:root{--ink:#14213d;--muted:#5b6475;--line:#e3e7ee;--bg:#f7f8fb;--card:#fff;--acc:#0b6e4f;--acc-2:#e7f5ef;--warn:#b45309;--warn-bg:#fff7e6;--bad:#b42318;--bad-bg:#fdecea;--radius:14px;
--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px}
a{color:var(--acc)}a:hover{text-decoration-thickness:2px}
.wrap{max-width:1120px;margin:0 auto;padding:0 16px}
header.site{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
header.site .wrap{display:flex;align-items:center;gap:20px;min-height:60px;flex-wrap:wrap}
.logo{font-weight:800;font-size:20px;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:8px;letter-spacing:-.3px}
.logo b{color:var(--acc)}
nav.top{display:flex;gap:16px;flex-wrap:wrap;font-size:15px}nav.top a{color:var(--muted);text-decoration:none}nav.top a:hover{color:var(--acc)}
.crumbs{font-size:14px;color:var(--muted);margin:18px 0 0}.crumbs a{color:var(--muted)}
h1{font-size:clamp(28px,4.2vw,40px);line-height:1.15;letter-spacing:-.6px;margin:10px 0 10px}
h2{font-size:24px;letter-spacing:-.3px;margin:40px 0 10px}h3{font-size:19px;margin:24px 0 6px}
.lead{font-size:19px;color:var(--muted);max-width:760px;margin:0 0 22px}
.updated{display:inline-block;font-size:13px;background:var(--acc-2);color:var(--acc);padding:3px 10px;border-radius:99px;font-weight:600}
.calc-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:22px;align-items:start;margin:18px 0 8px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 1px 2px rgba(20,33,61,.04)}
.card h2{margin:0 0 14px;font-size:18px}
form .f{margin:0 0 14px}form label{display:block;font-weight:600;font-size:15px;margin:0 0 5px}
.in{display:flex;align-items:center;border:1px solid #cfd6e2;border-radius:10px;background:#fff;overflow:hidden}
.in:focus-within{border-color:var(--acc);box-shadow:0 0 0 3px var(--acc-2)}
.in input,.in select{flex:1;border:0;padding:11px 12px;font:inherit;font-size:17px;min-width:0;background:transparent;color:var(--ink)}
.in input:focus,.in select:focus{outline:none}
.in .u{padding:0 12px;color:var(--muted);font-size:15px;white-space:nowrap}
.help{font-size:13.5px;color:var(--muted);margin:4px 0 0}
.chk{display:flex;gap:10px;align-items:flex-start;font-weight:500!important;cursor:pointer}.chk input{margin-top:5px;width:18px;height:18px;accent-color:var(--acc)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
#results{position:sticky;top:76px}
.main-res{background:var(--acc);color:#fff;border-radius:12px;padding:18px 20px;margin:0 0 14px}
.main-res span{display:block;font-size:15px;opacity:.9}.main-res strong{display:block;font-size:clamp(30px,5vw,40px);letter-spacing:-.8px;line-height:1.2}
.main-res em{display:block;font-style:normal;font-size:15px;opacity:.9;margin-top:2px}
table.res{width:100%;border-collapse:collapse;font-size:16px}
table.res td{padding:9px 2px;border-bottom:1px solid var(--line)}table.res td:last-child{text-align:right;font-weight:600;font-variant-numeric:tabular-nums;white-space:nowrap}
table.res tr.tot td{font-weight:800;border-bottom:2px solid var(--ink)}table.res tr.minus td:last-child{color:var(--bad)}table.res tr.plus td:last-child{color:var(--acc)}
table.res tr.sub td{color:var(--muted);font-size:14.5px}
.alert{padding:10px 12px;border-radius:10px;font-size:15px;background:var(--acc-2);color:var(--acc);margin:0 0 12px}
.alert.warn{background:var(--warn-bg);color:var(--warn)}.alert.bad{background:var(--bad-bg);color:var(--bad)}
.res-note{font-size:13.5px;color:var(--muted);margin:12px 0 0}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.btn{display:inline-block;border:1px solid var(--acc);color:var(--acc);background:#fff;padding:9px 14px;border-radius:10px;font:inherit;font-size:15px;font-weight:600;cursor:pointer;text-decoration:none}
.btn.solid{background:var(--acc);color:#fff}.btn:hover{filter:brightness(.95)}
.chart{margin:18px 0 0}.chart figcaption{font-weight:700;font-size:15px;margin-bottom:6px}.chart svg{width:100%;height:auto;display:block}
.chart text{font-size:11px;fill:var(--muted)}.legend{display:flex;gap:14px;font-size:13px;color:var(--muted);margin-top:4px}
.legend i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:5px}
.tbl-wrap{overflow-x:auto;margin-top:16px;max-height:340px;overflow-y:auto;border:1px solid var(--line);border-radius:10px}
table.data{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums}
table.data th{position:sticky;top:0;background:#f1f4f8;text-align:right;padding:8px 10px;font-weight:700}table.data th:first-child,table.data td:first-child{text-align:left}
table.data td{text-align:right;padding:7px 10px;border-top:1px solid var(--line);white-space:nowrap}
article.content{max-width:780px}article.content p,article.content li{color:#2b3550}
.formula{background:#f1f4f8;border-radius:10px;padding:12px 14px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:15px;overflow-x:auto}
table.ref{border-collapse:collapse;width:100%;font-size:15px;margin:10px 0}table.ref th,table.ref td{border:1px solid var(--line);padding:8px 10px;text-align:left}table.ref th{background:#f1f4f8}
details{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:0 0 10px}
details summary{font-weight:700;cursor:pointer}details[open] summary{margin-bottom:6px}
.kit{display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap;background:linear-gradient(135deg,#0b6e4f,#14213d);color:#fff;border-radius:var(--radius);padding:22px;margin:34px 0}
.kit p{margin:4px 0 0;opacity:.9}.kit .btn{background:#fff;color:var(--ink);border:0}
.aff{border:1px dashed #cfd6e2;border-radius:12px;padding:14px 16px;font-size:15px;margin:22px 0;background:#fff}
.disclaimer{font-size:13.5px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px;margin-top:30px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin:14px 0}
.tile{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-decoration:none;color:var(--ink);transition:transform .12s,box-shadow .12s}
.tile:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(20,33,61,.08)}.tile strong{display:block;font-size:17px;margin-bottom:4px}.tile span{color:var(--muted);font-size:14.5px}
.hero{padding:34px 0 8px}.hero h1{font-size:clamp(32px,5vw,48px)}
footer.site{margin-top:60px;background:var(--ink);color:#c8d0df;font-size:14.5px}footer.site .wrap{padding:30px 16px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}
footer.site a{color:#fff;text-decoration:none}footer.site a:hover{text-decoration:underline}footer.site ul{list-style:none;padding:0;margin:0}footer.site li{margin:4px 0}
@media (max-width:860px){.calc-grid{grid-template-columns:1fr}#results{position:static}footer.site .wrap{grid-template-columns:1fr}}
@media (max-width:480px){.row2{grid-template-columns:1fr}.card{padding:16px}body{font-size:16px}}
.row2>*{min-width:0}
@media (max-width:860px){header.site{position:static}header.site .wrap{gap:4px 16px;padding-top:8px;padding-bottom:8px}
nav.top{flex-wrap:nowrap;overflow-x:auto;width:100%;gap:14px;font-size:14px;padding-bottom:2px;scrollbar-width:none}nav.top a{white-space:nowrap}}