:root{
  --bg:#f6f3ec;
  --paper:#fffdf8;
  --ink:#1d2a24;
  --muted:#5b6862;
  --line:#ded8ca;
  --accent:#1f5c45;
  --accent-soft:#e3ede6;
  --result:#123d2e;
  --warn:#8a5a12;
  --radius:14px;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 var(--sans)}
a{color:var(--accent)}
a:hover{text-decoration-thickness:2px}
img,svg{max-width:100%}
.wrap{max-width:860px;margin:0 auto;padding:0 18px}

/* header */
.site-head{border-bottom:1px solid var(--line);background:var(--paper)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-family:var(--serif);font-size:1.3rem;font-weight:700;letter-spacing:-.01em}
.logo-mark{width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;font:700 .95rem/1 var(--sans)}
.logo span.tld{color:var(--muted);font-weight:400}
.nav{display:flex;gap:16px;font-size:.95rem}
.nav a{color:var(--muted);text-decoration:none}
.nav a:hover{color:var(--accent)}

/* hero */
.hero{padding:44px 0 18px}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;color:var(--accent);font-weight:700;margin:0 0 8px}
h1,h2,h3{font-family:var(--serif);line-height:1.2;letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,4.5vw,2.6rem);margin:0 0 12px}
h2{font-size:1.45rem;margin:2.2em 0 .5em}
h3{font-size:1.12rem;margin:1.5em 0 .3em}
.lead{font-size:1.1rem;color:var(--muted);margin:0 0 8px;max-width:640px}
.updated{font-size:.85rem;color:var(--muted)}

/* calculator card */
.calc{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:22px 0 10px;box-shadow:0 1px 0 rgba(0,0,0,.03),0 8px 24px -16px rgba(30,50,40,.25)}
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px 20px}
.field label{display:block;font-weight:600;font-size:.95rem;margin-bottom:6px}
.field .hint{display:block;font-weight:400;color:var(--muted);font-size:.83rem;margin-top:4px}
.input{display:flex;align-items:center;border:1.5px solid var(--line);border-radius:10px;background:#fff;overflow:hidden}
.input:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.input input,.input select{flex:1;min-width:0;border:0;padding:11px 12px;font:inherit;background:transparent;color:var(--ink)}
.input input:focus,.input select:focus{outline:none}
.input .unit{padding:0 12px;color:var(--muted);font-size:.9rem;white-space:nowrap}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.95rem;padding-top:4px}
.check input{width:18px;height:18px;margin-top:3px;accent-color:var(--accent)}

.result{margin-top:22px;border-radius:12px;background:var(--accent-soft);padding:18px 20px}
.result-main{font-family:var(--serif);font-size:clamp(1.7rem,5vw,2.3rem);color:var(--result);font-weight:700;line-height:1.15}
.result-label{font-size:.9rem;color:var(--muted);margin-bottom:4px}
.result-rows{margin:14px 0 0;padding:0;list-style:none;font-size:.95rem}
.result-rows li{display:flex;justify-content:space-between;gap:12px;padding:6px 0;border-top:1px dashed rgba(31,92,69,.25)}
.result-rows li b{font-variant-numeric:tabular-nums;white-space:nowrap}
.result-note{font-size:.85rem;color:var(--muted);margin:12px 0 0}

/* content */
.content{max-width:700px}
.content p,.content li{max-width:68ch}
.content table{border-collapse:collapse;width:100%;font-size:.95rem;margin:12px 0;background:var(--paper)}
.content th,.content td{border:1px solid var(--line);padding:8px 10px;text-align:left}
.content th{background:var(--accent-soft)}
.content td.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.tablewrap{overflow-x:auto}
.faq details{border-top:1px solid var(--line);padding:12px 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:600}
.faq details p{margin:.6em 0 0}
.sources{font-size:.9rem;color:var(--muted)}
.disclaimer{font-size:.88rem;color:var(--muted);border-left:3px solid var(--line);padding-left:12px;margin:24px 0}

.partner{border:1px solid var(--line);border-radius:12px;background:var(--paper);padding:16px 18px;margin:26px 0}
.partner .tag{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.partner p{margin:.3em 0}

/* cards on front page + related */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin:18px 0 8px}
.card{display:block;text-decoration:none;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:18px;transition:transform .12s ease,border-color .12s ease}
.card:hover{transform:translateY(-2px);border-color:var(--accent)}
.card h3{margin:0 0 6px;font-size:1.1rem}
.card p{margin:0;color:var(--muted);font-size:.93rem}
.card .badge{display:inline-block;font-size:.72rem;font-weight:700;color:var(--accent);background:var(--accent-soft);border-radius:999px;padding:2px 9px;margin-bottom:8px}

.site-foot{margin-top:56px;border-top:1px solid var(--line);background:var(--paper);font-size:.9rem;color:var(--muted)}
.site-foot .wrap{padding-top:26px;padding-bottom:30px}
.foot-links{display:flex;flex-wrap:wrap;gap:8px 18px;margin-bottom:10px}
.foot-links a{color:var(--muted)}

@media (max-width:560px){
  body{font-size:16px}
  .calc{padding:16px}
  .nav{gap:12px;font-size:.9rem}
  .hero{padding-top:28px}
}