:root{--ink:#1d2430;--muted:#5a6475;--line:#dde3ea;--bg:#fff;--soft:#f5f7f9;--brand:#b4451f;--brand-d:#8f3516;--ok:#1f6f43;--warn:#9a5b00;--radius:10px}
[hidden]{display:none!important}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--brand-d)}
a:hover{color:var(--brand)}
img,svg{max-width:100%}
.wrap{max-width:780px;margin:0 auto;padding:0 18px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:6px 10px;z-index:10}
header.site{border-bottom:1px solid var(--line);background:#fff}
header.site .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:6px 18px;padding-top:10px;padding-bottom:10px}
.logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:19px;color:var(--ink);text-decoration:none}
.logo svg{width:28px;height:28px}
nav.main{display:flex;flex-wrap:wrap;gap:2px 14px;font-size:15px}
nav.main a{color:var(--muted);text-decoration:none;padding:4px 0}
nav.main a:hover,nav.main a[aria-current]{color:var(--brand-d)}
main{padding:22px 0 10px}
h1{font-size:28px;line-height:1.25;margin:4px 0 10px}
h2{font-size:22px;line-height:1.3;margin:34px 0 10px}
h3{font-size:18px;margin:24px 0 6px}
.lede{font-size:18px;color:#333c4a;margin-top:0}
.crumbs{font-size:14px;color:var(--muted)}
.crumbs a{color:var(--muted)}
.calc{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:18px 0 8px}
.calc fieldset{border:0;margin:0;padding:0}
.calc legend{font-weight:700;margin-bottom:6px}
.row{display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:560px){.row.two{grid-template-columns:1fr 1fr}.row.three{grid-template-columns:1fr 1fr 1fr}}
label,.lbl{display:block;font-size:15px;font-weight:600;margin-bottom:4px}
.hint{display:block;font-weight:400;color:var(--muted);font-size:13px;margin-top:3px}
input[type=number],input[type=date],input[type=text],select{width:100%;font:inherit;font-size:17px;padding:9px 10px;border:1px solid #b9c3cf;border-radius:8px;background:#fff;color:var(--ink)}
input:focus,select:focus{outline:2px solid #f0a27f;border-color:var(--brand)}
.seg{display:flex;flex-wrap:wrap;gap:6px;margin:4px 0 12px}
.seg label{font-weight:500;display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid #b9c3cf;border-radius:999px;padding:6px 12px;margin:0;cursor:pointer}
.seg input{margin:0}
.out{margin-top:16px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:8px;padding:12px 14px}
.out .big{font-size:26px;font-weight:700;line-height:1.2}
.out p{margin:6px 0}
.out table{margin:6px 0}
.note{font-size:14px;color:var(--muted)}
.flag-ok{color:var(--ok);font-weight:600}.flag-warn{color:var(--warn);font-weight:600}
.formula{background:#fbfbf8;border:1px dashed #cfd5dc;border-radius:8px;padding:10px 12px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;overflow-x:auto;white-space:pre-wrap}
table{border-collapse:collapse;width:100%;font-size:15px}
th,td{border-bottom:1px solid var(--line);padding:6px 8px;text-align:left;vertical-align:top}
th{background:var(--soft)}
td.n,th.n{text-align:right;font-variant-numeric:tabular-nums}
.tablewrap{overflow-x:auto;margin:10px 0}
.charts details{border:1px solid var(--line);border-radius:8px;margin:8px 0;padding:6px 12px}
.charts summary{cursor:pointer;font-weight:600}
.chartgrid{columns:2;column-gap:20px}
@media(min-width:560px){.chartgrid{columns:3}}
.chartgrid table{break-inside:avoid;margin-bottom:12px}
.faq h3{margin-top:18px}
.related{border-top:1px solid var(--line);margin-top:34px;padding-top:6px}
.related ul{padding-left:20px}
.sources{font-size:14px}
.sources li{margin:4px 0}
.cards{list-style:none;padding:0;display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:600px){.cards{grid-template-columns:1fr 1fr}}
.cards li{border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.cards a{font-weight:700;font-size:18px;text-decoration:none}
.cards p{margin:6px 0 0;color:#3d4655;font-size:15px}
footer.site{border-top:1px solid var(--line);margin-top:40px;padding:20px 0 30px;font-size:14px;color:var(--muted);background:var(--soft)}
footer.site a{color:var(--muted)}
footer.site nav{display:flex;flex-wrap:wrap;gap:6px 16px;margin-bottom:8px}
.updated{font-size:13px;color:var(--muted)}
@media print{header.site,footer.site,.calc,.related,nav{display:none}.charts details{border:0}}
.btn{margin-top:14px;font:inherit;font-weight:600;font-size:16px;background:var(--brand);color:#fff;border:0;border-radius:8px;padding:9px 18px;cursor:pointer}
.btn:hover{background:var(--brand-d)}