:root{
  --ink:#16181A;
  --paper:#F4F4F3;
  --panel:#FFFFFF;
  --navy-2:#3A3D40;
  --stamp-red:#F4680F;
  --stamp-red-bg:#FEF0E7;
  --line:#E4E3E0;
  --line-strong:#D3D2CD;
  --muted:#6B6D70;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Inter',sans-serif;
  -webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;}
.wrap{max-width:1120px;margin:0 auto;padding:0 32px;}
@media (max-width:640px){ .wrap{padding:0 20px;} }

/* ---- topbar ---- */
.topbar{
  background:#fff;
  border-bottom:1px solid var(--line-strong);
  position:sticky; top:0; z-index:50;
}
.topbar-inner{
  max-width:1120px;margin:0 auto;padding:16px 32px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
@media (max-width:640px){ .topbar-inner{padding:14px 20px;} }
.wordmark{
  font-family:'Archivo',sans-serif;font-weight:800;font-size:19px;letter-spacing:0.01em;
  display:flex; align-items:center; gap:8px;
  text-decoration:none;color:var(--ink);
}
.wordmark img{height:44px;width:auto;display:block;}
@media (max-width:640px){ .wordmark img{height:32px;} }
nav.primary-nav{display:flex;gap:28px;}
nav.primary-nav a{
  font-size:14px;font-weight:500;color:var(--navy-2);text-decoration:none;
}
nav.primary-nav a:hover{color:var(--ink);}
nav.primary-nav a.active{color:var(--ink);font-weight:600;}
@media (max-width:800px){ nav.primary-nav{display:none;} }
.btn{
  font-family:'Inter',sans-serif;font-weight:600;font-size:14px;
  padding:10px 18px;border-radius:6px;border:1px solid var(--ink);
  background:var(--ink);color:#fff;text-decoration:none;display:inline-block;
  cursor:pointer;
}
.btn:hover{background:#000;}
.btn.secondary{background:transparent;color:var(--ink);}
.btn.secondary:hover{background:var(--line);}
.btn.on-dark{background:#fff;color:var(--ink);border-color:#fff;}
.btn.on-dark:hover{background:var(--line);}

/* ---- hero (home) ---- */
.hero{padding:88px 0 72px;border-bottom:1px solid var(--line);}
.eyebrow{
  font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:0.08em;
  text-transform:uppercase;color:var(--stamp-red);font-weight:600;margin:0 0 18px;
}
h1{
  font-family:'Archivo',sans-serif;font-weight:800;font-size:52px;line-height:1.08;
  margin:0 0 22px;max-width:720px;letter-spacing:-0.01em;
}
@media (max-width:640px){ h1{font-size:34px;} }
.lede{font-size:19px;line-height:1.6;color:var(--navy-2);max-width:600px;margin:0 0 34px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---- hero (subpages) ---- */
.page-hero{padding:64px 0 56px;border-bottom:1px solid var(--line);}
.page-hero h1{font-size:40px;max-width:680px;}
@media (max-width:640px){ .page-hero h1{font-size:29px;} }
.page-hero .lede{margin-bottom:0;}

/* ---- section shell ---- */
section{padding:76px 0;border-bottom:1px solid var(--line);}
section:last-of-type{border-bottom:none;}
.section-head{max-width:640px;margin:0 0 44px;}
h2{font-family:'Archivo',sans-serif;font-weight:700;font-size:30px;margin:0 0 12px;letter-spacing:-0.01em;}
.section-sub{font-size:16px;color:var(--muted);line-height:1.6;margin:0;}

/* ---- card grid (problem / process requirements) ---- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
@media (max-width:800px){ .grid-3{grid-template-columns:1fr;} }
.card{background:var(--panel);border:1px solid var(--line-strong);border-radius:10px;padding:26px;}
.card .num{
  font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--muted);
  letter-spacing:0.05em;margin-bottom:14px;display:block;
}
.card h3{font-family:'Archivo',sans-serif;font-size:17px;margin:0 0 10px;}
.card p{font-size:14.5px;line-height:1.6;color:var(--navy-2);margin:0;}
.card.live{border-color:var(--stamp-red);background:var(--stamp-red-bg);}
.card.live .num{color:var(--stamp-red);font-weight:600;}

/* teaser cards on the home page, linking out to detail pages */
.teaser-card{text-decoration:none;color:inherit;display:block;transition:border-color .15s;}
.teaser-card:hover{border-color:var(--ink);}
.teaser-link{display:inline-block;margin-top:14px;font-size:13.5px;font-weight:600;color:var(--ink);}
.teaser-link::after{content:" →";}

/* ---- numbered steps (how it works) ---- */
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(3,1fr);gap:32px;}
@media (max-width:800px){ .steps{grid-template-columns:1fr;} }
.step{position:relative;padding-top:8px;}
.step::before{
  counter-increment:step;content:counter(step);
  font-family:'Archivo',sans-serif;font-weight:800;font-size:14px;
  width:34px;height:34px;border-radius:50%;background:var(--ink);color:#fff;
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.step h3{font-family:'Archivo',sans-serif;font-size:17px;margin:0 0 10px;}
.step p{font-size:14.5px;line-height:1.6;color:var(--navy-2);margin:0;}

/* ---- dark showcase section (demo prototype) ---- */
.demo-section{background:var(--ink);color:#fff;border-bottom:1px solid var(--line);}
.demo-section .section-sub{color:#B9BBBD;}
.demo-section .eyebrow{color:#E8A79C;}
.demo-layout{display:grid;grid-template-columns:1.05fr 0.95fr;gap:48px;align-items:center;}
@media (max-width:900px){ .demo-layout{grid-template-columns:1fr;} }
.demo-copy h2{color:#fff;}
.feature-list{list-style:none;margin:26px 0 0;padding:0;display:flex;flex-direction:column;gap:12px;}
.feature-list li{
  font-size:14.5px;line-height:1.5;color:#D6D7D8;padding-left:22px;position:relative;
}
.feature-list li::before{
  content:"→";position:absolute;left:0;color:var(--stamp-red);font-weight:700;
}
/* video panel, styled to match the old mock ledger chrome */
.video-panel{
  border-radius:10px;overflow:hidden;border:1px solid var(--line-strong);
  box-shadow:0 20px 50px rgba(0,0,0,0.35);
  background:#000;
}
.video-panel video{display:block;width:100%;height:auto;}

/* ---- source documents gallery (demo) ---- */
.source-docs{margin-top:56px;}
.source-docs > .eyebrow{margin-bottom:10px;}
.source-docs > .section-sub{margin-bottom:24px;}
.source-docs-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
@media (max-width:800px){ .source-docs-grid{grid-template-columns:1fr;} }
.source-doc{
  display:block;background:var(--panel);border:1px solid var(--line-strong);border-radius:10px;
  overflow:hidden;text-decoration:none;transition:border-color .15s;
}
.source-doc:hover{border-color:var(--stamp-red);}
.source-doc img{display:block;width:100%;height:auto;border-bottom:1px solid var(--line-strong);}
.source-doc-label{
  display:block;padding:12px 16px;font-family:'Archivo',sans-serif;font-weight:600;font-size:14px;color:var(--ink);
}

/* ---- industries / prototype pipeline grid ---- */
.industry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
@media (max-width:900px){ .industry-grid{grid-template-columns:repeat(2,1fr);} }
@media (max-width:520px){ .industry-grid{grid-template-columns:1fr;} }
.industry-card{
  border:1px solid var(--line-strong);border-radius:10px;padding:20px;background:var(--panel);
}
.industry-card.live{border-color:var(--stamp-red);background:var(--stamp-red-bg);}
.industry-card .tag{
  font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:0.05em;
  text-transform:uppercase;color:var(--muted);
}
.industry-card.live .tag{color:var(--stamp-red);font-weight:600;}
.industry-card h4{font-family:'Archivo',sans-serif;font-size:15.5px;margin:8px 0 6px;}
.industry-card p{font-size:13px;color:var(--muted);margin:0;line-height:1.5;}

/* detailed industries grid (industries.html) */
.industry-detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
@media (max-width:700px){ .industry-detail-grid{grid-template-columns:1fr;} }
.industry-detail-grid .card.span-2{grid-column:1/-1;}
.industry-detail-grid .card p{margin-top:2px;}

/* ---- faq ---- */
.faq{display:flex;flex-direction:column;}
.faq-item{padding:20px 0;border-bottom:1px solid var(--line);}
.faq-item:first-child{padding-top:0;}
.faq-item:last-child{border-bottom:none;}
.faq-item h3{font-family:'Archivo',sans-serif;font-size:16px;margin:0 0 8px;}
.faq-item p{font-size:14.5px;line-height:1.6;color:var(--navy-2);margin:0;}

/* ---- closing CTA band ---- */
.closing-cta{background:var(--ink);color:#fff;}
.closing-cta .section-sub{color:#B9BBBD;}
.closing-cta h2{color:#fff;margin:0 0 8px;}
.closing-cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;}

/* ---- contact ---- */
.contact-layout{display:grid;grid-template-columns:1fr 1fr;gap:56px;}
@media (max-width:800px){ .contact-layout{grid-template-columns:1fr;gap:36px;} }
.contact-form{display:flex;flex-direction:column;gap:14px;}
.contact-form label{font-size:13px;font-weight:600;color:var(--navy-2);}
.contact-form input,.contact-form textarea{
  font-family:'Inter',sans-serif;font-size:14.5px;padding:11px 13px;
  border:1px solid var(--line-strong);border-radius:6px;background:#fff;color:var(--ink);
  width:100%;
}
.contact-form textarea{resize:vertical;min-height:110px;}
.contact-form input:focus,.contact-form textarea:focus{outline:2px solid var(--ink);outline-offset:1px;}
.contact-side .stat{margin-bottom:26px;}
.contact-side .stat .big{font-family:'Archivo',sans-serif;font-weight:800;font-size:30px;display:block;}
.contact-side .stat .lbl{font-size:13px;color:var(--muted);}
.form-note{font-size:12.5px;color:var(--muted);margin-top:4px;}

/* ---- footer ---- */
footer{padding:34px 0;}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;}
footer .wordmark{font-size:15px;}
footer .fine{font-size:12.5px;color:var(--muted);}

/* ---- current-prototype banner (home) ---- */
.prototype-banner{
  background:var(--stamp-red-bg);border:1px solid var(--stamp-red);border-radius:10px;
  padding:28px 32px;
}
.prototype-banner .eyebrow{margin-bottom:12px;}
.prototype-pipeline{
  font-family:'IBM Plex Mono',monospace;font-size:13.5px;line-height:1.9;
  color:var(--ink);margin:0 0 20px;
}
.prototype-pipeline .arrow{color:var(--stamp-red);font-weight:700;margin:0 4px;}

/* ---- who-is-this-for qualifier list ---- */
.qualify-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px;max-width:640px;}
.qualify-list li{font-size:15px;line-height:1.6;color:var(--navy-2);padding-left:28px;position:relative;}
.qualify-list li::before{content:"✓";position:absolute;left:0;color:var(--stamp-red);font-weight:700;}

/* ---- human-verification flow diagram (demo) ---- */
.verify-flow{display:flex;flex-direction:column;align-items:flex-start;max-width:520px;}
.verify-step{
  display:flex;align-items:center;gap:14px;width:100%;
  background:var(--panel);border:1px solid var(--line-strong);border-radius:8px;
  padding:14px 18px;font-size:14.5px;color:var(--ink);
}
.verify-step.highlight{border-color:var(--stamp-red);background:var(--stamp-red-bg);font-weight:600;}
.verify-step .vnum{
  font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--muted);
  width:20px;height:20px;border-radius:50%;border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.verify-step.highlight .vnum{border-color:var(--stamp-red);color:var(--stamp-red);}
.verify-arrow{color:var(--muted);font-size:16px;padding:4px 0 4px 28px;}

/* ---- shared note above industry grid (demo) ---- */
.grid-note{
  font-family:'IBM Plex Mono',monospace;font-size:11.5px;letter-spacing:0.03em;
  text-transform:uppercase;color:var(--muted);margin:-20px 0 24px;
}

/* ---- 5-column steps (pilot pipeline) ---- */
.steps.steps-5{grid-template-columns:repeat(5,1fr);}
@media (max-width:1000px){ .steps.steps-5{grid-template-columns:repeat(3,1fr);} }
@media (max-width:700px){ .steps.steps-5{grid-template-columns:repeat(2,1fr);} }
@media (max-width:480px){ .steps.steps-5{grid-template-columns:1fr;} }