:root{
  --bg:#eef1ee; --card:#ffffff; --ink:#14201c; --muted:#4d5b55; --line:#d3dad5;
  --accent:#0b6b57; --accent-ink:#ffffff; --panel:#12201b; --panel-ink:#e9f2ec; --num:#b9f26a;
  --warn:#8a3b12; --box:#f7efd9; --box-line:#e2cf9b;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0e1512;--card:#161f1b;--ink:#e6eee9;--muted:#9fb0a8;--line:#2b3832;--accent:#4fc3a1;--accent-ink:#06231b;--panel:#0a110e;--panel-ink:#e9f2ec;--num:#b9f26a;--warn:#f0a070;--box:#262212;--box-line:#5a4d1f}
}
*{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);overflow-wrap:break-word}
a{color:var(--accent)}
.wrap{max-width:860px;margin:0 auto;padding:0 16px}
header.site{background:var(--card);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 16px;padding-top:12px;padding-bottom:12px}
.logo{font-family:var(--mono);font-weight:700;font-size:1.05rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em}
.logo span{color:var(--accent)}
nav.main{display:flex;flex-wrap:wrap;gap:2px 14px;font-size:.92rem}
nav.main a{color:var(--muted);text-decoration:none;padding:6px 0}
nav.main a:hover,nav.main a[aria-current]{color:var(--ink);text-decoration:underline}
main{padding:24px 0 40px}
h1{font-size:1.75rem;line-height:1.2;margin:0 0 6px;letter-spacing:-.02em}
h2{font-size:1.3rem;line-height:1.3;margin:36px 0 10px}
h3{font-size:1.05rem;margin:0 0 4px}
.lede{color:var(--muted);margin:0 0 18px}
.crumbs{font-size:.88rem;color:var(--muted);margin:0 0 10px}
.crumbs a{color:var(--muted)}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}
.grid{display:grid;gap:12px;grid-template-columns:1fr 1fr}
.field{display:flex;flex-direction:column;gap:4px;min-width:0;margin-bottom:12px}
.field.full{grid-column:1/-1}
label,legend{font-size:.9rem;font-weight:600}
input,select{font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:10px 12px;min-height:44px;width:100%;min-width:0}
input:focus-visible,select:focus-visible,button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
fieldset{border:0;margin:0 0 12px;padding:0}
.radios{display:flex;flex-wrap:wrap;gap:8px 18px}
.radios label,.check{font-weight:500;display:flex;align-items:center;gap:8px;min-height:36px}
.radios input,.check input{width:20px;min-height:20px;height:20px;accent-color:var(--accent)}
.addon{display:grid;grid-template-columns:1fr 110px;gap:8px;align-items:center;margin-bottom:8px}
.addon .check{margin:0}
.btn{font:inherit;font-weight:600;border-radius:8px;border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);padding:10px 16px;min-height:44px;cursor:pointer}
.btn.ghost{background:transparent;color:var(--accent)}
.btn:hover{filter:brightness(1.08)}
.btns{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.result{background:var(--panel);color:var(--panel-ink);border-radius:12px;padding:16px;margin-top:14px}
.result dl{margin:0;display:grid;gap:0}
.result .row{display:flex;align-items:baseline;gap:8px;padding:8px 0;border-bottom:1px dashed #ffffff30}
.result .row:last-child{border-bottom:0}
.result dt{font-size:.95rem;flex:1 1 auto;display:flex;align-items:baseline;gap:6px}
.result dt::after{content:"";flex:1;border-bottom:2px dotted #ffffff40;transform:translateY(-4px);min-width:10px}
.result dd{flex:0 0 auto}
.result dd{margin:0;font:700 1.35rem var(--mono);color:var(--num);font-variant-numeric:tabular-nums;text-align:right}
.msg{color:var(--warn);min-height:1.4em;margin:8px 0 0;font-size:.95rem}
.result .msg{color:#ffc9a3}
.note{font-size:.88rem;color:var(--muted);margin:10px 0 0}
.answer{font-size:1.08rem;border-left:4px solid var(--accent);padding:2px 0 2px 14px;margin:28px 0 0}
pre.formula,.formula{font:600 .95rem/1.6 var(--mono);background:var(--card);border:1px solid var(--line);border-radius:8px;padding:12px;white-space:pre-wrap;margin:8px 0}
.ex{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.ex p{margin:6px 0}
details{background:var(--card);border:1px solid var(--line);border-radius:8px;margin:8px 0;padding:0 14px}
summary{cursor:pointer;font-weight:600;padding:12px 0;min-height:44px}
details p{margin:0 0 12px}
.related ul{padding-left:18px;margin:6px 0}
.related li{margin:4px 0}
.affbox{background:var(--box);border:1px solid var(--box-line);border-radius:12px;padding:14px 16px;margin:32px 0 0}
.affbox h2{margin:0 0 6px;font-size:1.1rem}
.affbox ul{margin:6px 0;padding-left:18px}
.affbox p{margin:6px 0 0;font-size:.85rem;color:var(--muted)}
.cards{display:grid;gap:12px;grid-template-columns:1fr;margin-top:20px}
a.tool{display:block;text-decoration:none;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}
a.tool:hover{border-color:var(--accent)}
a.tool h2{margin:0 0 4px;font-size:1.15rem;color:var(--accent)}
a.tool p{margin:0 0 10px;color:var(--muted);font-size:.95rem}
.ledger{display:flex;align-items:baseline;gap:6px;font:.85rem var(--mono);color:var(--ink)}
.ledger i{flex:1;border-bottom:2px dotted var(--line);transform:translateY(-3px)}
.ledger b{color:var(--accent)}
.hero{padding:12px 0 4px}
.hero h1{font-size:2rem}
footer.site{border-top:1px solid var(--line);background:var(--card);padding:20px 0;font-size:.9rem;color:var(--muted)}
footer.site nav{display:flex;flex-wrap:wrap;gap:6px 16px;margin-bottom:8px}
footer.site a{color:var(--muted)}
.punch{display:grid;grid-template-columns:1fr 1fr auto;gap:10px;align-items:end;margin-bottom:6px}
.punch .btn{margin-bottom:12px}
.day{border:1px solid var(--line);border-radius:8px;padding:10px;margin-bottom:10px;background:var(--bg)}
.day .dn{font-weight:700;margin-bottom:6px;display:flex;justify-content:space-between;gap:8px}
.day .dn output{font:700 1rem var(--mono)}
.day .grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.day .field{margin-bottom:0}
.printhead{display:none}
@media (max-width:480px){
  .grid{grid-template-columns:1fr}
  .punch{grid-template-columns:1fr 1fr}
  .punch .btn{grid-column:1/-1;margin-bottom:12px}
  h1{font-size:1.5rem}
  .hero h1{font-size:1.65rem}
  .addon{grid-template-columns:1fr 90px}
}
@media (min-width:700px){.cards{grid-template-columns:1fr 1fr}}
@media print{
  :root{--bg:#fff;--card:#fff;--ink:#000;--muted:#333;--line:#999;--panel:#fff;--panel-ink:#000;--num:#000}
  body{font-size:12pt}
  header.site,footer.site,.noprint,.affbox,.crumbs,.btns,nav{display:none!important}
  .result{border:1px solid #000}
  .result dd{color:#000}
  .printhead{display:block;margin-bottom:8px}
  input{border:0;border-bottom:1px solid #999;border-radius:0;padding:2px;background:#fff}
}