:root{
  --brand1:#312E81;--brand2:#4F46E5;--brand3:#9333EA;--accent:#F59E0B;
  --bg:#F7F7FB;--card:#FFFFFF;--text:#1F2340;--muted:#6B7090;--line:#E7E8F2;--soft:#EEF0FF;
  --grad:linear-gradient(135deg,var(--brand1) 0%,var(--brand2) 50%,var(--brand3) 100%);
  --r:20px;--shadow:0 10px 30px rgba(49,46,129,.08);--max:1180px;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0E0F1A;--card:#171828;--text:#ECEDF7;--muted:#9EA2C0;--line:#272942;--soft:#1F2140;--shadow:0 10px 30px rgba(0,0,0,.35)}}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Hind Siliguri',system-ui,sans-serif;background:var(--bg);color:var(--text);font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:13px 24px;border-radius:14px;font-weight:700;font-size:16px;border:0;cursor:pointer;transition:transform .15s,box-shadow .15s;font-family:inherit;line-height:1.2}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px rgba(79,70,229,.35)}
.btn-white{background:#fff;color:var(--brand1);box-shadow:0 10px 24px rgba(0,0,0,.18)}
.btn-ghost{background:var(--soft);color:var(--brand2)}
.btn-play{background:#111;color:#fff;padding:11px 22px;border-radius:14px}
.btn-play small{display:block;font-size:11px;font-weight:500;opacity:.8}
.btn-play b{display:block;font-size:18px}
.btn-play svg{width:28px;height:28px}

/* হেডার */
.hdr{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;gap:22px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:21px}
.brand img{width:38px;height:38px;border-radius:11px}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{padding:8px 14px;border-radius:10px;font-weight:600;color:var(--muted);font-size:16px}
.nav a:hover,.nav a.on{color:var(--brand2);background:var(--soft)}
.nav .btn{margin-left:8px;padding:10px 18px;color:#fff}
.burger{display:none;margin-left:auto;background:var(--soft);border:0;width:42px;height:42px;border-radius:12px;font-size:20px;color:var(--text);cursor:pointer}
@media(max-width:820px){
  .burger{display:block}
  .nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--card);flex-direction:column;align-items:stretch;padding:12px 16px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .nav .btn{margin:8px 0 0;justify-content:center}
}

/* অ্যাপ ব্যানার (মোবাইল) */
.appbar{display:none;align-items:center;gap:12px;padding:10px 16px;background:var(--card);border-bottom:1px solid var(--line);font-size:14px}
.appbar img{width:40px;height:40px;border-radius:10px}
.appbar .t{flex:1;line-height:1.35}.appbar .t b{display:block;font-size:15px}
.appbar .x{background:none;border:0;color:var(--muted);font-size:20px;cursor:pointer;padding:0 4px}
.appbar .btn{padding:8px 16px;font-size:14px}
@media(max-width:820px){.appbar.show{display:flex}}

/* হিরো */
.hero{background:var(--grad);color:#fff;position:relative;overflow:hidden}
.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;background:#fff;opacity:.07}
.hero:before{width:620px;height:620px;right:-180px;top:-240px}
.hero:after{width:380px;height:380px;left:-140px;bottom:-200px}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding-top:70px;padding-bottom:80px;position:relative;z-index:1}
.pill{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);padding:6px 14px;border-radius:40px;font-size:14px;font-weight:600}
.hero h1{font-size:54px;line-height:1.2;margin:18px 0 16px;font-weight:700}
.hero p.lead{font-size:20px;color:#E0E7FF;max-width:560px}
.hero .ctas{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.stats{display:flex;gap:34px;margin-top:38px;flex-wrap:wrap}
.stats b{display:block;font-size:30px;line-height:1.1}
.stats span{color:#C7D2FE;font-size:14px}
.phone{justify-self:center;width:300px;aspect-ratio:9/19;border-radius:44px;background:#0b0b14;padding:12px;box-shadow:0 40px 80px rgba(0,0,0,.4),0 0 0 2px rgba(255,255,255,.12) inset;transform:rotate(3deg)}
.phone .scr{width:100%;height:100%;border-radius:34px;overflow:hidden;background:var(--bg)}
.phone .scr img{width:100%;height:100%;object-fit:cover}
.mock{height:100%;display:flex;flex-direction:column;color:var(--text);font-size:13px}
.mock .top{background:var(--grad);color:#fff;padding:26px 16px 40px}
.mock .top b{font-size:17px;display:block}
.mock .cards{padding:0 12px;margin-top:-26px;display:grid;grid-template-columns:1fr 1fr;gap:10px}
.mock .c{background:var(--card);border-radius:16px;padding:12px;box-shadow:var(--shadow);font-weight:700}
.mock .c i{font-style:normal;font-size:22px;display:block}
.mock .q{margin:12px;background:var(--card);border-radius:16px;padding:12px;box-shadow:var(--shadow)}
.mock .o{border:1.5px solid var(--line);border-radius:10px;padding:7px 10px;margin-top:7px}
.mock .o.ok{border-color:#16a34a;background:#dcfce7;color:#14532d}
@media(max-width:900px){
  .hero .wrap{grid-template-columns:1fr;text-align:center;padding-top:48px;padding-bottom:60px}
  .hero h1{font-size:36px}.hero p.lead{font-size:18px;margin:0 auto}
  .hero .ctas,.stats{justify-content:center}
  .phone{width:240px;transform:none}
}

/* সেকশন */
.sec{padding:80px 0}
.sec-h{text-align:center;max-width:680px;margin:0 auto 46px}
.sec-h .k{color:var(--brand2);font-weight:700;font-size:15px;letter-spacing:.3px}
.sec-h h2{font-size:38px;line-height:1.25;margin:6px 0 10px}
.sec-h p{color:var(--muted)}
@media(max-width:700px){.sec{padding:56px 0}.sec-h h2{font-size:28px}}
.grid{display:grid;gap:20px}
.g4{grid-template-columns:repeat(4,1fr)}.g3{grid-template-columns:repeat(3,1fr)}
@media(max-width:980px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.g4,.g3{grid-template-columns:1fr}}
.feat{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px;transition:transform .2s,box-shadow .2s}
.feat:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.feat .ic{width:54px;height:54px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:27px;margin-bottom:14px}
.feat h3{font-size:19px;margin-bottom:4px}
.feat p{color:var(--muted);font-size:15px;line-height:1.6}
.exams{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.exams span{background:var(--card);border:1px solid var(--line);padding:10px 20px;border-radius:40px;font-weight:600}
.shots{display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 4px 18px}
.shots img{flex:none;width:230px;border-radius:24px;scroll-snap-align:center;box-shadow:var(--shadow);border:1px solid var(--line)}
.steps{counter-reset:s}
.step{background:var(--card);border-radius:var(--r);padding:28px;border:1px solid var(--line);position:relative}
.step:before{counter-increment:s;content:counter(s,bengali);position:absolute;top:-18px;left:24px;width:40px;height:40px;border-radius:12px;background:var(--grad);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:20px}
.step h3{margin:10px 0 4px;font-size:19px}.step p{color:var(--muted);font-size:15px}
.faq{max-width:820px;margin:0 auto}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px 22px;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:700;font-size:17px;list-style:none;display:flex;justify-content:space-between;gap:10px}
.faq summary:after{content:"+";color:var(--brand2);font-size:24px;line-height:1}
.faq details[open] summary:after{content:"−"}
.faq details p{color:var(--muted);margin-top:10px}
.cta{background:var(--grad);border-radius:30px;color:#fff;padding:56px 40px;text-align:center;position:relative;overflow:hidden}
.cta h2{font-size:36px;line-height:1.25}.cta p{color:#E0E7FF;margin:10px auto 26px;max-width:560px}
@media(max-width:600px){.cta{padding:40px 22px}.cta h2{font-size:27px}}

/* ব্লগ কার্ড */
.pc{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.pc:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.pc .im{aspect-ratio:16/9;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-size:42px;overflow:hidden}
.pc .im img{width:100%;height:100%;object-fit:cover}
.pc .bd{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.pc .cat{color:var(--brand2);font-size:13px;font-weight:700}
.pc h3{font-size:19px;line-height:1.45;margin:4px 0 8px}
.pc p{color:var(--muted);font-size:15px;line-height:1.6;flex:1}
.pc .meta{color:var(--muted);font-size:13px;margin-top:12px}
.feat-post{display:grid;grid-template-columns:1.2fr 1fr;background:var(--card);border:1px solid var(--line);border-radius:26px;overflow:hidden;margin-bottom:30px}
.feat-post .im{min-height:300px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:60px}
.feat-post .im img{width:100%;height:100%;object-fit:cover}
.feat-post .bd{padding:34px;display:flex;flex-direction:column;justify-content:center}
.feat-post h2{font-size:30px;line-height:1.35;margin:8px 0}
.feat-post p{color:var(--muted)}
@media(max-width:800px){.feat-post{grid-template-columns:1fr}.feat-post .im{min-height:200px}.feat-post h2{font-size:24px}.feat-post .bd{padding:22px}}
.bhead{background:var(--grad);color:#fff;padding:54px 0 46px;text-align:center}
.bhead h1{font-size:40px;line-height:1.25}.bhead p{color:#E0E7FF;margin-top:6px}
.search{display:flex;max-width:520px;margin:22px auto 0;background:#fff;border-radius:16px;padding:6px;box-shadow:0 10px 30px rgba(0,0,0,.18)}
.search input{flex:1;border:0;outline:0;padding:10px 14px;font:inherit;font-size:16px;background:transparent;color:#1F2340}
.search button{border:0;background:var(--grad);color:#fff;border-radius:12px;padding:0 20px;font:inherit;font-weight:700;cursor:pointer}
.chips{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin:26px 0 30px}
.chips a{padding:8px 18px;border-radius:40px;background:var(--card);border:1px solid var(--line);font-weight:600;font-size:15px}
.chips a.on,.chips a:hover{background:var(--brand2);border-color:var(--brand2);color:#fff}
.empty{text-align:center;padding:60px 20px;color:var(--muted)}
.empty div{font-size:52px}

/* পোস্ট পেজ */
.art{max-width:780px;margin:0 auto;padding:40px 20px 30px}
.crumb{font-size:14px;color:var(--muted);margin-bottom:14px}
.crumb a{color:var(--brand2);font-weight:600}
.art h1{font-size:40px;line-height:1.3}
.art .meta{display:flex;flex-wrap:wrap;gap:16px;color:var(--muted);font-size:15px;margin:14px 0 24px}
.art .cover{border-radius:22px;overflow:hidden;margin-bottom:30px;box-shadow:var(--shadow)}
@media(max-width:700px){.art h1{font-size:28px}.art{padding-top:26px}}
.prose{font-size:18.5px;line-height:1.95}
.prose>*+*{margin-top:1.05em}
.prose h2{font-size:28px;line-height:1.35;margin-top:1.6em}
.prose h3{font-size:22px;line-height:1.4;margin-top:1.4em}
.prose a{color:var(--brand2);text-decoration:underline;text-underline-offset:3px}
.prose ul,.prose ol{padding-left:1.4em}
.prose li+li{margin-top:.35em}
.prose blockquote{border-left:4px solid var(--brand2);background:var(--soft);padding:14px 20px;border-radius:0 14px 14px 0}
.prose img{border-radius:16px;margin:1.4em auto}
.prose table{width:100%;border-collapse:collapse;font-size:16px;display:block;overflow-x:auto}
.prose th,.prose td{border:1px solid var(--line);padding:9px 12px;text-align:left}
.prose th{background:var(--soft)}
.prose pre{background:#0f1020;color:#e5e7ff;padding:16px;border-radius:14px;overflow-x:auto;font-size:15px}
.prose iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:16px}
.prose .ql-align-center{text-align:center}.prose .ql-align-right{text-align:right}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:30px}
.tags a{background:var(--soft);color:var(--brand2);padding:5px 14px;border-radius:30px;font-size:14px;font-weight:600}
.share{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:26px;padding-top:22px;border-top:1px solid var(--line)}
.share b{margin-right:4px}
.share a,.share button{border:0;cursor:pointer;font:inherit;font-size:14px;font-weight:700;padding:9px 16px;border-radius:12px;color:#fff}
.appbox{display:flex;gap:18px;align-items:center;background:var(--grad);color:#fff;border-radius:22px;padding:22px 24px;margin:34px 0}
.appbox img{width:66px;height:66px;border-radius:18px;flex:none;box-shadow:0 8px 20px rgba(0,0,0,.25)}
.appbox .t{flex:1}.appbox b{font-size:19px;display:block}.appbox span{color:#E0E7FF;font-size:15px;line-height:1.5;display:block}
@media(max-width:600px){.appbox{flex-direction:column;text-align:center}}
.pn{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:30px}
.pn a{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px 18px;font-weight:600;line-height:1.45}
.pn a small{display:block;color:var(--muted);font-weight:500}
.pn a.n{text-align:right;grid-column:2}
@media(max-width:600px){.pn{grid-template-columns:1fr}.pn a.n{grid-column:auto}}

/* পেজিনেশন */
.pager{display:flex;gap:8px;justify-content:center;margin-top:40px;flex-wrap:wrap}
.pager a,.pager span{min-width:42px;height:42px;padding:0 14px;display:flex;align-items:center;justify-content:center;border-radius:12px;background:var(--card);border:1px solid var(--line);font-weight:600}
.pager .on{background:var(--brand2);color:#fff;border-color:var(--brand2)}
.pager .dis{opacity:.45}

/* ফুটার */
.ftr{background:#0F1024;color:#B9BCD8;padding:60px 0 26px;margin-top:80px;font-size:15px}
.ftr .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.ftr h4{color:#fff;font-size:16px;margin-bottom:12px}
.ftr a{display:block;padding:3px 0}.ftr a:hover{color:#fff}
.ftr .brand{color:#fff;margin-bottom:12px}
.ftr .soc{display:flex;gap:10px;margin-top:14px}
.ftr .soc a{width:40px;height:40px;border-radius:12px;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;padding:0}
.ftr .soc svg{width:19px;height:19px;fill:#fff}
.ftr .bot{border-top:1px solid rgba(255,255,255,.08);margin-top:40px;padding-top:20px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;font-size:14px}
@media(max-width:800px){.ftr .cols{grid-template-columns:1fr 1fr}.ftr .cols>div:first-child{grid-column:1/-1}}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s,transform .6s}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}