/* RateBazar — Design C: warm cream newspaper. Serif display + readable sans.
   Hand-written, system font stacks only. Mobile-first, max-width 1080px. */
:root{
  --paper:#FBF5E9; --paper-soft:#FAF3E3; --card:#FFFDF6;
  --ink:#1F1B14; --ink-soft:#3E382C; --muted:#5F5747;
  --green:#14532D; --green-dark:#0C3A1F; --green-mid:#1B6B3C;
  --gold:#C9A227; --gold-dark:#8A6D14; --gold-tint:#F3E5BE; --hl:#F1E2B4;
  --line:#E3D7BC; --line-dark:#CDBFA0; --red:#B3261E;
  --serif:Georgia,"Times New Roman","Noto Serif Bengali","Noto Naskh Arabic",serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans Bengali","Noto Sans Arabic",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;font-size:18px}
body{margin:0;font-family:var(--sans);
  background:var(--paper);color:var(--ink);line-height:1.65;font-size:1rem}
[lang="bn"] body,body.bn{font-family:"Noto Sans Bengali",var(--sans)}
::selection{background:var(--gold-tint)}
a{color:var(--green-mid);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}
h1,h2,h3{font-family:var(--serif)}
main h3{color:var(--green-dark)}

/* header — deep green masthead band, sticky, big Install button */
.site-header{background:linear-gradient(180deg,var(--green),var(--green-dark));color:#FBF5E9;
  position:sticky;top:0;z-index:50;border-bottom:3px solid var(--gold);
  box-shadow:0 2px 10px rgba(31,27,20,.25)}
.site-header .wrap{display:flex;align-items:center;gap:12px;padding-top:11px;padding-bottom:11px}
.brand{display:flex;align-items:center;gap:10px;color:#FBF5E9;font-size:1.35rem;font-weight:700;
  font-family:var(--serif);letter-spacing:.2px}
.brand:hover{text-decoration:none}
.brand em{font-style:normal;color:var(--gold)}
.brand small{display:block;font-size:.62rem;font-weight:600;color:#E9DFC4;letter-spacing:.5px;
  font-family:var(--sans)}
.logo-badge{flex:0 0 auto;display:flex}
.install-btn{margin-inline-start:auto;background:var(--gold);color:#231A00;border:0;border-radius:999px;
  padding:12px 22px;font-weight:800;font-size:1rem;font-family:var(--sans);cursor:pointer;
  box-shadow:0 2px 8px rgba(0,0,0,.35)}
.install-btn:active{transform:scale(.97)}

/* hero — front-page panel on cream, thick gold rule under */
.hero{background:var(--paper-soft);color:var(--ink);padding:32px 0 28px;
  border-bottom:4px solid var(--gold);box-shadow:0 1px 0 var(--green)}
.hero h1{margin:0 0 8px;font-size:2rem;line-height:1.22;color:var(--ink)}
@media(min-width:640px){.hero h1{font-size:2.5rem}}
.hero h1 .gold{color:var(--gold-dark)}
.hero p{margin:0;color:var(--ink-soft);max-width:640px;font-size:1.05rem}
.ticker{display:grid;grid-template-columns:1fr;gap:12px;margin:22px 0 6px}
@media(min-width:640px){.ticker{grid-template-columns:repeat(3,1fr)}}
.tick{background:var(--card);border:1px solid var(--line);border-top:4px solid var(--gold);
  border-radius:10px;padding:16px 18px;box-shadow:0 2px 6px rgba(31,27,20,.07)}
.tick .t-label{font-size:.85rem;color:var(--green-dark);font-weight:700}
.tick .t-price{font-family:var(--serif);font-size:1.9rem;font-weight:700;color:var(--ink);
  margin:2px 0;font-variant-numeric:tabular-nums}
.tick .t-price .cur{color:var(--gold-dark);font-size:1.1rem}
.tick .t-sub{font-size:.82rem;color:var(--muted)}

/* sections + cards — newspaper panels */
section{padding:26px 0 6px}
h2.sec{font-size:1.45rem;margin:0 0 6px;color:var(--green-dark);line-height:1.3;
  border-bottom:2px solid var(--line);padding-bottom:8px}
.sec-sub{color:var(--muted);margin:0 0 16px;font-size:.98rem}
.grid{display:grid;grid-template-columns:1fr;gap:14px}
@media(min-width:640px){.grid{grid-template-columns:1fr 1fr}}
@media(min-width:900px){.grid.tools{grid-template-columns:repeat(3,1fr)}}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:20px 22px;
  box-shadow:0 1px 4px rgba(31,27,20,.06);display:block;color:var(--ink)}
a.card:hover{text-decoration:none;border-color:var(--gold);box-shadow:0 4px 14px rgba(31,27,20,.12)}
.card h3{margin:0 0 6px;font-size:1.15rem;color:var(--green-dark);line-height:1.35}
.card p{margin:0;color:var(--muted);font-size:.95rem}
.card .flag{font-size:1.6rem;line-height:1}
.badge{display:inline-block;background:var(--gold);color:#231A00;font-size:.68rem;font-weight:800;
  font-family:var(--sans);border-radius:999px;padding:2px 9px;vertical-align:middle;margin-inline-start:6px}
.badge.soon{background:#EAE0C6;color:#6B6242}

/* answer box (AEO) — highlighted front-page fact panel */
.answer-box{background:#FFF8E1;border:2px solid var(--gold);border-radius:10px;
  padding:18px 22px;margin:18px 0;box-shadow:0 2px 6px rgba(31,27,20,.06)}
.answer-box .q{font-family:var(--serif);font-weight:700;color:var(--green-dark);margin:0 0 4px;font-size:1.05rem}
.answer-box .a{font-family:var(--serif);font-size:1.5rem;font-weight:700;margin:0;color:var(--ink);
  font-variant-numeric:tabular-nums;line-height:1.35}
.answer-box .a .cur{color:var(--gold-dark)}
.answer-box .src{font-size:.85rem;color:var(--muted);margin-top:6px}

/* tables — cream panels, green header, zebra rows */
table.rates{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);
  border-radius:10px;overflow:hidden;box-shadow:0 1px 4px rgba(31,27,20,.06);font-size:1rem}
table.rates th{background:var(--green);color:#FBF5E9;font-family:var(--serif);text-align:start;
  padding:12px 14px;font-size:.95rem}
table.rates td{padding:12px 14px;border-top:1px solid var(--line)}
table.rates tbody tr:nth-child(even) td{background:#FAF1DA}
table.rates tr td:first-child{font-weight:700;color:var(--green-dark)}
table.rates td.num,table.rates th.num{text-align:end;font-variant-numeric:tabular-nums}
table.rates tbody tr.hl td{background:var(--hl);font-weight:700}
.updated-line{font-size:.88rem;color:var(--muted);margin:10px 2px 0}
.updated-line b{color:var(--green-dark)}

/* calculator */
.calc{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:22px;
  box-shadow:0 1px 4px rgba(31,27,20,.06)}
.calc label{display:block;font-weight:700;font-size:.95rem;margin:14px 0 6px;color:var(--green-dark)}
.calc label:first-child{margin-top:0}
.calc input,.calc select{width:100%;padding:13px;border:1.5px solid var(--line-dark);border-radius:8px;
  font-size:1.05rem;background:#FFFDF8;color:var(--ink);font-family:inherit}
.calc input:focus,.calc select:focus{outline:2px solid var(--gold);border-color:var(--gold)}
.calc .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.result{margin-top:18px;background:linear-gradient(135deg,var(--green-dark),var(--green));color:#FBF5E9;
  border-radius:10px;padding:18px 22px;display:none;box-shadow:0 2px 8px rgba(31,27,20,.15)}
.result.show{display:block}
.result .r-label{font-size:.88rem;color:#E9DFC4}
.result .r-value{font-family:var(--serif);font-size:2rem;font-weight:700;color:var(--gold);
  font-variant-numeric:tabular-nums;line-height:1.3}
.result .r-line{display:flex;justify-content:space-between;padding:4px 0;font-size:1rem}
.note{font-size:.88rem;color:var(--muted)}

/* faq */
.faq details{background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:14px 18px;margin-bottom:12px;box-shadow:0 1px 3px rgba(31,27,20,.05)}
.faq summary{font-family:var(--serif);font-weight:700;cursor:pointer;color:var(--green-dark);font-size:1.05rem}
.faq details p{margin:10px 0 2px;color:var(--ink-soft)}

/* footer — dark colophon */
footer{background:var(--green-dark);color:#E9E2CC;margin-top:38px;padding:26px 0 32px;
  font-size:.92rem;border-top:4px solid var(--gold)}
footer a{color:var(--gold)}
footer .fnav{display:flex;flex-wrap:wrap;gap:8px 18px;margin-bottom:12px}
footer p{margin:4px 0;color:#B7AE8F}

/* iOS install sheet */
.sheet{position:fixed;inset:0;background:rgba(31,27,20,.55);display:none;z-index:99;align-items:flex-end}
.sheet.open{display:flex}
.sheet .box{background:#FFFDF6;width:100%;border-radius:18px 18px 0 0;padding:22px 22px 30px;color:var(--ink)}
.sheet h3{margin:0 0 8px;color:var(--green-dark)}
.sheet ol{margin:8px 0;padding-inline-start:22px}
.sheet .close{margin-top:14px;width:100%;background:var(--green);color:#FBF5E9;border:0;border-radius:10px;
  padding:13px;font-weight:700;font-size:1rem;cursor:pointer;font-family:var(--sans)}
.page-title{font-family:var(--serif);font-size:1.9rem;margin:22px 0 4px;color:var(--ink);line-height:1.3}
.page-sub{color:var(--muted);margin:0 0 8px;font-size:1.02rem}

/* segmented chips — provider tabs, preset amounts, channel picker (cash-out calc) */
.chiprow{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 4px}
.chipbtn{border:1.5px solid var(--line-dark);background:#FFFDF8;color:var(--ink);border-radius:999px;
  padding:9px 16px;font:inherit;font-size:.95rem;cursor:pointer}
.chipbtn.on{background:var(--green);border-color:var(--green);color:#FBF5E9;font-weight:700}
.chipbtn:active{transform:scale(.97)}
.chiprow a.chipbtn{display:inline-block}

/* prepaid meter codes — big tappable code figures in rate tables */
table.rates td.code{font-family:var(--serif);font-size:1.3rem;font-weight:700;
  color:var(--ink);white-space:nowrap;font-variant-numeric:tabular-nums}