:root{
  --ink:#15181f; --ink2:#4b5563; --ink3:#6b7280;
  --bg:#f6f7f9; --card:#fff; --line:#e4e7ec; --line2:#f0f2f5;
  --brand:#1f6feb; --brand-soft:#eaf2fe;
  --ok:#0f7b45; --ok-soft:#e7f5ec;
  --warn:#9a5b00; --warn-soft:#fdf3e2;
  --bad:#b42318; --bad-soft:#fdeceb;
  --radius:12px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:-9999px;top:0;z-index:99;background:var(--brand);color:#fff;padding:10px 14px;border-radius:0 0 8px 0}
.skip:focus{left:0}
button:focus-visible,a:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:15px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
h1,h2,h3{margin:0;line-height:1.25;letter-spacing:-.01em}
h1{font-size:clamp(28px,5vw,42px)}
h2{font-size:clamp(20px,3vw,26px)}
h3{font-size:16px}
p{margin:10px 0}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
code{
  display:block;background:#f2f4f8;border:1px solid var(--line);
  padding:8px 10px;border-radius:8px;font-size:12.5px;overflow-x:auto;margin:8px 0;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:#8a3d3d;
}
main{max-width:1120px;margin:0 auto;padding:0 20px 60px}
section{margin:0 0 56px;min-width:0}

/* header */
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;max-width:1120px;margin:0 auto;flex-wrap:wrap;
}
.brand{font-weight:700;font-size:17px;color:var(--ink);letter-spacing:-.02em}
.brand span{color:var(--brand)}
.topbar nav{display:flex;gap:18px;font-size:14px}
.topbar nav a{color:var(--ink2)}
.topbar nav a:hover{color:var(--brand)}

/* hero */
.hero{padding:36px 0 24px}
.eyebrow{font-size:12px;letter-spacing:.12em;color:var(--ink3);font-weight:600;margin:0 0 10px}
.lead{font-size:17px;color:var(--ink2);max-width:620px}
.trust{display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--ink3);margin-top:18px}
.trust span{white-space:nowrap}

/* workspace */
.workspace{
  display:grid;grid-template-columns:minmax(0,380px) minmax(0,1fr);gap:20px;align-items:start;
}
.workspace>*{min-width:0}
@media(max-width:900px){.workspace{grid-template-columns:minmax(0,1fr)}}
.inputs,.results{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;
}
.group{border-top:1px solid var(--line2);padding:16px 0 4px}
.group:first-child{border-top:0;padding-top:0}
.group h2{font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink3);margin-bottom:12px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.row:has(>label:nth-child(3)){grid-template-columns:1fr 1fr 1fr}
@media(max-width:520px){.row{grid-template-columns:1fr}.row:has(>label:nth-child(3)){grid-template-columns:1fr}}
label{display:block;font-size:13px;color:var(--ink2);margin-bottom:10px}
label input,label select{
  display:block;width:100%;margin-top:5px;padding:9px 10px;font-size:14px;color:var(--ink);
  background:#fff;border:1px solid var(--line);border-radius:8px;font-family:inherit;
}
label input:focus,label select:focus{outline:2px solid var(--brand);outline-offset:1px;border-color:var(--brand)}
label input:disabled{background:#f3f4f6;color:var(--ink3)}
.tagline{font-size:12px;color:var(--ink3);font-weight:400}
.hint{font-size:12px;color:var(--ink3);margin:6px 0 10px}
.error{color:var(--bad);font-size:13px;min-height:20px;margin:6px 0 0}

.presets{display:flex;gap:8px;flex-wrap:wrap}
.preset{
  padding:6px 10px;font-size:12px;background:#f2f4f8;border:1px solid var(--line);
  border-radius:20px;cursor:pointer;color:var(--ink2);font-family:inherit;
}
.preset:hover{border-color:var(--brand);color:var(--brand)}
.preset.scenario{background:var(--brand-soft);border-color:#cfe0fb;color:#14459c}
.preset.scenario:hover{background:#dbe9fd}

/* definition block — self-contained answer for search and AI citation */
.definition{
  background:var(--card);border:1px solid var(--line);border-left:3px solid var(--brand);
  border-radius:var(--radius);padding:18px 20px;margin:-24px 0 32px;
}
.definition p{margin:0;font-size:15.5px;color:var(--ink2);max-width:840px}
.definition strong{color:var(--ink)}

/* results */
.sticky-bar{display:none}
@media(max-width:900px){
  .sticky-bar{
    display:flex;gap:12px;justify-content:space-between;
    position:sticky;top:0;z-index:5;
    background:var(--card);border:1px solid var(--line);border-radius:10px;
    padding:10px 12px;margin:0 0 14px;
    box-shadow:0 2px 8px rgba(21,24,31,.06);
  }
  .sticky-bar span{display:flex;flex-direction:column;gap:2px;min-width:0}
  .sticky-bar b{font-size:11px;color:var(--ink3);font-weight:600;white-space:nowrap}
  .sticky-bar strong{font-size:15px;letter-spacing:-.01em;white-space:nowrap}
}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-bottom:16px}
.card{background:#fafbfc;border:1px solid var(--line2);border-radius:10px;padding:12px}
.card .k{display:block;font-size:12px;color:var(--ink3);margin-bottom:4px}
.card strong{display:block;font-size:21px;letter-spacing:-.02em}
.card small{font-size:11px;color:var(--ink3)}

.verdict{border-radius:10px;padding:14px 16px;margin:0 0 16px;font-size:14px;border:1px solid}
.verdict strong{display:block;margin-bottom:4px}
.verdict.ok{background:var(--ok-soft);border-color:#bfe3cd;color:#0a4f2c}
.verdict.warn{background:var(--warn-soft);border-color:#f0d9ae;color:#6b4000}
.verdict.bad{background:var(--bad-soft);border-color:#f3c3c0;color:#6d1a12}

.sub{font-size:14px;margin:22px 0 8px;color:var(--ink2)}
.table-wrap{max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;min-width:460px;border-collapse:collapse;font-size:13px;margin:0}
th,td{padding:9px 10px;text-align:left;border-bottom:1px solid var(--line2)}
th{background:#f7f8fa;color:var(--ink3);font-size:12px;font-weight:600;white-space:nowrap}
td{white-space:nowrap}
tbody tr.strong td{font-weight:700;background:#fafbfc}
caption{caption-side:bottom;font-size:12px;color:var(--ink3);padding-top:8px;text-align:left}
.footnote{font-size:12px;color:var(--ink3);margin-top:10px}

.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
button{font-family:inherit;font-size:14px;cursor:pointer;border-radius:8px;padding:9px 14px;border:1px solid}
.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.primary:hover{background:#1a5fd0}
.secondary{background:#fff;border-color:var(--line);color:var(--ink)}
.secondary:hover{border-color:var(--brand);color:var(--brand)}
.ghost{background:transparent;border-color:transparent;color:var(--ink3)}
.ghost:hover{color:var(--ink)}
.status{font-size:12px;color:var(--ink3);min-height:18px;margin:8px 0 0}

/* how */
.how ol{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.how li{display:flex;gap:12px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.how li span{
  flex:0 0 26px;height:26px;border-radius:50%;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;
}
.how p{font-size:13.5px;color:var(--ink2);margin:4px 0 0}

/* method */
.method{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.method-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;margin:18px 0}
.method-grid h3{font-size:14px;margin-bottom:6px}
.method-grid p{font-size:13.5px;color:var(--ink2)}
.method-grid em{font-style:italic}

/* faq */
.faq details{
  background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:14px 16px;margin-bottom:10px;
}
.faq summary{cursor:pointer;font-weight:600;font-size:14.5px}
.faq details p{font-size:14px;color:var(--ink2);margin:10px 0 0}

/* footer */
footer{
  border-top:1px solid var(--line);padding:28px 20px 40px;text-align:center;
  background:var(--card);font-size:13px;color:var(--ink3);
}
.foot-brand{font-weight:700;font-size:16px;color:var(--ink);margin-bottom:6px}
.foot-brand span{color:var(--brand)}
footer nav{display:flex;gap:16px;justify-content:center;margin:12px 0}
footer nav a{color:var(--ink2)}
footer .tagline{display:block;font-size:12px;margin-top:6px}
.noscript{background:var(--warn-soft);padding:12px 20px;text-align:center;font-size:14px;margin:0}

@media(max-width:360px){
  main{padding:0 12px 40px}
  .topbar{padding:14px 12px}
  .inputs,.results{padding:14px}
}