/* ═══════════════════════════════════════════════════════════════════════
   MARK — shared design system for the interior pages.

   index.html still carries its own inline copy of this; it predates the
   file. Migrate it here when there's a reason to touch that <style> block,
   not before — the duplication is known, not accidental.
   ═══════════════════════════════════════════════════════════════════════ */

*{box-sizing:border-box;margin:0;padding:0;}
:root{
  --paper:#F5F1E8; --paper-deep:#EBE5D2; --paper-edge:#E0D9C2;
  --paper-shadow:rgba(20,17,13,0.04);
  --ink:#14110D; --ink-soft:#3A352D; --muted:#5C5650;
  --rule:rgba(20,17,13,0.10); --rule-strong:rgba(20,17,13,0.16);
  --accent:#C8330A; --accent-deep:#8A2306;
  --ease-out:cubic-bezier(.16,1,.3,1);
}
html{scroll-behavior:smooth;overflow-x:clip;}
body{
  background:var(--paper);color:var(--ink);
  font-family:'Alegreya',Georgia,serif;font-size:19px;line-height:1.6;
  overflow-x:clip;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}

.slate-stripe{
  position:fixed;top:0;left:0;right:0;height:14px;z-index:101;
  background-image:repeating-linear-gradient(-52deg,var(--ink) 0 12px,var(--paper) 12px 24px);
  border-bottom:1px solid var(--ink);
}

nav{
  position:fixed;top:14px;left:0;right:0;z-index:100;padding:18px 40px;
  display:flex;align-items:center;justify-content:space-between;
  border-bottom:1px solid transparent;
  transition:background-color .3s var(--ease-out),border-color .3s var(--ease-out),backdrop-filter .3s var(--ease-out);
}
nav.scrolled{background:rgba(245,241,232,.92);border-bottom-color:var(--rule);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);}
.nav-logo{
  display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);
  font-family:'Alegreya',Georgia,serif;font-weight:600;font-size:22px;
  letter-spacing:.02em;text-transform:uppercase;
}
.nav-logo svg.mark{width:26px;height:26px;border-radius:2px;}
.nav-links{display:flex;align-items:center;gap:30px;}
.nav-links a{
  font-family:'DM Mono',monospace;font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--ink-soft);text-decoration:none;transition:color .2s;
}
.nav-links a:hover{color:var(--accent);}
.nav-cta{
  background:var(--ink);color:var(--paper)!important;padding:10px 18px;
  transition:background-color .2s;
}
.nav-cta:hover{background:var(--accent-deep);}

section{padding:120px 60px;max-width:1180px;margin:0 auto;}
.section-label{
  font-family:'DM Mono',monospace;font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted);margin-bottom:20px;
}
.section-title{
  font-family:'Alegreya',Georgia,serif;font-weight:500;font-size:clamp(36px,4.6vw,60px);
  line-height:1.06;letter-spacing:-.022em;color:var(--ink);
}
.section-title em{font-style:italic;font-weight:400;color:var(--accent);}
.section-body{
  font-size:19px;line-height:1.68;color:var(--ink-soft);max-width:62ch;margin-top:26px;
}
.lede{font-size:22px;line-height:1.6;color:var(--ink);max-width:60ch;margin-top:28px;}

/* PAGE HEAD */
.page-head{padding:210px 60px 80px;max-width:1180px;margin:0 auto;}
.page-head .section-title{font-size:clamp(42px,6vw,78px);}
.page-kicker{
  font-family:'DM Mono',monospace;font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--accent);margin-bottom:26px;
}

/* PROSE */
.prose h3{
  font-family:'Alegreya',Georgia,serif;font-weight:600;font-size:27px;letter-spacing:-.012em;
  margin:56px 0 14px;color:var(--ink);
}
.prose p{font-size:18px;line-height:1.7;color:var(--ink-soft);max-width:64ch;margin-bottom:18px;}
.prose strong{color:var(--ink);font-weight:600;}
.prose code{
  font-family:'DM Mono',monospace;font-size:.86em;background:var(--paper-deep);
  padding:2px 6px;border:1px solid var(--rule);
}

/* NUMBERED DECISION / BELIEF ROWS */
.rows{margin-top:60px;border-top:1px solid var(--rule);}
.row{
  display:grid;grid-template-columns:92px 1fr;gap:36px;align-items:start;
  padding:38px 0;border-bottom:1px solid var(--rule);
}
.row-num{
  font-family:'Alegreya',Georgia,serif;font-style:italic;font-size:52px;line-height:.9;
  color:var(--accent);opacity:.85;letter-spacing:-.04em;
}
.row-title{
  font-family:'Alegreya',Georgia,serif;font-weight:600;font-size:25px;letter-spacing:-.01em;
  margin-bottom:12px;color:var(--ink);
}
.row-body{font-size:17px;line-height:1.68;color:var(--ink-soft);max-width:66ch;}
.row-body p + p{margin-top:14px;}
.row-tag{
  display:inline-block;margin-top:16px;font-family:'DM Mono',monospace;font-size:10px;
  letter-spacing:.1em;text-transform:uppercase;color:var(--muted);
  border:1px solid var(--rule-strong);padding:5px 10px;
}

/* PIPELINE */
.pipeline{margin-top:56px;display:flex;flex-direction:column;gap:0;}
.pipe-step{
  display:grid;grid-template-columns:56px 1fr;gap:26px;align-items:start;
  padding:24px 0;border-bottom:1px solid var(--rule);
}
.pipe-step:first-child{border-top:1px solid var(--rule);}
.pipe-n{
  font-family:'DM Mono',monospace;font-size:11px;letter-spacing:.1em;color:var(--accent);padding-top:5px;
}
.pipe-name{font-family:'Alegreya',Georgia,serif;font-weight:600;font-size:20px;color:var(--ink);}
.pipe-desc{font-size:16px;line-height:1.62;color:var(--ink-soft);margin-top:5px;max-width:62ch;}
.pipe-desc code{font-family:'DM Mono',monospace;font-size:13px;color:var(--ink);}

/* CALLOUT */
.callout{
  margin:56px 0;padding:32px 34px;background:var(--paper-deep);border-left:2px solid var(--accent);
}
.callout p{font-size:19px;line-height:1.62;color:var(--ink);max-width:62ch;margin:0;}
.callout cite{
  display:block;margin-top:14px;font-style:normal;font-family:'DM Mono',monospace;
  font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);
}

/* CTA + FOOTER */
.page-cta{
  text-align:center;background:var(--paper-deep);border-top:1px solid var(--rule);
  padding:100px 40px;max-width:none;
}
.btn-primary{
  display:inline-block;background:var(--ink);color:var(--paper);text-decoration:none;
  padding:16px 30px;font-family:'DM Mono',monospace;font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;transition:background-color .2s;
}
.btn-primary:hover{background:var(--accent-deep);}
footer{
  padding:40px 60px;border-top:1px solid var(--rule);background:var(--paper-deep);
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.footer-logo{
  display:inline-flex;align-items:center;gap:8px;color:var(--ink);text-decoration:none;
  font-family:'Alegreya',Georgia,serif;font-weight:600;font-size:18px;
  letter-spacing:.02em;text-transform:uppercase;
}
.footer-logo svg.mark{width:22px;height:22px;}
.footer-copy{
  font-size:11px;color:var(--muted);font-family:'DM Mono',monospace;letter-spacing:.06em;
  flex:1 1 auto;text-align:center;padding:0 28px;line-height:1.7;
}
.footer-office{display:inline-block;margin-top:5px;opacity:.8;}
.footer-email a{
  font-size:12px;color:var(--ink-soft);text-decoration:none;
  font-family:'DM Mono',monospace;letter-spacing:.06em;
}
.footer-email a:hover{color:var(--accent);}

@media(max-width:900px){
  nav{padding:14px 20px;}
  .nav-links{gap:16px;}
  .nav-links a:not(.nav-cta){display:none;}
  section{padding:80px 20px;}
  .page-head{padding:150px 20px 50px;}
  .row{grid-template-columns:1fr;gap:12px;padding:30px 0;}
  .row-num{font-size:40px;}
  .pipe-step{grid-template-columns:1fr;gap:8px;}
  footer{flex-direction:column;gap:14px;text-align:center;padding:32px 20px;}
  .footer-copy{padding:0;}
}