:root{
  --ink:#12212e; --muted:#5b6b78; --line:#dde5ea; --bg:#f6f8f9; --card:#ffffff;
  --brand:#0b6e5d; --brand-dark:#084f43; --accent:#e8f4f1; --warn:#fdf3e3;
  --radius:12px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.55;font-size:16px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1060px;margin:0 auto;padding:0 18px}
header.site{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:58px}
.logo{font-weight:800;font-size:21px;color:var(--ink);letter-spacing:-.02em}
.logo span{color:var(--brand)}
nav.main a{margin-left:18px;color:var(--ink);font-size:15px}
.crumbs{font-size:13px;color:var(--muted);margin:18px 0 4px}
.crumbs a{color:var(--muted)}
h1{font-size:31px;line-height:1.2;margin:6px 0 8px;letter-spacing:-.01em}
h2{font-size:22px;margin:30px 0 10px}
h3{font-size:17px;margin:20px 0 6px}
.lede{color:var(--muted);font-size:17px;max-width:720px}
.badge{display:inline-block;background:var(--accent);color:var(--brand-dark);border:1px solid #bfe0d6;
  font-size:12.5px;font-weight:600;padding:3px 10px;border-radius:999px;margin-bottom:8px}
.calc-shell{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:20px 0 8px}
@media(max-width:820px){.calc-shell{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.card h2,.card h3{margin-top:0}
label{display:block;font-size:13.5px;font-weight:600;margin:14px 0 5px}
label:first-child{margin-top:0}
input[type=text],input[type=number],select{width:100%;padding:11px 12px;font-size:16px;border:1px solid #c3ced4;
  border-radius:8px;background:#fff;color:var(--ink)}
input:focus,select:focus{outline:2px solid var(--brand);outline-offset:0;border-color:var(--brand)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.check{display:flex;align-items:center;gap:8px;font-weight:500;font-size:15px;margin-top:14px}
.check input{width:18px;height:18px;accent-color:var(--brand)}
.hint{font-size:13px;color:var(--muted);margin-top:4px}
.result-big{font-size:37px;font-weight:800;letter-spacing:-.02em;color:var(--brand-dark);line-height:1.1}
.result-label{font-size:13.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;font-weight:700}
table.break{width:100%;border-collapse:collapse;margin-top:14px;font-size:15px}
table.break td,table.break th{padding:7px 4px;border-bottom:1px solid var(--line);text-align:right}
table.break td:first-child,table.break th:first-child{text-align:left}
table.break tr.total td{font-weight:800;border-top:2px solid var(--ink);border-bottom:none}
table.rates{width:100%;border-collapse:collapse;font-size:15px;margin:10px 0}
table.rates td,table.rates th{padding:7px 10px;border:1px solid var(--line);text-align:left}
table.rates th{background:var(--accent)}
.note{background:var(--warn);border:1px solid #ecd9ae;border-radius:8px;padding:12px 14px;font-size:14.5px;margin:14px 0}
.source{font-size:13.5px;color:var(--muted)}
details.faq{border:1px solid var(--line);border-radius:8px;background:#fff;margin:8px 0;padding:0 14px}
details.faq summary{cursor:pointer;font-weight:600;padding:12px 0}
details.faq p{margin:0 0 12px}
.grid-links{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;margin:14px 0}
.grid-links a{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px;color:var(--ink)}
.grid-links a b{display:block;font-size:16px;color:var(--brand-dark)}
.grid-links a:hover{border-color:var(--brand);text-decoration:none}
button.share{margin-top:14px;background:var(--brand);color:#fff;border:0;border-radius:8px;
  padding:10px 16px;font-size:14.5px;font-weight:600;cursor:pointer}
button.share:hover{background:var(--brand-dark)}
.code-chip{display:inline-block;background:var(--brand);color:#fff;font-weight:800;border-radius:8px;
  padding:4px 14px;font-size:22px;vertical-align:middle}
footer.site{border-top:1px solid var(--line);background:#fff;margin-top:44px;padding:26px 0 34px;font-size:14px;color:var(--muted)}
footer.site .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:18px}
footer.site a{color:var(--ink);display:block;margin:4px 0}
.disclaimer{font-size:12.5px;color:var(--muted);margin-top:18px;max-width:820px}
main{padding-bottom:10px}
section.content{max-width:820px}
/* ---------- Mobile (<=640px) ---------- */
@media(max-width:640px){
  header.site .wrap{height:auto;flex-wrap:wrap;padding-top:9px;padding-bottom:9px}
  .logo{font-size:19px}
  nav.main{display:flex;flex-wrap:wrap;align-items:center}
  nav.main a{margin-left:12px;font-size:13.5px;padding:4px 0}
  nav.main a:first-child{margin-left:0}
  h1{font-size:26px}
  h2{font-size:20px}
  .lede{font-size:16px}
  .card{padding:16px}
  .row2{grid-template-columns:1fr}
  .result-big{font-size:31px}
  table.break{font-size:13.5px}
  table.rates{font-size:13.5px}
  table.rates td,table.rates th{padding:6px 6px}
  .code-chip{font-size:19px}
}