:root{
  --ink:#1c2330; --muted:#566170; --folder:#22406a; --folder-2:#2f5687;
  --paper:#f7f8fa; --card:#ffffff; --line:#d5dae0; --silver:#b8bec6; --red:#9e1b2c;
  --serif:"Libre Caslon Text",Georgia,serif; --sans:"Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.6 var(--sans)}
a{color:var(--folder-2);text-underline-offset:2px}
a:hover{color:var(--folder)}
:focus-visible{outline:3px solid #f2b705;outline-offset:2px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:#fff;padding:8px;z-index:9}
.wrap{max-width:760px;margin:0 auto;padding:0 16px}
h1,h2,h3{font-family:var(--serif);font-weight:700;line-height:1.2;color:var(--ink)}
h1{font-size:2.3rem;margin:.4em 0 .5em;letter-spacing:-.01em}
h2{font-size:1.45rem;margin:1.8em 0 .6em}
h3{font-size:1.1rem;margin:1.2em 0 .3em}
p{margin:.6em 0}
.lead{font-size:1.13rem}
.small{font-size:.88rem;color:var(--muted)}
.top{background:var(--folder);color:#fff}
.top .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 20px;padding-top:12px;padding-bottom:12px}
.brand{display:flex;align-items:center;gap:9px;color:#fff;text-decoration:none;font-family:var(--serif);font-weight:700;font-size:1.2rem}
.top nav{display:flex;flex-wrap:wrap;gap:4px 18px}
.top nav a{color:#dfe7f2;text-decoration:none;font-size:.95rem}
.top nav a:hover{color:#fff;text-decoration:underline}
.page{padding-bottom:40px}
.crumbs{font-size:.88rem;color:var(--muted);margin-top:18px}
.crumbs a{color:var(--muted)}

/* The one bold element: the answer in a 2x2 coin holder */
.answer{display:grid;grid-template-columns:auto 1fr;gap:26px;align-items:center;background:var(--card);border:1px solid var(--line);border-left:6px solid var(--folder);padding:22px;margin:8px 0 10px}
.flip{position:relative;width:196px;height:196px;background:#fff;border:1px solid #c9ced5;display:grid;place-items:center;box-shadow:inset 0 0 0 9px #f1f3f5}
.flip::before,.flip::after{content:"";position:absolute;width:18px;height:2px;background:#9aa3ad;border-radius:1px}
.flip::before,.flip::after{width:2px;height:18px}
.flip::before{left:8px;top:50%;transform:translateY(-50%)}
.flip::after{right:8px;top:50%;transform:translateY(-50%)}
.coin .cy{font-family:var(--serif);font-size:30px;font-weight:700}
.coin .cm{font-family:var(--serif);font-size:20px;font-weight:700}
.ans .lead{font-size:1.2rem;margin-top:0}
.verdict{border-top:1px solid var(--line);padding-top:10px;margin-bottom:0}

.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;background:var(--card);font-size:.95rem}
caption{text-align:left;font-weight:600;padding:0 0 8px;color:var(--muted);font-size:.9rem}
th,td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
thead th{border-bottom:2px solid var(--ink);font-weight:700;white-space:nowrap}
tbody th{font-weight:600}
table.values td{white-space:nowrap}
table.values tbody tr:nth-child(odd){background:#fbfcfd}
.live{font-variant-numeric:tabular-nums}

ul{padding-left:1.2em}
.vars{list-style:none;padding:0;margin:0}
.vars li{border-top:1px solid var(--line);padding:6px 0 12px}
.vars li:first-child{border-top:0}
.vars h3,.vars h2{margin:.6em 0 .2em;font-size:1.12rem}
.vars h2 a{text-decoration:none}
.vrange{font-weight:700;color:var(--red);margin:.2em 0}
.src{font-size:.85rem;margin:.2em 0}
.src a{color:var(--muted)}
details{border-top:1px solid var(--line);padding:10px 0}
details:last-child{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:600}
summary:hover{color:var(--folder-2)}
.cols{columns:2 220px;column-gap:28px;padding-left:1.1em}
.cols li{break-inside:avoid;margin:2px 0}
.years{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.years a{display:inline-block;padding:4px 10px;border:1px solid var(--line);background:#fff;text-decoration:none;border-radius:3px;font-variant-numeric:tabular-nums}
.years a:hover{border-color:var(--folder-2)}
.pn{display:flex;justify-content:space-between;margin-top:14px}
.checked{margin-top:30px}

.lookup{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;background:var(--card);border:1px solid var(--line);border-left:6px solid var(--folder);padding:18px;margin:16px 0}
.lookup label{display:flex;flex-direction:column;font-weight:600;font-size:.92rem;gap:4px}
.lookup select,.lookup input{font:inherit;height:44px;padding:0 10px;border:1px solid #9aa3ad;border-radius:3px;background:#fff;min-width:150px}
.lookup input{width:110px;min-width:0}
.lookup button,.calc-btn{font:600 1rem var(--sans);background:var(--folder);color:#fff;border:0;height:44px;padding:0 18px;border-radius:3px;cursor:pointer}
.lookup button:hover{background:var(--folder-2)}
.lookup p{flex-basis:100%;margin:0}
.silverbar{background:#eef1f5;border:1px solid var(--line);padding:12px 16px;margin:18px 0}
.silverbar p{margin:0}
.calc input{width:90px;font:inherit;padding:6px 8px;border:1px solid #9aa3ad;border-radius:3px}
.total{font-size:1.25rem;margin-top:16px}
.prose h2{margin-top:1.4em}

.foot{border-top:1px solid var(--line);margin-top:30px;padding:18px 0 30px;font-size:.88rem;color:var(--muted)}
.foot a{color:var(--muted)}
.foot .links a{margin-right:14px}

@media (max-width:600px){
  body{font-size:16px}
  h1{font-size:1.85rem}
  .answer{grid-template-columns:1fr;justify-items:start;padding:16px}
  .flip{width:150px;height:150px}
  .flip .coin{width:112px;height:112px}
  table.values{font-size:.86rem}
  table.values .made{display:none}
  th,td{padding:7px 6px}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto}}