:root{
  --ink:#14202b; --muted:#5a6a77; --bg:#f6f4ef; --card:#ffffff;
  --brand:#0d5c46; --brand-dark:#094434; --accent:#e8a33d; --line:#ddd8cc;
  --radius:14px;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.55}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
header.site{background:var(--brand-dark);color:#fff}
header.site .wrap{display:flex;align-items:center;gap:1.2rem;padding:.8rem 1rem}
.logo{font-weight:800;font-size:1.35rem;color:#fff;letter-spacing:.2px}
.logo span{color:var(--accent)}
nav.main a{color:#dcebe5;margin-right:1rem;font-size:.95rem}
.wrap{max-width:980px;margin:0 auto;padding:0 1rem}
main{padding:1.5rem 0 3rem}
h1{font-size:2rem;line-height:1.2;margin:.4rem 0 .8rem}
h2{font-size:1.35rem;margin:2rem 0 .6rem}
h3{font-size:1.05rem;margin:1.2rem 0 .4rem}
p{margin:.5rem 0}
.lede{font-size:1.1rem;color:var(--muted)}
.crumbs{font-size:.85rem;color:var(--muted);margin-top:1rem}
.crumbs a{color:var(--muted)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem;margin:1rem 0}
.tool label{display:block;font-size:.9rem;font-weight:600;margin:.7rem 0 .25rem}
.tool input,.tool select{width:100%;padding:.6rem;border:1px solid var(--line);border-radius:9px;font-size:1rem;background:#fff}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:0 1rem}
@media(max-width:640px){.grid2{grid-template-columns:1fr}}
button.calc{background:var(--brand);color:#fff;border:0;border-radius:10px;padding:.8rem 1.4rem;font-size:1rem;font-weight:700;cursor:pointer;margin-top:1rem;width:100%}
button.calc:hover{background:var(--brand-dark)}
.result{display:none;background:#eef7f2;border:1px solid var(--brand);border-radius:var(--radius);padding:1.1rem;margin-top:1.1rem}
.result.show{display:block}
.result .big{font-size:1.5rem;font-weight:800}
table{border-collapse:collapse;width:100%;margin:.8rem 0}
th,td{border:1px solid var(--line);padding:.5rem .6rem;text-align:left;font-size:.95rem}
th{background:#f0ece1}
details{border:1px solid var(--line);border-radius:10px;background:var(--card);padding:.7rem 1rem;margin:.5rem 0}
summary{font-weight:650;cursor:pointer}
.relgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:.8rem;margin-top:.8rem}
.relgrid a{display:block;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:.8rem;font-weight:600}
.hublist a{display:block;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:.9rem 1rem;margin:.5rem 0;font-weight:600}
.hublist small{display:block;color:var(--muted);font-weight:400}
footer.site{border-top:1px solid var(--line);padding:1.5rem 0;color:var(--muted);font-size:.9rem}
.note{font-size:.88rem;color:var(--muted)}