/* ===========================================================
   Prime Metal Engineering — Sandwich Panels & PEB
   Design tokens: Navy steel palette, ribbed-panel signature motif
   =========================================================== */

:root{
  --navy-950:#071a33;
  --navy-900:#0b2545;
  --navy-800:#123566;
  --navy-700:#1c4a86;
  --steel-400:#7a93b3;
  --steel-200:#c8d3e0;
  --steel-100:#e7ecf2;
  --white:#ffffff;
  --ink:#0e1b2c;
  --wa-green:#25d366;
  --wa-green-dark:#1ebe57;
  --alert-amber:#e8a53c;
  --radius:4px;
  --font-display:'Oswald',Impact,'Arial Narrow',sans-serif;
  --font-body:'Inter',-apple-system,Segoe UI,Roboto,sans-serif;
  --maxw:1180px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--white);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{
  font-family:var(--font-display);
  text-transform:uppercase;
  letter-spacing:.02em;
  color:var(--navy-900);
  line-height:1.15;
  margin:0 0 .5em;
}
p{margin:0 0 1em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.eyebrow{
  font-family:var(--font-display);
  text-transform:uppercase;
  letter-spacing:.18em;
  font-size:.78rem;
  color:var(--navy-700);
  display:flex;align-items:center;gap:10px;
  margin-bottom:10px;
}
.eyebrow::before{content:"";width:28px;height:3px;background:var(--alert-amber)}

/* ---------- Ribbed panel signature motif ---------- */
.ribbed{
  background-image:repeating-linear-gradient(
    90deg,
    var(--navy-800) 0px, var(--navy-800) 2px,
    var(--navy-900) 2px, var(--navy-900) 34px
  );
}
.ribbed-divider{
  height:14px;
  background-image:repeating-linear-gradient(
    90deg, var(--steel-200) 0 2px, var(--white) 2px 34px
  );
  border-top:1px solid var(--steel-200);
  border-bottom:1px solid var(--steel-200);
}
.ribbed-divider.dark{
  background-image:repeating-linear-gradient(
    90deg, var(--navy-700) 0 2px, var(--navy-900) 2px 34px
  );
  border:none;
}

/* ---------- Top bar ---------- */
.topbar{background:var(--navy-950);color:var(--steel-200);font-size:.82rem}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;padding:7px 20px;flex-wrap:wrap;gap:6px}
.topbar a{color:var(--white)}
.topbar .tb-right{display:flex;gap:16px}

/* ---------- Header / nav ---------- */
header.site-header{background:var(--white);border-bottom:1px solid var(--steel-200);position:sticky;top:0;z-index:50}
.nav-row{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;max-width:var(--maxw);margin:0 auto}
.logo{font-family:var(--font-display);font-size:1.35rem;color:var(--navy-900);text-transform:uppercase;letter-spacing:.04em}
.logo span{color:var(--alert-amber)}
nav.main-nav{display:flex;gap:26px;align-items:center}
nav.main-nav a{font-family:var(--font-display);font-size:.85rem;text-transform:uppercase;letter-spacing:.06em;color:var(--navy-900);padding:6px 0;border-bottom:2px solid transparent}
nav.main-nav a:hover{border-bottom:2px solid var(--alert-amber)}
.dropdown{position:relative}
.dropdown-menu{display:none;position:absolute;top:100%;left:0;background:var(--white);border:1px solid var(--steel-200);min-width:230px;box-shadow:0 12px 24px rgba(11,37,69,.12);padding:8px 0;z-index:60}
.dropdown:hover .dropdown-menu{display:block}
.dropdown-menu a{display:block;padding:9px 16px;font-family:var(--font-body);text-transform:none;letter-spacing:0;font-size:.92rem;border-bottom:none;color:var(--ink)}
.dropdown-menu a:hover{background:var(--steel-100);color:var(--navy-900)}
.nav-cta{background:var(--wa-green);color:var(--white)!important;padding:9px 18px!important;border-radius:var(--radius)}
.nav-cta:hover{background:var(--wa-green-dark);border-bottom-color:transparent!important}

/* ---------- Hero ---------- */
.hero{background:var(--navy-950);color:var(--white);position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(90deg, rgba(255,255,255,.035) 0 2px, transparent 2px 34px);pointer-events:none}
.hero-inner{max-width:var(--maxw);margin:0 auto;padding:64px 20px 56px;position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.hero h1{color:var(--white);font-size:2.6rem;margin-bottom:.4em}
.hero h1 em{font-style:normal;color:var(--alert-amber)}
.hero-sub{color:var(--steel-200);font-size:1.05rem;max-width:52ch}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}
.badge{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);padding:6px 12px;border-radius:20px;font-size:.8rem;color:var(--steel-200)}
.hero-ctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.btn{display:inline-block;padding:13px 24px;font-family:var(--font-display);text-transform:uppercase;letter-spacing:.05em;font-size:.88rem;border-radius:var(--radius);border:2px solid transparent;transition:.15s}
.btn-amber{background:var(--alert-amber);color:var(--navy-950)}
.btn-amber:hover{background:#f4b959}
.btn-outline{border-color:rgba(255,255,255,.5);color:var(--white)}
.btn-outline:hover{border-color:var(--white);background:rgba(255,255,255,.08)}
.btn-wa{background:var(--wa-green);color:var(--white)}
.btn-wa:hover{background:var(--wa-green-dark)}
.hero-stats{display:flex;gap:26px;margin-top:26px}
.hero-stats div{border-left:2px solid var(--alert-amber);padding-left:12px}
.hero-stats b{display:block;font-family:var(--font-display);font-size:1.6rem;color:var(--white)}
.hero-stats span{font-size:.78rem;color:var(--steel-200);text-transform:uppercase;letter-spacing:.05em}

.hero-visual{background:var(--navy-800);border:1px solid rgba(255,255,255,.15);border-radius:var(--radius);padding:26px;position:relative}
.panel-stack{display:flex;flex-direction:column;gap:6px}
.panel-slab{height:34px;border-radius:2px;display:flex;align-items:center;padding:0 12px;font-family:var(--font-display);font-size:.75rem;letter-spacing:.05em;color:var(--navy-950)}
.panel-slab.ppgi{background:var(--steel-200)}
.panel-slab.core{background:var(--alert-amber);height:60px}
.panel-slab.ppgi2{background:var(--steel-200)}
.panel-label{color:var(--steel-200);font-size:.78rem;margin-top:14px;text-align:center;letter-spacing:.04em;text-transform:uppercase}

/* ---------- Sections ---------- */
section{padding:60px 0}
.section-head{max-width:640px;margin:0 auto 40px;text-align:center}
.section-head.left{margin:0 0 34px;text-align:left}
.bg-steel{background:var(--steel-100)}
.bg-navy{background:var(--navy-950);color:var(--white)}
.bg-navy h2,.bg-navy h3{color:var(--white)}

/* ---------- Card grids ---------- */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--white);border:1px solid var(--steel-200);border-radius:var(--radius);padding:26px;transition:.15s}
.card:hover{border-color:var(--navy-700);box-shadow:0 14px 28px rgba(11,37,69,.09);transform:translateY(-3px)}
.card .num{font-family:var(--font-display);color:var(--steel-400);font-size:.85rem;letter-spacing:.1em}
.card h3{font-size:1.1rem;margin:8px 0 10px}
.card p{font-size:.93rem;color:#3c4a5c;margin-bottom:0}
.icon-chip{width:46px;height:46px;background:var(--navy-950);color:var(--alert-amber);display:flex;align-items:center;justify-content:center;border-radius:6px;font-size:1.3rem;margin-bottom:14px}

/* Product image placeholder block (no external assets) */
.img-block{
  aspect-ratio:4/3;border-radius:var(--radius);
  background:linear-gradient(135deg,var(--navy-900),var(--navy-700));
  display:flex;align-items:center;justify-content:center;color:var(--steel-200);
  font-family:var(--font-display);text-transform:uppercase;letter-spacing:.06em;font-size:.85rem;text-align:center;padding:14px;
  position:relative;overflow:hidden;
}
.img-block::before{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(90deg, rgba(255,255,255,.06) 0 2px, transparent 2px 34px)}
.img-block span{position:relative;z-index:2}
.img-block.light{background:linear-gradient(135deg,var(--steel-100),var(--steel-200));color:var(--navy-800)}

/* ---------- Table ---------- */
table.spec{width:100%;border-collapse:collapse;font-size:.92rem}
table.spec th,table.spec td{border:1px solid var(--steel-200);padding:11px 14px;text-align:left}
table.spec th{background:var(--navy-950);color:var(--white);font-family:var(--font-display);text-transform:uppercase;letter-spacing:.04em;font-size:.8rem}
table.spec tr:nth-child(even) td{background:var(--steel-100)}

/* ---------- Steps / process ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{position:relative;padding-top:10px}
.step .n{font-family:var(--font-display);font-size:2.2rem;color:var(--steel-200);position:absolute;top:-14px;right:0}
.step h4{font-size:1rem;margin-bottom:6px}
.step p{font-size:.88rem;color:#3c4a5c}

/* ---------- FAQ ---------- */
details.faq-item{border-bottom:1px solid var(--steel-200);padding:16px 0}
details.faq-item summary{cursor:pointer;font-family:var(--font-display);text-transform:uppercase;letter-spacing:.02em;font-size:1rem;color:var(--navy-900);list-style:none;display:flex;justify-content:space-between;align-items:center}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary::after{content:"+";font-size:1.4rem;color:var(--alert-amber)}
details.faq-item[open] summary::after{content:"–"}
details.faq-item p{margin-top:10px;color:#3c4a5c;font-size:.95rem}

/* ---------- City chips ---------- */
.city-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.city-chip{border:1px solid var(--steel-200);border-radius:var(--radius);padding:11px 14px;font-size:.88rem;display:flex;justify-content:space-between;align-items:center}
.city-chip:hover{border-color:var(--navy-700);background:var(--steel-100)}
.city-chip .pin{color:var(--alert-amber)}

/* ---------- Clients / logos ---------- */
.logo-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.logo-card{background:var(--white);border:1px solid var(--steel-200);border-radius:var(--radius);height:96px;display:flex;align-items:center;justify-content:center;font-family:var(--font-display);color:var(--navy-800);text-transform:uppercase;letter-spacing:.03em;font-size:.85rem;text-align:center;padding:10px}

/* ---------- CTA band ---------- */
.cta-band{background:var(--navy-950);color:var(--white);padding:50px 0;text-align:center;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(90deg, rgba(255,255,255,.04) 0 2px, transparent 2px 34px)}
.cta-band .wrap{position:relative;z-index:2}
.cta-band h2{color:var(--white)}
.cta-band p{color:var(--steel-200);max-width:520px;margin:0 auto 22px}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:.82rem;color:var(--steel-400);padding:14px 0}
.breadcrumb a{color:var(--navy-700)}

/* ---------- Footer ---------- */
footer{background:var(--navy-950);color:var(--steel-200);padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.12)}
footer h5{font-family:var(--font-display);color:var(--white);text-transform:uppercase;letter-spacing:.05em;font-size:.9rem;margin-bottom:14px}
footer a{display:block;color:var(--steel-200);font-size:.9rem;padding:4px 0}
footer a:hover{color:var(--alert-amber)}
.footer-bottom{max-width:var(--maxw);margin:0 auto;padding:18px 20px;font-size:.8rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;color:var(--steel-400)}

/* ---------- WhatsApp float ---------- */
.wa-float{position:fixed;bottom:22px;right:22px;background:var(--wa-green);color:var(--white);width:58px;height:58px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.6rem;box-shadow:0 10px 24px rgba(0,0,0,.25);z-index:80}
.wa-float:hover{background:var(--wa-green-dark)}

/* ---------- Responsive ---------- */
@media(max-width:960px){
  nav.main-nav{display:none}
  .hero-inner{grid-template-columns:1fr}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .city-grid{grid-template-columns:repeat(2,1fr)}
  .logo-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  .hero h1{font-size:1.9rem}
  .grid-3,.grid-4,.grid-2{grid-template-columns:1fr}
  .city-grid{grid-template-columns:1fr}
  .logo-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .topbar .wrap{flex-direction:column;align-items:flex-start}
}