/* ============================================================
   MURRPLASTIK VIỆT NAM — Design System v1.0
   Domain: murrplastikvn.com | T&T Vina Industrial Co.,Ltd
   ============================================================ */

/* === FONTS === */
@import url('https://fonts.googleapis.com/css2?family=Barlow:wght@300;400;500;600;700&family=Barlow+Condensed:wght@500;600;700;800&display=swap');

/* === CSS VARIABLES === */
:root {
  --red: #C8102E;
  --red-dark: #a50d25;
  --red-glass: rgba(200,16,46,0.12);
  --dark: #1a1a1a;
  --dark-2: #111111;
  --gray: #6b6b6b;
  --gray-light: #9a9a9a;
  --light: #f5f4f0;
  --light-2: #edeae4;
  --white: #ffffff;
  --border: #e0ddd7;
  --border-dark: rgba(255,255,255,0.08);
  --font-body: 'Barlow', sans-serif;
  --font-heading: 'Barlow Condensed', sans-serif;
  --nav-h: 64px;
  --t: 0.22s ease;
  --t-slow: 0.38s cubic-bezier(0.4,0,0.2,1);
}

/* === RESET === */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;scroll-padding-top:calc(var(--nav-h) + 30px)}
section{scroll-margin-top:calc(var(--nav-h) + 30px)}
body{font-family:var(--font-body);background:var(--light);color:var(--dark);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font-family:var(--font-body);cursor:pointer;border:none;outline:none}
ul{list-style:none}

/* === UTILITIES === */
.container{max-width:1240px;margin:0 auto;padding:0 3rem}
.section-pad{padding:5rem 3rem}
.section-tag{display:inline-block;background:var(--red);color:#fff;font-size:10px;font-weight:700;letter-spacing:2px;text-transform:uppercase;padding:4px 12px;margin-bottom:12px}
.section-title{font-family:var(--font-heading);font-size:42px;font-weight:700;line-height:1.2;letter-spacing:-0.5px;margin-bottom:10px}
.section-sub{color:var(--gray);font-size:15px;line-height:1.7;max-width:520px}
.text-red{color:var(--red)}

/* === NAVBAR === */
#navbar{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-h);background:var(--dark);border-bottom:1px solid rgba(255,255,255,0.05);transition:box-shadow var(--t)}
#navbar.scrolled{box-shadow:0 4px 24px rgba(0,0,0,0.35)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:100%;padding:0 3rem}

/* Logo */
.nav-logo{display:flex;align-items:center;gap:14px;flex-shrink:0}
.nav-logo-main{font-family:var(--font-heading);font-size:22px;font-weight:800;color:#fff;letter-spacing:1px;line-height:1}
.nav-logo-main span{color:var(--red)}
.nav-logo-sep{width:1px;height:30px;background:rgba(255,255,255,0.15)}
.nav-logo-sub{display:flex;flex-direction:column;gap:1px}
.nav-logo-sub b{color:rgba(255,255,255,0.85);font-size:10px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase}
.nav-logo-sub small{color:rgba(255,255,255,0.38);font-size:9px;letter-spacing:1px;text-transform:uppercase}

/* Nav links */
.nav-links{display:flex;align-items:center;gap:2rem}
.nav-links a{color:rgba(255,255,255,0.6);font-size:12px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;transition:color var(--t);position:relative;padding-bottom:2px}
.nav-links a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--red);transition:width var(--t)}
.nav-links a:hover, .nav-links a.active{color:#fff}
.nav-links a:hover::after, .nav-links a.active::after{width:100%}

/* === PRELOADER === */
#preloader {
  position: fixed;
  inset: 0;
  background: var(--dark);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s;
}
#preloader.fade-out {
  opacity: 0;
  visibility: hidden;
}
.loader-content {
  text-align: center;
}
.loader-logo {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 2px;
  margin-bottom: 20px;
}
.loader-logo span { color: var(--red); }
.loader-bar {
  width: 140px;
  height: 2px;
  background: rgba(255,255,255,0.1);
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}
.loader-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--red);
  animation: loading 1.5s infinite;
}
@keyframes loading {
  0% { left: -100%; }
  50% { left: 0; }
  100% { left: 100%; }
}

/* === SUCCESS POPUP === */
.popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(4px);
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.popup-overlay.open {
  opacity: 1;
  visibility: visible;
}
.popup-content {
  background: var(--white);
  padding: 3rem 2rem;
  width: 90%;
  max-width: 400px;
  text-align: center;
  transform: translateY(40px) scale(0.9);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.popup-overlay.open .popup-content {
  transform: translateY(0) scale(1);
}
.popup-icon {
  width: 80px;
  height: 80px;
  background: #2ecc71;
  color: #fff;
  font-size: 42px;
  line-height: 80px;
  border-radius: 50%;
  margin: 0 auto 1.5rem;
  box-shadow: 0 10px 25px rgba(46, 204, 113, 0.3);
}
.popup-content h3 {
  font-family: var(--font-heading);
  font-size: 28px;
  margin-bottom: 0.5rem;
  color: var(--dark);
}
.popup-content p {
  color: var(--gray);
  font-size: 15px;
  margin-bottom: 2rem;
  line-height: 1.6;
}
.popup-content .btn-primary {
  width: 100%;
}

/* Nav right */
.nav-right{display:flex;align-items:center;gap:12px}

/* Language toggle */
.lang-btn{display:flex;align-items:center;background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.1);border-radius:4px;overflow:hidden}
.lang-btn button{background:transparent;color:rgba(255,255,255,0.5);font-size:11px;font-weight:700;letter-spacing:1px;padding:6px 10px;transition:all var(--t)}
.lang-btn button.active{background:var(--red);color:#fff}
.lang-btn button:hover:not(.active){color:#fff}

/* CTA button */
.btn-cta{background:var(--red);color:#fff;padding:10px 20px;font-size:12px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;transition:background var(--t)}
.btn-cta:hover{background:var(--red-dark)}

/* Hamburger */
.hamburger{display:none;flex-direction:column;gap:5px;background:transparent;padding:4px}
.hamburger span{width:22px;height:2px;background:rgba(255,255,255,0.7);transition:all var(--t);display:block}

/* Mobile menu */
.mobile-menu{display:none;position:fixed;top:var(--nav-h);left:0;right:0;bottom:0;background:var(--dark-2);z-index:999;padding:2rem;flex-direction:column;gap:1rem;overflow-y:auto}
.mobile-menu.open{display:flex}
.mobile-menu a{color:rgba(255,255,255,0.7);font-size:16px;font-weight:600;letter-spacing:1px;text-transform:uppercase;padding:14px 0;border-bottom:1px solid rgba(255,255,255,0.06);transition:color var(--t)}
.mobile-menu a:hover{color:#fff}
.mobile-menu .btn-cta{margin-top:1rem;text-align:center;display:block;padding:14px}

/* === HERO === */
#hero{padding-top:var(--nav-h);background:var(--dark);min-height:100vh;display:grid;grid-template-columns:1fr 1fr;align-items:center}
.hero-left{padding:5rem 3rem 5rem 4rem}
.hero-tag-row{display:flex;align-items:center;gap:10px;margin-bottom:1.5rem}
.hero-tag-chip{background:var(--red);color:#fff;font-size:9px;font-weight:700;letter-spacing:2px;text-transform:uppercase;padding:4px 10px}
.hero-tag-text{color:rgba(255,255,255,0.38);font-size:10px;letter-spacing:1.5px;text-transform:uppercase}
.hero-h1{font-family:var(--font-heading);font-size:68px;font-weight:800;color:#fff;line-height:1.1;letter-spacing:-2px;margin-bottom:1.5rem}
.hero-h1 em{color:var(--red);font-style:normal}
.hero-desc{color:rgba(255,255,255,0.55);font-size:15px;line-height:1.75;max-width:400px;margin-bottom:2rem}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn-primary{background:var(--red);color:#fff;padding:14px 28px;font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;transition:background var(--t)}
.btn-primary:hover{background:var(--red-dark)}
.btn-outline{background:transparent;color:#fff;border:1px solid rgba(255,255,255,0.25);padding:14px 28px;font-size:12px;font-weight:600;letter-spacing:2px;text-transform:uppercase;transition:border-color var(--t)}
.btn-outline:hover{border-color:rgba(255,255,255,0.6)}

/* Hero right */
.hero-right{position:relative;height:100%;min-height:520px;display:flex;align-items:center;justify-content:center}
.hero-grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(200,16,46,0.07) 1px,transparent 1px),linear-gradient(90deg,rgba(200,16,46,0.07) 1px,transparent 1px);background-size:44px 44px}
.hero-cards{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:3rem;width:100%}
.hcard{background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.07);padding:1.5rem;position:relative;overflow:hidden;transition:background var(--t)}
.hcard:hover{background:rgba(255,255,255,0.07)}
.hcard::before{content:'';position:absolute;top:0;left:0;width:3px;height:100%;background:var(--red)}
.hcard-code{font-size:9px;font-weight:700;color:var(--red);letter-spacing:2px;text-transform:uppercase;margin-bottom:6px}
.hcard-name{color:rgba(255,255,255,0.88);font-size:13px;font-weight:600;letter-spacing:0.5px;margin-bottom:4px}
.hcard-desc{color:rgba(255,255,255,0.38);font-size:11px;line-height:1.5}

/* === STATS BAR === */
#stats{background:#111;border-top:1px solid rgba(255,255,255,0.06)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat-item{padding:2rem 2.5rem;border-right:1px solid rgba(255,255,255,0.06)}
.stat-item:last-child{border-right:none}
.stat-num{font-family:var(--font-heading);font-size:42px;font-weight:800;color:#fff;line-height:1.2}
.stat-num em{color:var(--red);font-style:normal}
.stat-label{color:rgba(255,255,255,0.38);font-size:10px;letter-spacing:1.5px;text-transform:uppercase;margin-top:4px}

/* === PRODUCTS === */
#products{background:var(--light);padding:5rem 3rem}
.products-header{margin-bottom:3rem}
.products-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border)}
.prod-item{background:var(--white);padding:2.5rem;position:relative;overflow:hidden;transition:background var(--t);cursor:pointer}
.prod-item:hover{background:#fafaf8}
.prod-item:hover .prod-arrow{color:var(--red)}
.prod-item:hover .prod-icon-wrap{background:var(--red-glass)}
.prod-num{font-family:var(--font-heading);font-size:52px;font-weight:800;color:rgba(200,16,46,0.07);position:absolute;top:1rem;right:1.5rem;line-height:1.2}
.prod-icon-wrap{width:52px;height:52px;background:var(--light);display:flex;align-items:center;justify-content:center;margin-bottom:1.2rem;position:relative;z-index:1;transition:background var(--t)}
.prod-icon-wrap svg{width:26px;height:26px;color:var(--red)}
.prod-code{font-size:9px;font-weight:700;color:var(--red);letter-spacing:2px;text-transform:uppercase;margin-bottom:6px;position:relative;z-index:1}
.prod-name{font-size:16px;font-weight:700;margin-bottom:8px;position:relative;z-index:1}
.prod-desc{color:var(--gray);font-size:13px;line-height:1.65;position:relative;z-index:1}
.prod-arrow{position:absolute;bottom:1.5rem;right:1.5rem;font-size:20px;color:var(--border);transition:color var(--t)}
.prod-all{background:var(--red)!important;cursor:pointer}
.prod-all-inner{height:100%;display:flex;flex-direction:column;justify-content:center}
.prod-all-label{color:rgba(255,255,255,0.55);font-size:9px;font-weight:700;letter-spacing:2px;text-transform:uppercase;margin-bottom:8px}
.prod-all-title{color:#fff;font-family:var(--font-heading);font-size:26px;font-weight:700;line-height:1.2;margin-bottom:12px}
.prod-all-sub{color:rgba(255,255,255,0.55);font-size:13px}

/* === WHY SECTION === */
#why{background:var(--dark);padding:5rem 3rem}
#why .section-title{color:#fff}
#why .section-sub{color:rgba(255,255,255,0.45)}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(255,255,255,0.06);margin-top:3rem}
.why-item{background:var(--dark);padding:2.2rem;transition:background var(--t)}
.why-item:hover{background:#202020}
.why-num{font-family:var(--font-heading);font-size:14px;font-weight:700;color:var(--red);letter-spacing:1.5px;text-transform:uppercase;margin-bottom:0.8rem}
.why-title{color:#fff;font-size:16px;font-weight:600;margin-bottom:8px}
.why-desc{color:rgba(255,255,255,0.42);font-size:13px;line-height:1.65}

/* === INDUSTRIES === */
#industries{background:var(--white);padding:5rem 3rem}
.ind-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;margin-top:3rem}
.ind-item{background:var(--light);padding:1.5rem 1rem;text-align:center;transition:all var(--t)}
/* Remove hover effects to avoid confusion with clickable items */
/* .ind-item:hover{background:var(--red);transform:translateY(-4px)}
.ind-item:hover .ind-name{color:#fff}
.ind-item:hover .ind-icon{color:#fff;opacity:1} */
.ind-icon{font-size:28px;margin-bottom:10px;opacity:0.7;transition:all var(--t)}
.ind-name{font-size:12px;font-weight:700;letter-spacing:0.5px;color:var(--dark);transition:color var(--t)}

/* === CERTIFICATE === */
#certificate{background:var(--light);padding:5rem 3rem}
.cert-inner{display:grid;grid-template-columns:1fr 1fr;gap:5rem;align-items:center}
.cert-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:1.5rem;margin-bottom:1.5rem}
.cert-badge{background:var(--white);border:1px solid var(--border);padding:6px 14px;font-size:11px;font-weight:700;letter-spacing:1px;color:var(--gray)}
.cert-highlight{background:var(--dark);color:#fff;padding:1.5rem;margin-top:1.5rem;border-left:4px solid var(--red)}
.cert-highlight p{font-size:13px;line-height:1.7;color:rgba(255,255,255,0.7)}
.cert-highlight strong{color:#fff;font-size:14px;display:block;margin-bottom:6px}
.cert-image-wrap{position:relative}
.cert-image-wrap img{width:100%;border:1px solid var(--border);box-shadow:0 20px 60px rgba(0,0,0,0.12)}
.cert-stamp{position:absolute;bottom:-16px;right:-16px;background:var(--red);color:#fff;padding:12px 20px;text-align:center}
.cert-stamp b{font-family:var(--font-heading);font-size:18px;font-weight:700;display:block;line-height:1}
.cert-stamp small{font-size:9px;letter-spacing:1.5px;text-transform:uppercase;opacity:0.75}

/* === CONTACT === */
#contact{background:var(--white);padding:5rem 3rem}
.contact-inner{display:grid;grid-template-columns:1fr 1fr;gap:5rem;align-items:start}
.contact-info-title{font-family:var(--font-heading);font-size:40px;font-weight:700;line-height:1.2;margin-bottom:1.5rem}
.contact-info-title em{color:var(--red);font-style:normal}
.contact-items{display:flex;flex-direction:column;gap:10px;margin-top:1.5rem}
.contact-item{display:flex;align-items:flex-start;gap:14px;padding:1rem 1.2rem;background:var(--light)}
.contact-item svg{width:20px;height:20px;flex-shrink:0;margin-top:2px;color:var(--red)}
.contact-item-label{font-size:9px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--red);margin-bottom:3px}
.contact-item-val{font-size:14px;color:var(--dark);font-weight:500}
.contact-item-val.hotline{font-size:18px;font-weight:700;color:var(--red)}

/* Form */
.form-title{font-size:16px;font-weight:700;margin-bottom:16px}
.quote-form{display:flex;flex-direction:column;gap:12px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-group{display:flex;flex-direction:column;gap:5px;position:relative;margin-bottom:0.5rem}
.field-error{color:var(--red);font-size:11px;font-weight:600;margin-top:2px;min-height:14px;transition:all 0.3s}
input.invalid, textarea.invalid{border-color:var(--red) !important;background:rgba(200,16,46,0.02)}
.form-group label{font-size:10px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:var(--gray)}
.form-group input:not([type="checkbox"]),.form-group select,.form-group textarea{border:1px solid var(--border);padding:11px 13px;font-family:var(--font-body);font-size:14px;background:var(--white);color:var(--dark);outline:none;transition:border-color var(--t);-webkit-appearance:none}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--red)}
.form-group textarea{height:95px;resize:none}
.btn-submit{background:var(--red);color:#fff;padding:14px;font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;transition:background var(--t);width:100%}
.btn-submit:hover{background:var(--red-dark)}
.btn-submit:disabled{opacity:0.6;cursor:not-allowed}
.form-msg{text-align:center;padding:12px;font-size:13px;font-weight:600;display:none}
.form-msg.success{background:rgba(46,204,113,0.1);color:#2ecc71;border:1px solid rgba(46,204,113,0.2)}
.form-msg.error{background:rgba(231,76,60,0.1);color:#e74c3c;border:1px solid rgba(231,76,60,0.2)}

/* New Form Styles */
.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 10px;
  background: rgba(255,255,255,0.03);
  padding: 15px;
  border-radius: 8px;
  border: 1px solid var(--border-dark);
}
.check-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  cursor: pointer;
  transition: var(--t);
  color: var(--gray-light);
}
.check-item:hover { color: var(--red); }
.check-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--red);
  cursor: pointer;
}
.file-upload-wrapper {
  margin-top: 8px;
}
#f-file {
  width: 100%;
  padding: 10px;
  background: rgba(255,255,255,0.05);
  border: 1px dashed var(--border-dark);
  border-radius: 8px;
  color: var(--gray-light);
  cursor: pointer;
  transition: var(--t);
}
#f-file:hover { background: rgba(255,255,255,0.08); border-color: var(--red); }
.file-hint {
  font-size: 12px;
  color: var(--gray);
  margin-top: 6px;
  font-style: italic;
  transition: color var(--t);
}
.file-hint.file-success {
  color: #2ecc71;
  font-weight: 600;
  font-style: normal;
}

/* === FOOTER === */
footer{background:var(--dark-2);border-top:1px solid rgba(255,255,255,0.06)}
.footer-top{padding:3rem;display:grid;grid-template-columns:2fr 1fr 1fr;gap:4rem}
.footer-brand{font-family:var(--font-heading);font-size:20px;font-weight:800;color:#fff;letter-spacing:1px;margin-bottom:6px}
.footer-brand span{color:var(--red)}
.footer-tagline{color:rgba(255,255,255,0.35);font-size:12px;letter-spacing:1px;margin-bottom:1.2rem}
.footer-contact-line{display:flex;align-items:center;gap:8px;color:rgba(255,255,255,0.55);font-size:13px;margin-bottom:6px}
.footer-contact-line svg{width:14px;height:14px;color:var(--red);flex-shrink:0}
.footer-col-title{color:#fff;font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-links a{color:rgba(255,255,255,0.45);font-size:13px;transition:color var(--t)}
.footer-links a:hover{color:rgba(255,255,255,0.85)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.06);padding:1.2rem 3rem;display:flex;align-items:center;justify-content:space-between}
.footer-bottom-left{color:rgba(255,255,255,0.35);font-size:12px}
.footer-bottom-right{color:rgba(255,255,255,0.25);font-size:12px}

/* === SCROLL ANIMATIONS === */
.reveal{opacity:0;transform:translateY(24px);transition:opacity 0.6s ease,transform 0.6s ease}
.reveal.visible{opacity:1;transform:none}

.prod-bg-img {
  position: absolute;
  bottom: -15px;
  right: -15px;
  width: 140px;
  height: 140px;
  object-fit: contain;
  opacity: 0.08;
  filter: grayscale(100%);
  pointer-events: none;
  z-index: 0;
  transition: transform var(--t), opacity var(--t);
}
.prod-item:hover .prod-bg-img {
  transform: scale(1.1) rotate(-5deg);
  opacity: 0.12;
}

/* === PRODUCT GALLERY === */
.product-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin: 3rem 0;
}
.gallery-item {
  background: #fff;
  border: 1px solid var(--border);
  padding: 15px;
  transition: transform var(--t);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
}
.gallery-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}
.gallery-item img {
  width: 100%;
  max-height: 180px;
  object-fit: contain;
  margin-bottom: 15px;
}
.gallery-item span {
  display: block;
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  color: var(--dark);
}

/* === MOBILE RESPONSIVE === */

@media(max-width:1024px){
  .nav-links{display:none}
  .btn-cta{display:none}
  .hamburger{display:flex}
  #hero{grid-template-columns:1fr}
  .hero-right{display:none}
  .hero-left{padding:3rem 2rem;text-align:center;max-width:600px;margin:0 auto}
  .hero-actions{justify-content:center}
  .hero-h1{font-size:52px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .products-grid{grid-template-columns:repeat(2,1fr)}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .ind-grid{grid-template-columns:repeat(3,1fr)}
  .cert-inner{grid-template-columns:1fr}
  .contact-inner{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr}
  .section-pad,.products-header,.products-grid{padding-left:2rem;padding-right:2rem}
  .nav-inner,.footer-top,.footer-bottom{padding-left:1.5rem;padding-right:1.5rem}
  #products,#why,#industries,#certificate,#contact{padding:4rem 2rem}
}

@media(max-width:640px){
  .hero-h1{font-size:42px}
  .section-title{font-size:34px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat-item{padding:1.5rem}
  .products-grid{grid-template-columns:1fr}
  .why-grid{grid-template-columns:1fr}
  .ind-grid{grid-template-columns:repeat(2,1fr)}
  .form-row{grid-template-columns:1fr}
  .cert-inner,.contact-inner{gap:2.5rem}
  .footer-top{grid-template-columns:1fr;gap:2rem}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
  #products,#why,#industries,#certificate,#contact{padding:3rem 1.25rem}
  .hero-left{padding:2.5rem 1.25rem}
  .nav-inner{padding:0 1.25rem}
  .stat-num{font-size:32px}
}

/* === FLOATING CONTACT BUTTONS === */
.floating-contact {
  position: fixed;
  bottom: 30px;
  right: 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 9999;
}
.float-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  transition: transform 0.3s, filter 0.3s;
  overflow: hidden;
  animation: pulse-blue 2s infinite;
}
.float-btn:hover {
  transform: scale(1.1) translateY(-3px);
}
.float-btn.zalo {
  background: #0084FF;
}
.float-btn.zalo img {
  width: 100%;
  height: 100%;
}
.float-btn.messenger {
  background: #0084FF;
  color: #fff;
}
.float-btn.messenger svg {
  width: 28px;
  height: 28px;
}
.float-btn.phone {
  background: #2196F3; /* Bright blue for call */
  color: #fff;
}
.float-btn.phone svg {
  width: 24px;
  height: 24px;
}

@keyframes pulse-blue {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(0, 132, 255, 0.7); }
  70% { transform: scale(1.05); box-shadow: 0 0 0 15px rgba(0, 132, 255, 0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(0, 132, 255, 0); }
}

@media(max-width: 640px) {
  .floating-contact {
    bottom: 20px;
    right: 20px;
    gap: 10px;
  }
  .float-btn {
    width: 46px;
    height: 46px;
  }
}