:root{
  --ink:#17222b; --muted:#54626e; --bg:#f7f5f0; --card:#ffffff;
  --brand:#0d5c46; --brand-dark:#08402f; --accent:#e8a33d; --accent-ink:#7a4d0d;
  --line:#e0dacb; --radius:12px;
  --shadow:0 1px 2px rgba(23,34,43,.05),0 10px 28px rgba(23,34,43,.07);
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.55;font-size:16px;display:flex;flex-direction:column;min-height:100vh}
main{flex:1}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.skip{position:absolute;left:-9999px;top:0;background:var(--brand-dark);color:#fff;padding:.6rem 1rem;z-index:50;border-radius:0 0 10px 0}
.skip:focus{left:0}
header.site{background:var(--brand-dark);color:#fff;position:sticky;top:0;z-index:40;box-shadow:0 1px 6px rgba(8,64,47,.3)}
header.site .wrap{display:flex;align-items:center;gap:1.1rem;padding:.55rem 1rem;flex-wrap:wrap}
.logo{font-weight:800;font-size:1.22rem;color:#fff;letter-spacing:.2px;display:flex;align-items:center;gap:.5rem}
.logo:hover{text-decoration:none}
.logo span{color:var(--accent)}
.logo .mark{flex:none;display:block}
nav.main{margin-left:auto}
nav.main a{color:#dcebe5;margin-left:1rem;font-size:.93rem}
.wrap{max-width:1200px;margin:0 auto;padding:0 1.25rem}
main{padding:1.4rem 0 3rem}
h1{font-size:clamp(1.75rem,5vw,2.4rem);line-height:1.15;margin:.4rem 0 .7rem;letter-spacing:-.01em}
h2{font-size:1.35rem;line-height:1.25;margin:2.1rem 0 .6rem}
h3{font-size:1.05rem;margin:1.2rem 0 .4rem}
p{margin:.5rem 0}
.lede{font-size:1.12rem;color:var(--muted);max-width:66ch}
.crumbs{font-size:.85rem;color:var(--muted);margin-top:.4rem}
.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{box-shadow:var(--shadow)}
.tool label{display:block;font-size:.92rem;font-weight:600;margin:.75rem 0 .25rem}
.tool input,.tool select{width:100%;padding:.75rem;border:1px solid var(--line);border-radius:9px;font-size:1rem;background:#fff;min-height:50px;font-variant-numeric:tabular-nums}
.tool input:focus{outline:2px solid var(--brand);outline-offset:1px;border-color:var(--brand)}
.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:1.05rem;font-weight:700;cursor:pointer;margin-top:1.1rem;width:100%;min-height:54px}
button.calc:hover{background:var(--brand-dark)}
.result{display:none;background:#edf6f1;border:1px solid var(--brand);border-radius:var(--radius);padding:1.1rem 1.2rem;margin-top:1.1rem}
.result.show{display:block}
.result .big{font-size:2rem;line-height:1.15;font-weight:800;color:var(--brand-dark);font-variant-numeric:tabular-nums;margin:.1rem 0 .4rem}
.copybtn{margin-top:.7rem;background:#fff;border:1px solid var(--brand);color:var(--brand);border-radius:9px;padding:.55rem 1rem;font-size:.92rem;font-weight:700;cursor:pointer;min-height:44px}
.copybtn:hover{background:var(--brand);color:#fff}
@media(min-width:1024px){
  .tool{display:grid;grid-template-columns:1.08fr .92fr;column-gap:1.6rem}
  .tool .grid2{grid-column:1}
  .tool button.calc{grid-column:1}
  .tool .result{grid-column:2;grid-row:1/4;align-self:start;position:sticky;top:84px;margin-top:.75rem}
}
.stickybar{position:fixed;left:0;right:0;bottom:0;z-index:35;background:var(--brand-dark);color:#fff;font-weight:800;font-size:1.02rem;padding:.75rem 1rem;display:flex;justify-content:space-between;gap:1rem;transform:translateY(110%);transition:transform .25s ease;font-variant-numeric:tabular-nums}
body.has-result .stickybar{transform:none}
@media(min-width:1024px){.stickybar{display:none}}
@media(max-width:1023px){body.has-result{padding-bottom:58px}}
.quick{background:#fdf6e7;border:1px solid var(--accent);border-left:6px solid var(--accent);border-radius:10px;padding:.9rem 1.1rem;margin:1rem 0}
.quick p{margin:.2rem 0}
.quick .q-label{font-size:.78rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--accent-ink)}
table{border-collapse:collapse;width:100%;margin:.8rem 0}
th,td{border:1px solid var(--line);padding:.55rem .65rem;text-align:left;font-size:.95rem;vertical-align:top}
th{background:#f0ece1}
tbody tr:nth-child(even) td{background:#fbf9f4}
details{border:1px solid var(--line);border-radius:10px;background:var(--card);padding:.7rem 1rem;margin:.5rem 0}
summary{font-weight:650;cursor:pointer;padding:.35rem 0;min-height:44px;display:flex;align-items:center;justify-content:space-between;gap:1rem;list-style:none}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:1.35rem;font-weight:800;color:var(--brand);flex:none;line-height:1}
details[open ] summary::after{content:"\2212"}
.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:.85rem 2rem .85rem .85rem;font-weight:600;position:relative}
.hublist a{display:block;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:.95rem 2.2rem .95rem 1.05rem;margin:.55rem 0;font-weight:600;position:relative}
.hublist a::after,.relgrid a::after{content:"\2192";position:absolute;right:1rem;top:50%;transform:translateY(-50%);color:var(--brand);font-weight:800}
.chips-label{font-weight:700;color:var(--muted);font-size:.9rem;margin:.2rem 0 .1rem}
.hublist small{display:block;color:var(--muted);font-weight:400;margin-top:.15rem}
@media(hover:hover){.hublist a:hover,.relgrid a:hover{border-color:var(--brand);box-shadow:var(--shadow);text-decoration:none;transform:translateY(-1px)}}
.searchbox{display:flex;gap:.5rem;margin:1.1rem 0 .6rem;max-width:640px}
.searchbox input{flex:1;height:56px;font-size:1.05rem;padding:0 1rem;border:1px solid var(--line);border-radius:12px;background:#fff;min-width:0}
.searchbox input:focus{outline:2px solid var(--brand);outline-offset:1px;border-color:var(--brand)}
.chips{display:flex;flex-wrap:wrap;gap:.5rem;margin:.4rem 0 1rem}
.chips a{background:#fff;border:1px solid var(--line);border-radius:999px;padding:.5rem .95rem;font-weight:600;font-size:.93rem;min-height:44px;display:inline-flex;align-items:center}
.chips a:hover{border-color:var(--brand);text-decoration:none}
footer.site{border-top:1px solid var(--line);padding:1.6rem 0 2rem;color:var(--muted);font-size:.9rem}
.footnav{margin-bottom:.7rem}
.footnav a{font-weight:600}
.note{font-size:.88rem;color:var(--muted)}
@media print{header.site,footer.site,.stickybar,button.calc,.copybtn,.searchbox{display:none}}