:root{--bg:#faf6ee;--paper:#fffdf8;--ink:#2a2118;--muted:#6a5d4f;--line:#e4d9c6;--red:#8c1d18;--red2:#6e1511;--gold:#b8862b;--ok:#1f6b3a;--err:#a3201a;--focus:#1d4ed8;--serif:Georgia,"Times New Roman",Times,serif;--sans:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
*{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)}
a{color:var(--red)}a:hover{color:var(--red2)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.wrap{max-width:980px;margin:0 auto;padding:0 18px}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px 12px;z-index:9}.skip:focus{left:8px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.site-head{background:var(--red);color:#fff;border-bottom:4px solid var(--gold)}
.site-head .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:6px 18px;padding-top:10px;padding-bottom:10px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font:700 1.15rem/1.2 var(--serif)}
.brand:hover{color:#fff}.brand svg{width:34px;height:34px;flex:none}
.nav{display:flex;flex-wrap:wrap;gap:4px 16px}.nav a{color:#fff;text-decoration:none;padding:4px 0;border-bottom:2px solid transparent;font-size:.97rem}
.nav a:hover,.nav a[aria-current=page]{border-bottom-color:var(--gold)}
main{padding-bottom:40px}
h1,h2,h3{font-family:var(--serif);line-height:1.25;color:#231a12}
h1{font-size:2.1rem;margin:22px 0 8px}h2{font-size:1.45rem;margin:34px 0 10px}h3{font-size:1.12rem;margin:22px 0 6px}
.lede{font-size:1.08rem;color:#3d3125;margin:0 0 18px}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:14px 0 0;font-size:.9rem;color:var(--muted)}
.crumbs li+li::before{content:"\203A";margin-right:6px}
.tool{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:0 2px 0 var(--line)}

/* converter tools */
.lbl{display:block;font-weight:700;margin-bottom:4px}
.tool input[type=text],.tool input[type=search],.tool input[type=date],.tool select,.filter input{width:100%;min-height:44px;font:600 1.4rem/1.2 var(--serif);padding:9px 12px;border:2px solid #cdbfa8;border-radius:10px;background:#fff;color:var(--ink)}
.tool select,.tool input[type=date],.fields input{font-size:1.1rem}
.tool input[aria-invalid=true]{border-color:var(--err)}
.tool .row{display:flex;gap:8px;align-items:center}
.modes{border:0;padding:0;margin:0 0 10px;display:flex;flex-wrap:wrap;gap:4px 16px}
.modes label,.f-check label{display:flex;align-items:center;gap:6px;min-height:44px;cursor:pointer}
.hint{font-size:.88rem;color:var(--muted);margin:4px 0 0}
.out{margin-top:14px;border-top:1px dashed var(--line);padding-top:12px;min-height:3em}
.res-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.res{font:700 2.1rem/1.2 var(--serif);color:var(--red);letter-spacing:.03em;word-break:break-word}
.bd{font:600 1.1rem/1.4 var(--serif);margin:6px 0 0}
.warn:empty,.msg:empty,.res-link:empty,.note:empty,.status:empty{display:none}
.warn{color:#7a4b00;background:#fff4dc;border-left:4px solid var(--gold);padding:8px 12px;border-radius:6px;margin:10px 0 0}
.msg{color:var(--muted);margin:10px 0 0}
.msg.err{color:var(--err);background:#fdecea;border-left:4px solid var(--err);padding:8px 12px;border-radius:6px}
.status{font-size:.9rem;color:var(--ok)}
.note{font-size:.92rem;color:var(--muted)}
.parts{margin:10px 0 0;max-width:420px}
.parts td:last-child{font-family:var(--serif);font-weight:700;color:var(--red)}
.home-link{margin:12px 0 0}
.mini{margin:10px 0}
.chips ul{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:14px 0}
.chips a{display:inline-flex;align-items:center;min-height:44px;border:1px solid var(--line);background:#fff;border-radius:999px;padding:4px 14px;font:600 .95rem var(--serif);text-decoration:none}
.chips a:hover{border-color:var(--red)}
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px;align-items:end;margin:0 0 10px}
.f-date{grid-column:span 2}
.readback{margin:8px 0 0;color:var(--muted)}
/* answer and blocks */
.answer{background:var(--paper);border:1px solid var(--line);border-left:6px solid var(--red);border-radius:12px;padding:16px 18px;margin:8px 0 6px;font:700 1.9rem/1.25 var(--serif)}
.answer strong{color:var(--red);letter-spacing:.04em;word-break:break-word}
.copy-row{display:flex;align-items:center;gap:10px;margin:8px 0 0}
.intro{font-size:1.08rem;color:#3d3125;margin:0 0 18px}
.bd-t{max-width:460px}.bd-t td:nth-child(2){font-family:var(--serif);font-weight:700;color:var(--red)}
.bd-t tr.total th,.bd-t tr.total td{border-top:2px solid var(--ink);font-weight:700}
.steps li{margin:3px 0}
.sample{display:inline-block;font:700 1.5rem var(--serif);border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 16px;margin:4px 0}
.symbols td:first-child,.symbols th[scope=row]{font-family:var(--serif);font-weight:700;color:var(--red)}
.cols{columns:3 160px;padding-left:1.2em}
.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.mini-t td,.list-t td,.chart-t td:last-child,.years-t td,.large-t td:nth-child(2){font-family:var(--serif);font-weight:700;color:var(--red)}
.strip{font:700 1.2rem/1.7 var(--serif);color:var(--red);word-spacing:.35em}
.example-box{background:var(--paper);border:1px dashed var(--gold);border-radius:12px;padding:10px 16px;margin:10px 0}
/* jumps, chart, years */
.jumps ul{display:flex;flex-wrap:wrap;gap:6px;list-style:none;padding:0;margin:12px 0}
.jumps a{display:inline-flex;align-items:center;min-height:44px;padding:4px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;text-decoration:none;font-weight:600}
.jumps.sticky{position:sticky;top:0;z-index:2;background:var(--bg)}
.downloads ul{padding-left:1.2em}.downloads li{margin:6px 0}.downloads .meta{color:var(--muted);font-size:.9rem}
.tools-row{display:flex;flex-wrap:wrap;gap:14px;align-items:end;margin:10px 0}
.filter{flex:1 1 260px}.count{margin:4px 0 0;font-size:.9rem;color:var(--muted)}
.chart-sec{content-visibility:auto;contain-intrinsic-size:auto 3600px}
.chart-t{max-width:420px}.chart-t td{padding:4px 10px}
.decades{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:4px 16px}
.decade h3{margin:14px 0 4px}.years-t td,.years-t th{padding:3px 8px}
.rounds{list-style:none;padding:0}.rounds li{margin:3px 0}
/* large numerals */
.bar{border-top:2px solid currentColor;padding-top:1px}
.big-n{font:700 1.3rem var(--serif);color:var(--red)}
.btns{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;font:600 1rem/1 var(--sans);padding:11px 16px;border-radius:10px;border:2px solid var(--red);background:var(--red);color:#fff;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--red2);color:#fff}.btn.ghost{background:#fff;color:var(--red)}.btn.ghost:hover{background:#f6ece4}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.btn.small{padding:6px 10px;font-size:.88rem}
.tbl{overflow-x:auto;margin:10px 0}.tbl:focus-visible{outline:2px solid var(--red);outline-offset:2px}
table{border-collapse:collapse;width:100%;background:#fff}
th,td{border:1px solid var(--line);padding:7px 10px;text-align:left;vertical-align:top}
th{background:#f4ecdf;font-weight:700}
caption{caption-side:top;text-align:left;font-weight:700;padding:4px 0}
td.rn,.rn-cell{font-family:var(--serif);font-weight:700;color:var(--red)}
.qa{border-top:1px solid var(--line);padding-top:4px}.qa h3{margin-top:14px}
.content ul,.content ol{padding-left:1.3em}
.reviewed,.last-updated{font-size:.88rem;color:var(--muted)}
.related ul{columns:2;padding-left:1.2em}
.site-foot{background:#2a2118;color:#e9dfcf;margin-top:30px;padding:24px 0 30px;font-size:.92rem}
.site-foot a{color:#f3d9a4}.foot-links a{display:inline-block;padding:10px 0}.foot-links{display:flex;flex-wrap:wrap;gap:6px 16px;margin-bottom:10px}
.site-foot p{margin:6px 0}

@media (max-width:640px){
 .intro{margin-bottom:12px}.tools-row{gap:8px 14px;margin:0 0 4px;align-items:center}.tools-row .filter{flex:1 1 100%}.tools-row .count{margin:0}
 .downloads ul{margin:4px 0;padding-left:1.1em}.downloads li{margin:0;line-height:1.45}.downloads .meta{display:none}
 h1{font-size:1.7rem}.answer{font-size:1.5rem}.res{font-size:1.7rem}.related ul{columns:1}.two{grid-template-columns:1fr}.nav{gap:2px 12px}.f-date{grid-column:auto}
}
@media print{
 @page{margin:12mm}
 body{background:#fff;font-size:11pt;color:#000}
 .site-head,.site-foot,.crumbs,.no-print,.filter,.faq,.related,.skip,.tool,.chips,.jumps,.home-link,.copy-row,button{display:none!important}
 a{color:#000;text-decoration:none}
 .res,.answer strong,td{color:#000!important}
 .chart-sec{content-visibility:visible;break-inside:auto}
 tr{break-inside:avoid}
 h2,h3{break-after:avoid}
 .decade,.list-t,.mini-t,.symbols,.bd-t{break-inside:avoid}
 .chart-t{max-width:none}
}