:root{
    /* Inpetra brand */
    --brand:#4A2E28;        /* logo brown */
    --brand-dk:#35201C;
    --brand-lt:#EBE0D8;     /* tint */
    --cream:#F4EEE8;

    --ink:#33211D; --ink-2:#574240; --muted:#6F5A54;
    --line:#E2D6CD; --bg:#F4EEE8; --surface:#FCF9F6;
    --radius:14px;
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{margin:0;background:var(--bg);color:var(--ink);
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,"Helvetica Neue",Arial,sans-serif;
    font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
  h1,h2,h3,h4{line-height:1.15;letter-spacing:-0.022em;margin:0;font-weight:640}
  p{margin:0} a{color:inherit}
  .wrap{max-width:1140px;margin:0 auto;padding:0 28px}

  header{position:sticky;top:0;z-index:50;background:rgba(244,238,232,.88);
    backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
  .nav{display:flex;align-items:center;gap:30px;height:70px}
  .brand{display:flex;align-items:center;gap:11px;text-decoration:none;margin-right:auto}
  /* ---- LOGO ----
     Replace the .brand contents with the real logo file when you have it:
     <a class="brand" href="#top"><img src="inpetra-logo.svg" alt="Inpetra" height="26"></a>
     Until then this is a text treatment in the brand brown.                     */
  .brand img{height:26px;display:block}
  .wordmark{font-weight:600;letter-spacing:.01em;font-size:25px;color:var(--brand);
    text-transform:lowercase;line-height:1}
  .nav a.link{text-decoration:none;color:var(--ink-2);font-size:15px;font-weight:500}
  .nav a.link:hover{color:var(--brand)}
  .btn{display:inline-block;text-decoration:none;font-weight:600;font-size:15px;
    padding:11px 20px;border-radius:999px;border:1px solid transparent;transition:.15s ease}
  .btn-primary{background:var(--brand);color:var(--cream)}
  .btn-primary:hover{background:var(--brand-dk)}
  .btn-ghost{border-color:var(--line);color:var(--ink);background:var(--surface)}
  .btn-ghost:hover{border-color:var(--brand);color:var(--brand)}

  .hero{padding:96px 0 76px}
  .eyebrow{display:inline-block;font-size:12.5px;font-weight:660;letter-spacing:.13em;
    text-transform:uppercase;color:var(--brand);background:var(--brand-lt);
    padding:6px 13px;border-radius:999px;margin-bottom:26px}
  .hero h1{font-size:clamp(34px,5.1vw,56px);max-width:16ch}
  .hero .lede{font-size:19px;color:var(--muted);max-width:58ch;margin-top:22px}
  .hero .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}

  .facts{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--surface)}
  .facts .grid{display:grid;grid-template-columns:repeat(4,1fr)}
  .fact{padding:30px 26px;border-right:1px solid var(--line)}
  .fact:last-child{border-right:none}
  .fact .k{font-size:13px;font-weight:660;letter-spacing:.08em;text-transform:uppercase;color:var(--brand)}
  .fact .v{margin-top:7px;font-size:15px;color:var(--ink-2);line-height:1.5}

  section{padding:88px 0}
  .sechead{max-width:64ch;margin-bottom:44px}
  .sechead h2{font-size:clamp(26px,3.4vw,36px)}
  .sechead p{margin-top:16px;color:var(--muted);font-size:17.5px}

  .cat{margin-bottom:64px}
  .cat:last-child{margin-bottom:0}
  .cat-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;
    padding-bottom:16px;border-bottom:2px solid var(--ink);margin-bottom:26px}
  .cat-head h3{font-size:23px}
  .cat-head .tag{font-size:13px;font-weight:600;letter-spacing:.06em;
    text-transform:uppercase;color:var(--brand);margin-left:auto}
  .cat-intro{color:var(--muted);font-size:16.5px;max-width:70ch;margin-bottom:26px}

  .tbl{width:100%;border-collapse:collapse;font-size:15px;background:var(--surface);
    border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
  .tbl th{text-align:left;font-size:12.5px;letter-spacing:.07em;text-transform:uppercase;
    color:var(--muted);font-weight:640;padding:13px 18px;background:#EFE7E0;
    border-bottom:1px solid var(--line);white-space:nowrap}
  .tbl td{padding:14px 18px;border-bottom:1px solid var(--line);vertical-align:top}
  .tbl tr:last-child td{border-bottom:none}
  .tbl .model{font-weight:660;white-space:nowrap}
  .tbl .dim{white-space:nowrap;font-variant-numeric:tabular-nums}
  .tbl .in{color:var(--muted);font-size:13.5px;display:block}

  .feat{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}
  .fcard{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:20px 22px}
  .fcard h4{font-size:15.5px;margin-bottom:7px}
  .fcard p{font-size:14.5px;color:var(--muted);line-height:1.55}

  .split{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:4px}
  .card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
  .shot{min-height:250px;background:#fff;display:grid;place-items:center;overflow:hidden;
    padding:24px;border-bottom:1px solid var(--line)}
  .shot span{font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;color:#A8938A;font-weight:600}
  .card-body{padding:26px}
  .card h3{font-size:20px}
  .card .sub{color:var(--muted);font-size:15.5px;margin-top:10px}
  .specs{list-style:none;padding:0;margin:20px 0 0;border-top:1px solid var(--line)}
  .specs li{display:flex;justify-content:space-between;gap:18px;padding:10px 0;
    border-bottom:1px solid var(--line);font-size:14.5px}
  .specs li:last-child{border-bottom:none}
  .specs li span:first-child{color:var(--muted)}
  .specs li span:last-child{font-weight:560;text-align:right}

  .std{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
  .chip{font-size:13px;font-weight:600;padding:7px 14px;border-radius:999px;
    background:var(--brand-lt);color:var(--brand-dk)}

  .cap{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .cols{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
  .col .num{width:34px;height:34px;border-radius:9px;background:var(--brand-lt);color:var(--brand);
    display:grid;place-items:center;font-weight:700;font-size:14px;margin-bottom:18px}
  .col h3{font-size:18.5px}
  .col p{margin-top:11px;color:var(--muted);font-size:15.5px}

  .about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:start}
  .about-copy p+p{margin-top:16px}
  .about-copy p{color:var(--ink-2)}
  .infobox{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
  .infobox h4{margin:0 0 4px;font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--brand);font-weight:660}
  .infobox dl{margin:16px 0 0;display:grid;gap:14px}
  .infobox dt{font-size:13px;color:var(--muted);margin-bottom:2px}
  .infobox dd{margin:0;font-size:15.5px;font-weight:540}

  .contact{background:var(--brand);color:var(--cream)}
  .contact h2{font-size:clamp(26px,3.4vw,36px);max-width:20ch}
  .contact .lede{color:#D9C7BE;margin-top:16px;max-width:52ch;font-size:17.5px}
  .contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
  .ci{display:grid;gap:20px}
  .ci .lab{font-size:12.5px;letter-spacing:.11em;text-transform:uppercase;color:#C0A79C;font-weight:640}
  .ci .val{font-size:18px;font-weight:560;margin-top:4px}
  .ci a{text-decoration:none;border-bottom:1px solid rgba(244,238,232,.34)}
  .ci a:hover{border-color:var(--cream)}
  .btn-light{background:var(--cream);color:var(--brand);margin-top:8px;justify-self:start}
  .btn-light:hover{background:var(--brand-lt)}

  footer{padding:44px 0;font-size:14px;color:var(--muted)}
  .foot{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}

  @media (max-width:980px){
    .facts .grid{grid-template-columns:repeat(2,1fr)}
    .fact:nth-child(2){border-right:none}
    .fact:nth-child(1),.fact:nth-child(2){border-bottom:1px solid var(--line)}
    .feat{grid-template-columns:1fr}
    .cols{grid-template-columns:1fr;gap:34px}
    .about-grid,.contact-grid,.split{grid-template-columns:1fr;gap:34px}
  }
  @media (max-width:680px){
    .nav a.link{display:none}
    .hero{padding:64px 0 52px} section{padding:64px 0}
    .tbl{font-size:14px} .tbl th,.tbl td{padding:11px 13px}
    .tblwrap{overflow-x:auto}
  }

  /* ---- product imagery ---- */
  .strip{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-bottom:28px}
  .strip figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
  .strip img{width:100%;height:190px;object-fit:contain;display:block;background:#fff;padding:10px}
  .strip figcaption{font-size:12.5px;font-weight:660;letter-spacing:.05em;text-align:center;
    padding:9px 6px;border-top:1px solid var(--line);color:var(--brand);background:var(--surface)}
  .duo{display:grid;grid-template-columns:.9fr 1.1fr;gap:26px;align-items:center}
  .duo>*{min-width:0}
  .photo{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
  .photo img{width:100%;display:block;object-fit:contain;background:#fff;padding:16px;max-height:400px}
  .shot img{display:block;width:auto;height:auto;max-width:100%;max-height:210px;margin:0 auto}
  @media (max-width:680px){ .shot img{max-height:180px} }
  @media (max-width:980px){ .duo{grid-template-columns:1fr} }
  @media (max-width:680px){ .strip{grid-template-columns:repeat(2,1fr)} .strip img{height:150px} }

/* ---- multi-page additions ---- */
.nav a.link[aria-current="page"]{color:var(--brand);font-weight:640}
.crumbs{font-size:13.5px;color:var(--muted);padding-top:26px}
.crumbs a{text-decoration:none}.crumbs a:hover{color:var(--brand)}
.crumbs span{margin:0 7px;opacity:.6}
.page-hero{padding:40px 0 56px}
.page-hero h1{font-size:clamp(30px,4.4vw,46px);max-width:22ch}
.page-hero .lede{font-size:18.5px;color:var(--muted);max-width:66ch;margin-top:18px}
.page-hero .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.answer{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--brand);
  border-radius:12px;padding:20px 24px;margin-top:30px;max-width:78ch}
.answer .k{font-size:12.5px;font-weight:660;letter-spacing:.1em;text-transform:uppercase;color:var(--brand);margin-bottom:6px}
.answer p{font-size:16px;color:var(--ink-2)}
.prose{max-width:74ch}
.prose h2{font-size:clamp(24px,3vw,31px);margin:0 0 14px}
.prose h3{font-size:19px;margin:28px 0 8px}
.prose p{color:var(--ink-2);margin-top:12px}
.prose ul{color:var(--ink-2);padding-left:20px;margin:12px 0 0}
.prose li{margin-top:6px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:0 22px;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:620;font-size:16.5px;padding:18px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--brand);font-weight:700}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 0 18px;color:var(--ink-2);font-size:15.5px}
.faq h2.group{font-size:21px;margin:40px 0 16px}
.faq h2.group:first-child{margin-top:0}
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.tile{display:block;text-decoration:none;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;transition:.15s ease}
.tile:hover{border-color:var(--brand)}
.tile img{width:100%;height:200px;object-fit:contain;background:#fff;padding:14px;display:block;border-bottom:1px solid var(--line)}
.tile .b{padding:18px 20px}
.tile h3{font-size:17.5px}
.tile p{font-size:14.5px;color:var(--muted);margin-top:6px;line-height:1.5}
.tile .more{display:inline-block;margin-top:10px;font-size:14px;font-weight:620;color:var(--brand)}
.contacts{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.contacts .cbox{background:rgba(244,238,232,.08);border:1px solid rgba(244,238,232,.22);border-radius:12px;padding:20px 22px}
.foot-links{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;padding-bottom:28px;margin-bottom:24px;border-bottom:1px solid var(--line)}
.foot-links h4{font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--brand);margin-bottom:10px}
.foot-links a{display:block;text-decoration:none;color:var(--ink-2);font-size:14.5px;padding:3px 0}
.foot-links a:hover{color:var(--brand)}
@media (max-width:980px){.tiles{grid-template-columns:1fr 1fr}.contacts{grid-template-columns:1fr}}
@media (max-width:680px){.tiles,.foot-links{grid-template-columns:1fr}}
.split .photo{display:grid;place-items:center}
.tbl caption{padding-left:4px!important}