/* primordiagi.com. Same visual system as scout250.com: concrete ground, grain,
   tracked uppercase display, mono labels, numbered sections, spec rows. */
:root{
  --bg:#cfcfcc; --bg-2:#dbdbd8; --ink:#121212; --mid:#55554f; --paper:#e8e8e5; --night:#0e0e0e;
  --line:rgba(18,18,18,.16); --line-paper:rgba(232,232,229,.22); --accent:#ff7a2f;
  --sans:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --gutter:max(16px, env(safe-area-inset-left,0px), clamp(16px,4vw,56px));
  --gutter-r:max(16px, env(safe-area-inset-right,0px), clamp(16px,4vw,56px));
  --track:.14em;
  color-scheme:light;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-weight:400;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,figure,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
a:focus-visible{outline:2px solid currentColor;outline-offset:4px}
.grain{position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.5;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .5 0 0 0 0 .5 0 0 0 0 .49 0 0 0 .12 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

.mono{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:var(--track);text-transform:uppercase;line-height:1.4}
.display{font-weight:400;text-transform:uppercase;letter-spacing:.06em;line-height:.95;font-size:clamp(46px,9.4vw,152px);text-wrap:balance}
.display-s{font-weight:400;text-transform:uppercase;letter-spacing:.06em;line-height:1.02;font-size:clamp(28px,4.2vw,58px);text-align:right}
h3{font-size:17px;font-weight:500;letter-spacing:.01em;margin-bottom:6px}
.lede{font-size:clamp(17px,1.6vw,21px);line-height:1.55;max-width:38ch}
.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--accent);margin-right:10px;vertical-align:1px}

/* header */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px;padding:0 var(--gutter-r) 0 var(--gutter);background:var(--night);color:var(--paper);border-bottom:1px solid var(--line-paper)}
.wordmark{font-weight:500;letter-spacing:.32em;text-transform:uppercase;font-size:14px}
.top nav{display:flex;gap:28px}
.top nav a{opacity:.7}
.top nav a:hover{opacity:1}

.btn{display:inline-flex;align-items:center;justify-content:space-between;gap:28px;background:var(--ink);color:var(--bg);border:1px solid var(--ink);padding:16px 22px;font-size:13px;font-weight:500;letter-spacing:.08em;text-transform:uppercase;transition:background .2s,color .2s}
.btn .mono{color:inherit;opacity:.7}
.btn:hover{background:#2a2a2a}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--bg)}
.btn-ghost-paper{background:transparent;color:var(--paper);border-color:var(--paper)}
.btn-ghost-paper:hover{background:var(--paper);color:var(--ink)}
.btn.small{padding:10px 16px;font-size:11px}

/* Hero: the shared mind and its specialists. */
.hero{background:var(--night);color:var(--paper);padding:28px var(--gutter-r) 24px var(--gutter);overflow:hidden}
.hero-head,.hero-foot-row{display:flex;justify-content:space-between;gap:24px;color:#aaa9a3}
.hero-head{font-size:10px}
.hero-layout{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,64px);align-items:center;padding:64px 0 48px;max-width:1600px;margin:auto}
.hero-copy{min-width:0}
.hero .display{font-size:clamp(48px,6.6vw,106px);letter-spacing:.025em;line-height:1.02}
.hero .display span{color:var(--accent)}
.hero-copy .lede{font-size:clamp(16px,1.35vw,20px);color:#b8b8b2;max-width:36ch;margin:28px 0}
.hero-cta{background:var(--accent);border-color:var(--accent);color:var(--night);min-width:220px}
.hero-cta:hover{background:#ff9458;border-color:#ff9458}
.system-mobile{display:none}
.system{min-width:0;border-top:1px solid var(--line-paper);border-bottom:1px solid var(--line-paper)}
.system-heading{display:flex;justify-content:space-between;gap:12px;padding:16px 0;color:#aaa9a3;font-size:9px}
.system svg{display:block;width:100%;height:auto}
.orbits{fill:none;stroke:#e8e8e5;stroke-opacity:.18;stroke-width:1}
.orbits circle:first-child{stroke-dasharray:2 7}
.routes{fill:none;stroke:var(--accent);stroke-width:1.5;stroke-opacity:.8}
.signal{fill:var(--accent)}
.core{fill:#161412;stroke:var(--accent);stroke-width:1.5}
.core .core-inner{fill:none;stroke-opacity:.25;stroke-width:1}
.terminal{fill:#161616;stroke:#666660;stroke-width:1}
.system svg text{font-family:var(--mono);fill:var(--paper)}
.svg-overline{font-size:10px;letter-spacing:.8px}
.system svg .svg-prime{font-family:var(--sans);font-size:24px;font-weight:500;letter-spacing:1px}
.svg-label{font-size:13px;letter-spacing:1px}
.system svg .svg-detail{font-size:12px;fill:#b8b8b2}
.system figcaption{font-size:13px;line-height:1.6;color:#b8b8b2;padding:16px 0 20px}
.hero-foot-row{border-top:1px solid var(--line-paper);padding-top:20px;font-size:9px;align-items:center}
.hero-foot-row a{color:var(--paper);white-space:nowrap}
.statement-label{color:var(--mid);line-height:1.8}
section[id]{scroll-margin-top:88px}

/* statement */
.statement{padding:clamp(48px,7vw,104px) var(--gutter-r) 0 var(--gutter);border-bottom:1px solid var(--line)}
.statement h1{margin-bottom:clamp(24px,4vh,48px)}
.hero-foot{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:end;padding-bottom:clamp(28px,4vw,48px)}
.cta-row{display:flex;gap:12px;justify-content:flex-end;flex-wrap:wrap}
.ticker{display:flex;flex-wrap:wrap;gap:12px 0;border-top:1px solid var(--line);padding:18px 0 22px;color:var(--mid)}
.ticker li{padding-right:28px;margin-right:28px;border-right:1px solid var(--line)}
.ticker li:last-child{border:0;margin:0;padding:0}

/* sections */
.section{padding:clamp(56px,8vw,120px) var(--gutter-r) clamp(56px,8vw,120px) var(--gutter);border-bottom:1px solid var(--line)}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:clamp(28px,4vw,56px)}
.section-head>.mono{color:var(--mid);padding-bottom:10px}
.split{display:grid;grid-template-columns:1fr 1.25fr;gap:clamp(24px,5vw,80px);align-items:start}
.split .lede{color:var(--ink)}
.split .aside{display:grid;gap:20px;align-content:start}
.split .aside p:not(.lede){font-size:14.5px;line-height:1.65;color:var(--mid);max-width:46ch}

/* spec rows */
.spec{border-top:1px solid var(--line);min-width:0}
.spec>div{display:grid;grid-template-columns:minmax(120px,26%) 1fr;gap:20px;padding:18px 0;border-bottom:1px solid var(--line)}
.spec dt{color:var(--mid)}
.spec dd{text-transform:none;letter-spacing:0;font-size:14px;font-variant-numeric:tabular-nums}
.spec dd span{display:block;margin-top:6px;font-size:11.5px;color:var(--mid);line-height:1.55}
.spec dt .dot{margin-right:8px}
.dot.hollow{background:transparent;border:1px solid var(--mid)}
.dot.solid{background:var(--ink)}
.note{margin-top:22px;color:var(--mid);max-width:70ch;text-transform:none;letter-spacing:.02em;font-size:11.5px;line-height:1.6}
.ulink{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}

/* invariants: the dark band */
.dark{background:var(--ink);color:var(--paper);border-bottom:0}
.dark .section-head>.mono{color:rgba(232,232,229,.6)}
.rows{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--line-paper)}
.rows li{display:grid;gap:10px;align-content:start;padding:24px 20px 8px 0;min-width:0}
.rows li+li{padding-left:20px;border-left:1px solid var(--line-paper)}
.rows .mono{color:var(--accent)}
.rows p{font-size:14px;line-height:1.6;color:rgba(232,232,229,.72)}

.foot{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;padding:28px var(--gutter-r) 28px var(--gutter);border-top:1px solid var(--line);color:var(--mid)}
.foot .wordmark{color:var(--ink)}
.foot .addr{user-select:all;color:var(--ink)}

@media(max-width:900px){
  .top{height:auto;min-height:64px;flex-wrap:wrap;gap:12px;padding-top:14px;padding-bottom:12px}
  .top nav{display:flex;order:3;width:100%;gap:24px;overflow-x:auto;white-space:nowrap;padding:6px 0}
  .top nav a{padding:5px 0}
  section[id]{scroll-margin-top:126px}
  .hero-layout{gap:24px;padding-top:44px}
  .hero .display{font-size:clamp(44px,6.5vw,60px)}
  .hero-foot,.split{grid-template-columns:1fr;gap:24px}
  .cta-row{justify-content:flex-start}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px}
  .display-s{text-align:left}
  .rows{grid-template-columns:1fr 1fr}
  .rows li,.rows li+li{padding:20px 0;border-left:0;border-bottom:1px solid var(--line-paper)}
  .rows li:nth-child(even){padding-left:20px;border-left:1px solid var(--line-paper)}
}
@media(max-width:600px){
  .hide-s{display:none}
  .hero{padding-top:22px}
  .hero-layout{grid-template-columns:1fr;padding:36px 0 28px;gap:38px}
  .hero .display{font-size:clamp(44px,11vw,66px)}
  .hero-copy .lede{max-width:34ch}
  .hero-head{font-size:9px;letter-spacing:.09em}
  .hero-foot-row{flex-direction:column;align-items:flex-start;gap:14px;line-height:1.7}
  .system-heading{font-size:8px}
  .system svg{display:none}
  .system-mobile{display:block;padding:24px 0 8px}
  .mobile-core{display:grid;gap:8px;text-align:center;padding:26px 16px;border:1px solid var(--accent);background:radial-gradient(ellipse at center,rgba(255,122,47,.12),transparent)}
  .mobile-core strong{font-weight:400;font-size:30px;text-transform:uppercase;letter-spacing:.05em}
  .mobile-core>span:last-child{font-size:13px;color:#b8b8b2}
  .mobile-flow{font-size:8px;letter-spacing:.04em;text-align:center;color:var(--accent);padding:22px 0}
  .system-mobile dl{border-left:1px solid var(--accent);padding-left:18px}
  .system-mobile dl>div{padding:12px 0;border-bottom:1px solid var(--line-paper)}
  .system-mobile dt{font-size:12px;text-transform:uppercase;letter-spacing:.08em}
  .system-mobile dd{font-size:13px;color:#b8b8b2;margin-top:4px}
  .top nav{gap:22px;font-size:10px}
  .system figcaption{font-size:12px}
  .rows{grid-template-columns:1fr}
  .rows li:nth-child(even){padding-left:0;border-left:0}
  .spec>div{grid-template-columns:1fr;gap:6px}
  .ticker li{padding-right:14px;margin-right:14px}
}
.skip{position:fixed;left:12px;top:-80px;background:var(--ink);color:var(--bg);padding:12px 16px;z-index:100}
.skip:focus{top:12px}
.foot a:hover{color:var(--ink)}
.legal{max-width:760px;margin:0 auto;padding:clamp(48px,8vw,96px) var(--gutter-r) 64px var(--gutter)}
.legal .mono{color:var(--mid);display:block;margin-bottom:28px}
.legal h1{font-size:clamp(28px,4vw,44px);font-weight:400;text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px}
.legal p{font-size:15px;line-height:1.7;margin-bottom:16px}
.legal a{text-decoration:underline;text-underline-offset:3px}

/* Visual chapters: field intelligence, the learning loop, and the flight stack. */
.field-visual{align-self:center;color:var(--ink)}
.field-visual svg{display:block;width:100%;height:auto}
.terrain{fill:none;stroke:var(--ink);stroke-opacity:.22;stroke-width:1}
.field-route{fill:none;stroke:var(--ink);stroke-width:1.5;stroke-dasharray:5 6}
.field-range{fill:rgba(255,122,47,.18);stroke:var(--accent);stroke-width:1.5}
.field-machine{fill:var(--bg);stroke:var(--ink);stroke-width:2}
.field-visual figcaption{display:grid;gap:8px;border-top:1px solid var(--line);padding-top:18px;font-size:13px;color:var(--mid)}
.experience-visual{background:var(--night);color:var(--paper);padding:28px clamp(20px,3vw,40px)}
.visual-kicker{color:#aaa9a3;margin-bottom:28px;font-size:10px}
.experience-loop{display:grid;gap:0}
.experience-loop li{display:grid;grid-template-columns:44px 1fr 20px;gap:18px;position:relative;padding-bottom:26px}
.experience-loop li:last-child{padding-bottom:0}
.step-mark{position:relative;display:grid;place-items:center;width:44px;height:44px;border:1px solid var(--accent);border-radius:50%;font-family:var(--mono);font-size:12px;color:var(--accent)}
.experience-loop li:not(:last-child):before{content:"";position:absolute;top:44px;bottom:0;left:22px;width:1px;background:var(--accent);opacity:.35}
.experience-loop h3{font-weight:400;font-size:22px}
.experience-loop p{font-size:13px;line-height:1.6;color:#b8b8b2;max-width:37ch}
.flow-arrow{color:var(--accent);font-size:23px}
.experience-visual figcaption{border-top:1px solid var(--line-paper);margin-top:24px;padding-top:18px;color:#aaa9a3;font-size:9px}
.technical-details{margin-top:40px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.technical-details summary{padding:22px 0;cursor:pointer;font-size:17px}
.technical-details summary .mono{margin-left:24px;color:var(--mid);font-size:9px}
.technical-details summary:focus-visible{outline:2px solid var(--ink);outline-offset:4px}
.technical-details .spec{margin-bottom:24px}
.flight-visual{display:grid;grid-template-columns:1fr .7fr 1.15fr;align-items:center;gap:24px;background:var(--night);color:var(--paper);padding:32px clamp(20px,4vw,56px) 24px;margin-bottom:48px}
.flight-visual svg{display:block;width:100%;height:220px;fill:none;stroke:#b8b8b2;stroke-width:1.5;margin:24px 0}
.flight-visual .mono{font-size:10px;color:#aaa9a3}
.flight-visual h3{font-size:22px;font-weight:400}
.flight-visual p{font-size:13px;color:#b8b8b2}
.flight-visual .flight-path{stroke:var(--accent);stroke-width:2}
.flight-connection{text-align:center;display:grid;gap:8px}
.link-line{display:block;color:var(--accent);font-size:32px;line-height:1;border-bottom:1px solid var(--accent);text-align:right}
.link-line.return{text-align:left;border-color:#666660;color:#b8b8b2}
.flight-visual .safety-envelope{stroke:var(--accent);stroke-dasharray:4 7;opacity:.7}
.flight-visual .frame{stroke-width:12;stroke:#666660}
.flight-visual .aircraft-body{fill:#272421;stroke:var(--accent)}
.flight-visual figcaption{grid-column:1/-1;border-top:1px solid var(--line-paper);padding-top:20px;margin-top:10px;display:flex;justify-content:space-between;gap:16px;font-size:13px;color:#b8b8b2}
.flight-stack{display:grid;border-top:1px solid var(--line)}
.flight-stack>div{position:relative;padding:24px 120px 24px 0;border-bottom:1px solid var(--line)}
.flight-stack .mono{color:var(--mid);font-size:9px;display:block;margin-bottom:10px}
.flight-stack h3{font-size:24px;font-weight:400}
.flight-stack p{font-size:13px;color:var(--mid)}
.stack-metric,.stack-symbol,.record-wave{position:absolute;right:0;top:50%;transform:translateY(-50%);font-size:44px;line-height:1;font-weight:300}
.stack-metric small{font-size:18px}
.record-wave{font-size:18px;letter-spacing:1px;color:var(--mid)}
.rule-icon{width:52px;height:52px;margin-bottom:16px;fill:none;stroke:var(--accent);stroke-width:1.25}
.roadmap-track{display:grid;grid-template-columns:repeat(5,1fr);gap:0}
.roadmap-track>div{position:relative;padding:30px 24px 0 0;border-top:1px solid var(--mid)}
.roadmap-track>div:before{content:"";position:absolute;left:0;top:-5px;width:9px;height:9px;border-radius:50%;background:var(--bg);border:1px solid var(--mid)}
.roadmap-track>div:first-child:before{background:var(--accent);border-color:var(--accent)}
.roadmap-track dt{font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:var(--mid);min-height:38px}
.roadmap-track dt .dot{display:none}
.roadmap-track dd{font-size:21px;line-height:1.3;max-width:20ch}
.roadmap-track dd span{display:block;font-size:13px;line-height:1.6;color:var(--mid);margin-top:16px}
@media(max-width:900px){
  .field-visual{max-width:600px;width:100%}
  .roadmap-track{grid-template-columns:1fr}
  .roadmap-track>div{border-top:0;border-left:1px solid var(--mid);padding:0 0 32px 28px}
  .roadmap-track>div:before{left:-5px;top:3px}
  .roadmap-track dt{min-height:0;margin-bottom:12px}
  .roadmap-track dd{max-width:40ch}
  .roadmap-track dd span{margin-top:10px}
  .flight-visual{gap:18px;grid-template-columns:1fr .6fr 1fr}
  .flight-visual svg{height:160px}
  .flight-visual figcaption{flex-direction:column}
}
@media(max-width:600px){
  .flight-visual{grid-template-columns:1fr;padding:24px}
  .flight-visual svg{height:190px;margin:16px 0}
  .flight-connection{padding:14px 0;grid-template-columns:1fr 32px;align-items:center;text-align:left;border-top:1px solid var(--line-paper);border-bottom:1px solid var(--line-paper)}
  .flight-connection .link-line{border:0;transform:rotate(90deg);text-align:center}
  .flight-connection .return{grid-column:2;grid-row:2}
  .flight-visual figcaption{font-size:12px}
  .experience-loop li{gap:12px;grid-template-columns:38px 1fr 16px}
  .step-mark{width:38px;height:38px}
  .experience-loop li:not(:last-child):before{left:19px;top:38px}
  .experience-loop h3{font-size:20px}
  .technical-details summary .mono{display:block;margin:10px 0 0 18px;line-height:1.7}
  .flight-stack>div{padding-right:96px}
  .stack-metric,.stack-symbol{font-size:36px}
  .record-wave{font-size:14px}
  .rule-icon{width:42px;height:42px;margin:0}
}