/* ZenTech Materials LLC — clean B2B stylesheet.
   Palette taken from the supplied logo sheet:
   Navy #01356A, Sea Blue #1E6D8C, Ocean Blue #247FA3,
   Coastal Blue #2DBFAF, Leaf Green #6FBF4A, Lime Green #A6D854.
   Restrained use: navy for structure, teal/green only as accents. */
:root{
  --navy:#01356A; --navy-2:#0a2f52; --sea:#1E6D8C; --ocean:#247FA3;
  --coastal:#2DBFAF; --leaf:#6FBF4A; --ink:#1c2733; --muted:#5a6b7c;
  --line:#dbe4ec; --bg:#ffffff; --bg-soft:#eef3f7; --bg-tint:#f7fafc;
  --radius:10px; --max:1120px;
  --font: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;font-size:16.5px}
a{color:var(--sea)}
img{max-width:100%}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:16px;background:#fff;padding:8px;z-index:99}
/* Header — white bar, logo left, uppercase nav, as on the reference site */
.site-header{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;gap:24px;min-height:76px}
.logo img{display:block;height:52px;width:auto}
.logo .llc{font-size:11px;letter-spacing:.14em;color:var(--muted);display:block;margin-top:2px}
.main-nav{margin-left:auto;display:flex;gap:4px;align-items:center}
.main-nav a{color:var(--navy);text-decoration:none;font-size:13.5px;letter-spacing:.06em;font-weight:700;text-transform:uppercase;padding:10px 12px;border-radius:6px}
.main-nav a:hover,.main-nav a[aria-current="page"]{color:var(--sea);background:var(--bg-soft)}
.btn{display:inline-block;background:var(--navy);color:#fff !important;text-decoration:none;font-weight:700;padding:12px 20px;border-radius:6px;border:1px solid var(--navy)}
.btn:hover{background:var(--sea);border-color:var(--sea)}
.btn-outline{background:transparent;color:var(--navy) !important;border:1px solid var(--navy)}
.btn-outline:hover{background:var(--bg-soft);color:var(--navy) !important}
.btn-small{padding:9px 14px;font-size:14px}
.nav-toggle{display:none;margin-left:auto;background:#fff;border:1px solid var(--line);border-radius:6px;padding:9px 12px;font-weight:700;color:var(--navy)}
/* Hero */
.hero{padding:64px 0 56px;background:linear-gradient(180deg,#f7fafc 0%,#ffffff 100%);border-bottom:1px solid var(--line)}
.eyebrow{font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--sea);font-weight:800;margin:0 0 14px}
.hero h1{font-size:52px;line-height:1.12;letter-spacing:-.01em;color:var(--navy);margin:0 0 18px;max-width:760px}
.hero p.lede{font-size:19px;color:var(--muted);max-width:720px;margin:0 0 26px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-note{margin-top:22px;font-size:14.5px;color:var(--muted)}
.page-hero{padding:48px 0 36px}
.page-hero h1{font-size:42px}
.section{padding:56px 0}
.section-soft{background:var(--bg-soft)}
.section h2{font-size:30px;line-height:1.25;color:var(--navy);letter-spacing:.01em;margin:0 0 12px}
.section h2.upper{text-transform:uppercase;letter-spacing:.04em;font-size:26px}
.section .intro{color:var(--muted);max-width:760px;margin:0 0 28px}
.rule{width:48px;height:4px;background:var(--coastal);border:0;margin:0 0 18px}
/* Cards and grids */
.grid{display:grid;gap:18px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:22px;background:#fff}
.card h3{margin:0 0 8px;color:var(--navy);font-size:19px;line-height:1.35}
.card p{margin:0;color:var(--muted);font-size:15.5px}
.card .tag{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--sea);font-weight:800}
.card-link{text-decoration:none;color:inherit;display:block}
.card-link:hover{border-color:var(--sea)}
.kicker{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--sea);font-weight:800}
/* Pillars / steps */
.pillar{border-top:4px solid var(--coastal);padding-top:16px}
.pillar h3{color:var(--navy);margin:0 0 8px}
.pillar p{color:var(--muted);margin:0}
.steps{counter-reset:step}
.step{border:1px solid var(--line);border-radius:var(--radius);padding:20px 20px 20px 64px;position:relative;background:#fff}
.step::before{counter-increment:step;content:counter(step,decimal-leading-zero);position:absolute;left:20px;top:20px;color:var(--coastal);font-weight:800;font-size:20px}
/* Products accordion */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 22px}
.filter-btn{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;cursor:pointer;font-weight:700;color:var(--navy)}
.filter-btn[aria-pressed="true"]{background:var(--navy);color:#fff;border-color:var(--navy)}
details.product{border:1px solid var(--line);border-radius:var(--radius);padding:0;margin:0 0 14px;background:#fff;overflow:hidden}
details.product summary{cursor:pointer;padding:20px 22px;font-weight:800;color:var(--navy);list-style-position:inside}
details.product .body{padding:0 22px 22px;border-top:1px solid var(--line)}
details.product .body p{color:var(--muted)}
table{width:100%;border-collapse:collapse;font-size:15px}
th{text-align:left;color:var(--navy);border-bottom:2px solid var(--line);padding:10px 8px}
td{border-bottom:1px solid var(--line);padding:10px 8px;vertical-align:top}
.placeholder{background:#fff8e1;border:1px dashed #d9a441;border-radius:6px;padding:10px 12px;font-size:14.5px;color:#5d4a1a}
.placeholder strong{color:#5d4a1a}
.notice{background:var(--bg-soft);border-left:4px solid var(--sea);padding:14px 16px;border-radius:0 8px 8px 0}
/* Forms */
form label{display:block;font-weight:700;color:var(--navy);margin:14px 0 6px}
form input,form select,form textarea{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:6px;font:inherit}
form textarea{min-height:140px;resize:vertical}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
.form-note{font-size:14.5px;color:var(--muted)}
/* Footer — dark navy, reversed logo */
.site-footer{background:var(--navy);color:#dbe7f2;padding:48px 0 28px;margin-top:0}
.site-footer a{color:#dbe7f2}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
.site-footer h3{color:#fff;font-size:14px;letter-spacing:.12em;text-transform:uppercase}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:8px 0}
.footer-logo img{height:52px;width:auto;background:var(--navy);display:block}
.footer-bottom{border-top:1px solid rgba(255,255,255,.22);margin-top:36px;padding-top:18px;font-size:14px;color:#b9c9d9;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
/* CTA band */
.cta-band{background:var(--navy);color:#fff;padding:44px 0}
.cta-band h2{color:#fff;margin:0 0 8px}
.cta-band p{color:#dbe7f2;margin:0 0 20px;max-width:720px}
.cta-band .btn{background:#fff;color:var(--navy) !important;border-color:#fff}
@media (max-width:900px){
  .grid-3,.grid-4{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:40px}
}
@media (max-width:640px){
  .grid-3,.grid-4,.form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .nav-toggle{display:block}
  .main-nav{display:none;position:absolute;left:0;right:0;top:76px;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;padding:12px 24px 18px}
  .main-nav.open{display:flex}
  .main-nav .btn{margin-top:8px;text-align:center}
  .hero{padding:44px 0 40px}
  .hero h1{font-size:34px}
  .page-hero h1{font-size:32px}
  .logo img{height:44px}
}