:root{
  --bg:#05070A;
  --bg2:#0A0F14;
  --card:rgba(255,255,255,.06);
  --line:rgba(255,255,255,.1);
  --text:#fff;
  --muted:#B8C0CC;
  --blue:#1E5BFF;
  --orange:#FF6A00;
  --shadow:0 20px 50px rgba(0,0,0,.35);
  --radius:20px;
  --container:min(1180px, 92vw);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);
  background:radial-gradient(circle at top left, rgba(30,91,255,.18), transparent 30%),
  radial-gradient(circle at bottom right, rgba(255,106,0,.12), transparent 28%),
  linear-gradient(135deg,var(--bg),var(--bg2));
  line-height:1.6;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:var(--container);margin:auto}
.topbar{background:rgba(255,255,255,.03);border-bottom:1px solid var(--line);font-size:.92rem}
.topbar .inner{display:flex;gap:18px;justify-content:space-between;align-items:center;padding:10px 0;color:var(--muted);flex-wrap:wrap}
.topbar .actions{display:flex;gap:10px;flex-wrap:wrap}
.pill{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;background:rgba(255,255,255,.05);border:1px solid var(--line);transition:.3s transform,.3s background,.3s border-color}
.pill:hover{transform:translateY(-2px);border-color:rgba(255,255,255,.22)}
header.nav-wrap{position:sticky;top:0;z-index:50;backdrop-filter:saturate(180%) blur(12px);background:rgba(5,7,10,.55);border-bottom:1px solid transparent;transition:.3s}
header.nav-wrap.scrolled{border-color:var(--line);background:rgba(5,7,10,.82)}
.nav{display:flex;justify-content:space-between;align-items:center;padding:14px 0}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.6px}
.brand img{width:42px;height:42px;border-radius:12px}
.brand small{display:block;color:var(--muted);font-size:.8rem;font-weight:600}
.menu{display:flex;gap:22px;align-items:center}
.menu a{position:relative;color:#dbe3ee}
.menu a::after{content:'';position:absolute;left:0;bottom:-7px;width:0;height:2px;background:linear-gradient(90deg,var(--blue),var(--orange));transition:.3s}
.menu a:hover::after,.menu a.active::after{width:100%}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:1.7rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 22px;border-radius:14px;border:1px solid var(--line);font-weight:700;transition:transform .3s, box-shadow .3s, background .3s, border-color .3s;cursor:pointer}
.btn:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.btn-primary{background:linear-gradient(135deg,var(--blue),#497eff);border-color:rgba(255,255,255,.15)}
.btn-accent{background:linear-gradient(135deg,var(--orange),#ff8b3d);color:#111;border:none}
.btn-ghost{background:rgba(255,255,255,.04)}
.hero{position:relative;padding:90px 0 60px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}
.kicker{display:inline-flex;padding:9px 14px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.05);color:#dce6f3;font-size:.92rem}
.hero h1{font-size:clamp(2.2rem,4.7vw,4.5rem);line-height:1.06;margin:18px 0 16px}
.hero p{font-size:1.07rem;color:var(--muted);max-width:62ch}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px}
.hero-media{position:relative;perspective:1200px}
.hero-card{background:linear-gradient(180deg, rgba(255,255,255,.12), rgba(255,255,255,.04));border:1px solid rgba(255,255,255,.14);padding:16px;border-radius:24px;box-shadow:var(--shadow);transform-style:preserve-3d;transform:rotateY(-12deg) rotateX(6deg);transition:transform .5s ease}
.hero-card:hover{transform:rotateY(-6deg) rotateX(2deg) translateY(-6px)}
.hero-card img{border-radius:16px;aspect-ratio:4/3;object-fit:cover}
.floating-orb,.floating-orb2{position:absolute;border-radius:50%;filter:blur(30px);opacity:.55;pointer-events:none}
.floating-orb{width:220px;height:220px;background:rgba(30,91,255,.3);top:-40px;right:-40px;animation:float 8s ease-in-out infinite}
.floating-orb2{width:170px;height:170px;background:rgba(255,106,0,.22);bottom:10px;left:-20px;animation:float 9s ease-in-out infinite reverse}
@keyframes float{50%{transform:translateY(-15px) translateX(12px)}}
.section{padding:72px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:28px;flex-wrap:wrap}
.section h2{font-size:clamp(1.7rem,3vw,2.7rem);margin:0 0 8px}
.section p.lead,.muted{color:var(--muted)}
.grid-4,.grid-3,.grid-2{display:grid;gap:22px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{position:relative;background:var(--card);backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .35s, border-color .35s, background .35s}
.card:hover{transform:translateY(-8px) rotateX(2deg);border-color:rgba(255,255,255,.2);background:rgba(255,255,255,.08)}
.card .icon{width:58px;height:58px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(30,91,255,.2),rgba(255,106,0,.12));border:1px solid var(--line);margin-bottom:14px}
.stats .card{text-align:center}
.stats strong{display:block;font-size:2rem;margin-bottom:4px}
.category-card img,.project-card img,.product-card img{border-radius:16px;aspect-ratio:16/11;object-fit:cover;margin-bottom:14px}
.category-card .meta,.project-card .meta,.product-card .meta{color:var(--muted);font-size:.94rem}
.specs{display:flex;flex-wrap:wrap;gap:10px;margin:12px 0 16px}
.specs span{padding:8px 10px;background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:999px;font-size:.86rem;color:#e7edf6}
.list-clean{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.list-clean li{padding-left:18px;position:relative;color:#dfe6ef}
.list-clean li::before{content:'•';position:absolute;left:0;color:var(--orange)}
.cta-band{background:linear-gradient(135deg,rgba(30,91,255,.15),rgba(255,106,0,.12));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.testimonial{min-height:220px}
.faq-item{overflow:hidden}
.faq-item button{width:100%;text-align:left;background:none;border:none;color:#fff;font:inherit;padding:0;display:flex;justify-content:space-between;gap:20px;cursor:pointer}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;margin-top:0;color:var(--muted)}
.faq-item.active .faq-answer{max-height:200px;margin-top:12px}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
input,select,textarea{width:100%;padding:14px 16px;border-radius:14px;background:rgba(255,255,255,.05);border:1px solid var(--line);color:#fff;font:inherit}
textarea{min-height:140px;resize:vertical}
label{display:block;margin-bottom:8px;font-weight:600}
.footer{padding:60px 0 30px;border-top:1px solid var(--line);background:rgba(255,255,255,.02)}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:22px}
.footer small,.footer p,.footer a{color:var(--muted)}
.page-hero{padding:70px 0 34px}
.page-hero h1{margin:12px 0 10px;font-size:clamp(2rem,4.2vw,3.6rem)}
.filters{display:flex;gap:12px;flex-wrap:wrap;margin:16px 0 24px}
.search-row{display:flex;gap:14px;flex-wrap:wrap;margin:14px 0 24px}
.search-row input{max-width:340px}
.results-count{color:var(--muted);margin-bottom:14px}
.product-detail-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:28px}
.spec-table{width:100%;border-collapse:collapse;margin:18px 0}
.spec-table th,.spec-table td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
.badge{display:inline-flex;padding:8px 12px;border-radius:999px;background:rgba(30,91,255,.16);border:1px solid rgba(30,91,255,.3);font-weight:700;font-size:.88rem}
.reveal{opacity:0;transform:translateY(24px);transition:.7s ease}
.reveal.in{opacity:1;transform:none}
.fab-whatsapp,.fab-top,.fab-call{position:fixed;right:18px;border-radius:999px;z-index:60;box-shadow:var(--shadow)}
.fab-whatsapp{bottom:20px;background:#1FAF38;color:#fff;padding:14px 16px;font-weight:800}
.fab-top{bottom:84px;background:rgba(255,255,255,.1);border:1px solid var(--line);color:#fff;padding:13px 16px;display:none}
.fab-call{bottom:148px;background:linear-gradient(135deg,var(--orange),#ff8b3d);color:#111;padding:13px 16px;font-weight:800;display:none}
.mobile-cta{display:none}
.progress{position:fixed;top:0;left:0;height:3px;background:linear-gradient(90deg,var(--blue),var(--orange));width:0;z-index:70}
.empty-state{padding:34px;text-align:center;color:var(--muted)}
@media (max-width: 980px){
  .hero-grid,.grid-4,.grid-3,.grid-2,.footer-grid,.product-detail-grid{grid-template-columns:1fr 1fr}
}
@media (max-width: 760px){
  .menu{display:none;position:absolute;left:4vw;right:4vw;top:72px;background:rgba(8,10,14,.98);border:1px solid var(--line);padding:16px;border-radius:18px;flex-direction:column;align-items:flex-start}
  .menu.open{display:flex}
  .nav-toggle{display:block}
  .hero-grid,.grid-4,.grid-3,.grid-2,.footer-grid,.product-detail-grid,.form-grid{grid-template-columns:1fr}
  .topbar .inner{justify-content:center}
  .hero{padding-top:60px}
  .fab-call,.fab-top{display:block}
  .mobile-cta{display:flex;position:fixed;left:0;right:0;bottom:0;background:rgba(5,7,10,.95);backdrop-filter:blur(12px);padding:10px;gap:10px;border-top:1px solid var(--line);z-index:55}
  .mobile-cta .btn{flex:1;padding:12px 10px;font-size:.95rem}
  body.has-mobile-cta{padding-bottom:76px}
}


/* bilingual enhancements */
html[lang="en-BD"]{font-size:16px}
.bn{display:block;color:var(--muted);font-size:.95em;line-height:1.55;margin-top:4px}
.en-bn{display:grid;gap:4px}
.en-bn .en{display:block}
.en-bn .bn{display:block}
.kicker .bn{display:inline;color:#dce6f3;opacity:.9}
.brand small .bn{display:inline;color:var(--muted)}
.dual-inline{display:inline-flex;gap:8px;flex-wrap:wrap;align-items:center}
.dual-inline .divider{opacity:.45}
.lead .bn{font-size:.98em}
label .bn{font-weight:500}
option{color:#111}