@font-face{font-family:"Bricolage";src:url(/assets/bricolage.a97804dc9f.woff2) format("woff2");font-weight:200 800;font-display:swap}
@font-face{font-family:"Atkinson";src:url(/assets/atkinson-400.d64ba838ef.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Atkinson";src:url(/assets/atkinson-700.140e2bd25a.woff2) format("woff2");font-weight:700;font-display:swap}

:root{
  --paper:#F4F7FA; --white:#fff; --ink:#10223B; --ink2:#44566E; --line:#CFDCD6; --wash:#E6F0EC;
  --cobalt:#2446C8; --cobalt-d:#1A349A; --gold:#F0A81C; --gold-wash:#FDF1D2; --red:#A8261D; --green:#1E6B47;
  --r-s:8px; --r-m:12px; --r-l:18px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.62 "Atkinson",system-ui,sans-serif}
h1,h2,h3,.brand{font-family:"Bricolage","Atkinson",system-ui,sans-serif;letter-spacing:-.01em;line-height:1.12;margin:0}
h1{font-size:clamp(2rem,5.2vw,3.1rem);font-weight:760}
h2{font-size:clamp(1.45rem,3vw,1.9rem);font-weight:720;margin-top:2.6rem}
h3{font-size:1.2rem;font-weight:700;margin-top:1.8rem}
p,ul,ol,table{margin:.9rem 0}
a{color:var(--cobalt);text-underline-offset:.18em;text-decoration-thickness:.08em}
a:hover{color:var(--cobalt-d)}
:focus-visible{outline:3px solid var(--cobalt);outline-offset:2px;border-radius:4px}
.wrap{width:min(1080px,100% - 2rem);margin-inline:auto}
.narrow{width:min(720px,100% - 2rem);margin-inline:auto}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:.6rem 1rem;z-index:9}
.skip:focus{left:.5rem;top:.5rem}

/* header */
.site-head{background:var(--white);border-bottom:1px solid var(--line)}
.site-head .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.4rem 1.5rem;padding:.7rem 0}
.brand{font-size:1.5rem;font-weight:800;color:var(--ink);text-decoration:none;display:inline-flex;align-items:center;gap:.5rem}
.brand svg{width:1.55rem;height:1.55rem}
.brand b{color:var(--cobalt);font-weight:800}
.nav{display:flex;flex-wrap:wrap;gap:.1rem .2rem}
.nav a{color:var(--ink);text-decoration:none;padding:.4rem .65rem;border-radius:var(--r-s);font-size:.97rem}
.nav a:hover{background:var(--wash)}
.nav a[aria-current="page"]{background:var(--ink);color:#fff}

/* hero with chart-paper ground */
.hero{background:
  linear-gradient(var(--line) 1px,transparent 1px) 0 0/28px 28px,
  linear-gradient(90deg,var(--line) 1px,transparent 1px) 0 0/28px 28px,var(--paper);
  border-bottom:1px solid var(--line);padding:2.4rem 0 2.6rem}
.hero h1{max-width:20ch}
.hero .lead{max-width:56ch;font-size:1.12rem;color:var(--ink2);margin:.9rem 0 1.6rem}
.crumbs{font-size:.92rem;color:var(--ink2);margin:0 0 1rem}
.crumbs a{color:var(--ink2)}

/* tool panel */
.tool-panel{background:var(--white);border:1.5px solid var(--ink);border-radius:var(--r-l);box-shadow:6px 6px 0 var(--ink);padding:1.2rem}
.tool{display:grid;grid-template-columns:repeat(6,1fr);gap:.9rem}
.field{grid-column:span 3;display:flex;flex-direction:column;gap:.3rem;min-width:0}
.field.wide{grid-column:1/-1}
.field.third{grid-column:span 2}
label,.legend{font-weight:700;font-size:.98rem}
.hint{font-size:.9rem;color:var(--ink2);margin:.1rem 0 0}
input[type=text],input[type=number],input[type=date],select{font:inherit;color:var(--ink);background:#fff;border:1.5px solid #8FA19A;border-radius:var(--r-s);padding:.62rem .7rem;width:100%;min-height:2.9rem}
input:hover,select:hover{border-color:var(--ink)}
.pair{display:grid;grid-template-columns:1fr auto;gap:.5rem}
.pair select{width:auto}
.chips{display:flex;flex-wrap:wrap;gap:.5rem}
.chips label{font-weight:400;display:flex;align-items:center;gap:.45rem;border:1.5px solid #8FA19A;border-radius:var(--r-s);padding:.55rem .8rem;min-height:2.9rem;cursor:pointer;background:#fff}
.chips input{accent-color:var(--cobalt);width:1.1rem;height:1.1rem}
.chips label:has(input:checked){border-color:var(--cobalt);background:#EAF0FF}
fieldset{border:0;margin:0;padding:0;min-width:0}
.actions{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:.7rem;align-items:center}
.btn{font:700 1.02rem "Atkinson",sans-serif;background:var(--cobalt);color:#fff;border:0;border-radius:var(--r-s);padding:.75rem 1.4rem;min-height:3rem;cursor:pointer}
.btn:hover{background:var(--cobalt-d)}
.btn.ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn.ghost:hover{background:var(--wash)}
.err{grid-column:1/-1;color:var(--red);font-weight:700;margin:0}
.err:empty{display:none}

/* result */
.result{margin-top:1.3rem;border-top:1.5px dashed var(--line);padding-top:1.3rem}
.result[hidden]{display:none}
.res-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:1.4rem;align-items:start}
.res-lead{font-size:1rem;color:var(--ink2);margin:0}
.big{font-family:"Bricolage",sans-serif;font-weight:800;font-size:clamp(2.6rem,7vw,4rem);line-height:1;margin:.25rem 0 .2rem;font-variant-numeric:tabular-nums}
.big small{font-size:.42em;font-weight:700;color:var(--ink2)}
.range{font-size:1.08rem;margin:.2rem 0 .8rem}
.note{background:var(--gold-wash);border-left:5px solid var(--gold);border-radius:0 var(--r-s) var(--r-s) 0;padding:.7rem .9rem;margin:.9rem 0;font-size:.97rem}
.chartbox{min-width:0}
.chartbox svg{display:block;width:100%;height:auto;overflow:visible}
.ch-grid{stroke:var(--line);stroke-width:1}
.ch-axis{stroke:var(--ink);stroke-width:1.5}
.ch-band{fill:rgba(36,70,200,.14)}
.ch-line{fill:none;stroke:var(--cobalt);stroke-width:3;stroke-linejoin:round}
.ch-typ{fill:none;stroke:var(--ink2);stroke-width:2;stroke-dasharray:6 5}
.ch-dot{fill:var(--gold);stroke:var(--ink);stroke-width:2}
.ch-t{fill:var(--ink2);font:400 12px "Atkinson",sans-serif}
.ch-tb{fill:var(--ink);font:700 13px "Atkinson",sans-serif}
.legend-row{display:flex;flex-wrap:wrap;gap:.3rem 1.2rem;font-size:.92rem;color:var(--ink2);margin:.4rem 0 0}
.legend-row i{display:inline-block;width:1.6rem;height:0;border-top:3px solid var(--cobalt);vertical-align:middle;margin-right:.4rem}
.legend-row i.d{border-top:2px dashed var(--ink2)}
.legend-row i.b{height:.8rem;border:0;background:rgba(36,70,200,.2);vertical-align:-.1rem}
.legend-row i.p{width:.8rem;height:.8rem;border:2px solid var(--ink);background:var(--gold);border-radius:50%}

/* tables */
.tbl{overflow-x:auto;border:1.5px solid var(--ink);border-radius:var(--r-m);background:#fff}
table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums}
.tbl table{margin:0}
th,td{padding:.55rem .8rem;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
th{background:var(--wash);font-weight:700;font-size:.95rem}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}
td.num,th.num{text-align:right}
caption{caption-side:bottom;text-align:left;padding:.5rem .8rem;color:var(--ink2);font-size:.92rem}
.sub{display:block;font-size:.82rem;color:var(--ink2);font-weight:400}

/* content */
main{padding-bottom:3rem}
.content{padding-top:.2rem}
.content > h2:first-child{margin-top:2rem}
.two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 2.2rem}
.plain-list{list-style:none;padding:0;margin:.6rem 0;columns:3 14rem;column-gap:1.6rem}
.plain-list li{break-inside:avoid;padding:.18rem 0}
.plain-list span{color:var(--ink2);font-size:.9rem}
.faq details{border-bottom:1px solid var(--line);padding:.7rem 0}
.faq summary{font-weight:700;cursor:pointer;font-family:"Bricolage",sans-serif;font-size:1.12rem}
.faq p{margin:.5rem 0 .2rem}
.source{font-size:.93rem;color:var(--ink2);border-top:1px solid var(--line);margin-top:2rem;padding-top:.9rem}
.disclaimer{font-size:.93rem;color:var(--ink2)}
.tag{display:inline-block;background:var(--wash);border-radius:6px;padding:.05rem .5rem;font-size:.88rem;margin-left:.3rem;vertical-align:.1em}
.letters{display:flex;flex-wrap:wrap;gap:.3rem;margin:1rem 0}
.letters a{border:1.5px solid var(--ink);border-radius:var(--r-s);min-width:2.3rem;text-align:center;padding:.15rem .4rem;text-decoration:none;color:var(--ink);font-weight:700}
.letters a:hover{background:var(--wash)}
.step-list{counter-reset:s;list-style:none;padding:0}
.step-list li{counter-increment:s;padding-left:2.6rem;position:relative;margin:.7rem 0}
.step-list li::before{content:counter(s);position:absolute;left:0;top:.05rem;width:1.8rem;height:1.8rem;border-radius:50%;background:var(--ink);color:#fff;font:700 .95rem "Bricolage",sans-serif;display:grid;place-items:center}
.shop{margin:1.2rem 0;padding:.9rem 1rem;border:1.5px dashed var(--ink2);border-radius:var(--r-m);font-size:.96rem}
.fine{font-size:.88rem;color:var(--ink2)}

/* footer */
.site-foot{background:var(--ink);color:#DCE6F2;padding:2rem 0 2.4rem;font-size:.95rem}
.site-foot a{color:#fff}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:1.5rem}
.foot-grid h2{font-size:1rem;margin:0 0 .5rem;color:#fff}
.foot-grid ul{list-style:none;margin:0;padding:0}
.foot-grid li{margin:.25rem 0}
.foot-grid p{margin:.3rem 0}

@media (max-width:800px){
  .res-grid{grid-template-columns:1fr}
  .two{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .field,.field.third{grid-column:1/-1}
  .tool-panel{box-shadow:4px 4px 0 var(--ink);padding:1rem}
  .hero{padding-top:1.6rem}
}
@media print{
  .site-head,.site-foot,.actions,.hero .lead,.no-print{display:none!important}
  body{background:#fff;font-size:12pt}
  .hero{background:#fff;border:0;padding:0}
  .tool-panel{box-shadow:none;border:1px solid #000}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}