/* হিসাবনিকাশ — shared styles (no external dependencies, mobile-first) */
:root{
  --bg:#f6f4ee; --card:#ffffff; --ink:#1c1a17; --muted:#6f6a61;
  --brand:#0e7a4d; --brand-dark:#0a5c3a; --brand-soft:#e3f2ea;
  --line:#e7e2d6; --warn:#fff7e6; --warn-line:#f0d48a;
  --radius:16px; --shadow:0 6px 24px rgba(28,26,23,.07);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:"Noto Sans Bengali","Hind Siliguri","SolaimanLipi",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  line-height:1.75; font-size:17px;
}
a{color:var(--brand-dark)}
.wrap{max-width:960px;margin:0 auto;padding:0 18px}
/* header */
.topbar{background:var(--brand-dark);color:#fff;position:sticky;top:0;z-index:20}
.topbar .wrap{display:flex;align-items:center;gap:14px;padding:12px 18px}
.logo{font-weight:800;font-size:20px;color:#fff;text-decoration:none;white-space:nowrap}
.logo span{color:#ffd968}
.nav{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap}
.nav a{color:#eaf5ee;text-decoration:none;font-size:14.5px;padding:6px 10px;border-radius:8px}
.nav a:hover,.nav a.active{background:rgba(255,255,255,.14)}
/* hero */
.hero{padding:34px 0 8px}
.hero h1{font-size:30px;line-height:1.45;margin:0 0 8px}
.hero p.lead{color:var(--muted);margin:0 0 6px;font-size:17px}
.badge{display:inline-block;background:var(--brand-soft);color:var(--brand-dark);font-size:13.5px;
  padding:4px 12px;border-radius:999px;margin-bottom:10px;font-weight:600}
/* calculator card */
.calc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px;margin:20px 0}
.calc h2{margin:0 0 14px;font-size:21px}
label.field{display:block;font-weight:600;margin:14px 0 6px;font-size:15.5px}
input[type=text],input[type=number],select{
  width:100%;padding:13px 14px;font-size:18px;border:2px solid var(--line);
  border-radius:12px;background:#fff;color:var(--ink);font-family:inherit}
input:focus,select:focus{outline:none;border-color:var(--brand)}
.hint{font-size:13.5px;color:var(--muted);margin-top:4px}
/* method pills */
.pills{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 4px}
.pills label{cursor:pointer}
.pills input{position:absolute;opacity:0;pointer-events:none}
.pills span{display:inline-block;padding:9px 15px;border:2px solid var(--line);border-radius:999px;
  font-size:14.5px;font-weight:600;background:#fff;transition:.15s}
.pills input:checked+span{background:var(--brand);border-color:var(--brand);color:#fff}
.pills input:focus-visible+span{outline:2px solid var(--brand-dark);outline-offset:2px}
/* mode switch */
.modes{display:flex;background:#efece3;border-radius:12px;padding:4px;margin:4px 0 6px}
.modes button{flex:1;border:0;background:transparent;padding:10px;border-radius:9px;
  font-size:15px;font-weight:700;color:var(--muted);cursor:pointer;font-family:inherit}
.modes button.on{background:#fff;color:var(--brand-dark);box-shadow:0 2px 8px rgba(0,0,0,.08)}
/* results */
.result{background:var(--brand-dark);color:#fff;border-radius:var(--radius);padding:20px;margin-top:18px}
.result .row{display:flex;justify-content:space-between;gap:10px;padding:7px 0;
  border-bottom:1px dashed rgba(255,255,255,.25);font-size:16px}
.result .row:last-child{border-bottom:0}
.result .row b{font-size:18px}
.result .big{font-size:15px;opacity:.85}
.result .big b{font-size:26px;color:#ffd968}
.verified{font-size:13px;opacity:.75;margin-top:10px}
/* tables */
table.fees{width:100%;border-collapse:collapse;margin:14px 0;font-size:15.5px;background:#fff;
  border-radius:12px;overflow:hidden}
table.fees th,table.fees td{padding:11px 12px;border-bottom:1px solid var(--line);text-align:left}
table.fees th{background:var(--brand-soft);color:var(--brand-dark)}
table.fees tr:last-child td{border-bottom:0}
/* content sections */
.section{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;margin:20px 0}
.section h2{font-size:21px;margin:0 0 10px}
.section h3{font-size:18px;margin:18px 0 6px}
.notice{background:var(--warn);border:1px solid var(--warn-line);border-radius:12px;
  padding:12px 15px;font-size:14.5px;margin:14px 0}
/* faq */
details.faq{border:1px solid var(--line);border-radius:12px;margin:10px 0;background:#fff;overflow:hidden}
details.faq summary{cursor:pointer;padding:13px 16px;font-weight:700;font-size:16px;list-style:none}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";float:left;margin-right:10px;color:var(--brand);font-size:20px;line-height:1.2}
details.faq[open] summary::after{content:"–"}
details.faq .a{padding:0 16px 15px;color:#3d3a34;font-size:15.5px}
/* cards grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:16px 0}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;
  text-decoration:none;color:var(--ink);display:block;transition:.15s}
.card:hover{border-color:var(--brand);box-shadow:var(--shadow);transform:translateY(-2px)}
.card .ic{font-size:30px}
.card h3{margin:8px 0 4px;font-size:17.5px;color:var(--brand-dark)}
.card p{margin:0;font-size:14px;color:var(--muted)}
/* footer */
footer{background:#221f1a;color:#cfc9bc;margin-top:36px}
footer .wrap{padding:26px 18px;font-size:14px}
footer a{color:#ffd968}
footer .dis{opacity:.75;font-size:13px;margin-top:10px}
/* print */
@media print{.topbar,.nav,footer,.noprint{display:none}}
@media (max-width:560px){
  body{font-size:16px}
  .hero h1{font-size:24px}
  .calc{padding:16px}
  .nav a{font-size:13px;padding:5px 7px}
}