:root{--blue:#0a2fd1;--blue-d:#071f94;--red:#e11919;--ink:#1b2133;--muted:#5d6678;--line:#dfe3ee;--bg:#f6f8fd;--card:#fff;--ok:#0f8a4b}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Hind Siliguri","Noto Sans Bengali",system-ui,-apple-system,Segoe UI,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65}
a{color:var(--blue);text-decoration:none}
img{max-width:100%;height:auto}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}

/* header */
.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.top .wrap{display:flex;align-items:center;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700}
.brand img{width:44px;height:44px;border-radius:50%}
.brand small{display:block;font-weight:500;color:var(--muted);font-size:.72rem;line-height:1.1}
.nav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.nav a{padding:8px 12px;border-radius:8px;color:var(--ink);font-weight:600;font-size:.95rem}
.nav a:hover{background:var(--bg)}
.nav a.on{background:var(--blue);color:#fff}

/* hero */
.hero{background:linear-gradient(135deg,var(--blue-d),var(--blue));color:#fff;padding:48px 0}
.hero .wrap{display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center}
.hero h1{margin:0 0 8px;font-size:2.1rem;line-height:1.25}
.hero p{margin:0 0 6px;opacity:.92}
.hero .en{letter-spacing:.04em;font-weight:600;color:#ffd6d6}
.hero .logo{justify-self:center;background:#fff;border-radius:50%;padding:6px;width:min(260px,70vw)}
.hero .logo img{border-radius:50%;display:block}
.btns{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.btn{display:inline-block;border:0;cursor:pointer;font:inherit;font-weight:700;padding:11px 20px;border-radius:10px;background:var(--red);color:#fff}
.btn:hover{filter:brightness(1.07)}
.btn.alt{background:#fff;color:var(--blue)}
.btn.blue{background:var(--blue)}
.btn.sm{padding:6px 12px;font-size:.88rem;border-radius:8px}
.btn.gray{background:#e9ecf5;color:var(--ink)}
.btn.danger{background:#fff;color:var(--red);border:1px solid var(--red)}

/* sections */
section.s{padding:36px 0}
h2.t{margin:0 0 18px;font-size:1.5rem;border-left:5px solid var(--red);padding-left:12px}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px}
.card h3{margin:0 0 4px;font-size:1.05rem}
.card .en{color:var(--muted);font-size:.88rem}
.course{display:flex;gap:12px;align-items:flex-start}
.num{flex:0 0 34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:700;font-size:.9rem}
.post .date{color:var(--red);font-weight:700;font-size:.85rem}
.tag{display:inline-block;background:#eaf0ff;color:var(--blue);padding:2px 10px;border-radius:999px;font-size:.8rem;font-weight:600}
.docs{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.docs figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px}
.docs figcaption{text-align:center;font-weight:600;margin-top:6px}
.video{aspect-ratio:16/9;width:100%;border:0;border-radius:10px;background:#000}

/* forms */
form.f{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;max-width:640px}
label{display:block;font-weight:600;margin:12px 0 4px}
input[type=text],input[type=email],input[type=password],input[type=url],input[type=date],input[type=number],input[type=tel],select,textarea{width:100%;padding:10px 12px;border:1px solid #c9cfe0;border-radius:10px;font:inherit;background:#fff}
textarea{min-height:100px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid #b9c7ff;border-color:var(--blue)}
.hp{position:absolute;left:-9999px;opacity:0;height:0;overflow:hidden}
.err{color:var(--red);font-size:.88rem;margin-top:4px}
.flash{background:#e7f8ef;border:1px solid #9edbb9;color:#0a5c33;padding:10px 14px;border-radius:10px;margin-bottom:14px}
.codebox{background:#fff;border:2px dashed var(--blue);border-radius:14px;padding:18px;max-width:640px;margin-bottom:18px;text-align:center}
.codebox b{display:block;font-size:2rem;letter-spacing:.2em;color:var(--blue);margin:6px 0}
.status{display:inline-block;padding:3px 12px;border-radius:999px;background:#fff3cd;color:#7a5a00;font-weight:700;font-size:.85rem}
.status.admitted,.status.resolved,.status.replied,.status.contacted{background:#e1f6e9;color:var(--ok)}
.status.rejected{background:#fde4e4;color:var(--red)}
.reply{background:#f1f5ff;border-left:4px solid var(--blue);padding:10px 14px;border-radius:8px;margin-top:10px;white-space:pre-line}
.muted{color:var(--muted)}

/* footer */
.foot{background:#0d1330;color:#cfd5ee;padding:28px 0;margin-top:36px;font-size:.92rem}
.foot b{color:#fff}
.foot .tag2{color:#ffb4b4;font-weight:600}

/* admin */
.adm{background:#f1f3f9}
.adm .top .nav a{font-size:.9rem;padding:6px 10px}
.stats{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));margin-bottom:20px}
.stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px}
.stat b{display:block;font-size:1.8rem;color:var(--blue)}
.badge{background:var(--red);color:#fff;border-radius:999px;padding:0 7px;font-size:.75rem;margin-left:4px}
table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;font-size:.93rem}
th{background:#eef1fa}
.tblwrap{overflow-x:auto}
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 14px;margin-bottom:10px}
summary{cursor:pointer;font-weight:600}
.row{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.inline{display:inline}
.pager{margin-top:14px}.pager nav>div:first-child{display:none}
.pager svg{width:18px;height:18px}

@media(max-width:720px){
  .hero .wrap{grid-template-columns:1fr}
  .hero h1{font-size:1.6rem}
  .nav{margin-left:0;width:100%}
}