@font-face{font-family:"Montserrat";src:url("fonts/Montserrat-VariableFont_wght.ttf") format("truetype");font-weight:100 900;font-display:swap}
@font-face{font-family:"JetBrains Mono";src:url("fonts/JetBrainsMono-VariableFont_wght.ttf") format("truetype");font-weight:100 800;font-display:swap}
html{-webkit-text-size-adjust:100%}body{margin:0}img{max-width:100%}
:root{
  --bg:#05070C; --surface:#0A0E17; --card:#10141F; --raised:#161B28; --hover:#1E2535;
  --line:#2A3246; --line-soft:#1E2535;
  --fg:#F2F4F8; --muted:#8892A6;
  --blue:#2E5CFF; --blue-hi:#4E7BFF; --blue-tint:46,92,255;
  --gold:#EDAA3C; --gold-hi:#F8C465; --gold-tint:237,170,60;
  --ok:#3DD68C;
  --f-sans:"Montserrat",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
  --r-md:8px; --r-lg:14px; --r-xl:22px; --r-full:999px;
  --ease:cubic-bezier(.2,.8,.2,1);
  color-scheme:dark;
}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#F3F4F8; --surface:#FFFFFF; --card:#FFFFFF; --raised:#F7F8FB; --hover:#EBEEF4;
    --line:#D5DAE4; --line-soft:#E2E6EE;
    --fg:#0A0E17; --muted:#555E72;
    --blue:#1F48E0; --blue-hi:#1F48E0; --blue-tint:31,72,224;
    --gold:#C98812; --gold-hi:#A86F0B; --gold-tint:201,136,18;
    --ok:#1E9E62;
    color-scheme:light;
  }
}
:root[data-theme="light"]{
  --bg:#F3F4F8; --surface:#FFFFFF; --card:#FFFFFF; --raised:#F7F8FB; --hover:#EBEEF4;
  --line:#D5DAE4; --line-soft:#E2E6EE;
  --fg:#0A0E17; --muted:#555E72;
  --blue:#1F48E0; --blue-hi:#1F48E0; --blue-tint:31,72,224;
  --gold:#C98812; --gold-hi:#A86F0B; --gold-tint:201,136,18;
  --ok:#1E9E62;
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{background:var(--bg);color:var(--fg);font-family:var(--f-sans);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
.wrap{max-width:1240px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
a{color:inherit}
:focus-visible{outline:2px solid var(--blue-hi);outline-offset:3px;border-radius:4px}
.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:28px 0}
.logo{height:22px;width:auto;color:var(--fg)}
.mark{display:inline-flex;align-items:center;gap:10px;font-family:var(--f-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.mark::before{content:"";width:16px;height:2px;background:currentColor}
.mark.gold{color:var(--gold-hi)}
.mark.blue{color:var(--blue-hi)}
.hero{padding-block:56px 40px;display:grid;gap:20px;max-width:880px}
h1{font-size:clamp(36px,6.4vw,76px);line-height:1.02;letter-spacing:-.03em;font-weight:700;margin:0;text-wrap:balance}
h1 .acc,h2 .acc{font-weight:300;color:var(--blue-hi)}
h1 .acc.g{color:var(--gold-hi)}
.lead{font-size:clamp(17px,1.9vw,20px);color:var(--muted);max-width:62ch;margin:0}
.lead strong{color:var(--fg);font-weight:600}
.diagram-sec{padding-block:24px 64px}
.diagram-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px 24px;margin-bottom:20px}
.diagram-head p{margin:0;color:var(--muted);font-size:14px;max-width:56ch}
.set{display:block;cursor:pointer;border-radius:var(--r-lg);border:1px solid var(--line);padding:14px;position:relative;transition:border-color .14s var(--ease),background-color .14s var(--ease)}
.set:hover,.set:focus-visible{border-color:var(--blue-hi)}
.lbl{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px;margin-bottom:12px}
.lbl b{font-weight:700;font-size:clamp(14px,1.6vw,17px);letter-spacing:-.01em}
.lbl span{font-family:var(--f-mono);font-size:11px;color:var(--muted);letter-spacing:.04em}
.set.ki{background:var(--surface);border-radius:var(--r-xl);padding:18px}
.ki-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2.3fr);gap:14px}
.set.sym{background:var(--raised);display:flex;flex-direction:column}
.set.ml{background:rgba(var(--blue-tint),.05)}
.set.nn{background:rgba(var(--blue-tint),.08)}
.set.dl{background:rgba(var(--blue-tint),.12)}
.set.gen{background:rgba(var(--blue-tint),.20);border-color:rgba(var(--blue-tint),.6)}
.set.gen .lbl b{color:var(--fg)}
.set.agent{grid-column:1 / -1;border:1.5px dashed rgba(var(--gold-tint),.75);background:rgba(var(--gold-tint),.06)}
.set.agent:hover,.set.agent:focus-visible{border-color:var(--gold-hi)}
.set.agent .lbl b{color:var(--gold-hi)}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font-family:var(--f-mono);font-size:11.5px;line-height:1.3;padding:5px 9px;border-radius:var(--r-full);border:1px solid var(--line);background:var(--card);color:var(--fg);white-space:nowrap}
.chip.dim{color:var(--muted)}
.nest-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:start}
.nest-row > .chips{justify-content:flex-end;max-width:260px}
.nest-row .lbl{margin-bottom:0}
.nest-row{margin-bottom:12px}
.sym-note{margin:auto 0 0;padding-top:16px;font-size:13px;color:var(--muted);max-width:34ch}
.agent-flow{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;font-size:13px;color:var(--muted)}
.agent-flow .chips{flex:1 1 280px}
.uses{font-family:var(--f-mono);font-size:11px;color:var(--gold-hi);letter-spacing:.04em}
.legend{display:flex;flex-wrap:wrap;gap:10px 24px;margin-top:16px;font-size:13px;color:var(--muted)}
.legend i{display:inline-block;width:22px;height:12px;border-radius:3px;vertical-align:-1px;margin-right:8px;border:1px solid var(--line)}
.legend .l1{background:rgba(var(--blue-tint),.2);border-color:rgba(var(--blue-tint),.6)}
.legend .l2{border:1.5px dashed rgba(var(--gold-tint),.8);background:rgba(var(--gold-tint),.06)}
.legend .l3{background:var(--raised)}
@media (max-width:760px){
  .ki-grid{grid-template-columns:minmax(0,1fr)}
  .set.sym{order:3}
  .nest-row{grid-template-columns:minmax(0,1fr)}
  .nest-row > .chips{justify-content:flex-start;max-width:none}
  .set{padding:10px}
  .set.ki{padding:12px}
}
.ex-sec{padding-block:8px 72px}
.ex{list-style:none;margin:20px 0 0;padding:0;border-top:1px solid var(--line)}
.ex li{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:12px 40px;align-items:center;padding:18px 0;border-bottom:1px solid var(--line)}
.ex li > div{display:grid;gap:4px}
.ex b{font-size:16px;font-weight:600}
.ex span{font-size:14px;color:var(--muted);max-width:52ch}
.path{margin:0;display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.path i{font-style:normal;font-family:var(--f-mono);font-size:12px;padding:5px 10px;border-radius:var(--r-full);border:1px solid var(--line);color:var(--muted);white-space:nowrap}
.path i.end{color:var(--fg);border-color:rgba(var(--blue-tint),.7);background:rgba(var(--blue-tint),.14)}
.path.gold i.end{border-color:rgba(var(--gold-tint),.75);background:rgba(var(--gold-tint),.1);color:var(--gold-hi)}
.path em{font-style:normal;font-family:var(--f-mono);color:var(--muted);font-size:13px}
@media (max-width:760px){.ex li{grid-template-columns:minmax(0,1fr)}}
.layers{display:grid;gap:20px;padding-bottom:72px}
h2{font-size:clamp(28px,4vw,44px);line-height:1.08;letter-spacing:-.025em;margin:0;text-wrap:balance}
.sec-intro{display:grid;gap:12px;margin-bottom:12px}
.layer{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(20px,3vw,32px);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);gap:24px 40px;scroll-margin-top:24px}
.layer:target,.layer.is-target{border-color:var(--blue-hi);box-shadow:0 0 0 3px rgba(var(--blue-tint),.18)}
.layer.agentic:target,.layer.agentic.is-target{border-color:var(--gold-hi);box-shadow:0 0 0 3px rgba(var(--gold-tint),.18)}
.layer header{display:grid;gap:10px;align-content:start}
.layer h3{margin:0;font-size:clamp(22px,2.6vw,30px);letter-spacing:-.02em;line-height:1.12}
.layer .en{font-family:var(--f-mono);font-size:12px;color:var(--muted)}
.layer .def{margin:0;font-size:16px}
.layer .rel{margin:0;font-size:14px;color:var(--muted)}
.terms{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);border-radius:var(--r-md);overflow:hidden;align-self:start}
.term{background:var(--card);padding:14px 16px;display:grid;gap:4px;min-width:0}
.term b{font-size:14px;font-weight:600}
.term span{font-size:13.5px;color:var(--muted);line-height:1.45}
.term.wide{grid-column:1 / -1}
@media (max-width:860px){.layer{grid-template-columns:minmax(0,1fr)}}
@media (max-width:520px){.terms{grid-template-columns:minmax(0,1fr)}}
.timeline-sec{padding-bottom:72px}
.tl-scroll{overflow-x:auto;margin-top:20px;padding-bottom:6px}
.tl{list-style:none;margin:0;padding:0;display:grid;grid-auto-flow:column;grid-auto-columns:minmax(160px,1fr);gap:0;min-width:1760px;position:relative}
.tl::before{content:"";position:absolute;left:0;right:0;top:34px;height:1px;background:var(--line)}
.tl li{padding:0 18px 0 0;display:grid;align-content:start;grid-template-rows:auto 22px auto;gap:6px}
.tl .y{font-family:var(--f-mono);font-size:20px;font-weight:500;color:var(--fg);font-variant-numeric:tabular-nums}
.tl .dot{width:9px;height:9px;border-radius:50%;background:var(--blue-hi);margin-top:4px;position:relative}
.tl li.g .dot{background:var(--gold-hi)}
.tl .t{font-size:13.5px;color:var(--muted);line-height:1.4}
.tl .t b{display:block;color:var(--fg);font-weight:600;font-size:14px;margin-bottom:2px}
.tl .who{display:block;margin-top:10px;padding-top:10px;border-top:1px solid var(--line-soft);font-family:var(--f-mono);font-size:11.5px;line-height:1.6;color:var(--fg)}
footer{border-top:1px solid var(--line);padding-block:28px 40px;display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;align-items:center;font-size:13px;color:var(--muted)}
footer .logo{height:16px}