/* ============================================================
   Audit Engine Pro — marketing site
   Design: ledger-grade, ink-on-paper, one authoritative accent.
   ============================================================ */
:root{
  --ink:#0F172A;
  --ink-soft:#26303F;
  --paper:#FBFAF7;
  --paper-2:#F3F0E9;
  --card:#FFFFFF;
  --accent:#1D4ED8;
  --accent-deep:#1E3A8A;
  --line:#E7E3DA;
  --line-strong:#D7D1C4;
  --muted:#5B6472;
  --good:#0E7C5A;
  --good-bg:#E7F4EE;
  --warn:#9A6A00;
  --warn-bg:#FBF3DF;
  --radius:14px;
  --maxw:1180px;
  --font-display:"Fraunces",Georgia,"Times New Roman",serif;
  --font-body:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--font-body);font-size:17px;line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:560;line-height:1.1;letter-spacing:-.01em;color:var(--ink)}
h2{font-size:clamp(1.8rem,3.6vw,2.7rem);margin:0 0 .5em}
h3{font-size:1.28rem;margin:0 0 .35em;letter-spacing:-.005em}
p{margin:0 0 1rem}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin:0 0 1rem;font-weight:500}
.muted{color:var(--muted)}
.center{text-align:center}

/* focus */
a:focus-visible,button:focus-visible{outline:2.5px solid var(--accent);outline-offset:3px;border-radius:4px}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(251,250,247,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:11px;font-weight:600;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(150deg,var(--accent),var(--accent-deep));color:#fff;display:grid;place-items:center;font-family:var(--font-display);font-size:1.1rem;font-weight:600}
.brand-name{font-size:1.02rem;letter-spacing:-.01em}
.nav-links{display:flex;gap:22px;margin-left:auto;align-items:center}
.nav-links a{color:var(--ink-soft);font-size:.93rem;font-weight:500}
.nav-links a:hover{color:var(--accent);text-decoration:none}
.nav-cta{background:var(--accent);color:#fff!important;padding:9px 16px;border-radius:9px;font-size:.9rem}
.nav-cta:hover{background:var(--accent-deep);text-decoration:none}
.nav-toggle{display:none;background:none;border:1px solid var(--line-strong);border-radius:8px;padding:8px 10px;cursor:pointer;margin-left:auto}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);margin:4px 0}
@media(max-width:900px){
  .nav-links{position:fixed;inset:62px 0 auto 0;flex-direction:column;background:var(--paper);border-bottom:1px solid var(--line);padding:18px 24px;gap:18px;display:none}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .nav-cta{align-self:flex-start}
}

/* ---------- hero ---------- */
.hero{padding:76px 0 40px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}
@media(max-width:960px){.hero-grid{grid-template-columns:1fr;gap:34px}}
.hero h1{font-size:clamp(2.4rem,5.4vw,3.9rem);margin:0 0 .35em;font-weight:600}
.hero .lead{font-size:1.2rem;color:var(--ink-soft);max-width:34ch}
.hero-accent{color:var(--accent)}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:10px;font-weight:600;font-size:.98rem;cursor:pointer;border:1px solid transparent;transition:transform .15s ease,background .15s ease}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-deep)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.hero-shot{border:1px solid var(--line-strong);border-radius:var(--radius);overflow:hidden;box-shadow:0 24px 60px -30px rgba(15,23,42,.4);background:#fff}
.hero-shot img{width:100%}

/* statement band (signature) */
.statement{background:var(--ink);color:#F5F4F0;padding:60px 0}
.statement .wrap{max-width:900px}
.statement .eyebrow{color:#8FB0FF}
.statement p{font-family:var(--font-display);font-size:clamp(1.5rem,3.2vw,2.15rem);line-height:1.28;margin:0;font-weight:400}
.statement .under{font-family:var(--font-body);font-size:1rem;color:#AEB6C4;margin-top:20px;max-width:60ch}
.ledger-line{color:#8FB0FF}

/* section rhythm */
section{padding:64px 0}
.section-head{max-width:60ch;margin-bottom:38px}
.section-head.lg{margin-bottom:46px}

/* split feature */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;padding:40px 0;border-top:1px solid var(--line)}
.feature:first-of-type{border-top:none}
.feature.rev .feature-media{order:2}
@media(max-width:900px){.feature{grid-template-columns:1fr;gap:26px}.feature.rev .feature-media{order:0}}
.feature-media{border:1px solid var(--line-strong);border-radius:var(--radius);overflow:hidden;box-shadow:0 18px 44px -28px rgba(15,23,42,.35);background:#fff}
.feature ul{list-style:none;padding:0;margin:1rem 0 0}
.feature li{padding-left:26px;position:relative;margin-bottom:.6rem;color:var(--ink-soft)}
.feature li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:2px;background:var(--accent)}

/* pipeline */
.pipe{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:8px;font-family:var(--font-mono);font-size:.82rem}
.pipe span{background:var(--paper-2);border:1px solid var(--line);border-radius:7px;padding:7px 12px;color:var(--ink-soft)}
.pipe i{color:var(--accent);font-style:normal;font-weight:700}

/* cards grid */
.grid{display:grid;gap:20px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.g3,.g4{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.g3,.g4,.g2{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.card h3{font-family:var(--font-body);font-weight:650;font-size:1.05rem}
.card p{font-size:.95rem;color:var(--muted);margin:0}
.card .k{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);display:block;margin-bottom:10px}

/* stat row */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
@media(max-width:720px){.stats{grid-template-columns:1fr 1fr}}
.stat{padding:26px;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
@media(max-width:720px){.stat{border-right:none;border-bottom:1px solid var(--line)}}
.stat .n{font-family:var(--font-display);font-size:2.3rem;font-weight:560;color:var(--ink);line-height:1}
.stat .l{font-size:.86rem;color:var(--muted);margin-top:8px}

/* module chips */
.chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:6px}
.chip{font-family:var(--font-mono);font-size:.8rem;background:#fff;border:1px solid var(--line-strong);border-radius:999px;padding:7px 14px;color:var(--ink-soft)}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
@media(max-width:760px){.gallery{grid-template-columns:1fr}}
.shot{border:1px solid var(--line-strong);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:0 14px 40px -30px rgba(15,23,42,.4);cursor:zoom-in;transition:transform .18s ease}
.shot:hover{transform:translateY(-3px)}
.shot img{width:100%;display:block;border-bottom:1px solid var(--line)}
.shot .cap{padding:13px 16px}
.shot .cap b{font-size:.95rem}
.shot .cap span{display:block;font-size:.85rem;color:var(--muted);margin-top:2px}

/* pills */
.pill{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;padding:5px 11px;border-radius:999px}
.pill.ok{background:var(--good-bg);color:var(--good)}
.pill.soon{background:var(--paper-2);color:var(--muted)}
.pill.dot::before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor}

/* architecture diagram */
.arch{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:34px}
.arch-flow{display:flex;flex-direction:column;gap:0;align-items:center;font-family:var(--font-body)}
.arch-node{width:min(460px,100%);text-align:center;border:1px solid var(--line-strong);border-radius:11px;padding:15px 18px;background:var(--paper);font-weight:600}
.arch-node small{display:block;font-weight:400;color:var(--muted);font-size:.84rem;margin-top:3px}
.arch-node.core{background:var(--ink);color:#fff;border-color:var(--ink)}
.arch-node.core small{color:#AEB6C4}
.arch-arrow{width:2px;height:26px;background:var(--line-strong)}
.arch-aside{display:flex;align-items:center;gap:14px;width:min(460px,100%);margin-top:20px;padding-top:20px;border-top:1px dashed var(--line-strong)}
.arch-aside .arch-node{width:100%;background:#fff;border-style:dashed}

/* connections status */
.conn{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:620px){.conn{grid-template-columns:1fr}}
.conn .card{display:flex;justify-content:space-between;align-items:flex-start;gap:14px}

/* CTA band */
.cta-band{background:linear-gradient(160deg,var(--accent-deep),var(--accent));color:#fff;border-radius:var(--radius);padding:52px;text-align:center}
.cta-band h2{color:#fff}
.cta-band p{color:#DCE4FF;max-width:52ch;margin:0 auto 26px}
.cta-band .btn-primary{background:#fff;color:var(--accent-deep)}
.cta-band .btn-primary:hover{background:#F0F4FF}
.cta-band .btn-ghost{color:#fff;border-color:rgba(255,255,255,.5)}
.cta-band .btn-ghost:hover{border-color:#fff;color:#fff}

/* footer */
footer{border-top:1px solid var(--line);padding:44px 0 30px;margin-top:20px}
.foot-grid{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;align-items:flex-start}
.foot-brand{max-width:38ch}
.foot-brand p{font-size:.9rem;color:var(--muted);margin-top:10px}
.foot-legal{font-family:var(--font-mono);font-size:.76rem;color:var(--muted);line-height:1.7;text-align:right}
@media(max-width:640px){.foot-legal{text-align:left}}
.foot-note{border-top:1px solid var(--line);margin-top:30px;padding-top:18px;font-size:.82rem;color:var(--muted)}

/* lightbox */
.lb{position:fixed;inset:0;background:rgba(15,23,42,.86);display:none;place-items:center;z-index:100;padding:30px;cursor:zoom-out}
.lb.open{display:grid}
.lb img{max-width:min(1100px,94vw);max-height:90vh;border-radius:10px;border:1px solid rgba(255,255,255,.15)}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}