/* VerifyKit shared styles. Colour tokens are on :root, with dark mode by preference or data-theme. */
:root{
  --bg:#f7f6f2; --surface:#ffffff; --surface-2:#f0eee8; --fg:#1b1b19; --muted:#55554f; --line:#d9d6cc;
  --accent:#1f4e79; --accent-fg:#ffffff; --accent-soft:#e3ecf5; --focus:#c26a00;
  --ok:#1b6a37; --ok-bg:#e5f3ea; --bad:#a01c1c; --bad-bg:#fbe9e9; --warn-bg:#fff6e0; --warn-line:#e0b44c;
  --plot-point:#1f4e79; --plot-line:#8a8a83; --plot-flag:#a01c1c;
  --radius:10px; --mono:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#121211; --surface:#1c1c1a; --surface-2:#252522; --fg:#ecebe5; --muted:#aeada5; --line:#3a3934;
    --accent:#8ebde6; --accent-fg:#0f1b26; --accent-soft:#1d2b38; --focus:#ffb454;
    --ok:#86d6a1; --ok-bg:#16301f; --bad:#f4a3a3; --bad-bg:#3a1919; --warn-bg:#2f2814; --warn-line:#9c7a24;
    --plot-point:#8ebde6; --plot-line:#7d7c75; --plot-flag:#f4a3a3;
  }
}
:root[data-theme="dark"]{
  --bg:#121211; --surface:#1c1c1a; --surface-2:#252522; --fg:#ecebe5; --muted:#aeada5; --line:#3a3934;
  --accent:#8ebde6; --accent-fg:#0f1b26; --accent-soft:#1d2b38; --focus:#ffb454;
  --ok:#86d6a1; --ok-bg:#16301f; --bad:#f4a3a3; --bad-bg:#3a1919; --warn-bg:#2f2814; --warn-line:#9c7a24;
  --plot-point:#8ebde6; --plot-line:#7d7c75; --plot-flag:#f4a3a3;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
a{color:var(--accent)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.wrap{max-width:960px;margin:0 auto;padding:0 16px}
header.site{padding:20px 0 8px}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.brand{font-weight:700;letter-spacing:.02em;color:var(--muted);font-size:.95rem;text-decoration:none}
.topnav{display:flex;gap:14px;align-items:center;flex-wrap:wrap;font-size:.93rem}
h1{font-size:clamp(1.5rem,4vw,2.1rem);line-height:1.2;margin:14px 0 6px}
.lede{color:var(--muted);margin:0 0 14px;max-width:70ch}
.btn{font:inherit;border:1px solid var(--line);background:var(--surface);color:var(--fg);border-radius:8px;padding:7px 12px;cursor:pointer;min-height:40px}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}
.btn[aria-pressed="true"]{background:var(--accent-soft);border-color:var(--accent);font-weight:600}
.btn:disabled{opacity:.55;cursor:not-allowed}
.disclaimer{background:var(--warn-bg);border:1px solid var(--warn-line);border-radius:var(--radius);padding:10px 14px;margin:6px 0 18px;font-size:.95rem}
.tabs{display:flex;gap:4px;flex-wrap:wrap;border-bottom:1px solid var(--line)}
.tabs [role="tab"]{font:inherit;background:none;border:0;border-bottom:3px solid transparent;color:var(--muted);padding:10px 12px;cursor:pointer;min-height:44px}
.tabs [role="tab"][aria-selected="true"]{color:var(--fg);border-bottom-color:var(--accent);font-weight:600}
.panel{background:var(--surface);border:1px solid var(--line);border-top:0;border-radius:0 0 var(--radius) var(--radius);padding:18px 16px 20px}
.panel h2{font-size:1.25rem;margin:0 0 4px}
.panel h3{font-size:1.02rem;margin:18px 0 6px}
.sub{color:var(--muted);margin:0 0 14px}
.presets{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 14px}
.presets span{align-self:center;color:var(--muted);font-size:.9rem;margin-right:2px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px 16px}
.field label,.field .label{display:block;font-weight:600;font-size:.95rem;margin-bottom:4px}
.field input,.field select,.field textarea{width:100%;font:inherit;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg);min-height:42px}
.field input[readonly]{background:var(--surface-2)}
.field input[aria-invalid="true"]{border-color:var(--bad)}
.field textarea{min-height:110px;font-family:var(--mono);font-size:.9rem}
.help{display:block;color:var(--muted);font-size:.85rem;margin-top:4px}
.err{display:block;color:var(--bad);font-size:.85rem;margin-top:4px}
.seg{display:flex;flex-wrap:wrap;gap:6px 16px;margin:6px 0 10px}
.seg label{display:flex;gap:6px;align-items:center;font-weight:500;cursor:pointer}
.result{margin:18px 0 0;padding:14px 16px;border-radius:var(--radius);background:var(--surface-2);border:1px solid var(--line)}
.result .big{font-size:clamp(1.6rem,6vw,2.3rem);font-weight:700;line-height:1.1;font-variant-numeric:tabular-nums}
.line{margin:6px 0 0}
.kv{display:grid;grid-template-columns:max-content 1fr;gap:4px 14px;margin:10px 0 0;font-variant-numeric:tabular-nums}
.kv dt{color:var(--muted)}.kv dd{margin:0;font-weight:600}
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-weight:700;letter-spacing:.03em}
.badge.pass{background:var(--ok-bg);color:var(--ok);border:1px solid var(--ok)}
.badge.fail{background:var(--bad-bg);color:var(--bad);border:1px solid var(--bad)}
.badge.warn{background:var(--warn-bg);color:var(--fg);border:1px solid var(--warn-line)}
.caveat{background:var(--warn-bg);border-left:4px solid var(--warn-line);padding:8px 12px;border-radius:6px;margin:14px 0 0;font-size:.93rem}
.box{border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px;margin:14px 0 0;background:var(--bg)}
.box.dashed{border-style:dashed}
details.formula{margin:14px 0 0;border:1px solid var(--line);border-radius:8px;padding:8px 12px;background:var(--bg)}
details.formula summary,details.helper summary{cursor:pointer;font-weight:600}
code,.mono{font-family:var(--mono);font-size:.9em}
.rationale{margin:18px 0 0}
.rationale h3{font-size:1rem;margin:0 0 6px}
.rationale textarea{width:100%;min-height:190px;font:inherit;font-size:.93rem;line-height:1.5;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg);resize:vertical}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:8px}
.status{color:var(--ok);font-size:.9rem;min-height:1.2em}
section.block{margin:34px 0 0}
section.block h2{font-size:1.3rem;margin:0 0 10px}
.faq details{border-bottom:1px solid var(--line);padding:10px 0}
.faq summary{cursor:pointer;font-weight:600}
.faq p{margin:8px 0 0}
details.helper{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:10px 14px;margin:0 0 16px}
table.simple{border-collapse:collapse;width:100%;font-size:.92rem}
table.simple th,table.simple td{border-bottom:1px solid var(--line);padding:6px 8px;text-align:left;vertical-align:middle}
table.simple input{width:100%;min-width:60px;font:inherit;padding:5px 7px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--fg)}
.scroll{overflow-x:auto}
.plot{width:100%;max-width:520px;height:auto;display:block;margin:8px 0 0;color:var(--fg)}
.plot .pt{fill:var(--plot-point)}
.plot .flag{fill:var(--plot-flag)}
.plot .ref{stroke:var(--plot-line);stroke-dasharray:5 4;fill:none}
.plot .curve{stroke:var(--plot-point);fill:none;stroke-width:2}
.plot .axis{stroke:var(--line)}
.plot .grid-line{stroke:var(--line);stroke-width:.5}
.plot text{fill:var(--muted);font-size:11px;font-family:inherit}
form.lead fieldset{border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;background:var(--surface)}
form.lead fieldset[disabled]{opacity:.75}
form.lead legend{font-weight:600;padding:0 6px}
.offer{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.card h2,.card h3{margin-top:0}
.price{font-size:1.25rem;font-weight:700}
footer{margin:40px 0 30px;color:var(--muted);font-size:.9rem}
#print-sheet{display:none}
@media (max-width:520px){.tabs{display:grid;grid-template-columns:1fr 1fr}.tabs [role="tab"]{text-align:left;padding:8px 6px}.panel{padding:16px 12px}.kv{grid-template-columns:1fr}.kv dd{margin-bottom:6px}}

/* ---------------------------------------------------------------- print: one-page rationale sheet */
@media print{
  @page{margin:11mm}
  body{background:#fff;color:#000;font-size:9pt;line-height:1.3}
  body.printing-sheet > *:not(#print-sheet){display:none !important}
  body.printing-sheet #print-sheet{display:block}
  #print-sheet h1{font-size:14pt;margin:0 0 4pt}
  #print-sheet h2{font-size:11pt;margin:9pt 0 3pt;border-bottom:.5pt solid #999}
  #print-sheet table{border-collapse:collapse;width:100%}
  #print-sheet td,#print-sheet th{border:.5pt solid #bbb;padding:1pt 3pt;text-align:left;vertical-align:top;font-size:8pt}
  #print-sheet .meta{font-size:8pt;color:#333}
  #print-sheet .para{white-space:pre-wrap}
  #print-sheet ol{margin:0;padding-left:14pt;font-size:7.5pt}
  #print-sheet svg{max-width:58mm}
  #print-sheet .cols{display:flex;gap:6mm;align-items:flex-start}
  #print-sheet .cols > div{flex:1 1 0}
  #print-sheet p{margin:2pt 0}
  body:not(.printing-sheet) .tabs,body:not(.printing-sheet) .presets,body:not(.printing-sheet) form.lead,body:not(.printing-sheet) #themeToggle{display:none}
}