:root{--bg:#f4f7fb;--surface:#fff;--fg:#15233b;--muted:#5d6e85;--border:#dde4ec;--accent:#1b3a5f;--accent-2:#2b5688;--accent-soft:#eaf1f9;--gold:#c98a12;--good:#1f7a4d;--bad:#b3402c;--good-soft:#e6f4ec;--bad-soft:#fbeae6}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--bg:#0f1a28;--surface:#16243a;--fg:#e6edf6;--muted:#9fb0c6;--border:#26384f;--accent:#8fb6e8;--accent-2:#b4cff0;--accent-soft:#1c3150;--gold:#f0b54a;--good:#5fd29a;--bad:#ff9a87;--good-soft:#173a2a;--bad-soft:#3d221d}}
:root[data-theme="dark"]{--bg:#0f1a28;--surface:#16243a;--fg:#e6edf6;--muted:#9fb0c6;--border:#26384f;--accent:#8fb6e8;--accent-2:#b4cff0;--accent-soft:#1c3150;--gold:#f0b54a;--good:#5fd29a;--bad:#ff9a87;--good-soft:#173a2a;--bad-soft:#3d221d}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.75 'Hind Siliguri','Anek Bangla',system-ui,sans-serif}
a{color:var(--accent-2)}
.wrap{max-width:880px;margin:0 auto;padding:0 16px}
.top{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:5}
.top .wrap{display:flex;align-items:center;gap:14px;min-height:60px;flex-wrap:wrap;padding-top:8px;padding-bottom:8px}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--fg);font:700 19px/1 'Anek Bangla',sans-serif}
.brand svg{width:30px;height:30px}
.nav{display:flex;gap:4px 14px;flex-wrap:wrap;flex:1 1 auto;font-size:15px}
.nav a{text-decoration:none;color:var(--muted);padding:4px 0}
.nav a[aria-current="page"],.nav a:hover{color:var(--accent);box-shadow:inset 0 -2px 0 var(--gold)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:10px;background:var(--accent);color:#fff;text-decoration:none;font-weight:600;font-size:15px;line-height:1.2}
:root[data-theme="dark"] .btn{color:#0f1a28}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .btn{color:#0f1a28}}
.btn:hover{background:var(--accent-2)}
.btn.ghost{background:transparent;color:var(--accent);border:1px solid var(--border)}
.crumbs{font-size:14px;color:var(--muted);margin:18px 0 4px}
.crumbs a{color:var(--muted)}
.crumbs span[aria-hidden]{margin:0 6px}
h1{font:700 clamp(26px,4.4vw,36px)/1.3 'Anek Bangla',sans-serif;margin:8px 0 12px;text-wrap:balance}
h2{font:700 23px/1.35 'Anek Bangla',sans-serif;margin:34px 0 10px}
h3{font:600 18px/1.4 'Anek Bangla',sans-serif;margin:0 0 6px}
.lead{font-size:19px;color:var(--muted);margin:0 0 18px}
.hero-cta{display:flex;gap:10px;flex-wrap:wrap;margin:6px 0 10px}
main{padding-bottom:40px}
.ticks,.notes,.calc{padding-left:22px}
.ticks li,.notes li,.calc li{margin:6px 0}
.notes{background:var(--accent-soft);border-radius:12px;padding:14px 18px 14px 36px}
.steps{padding-left:24px}
.steps li{margin:10px 0}
.formula{display:inline-block;margin-top:6px;padding:6px 12px;border-radius:8px;background:var(--accent-soft);font-weight:600}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:12px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:14px 16px}
.card p{margin:0;font-size:15px;color:var(--muted)}
.table-wrap{overflow-x:auto;background:var(--surface);border:1px solid var(--border);border-radius:12px}
table{border-collapse:collapse;width:100%;min-width:460px;font-size:15px}
th,td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--border)}
th{font-weight:600;color:var(--muted)}
tr:last-child td{border-bottom:0}
.tag{display:inline-block;padding:1px 9px;border-radius:999px;font-size:13px;font-weight:600}
.tag.good{background:var(--good-soft);color:var(--good)}
.tag.bad{background:var(--bad-soft);color:var(--bad)}
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:12px 16px;margin:8px 0}
.faq summary{cursor:pointer;font-weight:600}
.faq details p{margin:8px 0 0;color:var(--muted)}
.cta-box{margin:36px 0 0;padding:22px;border-radius:14px;background:var(--surface);border:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.cta-box p{margin:0;font-weight:600}
.related{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.related a{padding:6px 12px;border-radius:999px;border:1px solid var(--border);text-decoration:none;font-size:15px;background:var(--surface)}
.law-meta{color:var(--muted);font-size:15px;margin:0 0 14px}
.law-text{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:6px 20px}
.law-text p{margin:12px 0}
.law-note{font-size:14px;color:var(--muted);margin-top:12px}
.pager{display:flex;justify-content:space-between;gap:10px;margin-top:20px;flex-wrap:wrap}
.pager a{flex:1 1 240px;padding:12px 14px;border:1px solid var(--border);border-radius:12px;text-decoration:none;background:var(--surface);font-size:15px}
.pager a.next{text-align:right}
.pager small{display:block;color:var(--muted)}
.toc h2{scroll-margin-top:80px}
.toc h3{margin-top:18px;color:var(--muted);font-size:16px}
.toc ul{list-style:none;padding:0;margin:6px 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:4px 16px}
.toc li a{text-decoration:none}
.toc li b{display:inline-block;min-width:2.6em;color:var(--muted);font-weight:600}
@media (max-width:640px){
  .top{position:static}
  .top .wrap{gap:8px 12px;min-height:0}
  .top .btn{padding:8px 13px;font-size:14px;margin-left:auto}
  .nav{order:3;flex:1 1 100%;flex-wrap:nowrap;overflow-x:auto;white-space:nowrap;gap:16px;padding-bottom:2px;scrollbar-width:none}
  .nav::-webkit-scrollbar{display:none}
  body{font-size:16px}
  .lead{font-size:17px}
}
footer{border-top:1px solid var(--border);background:var(--surface);padding:22px 0 30px;font-size:14px;color:var(--muted)}
footer nav{display:flex;flex-wrap:wrap;gap:6px 16px;margin-bottom:10px}
footer a{color:var(--muted)}