:root{--blue:#1e63b5;--navy:#12305a;--bg:#f3f6fb;--card:#fff;--ink:#0f1b2d;--muted:#5b6678;--line:#e1e7f0;--soft:#e8f0fb;}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,"Segoe UI","Noto Sans Bengali",Roboto,sans-serif;
     background:var(--bg);color:var(--ink);line-height:1.8;}
.wrap{max-width:780px;margin:0 auto;padding:24px 16px 60px;}
header{background:linear-gradient(135deg,var(--navy),#1f6fc0);color:#fff;border-radius:20px;padding:28px 24px;margin-bottom:10px;}
header h1{margin:0 0 6px;font-size:23px;font-weight:800;}
header .sub{opacity:.93;font-size:14px;}
.meta{font-size:12.5px;color:var(--muted);margin:14px 2px 20px;}
.summary{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin-bottom:20px;font-size:15px;}
.bn{color:var(--muted);font-size:14px;margin-top:8px;}
section{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin-bottom:14px;}
section h2{margin:0 0 10px;font-size:17px;color:var(--navy);}
ul{margin:0;padding-left:20px;}
li{margin:7px 0;font-size:15px;}
a{color:var(--blue);}
.tw{overflow-x:auto;-webkit-overflow-scrolling:touch;margin-top:6px;}
table{border-collapse:collapse;width:100%;min-width:560px;font-size:14px;}
th,td{text-align:left;vertical-align:top;padding:9px 10px;border-bottom:1px solid var(--line);}
th{color:var(--navy);font-weight:700;white-space:nowrap;}
code{background:rgba(30,99,181,.09);padding:1px 5px;border-radius:5px;font-size:12.5px;}
.contact{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin-top:20px;font-size:14.5px;}
.links{display:grid;gap:12px;margin-top:6px;}
.links a{display:block;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 18px;text-decoration:none;color:var(--ink);font-weight:700;}
.links a span{display:block;font-weight:400;color:var(--muted);font-size:14px;}
footer{text-align:center;color:var(--muted);font-size:12.5px;margin-top:26px;}
@media(prefers-color-scheme:dark){
  :root{--bg:#0c1422;--card:#152033;--ink:#eaf0f8;--muted:#9ba8bc;--line:#26354d;--soft:#16233a;}
  section h2,th{color:#8fbcff;}
  a{color:#8fbcff;}
  code{background:rgba(143,188,255,.14);}
}