:root{--ink:#1d2430;--muted:#5b6575;--line:#d9dee6;--bg:#fff;--soft:#f4f6f9;--brand:#0b5d4b;--brand2:#0e7a62;--warn:#8a4b00;--warnbg:#fff6e5;--bad:#a32020;--ok:#0b6b3a;--max:1060px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--brand)}a:hover{color:var(--brand2)}
img,svg{max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:9}
header.site{border-bottom:1px solid var(--line);background:#fff}
.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:58px}
.logo{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--ink);text-decoration:none;font-size:1.05rem}
.logo svg{width:28px;height:28px}
nav.main ul{list-style:none;margin:0;padding:0;display:flex;gap:18px;flex-wrap:wrap}
nav.main a{text-decoration:none;color:var(--ink);font-weight:500}
nav.main a[aria-current=page]{color:var(--brand);text-decoration:underline}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:6px 10px;font:inherit}
@media(max-width:760px){.menu-btn{display:block}nav.main{display:none;width:100%}nav.main.open{display:block}nav.main ul{flex-direction:column;gap:0;padding:6px 0 12px}nav.main li a{display:block;padding:9px 0;border-top:1px solid var(--soft)}.bar{flex-wrap:wrap}}
.crumbs{font-size:.88rem;color:var(--muted);margin:14px 0 0}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li:before{content:"›";margin-right:6px;color:var(--muted)}
main{padding-bottom:40px}
h1{font-size:1.85rem;line-height:1.25;margin:18px 0 10px}
h2{font-size:1.35rem;line-height:1.3;margin:30px 0 10px}
h3{font-size:1.1rem;margin:22px 0 8px}
.lede{font-size:1.1rem;color:#334}
.muted{color:var(--muted)}.small{font-size:.9rem}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.card{border:1px solid var(--line);border-radius:10px;padding:16px;background:#fff}
.card h2,.card h3{margin-top:0;font-size:1.08rem}
.card a.go{font-weight:600}
.hero{background:var(--soft);border-bottom:1px solid var(--line);padding:8px 0 22px}
.calc{border:1px solid var(--line);border-radius:12px;padding:16px;background:var(--soft);margin:18px 0}
.calc form{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.calc .full{grid-column:1/-1}
label{display:block;font-weight:600;font-size:.93rem;margin-bottom:4px}
.hint{display:block;font-weight:400;color:var(--muted);font-size:.83rem}
input[type=number],input[type=text],select{width:100%;padding:10px;border:1px solid #b9c2cf;border-radius:8px;font:inherit;background:#fff}
input:focus,select:focus,button:focus{outline:3px solid #9fd3c4;outline-offset:1px}
.check{display:flex;gap:8px;align-items:flex-start;font-weight:500}
.check input{margin-top:5px;width:18px;height:18px}
button.run{background:var(--brand);color:#fff;border:0;border-radius:8px;padding:12px 18px;font:inherit;font-weight:700;cursor:pointer}
button.run:hover{background:var(--brand2)}
button.ghost{background:#fff;border:1px solid var(--line);border-radius:8px;padding:8px 12px;font:inherit;cursor:pointer}
.result{margin-top:14px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px}
.result[hidden]{display:none}
.big{font-size:1.6rem;font-weight:800;color:var(--brand)}
.err{color:var(--bad);font-weight:600}
.ok{color:var(--ok);font-weight:700}.no{color:var(--bad);font-weight:700}
table{border-collapse:collapse;width:100%;font-size:.93rem}
th,td{border-bottom:1px solid var(--line);padding:7px 6px;text-align:left;vertical-align:top}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.note{background:var(--warnbg);border-left:4px solid #e0a030;padding:10px 12px;border-radius:6px;margin:14px 0}
.formula{background:#fff;border:1px solid var(--line);border-radius:8px;padding:12px;overflow-x:auto}
.formula code,code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em}
.sources li{margin-bottom:6px}
.checked{font-size:.88rem;color:var(--muted)}
details{border:1px solid var(--line);border-radius:8px;padding:8px 12px;margin:10px 0;background:#fff}
summary{cursor:pointer;font-weight:600}
.partner-cta[hidden]{display:none!important}
footer.site{border-top:1px solid var(--line);background:var(--soft);padding:22px 0;font-size:.9rem;color:var(--muted)}
footer.site ul{list-style:none;padding:0;margin:0 0 10px;display:flex;flex-wrap:wrap;gap:14px}
@media print{header.site,footer.site,.calc form,.crumbs{display:none}}