:root{--bg:#f7f8f6;--fg:#2b2622;--muted:#6f655c;--card:#fff;--line:#e6ddd2;--accent:#2f6b4f;--accent-soft:#e3efe8}
*{box-sizing:border-box}
body{margin:0;font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--fg)}
a{color:var(--accent)}
header,main,footer{max-width:760px;margin:0 auto;padding:0 18px}
header{display:flex;justify-content:space-between;align-items:center;padding-top:14px;padding-bottom:14px;border-bottom:1px solid var(--line)}
header a{font-weight:700;text-decoration:none;color:var(--fg)}
h1{font-size:1.9rem;line-height:1.2;margin:26px 0 6px}
h2{font-size:1.25rem;margin:32px 0 8px}
.lede{color:var(--muted);margin:0 0 18px}
.calc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px 14px}
label{display:block;font-size:.92rem;font-weight:600}
input,select{width:100%;margin-top:4px;padding:10px 12px;font:inherit;border:1px solid var(--line);border-radius:8px;background:#fff}
input:focus,select:focus{outline:2px solid var(--accent);outline-offset:1px}
label.check{display:flex;gap:8px;align-items:center;font-weight:500}
label.check input{width:auto;margin:0}
.unitbar{display:flex;justify-content:flex-end;gap:8px;align-items:center;margin-bottom:12px;font-size:.9rem}
.unitbar select{width:auto;margin:0;padding:6px 8px}
#result{margin-top:16px}
dl{margin:0;border-top:1px solid var(--line)}
dl div{display:flex;justify-content:space-between;gap:16px;padding:9px 0;border-bottom:1px solid var(--line)}
dt{color:var(--muted)}dd{margin:0;font-weight:600;text-align:right}
dl div.hi{background:var(--accent-soft);margin:0 -18px;padding:12px 18px}
dl div.hi dd{color:var(--accent);font-size:1.1rem}
.hint{color:var(--muted)}
.ad{min-height:0;margin:20px 0}.ad-banner{display:flex;justify-content:center;min-height:250px}
.links{columns:2;padding-left:18px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;padding:0;list-style:none}
.cards a{display:block;height:100%;padding:14px;border:1px solid var(--line);border-radius:10px;background:#fff;text-decoration:none;color:var(--fg)}
.cards b{display:block;color:var(--accent)}
.cards span{font-size:.92rem;color:var(--muted)}
details{border-bottom:1px solid var(--line);padding:10px 0}
summary{cursor:pointer;font-weight:600}
footer{margin-top:40px;padding-top:16px;padding-bottom:30px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}
@media(max-width:520px){.links{columns:1}dl div{flex-direction:column;gap:2px}dd{text-align:left}}
table{border-collapse:collapse;width:100%;margin:8px 0}th,td{text-align:left;padding:6px 8px;border-bottom:1px solid var(--line)}h3{font-size:1.05rem;margin:20px 0 6px}
.grid label{display:flex;flex-direction:column;justify-content:space-between}