:root{
  --red:#d71920;
  --red-dark:#b8141a;
  --ink:#111214;
  --muted:#666b73;
  --line:#e7e8ea;
  --soft:#f7f7f8;
  --soft2:#fbfbfc;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:white;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit}
.container{width:min(var(--max),calc(100% - 48px));margin:auto}
.site-header{
  height:78px;border-bottom:1px solid var(--line);display:flex;align-items:center;background:rgba(255,255,255,.96);
  position:sticky;top:0;z-index:50;backdrop-filter:blur(16px)
}
.nav{display:flex;align-items:center;justify-content:space-between;width:100%}
.brand img{width:132px;height:auto}
.menu{display:flex;gap:42px;align-items:center;font-size:13px;font-weight:650;letter-spacing:.02em}
.menu a{padding:29px 0;position:relative}
.menu a.active:after,.menu a:hover:after{content:"";position:absolute;left:0;right:0;bottom:19px;height:2px;background:var(--red)}
.actions{display:flex;align-items:center;gap:18px;font-size:13px}
.icon-btn{border:0;background:none;padding:6px;cursor:pointer}
.breadcrumbs{font-size:12px;color:#7a7f86;padding:26px 0 10px}
.breadcrumbs span{margin:0 8px;color:#bbb}
.hero{
  min-height:600px;display:grid;grid-template-columns:.9fr 1.1fr;align-items:center;gap:50px;padding:58px 0 74px
}
.hero h1{font-size:62px;line-height:.94;letter-spacing:-.045em;margin:0 0 26px;max-width:580px}
.hero p{font-size:18px;line-height:1.55;color:var(--muted);max-width:460px;margin:0 0 28px}
.btn{display:inline-flex;align-items:center;gap:12px;background:var(--red);color:white;padding:15px 22px;border-radius:4px;font-size:14px;font-weight:700;border:1px solid var(--red)}
.btn:hover{background:var(--red-dark)}
.btn.secondary{background:white;color:var(--ink);border-color:#d6d8db}
.hero-art{background:linear-gradient(145deg,#fff 30%,#f6f7f8);min-height:420px;display:flex;align-items:center;justify-content:center}
.hero-stack{position:relative;width:100%;height:430px}
.hero-stack img{position:absolute;object-fit:contain}
.hero-stack .g{width:48%;left:3%;bottom:14%}
.hero-stack .gl{width:34%;left:41%;bottom:5%}
.hero-stack .h{width:43%;right:-1%;bottom:5%}
.section{padding:56px 0}
.section.soft{background:var(--soft2)}
.section-title{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:28px}
.section-title h2{font-size:38px;letter-spacing:-.03em;margin:0}
.section-title p{margin:0;color:var(--muted);max-width:580px;line-height:1.6}
.home-cards{display:grid;grid-template-columns:1fr;gap:10px}
.home-band{min-height:300px;background:linear-gradient(90deg,#fafafa,#f3f4f5);display:grid;grid-template-columns:.45fr .55fr;align-items:center;padding:44px 64px}
.home-band.reverse{grid-template-columns:.55fr .45fr}
.home-band h3{font-size:42px;line-height:1;letter-spacing:-.04em;margin:0 0 18px}
.home-band p{color:var(--muted);max-width:300px;line-height:1.6}
.home-band img{height:245px;width:100%;object-fit:contain}
.red-rule{width:36px;height:2px;background:var(--red);margin:18px 0}
.resource-strip{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.resource-strip a{padding:28px 24px;display:flex;align-items:center;justify-content:space-between;border-right:1px solid var(--line);font-size:14px}
.resource-strip a:last-child{border-right:0}
.footer{border-top:1px solid var(--line);padding:42px 0 34px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1fr 2fr 1fr;align-items:center;gap:30px}
.footer small{color:#90949a}
.footer-links{display:flex;justify-content:flex-end;gap:28px;font-size:13px;color:#5e6268}

/* product overview */
.page-title{padding:58px 0 30px}
.page-title h1{font-size:64px;letter-spacing:-.045em;margin:0 0 16px}
.page-title p{font-size:19px;color:var(--muted);max-width:560px;line-height:1.55}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.category-card{background:linear-gradient(160deg,#fafafa,#f4f5f6);min-height:460px;padding:30px;position:relative;overflow:hidden}
.category-card h3{font-size:30px;line-height:1;letter-spacing:-.035em;margin:0}
.category-card ul{list-style:none;margin:22px 0 0;padding:0;font-size:14px;line-height:2.2}
.category-card li a{color:#333}.category-card li a:hover{color:var(--red)}
.category-card img{position:absolute;right:-8%;bottom:0;width:72%;height:68%;object-fit:contain}
.application-row{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.app-pill{border:1px solid var(--line);padding:18px 10px;text-align:center;font-size:13px;background:white}
.series-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.series-card{border:1px solid var(--line);padding:24px;min-height:390px;display:flex;flex-direction:column}
.eyebrow{font-size:12px;font-weight:800;color:var(--red);letter-spacing:.03em;text-transform:uppercase}
.series-card h3{font-size:24px;letter-spacing:-.02em;margin:7px 0 8px}
.series-card p{font-size:14px;color:var(--muted);line-height:1.55}
.series-card img{margin-top:auto;height:210px;object-fit:contain}

/* category listing */
.tabs{display:flex;gap:42px;border-bottom:1px solid var(--line);margin:12px 0 42px}
.tabs a{padding:0 0 16px;font-weight:650;font-size:15px}
.tabs a.active{color:var(--red);border-bottom:3px solid var(--red)}
.listing-layout{display:grid;grid-template-columns:155px 1fr;gap:34px}
.filters h4{font-size:12px;letter-spacing:.08em;margin:0 0 18px}
.filter-chip{border:1px solid #d9dce0;border-radius:22px;padding:10px 14px;margin:0 0 10px;font-size:13px;background:white;width:100%;text-align:left;cursor:pointer}
.filter-chip.active{border-color:var(--red);color:var(--red)}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.product-card{border:1px solid var(--line);padding:18px;min-height:410px;display:flex;flex-direction:column;transition:.2s}
.product-card:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(0,0,0,.05)}
.product-card img{height:210px;object-fit:contain;margin-bottom:10px}
.product-card h3{font-size:20px;margin:4px 0 8px;letter-spacing:-.02em}
.product-card p{color:var(--muted);font-size:14px;line-height:1.5;margin:0 0 16px}
.tags{margin-top:auto;display:flex;gap:8px;flex-wrap:wrap}
.tag{border:1px solid #cfd2d6;border-radius:3px;padding:5px 8px;font-size:11px;color:#4d5157}

/* detail */
.detail-top{display:grid;grid-template-columns:1.02fr .98fr;gap:70px;padding:42px 0 34px;align-items:start}
.gallery-main{min-height:470px;display:flex;align-items:center;justify-content:center}
.gallery-main img{width:100%;height:420px;object-fit:contain}
.thumb-row{display:flex;gap:30px;align-items:end;margin-top:10px}
.thumb{width:78px;border:0;background:none;padding:0 0 14px;cursor:pointer;border-bottom:3px solid transparent}
.thumb img{height:52px;object-fit:contain}
.thumb.active{border-bottom-color:var(--red)}
.detail-info{padding-top:10px}
.detail-info h1{font-size:52px;line-height:.98;letter-spacing:-.04em;margin:8px 0 18px}
.standards-inline{display:flex;gap:22px;font-weight:750;font-size:18px;margin-bottom:24px}
.detail-info .lead{color:var(--muted);font-size:16px;line-height:1.55;max-width:500px}
.feature-list{margin:36px 0 26px}
.feature-list h3{color:var(--red);font-size:14px;margin-bottom:12px}
.feature-list ul{padding-left:18px;margin:0;line-height:1.85;font-size:14px}
.ctas{display:flex;gap:14px;flex-wrap:wrap}
.cert-row{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:28px 0 30px}
.cert-row h2{text-align:center;font-size:16px;margin:0 0 24px}
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.cert{display:flex;gap:16px;align-items:center;padding:0 24px;border-right:1px solid var(--line)}
.cert:last-child{border-right:0}
.cert-icon{width:42px;height:42px;border:2px solid #111;border-radius:50%;display:grid;place-items:center;font-size:18px}
.cert b{font-size:14px;display:block}.cert span{font-size:12px;color:var(--muted)}
.info-grid{display:grid;grid-template-columns:1fr 1.08fr .86fr;gap:46px;padding:38px 0}
.info-block h3{font-size:14px;color:var(--red);text-transform:uppercase;letter-spacing:.02em;margin:0 0 18px}
.info-block p,.info-block li{font-size:13px;line-height:1.65;color:#3f4348}
.info-block ul{margin:0;padding-left:18px}
.spec-table{width:100%;border-collapse:collapse;font-size:12px}
.spec-table td{padding:8px 6px;border-bottom:1px solid #dfe1e4;vertical-align:top}
.spec-table td:first-child{width:43%;font-weight:650}
.bottom-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;border-top:1px solid var(--line);padding:36px 0}
.download-list{list-style:none!important;padding:0!important}
.download-list li{display:grid;grid-template-columns:1fr auto;gap:20px;border-bottom:1px solid var(--line);padding:10px 0!important}
.download-list a{color:var(--red);font-weight:700;font-size:12px}

/* simple pages */
.simple-hero{padding:84px 0 56px;border-bottom:1px solid var(--line)}
.simple-hero h1{font-size:58px;letter-spacing:-.04em;margin:0 0 16px}
.simple-hero p{font-size:19px;color:var(--muted);max-width:650px;line-height:1.6}
.text-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;padding:56px 0}
.text-card{border-top:2px solid var(--red);padding-top:20px}
.text-card h3{font-size:22px;margin:0 0 10px}.text-card p{color:var(--muted);line-height:1.65;font-size:14px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.form-grid .full{grid-column:1/-1}
.field{width:100%;padding:14px;border:1px solid #dfe1e4;background:white}
textarea.field{min-height:150px}
.search-overlay{position:fixed;inset:78px 0 auto;background:white;border-bottom:1px solid var(--line);padding:26px;display:none;z-index:100}
.search-overlay.open{display:block}
.search-box{max-width:800px;margin:auto;display:flex;gap:10px}.search-box input{flex:1;border:1px solid #ddd;padding:14px}
.search-results{max-width:800px;margin:12px auto 0;font-size:14px;color:var(--muted)}

@media(max-width:900px){
  .menu{display:none}
  .container{width:min(100% - 28px,var(--max))}
  .hero{grid-template-columns:1fr;min-height:auto;padding-top:40px}
  .hero h1{font-size:48px}.hero-art{min-height:330px}
  .home-band,.home-band.reverse{grid-template-columns:1fr;padding:34px}
  .category-grid,.product-grid,.series-grid{grid-template-columns:1fr 1fr}
  .application-row,.resource-strip{grid-template-columns:1fr 1fr}
  .detail-top,.info-grid,.bottom-grid,.text-columns{grid-template-columns:1fr}
  .cert-grid{grid-template-columns:1fr 1fr;gap:22px}
  .cert{border-right:0}
  .listing-layout{grid-template-columns:1fr}.filters{display:flex;gap:8px;overflow:auto}.filter-chip{white-space:nowrap;width:auto}
}
@media(max-width:620px){
  .brand img{width:108px}.site-header{height:66px}.actions{gap:8px}
  .hero h1,.page-title h1,.simple-hero h1{font-size:42px}
  .hero-stack{height:300px}
  .home-band h3{font-size:34px}
  .category-grid,.product-grid,.series-grid,.resource-strip,.cert-grid,.application-row{grid-template-columns:1fr}
  .category-card{min-height:380px}.tabs{gap:22px;overflow:auto}
  .detail-info h1{font-size:40px}.gallery-main{min-height:330px}.gallery-main img{height:320px}
  .thumb-row{gap:14px;overflow:auto}.thumb{min-width:68px}
  .footer-grid{grid-template-columns:1fr}.footer-links{justify-content:flex-start;flex-wrap:wrap}
}