/* SINER — Mercedes-Benz-inspired variant: black & white, serif display type, editorial grid */
:root {
  --black: #000;
  --ink: #0a0a0a;
  --grey-1: #1a1a1a;
  --grey-2: #333;
  --grey-5: #767676;
  --grey-6: #9f9f9f;
  --grey-8: #e8e8e8;
  --grey-9: #f4f4f4;
  --white: #fff;
  --blue: #0078d6;
  --serif: "Crimson Pro", "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --wrap: 1280px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font: 400 16px/1.6 var(--sans); color: var(--ink); background: var(--white); -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1em; }
h1, h2, h3 { margin: 0; font-family: var(--serif); font-weight: 300; letter-spacing: -.01em; line-height: 1.1; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 64px; }
.label { font: 400 13px/1.4 var(--sans); color: var(--grey-5); margin-bottom: 14px; display: block; }
.dark .label, .hero .label { color: var(--grey-6); }

/* Header: centred logo, evenly spaced nav row */
.hdr { position: sticky; top: 0; z-index: 50; background: var(--black); color: var(--white); }
.hdr-top { height: 72px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; padding: 0 32px; }
.hdr-top .side { font-size: 13px; color: var(--grey-6); }
.hdr-top .side.r { text-align: right; }
.hdr-top .side a:hover { color: var(--white); }
.hdr-logo img { height: 26px; width: auto; }
.nav { display: flex; justify-content: space-between; max-width: 1280px; margin: 0 auto; padding: 0 80px 22px; }
.nav a { font: 400 14px/1 var(--sans); letter-spacing: .06em; text-transform: uppercase; color: var(--grey-6); transition: color .2s; }
.nav a:hover, .nav a[aria-current] { color: var(--white); }
.burger { display: none; background: none; border: 0; padding: 8px; cursor: pointer; justify-self: end; }
.burger span { display: block; width: 22px; height: 1.5px; background: var(--white); margin: 6px 0; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 10px; height: 44px; padding: 0 22px; border-radius: 4px; font: 500 15px/1 var(--sans); transition: background .2s, color .2s; }
.btn::after { content: ""; width: 7px; height: 7px; border-right: 1.5px solid currentColor; border-top: 1.5px solid currentColor; transform: rotate(45deg); margin-left: 2px; }
.btn-white { background: var(--white); color: var(--black); }
.btn-white:hover { background: var(--grey-8); }
.btn-black { background: var(--black); color: var(--white); }
.btn-black:hover { background: var(--grey-2); }
.btn-ghost { border: 1px solid rgba(255,255,255,.6); color: var(--white); }
.btn-ghost:hover { background: rgba(255,255,255,.1); }
.textlink { display: inline-flex; align-items: center; gap: 8px; font: 500 15px/1 var(--sans); color: var(--blue); }
.textlink::after { content: ""; width: 6px; height: 6px; border-right: 1.5px solid currentColor; border-top: 1.5px solid currentColor; transform: rotate(45deg); }
.dark .textlink { color: var(--white); }

/* Hero */
.hero { position: relative; height: calc(100vh - 120px); min-height: 560px; color: var(--white); background: var(--black); overflow: hidden; display: flex; align-items: center; }
.hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(0,0,0,.78) 0%, rgba(0,0,0,.45) 42%, rgba(0,0,0,0) 70%); }
.hero .wrap { position: relative; z-index: 2; width: 100%; }
.hero h1 { font-size: 64px; line-height: 1.08; max-width: 620px; margin-bottom: 28px; }
.hero p { font-size: 16px; color: #d9d9d9; max-width: 460px; margin-bottom: 30px; }
.hero .actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Sections */
.sec { padding: 140px 0; }
.dark { background: var(--black); color: var(--white); }
.soft { background: var(--grey-9); }
.h2 { font-size: 48px; line-height: 1.12; }
.h3 { font-size: 30px; line-height: 1.2; }
.lead { font-size: 18px; color: var(--grey-5); max-width: 560px; }
.dark .lead { color: var(--grey-6); }

/* Statement + figures */
.statement { display: grid; grid-template-columns: 1.3fr 1fr; gap: 96px; align-items: end; }
.statement .h2 { font-size: 54px; }
.figures { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--grey-8); }
.figures div { padding: 26px 0 22px; border-bottom: 1px solid var(--grey-8); }
.figures div:nth-child(even) { padding-left: 28px; border-left: 1px solid var(--grey-8); }
.figures b { display: block; font: 300 34px/1.1 var(--serif); margin-bottom: 6px; white-space: nowrap; }
.figures span { font-size: 13px; color: var(--grey-5); }

/* Editorial staggered grid (two columns, right one offset) */
.edit { display: grid; grid-template-columns: 1fr 1fr; column-gap: 96px; }
.edit-item { margin-bottom: 120px; }
.edit-item:nth-child(even) { margin-top: 220px; }
.edit-item .h3 { margin-bottom: 30px; }
.edit-img { overflow: hidden; background: var(--grey-9); }
.edit-img img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; transition: transform .8s; }
.edit-item:hover .edit-img img { transform: scale(1.03); }
.edit-item p { margin-top: 22px; color: var(--grey-5); max-width: 460px; }

/* Product showcase on light gradient */
.prod-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.prod { display: flex; flex-direction: column; }
.prod-img { aspect-ratio: 4 / 5; display: flex; align-items: center; justify-content: center; padding: 48px 36px;
  background: radial-gradient(70% 55% at 50% 48%, #ffffff 0%, #f1f1f1 55%, #e4e4e4 100%); margin-bottom: 26px; overflow: hidden; }
.prod-img img { max-width: 100%; max-height: 100%; object-fit: contain; filter: drop-shadow(0 26px 30px rgba(0,0,0,.22)); transition: transform .7s; }
.prod:hover .prod-img img { transform: scale(1.04); }
.prod h3 { font-size: 28px; margin-bottom: 10px; }
.prod p { color: var(--grey-5); font-size: 15px; margin-bottom: 18px; }

/* Split: big serif left, image right (dark) */
.split { display: grid; grid-template-columns: 1fr 1.15fr; gap: 96px; align-items: center; }
.split.rev .split-img { order: -1; }
.split-img { background-size: cover; background-position: center; aspect-ratio: 16 / 10; }
.split .h2 { margin-bottom: 26px; }

/* Full-bleed image band */
.band { position: relative; color: var(--white); background: var(--black); overflow: hidden; }
.band-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.band::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(0,0,0,.75), rgba(0,0,0,.2) 70%); }
.band .wrap { position: relative; z-index: 2; padding-top: 180px; padding-bottom: 180px; }
.band .h2 { font-size: 60px; max-width: 700px; margin-bottom: 20px; }

/* Lists */
.lines { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--grey-8); }
.lines li { padding: 16px 0; border-bottom: 1px solid var(--grey-8); }
.dark .lines, .dark .lines li { border-color: var(--grey-2); }
.cols3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 56px; }
.cols3 .h3 { margin-bottom: 14px; }
.cols3 p { color: var(--grey-5); }
.dark .cols3 p { color: var(--grey-6); }
.cols4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; }
.cert b { display: block; font: 300 26px/1.15 var(--serif); margin-bottom: 8px; }
.cert span { font-size: 14px; color: var(--grey-6); }
.loc .label { margin-bottom: 8px; }
.loc .h3 { margin-bottom: 8px; }
.loc p { font-size: 14px; color: var(--grey-5); }

/* Page header for inner pages */
.phero { position: relative; height: 70vh; min-height: 480px; color: var(--white); background: var(--black); display: flex; align-items: flex-end; overflow: hidden; }
.phero .hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.phero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(0,0,0,.8) 0%, rgba(0,0,0,.2) 55%, rgba(0,0,0,.1)); }
.phero .wrap { position: relative; z-index: 2; width: 100%; padding-bottom: 80px; }
.phero h1 { font-size: 72px; margin-bottom: 14px; }
.phero p { color: #d9d9d9; max-width: 520px; margin: 0; }

/* Products page family block */
.fam { display: grid; grid-template-columns: 1.1fr 1fr; gap: 96px; align-items: center; }
.fam.rev .prod-img { order: 2; }
.fam .prod-img { aspect-ratio: 1 / 1; margin: 0; padding: 72px; }
.fam .h2 { margin-bottom: 22px; }
.fam .lines { margin: 26px 0 34px; max-width: 480px; }
.thumbs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.thumbs.two { grid-template-columns: repeat(2, 1fr); }
.thumb .prod-img { aspect-ratio: 4 / 3; padding: 28px; margin-bottom: 14px; }
.thumb span { font-size: 14px; color: var(--grey-5); }

/* Industry full-screen blocks */
.ind { position: relative; min-height: 86vh; display: flex; align-items: flex-end; color: var(--white); overflow: hidden; scroll-margin-top: 120px; }
.ind .hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.ind::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(0,0,0,.8), rgba(0,0,0,.35) 50%, rgba(0,0,0,0) 80%), linear-gradient(0deg, rgba(0,0,0,.7), rgba(0,0,0,0) 50%); }
.ind .wrap { position: relative; z-index: 2; width: 100%; padding-bottom: 90px; }
.ind-card { max-width: 560px; }
.ind-card .h2 { font-size: 56px; margin-bottom: 14px; }
.ind-card p { color: #d9d9d9; font-size: 17px; margin-bottom: 22px; }
.ind-card .lines, .ind-card .lines li { border-color: rgba(255,255,255,.22); }
.ind-card .lines li { padding: 11px 0; font-size: 15px; }

/* Contact */
.contact-big { display: grid; grid-template-columns: 1fr 1.3fr 1fr; gap: 48px; border-top: 1px solid var(--grey-8); padding-top: 40px; }
.contact-big a, .contact-big span.v { font: 300 32px/1.2 var(--serif); overflow-wrap: anywhere; }
.contact-big a:hover { color: var(--blue); }

/* Footer */
.ftr { background: var(--black); color: var(--grey-6); padding: 80px 0 40px; font-size: 14px; }
.ftr-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 56px; border-bottom: 1px solid var(--grey-2); }
.ftr h4 { color: var(--white); font: 400 14px/1 var(--sans); margin: 0 0 18px; }
.ftr ul { list-style: none; margin: 0; padding: 0; }
.ftr li { margin: 10px 0; }
.ftr a:hover { color: var(--white); }
.ftr img { height: 24px; width: auto; margin-bottom: 20px; }
.ftr-bottom { padding-top: 24px; font-size: 13px; }

/* Reveal */
.rv { opacity: 0; transform: translateY(24px); transition: opacity .9s ease, transform .9s ease; }
.rv.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .rv { opacity: 1; transform: none; transition: none; } }

@media (max-width: 1100px) {
  .wrap { padding: 0 40px; }
  .nav { padding: 0 40px 20px; }
  .hero h1 { font-size: 52px; }
  .statement { grid-template-columns: 1fr; gap: 48px; }
  .edit { column-gap: 48px; }
  .split, .fam { gap: 56px; }
}
@media (max-width: 860px) {
  .nav { display: none; flex-direction: column; gap: 0; padding: 0 0 12px; }
  .nav.open { display: flex; }
  .nav a { padding: 14px 32px; }
  .hdr-top .side.r { display: none; }
  .burger { display: block; }
  .edit, .split, .fam, .prod-row, .cols3 { grid-template-columns: 1fr; }
  .edit-item:nth-child(even) { margin-top: 0; }
  .edit-item { margin-bottom: 72px; }
  .fam.rev .prod-img, .split.rev .split-img { order: 0; }
  .cols4 { grid-template-columns: 1fr 1fr; }
  .contact-big { grid-template-columns: 1fr; gap: 28px; }
  .ftr-grid { grid-template-columns: 1fr 1fr; }
  .sec { padding: 96px 0; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 20px; }
  .hdr-top { padding: 0 20px; }
  .hero h1, .phero h1 { font-size: 40px; }
  .h2, .statement .h2, .band .h2, .ind-card .h2 { font-size: 34px; }
  .h3, .prod h3 { font-size: 24px; }
  .figures b { font-size: 24px; white-space: normal; }
  .figures div:nth-child(even) { padding-left: 16px; }
  .thumbs { grid-template-columns: 1fr 1fr; gap: 12px; }
  .cols4 { grid-template-columns: 1fr; }
  .fam .prod-img { padding: 36px; }
  .contact-big a, .contact-big span.v { font-size: 24px; }
  .sec { padding: 72px 0; }
  .band .wrap { padding-top: 110px; padding-bottom: 110px; }
  .ftr-grid { grid-template-columns: 1fr; }
}
.cols5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 36px; }
@media (max-width: 1100px) { .cols5 { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 560px) { .cols5 { grid-template-columns: 1fr; } .hero .actions .btn { flex: 1 1 auto; justify-content: center; } }
.hdr-top .burger { grid-column: 3; grid-row: 1; }

/* 4-up thumbs and full-bleed photo thumbs */
.thumbs.four { grid-template-columns: repeat(4, 1fr); }
.thumb.photo .prod-img { padding: 0; overflow: hidden; }
.thumb.photo .prod-img img { width: 100%; height: 100%; max-width: none; max-height: none; object-fit: cover; filter: none; }
@media (max-width: 900px) { .thumbs.four { grid-template-columns: 1fr 1fr; } }
/* per-valve scale so cut-outs carry equal visual weight (see tools-valve-scale.py) */
.prod-img img { max-width: calc(var(--k, 1) * 100%); max-height: calc(var(--k, 1) * 100%); }

/* print / save as PDF: keep photos, keep header at top, don't split blocks across pages */
@media print {
  @page { size: A4; margin: 10mm; }
  * { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .hdr { position: static; }
  .burger { display: none !important; }
  .rv { opacity: 1 !important; transform: none !important; transition: none !important; }
  .phero { height: 360px; min-height: 0; }
  .hero { height: 520px; min-height: 0; }
  .sec { padding-top: 56px; padding-bottom: 56px; }
  .band .wrap { padding-top: 90px; padding-bottom: 90px; }
  .fam, .thumbs, .prod, .thumb, .split, .edit, .ind, .cert, .loc, figure, .band, .phero, .ftr { break-inside: avoid; page-break-inside: avoid; }
  h1, h2, h3, .label { break-after: avoid; page-break-after: avoid; }
}
@media print {
  .fam { grid-template-columns: 1fr 1fr; gap: 40px; }
  .fam.rev .prod-img { order: 2; }
  .fam .prod-img { padding: 36px; }
  .thumbs { grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 32px; }
  .thumbs.two { grid-template-columns: repeat(2, 1fr); }
  .h2 { font-size: 34px; }
}
@media (max-width: 560px) { .band-bg[style*="factory-building"] { background-position: 100% 15% !important; } }
@media (max-width: 560px) {
  .hqband .wrap { padding-top: 270px; padding-bottom: 36px; }
  .hqband::after { background: linear-gradient(0deg, rgba(0,0,0,.8) 0%, rgba(0,0,0,.45) 35%, rgba(0,0,0,0) 60%); }
}
.band .label { color: #cfcfcf; }

/* Cut-outs fill the box and are contained inside its padding; no reliance on max-height:% (Safari
   does not resolve it inside aspect-ratio flex boxes, which let images render at natural size). */
.prod-img { position: relative; }
.prod-img img { position: absolute; inset: 0; width: 100%; height: 100%; max-width: none; max-height: none;
  box-sizing: border-box; padding: inherit; object-fit: contain; scale: var(--k, 1); }
.thumb.photo .prod-img img { padding: 0; object-fit: cover; scale: 1; }