:root{
  color-scheme: dark;
  --bg:#0a0a0a;
  --bg-2:#161616;
  --bg-3:#1f1f1f;
  --line:#333333;
  --line-hi:#4a4a4a;
  --text:#ffffff;
  --text-2:#b8b8b8;
  --text-3:#7a7a7a;
  --hot:#ff5722;
  --hot-2:#ffb627;
  --steel:#8a98a3;
  --steel-2:#c0ccd5;
}
*{box-sizing:border-box;margin:0;padding:0}
html{background:#0a0a0a !important;color-scheme:dark}
html,body{background:#0a0a0a;color:#ffffff;font-family:'Inter',sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
/* Force dark even when iOS / preview tries to invert */
@media (prefers-color-scheme: light){
  html,body{background:#0a0a0a !important;color:#ffffff !important}
}
body{
  background-image:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(255,77,28,0.08), transparent),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(125,139,150,0.06), transparent);
  background-attachment:fixed;
  min-height:100vh;
}

/* === HERO with background image === */
.hero{position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:url("/assets/photos/san-pham/kho-thep-hinh-tong-hop.jpg");
  background-size:cover;background-position:center;
  opacity:.4;
  filter:saturate(.85) contrast(1.1);
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(180deg, rgba(10,10,10,.25) 0%, rgba(10,10,10,.75) 100%);
}
.hero > *{position:relative;z-index:2}
::selection{background:var(--hot);color:#000}

/* === Noise overlay === */
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.04;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* === NAV === */
.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(10,10,10,0.85);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:1400px;margin:0 auto;padding:14px 32px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{
  display:flex;align-items:center;gap:14px;font-family:'Archivo Black',sans-serif;
  letter-spacing:.02em;
}
.brand-mark{
  width:38px;height:38px;border:2px solid var(--hot);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;color:var(--hot);position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:-2px;border:2px solid var(--hot);
  transform:translate(3px,3px);opacity:.35;
}
.brand-text{font-size:15px;line-height:1.1}
.brand-text span{color:var(--text-3);font-weight:400;font-family:'JetBrains Mono',mono}
.nav-links{display:flex;gap:28px;font-size:13px;font-weight:500;text-transform:uppercase;letter-spacing:.08em}
.nav-links a{color:var(--text-2);text-decoration:none;transition:color .2s;position:relative;padding:6px 0}
.nav-links a:hover{color:var(--hot)}
.nav-cta{
  background:var(--hot);color:#000;padding:10px 20px;font-weight:700;
  font-size:12px;text-transform:uppercase;letter-spacing:.1em;text-decoration:none;
  border:1px solid var(--hot);transition:all .2s;
}
.nav-cta:hover{background:transparent;color:var(--hot)}
.nav-hotlines{display:flex;flex-direction:column;gap:3px}
.nav-hot{
  display:flex;flex-direction:column;align-items:flex-end;gap:1px;
  background:var(--hot);color:#000;padding:5px 12px;text-decoration:none;
  border:1px solid var(--hot);transition:all .2s;min-width:200px;
}
.nav-hot:hover{background:transparent;color:var(--hot)}
.nav-hot-num{font-family:'Archivo Black',sans-serif;font-size:13px;letter-spacing:.02em;line-height:1.1}
.nav-hot-tag{font-family:'JetBrains Mono',mono;font-size:9px;letter-spacing:.04em;opacity:.85;text-transform:uppercase}
@media(max-width:768px){
  .nav-inner{padding:12px 16px}
  .nav-links{display:none}
  .nav-cta{padding:8px 14px;font-size:11px}
  .nav-hotlines{display:none}
  .nav-hot-mobile{
    display:flex;background:var(--hot);color:#000;padding:8px 14px;
    font-family:'Archivo Black',sans-serif;font-size:12px;text-decoration:none;
    align-items:center;gap:4px;
  }
}

/* === HERO === */
.hero{
  position:relative;padding:120px 32px 80px;max-width:1400px;margin:0 auto;
  border-bottom:1px solid var(--line);
}
.hero-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:end;
}
.hero-tag{
  font-family:'JetBrains Mono',mono;font-size:12px;color:var(--hot);
  text-transform:uppercase;letter-spacing:.15em;margin-bottom:24px;
  display:flex;align-items:center;gap:10px;
}
.hero-tag::before{content:"";width:30px;height:1px;background:var(--hot)}
.hero h1{
  font-family:'Archivo Black',sans-serif;
  font-size:clamp(40px,7vw,96px);line-height:.95;letter-spacing:-.02em;
  text-transform:uppercase;
}
.hero h1 .orange{color:var(--hot);font-style:italic;display:inline-block;transform:translateX(-4px)}
.hero h1 .outline{
  -webkit-text-stroke:3px #ffffff;color:transparent;
  /* Fallback for browsers without -webkit-text-stroke support */
  text-shadow: -2px -2px 0 #ffffff, 2px -2px 0 #ffffff, -2px 2px 0 #ffffff, 2px 2px 0 #ffffff;
}
@supports (-webkit-text-stroke: 3px #fff) {
  .hero h1 .outline{ text-shadow:none; color:transparent; }
}
.hero-right{padding-bottom:14px}
.hero-meta{
  font-family:'JetBrains Mono',mono;font-size:12px;color:var(--text-3);
  text-transform:uppercase;letter-spacing:.1em;margin-bottom:16px;
}
.hero-desc{font-size:15px;color:var(--text-2);max-width:420px;line-height:1.7;margin-bottom:28px}
.hero-stats{display:flex;gap:32px;border-top:1px solid var(--line);padding-top:24px}
.stat-num{font-family:'Archivo Black',sans-serif;font-size:32px;color:#ffffff}
.stat-lbl{font-family:'JetBrains Mono',mono;font-size:10px;color:#999999;text-transform:uppercase;letter-spacing:.1em;margin-top:4px}
@media(max-width:900px){
  .hero{padding:60px 16px 50px}
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .hero-right{padding-bottom:0}
  .hero-stats{gap:24px}
  .stat-num{font-size:24px}
}

/* === BRAND STRIP === */
.brand-strip{
  background:var(--bg-2);border-bottom:1px solid var(--line);
  padding:24px 32px;display:flex;align-items:center;justify-content:center;gap:60px;
  font-family:'JetBrains Mono',mono;font-size:11px;color:var(--text-3);
  text-transform:uppercase;letter-spacing:.15em;flex-wrap:wrap;
}
.brand-strip span{color:var(--steel-2)}
.brand-strip b{color:var(--hot);font-weight:700}

/* === CATEGORIES === */
.cats{
  max-width:1400px;margin:0 auto;padding:80px 32px;
}
.section-head{
  display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:48px;gap:24px;flex-wrap:wrap;
}
.section-num{
  font-family:'JetBrains Mono',mono;font-size:11px;color:var(--hot);
  text-transform:uppercase;letter-spacing:.2em;margin-bottom:8px;
}
.section-title{
  font-family:'Archivo Black',sans-serif;font-size:clamp(28px,4vw,52px);
  text-transform:uppercase;line-height:.95;letter-spacing:-.01em;
}
.section-desc{color:var(--text-2);max-width:420px;font-size:14px;line-height:1.7}

.cat-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);
}
.cat{
  background:var(--bg-2);padding:32px 24px;cursor:pointer;
  transition:all .25s ease;position:relative;overflow:hidden;
}
.cat:hover{background:var(--bg-3)}
.cat::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:3px;
  background:var(--hot);transform:scaleX(0);transform-origin:left;
  transition:transform .3s ease;
}
.cat:hover::before{transform:scaleX(1)}
.cat-icon{
  width:48px;height:48px;margin-bottom:24px;color:var(--steel-2);
  transition:color .2s;
}
.cat:hover .cat-icon{color:var(--hot)}
.cat-code{
  font-family:'JetBrains Mono',mono;font-size:10px;color:var(--text-3);
  letter-spacing:.15em;margin-bottom:6px;
}
.cat-name{
  font-family:'Archivo Black',sans-serif;font-size:18px;
  text-transform:uppercase;line-height:1.1;margin-bottom:12px;letter-spacing:-.01em;
}
.cat-count{
  font-family:'JetBrains Mono',mono;font-size:12px;color:var(--hot);
  display:flex;align-items:center;gap:8px;
}
.cat-count::after{content:"→";transition:transform .25s}
.cat:hover .cat-count::after{transform:translateX(4px)}
@media(max-width:768px){
  .cats{padding:50px 16px}
  .cat{padding:24px 18px}
  .cat-name{font-size:15px}
}

/* === CATALOG === */
.catalog{
  max-width:1400px;margin:0 auto;padding:40px 32px 100px;
}
.filter-bar{
  background:var(--bg-2);border:1px solid var(--line);
  padding:20px;margin-bottom:24px;
  display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center;
}
.search-box{position:relative}
.search-box input{
  width:100%;background:var(--bg);border:1px solid var(--line);
  color:var(--text);padding:14px 18px 14px 48px;font-family:'JetBrains Mono',mono;
  font-size:13px;outline:none;transition:border-color .2s;
}
.search-box input:focus{border-color:var(--hot)}
.search-box input::placeholder{color:var(--text-3)}
.search-box svg{
  position:absolute;left:16px;top:50%;transform:translateY(-50%);
  color:var(--text-3);width:18px;height:18px;
}
.filter-pills{display:flex;gap:8px;flex-wrap:wrap}
.pill{
  background:transparent;border:1px solid var(--line);color:var(--text-2);
  padding:8px 14px;font-size:11px;font-family:'JetBrains Mono',mono;
  text-transform:uppercase;letter-spacing:.08em;cursor:pointer;transition:all .15s;
  white-space:nowrap;
}
.pill:hover{border-color:var(--text-2);color:var(--text)}
.pill.active{background:var(--hot);border-color:var(--hot);color:#000;font-weight:700}
.results-meta{
  font-family:'JetBrains Mono',mono;font-size:11px;color:var(--text-3);
  text-transform:uppercase;letter-spacing:.15em;margin-bottom:16px;
  display:flex;justify-content:space-between;align-items:center;
}
.results-meta b{color:var(--hot)}

/* Product table */
.products{
  border:1px solid var(--line);background:var(--bg-2);overflow:hidden;
}
.prod-head{
  display:grid;grid-template-columns:80px 1fr 140px 80px 120px 140px;
  gap:16px;padding:14px 20px;background:var(--bg-3);
  font-family:'JetBrains Mono',mono;font-size:10px;color:var(--text-3);
  text-transform:uppercase;letter-spacing:.15em;border-bottom:1px solid var(--line);
}
.prod-row{
  display:grid;grid-template-columns:80px 1fr 140px 80px 120px 140px;
  gap:16px;padding:14px 20px;border-bottom:1px solid var(--line);
  font-size:13px;align-items:center;transition:background .15s;
}
.prod-row:last-child{border-bottom:0}
.prod-row:hover{background:var(--bg-3)}
.prod-no{font-family:'JetBrains Mono',mono;color:var(--text-3);font-size:11px}
.prod-name{color:var(--text);line-height:1.4}
.prod-code{
  font-family:'JetBrains Mono',mono;color:var(--hot-2);font-size:12px;
  background:rgba(255,182,39,0.08);padding:4px 8px;display:inline-block;
  border:1px solid rgba(255,182,39,0.2);
}
.prod-unit{font-family:'JetBrains Mono',mono;color:var(--text-2);font-size:12px;text-align:center}
.prod-weight{font-family:'JetBrains Mono',mono;color:var(--steel-2);font-weight:500;text-align:right}
.prod-weight span{color:var(--text-3);font-size:11px;margin-left:4px}
.prod-cta{
  background:transparent;border:1px solid var(--line-hi);color:var(--text);
  padding:8px 12px;font-size:10px;font-family:'JetBrains Mono',mono;
  text-transform:uppercase;letter-spacing:.1em;cursor:pointer;text-decoration:none;
  text-align:center;transition:all .15s;
}
.prod-cta:hover{background:var(--hot);border-color:var(--hot);color:#000;font-weight:700}

/* Mobile: cards */
@media(max-width:900px){
  .catalog{padding:32px 16px 60px}
  .filter-bar{grid-template-columns:1fr;padding:14px}
  .prod-head{display:none}
  .prod-row{
    grid-template-columns:1fr;gap:8px;padding:18px;
    border-bottom:1px solid var(--line);
  }
  .prod-no{font-size:10px;color:var(--text-3)}
  .prod-name{font-size:14px;font-weight:500}
  .prod-meta-row{
    display:flex;gap:12px;flex-wrap:wrap;align-items:center;
    padding-top:4px;
  }
  .prod-weight{text-align:left}
  .prod-cta{align-self:flex-start;margin-top:8px}
}

/* Pagination */
.pager{
  display:flex;justify-content:center;align-items:center;gap:6px;
  padding:32px 0 0;
}
.pager button{
  background:var(--bg-2);border:1px solid var(--line);color:var(--text-2);
  width:38px;height:38px;font-family:'JetBrains Mono',mono;font-size:12px;
  cursor:pointer;transition:all .15s;
}
.pager button:hover:not(:disabled){border-color:var(--hot);color:var(--hot)}
.pager button.active{background:var(--hot);border-color:var(--hot);color:#000;font-weight:700}
.pager button:disabled{opacity:.3;cursor:not-allowed}
.pager .info{font-family:'JetBrains Mono',mono;font-size:11px;color:var(--text-3);margin:0 12px}

/* === CONTACT === */
.contact{
  background:var(--bg-2);border-top:1px solid var(--line);
  padding:80px 32px;
}
.contact-inner{max-width:1400px;margin:0 auto}
.contact-title{
  font-family:'Archivo Black',sans-serif;font-size:clamp(36px,6vw,72px);
  text-transform:uppercase;line-height:.95;margin-bottom:48px;
  letter-spacing:-.02em;
}
.contact-title .orange{color:var(--hot)}
.contact-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:1px;
  background:var(--line);border:1px solid var(--line);
}
.contact-card{
  background:var(--bg);padding:40px 32px;
}
.cc-head{
  display:flex;align-items:center;gap:16px;margin-bottom:28px;
  padding-bottom:20px;border-bottom:1px solid var(--line);
}
.cc-logo{
  width:48px;height:48px;border:2px solid var(--hot);
  display:flex;align-items:center;justify-content:center;
  font-family:'Archivo Black',sans-serif;font-size:14px;color:var(--hot);
}
.cc-name{font-family:'Archivo Black',sans-serif;font-size:20px;text-transform:uppercase;line-height:1.1}
.cc-name span{font-family:'JetBrains Mono',mono;font-size:11px;color:var(--text-3);display:block;margin-top:6px;letter-spacing:.1em;font-weight:400}
.cc-row{display:grid;grid-template-columns:100px 1fr;gap:16px;padding:10px 0;border-bottom:1px solid var(--line);font-size:13px}
.cc-row:last-child{border-bottom:0}
.cc-lbl{font-family:'JetBrains Mono',mono;font-size:10px;color:var(--text-3);text-transform:uppercase;letter-spacing:.1em;padding-top:3px}
.cc-val{color:var(--text);line-height:1.55}
.cc-val a{color:var(--hot);text-decoration:none}
.cc-val a:hover{text-decoration:underline}
@media(max-width:768px){
  .contact{padding:50px 16px}
  .contact-grid{grid-template-columns:1fr}
  .contact-card{padding:28px 20px}
  .cc-row{grid-template-columns:1fr;gap:4px}
}

/* === FOOTER === */
.footer{
  border-top:1px solid var(--line);padding:32px;
  max-width:1400px;margin:0 auto;
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;
  font-family:'JetBrains Mono',mono;font-size:11px;color:var(--text-3);
  text-transform:uppercase;letter-spacing:.1em;
}

/* === MODAL === */
.modal-bg{
  position:fixed;inset:0;background:rgba(0,0,0,.85);z-index:200;
  display:none;align-items:center;justify-content:center;padding:20px;
  backdrop-filter:blur(8px);
}
.modal-bg.open{display:flex}
.modal{
  background:var(--bg-2);border:1px solid var(--line-hi);max-width:500px;width:100%;
  padding:32px;animation:popIn .3s ease;
}
@keyframes popIn{from{opacity:0;transform:translateY(20px) scale(.95)}to{opacity:1;transform:none}}
.modal-head{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:24px}
.modal-title{font-family:'Archivo Black',sans-serif;font-size:18px;text-transform:uppercase;line-height:1.1}
.modal-close{
  background:none;border:1px solid var(--line);color:var(--text-2);
  width:32px;height:32px;cursor:pointer;font-size:18px;line-height:1;
}
.modal-close:hover{border-color:var(--hot);color:var(--hot)}
.modal-prod{padding:16px;background:var(--bg);border:1px solid var(--line);margin-bottom:24px;font-size:13px}
.modal-prod .pp-name{color:var(--text);margin-bottom:8px;line-height:1.4}
.modal-prod .pp-meta{font-family:'JetBrains Mono',mono;font-size:11px;color:var(--text-3)}
.modal-prod .pp-meta b{color:var(--hot-2)}
.modal-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.modal-btn{
  padding:14px;text-align:center;text-decoration:none;font-size:12px;
  font-family:'JetBrains Mono',mono;text-transform:uppercase;letter-spacing:.1em;
  font-weight:700;transition:all .15s;
}
.modal-btn.phone{background:var(--hot);color:#000}
.modal-btn.phone:hover{background:#fff}
.modal-btn.zalo{background:transparent;border:1px solid var(--steel-2);color:var(--steel-2)}
.modal-btn.zalo:hover{background:var(--steel-2);color:#000}

/* === LOGOS === */
.nav-logo{
  height:34px;width:auto;display:block;
  filter:drop-shadow(0 0 8px rgba(255,255,255,0.05));
}
.nav-logo-pnm{height:52px}
.nav-logo-mega{height:52px}
.nav-x{
  font-family:'Archivo Black',sans-serif;color:var(--hot);
  font-size:18px;opacity:.7;margin:0 4px;
}
@media(max-width:768px){
  .nav-logo-pnm{height:42px}
  .nav-logo-mega{height:42px}
  .nav-x{font-size:14px;margin:0 2px}
}

.hero-logos{
  display:flex;align-items:center;justify-content:center;gap:40px;
  padding:20px 0 60px;border-bottom:1px solid var(--line);margin-bottom:60px;
  flex-wrap:wrap;
}
.hero-logo-wrap{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  position:relative;
}
.hero-logo-wrap::before{
  content:"";position:absolute;inset:-20px -30px;
  background:radial-gradient(ellipse at center, rgba(168,180,189,0.06), transparent 70%);
  z-index:-1;
}
.hero-logo-wrap img{
  height:90px;width:auto;display:block;
  filter:drop-shadow(0 4px 20px rgba(255,255,255,0.08));
  transition:filter .3s;
}
.hero-logo-wrap:hover img{
  filter:drop-shadow(0 4px 24px rgba(255,77,28,0.25));
}
.hero-logo-label{
  font-family:'JetBrains Mono',mono;font-size:10px;color:var(--text-3);
  text-transform:uppercase;letter-spacing:.25em;
}
.hero-cross{
  font-family:'Archivo Black',sans-serif;color:var(--hot);
  font-size:48px;line-height:1;opacity:.6;
}
@media(max-width:768px){
  .hero-logos{gap:24px;padding:10px 0 40px;margin-bottom:40px}
  .hero-logo-wrap img{height:56px}
  .hero-cross{font-size:32px}
  .hero-logo-label{font-size:9px;letter-spacing:.2em}
}

.cc-logo-img{
  height:60px;width:auto;display:block;
  filter:drop-shadow(0 2px 8px rgba(255,255,255,0.05));
  flex-shrink:0;
}
@media(max-width:768px){
  .cc-logo-img{height:48px}
}

/* === BLOCK === */

.prod-info{max-width:1400px;margin:0 auto;padding:80px 32px;border-top:1px solid var(--line)}
.pi-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(360px,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);
}
.pi-card{background:var(--bg-2);padding:36px 28px;transition:all .25s;position:relative;overflow:hidden}
.pi-card::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:3px;
  background:var(--hot);transform:scaleX(0);transform-origin:left;
  transition:transform .3s;
}
.pi-card:hover{background:var(--bg-3)}
.pi-card:hover::before{transform:scaleX(1)}
.pi-head{margin-bottom:20px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.pi-code{
  font-family:'JetBrains Mono',mono;font-size:11px;color:var(--hot);
  margin-bottom:10px;letter-spacing:.18em;
}
.pi-name{
  font-family:'Archivo Black',sans-serif;font-size:24px;
  text-transform:uppercase;line-height:1;margin-bottom:8px;letter-spacing:-.01em;
}
.pi-tag{
  font-family:'JetBrains Mono',mono;font-size:11px;color:var(--text-3);
  letter-spacing:.1em;text-transform:uppercase;
}
.pi-desc{font-size:14px;line-height:1.7;color:var(--text-2);margin-bottom:22px}
.pi-meta{
  background:var(--bg-3);padding:14px 18px;margin-bottom:22px;
  border-left:2px solid var(--hot);
}
.pi-meta-row{
  display:flex;justify-content:space-between;align-items:baseline;gap:12px;
  padding:6px 0;font-family:'JetBrains Mono',mono;font-size:12px;
}
.pi-meta-row span{color:var(--text-3);text-transform:uppercase;letter-spacing:.08em;font-size:10px;white-space:nowrap}
.pi-meta-row b{color:var(--text);font-weight:600;text-align:right}
.pi-uses-title{
  font-family:'JetBrains Mono',mono;font-size:11px;color:var(--hot);
  text-transform:uppercase;letter-spacing:.12em;margin-bottom:10px;
}
.pi-uses ul{list-style:none}
.pi-uses li{
  font-size:13px;line-height:1.7;color:var(--text-2);
  padding-left:20px;position:relative;margin-bottom:4px;
}
.pi-uses li::before{
  content:"→";position:absolute;left:0;color:var(--hot);font-weight:700;
}
@media(max-width:768px){
  .prod-info{padding:50px 16px}
  .pi-card{padding:24px 20px}
  .pi-name{font-size:20px}
}

/* === BLOCK === */

.calc{max-width:1400px;margin:0 auto;padding:80px 32px;border-top:1px solid var(--line)}
.calc-wrap{background:var(--bg-2);border:1px solid var(--line);overflow:hidden}
.calc-tabs{display:flex;border-bottom:1px solid var(--line);background:var(--bg-3);flex-wrap:wrap}
.calc-tab{flex:1;min-width:120px;padding:18px 12px;text-align:center;cursor:pointer;font-family:'JetBrains Mono',mono;
  font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:var(--text-3);
  border:none;border-bottom:2px solid transparent;border-right:1px solid var(--line);
  background:transparent;transition:all .2s}
.calc-tab:last-child{border-right:none}
.calc-tab:hover{color:var(--text-2);background:var(--bg-2)}
.calc-tab.active{color:var(--hot);border-bottom-color:var(--hot);background:var(--bg-2)}
.calc-panel{padding:32px;display:none}
.calc-panel.active{display:block}
.calc-formula{
  font-family:'JetBrains Mono',mono;font-size:12px;color:var(--text-2);
  background:var(--bg-3);border-left:3px solid var(--hot);padding:14px 16px;
  margin-bottom:28px;letter-spacing:.02em;line-height:1.6}
.calc-formula b{color:var(--hot);font-weight:700}
.calc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;margin-bottom:24px}
.calc-field label{display:block;font-family:'JetBrains Mono',mono;font-size:10px;color:var(--text-3);
  text-transform:uppercase;letter-spacing:.15em;margin-bottom:8px}
.calc-field input,.calc-field select{
  width:100%;padding:12px 14px;background:var(--bg-3);border:1px solid var(--line);
  color:var(--text);font-family:'JetBrains Mono',mono;font-size:14px;transition:border-color .2s;
  appearance:none;-webkit-appearance:none}
.calc-field select{
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'><path fill='%23ff5722' d='M0 0l5 6 5-6z'/></svg>");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:36px}
.calc-field input:focus,.calc-field select:focus{outline:none;border-color:var(--hot)}
.calc-field input[readonly]{color:var(--hot);cursor:not-allowed}
.calc-actions{display:flex;gap:12px;margin-bottom:24px;flex-wrap:wrap}
.calc-btn{padding:14px 28px;border:1px solid var(--hot);font-family:'JetBrains Mono',mono;
  font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.12em;
  cursor:pointer;transition:all .2s}
.calc-btn-primary{background:var(--hot);color:#000}
.calc-btn-primary:hover{background:transparent;color:var(--hot)}
.calc-btn-secondary{background:transparent;color:var(--text-2);border-color:var(--line-hi)}
.calc-btn-secondary:hover{color:var(--hot);border-color:var(--hot)}
.calc-result{background:var(--bg-3);border:1px solid var(--line);padding:20px;display:none}
.calc-result.show{display:block}
.calc-row{display:flex;justify-content:space-between;align-items:baseline;padding:10px 0;
  border-bottom:1px dashed var(--line);font-family:'JetBrains Mono',mono;font-size:13px;gap:12px}
.calc-row:last-child{border-bottom:none}
.calc-row span:first-child{color:var(--text-3);text-transform:uppercase;letter-spacing:.1em;font-size:11px}
.calc-row b{color:var(--text);font-weight:700;font-size:15px;text-align:right;white-space:nowrap}
.calc-row.big b{color:var(--hot);font-family:'Archivo Black',sans-serif;font-size:22px;letter-spacing:-.01em}
.calc-note{font-family:'JetBrains Mono',mono;font-size:10px;color:var(--text-3);
  margin-top:12px;letter-spacing:.05em;line-height:1.6}
@media(max-width:768px){
  .calc{padding:50px 16px}
  .calc-panel{padding:20px}
  .calc-tab{font-size:10px;padding:14px 6px;letter-spacing:.06em;min-width:90px}
}

/* === BLOCK === */

.quote{max-width:1400px;margin:0 auto;padding:80px 32px;border-top:1px solid var(--line)}
.qb-wrap{background:var(--bg-2);border:1px solid var(--line)}
.qb-customer{
  padding:24px 28px;border-bottom:1px solid var(--line);
  display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;
}
.qb-field label{
  display:block;font-family:'JetBrains Mono',mono;font-size:10px;color:var(--text-3);
  text-transform:uppercase;letter-spacing:.15em;margin-bottom:6px;
}
.qb-field input{
  width:100%;padding:10px 12px;background:var(--bg-3);border:1px solid var(--line);
  color:var(--text);font-family:'Inter',sans-serif;font-size:13px;
}
.qb-field input:focus{outline:none;border-color:var(--hot)}
.qb-custom{border-bottom:1px solid var(--line)}
.qb-custom-head{
  padding:14px 28px;background:var(--bg-3);cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;
  font-family:'JetBrains Mono',mono;font-size:12px;color:var(--hot);
  text-transform:uppercase;letter-spacing:.1em;transition:background .2s;
}
.qb-custom-head:hover{background:var(--bg-2)}
.qb-custom-title{font-size:15px;font-weight:700;letter-spacing:.05em}
.qb-custom-toggle{
  font-family:'Archivo Black',sans-serif;font-size:20px;line-height:1;
  width:24px;height:24px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--hot);border-radius:4px;
}
.qb-custom-body{display:none;padding:18px 28px 24px}
.qb-custom-body.show{display:block}
.qb-ctabs{display:flex;gap:1px;background:var(--line);border:1px solid var(--line);margin-bottom:16px;flex-wrap:wrap}
.qb-ctab{
  flex:1;min-width:90px;padding:10px 8px;background:var(--bg-2);border:none;cursor:pointer;
  font-family:'JetBrains Mono',mono;font-size:11px;color:var(--text-3);
  text-transform:uppercase;letter-spacing:.08em;transition:all .2s;
}
.qb-ctab:hover{color:var(--text-2);background:var(--bg-3)}
.qb-ctab.active{color:var(--hot);background:var(--bg-3);box-shadow:inset 0 -2px 0 var(--hot)}
.qb-cform{display:none}
.qb-cform.active{display:block}
.qb-cformula{
  font-family:'JetBrains Mono',mono;font-size:11px;color:var(--text-2);
  background:var(--bg-3);border-left:3px solid var(--hot);padding:8px 12px;margin-bottom:14px;
}
.qb-cformula b{color:var(--hot)}
.qb-cgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px;margin-bottom:14px}
.qb-cgrid select{
  width:100%;padding:10px 12px;background:var(--bg-3);border:1px solid var(--line);
  color:var(--text);font-family:'JetBrains Mono',mono;font-size:12px;
}
.qb-cactions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.qb-cresult{
  font-family:'JetBrains Mono',mono;font-size:13px;color:var(--text-3);
}
.qb-cresult b{color:var(--hot)}
.qb-search{
  padding:24px 28px;border-bottom:1px solid var(--line);position:relative;
}
.qb-search-box{position:relative}
.qb-search-input{
  width:100%;padding:14px 16px 14px 44px;background:var(--bg-3);border:1px solid var(--line);
  color:var(--text);font-family:'Inter',sans-serif;font-size:14px;
}
.qb-search-icon{
  position:absolute;left:14px;top:50%;transform:translateY(-50%);
  color:var(--hot);font-family:'JetBrains Mono',mono;font-size:14px;font-weight:700;
}
.qb-search-input:focus{outline:none;border-color:var(--hot)}
.qb-results{
  position:absolute;top:calc(100% - 4px);left:28px;right:28px;
  background:var(--bg-3);border:1px solid var(--hot);max-height:300px;overflow-y:auto;
  z-index:20;display:none;
}
.qb-results.show{display:block}
.qb-result-item{
  padding:10px 14px;cursor:pointer;border-bottom:1px solid var(--line);
  display:flex;justify-content:space-between;gap:14px;align-items:center;
  font-size:13px;transition:background .15s;
}
.qb-result-item:hover{background:var(--bg-2)}
.qb-result-item:last-child{border-bottom:none}
.qb-result-name{color:var(--text-2);flex:1}
.qb-result-meta{
  font-family:'JetBrains Mono',mono;font-size:11px;color:var(--hot);white-space:nowrap;
}
.qb-table-wrap{padding:24px 28px;overflow-x:auto}
.qb-table{width:100%;border-collapse:collapse;font-size:13px}
.qb-table thead th{
  background:var(--bg-3);color:var(--hot);font-family:'JetBrains Mono',mono;
  font-size:10px;text-transform:uppercase;letter-spacing:.1em;font-weight:700;
  padding:10px 8px;text-align:left;border:1px solid var(--line);
}
.qb-table tbody td{
  padding:8px;border:1px solid var(--line);color:var(--text-2);vertical-align:middle;
}
.qb-table tbody td.num{text-align:right;font-family:'JetBrains Mono',mono}
.qb-table .qb-input{
  width:100%;padding:6px 8px;background:var(--bg-3);border:1px solid var(--line);
  color:var(--text);font-family:'JetBrains Mono',mono;font-size:13px;text-align:right;
  -moz-appearance:textfield;
}
.qb-table .qb-input::-webkit-outer-spin-button,
.qb-table .qb-input::-webkit-inner-spin-button{
  -webkit-appearance:none;margin:0;
}
.qb-table .qb-input:focus{outline:none;border-color:var(--hot);background:var(--bg-2)}
.qb-table .qb-del{
  background:transparent;border:1px solid var(--line);color:var(--text-3);cursor:pointer;
  padding:4px 10px;font-size:12px;border-radius:3px;transition:all .2s;
}
.qb-table .qb-del:hover{border-color:var(--hot);color:var(--hot)}
.qb-empty{
  text-align:center;padding:40px 20px;color:var(--text-3);font-style:italic;
  font-size:13px;
}
.qb-totals{
  background:var(--bg-3);padding:20px 28px;display:flex;justify-content:space-between;
  align-items:center;flex-wrap:wrap;gap:16px;border-top:1px solid var(--line);
}
.qb-totals-info{font-family:'JetBrains Mono',mono;font-size:13px;color:var(--text-2)}
.qb-totals-info b{color:var(--text);font-weight:700}
.qb-totals-amount{
  font-family:'Archivo Black',sans-serif;font-size:24px;color:var(--hot);
  letter-spacing:-.01em;
}
.qb-actions{
  padding:20px 28px;display:flex;gap:12px;flex-wrap:wrap;border-top:1px solid var(--line);
}
.qb-btn{
  padding:12px 24px;border:1px solid var(--hot);font-family:'JetBrains Mono',mono;
  font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.12em;
  cursor:pointer;transition:all .2s;
}
.qb-btn-primary{background:var(--hot);color:#000}
.qb-btn-primary:hover{background:transparent;color:var(--hot)}
.qb-btn-secondary{background:transparent;color:var(--text-2);border-color:var(--line-hi)}
.qb-btn-secondary:hover{color:var(--hot);border-color:var(--hot)}
.qb-note{
  font-family:'JetBrains Mono',mono;font-size:10px;color:var(--text-3);
  padding:14px 28px;border-top:1px solid var(--line);line-height:1.6;
}
@media(max-width:768px){
  .quote{padding:50px 16px}
  .qb-table{font-size:11px}
  /* Ẩn cột Mã SP (3) để dành chỗ cho SL & Đơn giá; giữ cột xoá (9) */
  .qb-table th:nth-child(3), .qb-table td:nth-child(3){display:none}
  /* Nới rộng cột SL (5) và Đơn giá (7) */
  .qb-table th:nth-child(5), .qb-table td:nth-child(5),
  .qb-table th:nth-child(7), .qb-table td:nth-child(7){min-width:76px}
  .qb-table .qb-input{padding:6px 5px;font-size:12px}
}
@media print{
  body > *:not(.qb-print-area){display:none !important}
}

/* === BLOCK === */

.warehouses{max-width:1400px;margin:0 auto;padding:80px 32px;border-top:1px solid var(--line)}
.wh-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.wh-card{background:var(--bg-2);border:1px solid var(--line);overflow:hidden;display:flex;flex-direction:column}
.wh-thumb{width:100%;height:200px;object-fit:cover;display:block;border-bottom:1px solid var(--line)}
@media(max-width:768px){.wh-thumb{height:160px}}
.wh-name{
  font-family:'Archivo Black',sans-serif;font-size:18px;
  padding:18px 24px;color:var(--hot);text-transform:uppercase;letter-spacing:.05em;
  border-bottom:1px solid var(--line);background:var(--bg-3);
}
.wh-addr{
  font-family:'JetBrains Mono',mono;font-size:12px;color:var(--text-2);
  padding:14px 24px;border-bottom:1px solid var(--line);line-height:1.6;letter-spacing:.02em;
}
.wh-phone{padding:10px 24px;background:var(--bg-3);border-bottom:1px solid var(--line)}
.wh-phone-line{display:flex;align-items:center;gap:12px;padding:5px 0;font-family:'JetBrains Mono',mono;font-size:13px}
.wh-phone-line .lbl{color:var(--text-2);min-width:110px;font-size:11px;letter-spacing:.02em;font-weight:600}
.wh-phone-line a{color:var(--hot);font-weight:700;text-decoration:none}
.wh-phone-line a:hover{text-decoration:underline}
.wh-phone-line .ext{color:var(--text-3);font-size:10px;letter-spacing:.05em}
.wh-map{
  width:100%;height:320px;border:0;display:block;
  filter:invert(.92) hue-rotate(180deg) brightness(.95);
}
.wh-actions{
  display:flex;gap:1px;background:var(--line);border-top:1px solid var(--line);
}
.wh-actions a{
  flex:1;padding:14px;text-align:center;background:var(--bg-2);
  font-family:'JetBrains Mono',mono;font-size:11px;color:var(--text-2);
  text-decoration:none;text-transform:uppercase;letter-spacing:.1em;
  transition:all .2s;
}
.wh-actions a:hover{background:var(--bg-3);color:var(--hot)}
@media(max-width:768px){
  .warehouses{padding:50px 16px}
  .wh-grid{grid-template-columns:1fr;gap:16px}
  .wh-map{height:260px}
  .wh-name{font-size:15px;padding:14px 18px}
  .wh-addr{padding:12px 18px}
}

/* === BLOCK === */

.mills{max-width:1400px;margin:0 auto;padding:80px 32px;border-top:1px solid var(--line)}
.mills-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);
}
.mill{
  background:var(--bg-2);padding:24px 20px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:10px;min-height:140px;
  text-align:center;transition:all .25s;cursor:default;position:relative;overflow:hidden;
}
.mill::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:3px;
  background:var(--hot);transform:scaleX(0);transform-origin:left;transition:transform .3s;
}
.mill:hover{background:var(--bg-3)}
.mill:hover::before{transform:scaleX(1)}
.mill-flag{font-size:24px;line-height:1}
.mill-logo{
  max-height:50px;max-width:160px;width:auto;height:auto;display:block;
  background:#fff;padding:8px 14px;border-radius:6px;
  transition:transform .25s, box-shadow .25s;
}
.mill:hover .mill-logo{transform:scale(1.06);box-shadow:0 0 16px rgba(255,77,28,.25)}
.mill-name{
  font-family:'Archivo Black',sans-serif;font-size:16px;
  text-transform:uppercase;letter-spacing:-.01em;line-height:1.05;
}
.mill-name .short{color:var(--hot);font-size:13px;letter-spacing:.05em}
.mill-tag{
  font-family:'JetBrains Mono',mono;font-size:10px;color:var(--text-3);
  text-transform:uppercase;letter-spacing:.12em;
}
.mills-cat{
  font-family:'JetBrains Mono',mono;font-size:11px;color:var(--hot);
  text-transform:uppercase;letter-spacing:.15em;margin:36px 0 12px;
}
.mills-cat:first-of-type{margin-top:0}
@media(max-width:768px){
  .mills{padding:50px 16px}
  .mills-grid{grid-template-columns:repeat(2,1fr)}
  .mill{padding:18px 12px;min-height:110px}
  .mill-name{font-size:13px}
}

/* === BLOCK === */

.gallery{max-width:1400px;margin:0 auto;padding:80px 32px;border-top:1px solid var(--line)}
.gallery-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:8px;
}
.gallery-item{
  position:relative;display:block;aspect-ratio:1/1;overflow:hidden;
  background:var(--bg-2);cursor:zoom-in;text-decoration:none;
}
.gallery-item img{
  width:100%;height:100%;object-fit:cover;display:block;
  transition:transform .35s ease, filter .35s ease;
}
.gallery-item:hover img{transform:scale(1.08);filter:brightness(1.1)}
.gallery-item::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg, transparent 60%, rgba(0,0,0,.7));
  opacity:0;transition:opacity .25s;
}
.gallery-item:hover::after{opacity:1}
.gallery-cap{
  position:absolute;bottom:8px;left:10px;right:10px;
  font-family:'JetBrains Mono',mono;font-size:10px;color:#fff;
  letter-spacing:.08em;text-transform:uppercase;
  opacity:0;transition:opacity .25s;z-index:2;
}
.gallery-item:hover .gallery-cap{opacity:1}
.lightbox{
  display:none;position:fixed;inset:0;z-index:1000;
  background:rgba(0,0,0,.95);
  align-items:center;justify-content:center;padding:30px;
}
.lightbox:target{display:flex}
.lightbox img{max-width:90vw;max-height:88vh;object-fit:contain}
.lightbox-close{
  position:absolute;top:20px;right:30px;
  font-family:'Archivo Black',sans-serif;font-size:36px;color:#fff;
  text-decoration:none;line-height:1;background:rgba(255,255,255,.1);
  width:48px;height:48px;display:flex;align-items:center;justify-content:center;
  border-radius:50%;transition:background .2s;
}
.lightbox-close:hover{background:var(--hot);color:#000}
@media(max-width:768px){
  .gallery{padding:50px 16px}
  .gallery-grid{grid-template-columns:repeat(2,1fr);gap:4px}
}

/* === BLOCK === */

.faq{max-width:1100px;margin:0 auto;padding:80px 32px;border-top:1px solid var(--line)}
.faq-list{display:flex;flex-direction:column;gap:1px;background:var(--line);border:1px solid var(--line)}
.faq-item{background:var(--bg-2);padding:24px 28px;cursor:pointer;transition:background .2s}
.faq-item:hover{background:var(--bg-3)}
.faq-item summary{
  list-style:none;display:flex;justify-content:space-between;align-items:flex-start;gap:20px;
  font-family:'Inter',sans-serif;font-size:16px;font-weight:600;color:var(--text);
  cursor:pointer;line-height:1.4;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-family:'JetBrains Mono',mono;font-size:24px;color:var(--hot);
  font-weight:400;flex-shrink:0;transition:transform .2s;line-height:1;
}
.faq-item[open] summary::after{content:"−"}
.faq-item-body{
  padding-top:16px;margin-top:16px;border-top:1px solid var(--line);
  font-size:14px;line-height:1.75;color:var(--text-2);
}
.faq-item-body p{margin-bottom:8px}
.faq-item-body strong{color:var(--text)}
.faq-item-body code{
  background:var(--bg-3);padding:2px 8px;border-radius:3px;
  font-family:'JetBrains Mono',mono;font-size:12px;color:var(--hot-2);
}
@media(max-width:768px){
  .faq{padding:50px 16px}
  .faq-item{padding:20px}
  .faq-item summary{font-size:14px}
}

/* === BASE FONT SIZE +25% (theo yêu cầu anh Huy) === */
html{font-size:20px}
.hero-desc{font-size:19px}
.section-desc{font-size:18px}
.pi-desc{font-size:17px}
.pi-meta-row{font-size:16px}
.pi-uses ul li{font-size:16px}
.faq-q{font-size:18px}
.faq-a{font-size:17px}
.cc-val,.cc-lbl{font-size:16px}
.cat-name{font-size:28px !important}
.nav-links{font-size:15px !important}
.pg-caption{font-size:13px}
.brand-strip{font-size:13px}
@media(max-width:768px){
  html{font-size:18px}
}

/* === HOTLINE OVERRIDE (no background, text only, no wrap) === */
.nav-hot{
  background:transparent !important;
  color:var(--hot) !important;
  border:none !important;
  padding:4px 0 !important;
  min-width:auto !important;
  align-items:flex-end !important;
  white-space:nowrap !important;
}
.nav-hot:hover{
  background:transparent !important;
  color:#ffb627 !important;
}
.nav-hot-num{color:var(--hot) !important;white-space:nowrap !important}
.nav-hot-tag{color:var(--text-3) !important;font-size:9px !important;white-space:nowrap !important}

/* === MOBILE OPTIMIZATIONS === */
.nav-mobile-btn{display:none}
.mobile-bottom-bar{display:none}
@media(max-width:768px){
  body{padding-bottom:64px}
  .nav-mobile-btn{
    display:flex !important;background:transparent;border:1px solid var(--text-2);
    color:var(--text);padding:8px 14px;font-size:22px;cursor:pointer;line-height:1;
  }
  .nav-links{
    display:none !important;position:absolute;top:100%;left:0;right:0;
    flex-direction:column;background:rgba(10,10,10,0.98);padding:16px 20px;
    border-bottom:1px solid var(--line);gap:0 !important;
  }
  .nav-links.open{display:flex !important}
  .nav-links a{padding:14px 0;font-size:16px;border-bottom:1px solid var(--line)}
  .nav-links a:last-child{border-bottom:none}
  .nav-hotlines{display:none !important}
  .mobile-bottom-bar{
    display:flex !important;position:fixed;bottom:0;left:0;right:0;z-index:99;
    background:var(--hot);border-top:2px solid #000;
  }
  .mobile-bottom-bar a{
    flex:1;padding:14px 6px;text-align:center;text-decoration:none;
    color:#000;font-family:'Archivo Black',sans-serif;font-size:13px;
    border-right:1px solid rgba(0,0,0,.25);white-space:nowrap;
  }
  .mobile-bottom-bar a:last-child{border-right:none}
  /* Padding compact */
  .cats,.prod-info,.catalog,.contact,.warehouses,.mills,.faq,.quote,.pg-section{padding:32px 14px !important}
  .hero{padding:50px 14px 40px !important}
  /* 2 col grid */
  .cat-grid{grid-template-columns:1fr 1fr !important}
  .pg-grid{grid-template-columns:1fr 1fr !important;gap:10px}
  .pi-grid{grid-template-columns:1fr !important}
  /* Touch targets ≥44px */
  .nav-links a,.cat,.pg-card,.modal-btn,.cta-btn{min-height:44px}
  /* Table catalog scroll horizontal */
  .catalog-table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
}

/* === DESKTOP WIDE (>1600px) === */
@media(min-width:1600px){
  .nav-inner,.hero,.cats,.prod-info,.catalog,.calc,.quote,
  .warehouses,.mills,.gallery,.faq,.contact-inner,.pg-section{max-width:1600px !important}
  .pg-grid{grid-template-columns:repeat(4,1fr)}
}