/* ===== TRACE8 — onyx / alabaster / cobalt · clinical, no gradients ===== */
:root{
  --onyx:#0b0d10;
  --onyx-2:#111418;
  --onyx-3:#171b21;
  --alabaster:#f6f7f5;
  --paper:#fcfcfb;
  --ink:#0b0d10;
  --ink-soft:#4a4f57;
  --ink-dim:#878d96;
  --line:rgba(11,13,16,.12);
  --line-d:rgba(255,255,255,.12);
  --cobalt:#1f53ff;
  --cobalt-soft:#dfe7ff;
  --emerald:#0f9d6b;
  --amber:#e8a33d;
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:'Inter',system-ui,sans-serif;font-weight:400;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:var(--cobalt);color:#fff}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:'Inter',sans-serif;font-weight:650;line-height:1.08;letter-spacing:-.025em}
.mono{font-family:'JetBrains Mono',ui-monospace,monospace}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 26px}
.eyebrow{font-family:'JetBrains Mono',monospace;font-size:12px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--cobalt);display:inline-flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--cobalt)}
.eyebrow.on-dark{color:#7fa0ff}.eyebrow.on-dark::before{background:#7fa0ff}

/* NAV */
header.nav{position:fixed;top:0;left:0;right:0;z-index:200;transition:.3s;border-bottom:1px solid transparent}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:16px 26px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.nav.scrolled{background:rgba(252,252,251,.9);backdrop-filter:blur(14px);border-bottom-color:var(--line)}
.nav.on-dark:not(.scrolled){border-bottom-color:var(--line-d)}
.logo{display:flex;align-items:center;gap:10px;font-family:'JetBrains Mono',monospace;font-weight:600;font-size:19px;letter-spacing:-.02em;color:var(--ink)}
.logo .mark{width:22px;height:22px;flex-shrink:0}
.logo .mark rect{fill:var(--cobalt)}
.nav.on-dark:not(.scrolled) .logo{color:#fff}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-size:14px;font-weight:500;color:var(--ink-soft);transition:.2s}
.nav-links a:hover,.nav-links a.active{color:var(--ink)}
.nav.on-dark:not(.scrolled) .nav-links a{color:rgba(255,255,255,.72)}
.nav.on-dark:not(.scrolled) .nav-links a:hover,.nav.on-dark:not(.scrolled) .nav-links a.active{color:#fff}
.btn{font-family:'Inter';font-weight:600;font-size:14px;padding:11px 20px;border-radius:4px;transition:.2s;cursor:pointer;display:inline-flex;align-items:center;gap:8px;white-space:nowrap;border:1.5px solid transparent}
.btn-primary{background:var(--cobalt);color:#fff}
.btn-primary:hover{background:#1a45d8}
.btn-ghost{border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink)}
.nav.on-dark:not(.scrolled) .btn-ghost{color:#fff;border-color:rgba(255,255,255,.3)}
.nav.on-dark:not(.scrolled) .btn-ghost:hover{border-color:#fff}
.menu-toggle{display:none;background:none;border:none;color:var(--ink);font-size:23px;cursor:pointer;z-index:210}
.nav.on-dark:not(.scrolled) .menu-toggle{color:#fff}

/* HERO */
.hero{position:relative;background:var(--onyx);color:#fff;padding:160px 0 100px;overflow:hidden;border-bottom:1px solid var(--line-d)}
.hero .grid-bg{position:absolute;inset:0;z-index: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:38px 38px;mask:radial-gradient(120% 80% at 80% 10%,#000,transparent 72%);-webkit-mask:radial-gradient(120% 80% at 80% 10%,#000,transparent 72%)}
.hero .scan{position:absolute;left:0;right:0;height:1px;background:var(--cobalt);opacity:.5;box-shadow:0 0 16px 1px var(--cobalt);z-index:1;animation:scan 7s linear infinite}
@keyframes scan{0%{top:-2%}100%{top:102%}}
.hero-inner{position:relative;z-index:2;max-width:920px}
.hero h1{font-size:clamp(38px,6vw,72px);font-weight:680;letter-spacing:-.03em;margin:22px 0 24px;line-height:1.02}
.hero h1 .accent{color:var(--cobalt)}
.hero .sub{font-size:clamp(17px,1.7vw,21px);color:rgba(255,255,255,.78);max-width:62ch;margin-bottom:30px;font-weight:400}
.hero-cta{display:flex;gap:13px;flex-wrap:wrap;align-items:center}
.hero .microcopy{margin-top:18px;font-family:'JetBrains Mono',monospace;font-size:12.5px;color:rgba(255,255,255,.5);letter-spacing:.01em}

/* page hero (inner) */
.phero{position:relative;background:var(--onyx);color:#fff;padding:158px 0 80px;overflow:hidden;border-bottom:1px solid var(--line-d)}
.phero .grid-bg{position:absolute;inset:0;z-index: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:38px 38px;mask:radial-gradient(120% 90% at 75% 0%,#000,transparent 75%);-webkit-mask:radial-gradient(120% 90% at 75% 0%,#000,transparent 75%)}
.phero-inner{position:relative;z-index:2;max-width:860px}
.phero h1{font-size:clamp(34px,5vw,60px);font-weight:680;letter-spacing:-.03em;margin:20px 0 20px}
.phero h1 .accent{color:var(--cobalt)}
.phero .sub{font-size:clamp(16px,1.6vw,20px);color:rgba(255,255,255,.78);max-width:64ch;font-weight:400}

/* sections */
.section{padding:96px 0}
.section.alt{background:var(--alabaster)}
.section.dark{background:var(--onyx);color:#fff}
.sec-head{max-width:720px;margin-bottom:54px}
.sec-head.center{margin:0 auto 54px;text-align:center}
.sec-head h2{font-size:clamp(28px,3.8vw,46px);font-weight:660;letter-spacing:-.025em;margin:14px 0 16px}
.sec-head p{color:var(--ink-soft);font-size:17px}
.section.dark .sec-head p{color:rgba(255,255,255,.72)}
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.06s}.d2{transition-delay:.12s}.d3{transition-delay:.18s}
.no-js .reveal{opacity:1;transform:none}

/* thesis: three pillars */
.pillars3{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line)}
.pillar3{padding:36px 32px;border-right:1px solid var(--line)}
.pillar3:last-child{border-right:none}
.pillar3 .pn{font-family:'JetBrains Mono';font-size:13px;color:var(--cobalt);font-weight:500}
.pillar3 h3{font-size:21px;margin:14px 0 12px;font-weight:640}
.pillar3 p{color:var(--ink-soft);font-size:15px}
.pillar3 .flip{margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);font-size:14.5px;color:var(--ink);font-weight:500}

/* pipeline schematic */
.pipeline{display:grid;grid-template-columns:repeat(8,1fr);gap:0;border:1px solid var(--line-d);background:var(--onyx-2)}
.pnode{padding:22px 16px;border-right:1px solid var(--line-d);position:relative;transition:.3s}
.pnode:last-child{border-right:none}
.pnode:hover{background:var(--onyx-3)}
.pnode .idx{font-family:'JetBrains Mono';font-size:11px;color:var(--cobalt);letter-spacing:.1em}
.pnode h4{font-size:15px;margin:10px 0 8px;color:#fff;font-weight:620}
.pnode p{font-size:12.5px;color:rgba(255,255,255,.62);line-height:1.5}
.pnode.challenge{background:rgba(31,83,255,.1)}
.pnode.challenge .idx{color:#7fa0ff}
.pipeline-cap{margin-top:18px;font-family:'JetBrains Mono';font-size:12.5px;color:var(--ink-dim);letter-spacing:.01em}
.section.dark .pipeline-cap{color:rgba(255,255,255,.55)}

/* zero-ingestion block */
.zero{display:grid;grid-template-columns:1.1fr 1fr;gap:50px;align-items:center}
.zero .big-zero{font-family:'JetBrains Mono';font-weight:600;font-size:clamp(60px,9vw,120px);color:var(--cobalt);line-height:.9;letter-spacing:-.04em}
.zero .big-zero span{display:block;font-size:15px;color:var(--ink-soft);letter-spacing:.04em;margin-top:16px;font-weight:400}
.section.dark .zero .big-zero span{color:rgba(255,255,255,.7)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line)}
.section.dark .steps{border-color:var(--line-d)}
.step{padding:32px;border-right:1px solid var(--line)}
.section.dark .step{border-right-color:var(--line-d)}
.step:last-child{border-right:none}
.step .sn{font-family:'JetBrains Mono';font-size:22px;color:var(--cobalt);font-weight:600}
.step h4{font-size:18px;margin:14px 0 10px;font-weight:620}
.step p{color:var(--ink-soft);font-size:14.5px}
.section.dark .step p{color:rgba(255,255,255,.7)}

/* proof metrics */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line)}
.metric{padding:34px 26px;border-right:1px solid var(--line)}
.metric:last-child{border-right:none}
.metric .mv{font-family:'JetBrains Mono';font-weight:600;font-size:clamp(30px,3.4vw,42px);color:var(--ink);letter-spacing:-.02em}
.metric .ml{font-size:13px;color:var(--ink-soft);margin-top:10px;line-height:1.45}
.metric .mu{font-size:11px;color:var(--ink-dim);margin-top:6px;font-family:'JetBrains Mono';letter-spacing:.04em}

/* agent roster */
.roster{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line)}
.agent{padding:32px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.agent:nth-child(2n){border-right:none}
.agent.adv{background:var(--cobalt);color:#fff}
.agent .anum{font-family:'JetBrains Mono';font-size:13px;color:var(--cobalt);font-weight:500;letter-spacing:.06em}
.agent.adv .anum{color:rgba(255,255,255,.9)}
.agent h3{font-size:20px;margin:8px 0 4px;font-weight:650}
.agent .arole{font-size:14px;color:var(--ink-dim);font-style:italic;margin-bottom:14px}
.agent.adv .arole{color:rgba(255,255,255,.85)}
.agent p{color:var(--ink-soft);font-size:14.5px;margin-bottom:16px}
.agent.adv p{color:rgba(255,255,255,.92)}
.agent .io{font-family:'JetBrains Mono';font-size:11.5px;color:var(--ink-dim);letter-spacing:.02em;padding-top:12px;border-top:1px dashed var(--line)}
.agent.adv .io{color:rgba(255,255,255,.8);border-top-color:rgba(255,255,255,.3)}

/* split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split .copy h2{font-size:clamp(26px,3.4vw,42px);margin-bottom:16px;font-weight:650}
.split .copy p{color:var(--ink-soft);font-size:16px;margin-bottom:14px}
.section.dark .split .copy p{color:rgba(255,255,255,.72)}
.flywheel{aspect-ratio:1/1;border:1px solid var(--line);position:relative;min-height:320px}
.section.dark .flywheel{border-color:var(--line-d)}

/* long-form agent walk blocks */
.walk{display:flex;flex-direction:column;gap:0;border:1px solid var(--line)}
.walk .wrow{padding:28px 32px;border-bottom:1px solid var(--line);display:grid;grid-template-columns:200px 1fr;gap:24px;align-items:start}
.walk .wrow:last-child{border-bottom:none}
.walk .wname{font-weight:650;font-size:17px}
.walk .wname .wtag{display:block;font-family:'JetBrains Mono';font-size:12px;color:var(--cobalt);font-style:normal;margin-top:4px;font-weight:500}
.walk .wbody{color:var(--ink-soft);font-size:15px}

/* CTA */
.cta{background:var(--onyx);color:#fff;padding:80px 0;text-align:center}
.cta h2{font-size:clamp(28px,4vw,48px);font-weight:660;letter-spacing:-.025em;margin-bottom:16px}
.cta p{font-size:17px;color:rgba(255,255,255,.74);max-width:52ch;margin:0 auto 28px}
.cta .cbtns{display:flex;gap:13px;justify-content:center;flex-wrap:wrap}

/* checklist */
.clist{list-style:none;display:flex;flex-direction:column;gap:12px}
.clist li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px}
.clist .tick{flex-shrink:0;width:20px;height:20px;border:1.5px solid var(--cobalt);border-radius:3px;display:flex;align-items:center;justify-content:center;color:var(--cobalt);font-size:11px;font-weight:700;margin-top:2px}
.section.dark .clist li{color:rgba(255,255,255,.85)}

/* callout strip */
.callout{border-left:3px solid var(--cobalt);padding:18px 24px;background:var(--alabaster);font-size:16px;font-weight:500}
.section.dark .callout{background:var(--onyx-2)}
.mono-stat{font-family:'JetBrains Mono';font-weight:600;font-size:clamp(20px,2.4vw,30px);letter-spacing:-.01em}
.mono-stat .accent{color:var(--cobalt)}

/* footer */
footer{background:var(--onyx);color:#fff;padding:64px 0 30px;border-top:1px solid var(--line-d)}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:34px;margin-bottom:44px}
.foot-grid .logo{color:#fff}
.foot-grid h5{font-family:'JetBrains Mono';font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.45);margin-bottom:15px}
.foot-grid ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.foot-grid a{color:rgba(255,255,255,.74);font-size:14px;transition:.2s}
.foot-grid a:hover{color:var(--cobalt)}
.foot-about p{color:rgba(255,255,255,.62);font-size:14px;margin-top:14px;max-width:34ch}
.foot-about .by{margin-top:14px;font-size:12.5px;color:rgba(255,255,255,.45)}
.foot-about .by a{color:rgba(255,255,255,.7)}
.foot-bottom{border-top:1px solid var(--line-d);padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:12.5px;color:rgba(255,255,255,.45)}
.foot-bottom a{color:rgba(255,255,255,.55)}

/* forms */
.form{border:1px solid var(--line);padding:32px;background:#fff}
.section.dark .form{background:var(--onyx-2);border-color:var(--line-d)}
.form h3{font-size:21px;margin-bottom:6px;font-weight:640}
.form .fsub{color:var(--ink-soft);font-size:14px;margin-bottom:20px}
.section.dark .form .fsub{color:rgba(255,255,255,.65)}
.field{margin-bottom:15px}
.field label{display:block;font-size:12.5px;font-weight:600;margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;padding:11px 13px;border:1.5px solid var(--line);border-radius:4px;font-family:inherit;font-size:14.5px;background:var(--paper);transition:.2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--cobalt)}
.field textarea{min-height:100px;resize:vertical}
.form .fnote{font-size:12px;color:var(--ink-dim);margin-top:8px;font-family:'JetBrains Mono'}

/* scroll progress */
.scroll-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--cobalt);z-index:300;transition:width .1s linear}

@media(max-width:980px){
  .pipeline{grid-template-columns:repeat(2,1fr)}
  .pnode{border-bottom:1px solid var(--line-d)}
}
@media(max-width:820px){
  .nav-links{position:fixed;inset:0;background:rgba(11,13,16,.97);backdrop-filter:blur(16px);flex-direction:column;justify-content:center;gap:26px;transform:translateX(100%);transition:.4s}
  .nav-links.open{transform:none}.nav-links a{font-size:20px;color:#fff!important}
  .menu-toggle{display:block}
  .pillars3,.steps,.metrics,.roster,.zero,.split{grid-template-columns:1fr}
  .pillar3,.step{border-right:none;border-bottom:1px solid var(--line)}
  .metric{border-right:none;border-bottom:1px solid var(--line)}
  .agent{border-right:none}
  .walk .wrow{grid-template-columns:1fr;gap:12px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .section{padding:64px 0}
  .hero,.phero{padding-top:128px}
}
@media(max-width:520px){.foot-grid{grid-template-columns:1fr}.metrics{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}