;
  color:var(--orange);
}
.spec-section-head svg{
  width:14px;height:14px;
  transition:transform .2s ease;
}
.spec-section.collapsed .spec-section-head svg{transform:rotate(180deg)}
.spec-section-body{display:block;padding-bottom:14px}
.spec-section.collapsed .spec-section-body{display:none}
.spec-row{
  display:flex;
  justify-content:space-between;
  padding:8px 0;
  font-size:13px;
}
.spec-row .spec-label{color:var(--muted)}
.spec-row .spec-value{
  font-weight:500;
  text-align:right;
  color:var(--ink);
  font-variant-numeric:tabular-nums;
}
.spec-footnote{
  margin:8px 0 0;
  padding:10px 12px;
  background:var(--bg-soft);
  border-radius:4px;
  font-size:11.5px;
  color:var(--muted);
  line-height:1.4;
}

/* ===== PARTNERS SECTION ===== */
.partners-section{
  border-top:1px solid var(--border);
  background:var(--bg-soft);
  padding:64px 32px 72px;
}
.partners-inner{
  max-width:1100px;
  margin:0 auto;
  text-align:center;
}
.partners-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--orange);
  font:700 11px/1 'Montserrat',sans-serif;
  letter-spacing:2.5px;
  text-transform:uppercase;
  margin-bottom:18px;
}
.partners-eyebrow::before,.partners-eyebrow::after{
  content:"";
  width:32px;height:1px;
  background:var(--orange);
}
.partners-section h2{
  font:600 26px/1.2 'Montserrat',sans-serif;
  letter-spacing:.5px;
  text-transform:uppercase;
  margin:0 0 12px;
}
.partners-lead{
  color:var(--muted);
  max-width:520px;
  margin:0 auto 40px;
  font-size:14.5px;
  line-height:1.6;
}
.partners-logos{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:60px;
  flex-wrap:wrap;
}
.partner{
  display:flex;
  align-items:center;
  justify-content:center;
  width:220px;
  height:110px;
  padding:12px 20px;
  filter:grayscale(100%);
  opacity:.65;
  transition:all .25s ease;
}
.partner:hover{
  filter:grayscale(0);
  opacity:1;
  transform:translateY(-2px);
}
.partner img{
  max-width:100%;
  max-height:100%;
  width:auto;
  height:auto;
  object-fit:contain;
}

/* ===== FOOTER PARTNERS ===== */
.footer-partners{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-partners img{
  height:48px;
  width:auto;
  opacity:.7;
  filter:grayscale(100%);
  transition:all .15s ease;
}
.footer-partners a:hover img{
  opacity:1;
  filter:grayscale(0);
}

/* ===== BOTTOM SECTIONS ===== */
.product-bottom{
  max-width:1400px;
  margin:0 auto;
  padding:0 32px 80px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:28px;
}
.feature-card{
  border:1px solid var(--border);
  border-radius:8px;
  padding:28px 28px 32px;
  background:#fff;
}
.feature-card h3{
  font:700 13px/1 'Montserrat',sans-serif;
  letter-spacing:1.8px;
  text-transform:uppercase;
  margin:0 0 22px;
}
.feature-list{list-style:none;margin:0;padding:0}
.feature-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:7px 0;
  font-size:13.5px;
  color:var(--ink);
}
.feature-list li .check{
  width:18px;height:18px;flex-shrink:0;
  border-radius:50%;
  background:var(--orange);
  color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  margin-top:1px;
}
.feature-list li .check svg{width:10px;height:10px;fill:#fff}

.brochure-card{
  display:flex;
  flex-direction:column;
  gap:18px;
}
.brochure-thumb{
  background:var(--bg-soft);
  border:1px solid var(--border);
  border-radius:6px;
  padding:24px 18px;
  text-align:center;
}
.brochure-thumb .thumb-logo{height:14px;margin:0 auto 10px}
.brochure-thumb .thumb-title{
  font:700 10.5px/1.3 'Montserrat',sans-serif;
  letter-spacing:1px;
  text-transform:uppercase;
  margin:0 0 8px;
  color:var(--ink);
}
.brochure-thumb .thumb-power{
  font:700 18px/1 'Montserrat',sans-serif;
  color:var(--orange);
  margin-top:6px;
}
.brochure-meta{
  font-size:12px;color:var(--muted);
  display:flex;gap:14px;
}

/* ===== SPEC ENQUIRY BUTTON ===== */
.spec-enquiry{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  width:100%;
  margin-top:16px;
  padding:15px 18px;
  background:var(--orange);
  color:#fff;
  border-radius:6px;
  font:700 12px/1 'Montserrat',sans-serif;
  letter-spacing:1px;
  text-transform:uppercase;
  cursor:pointer;
  transition:background .15s ease;
}
.spec-enquiry:hover{background:#cf4f12}
.spec-enquiry svg{width:20px;height:11px;flex-shrink:0}

/* ===== FOOTER ===== */
.site-footer{
  border-top:1px solid var(--border);
  padding:40px 32px 36px;
  background:#fff;
}
.footer-inner{
  max-width:1400px;
  margin:0 auto;
  display:grid;
  grid-template-columns:auto 1fr 1fr 1fr 1fr;
  gap:40px;
  align-items:start;
}
.footer-logo{height:32px;width:auto}
.footer-col h4{
  font:700 11px/1 'Montserrat',sans-serif;
  letter-spacing:1.5px;
  text-transform:uppercase;
  margin:0 0 12px;
  color:var(--ink);
}
.footer-col p,.footer-col a{
  font-size:13px;
  color:var(--muted);
  margin:0 0 4px;
  line-height:1.6;
}
.footer-col a:hover{color:var(--orange)}

/* ===== UTILITIES ===== */
.bilingual [data-lang-en]{display:none}
.bilingual[data-active="en"] [data-lang-en]{display:initial}
.bilingual[data-active="en"] [data-lang-pl]{display:none}

[hidden]{display:none !important}

/* ===== RESPONSIVE ===== */
@media (max-width:1180px){
  .header-inner{gap:24px;padding:18px 24px}
  .main-nav{gap:22px}
  .main-nav a{font-size:11px;letter-spacing:1px}
}
@media (max-width:900px){
  .product-layout{grid-template-columns:1fr}
  .spec-aside{position:static}
  .product-bottom{grid-template-columns:1fr}
  .home-products{grid-template-columns:1fr}
  .header-inner{flex-wrap:wrap;gap:16px}
  .main-nav{order:3;flex-basis:100%;justify-content:flex-start;flex-wrap:wrap;gap:14px 18px}
  .footer-inner{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:640px){
  .header-inner{padding:14px 18px}
  .home-hero{padding:48px 18px 24px}
  .home-hero h1{font-size:36px}
  .home-products{padding:24px 18px 60px}
  .breadcrumb{padding:16px 18px 0;flex-wrap:wrap}
  .product-layout{padding:18px 18px 32px}
  .product-main h1{font-size:34px}
  .stats-row{grid-template-columns:repeat(2,1fr);gap:18px}
  .product-bottom{padding:0 18px 48px}
  .power-grid{grid-template-columns:repeat(2,1fr)}
  .site-footer{padding:32px 18px 28px}
  .footer-inner{grid-template-columns:1fr;gap:24px}
  .partners-section{padding:48px 18px 56px}
  .partners-logos{gap:32px}
  .partner{width:170px;height:90px;padding:8px 14px}
}