:root{
  --navy:#0B2545;
  --navy-deep:#071A33;
  --navy-soft:#13315C;
  --gold:#E8A82B;
  --gold-deep:#C98A0E;
  --paper:#F7F5F0;
  --ink:#1C2733;
  --ink-soft:#4A5A6A;
  --line:#DFD9CC;
  --green:#25D366;
  --white:#FFFFFF;
  --radius:14px;
  --shadow:0 10px 30px rgba(11,37,69,.12);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:'Hind Siliguri',sans-serif;color:var(--ink);background:var(--paper);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{width:min(1140px,92%);margin:0 auto}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:4px}

html[data-lang="en"] .i18n-heading{font-family:'Fraunces',serif}
html[data-lang="bn"] .i18n-heading{font-family:'Noto Serif Bengali',serif}

/* ---------- Top bar ---------- */
.topbar{background:var(--navy-deep);color:#C9D6E5;font-size:.8rem;padding:.45rem 0}
.topbar .container{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.topbar a{color:var(--gold)}
.topbar span{white-space:nowrap}
.topbar .tb-phones{display:inline-flex;gap:.9rem;flex-wrap:wrap}

/* ---------- Header ---------- */
header{position:sticky;top:0;z-index:200;background:var(--white);border-bottom:1px solid var(--line);box-shadow:0 2px 12px rgba(11,37,69,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:.7rem 0;gap:1rem}
.brand{display:flex;align-items:center;gap:.65rem}
.brand-logo-img{height:58px;width:auto;object-fit:contain;flex-shrink:0}
.nav-links{display:flex;gap:1.5rem;list-style:none;font-weight:500;font-size:.95rem}
.nav-links a{color:var(--ink);transition:color .2s;position:relative}
.nav-links a:hover{color:var(--gold-deep)}
.nav-links a.active{color:var(--gold-deep)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;background:var(--gold-deep)}
.nav-right{display:flex;align-items:center;gap:.8rem}
.lang-switch{position:relative;display:inline-flex}
.lang-switch select{appearance:none;-webkit-appearance:none;background:var(--paper) url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M6 9l6 6 6-6" stroke="%234A5A6A" stroke-width="2" fill="none" stroke-linecap="round" stroke-linejoin="round"/></svg>') no-repeat right .6rem center/14px;border:1.5px solid var(--line);border-radius:999px;padding:.5rem 2.1rem .5rem 1rem;font-family:inherit;font-weight:600;font-size:.85rem;color:var(--navy);cursor:pointer;transition:border-color .2s}
.lang-switch select:hover,.lang-switch select:focus{border-color:var(--gold)}
.nav-cta{background:var(--navy);color:#fff;padding:.55rem 1.15rem;border-radius:999px;font-weight:600;font-size:.9rem;display:inline-flex;align-items:center;gap:.45rem;transition:background .2s}
.nav-cta:hover{background:var(--navy-soft)}
.hamburger{display:none;background:none;border:none;cursor:pointer;padding:.4rem}
.hamburger span{display:block;width:24px;height:2.5px;background:var(--navy);margin:5px 0;border-radius:2px;transition:.3s}

/* ---------- Hero (home) ---------- */
.hero{background:linear-gradient(160deg,var(--navy-deep) 0%,var(--navy) 55%,var(--navy-soft) 100%);color:#fff;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(232,168,43,.22),transparent 65%)}
.hero .container{display:grid;grid-template-columns:1.15fr .85fr;gap:3rem;align-items:center;padding:4.5rem 0 5rem;position:relative;z-index:1}
.hero-eyebrow{display:inline-flex;align-items:center;gap:.5rem;background:rgba(232,168,43,.14);border:1px solid rgba(232,168,43,.4);color:var(--gold);padding:.35rem .9rem;border-radius:999px;font-size:.8rem;letter-spacing:.06em;font-weight:600;margin-bottom:1.2rem}
.hero h1{font-weight:800;font-size:clamp(2rem,4.6vw,3.3rem);line-height:1.25;margin-bottom:.9rem}
.hero h1 .accent{color:var(--gold)}
.hero p.lead{color:#C9D6E5;max-width:46ch;margin-bottom:1.8rem}
.hero-actions{display:flex;gap:.9rem;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:.55rem;padding:.85rem 1.6rem;border-radius:999px;font-weight:600;font-size:1rem;border:none;cursor:pointer;transition:transform .15s,box-shadow .2s,background .2s}
.btn:hover{transform:translateY(-2px)}
.btn-gold{background:var(--gold);color:var(--navy-deep);box-shadow:0 6px 18px rgba(232,168,43,.35)}
.btn-gold:hover{background:#F2B94A}
.btn-outline{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.45)}
.btn-outline:hover{border-color:var(--gold);color:var(--gold)}
.btn-whatsapp{background:var(--green);color:#fff;box-shadow:0 6px 18px rgba(37,211,102,.3)}
.btn svg{width:18px;height:18px;flex-shrink:0}
.hero-trust{display:flex;gap:2rem;margin-top:2.4rem;flex-wrap:wrap}
.trust-item strong{display:block;font-family:'Fraunces',serif;font-size:1.5rem;color:var(--gold)}
.trust-item span{font-size:.85rem;color:#9FB2C8}

.hero-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);backdrop-filter:blur(6px);border-radius:20px;padding:1.8rem;box-shadow:var(--shadow)}
.hero-card h3{font-size:1.15rem;margin-bottom:.35rem;color:#fff}
.hero-card p{font-size:.88rem;color:#B7C6D9;margin-bottom:1.1rem}
.hero-card ul{list-style:none;display:grid;gap:.7rem}
.hero-card li{display:flex;gap:.6rem;align-items:flex-start;font-size:.92rem;color:#E3EAF3}
.hero-card li svg{width:18px;height:18px;flex-shrink:0;margin-top:3px}

/* ---------- Page hero (inner pages: services / contact) ---------- */
.page-hero{background:linear-gradient(160deg,var(--navy-deep) 0%,var(--navy) 55%,var(--navy-soft) 100%);color:#fff;position:relative;overflow:hidden;padding:3.2rem 0}
.page-hero::after{content:"";position:absolute;right:-100px;top:-100px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(232,168,43,.2),transparent 65%)}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{font-size:.85rem;color:#9FB2C8;margin-bottom:.9rem}
.breadcrumb a{color:#C9D6E5}
.breadcrumb a:hover{color:var(--gold)}
.page-hero h1{font-weight:800;font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.3;margin-bottom:.7rem}
.page-hero p{color:#C9D6E5;max-width:56ch;font-size:1.02rem}

/* ---------- Sections ---------- */
section{padding:4.5rem 0}
.section-head{max-width:640px;margin:0 auto 3rem;text-align:center}
.eyebrow{display:inline-block;font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;font-weight:700;color:var(--gold-deep);margin-bottom:.6rem}
.section-head h2{font-weight:800;font-size:clamp(1.6rem,3.2vw,2.3rem);color:var(--navy);line-height:1.3}
.section-head p.sub{color:var(--ink-soft);margin-top:.8rem;font-size:.98rem}

/* Services grid (home teaser + full services page) */
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.service-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem 1.6rem;transition:transform .2s,box-shadow .25s,border-color .2s;position:relative;overflow:hidden}
.service-card::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:linear-gradient(90deg,var(--gold),var(--gold-deep));transform:scaleX(0);transform-origin:left;transition:transform .3s}
.service-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.service-card:hover::before{transform:scaleX(1)}
.service-icon{width:52px;height:52px;border-radius:12px;background:linear-gradient(135deg,#EDF2F8,#DEE8F2);display:grid;place-items:center;margin-bottom:1.1rem}
.service-icon svg{width:26px;height:26px}
.service-card h3{font-size:1.12rem;color:var(--navy);margin-bottom:.7rem}
.service-card p{font-size:.92rem;color:var(--ink-soft)}
.service-card ul.svc-points{list-style:none;margin-top:.9rem;display:grid;gap:.4rem}
.service-card ul.svc-points li{font-size:.86rem;color:var(--ink-soft);display:flex;gap:.45rem;align-items:flex-start}
.service-card ul.svc-points li svg{width:15px;height:15px;flex-shrink:0;margin-top:3px}
.service-card a.svc-link{display:inline-flex;align-items:center;gap:.35rem;margin-top:1.1rem;font-weight:600;font-size:.88rem;color:var(--navy);transition:color .2s,gap .2s}
.service-card a.svc-link:hover{color:var(--gold-deep);gap:.55rem}
.services-view-all{text-align:center;margin-top:2.6rem}

/* Why us */
.why{background:var(--navy);color:#fff}
.why .section-head h2{color:#fff}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.3rem}
.why-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:1.6rem 1.4rem}
.why-num{font-family:'Fraunces',serif;font-size:1.05rem;color:var(--gold);font-weight:700;margin-bottom:.55rem}
.why-card h3{font-size:1.02rem;margin-bottom:.4rem;font-weight:600}
.why-card p{font-size:.88rem;color:#B7C6D9}

/* About */
.about-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:3rem;align-items:center}
.about-visual{background:linear-gradient(150deg,var(--navy),var(--navy-soft));border-radius:20px;padding:2.4rem;color:#fff;position:relative;overflow:hidden}
.about-visual::after{content:"হাব";font-family:'Noto Serif Bengali',serif;position:absolute;right:-10px;bottom:-34px;font-size:6.2rem;font-weight:800;color:rgba(232,168,43,.1);pointer-events:none}
.about-avatar-photo{width:96px;height:96px;border-radius:50%;object-fit:cover;object-position:top center;border:3px solid var(--gold);box-shadow:0 8px 20px rgba(0,0,0,.25);margin-bottom:1.1rem}
.about-visual h3{font-size:1.35rem}
.about-visual .role{color:var(--gold);font-size:.88rem;margin-bottom:1rem}
.about-visual p{font-size:.9rem;color:#C9D6E5}
.about-text h2{font-weight:800;font-size:clamp(1.5rem,3vw,2.1rem);color:var(--navy);margin-bottom:1rem;line-height:1.35}
.about-text p{color:var(--ink-soft);margin-bottom:1rem}
.about-points{list-style:none;display:grid;gap:.7rem;margin:1.4rem 0 1.8rem}
.about-points li{display:flex;gap:.6rem;align-items:flex-start;font-size:.95rem}
.about-points svg{width:20px;height:20px;flex-shrink:0;margin-top:2px}

/* Steps */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;counter-reset:step}
.step{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem 1.6rem;position:relative}
.step::before{counter-increment:step;content:counter(step,decimal-leading-zero);font-family:'Fraunces',serif;font-weight:700;font-size:2.4rem;color:var(--gold);opacity:.85;display:block;margin-bottom:.6rem}
.step h3{font-size:1.05rem;color:var(--navy);margin-bottom:.4rem}
.step p{font-size:.9rem;color:var(--ink-soft)}

/* FAQ */
.faq-list{max-width:760px;margin:0 auto;display:grid;gap:.9rem}
details{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:1.1rem 1.4rem;transition:box-shadow .2s}
details[open]{box-shadow:var(--shadow)}
summary{cursor:pointer;font-weight:600;color:var(--navy);font-size:1rem;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:1rem}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-family:'Fraunces',serif;font-size:1.4rem;color:var(--gold-deep);transition:transform .25s}
details[open] summary::after{transform:rotate(45deg)}
details p{margin-top:.7rem;color:var(--ink-soft);font-size:.94rem}

/* Contact */
.contact{background:var(--navy-deep);color:#fff}
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start}
.contact-info h2{font-weight:800;font-size:clamp(1.5rem,3vw,2.1rem);margin-bottom:1rem;line-height:1.35}
.contact-info p{color:#B7C6D9;margin-bottom:1.6rem}
.contact-lines{list-style:none;display:grid;gap:1rem;margin-bottom:1.8rem}
.contact-lines li{display:flex;gap:.85rem;align-items:center}
.contact-lines .c-ic{width:42px;height:42px;border-radius:11px;background:rgba(232,168,43,.14);border:1px solid rgba(232,168,43,.35);display:grid;place-items:center;flex-shrink:0}
.contact-lines svg{width:20px;height:20px}
.contact-lines a,.contact-lines span{color:#E3EAF3;font-size:.96rem}
.contact-lines small{display:block;color:#8FA3BC;font-size:.78rem;letter-spacing:.06em;text-transform:uppercase}
.phone-pair{display:flex;flex-wrap:wrap;gap:.3rem 1rem}

.lead-form{background:var(--white);border-radius:18px;padding:2rem;color:var(--ink);box-shadow:0 20px 50px rgba(0,0,0,.3)}
.lead-form h3{color:var(--navy);font-size:1.25rem;margin-bottom:.3rem}
.lead-form>p{font-size:.88rem;color:var(--ink-soft);margin-bottom:1.3rem}
.field{margin-bottom:1rem}
.field label{display:block;font-size:.85rem;font-weight:600;color:var(--navy);margin-bottom:.35rem}
.field input,.field select,.field textarea{width:100%;padding:.75rem .9rem;border:1.5px solid var(--line);border-radius:10px;font-family:inherit;font-size:.95rem;background:#FBFAF7;transition:border-color .2s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--gold);outline:none}
.form-note{font-size:.78rem;color:var(--ink-soft);margin-top:.8rem;text-align:center}

/* Map (contact page) */
.map-section{padding-top:0}
.map-wrap{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);height:420px}
.map-wrap iframe{width:100%;height:100%;border:0;display:block}

/* Full services page extras */
.services-page-intro{max-width:760px;margin:0 auto 3rem;text-align:center}
.cta-strip{background:linear-gradient(135deg,var(--navy),var(--navy-soft));color:#fff;border-radius:20px;padding:2.6rem;text-align:center;margin-top:1rem}
.cta-strip h3{font-size:1.4rem;margin-bottom:.6rem}
.cta-strip p{color:#C9D6E5;margin-bottom:1.4rem;max-width:52ch;margin-left:auto;margin-right:auto}
.cta-strip .hero-actions{justify-content:center}

/* Footer */
footer{background:#040F1E;color:#8FA3BC;padding:2.8rem 0 5.5rem;font-size:.88rem}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:2rem;margin-bottom:2rem}
.footer-grid h4{color:#fff;font-size:.95rem;margin-bottom:.8rem}
.footer-grid ul{list-style:none;display:grid;gap:.5rem}
.footer-grid a:hover{color:var(--gold)}
.footer-brand p{max-width:34ch}
.footer-logo-img{height:64px;width:auto;background:#fff;padding:.5rem .8rem;border-radius:12px;margin-bottom:1rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:1.4rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.8rem}

/* ---------- Floating / sticky elements ---------- */
.float-stack{position:fixed;right:16px;bottom:88px;z-index:300;display:flex;flex-direction:column;gap:.7rem}
.fab{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;box-shadow:0 8px 22px rgba(0,0,0,.25);transition:transform .2s}
.fab:hover{transform:scale(1.08)}
.fab svg{width:26px;height:26px}
.fab-wa{background:var(--green)}
.fab-call{background:var(--navy)}
.sticky-lead{position:fixed;left:0;right:0;bottom:0;z-index:290;background:linear-gradient(90deg,var(--gold),#F2B94A);padding:.7rem 1rem;display:flex;justify-content:center;box-shadow:0 -6px 20px rgba(11,37,69,.18)}
.sticky-lead button{background:var(--navy-deep);color:#fff;border:none;border-radius:999px;padding:.7rem 1.8rem;font-family:inherit;font-weight:700;font-size:.98rem;cursor:pointer;display:inline-flex;align-items:center;gap:.55rem;transition:background .2s,transform .15s}
.sticky-lead button:hover{background:var(--navy-soft);transform:translateY(-1px)}
.sticky-lead svg{width:18px;height:18px}

@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
}

/* ---------- Mobile ---------- */
@media (max-width:900px){
  .hero .container{grid-template-columns:1fr;padding:3rem 0 3.5rem}
  .services-grid,.steps-grid{grid-template-columns:1fr 1fr}
  .why-grid{grid-template-columns:1fr 1fr}
  .about-wrap,.contact-wrap{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .topbar .container{justify-content:center;text-align:center}
  span.top_email {
    display: block;
}
  .nav-links{position:fixed;inset:64px 0 auto 0;background:var(--white);flex-direction:column;gap:0;padding:.5rem 0;border-bottom:1px solid var(--line);box-shadow:0 14px 30px rgba(11,37,69,.12);transform:translateY(-130%);transition:transform .3s;z-index:190}
  .nav-links.open{transform:translateY(0)}
  .nav-links li{border-bottom:1px solid var(--paper)}
  .nav-links a{display:block;padding:.9rem 6%}
  .hamburger{display:block}
  .nav-cta{display:none}
  .brand-logo-img{height:42px}
  .lang-switch select{padding:.45rem 1.9rem .45rem .8rem;font-size:.8rem}
  .services-grid,.steps-grid,.why-grid{grid-template-columns:1fr}
  .hero-trust{gap:1.2rem}
  section{padding:3.2rem 0}
  .footer-grid{grid-template-columns:1fr}
  .float-stack{bottom:78px;right:12px}
  .fab{width:50px;height:50px}
  .map-wrap{height:300px}
  .cta-strip{padding:2rem 1.4rem}
}