/* FineSchema — deterministic reasoning infrastructure. Monochrome (black & white). */
:root{
  --bg:#ffffff; --fg:#0a0b0d; --muted:#6a7077; --faint:#9aa0a6;
  --line:rgba(10,11,13,.14); --line-2:rgba(10,11,13,.07);
  --inv-bg:#0a0b0d; --inv-fg:#ffffff; --inv-muted:#9aa1a9; --inv-line:rgba(255,255,255,.16);
  --maxw:1240px; --pad:40px;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Helvetica,Arial,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,'SF Mono',Menlo,Consolas,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body{background:var(--bg);color:var(--fg);font-family:var(--sans);font-size:17px;line-height:1.6;font-weight:400}
a{color:inherit;text-decoration:none}
::selection{background:var(--fg);color:var(--bg)}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted);display:flex;align-items:center;gap:12px}
.eyebrow .idx{color:var(--fg)}
.mono{font-family:var(--mono)}

/* ── nav ── */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:11px;font-weight:600;letter-spacing:-.01em;font-size:18px}
.brand .mark{width:26px;height:26px;display:block}
.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{font-size:14px;color:var(--muted);transition:color .15s}
.nav-links a:hover{color:var(--fg)}
.btn{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:500;padding:10px 18px;border:1px solid var(--fg);background:var(--fg);color:var(--bg);transition:all .15s;cursor:pointer;font-family:var(--sans)}
.btn:hover{background:transparent;color:var(--fg)}
.btn--ghost{background:transparent;color:var(--fg)}
.btn--ghost:hover{background:var(--fg);color:var(--bg)}
.btn--inv{border-color:#fff;background:#fff;color:#0a0b0d}
.btn--inv:hover{background:transparent;color:#fff}
.btn--inv-ghost{border-color:rgba(255,255,255,.4);background:transparent;color:#fff}
.btn--inv-ghost:hover{border-color:#fff}
.nav-toggle{display:none;background:none;border:0;color:var(--fg);font-size:22px;cursor:pointer}

/* ── sections ── */
section{padding:120px 0;border-bottom:1px solid var(--line)}
.dark{background:var(--inv-bg);color:var(--inv-fg);border-bottom:1px solid #000}
.dark .eyebrow{color:var(--inv-muted)} .dark .eyebrow .idx{color:#fff}
.dark .muted{color:var(--inv-muted)}
.muted{color:var(--muted)}
h1,h2,h3{font-weight:600;letter-spacing:-.03em;line-height:1.04}
.display{font-size:clamp(40px,6.2vw,82px)}
.h2{font-size:clamp(32px,4.4vw,56px);letter-spacing:-.03em}
.lead{font-size:clamp(18px,2vw,22px);line-height:1.55;color:var(--muted);font-weight:400}
.dark .lead{color:#c7ccd2}
.section-head{max-width:820px;margin-bottom:64px}
.section-head h2{margin:22px 0 0}
.section-head .lead{margin-top:24px}

/* ── hero ── */
.hero{background:var(--inv-bg);color:#fff;border-bottom:1px solid #000;padding:104px 0 96px;position:relative;overflow:hidden}
.hero .grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:64px 64px;mask-image:radial-gradient(ellipse 80% 70% at 70% 30%,#000,transparent)}
.hero .wrap{position:relative}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:center}
.hero h1{margin:26px 0 0;color:#fff}
.hero .lead{margin-top:28px;max-width:600px}
.hero-cta{margin-top:40px;display:flex;gap:14px;flex-wrap:wrap}
.hero-meta{margin-top:52px;display:flex;gap:40px;flex-wrap:wrap;padding-top:30px;border-top:1px solid var(--inv-line)}
.hero-meta .m{display:flex;flex-direction:column;gap:4px}
.hero-meta .m b{font-size:24px;font-weight:600;letter-spacing:-.02em}
.hero-meta .m span{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--inv-muted)}

/* console panel */
.console{border:1px solid var(--inv-line);background:#0e1014;font-family:var(--mono);font-size:13px}
.console .bar{display:flex;align-items:center;gap:7px;padding:11px 14px;border-bottom:1px solid var(--inv-line);color:var(--inv-muted);font-size:11px;letter-spacing:.1em;text-transform:uppercase}
.console .dot{width:8px;height:8px;border:1px solid var(--inv-muted)}
.console .body{padding:18px 16px;display:flex;flex-direction:column;gap:13px}
.console .row{display:flex;gap:10px;line-height:1.5}
.console .k{color:var(--inv-muted);min-width:74px}
.console .v{color:#fff}
.console .step{display:flex;align-items:center;gap:10px;color:#c7ccd2}
.console .arrow{color:var(--inv-muted)}
.verdict{display:inline-flex;align-items:center;gap:8px;padding:3px 10px;border:1px solid #fff;font-weight:500;letter-spacing:.04em}
.verdict.blocked{background:#fff;color:#0a0b0d}
.verdict.uncertain{border-style:dashed}
.verdict.verified{background:transparent;color:#fff}
.verdict .sq{width:8px;height:8px;background:currentColor}
.verdict.uncertain .sq{background:repeating-linear-gradient(45deg,currentColor 0 2px,transparent 2px 4px)}

/* ── three verdicts strip ── */
.verdicts{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line)}
.vcard{padding:38px 32px;border-right:1px solid var(--line)}
.vcard:last-child{border-right:0}
.vcard .tag{font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;display:inline-flex;align-items:center;gap:9px;margin-bottom:16px}
.vcard .tag .glyph{width:12px;height:12px;border:1.5px solid var(--fg)}
.vcard.v .glyph{background:transparent}
.vcard.u .glyph{background:repeating-linear-gradient(45deg,var(--fg) 0 2px,transparent 2px 4px)}
.vcard.b .glyph{background:var(--fg)}
.vcard h3{font-size:21px;margin-bottom:10px}
.vcard p{font-size:15px;color:var(--muted);line-height:1.55}

/* ── generic grids ── */
.cols{display:grid;gap:0;border-top:1px solid var(--line)}
.cols.c2{grid-template-columns:1fr 1fr}
.cols.c3{grid-template-columns:repeat(3,1fr)}
.cell{padding:44px 36px 44px 0;border-bottom:1px solid var(--line)}
.cols.c2 .cell:nth-child(odd){padding-right:56px;border-right:1px solid var(--line);padding-left:0}
.cols.c2 .cell:nth-child(even){padding-left:48px}
.cell .n{font-family:var(--mono);font-size:12px;color:var(--faint);letter-spacing:.1em}
.cell h3{font-size:23px;margin:16px 0 12px}
.cell p{color:var(--muted);font-size:16px}
.dark .cell{border-color:var(--inv-line)} .dark .cell p{color:var(--inv-muted)}
.dark .cols,.dark .cols.c2 .cell:nth-child(odd){border-color:var(--inv-line)}

/* ── metrics ── */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--inv-line)}
.metric{padding:40px 30px;border-right:1px solid var(--inv-line)}
.metric:last-child{border-right:0}
.metric b{display:block;font-size:clamp(34px,4vw,50px);font-weight:600;letter-spacing:-.03em;line-height:1}
.metric span{display:block;margin-top:14px;font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--inv-muted)}

/* ── flow diagram ── */
.flow{margin-top:24px;border:1px solid var(--line);padding:8px}
.flow svg{display:block;width:100%;height:auto}
.dark .flow{border-color:var(--inv-line)}

/* ── audience ── */
.aud{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.aud .a{padding:40px 34px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.aud .a .k{font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint)}
.aud .a h3{font-size:22px;margin:14px 0 10px}
.aud .a p{color:var(--muted);font-size:15.5px}

/* ── CTA ── */
.cta{text-align:center}
.cta h2{margin:0 auto;max-width:900px}
.cta .lead{margin:26px auto 40px;max-width:620px}
.cta .hero-cta{justify-content:center}

/* ── footer ── */
footer{background:var(--inv-bg);color:#fff;padding:64px 0 48px;border:0}
.foot{display:flex;justify-content:space-between;align-items:flex-start;gap:40px;flex-wrap:wrap}
.foot .brand{color:#fff}
.foot .col{display:flex;flex-direction:column;gap:12px;font-size:14px;color:var(--inv-muted)}
.foot .col a:hover{color:#fff}
.foot-bottom{margin-top:54px;padding-top:24px;border-top:1px solid var(--inv-line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;font-family:var(--mono);font-size:12px;color:var(--inv-muted);letter-spacing:.06em}

/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* responsive */
@media(max-width:920px){
  :root{--pad:22px}
  section{padding:84px 0}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-panel{order:2}
  .cols.c2,.cols.c3,.metrics,.verdicts,.aud{grid-template-columns:1fr}
  .cols.c2 .cell:nth-child(odd){border-right:0;padding-right:0}
  .cols.c2 .cell:nth-child(even){padding-left:0}
  .vcard{border-right:0;border-bottom:1px solid var(--line)}
  .metric{border-right:0;border-bottom:1px solid var(--inv-line)}
  .aud{grid-template-columns:1fr}
  .nav-links{display:none}
  .nav-links.open{display:flex;position:absolute;top:64px;left:0;right:0;flex-direction:column;gap:0;background:var(--bg);border-bottom:1px solid var(--line);padding:8px 22px 18px}
  .nav-links.open a{padding:12px 0;border-bottom:1px solid var(--line-2)}
  .nav-toggle{display:block}
}

/* ── live demo ── */
.demo{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:stretch}
.demo-input{padding:2px 0}
.demo-label{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:22px 0 10px}
.demo-input>.demo-label:first-child{margin-top:0}
.demo-label em{text-transform:none;letter-spacing:0;font-style:normal;color:var(--faint)}
.demo-actions{display:flex;flex-wrap:wrap;gap:8px}
.dchip{font-family:var(--mono);font-size:12.5px;padding:7px 12px;border:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer;transition:.15s}
.dchip:hover{border-color:var(--fg);color:var(--fg)}
.dchip.active{background:var(--fg);color:var(--bg);border-color:var(--fg)}
#demoRationale{width:100%;min-height:82px;resize:vertical;padding:13px 14px;border:1px solid var(--line);border-radius:0;font-family:var(--mono);font-size:14px;line-height:1.5;color:var(--fg);background:#fafafa}
#demoRationale:focus{outline:none;border-color:var(--fg);background:#fff}
.demo-tags{display:flex;flex-wrap:wrap;gap:8px}
.dtag{font-family:var(--mono);font-size:12px;padding:6px 11px;border:1px dashed var(--line);background:transparent;color:var(--muted);cursor:pointer;transition:.15s}
.dtag:hover{border-color:var(--fg);color:var(--fg)}
.dtag.on{background:var(--fg);color:var(--bg);border:1px solid var(--fg)}
.demo-presets{margin-top:20px;font-size:13px;color:var(--faint);display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.demo-presets a{color:var(--fg);text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.demo-output.console{min-height:330px;align-self:stretch}
.demo-verdict{display:flex;align-items:center;gap:12px;padding:6px 0 16px;border-bottom:1px solid var(--inv-line);margin-bottom:14px}
.demo-verdict .big{font-size:20px;font-weight:600;letter-spacing:.02em}

/* ── industries ── */
.inds{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.ind{padding:30px 28px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.ind-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:16px}
.ind-top .k{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--fg)}
.ind-ex{font-family:var(--mono);font-size:13px;color:var(--fg);line-height:1.5;margin-bottom:12px}
.ind-note{font-size:14px;color:var(--muted);line-height:1.55}
.verdict.tiny{font-size:10px;padding:3px 8px;letter-spacing:.08em}
.verdict.tiny .sq{width:7px;height:7px}
.ind .verdict{border-color:var(--fg);color:var(--fg)}
.ind .verdict.blocked{background:var(--fg);color:var(--bg)}
.ind .verdict.uncertain{border-style:dashed;background:transparent;color:var(--fg)}
.ind .verdict .sq{background:currentColor}

/* ── pricing ── */
.tiers{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--inv-line)}
.tier{padding:34px 28px;border-right:1px solid var(--inv-line);position:relative;display:flex;flex-direction:column}
.tier:last-child{border-right:0}
.tier--mid{background:rgba(255,255,255,.045)}
.tier-flag{position:absolute;top:0;right:0;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;background:#fff;color:#0a0b0d;padding:4px 10px}
.tier-name{font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--inv-muted)}
.tier-price{font-size:40px;font-weight:600;letter-spacing:-.03em;margin:14px 0 4px}
.tier-unit{font-family:var(--mono);font-size:12px;color:var(--inv-muted);margin-bottom:22px}
.tier ul{list-style:none;display:flex;flex-direction:column;gap:11px;margin-bottom:26px;flex:1}
.tier li{font-size:14.5px;color:#c7ccd2;padding-left:18px;position:relative;line-height:1.45}
.tier li:before{content:"—";position:absolute;left:0;color:var(--inv-muted)}
.tier .btn{width:100%;justify-content:center}

@media(max-width:920px){
  .demo,.inds,.tiers{grid-template-columns:1fr}
  .demo-input{border-right:0}
  .ind{border-right:0}
  .tier{border-right:0;border-bottom:1px solid var(--inv-line)}
}

/* ── developer band (under demo) ── */
.dev-band{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:38px;padding-top:36px;border-top:1px solid var(--line)}
.dev-h{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}
pre.code{background:#0e1014;color:#e6e8eb;font-family:var(--mono);font-size:12.5px;line-height:1.65;padding:18px 16px;overflow-x:auto;border:1px solid var(--inv-line);white-space:pre;margin:0}
pre.code .cm{color:#6a7077}
@media(max-width:920px){.dev-band{grid-template-columns:1fr}}