/* ব্র্যান্ড স্টাইল সিস্টেম
   রঙ: টিল (#0e5b73) + সবুজ (#82c341) — লগইন স্যাম্পলের সাথে সামঞ্জস্যপূর্ণ */
:root{
  --teal:#0e5b73; --teal-d:#0a465a; --teal-l:#1c86a8;
  --green:#82c341; --green-d:#6fae32;
  --ink:#1f2d3a; --muted:#6b7885; --line:#e6edf2;
  --bg:#f4f8fb; --white:#fff;
  --radius:14px; --shadow:0 10px 30px rgba(14,91,115,.10);
  --wrap:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:'Segoe UI',system-ui,-apple-system,'Noto Sans Bengali',sans-serif;line-height:1.6}
a{color:var(--teal);text-decoration:none}
a:hover{color:var(--teal-d)}
img{max-width:100%;display:block}
h1,h2,h3{color:var(--ink);line-height:1.2;margin:0 0 .5em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.section{padding:64px 0}
.muted{color:var(--muted)}
.center{text-align:center}

/* বাটন */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:10px;
  font-weight:700;font-size:15px;border:2px solid transparent;cursor:pointer;transition:.15s;line-height:1}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-d);color:#fff}
.btn-green{background:var(--green);color:#fff}
.btn-green:hover{background:var(--green-d);color:#fff}
.btn-outline{background:transparent;color:var(--teal);border-color:var(--teal)}
.btn-outline:hover{background:var(--teal);color:#fff}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.35)}
.btn-ghost:hover{background:rgba(255,255,255,.24);color:#fff}

/* হেডার */
.top-strip{background:var(--teal-d);color:#dff0f6;font-size:13px}
.top-strip .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;height:40px;flex-wrap:wrap;overflow:hidden}
.top-strip a{color:#dff0f6}
.top-strip .ts-r{display:flex;gap:16px;align-items:center}
header.site{background:#fff;position:sticky;top:0;z-index:50;box-shadow:0 2px 14px rgba(14,91,115,.08)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:18px;height:74px}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--teal),var(--teal-l));
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:24px;font-weight:800;flex:none;box-shadow:0 4px 12px rgba(14,91,115,.3)}
.brand-txt b{display:block;font-size:19px;font-weight:800;color:var(--teal);line-height:1.05}
.brand-txt small{color:var(--muted);font-size:12px}
.menu{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0}
.menu a{padding:10px 13px;border-radius:8px;color:var(--ink);font-weight:600;font-size:14.5px}
.menu a:hover{background:var(--bg);color:var(--teal)}
.menu a.on{color:var(--teal);background:#eef6f9}
.nav-actions{display:flex;align-items:center;gap:10px}
.burger{display:none;background:none;border:0;font-size:26px;color:var(--teal);cursor:pointer}

/* হিরো */
.hero{background:linear-gradient(135deg,var(--teal),var(--teal-l));color:#fff;position:relative;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:center;padding-top:64px;padding-bottom:64px}
.hero h1{color:#fff;font-size:40px}
.hero p{font-size:18px;color:#e6f3f8;max-width:560px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.hero-art{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.18);border-radius:20px;padding:22px}

/* কার্ড গ্রিড */
.grid{display:grid;gap:22px}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:.18s}
.card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(14,91,115,.16)}
.card .ic{width:52px;height:52px;border-radius:12px;background:#eef6f9;color:var(--teal);
  display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:14px}
.card h3{font-size:18px;margin-bottom:6px}
.card p{color:var(--muted);font-size:14.5px;margin:0}

/* সেকশন শিরোনাম */
.sec-head{text-align:center;max-width:640px;margin:0 auto 40px}
.sec-head .kick{color:var(--green-d);font-weight:800;letter-spacing:1px;text-transform:uppercase;font-size:13px}
.sec-head h2{font-size:30px;margin-top:6px}
.sec-head p{color:var(--muted)}

/* স্ট্যাট ব্যান্ড */
.stats{background:var(--teal);color:#fff}
.stats .grid{padding:44px 0;text-align:center}
.stats .n{font-size:34px;font-weight:800}
.stats .l{color:#cfe6ef;font-size:14px}

/* ফুটার */
footer.site{background:var(--teal-d);color:#cfe0e7;padding:56px 0 0}
footer.site h4{color:#fff;font-size:16px;margin-bottom:14px}
footer.site a{color:#cfe0e7}
footer.site a:hover{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px}
.foot-grid ul{list-style:none;margin:0;padding:0}
.foot-grid li{margin-bottom:9px;font-size:14.5px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding:18px 0;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:#9fc0cc}
.socials{display:flex;gap:10px}
.socials a{width:36px;height:36px;border-radius:9px;background:rgba(255,255,255,.10);
  display:flex;align-items:center;justify-content:center;color:#fff}
.socials a:hover{background:var(--green)}

/* রেসপন্সিভ */
@media(max-width:920px){
  .hero .wrap{grid-template-columns:1fr}.hero-art{display:none}
  .g-4{grid-template-columns:repeat(2,1fr)}.g-3{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .menu{display:none;position:absolute;top:74px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:stretch;padding:10px;box-shadow:var(--shadow)}
  .menu.open{display:flex}.menu a{padding:12px}
  .burger{display:block}
  .g-4,.foot-grid{grid-template-columns:1fr}
  .hero h1{font-size:30px}.section{padding:44px 0}
  .top-strip{display:none}
}