:root{
  --accent:#0EA5A0;
  --accent-dark:#0B7E7A;
  --ink:#1F2937;
  --muted:#6B7280;
  --line:#E5E7EB;
  --bg:#F8FAFA;
  --card:#FFFFFF;
  --radius:14px;
  --shadow:0 1px 3px rgba(16,24,40,.06),0 1px 2px rgba(16,24,40,.04);
  --max:1080px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans Bengali","Hind Siliguri",Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.65;
  display:flex;flex-direction:column;min-height:100vh;
}
a{color:inherit;text-decoration:none}
main{flex:1}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--max);margin:0 auto;padding:14px 22px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand-badge{width:34px;height:34px;border-radius:9px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;letter-spacing:.5px}
.brand-name{font-size:17px}
.nav-links{display:flex;gap:26px}
.nav-links a{color:var(--muted);font-size:15px;font-weight:500;padding:4px 0;border-bottom:2px solid transparent;transition:.15s}
.nav-links a:hover{color:var(--ink)}
.nav-links a.on{color:var(--accent);border-bottom-color:var(--accent)}
.navtoggle,.navburger{display:none}

/* ---------- hero ---------- */
.hero{background:linear-gradient(180deg,#fff 0%,var(--bg) 100%);border-bottom:1px solid var(--line)}
.hero-inner{max-width:var(--max);margin:0 auto;padding:72px 22px 60px;text-align:center}
.hero-eyebrow{text-transform:uppercase;letter-spacing:2px;font-size:12px;font-weight:600;color:var(--accent);margin-bottom:14px}
.hero-title{font-size:clamp(28px,5vw,46px);font-weight:800;line-height:1.15;letter-spacing:-.5px}
.hero-sub{max-width:600px;margin:18px auto 0;color:var(--muted);font-size:17px}

/* ---------- cards ---------- */
.cards-wrap{max-width:var(--max);margin:0 auto;padding:48px 22px 70px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s,border-color .18s;display:flex;flex-direction:column;position:relative}
.card[href]:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(16,24,40,.10);border-color:transparent}
.card-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;color:var(--c);background:color-mix(in srgb,var(--c) 12%,#fff);margin-bottom:18px}
.card-icon svg{width:26px;height:26px}
.card-title{font-size:18px;font-weight:700}
.card-desc{color:var(--muted);font-size:14.5px;margin-top:6px;flex:1}
.card-go{margin-top:16px;font-weight:600;font-size:14.5px;color:var(--c)}
.card-soon{opacity:.78}
.card-badge{margin-top:16px;display:inline-block;width:fit-content;font-size:12px;font-weight:600;color:var(--muted);background:#F3F4F6;padding:4px 11px;border-radius:20px}

/* ---------- generic page ---------- */
.page{max-width:var(--max);margin:0 auto;padding:60px 22px 20px}
.page-inner{max-width:760px}
.page-title{font-size:clamp(26px,4vw,38px);font-weight:800;letter-spacing:-.5px;margin-top:6px}
.lead{font-size:18px;color:var(--muted);margin-top:16px}
.prose{margin-top:34px}
.prose h2{font-size:20px;margin:28px 0 8px}
.prose p{color:#374151}
.btn{display:inline-block;margin-top:30px;background:var(--accent);color:#fff;font-weight:600;padding:12px 24px;border-radius:10px;border:none;cursor:pointer;font-size:15px;transition:.15s}
.btn:hover{background:var(--accent-dark)}

/* ---------- services list ---------- */
.services-list{max-width:860px;margin:10px auto 70px;padding:0 22px;display:flex;flex-direction:column;gap:14px}
.srow{display:flex;align-items:center;gap:18px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow)}
.srow-icon{flex:none;width:46px;height:46px;border-radius:11px;display:flex;align-items:center;justify-content:center;color:var(--c);background:color-mix(in srgb,var(--c) 12%,#fff)}
.srow-icon svg{width:25px;height:25px}
.srow-body{flex:1}
.srow-body h3{font-size:17px;font-weight:700}
.srow-body p{color:var(--muted);font-size:14px;margin-top:2px}
.srow-btn{flex:none;color:#fff;background:var(--c);font-weight:600;font-size:14px;padding:9px 18px;border-radius:9px;transition:.15s;filter:saturate(1)}
.srow-btn:hover{filter:brightness(.93)}
.srow-soon{flex:none;font-size:12.5px;font-weight:600;color:var(--muted);background:#F3F4F6;padding:7px 14px;border-radius:20px}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:34px;margin-top:36px}
.contact-info{display:flex;flex-direction:column;gap:18px}
.ci-item{display:flex;flex-direction:column;gap:3px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.ci-item span{font-size:12px;text-transform:uppercase;letter-spacing:1px;color:var(--muted);font-weight:600}
.ci-item a,.ci-item b{font-size:16px;font-weight:600;color:var(--ink)}
.contact-form label{display:block;font-size:14px;font-weight:600;margin-bottom:14px}
.contact-form input,.contact-form textarea{width:100%;margin-top:6px;padding:11px 13px;border:1px solid var(--line);border-radius:9px;font:inherit;font-weight:400;background:#fff;transition:.15s}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 18%,#fff)}
.alert{padding:13px 16px;border-radius:10px;font-size:14.5px;margin-bottom:6px}
.alert.ok{background:#ECFDF5;color:#065F46;border:1px solid #A7F3D0}
.alert.err{background:#FEF2F2;color:#991B1B;border:1px solid #FECACA}

/* ---------- footer ---------- */
.foot{background:#0F1A1A;color:#D1D5DB;margin-top:auto}
.foot-inner{max-width:var(--max);margin:0 auto;padding:40px 22px 26px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:24px}
.foot-brand{font-size:18px;font-weight:700;color:#fff}
.foot-tag{color:#9CA3AF;font-size:14px;margin-top:4px}
.foot-contact{display:flex;flex-direction:column;gap:6px;font-size:14px;text-align:right}
.foot-contact a:hover{color:#fff}
.foot-bar{border-top:1px solid #1F2A2A;text-align:center;padding:16px;font-size:13px;color:#6B7280}

/* ---------- mobile ---------- */
@media(max-width:720px){
  .navburger{display:flex;flex-direction:column;gap:5px;cursor:pointer;padding:6px}
  .navburger span{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}
  .nav-links{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:6px 22px 14px;display:none}
  .nav-links a{padding:12px 0;border-bottom:1px solid var(--line)}
  .navtoggle:checked~.nav-links{display:flex}
  .contact-grid{grid-template-columns:1fr}
  .foot-inner{flex-direction:column}
  .foot-contact{text-align:left}
  .srow{flex-wrap:wrap}
}