/* ===========================================================
   Gasquip - Design System
   Material language: copper fittings, steel, blue gas flame.
=========================================================== */
:root{
  --charcoal:#1D2127;
  --charcoal-soft:#262B33;
  --warm-white:#F6F3EC;
  --panel:#FFFFFF;
  --copper:#C06B2C;
  --copper-dark:#9C551F;
  --copper-light:#F1DAC4;
  --flame-blue:#2E7AAE;
  --flame-blue-dark:#235F87;
  --ember:#D94F30;
  --success:#3F8F5F;
  --graphite:#5B6066;
  --line:#E2DCCB;
  --shadow: 0 12px 28px rgba(29,33,39,.10);
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:'IBM Plex Sans',sans-serif;
  background:var(--warm-white);
  color:var(--charcoal);
  line-height:1.55;
  font-size:16px;
}
h1,h2,h3,h4,.display{
  font-family:'Archivo',sans-serif;
  font-weight:800;
  letter-spacing:-0.01em;
  color:var(--charcoal);
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
ul{list-style:none;}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:76px 0;}
.section-head{max-width:640px;margin-bottom:44px;}
.eyebrow{
  color:var(--copper-dark);font-weight:700;font-size:.82rem;
  text-transform:uppercase;letter-spacing:.08em;margin-bottom:10px;display:block;
}
.section-head h2{font-size:2rem;margin-bottom:12px;}
.section-head p{color:var(--graphite);font-size:1.05rem;}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;font-weight:700;font-size:.98rem;
  border-radius:3px;border:2px solid transparent;cursor:pointer;
  transition:transform .12s ease, box-shadow .12s ease;
}
.btn:hover{transform:translateY(-1px);}
.btn-primary{background:var(--copper);color:#fff;}
.btn-primary:hover{background:var(--copper-dark);}
.btn-whatsapp{background:#25D366;color:#fff;}
.btn-whatsapp:hover{background:#1DA851;}
.btn-outline{border-color:var(--charcoal);color:var(--charcoal);}
.btn-outline-light{border-color:rgba(255,255,255,.6);color:#fff;}
.btn-white{background:#fff;color:var(--copper-dark);}
.btn-block{width:100%;justify-content:center;}
.btn-sm{padding:9px 16px;font-size:.85rem;}

/* Header */
header.site{
  background:var(--charcoal);color:var(--warm-white);
  position:sticky;top:0;z-index:100;border-bottom:3px solid var(--copper);
}
header.site .bar{display:flex;align-items:center;justify-content:space-between;height:74px;gap:24px;}
.logo{font-family:'Archivo',sans-serif;font-weight:800;font-size:1.3rem;color:#fff;white-space:nowrap;}
.logo span{color:var(--copper);}
nav.main ul{display:flex;gap:30px;}
nav.main a{font-size:.94rem;font-weight:600;padding:6px 0;border-bottom:2px solid transparent;}
nav.main a:hover,nav.main a.active{border-color:var(--copper);}
.header-actions{display:flex;align-items:center;gap:12px;}
.phone-chip{font-size:.88rem;font-weight:600;color:var(--warm-white);opacity:.9;}
.nav-toggle{display:none;background:none;border:0;color:#fff;font-size:1.6rem;cursor:pointer;}

/* Sticky WhatsApp */
.wa-float{
  position:fixed;right:22px;bottom:22px;z-index:200;
  background:#25D366;color:#fff;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,.28);
}

/* Hero */
.hero{background:var(--charcoal);color:#fff;position:relative;overflow:hidden;}
.hero .wrap{
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
  padding-top:72px;padding-bottom:64px;position:relative;z-index:2;
}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px;}
.hero-badges span{
  font-size:.78rem;font-weight:600;border:1px solid rgba(255,255,255,.25);
  padding:6px 12px;border-radius:20px;color:#E7E3D8;
}
.hero h1{font-size:3rem;line-height:1.06;margin-bottom:18px;color:#fff;}
.hero p.lead{font-size:1.12rem;color:#C8CBCF;max-width:48ch;margin-bottom:28px;}
.hero .cta-row{display:flex;gap:14px;flex-wrap:wrap;}
.hero-art{
  aspect-ratio:4/5;border-radius:4px;position:relative;overflow:hidden;
  background:
    radial-gradient(circle at 75% 20%, rgba(46,122,174,.65), transparent 55%),
    radial-gradient(circle at 30% 80%, rgba(192,107,44,.5), transparent 55%),
    linear-gradient(160deg,#2B313A,#171A1F);
  display:flex;align-items:flex-end;border:1px solid rgba(255,255,255,.08);
}
.hero-art-tag{
  padding:22px;border-top:3px solid var(--copper);width:100%;
  background:linear-gradient(0deg, rgba(0,0,0,.55), transparent);
}
.hero-art-tag b{display:block;font-family:'Archivo',sans-serif;font-size:1.1rem;}
.hero-art-tag span{font-size:.85rem;color:#C8CBCF;}

/* Trust bar */
.trust-bar{background:var(--copper-light);border-bottom:1px solid var(--line);}
.trust-bar .wrap{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:26px 24px;
}
.trust-item{display:flex;align-items:center;gap:12px;}
.trust-item .ico{
  width:40px;height:40px;border-radius:50%;background:var(--copper);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0;
}
.trust-item b{display:block;font-size:.88rem;}
.trust-item small{color:var(--graphite);font-size:.78rem;}

/* Category grid */
.cat-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;}
.cat-card{
  background:var(--panel);border:1px solid var(--line);border-radius:4px;overflow:hidden;
  transition:box-shadow .15s, transform .15s;
}
.cat-card:hover{box-shadow:var(--shadow);transform:translateY(-3px);}
.cat-photo{
  aspect-ratio:1/1;
  background:linear-gradient(135deg,var(--flame-blue),var(--charcoal));
  position:relative;
}
.cat-photo span{
  position:absolute;bottom:10px;left:10px;background:rgba(29,33,39,.75);color:#fff;
  font-size:.72rem;font-weight:700;padding:4px 9px;border-radius:2px;
}
.cat-body{padding:16px;}
.cat-body h3{font-size:1rem;margin-bottom:4px;}
.cat-body p{font-size:.82rem;color:var(--graphite);}

/* Product grid & cards */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.prod-card{
  display:block;color:inherit;text-decoration:none;
  background:var(--panel);border:1px solid var(--line);position:relative;border-radius:3px;overflow:hidden;
  transition:box-shadow .15s, transform .15s;
}
.prod-card:hover{box-shadow:var(--shadow);transform:translateY(-3px);}
.prod-card::before{
  content:"";position:absolute;top:0;left:0;width:24px;height:24px;z-index:2;
  border-top:3px solid var(--copper);border-left:3px solid var(--copper);
}
.prod-img{
  aspect-ratio:4/3;background:linear-gradient(135deg,#3D7EA6,#1D2127);position:relative;
}
.badge{
  position:absolute;top:10px;right:10px;font-size:.7rem;font-weight:700;
  padding:4px 9px;border-radius:20px;color:#fff;
}
.badge.stock{background:var(--success);}
.badge.featured{background:var(--ember);}
.prod-body{padding:18px;}
.prod-cat{font-size:.75rem;color:var(--flame-blue);font-weight:700;margin-bottom:6px;}
.prod-body h3{font-size:1.02rem;margin-bottom:10px;}
.spec-chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px;}
.spec-chips span{
  font-size:.72rem;border:1px solid var(--line);color:var(--graphite);padding:3px 9px;border-radius:2px;
}
.prod-link{font-size:.88rem;font-weight:700;color:var(--copper-dark);}

/* Filter tabs */
.filter-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:34px;}
.filter-tabs button{
  border:1.5px solid var(--line);background:var(--panel);padding:9px 18px;font-size:.86rem;
  font-weight:600;border-radius:20px;cursor:pointer;color:var(--graphite);
}
.filter-tabs button.active{background:var(--charcoal);border-color:var(--charcoal);color:#fff;}

/* Dark band (about / values) */
.band-dark{background:var(--charcoal);color:#fff;}
.band-dark .section-head p{color:#B9BCC0;}
.values-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:10px;}
.value-card{border:1px solid rgba(255,255,255,.12);padding:22px;border-radius:4px;}
.value-card b{display:block;margin-bottom:8px;font-family:'Archivo',sans-serif;}
.value-card p{color:#B9BCC0;font-size:.92rem;}

/* CTA band */
.cta-band{background:var(--copper);color:#fff;padding:52px 0;}
.cta-band .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px;}
.cta-band h2{color:#fff;font-size:1.6rem;margin-bottom:6px;}
.cta-band p{opacity:.92;}

/* Breadcrumbs */
.breadcrumbs{background:var(--copper-light);padding:14px 0;font-size:.85rem;}
.breadcrumbs a{color:var(--copper-dark);font-weight:600;}
.breadcrumbs span{color:var(--graphite);}

/* Product detail */
.pd-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;padding:56px 0;}
.gallery-main{
  aspect-ratio:4/3;background:linear-gradient(135deg,#3D7EA6,#1D2127);border-radius:4px;margin-bottom:14px;
}
.gallery-thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;}
.gallery-thumbs div{aspect-ratio:1/1;background:linear-gradient(135deg,#4d5966,#1D2127);border-radius:3px;opacity:.75;}
.pd-cat{color:var(--flame-blue);font-weight:700;font-size:.85rem;margin-bottom:8px;}
.pd-grid h1{font-size:2rem;margin-bottom:16px;}
.pd-grid p.desc{color:var(--graphite);margin-bottom:26px;}
.spec-table{width:100%;border-collapse:collapse;margin-bottom:28px;}
.spec-table tr{border-bottom:1px solid var(--line);}
.spec-table td{padding:10px 4px;font-size:.92rem;}
.spec-table td:first-child{color:var(--graphite);width:40%;}
.spec-table td:last-child{font-weight:600;}

/* Forms */
.form-card{background:var(--panel);border:1px solid var(--line);border-radius:4px;padding:28px;}
.form-row{margin-bottom:16px;}
.form-row label{display:block;font-size:.86rem;font-weight:600;margin-bottom:6px;}
.form-row input,.form-row textarea,.form-row select{
  width:100%;padding:11px 12px;border:1.5px solid var(--line);border-radius:3px;
  font-family:inherit;font-size:.94rem;background:#fff;
}
.form-row textarea{resize:vertical;min-height:110px;}
.form-row input:focus,.form-row textarea:focus,.form-row select:focus{outline:2px solid var(--flame-blue);outline-offset:1px;}

/* FAQ accordion */
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;text-align:left;background:none;border:0;padding:18px 4px;
  font-family:'Archivo',sans-serif;font-weight:700;font-size:1rem;cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;color:var(--charcoal);
}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease;}
.faq-a p{padding:0 4px 18px;color:var(--graphite);font-size:.94rem;}
.faq-item.open .faq-a{max-height:200px;}
.faq-item.open .faq-q .chev{transform:rotate(45deg);}
.chev{transition:transform .2s;font-size:1.2rem;color:var(--copper);}

/* Hours table */
.hours-table{width:100%;border-collapse:collapse;}
.hours-table td{padding:10px 4px;border-bottom:1px solid var(--line);font-size:.92rem;}
.hours-table td:first-child{font-weight:600;width:50%;}

/* Contact split */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;}
.contact-info-card{background:var(--charcoal);color:#fff;border-radius:4px;padding:30px;}
.contact-info-card h3{color:#fff;margin-bottom:18px;}
.contact-line{display:flex;gap:12px;margin-bottom:16px;font-size:.94rem;}
.contact-line b{color:var(--copper);}
.map-box{aspect-ratio:16/9;background:linear-gradient(135deg,#3D7EA6,#1D2127);border-radius:4px;margin-top:20px;display:flex;align-items:center;justify-content:center;color:#C8CBCF;font-size:.85rem;}

/* Footer */
footer.site{background:var(--charcoal);color:#9A9DA2;padding:44px 0 28px;font-size:.88rem;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px;margin-bottom:30px;}
.footer-grid h4{color:#fff;font-size:.92rem;margin-bottom:14px;}
.footer-grid a{display:block;color:#B9BCC0;margin-bottom:8px;}
.footer-grid a:hover{color:var(--copper);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;}

/* ===== Admin ===== */
.admin-shell{display:grid;grid-template-columns:230px 1fr;min-height:100vh;}
.admin-sidebar{background:var(--charcoal);color:#fff;padding:26px 18px;}
.admin-sidebar .logo{margin-bottom:34px;display:block;}
.admin-sidebar nav a{
  display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:4px;
  font-size:.9rem;font-weight:600;color:#C8CBCF;margin-bottom:4px;
}
.admin-sidebar nav a.active,.admin-sidebar nav a:hover{background:var(--charcoal-soft);color:#fff;}
.admin-main{padding:32px 36px;background:var(--warm-white);}
.admin-topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px;}
.admin-topbar h1{font-size:1.5rem;}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:34px;}
.stat-card{background:#fff;border:1px solid var(--line);border-radius:4px;padding:20px;}
.stat-card .num{font-family:'Archivo',sans-serif;font-size:1.9rem;font-weight:800;}
.stat-card .lbl{font-size:.82rem;color:var(--graphite);}
.admin-panel{background:#fff;border:1px solid var(--line);border-radius:4px;overflow:hidden;}
.admin-panel-head{display:flex;justify-content:space-between;align-items:center;padding:18px 20px;border-bottom:1px solid var(--line);}
table.admin-table{width:100%;border-collapse:collapse;}
table.admin-table th{
  text-align:left;font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;
  color:var(--graphite);padding:12px 20px;border-bottom:1px solid var(--line);background:#FAF8F3;
}
table.admin-table td{padding:14px 20px;border-bottom:1px solid var(--line);font-size:.9rem;vertical-align:middle;}
.tag-pill{font-size:.72rem;font-weight:700;padding:4px 10px;border-radius:20px;background:var(--copper-light);color:var(--copper-dark);}
.status-dot{width:8px;height:8px;border-radius:50%;display:inline-block;margin-right:6px;}
.status-dot.on{background:var(--success);}
.status-dot.off{background:#C4C4C4;}
.row-actions a{font-size:.82rem;font-weight:600;color:var(--flame-blue);margin-right:12px;}
.admin-form-grid{display:grid;grid-template-columns:2fr 1fr;gap:24px;}

/* Responsive */
@media (max-width:980px){
  .hero .wrap{grid-template-columns:1fr;}
  .cat-grid{grid-template-columns:repeat(3,1fr);}
  .prod-grid{grid-template-columns:repeat(2,1fr);}
  .trust-bar .wrap{grid-template-columns:repeat(2,1fr);}
  .values-grid{grid-template-columns:1fr;}
  .pd-grid{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:repeat(2,1fr);}
  .admin-shell{grid-template-columns:1fr;}
  .admin-sidebar{display:none;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .admin-form-grid{grid-template-columns:1fr;}
}
@media (max-width:640px){
  .phone-chip{display:none;}
  .nav-toggle{display:block;}
  nav.main{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:var(--charcoal);border-bottom:3px solid var(--copper);
  }
  nav.main.is-open{display:block;}
  nav.main ul{flex-direction:column;gap:0;padding:8px 24px 16px;}
  nav.main li{width:100%;}
  nav.main a{display:block;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.1);}
  .cat-grid{grid-template-columns:repeat(2,1fr);}
  .prod-grid{grid-template-columns:1fr;}
  .hero h1{font-size:2.2rem;}
  .trust-bar .wrap{grid-template-columns:1fr;}
  .gallery-thumbs{grid-template-columns:repeat(4,1fr);}
}