/* ============================================================================
   calc.css — unspurious calculators shared stylesheet
   Matches the main unspurious design system, with calculator-specific UI.
   ========================================================================== */
:root{
  --paper:#F0F3F4; --panel:#FAFBFB; --ink:#1C2B36; --muted:#5C6B76;
  --rule:#C9D3D8; --grid:rgba(28,43,54,.06);
  --claret:#A8324E; --claret-soft:#E7C4CD;
  --azure:#2C7DA0; --ochre:#C8890F; --violet:#5E548E;
  --green:#2F7D5B;
  --serif:"STIX Two Text",Georgia,serif;
  --sans:"IBM Plex Sans",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
  --maxw:1060px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:.001s!important}}
body{
  background:var(--paper);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:28px 28px;
  color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.65;
}
a{color:inherit}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ───────── header ───────── */
header.site{border-bottom:1px solid var(--rule);background:rgba(240,243,244,.9);backdrop-filter:blur(8px);position:sticky;top:0;z-index:50}
.site-bar{max-width:var(--maxw);margin:0 auto;padding:13px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.site-name{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink)}
.logomark{width:30px;height:30px;flex:none}
.wordmark{font-family:var(--serif);font-weight:600;font-size:1.32rem;letter-spacing:-.01em}
.wordmark .pre{color:var(--muted)} .wordmark .tail{color:var(--claret)}
.wordmark .sub{font-family:var(--mono);font-size:.6rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-left:8px;vertical-align:middle;font-weight:400}
.site-nav{display:flex;gap:20px;align-items:center;font-family:var(--mono);font-size:.82rem}
.site-nav a{text-decoration:none;color:var(--muted);transition:color .15s}
.site-nav a:hover,.site-nav a[aria-current]{color:var(--claret)}
.site-nav a.opt{color:var(--muted)}
@media(max-width:680px){.site-nav a.opt{display:none}.wordmark .sub{display:none}}

/* ───────── layout ───────── */
main{padding:36px 0 0}
.crumbs{font-family:var(--mono);font-size:.74rem;color:var(--muted);letter-spacing:.02em;margin-bottom:20px}
.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--claret)}
.page-head{margin-bottom:30px;max-width:760px}
.page-head .eyebrow{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--claret);margin-bottom:12px}
h1{font-family:var(--serif);font-weight:700;font-size:2.5rem;line-height:1.08;letter-spacing:-.015em;margin-bottom:14px}
.page-head .lede{font-size:1.12rem;color:var(--ink);max-width:64ch}
h2{font-family:var(--serif);font-weight:600;font-size:1.6rem;line-height:1.15;margin:0 0 14px;letter-spacing:-.01em}
h3{font-family:var(--serif);font-weight:600;font-size:1.2rem;margin:0 0 8px}
.kicker{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
/* section labels promoted to real headings (h2/h3) for SEO + screen-reader outline:
   keep them visually identical to the old <span>/<p> by neutralising the heading weight/leading */
h2.panel-label,h3.panel-label,h2.kicker,h3.kicker,h2.group-label{font-weight:inherit;line-height:inherit}

/* FAQ (expandable, crawlable; powers FAQPage structured data) */
.faq{margin-top:22px;max-width:840px}
.faq > .kicker{margin-bottom:6px}
.faq-item{border-bottom:1px solid var(--rule)}
.faq-item:last-child{border-bottom:none}
.faq-item > summary{cursor:pointer;list-style:none;padding:14px 0;font-family:var(--sans);font-weight:500;font-size:1.02rem;color:var(--ink);display:flex;justify-content:space-between;align-items:flex-start;gap:18px}
.faq-item > summary::-webkit-details-marker{display:none}
.faq-item > summary::after{content:"+";font-family:var(--mono);color:var(--muted);font-size:1.15rem;line-height:1.4;flex:none}
.faq-item[open] > summary::after{content:"\2013"}
.faq-item > summary:hover{color:var(--claret)}
.faq-a{padding:0 0 16px;color:var(--muted);line-height:1.6;max-width:74ch}
.faq-a p{margin:0 0 10px}.faq-a p:last-child{margin:0}
.faq-a a{color:var(--claret);text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:.06em}
.prose p{margin:0 0 14px;max-width:68ch}
.prose a{color:var(--claret);text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:.06em}

/* ───────── calculator grid ───────── */
.calc-grid{display:grid;grid-template-columns:minmax(0,420px) minmax(0,1fr);gap:28px;align-items:start;margin-bottom:40px}
@media(max-width:860px){.calc-grid{grid-template-columns:1fr}}

.panel{background:var(--panel);border:1px solid var(--rule);border-radius:14px;padding:24px}
.panel + .panel{margin-top:22px}
.panel-label{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:16px;display:block}

/* tabs */
.tabs{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px;border-bottom:1px solid var(--rule);padding-bottom:0}
.tab{appearance:none;border:none;background:none;cursor:pointer;font-family:var(--mono);font-size:.78rem;color:var(--muted);padding:8px 12px;border-bottom:2px solid transparent;margin-bottom:-1px;transition:color .15s,border-color .15s}
.tab:hover{color:var(--ink)}
.tab[aria-selected="true"]{color:var(--claret);border-bottom-color:var(--claret)}

/* inputs */
.field{margin-bottom:15px}
.field label{display:block;font-size:.9rem;font-weight:500;margin-bottom:5px}
.field .hint{font-family:var(--mono);font-size:.7rem;color:var(--muted);font-weight:400;text-transform:none;letter-spacing:0}
.field input[type=number],.field input[type=text],.field select,.field textarea{
  width:100%;font-family:var(--mono);font-size:.95rem;color:var(--ink);background:var(--paper);
  border:1px solid var(--rule);border-radius:8px;padding:10px 12px;transition:border-color .15s,box-shadow .15s}
.field textarea{min-height:88px;resize:vertical;line-height:1.5}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--azure);box-shadow:0 0 0 3px rgba(44,125,160,.13)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field-row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}
@media(max-width:480px){.field-row,.field-row3{grid-template-columns:1fr}}
.inline-opts{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.chip{appearance:none;cursor:pointer;font-family:var(--mono);font-size:.76rem;border:1px solid var(--rule);background:var(--paper);color:var(--muted);border-radius:999px;padding:6px 13px;transition:all .15s}
.chip:hover{border-color:var(--azure);color:var(--ink)}
.chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.btn{appearance:none;cursor:pointer;font-family:var(--mono);font-size:.84rem;letter-spacing:.03em;border:1px solid var(--ink);background:var(--ink);color:var(--paper);border-radius:999px;padding:11px 24px;transition:background .18s,border-color .18s;margin-top:6px}
.btn:hover{background:var(--claret);border-color:var(--claret)}
.btn:focus-visible{outline:2px solid var(--claret);outline-offset:2px}

/* ───────── results ───────── */
.result-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:4px}
.result-main{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:14px;margin:6px 0 20px}
.rstat{border:1px solid var(--rule);border-radius:10px;padding:14px 16px;background:var(--paper)}
.rstat .rv{font-family:var(--serif);font-weight:700;font-size:1.7rem;line-height:1;color:var(--ink);word-break:break-word}
.rstat .rv.claret{color:var(--claret)} .rstat .rv.azure{color:var(--azure)} .rstat .rv.green{color:var(--green)}
.rstat .rl{font-family:var(--mono);font-size:.66rem;letter-spacing:.03em;text-transform:uppercase;color:var(--muted);margin-top:8px;line-height:1.3}

.plot{margin:6px 0 8px}
.plot svg{width:100%;height:auto;display:block}

/* show-your-working */
.work{border:1px solid var(--rule);border-radius:10px;background:var(--paper);margin-top:8px;overflow:hidden}
.work > summary{cursor:pointer;list-style:none;padding:13px 16px;font-family:var(--mono);font-size:.78rem;letter-spacing:.03em;color:var(--ink);display:flex;align-items:center;justify-content:space-between}
.work > summary::-webkit-details-marker{display:none}
.work > summary::after{content:"+";color:var(--muted);font-size:1.1rem}
.work[open] > summary::after{content:"−"}
.work > summary:hover{color:var(--claret)}
.work-body{padding:4px 18px 18px;font-size:.95rem}
.work-body .step{margin:12px 0;padding-left:14px;border-left:2px solid var(--rule)}
.work-body .step b{font-weight:600}
.math{font-family:var(--mono);font-size:.9rem;background:var(--panel);border:1px solid var(--rule);border-radius:6px;padding:9px 12px;margin:7px 0;overflow-x:auto;white-space:nowrap}
.math .sub{font-size:.78em;vertical-align:sub} .math .sup{font-size:.78em;vertical-align:super}

/* interpretation + callouts */
.interp{border:1px solid var(--rule);border-left:3px solid var(--azure);border-radius:10px;background:var(--panel);padding:18px 20px;margin-top:18px}
.interp .il{font-family:var(--mono);font-size:.68rem;letter-spacing:.06em;text-transform:uppercase;color:var(--azure);margin-bottom:8px}
.interp p{margin:0 0 9px;font-size:1rem;line-height:1.55}.interp p:last-child{margin-bottom:0}
.callout{border:1px solid var(--rule);border-left:3px solid var(--ochre);border-radius:10px;background:#FBF6EC;padding:14px 18px;margin-top:14px;font-size:.95rem}
.callout.warn{border-left-color:var(--claret);background:#FBEEF1}
.callout .cl{font-family:var(--mono);font-size:.66rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ochre);margin-bottom:6px;font-weight:500}
.callout.warn .cl{color:var(--claret)}
.callout a{color:var(--claret)}

/* report + code export */
.export-tabs{display:flex;gap:4px;margin-bottom:0}
.export-tabs .tab{font-size:.74rem;padding:7px 11px}
.codebox{position:relative;background:#10202b;border-radius:10px;padding:16px 18px;margin-top:10px;overflow-x:auto}
.codebox pre{font-family:var(--mono);font-size:.82rem;line-height:1.55;color:#d7e3ea;white-space:pre;margin:0}
.codebox .cmt{color:#6f8b9a}
.copybtn{position:absolute;top:10px;right:10px;font-family:var(--mono);font-size:.68rem;color:#9fb4c0;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:6px;padding:4px 9px;cursor:pointer}
.copybtn:hover{color:#fff;background:rgba(255,255,255,.12)}
.report-line{font-family:var(--mono);font-size:.92rem;background:var(--paper);border:1px solid var(--rule);border-radius:8px;padding:12px 14px;line-height:1.6}
.muted{color:var(--muted)}
.smallnote{font-size:.84rem;color:var(--muted);margin-top:10px}

/* shareable-link bar */
.share-bar{display:flex;align-items:center;gap:12px;margin-top:20px;padding-top:16px;border-top:1px solid var(--rule);flex-wrap:wrap}
.sharebtn{appearance:none;cursor:pointer;font-family:var(--mono);font-size:.76rem;border:1px solid var(--rule);background:var(--paper);color:var(--muted);border-radius:999px;padding:8px 15px;transition:border-color .15s,color .15s}
.sharebtn:hover{border-color:var(--azure);color:var(--ink)}
.sharebtn:focus-visible{outline:2px solid var(--azure);outline-offset:2px}
.share-msg{font-family:var(--mono);font-size:.72rem;color:var(--green)}

/* plain-English explainer note */
.explain{margin-top:22px;max-width:840px}
.explain .explain-body > p{margin:0 0 16px;max-width:72ch;color:var(--ink)}
.explain dl{margin:0;display:grid;grid-template-columns:minmax(120px,180px) 1fr;gap:11px 22px}
.explain dt{font-family:var(--mono);font-size:.8rem;color:var(--claret);font-weight:500;line-height:1.45}
.explain dd{margin:0;color:var(--muted);line-height:1.55;font-size:.95rem}
@media(max-width:560px){.explain dl{grid-template-columns:1fr;gap:3px 0}.explain dt{margin-top:12px}.explain dd{margin-bottom:4px}}

/* ───────── directory / cards ───────── */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.ccard{display:block;text-decoration:none;color:inherit;border:1px solid var(--rule);border-radius:12px;background:var(--panel);padding:20px;transition:border-color .15s,transform .15s,box-shadow .15s}
.ccard:hover{border-color:var(--azure);transform:translateY(-2px);box-shadow:0 6px 20px rgba(28,43,54,.07)}
.ccard .tag{font-family:var(--mono);font-size:.66rem;letter-spacing:.06em;text-transform:uppercase;color:var(--claret);margin-bottom:10px;display:block}
.ccard h3{margin-bottom:6px}
.ccard p{font-size:.92rem;color:var(--muted);margin:0}
.ccard.soon{opacity:.55}
.ccard.soon .tag{color:var(--muted)}
.group-label{font-family:var(--mono);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:34px 0 14px;padding-bottom:8px;border-bottom:1px solid var(--rule)}

/* ───────── footer ───────── */
.related{margin-top:46px}
.related .kicker{margin-bottom:16px}
footer.site{border-top:1px solid var(--rule);margin-top:64px;padding:26px 0;font-family:var(--mono);font-size:.76rem;color:var(--muted)}
footer.site .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
footer.site a{color:var(--muted);text-decoration:none}footer.site a:hover{color:var(--claret)}

/* ───────── home / directory (scoped to body.home; no calculator page is affected) ───────── */
.home main{padding-top:0}
.home .hero{padding:48px 0 26px;max-width:800px}
.home .hero .eyebrow{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--claret);margin-bottom:14px}
.home .hero h1{font-size:3rem;line-height:1.05;margin-bottom:16px}
.home .hero .lede{font-size:1.16rem;color:var(--ink);max-width:62ch;margin-bottom:22px}
.home .hero .lede a{color:var(--claret);text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:.06em}
.home .hero-stats{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.home .hstat{font-family:var(--mono);font-size:.72rem;letter-spacing:.01em;color:var(--muted);background:var(--panel);border:1px solid var(--rule);border-radius:999px;padding:7px 14px;display:inline-flex;align-items:center;gap:8px}
.home .hstat b{color:var(--ink);font-weight:600}
.home .hstat .dot{width:7px;height:7px;border-radius:50%;flex:none}
.home .popular{font-size:.96rem;color:var(--muted);line-height:1.9}
.home .popular b{font-family:var(--mono);font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:500;margin-right:8px}
.home .popular a{color:var(--azure);text-decoration:none;border-bottom:1px solid transparent;transition:border-color .15s;white-space:nowrap}
.home .popular a:hover{border-bottom-color:var(--azure)}

/* sticky search + filter toolbar */
.home .toolbar{position:sticky;top:56px;z-index:40;background:rgba(240,243,244,.92);backdrop-filter:blur(8px);border:1px solid var(--rule);border-radius:14px;padding:14px;margin:6px 0 28px;display:flex;flex-direction:column;gap:12px}
.home .searchwrap{position:relative;display:flex;align-items:center}
.home .searchwrap .ico{position:absolute;left:13px;width:17px;height:17px;color:var(--muted);pointer-events:none}
.home #q{width:100%;font-family:var(--sans);font-size:1rem;color:var(--ink);background:var(--paper);border:1px solid var(--rule);border-radius:10px;padding:12px 14px 12px 40px;transition:border-color .15s,box-shadow .15s}
.home #q::placeholder{color:var(--muted)}
.home #q:focus{outline:none;border-color:var(--azure);box-shadow:0 0 0 3px rgba(44,125,160,.13)}
.home .catpills{display:flex;flex-wrap:wrap;gap:7px;align-items:center}
.home .catpill{appearance:none;cursor:pointer;font-family:var(--mono);font-size:.74rem;border:1px solid var(--rule);background:var(--paper);color:var(--muted);border-radius:999px;padding:6px 12px;transition:all .15s;display:inline-flex;align-items:center;gap:6px}
.home .catpill:hover{border-color:var(--azure);color:var(--ink)}
.home .catpill[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.home .catpill .n{font-size:.66rem;opacity:.65;font-variant-numeric:tabular-nums}
.home .resultcount{font-family:var(--mono);font-size:.72rem;color:var(--muted);margin-left:auto;white-space:nowrap}

/* category sections + colour-coded cards */
.home .cat{margin-bottom:30px}
.home .cat .group-label{display:flex;align-items:center;gap:10px;margin-top:0}
.home .cat-count{font-family:var(--mono);font-size:.7rem;color:var(--muted);background:var(--panel);border:1px solid var(--rule);border-radius:999px;padding:1px 9px;letter-spacing:0}
.home .ccard{position:relative;overflow:hidden}
.home .ccard::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--rule);transition:background .15s}
.home .ccard h3{font-size:1.16rem}
.home .cat[data-cat=foundations] .ccard::before{background:var(--azure)} .home .cat[data-cat=foundations] .ccard .tag{color:var(--azure)}
.home .cat[data-cat=inference] .ccard::before{background:var(--claret)} .home .cat[data-cat=inference] .ccard .tag{color:var(--claret)}
.home .cat[data-cat=probability] .ccard::before{background:var(--violet)} .home .cat[data-cat=probability] .ccard .tag{color:var(--violet)}
.home .cat[data-cat=epidemiology] .ccard::before{background:var(--green)} .home .cat[data-cat=epidemiology] .ccard .tag{color:var(--green)}
.home .cat[data-cat=economics] .ccard::before{background:var(--ochre)} .home .cat[data-cat=economics] .ccard .tag{color:var(--ochre)}

.home .noresults{display:none;text-align:center;padding:54px 20px;color:var(--muted);font-family:var(--mono);font-size:.92rem}

/* closing band */
.home .closer{margin-top:48px;background:var(--ink);border-radius:18px;padding:42px 40px}
.home .closer h2{color:var(--paper);font-size:1.7rem;margin-bottom:24px}
.home .closer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}
.home .closer-grid h3{font-family:var(--mono);font-size:.72rem;letter-spacing:.07em;text-transform:uppercase;color:#fff;margin-bottom:9px;font-weight:500}
.home .closer-grid p{font-size:.94rem;color:#c4d0d7;line-height:1.55;margin:0}
.home .closer-grid a{color:#fff;text-decoration:underline;text-underline-offset:2px}
.home .closer-foot{margin-top:28px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);font-family:var(--mono);font-size:.78rem;color:#8ba0ab}
@media(max-width:680px){.home .hero h1{font-size:2.2rem}.home .toolbar{top:0;border-radius:0;margin-left:-24px;margin-right:-24px;border-left:none;border-right:none}.home .resultcount{margin-left:0}.home .closer{padding:30px 24px}}