:root{
    --bg:#0A1826; --bg2:#0C1E30; --surface:#0F2236; --surface2:#123049;
    --ink:#E9EFF5; --ink-dim:#B9CCDD; --muted:#7E99B0; --faint:#2A455F;
    --wire:#4FB8D8; --wire-dim:#2E6E88; --accent:#F0A93B; --accent-deep:#C77C1E;
    --ok:#54B981; --rep:#E0A94A; --bad:#E76E6E;
    --grid:rgba(79,184,216,.05); --gridln:rgba(79,184,216,.09);
    --card:#102639; --card-line:#20415E; --shadow:0 12px 40px -18px rgba(0,0,0,.7);
    --maxw:78rem; --read:44rem;
    --sans:-apple-system,"Segoe UI Variable","Segoe UI",system-ui,Roboto,sans-serif;
    --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;
    --mono:ui-monospace,"SF Mono","JetBrains Mono","Cascadia Code",Menlo,monospace;
  }
  @media (prefers-color-scheme: light){
    :root{
      --bg:#E7ECF1; --bg2:#DFE6ED; --surface:#FBFCFD; --surface2:#F1F5F8;
      --ink:#122839; --ink-dim:#33506A; --muted:#5B7590; --faint:#C3D2DE;
      --wire:#1E6FA8; --wire-dim:#7FAECB; --accent:#C77C1E; --accent-deep:#9A5E12;
      --ok:#2E8B57; --rep:#B27A16; --bad:#C6413F;
      --grid:rgba(30,111,168,.045); --gridln:rgba(30,111,168,.10);
      --card:#FFFFFF; --card-line:#D6E0E9; --shadow:0 12px 34px -20px rgba(20,50,80,.35);
    }
  }
  :root[data-theme="dark"]{
    --bg:#0A1826; --bg2:#0C1E30; --surface:#0F2236; --surface2:#123049;
    --ink:#E9EFF5; --ink-dim:#B9CCDD; --muted:#7E99B0; --faint:#2A455F;
    --wire:#4FB8D8; --wire-dim:#2E6E88; --accent:#F0A93B; --accent-deep:#C77C1E;
    --ok:#54B981; --rep:#E0A94A; --bad:#E76E6E;
    --grid:rgba(79,184,216,.05); --gridln:rgba(79,184,216,.09);
    --card:#102639; --card-line:#20415E; --shadow:0 12px 40px -18px rgba(0,0,0,.7);
  }
  :root[data-theme="light"]{
    --bg:#E7ECF1; --bg2:#DFE6ED; --surface:#FBFCFD; --surface2:#F1F5F8;
    --ink:#122839; --ink-dim:#33506A; --muted:#5B7590; --faint:#C3D2DE;
    --wire:#1E6FA8; --wire-dim:#7FAECB; --accent:#C77C1E; --accent-deep:#9A5E12;
    --ok:#2E8B57; --rep:#B27A16; --bad:#C6413F;
    --grid:rgba(30,111,168,.045); --gridln:rgba(30,111,168,.10);
    --card:#FFFFFF; --card-line:#D6E0E9; --shadow:0 12px 34px -20px rgba(20,50,80,.35);
  }

  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0; background:var(--bg); color:var(--ink);
    font-family:var(--serif); font-size:18px; line-height:1.68;
    -webkit-font-smoothing:antialiased;
    background-image:
      linear-gradient(var(--gridln) 1px,transparent 1px),
      linear-gradient(90deg,var(--gridln) 1px,transparent 1px);
    background-size:34px 34px; background-position:center top;
  }
  @media (max-width:640px){ body{font-size:16.5px} }

  .wrap{max-width:var(--maxw); margin:0 auto; padding:0 clamp(1.1rem,4vw,3rem)}
  .read{max-width:var(--read)}
  h1,h2,h3,.eyebrow,.mono,.stat,.chip,.tag,.btn,nav,th{font-family:var(--sans)}
  .mono,.eyebrow,.tag,.stat-num,.leg,.node-lbl{font-family:var(--mono)}

  .eyebrow{font-family:var(--mono); font-size:.72rem; letter-spacing:.24em; text-transform:uppercase; color:var(--accent); font-weight:600}

  /* ---- top bar ---- */
  header.bar{position:sticky; top:0; z-index:50; backdrop-filter:blur(10px);
    background:color-mix(in srgb,var(--bg) 82%,transparent);
    border-bottom:1px solid var(--faint)}
  .bar-in{display:flex; align-items:center; gap:1rem; justify-content:space-between; padding:.6rem clamp(1.1rem,4vw,3rem); max-width:var(--maxw); margin:0 auto}
  .brand{display:flex; align-items:center; gap:.6rem; font-family:var(--mono); font-size:.82rem; letter-spacing:.02em; color:var(--ink)}
  .brand b{color:var(--accent)}
  .dot{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 0 var(--accent); animation:pulse 2.6s infinite}
  @keyframes pulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 60%,transparent)}70%{box-shadow:0 0 0 8px transparent}100%{box-shadow:0 0 0 0 transparent}}
  nav.toc{display:flex; gap:.2rem; flex-wrap:wrap}
  nav.toc a{font-family:var(--mono); font-size:.7rem; letter-spacing:.06em; text-transform:uppercase; color:var(--muted); text-decoration:none; padding:.34rem .5rem; border-radius:6px}
  nav.toc a:hover{color:var(--ink); background:var(--surface2)}
  @media (max-width:900px){ nav.toc{display:none} }
  .themebtn{font-family:var(--mono); font-size:.72rem; color:var(--ink-dim); background:var(--surface2); border:1px solid var(--card-line); padding:.4rem .6rem; border-radius:7px; cursor:pointer}
  .themebtn:hover{border-color:var(--accent); color:var(--accent)}
  .themebtn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--accent); outline-offset:2px}

  /* ---- hero ---- */
  .hero{position:relative; padding:clamp(2.5rem,7vw,5.5rem) 0 clamp(1.5rem,4vw,3rem)}
  .hero-grid{display:grid; grid-template-columns:1.05fr .95fr; gap:clamp(1.5rem,4vw,3rem); align-items:center}
  @media (max-width:860px){ .hero-grid{grid-template-columns:1fr} }
  h1{font-size:clamp(2.1rem,5.6vw,4.1rem); line-height:1.02; margin:.8rem 0 .4rem; font-weight:800; letter-spacing:-.02em; text-wrap:balance}
  h1 .g{color:var(--accent)}
  .lede{font-size:clamp(1.05rem,2.2vw,1.28rem); color:var(--ink-dim); max-width:34rem; line-height:1.55}
  .hero-meta{display:flex; gap:1.4rem; flex-wrap:wrap; margin-top:1.4rem; font-family:var(--mono); font-size:.74rem; color:var(--muted); letter-spacing:.04em}
  .hero-meta b{color:var(--wire); font-weight:600}
  .canvas-frame{position:relative; aspect-ratio:1/.92; border:1px solid var(--card-line); border-radius:14px; background:
    radial-gradient(120% 120% at 70% 20%, var(--surface2), var(--surface) 70%); overflow:hidden; box-shadow:var(--shadow)}
  .canvas-frame::before{content:"agent · loop"; position:absolute; top:.6rem; left:.8rem; font-family:var(--mono); font-size:.64rem; letter-spacing:.2em; text-transform:uppercase; color:var(--muted); z-index:2}
  .canvas-frame canvas{position:absolute; inset:0; width:100%; height:100%}

  /* ---- stat band ---- */
  .band{background:var(--surface); border-top:1px solid var(--faint); border-bottom:1px solid var(--faint); margin-top:2rem}
  .band-in{display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--faint)}
  @media (max-width:760px){ .band-in{grid-template-columns:repeat(2,1fr)} }
  .stat{background:var(--surface); padding:1.5rem clamp(1rem,3vw,2rem)}
  .stat-num{font-size:clamp(1.9rem,4.5vw,2.9rem); font-weight:700; color:var(--accent); line-height:1; font-variant-numeric:tabular-nums; letter-spacing:-.01em}
  .stat-lbl{font-family:var(--sans); font-size:.82rem; color:var(--ink-dim); margin-top:.5rem; line-height:1.35}
  .stat-tag{font-family:var(--mono); font-size:.62rem; letter-spacing:.14em; text-transform:uppercase; margin-top:.5rem}

  /* ---- sections ---- */
  section{padding:clamp(3rem,7vw,5.5rem) 0; border-bottom:1px solid var(--faint)}
  .sec-head{display:flex; align-items:baseline; gap:1rem; margin-bottom:1.6rem}
  .sec-num{font-family:var(--mono); font-size:.9rem; color:var(--accent); font-weight:600}
  h2{font-size:clamp(1.5rem,3.4vw,2.35rem); font-weight:800; margin:.2rem 0 0; letter-spacing:-.015em; text-wrap:balance; line-height:1.08}
  .sec-sub{color:var(--muted); font-size:.98rem; max-width:var(--read); margin:.7rem 0 0}
  p{max-width:var(--read)}
  p a,li a{color:var(--wire); text-underline-offset:3px}

  /* ---- confidence chips ---- */
  .chip{display:inline-flex; align-items:center; gap:.4rem; font-family:var(--mono); font-size:.66rem; font-weight:600; letter-spacing:.08em; text-transform:uppercase; padding:.24rem .55rem; border-radius:999px; border:1px solid; white-space:nowrap; vertical-align:middle}
  .chip::before{content:""; width:7px; height:7px; border-radius:50%; background:currentColor}
  .c-ok{color:var(--ok); border-color:color-mix(in srgb,var(--ok) 45%,transparent); background:color-mix(in srgb,var(--ok) 12%,transparent)}
  .c-rep{color:var(--rep); border-color:color-mix(in srgb,var(--rep) 45%,transparent); background:color-mix(in srgb,var(--rep) 12%,transparent)}
  .c-bad{color:var(--bad); border-color:color-mix(in srgb,var(--bad) 45%,transparent); background:color-mix(in srgb,var(--bad) 12%,transparent)}

  .legend{display:grid; grid-template-columns:repeat(3,1fr); gap:1rem; margin-top:1.4rem}
  @media (max-width:760px){ .legend{grid-template-columns:1fr} }
  .legend .lc{background:var(--card); border:1px solid var(--card-line); border-radius:12px; padding:1.1rem 1.2rem}
  .legend .lc p{font-size:.9rem; color:var(--ink-dim); margin:.6rem 0 0; line-height:1.5}

  /* ---- claim cards ---- */
  .claims{display:grid; gap:.9rem; margin-top:1.5rem}
  .claim{background:var(--card); border:1px solid var(--card-line); border-left:3px solid var(--faint); border-radius:10px; padding:1rem 1.2rem; display:flex; gap:1rem; align-items:flex-start}
  .claim.ok{border-left-color:var(--ok)} .claim.rep{border-left-color:var(--rep)} .claim.bad{border-left-color:var(--bad)}
  .claim .body{flex:1; min-width:0}
  .claim .body p{margin:.45rem 0 0; font-size:.96rem; color:var(--ink-dim); max-width:none; line-height:1.55}
  .claim .body strong{color:var(--ink); font-weight:700}

  /* ---- reveal ---- */
  .reveal{opacity:0; transform:translateY(18px); transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
  .reveal.in{opacity:1; transform:none}
  @media (prefers-reduced-motion:reduce){ .reveal{opacity:1; transform:none; transition:none} .dot{animation:none} .spark{display:none} }

  /* ---- six layer stack ---- */
  .stack{display:flex; flex-direction:column; gap:.55rem; margin-top:1.7rem}
  .layer{position:relative; display:grid; grid-template-columns:2.4rem 1fr auto; align-items:center; gap:1rem; padding:1rem 1.2rem; border-radius:11px; background:linear-gradient(90deg,var(--surface2),var(--surface)); border:1px solid var(--card-line); cursor:default; transition:transform .35s cubic-bezier(.2,.7,.2,1),border-color .3s,box-shadow .3s}
  .layer:hover{transform:translateX(8px); border-color:var(--accent); box-shadow:var(--shadow)}
  .layer .ln{font-family:var(--mono); font-size:1.1rem; color:var(--accent); font-weight:700}
  .layer .lt{font-family:var(--sans); font-weight:700; font-size:1.02rem}
  .layer .ld{font-family:var(--mono); font-size:.72rem; color:var(--muted); margin-top:.25rem; letter-spacing:.01em; line-height:1.4}
  .layer .tools{font-family:var(--mono); font-size:.68rem; color:var(--wire); text-align:right; max-width:16rem}
  @media (max-width:640px){ .layer{grid-template-columns:2rem 1fr} .layer .tools{display:none} }

  /* ---- generic diagram panel ---- */
  .panel{background:var(--surface); border:1px solid var(--card-line); border-radius:14px; padding:clamp(1.3rem,3vw,2.2rem); margin-top:1.6rem; box-shadow:var(--shadow); overflow:hidden}
  .panel-t{font-family:var(--mono); font-size:.68rem; letter-spacing:.2em; text-transform:uppercase; color:var(--muted); margin-bottom:1.2rem}

  /* MCP / A2A topology */
  .topo{position:relative}
  .topo svg{width:100%; height:auto; display:block; overflow:visible}
  .topo .lbl{font-family:var(--mono); font-size:11px; fill:var(--muted)}

  /* ---- bars (obs vs eval) ---- */
  .bars{display:flex; flex-direction:column; gap:1.5rem; margin-top:.5rem}
  .barrow{display:grid; grid-template-columns:9rem 1fr; gap:1rem; align-items:center}
  @media (max-width:560px){ .barrow{grid-template-columns:1fr} }
  .barrow .k{font-family:var(--mono); font-size:.78rem; color:var(--ink-dim)}
  .track{position:relative; height:34px; background:var(--surface2); border-radius:7px; border:1px solid var(--card-line); overflow:hidden}
  .fill{position:absolute; inset:0 auto 0 0; width:0; border-radius:6px; transition:width 1.4s cubic-bezier(.2,.8,.2,1); display:flex; align-items:center; justify-content:flex-end; padding-right:.6rem}
  .fill span{font-family:var(--mono); font-size:.78rem; font-weight:700; color:#08131f}
  .fill.a{background:linear-gradient(90deg,var(--wire-dim),var(--wire))}
  .fill.b{background:linear-gradient(90deg,var(--accent-deep),var(--accent))}
  .gapnote{margin-top:1.3rem; font-family:var(--mono); font-size:.76rem; color:var(--bad); display:flex; align-items:center; gap:.5rem}

  /* funnel */
  .funnel{display:flex; flex-direction:column; gap:.5rem; align-items:center; margin-top:.5rem}
  .frow{position:relative; height:52px; display:flex; align-items:center; justify-content:center; border-radius:8px; color:#08131f; font-family:var(--mono); font-weight:700; font-size:.86rem; background:linear-gradient(90deg,var(--wire),var(--accent)); transition:width 1.2s cubic-bezier(.2,.8,.2,1); width:12%; overflow:hidden; white-space:nowrap}
  .frow .fl{color:#08131f}
  .frow.sm{font-size:.72rem}

  /* timeline */
  .tl{position:relative; margin-top:1.8rem; padding-left:0}
  .tl::before{content:""; position:absolute; left:0; right:0; top:14px; height:2px; background:linear-gradient(90deg,var(--wire-dim),var(--wire),var(--accent)); border-radius:2px}
  .tl-track{display:flex; gap:0; overflow-x:auto; padding-bottom:.8rem; scrollbar-width:thin}
  .tl-item{min-width:11rem; flex:1; position:relative; padding:2.2rem .6rem 0}
  .tl-item::before{content:""; position:absolute; top:9px; left:.6rem; width:12px; height:12px; border-radius:50%; background:var(--accent); border:3px solid var(--bg); box-shadow:0 0 0 1px var(--accent)}
  .tl-date{font-family:var(--mono); font-size:.68rem; color:var(--accent); letter-spacing:.06em}
  .tl-txt{font-family:var(--sans); font-size:.82rem; color:var(--ink-dim); margin-top:.3rem; line-height:1.35}

  /* case study cards */
  .cases{display:grid; grid-template-columns:repeat(3,1fr); gap:1rem; margin-top:1.6rem}
  @media (max-width:820px){ .cases{grid-template-columns:repeat(2,1fr)} }
  @media (max-width:520px){ .cases{grid-template-columns:1fr} }
  .case{background:var(--card); border:1px solid var(--card-line); border-radius:12px; padding:1.3rem; transition:transform .3s,border-color .3s}
  .case:hover{transform:translateY(-4px); border-color:var(--wire)}
  .case .co{font-family:var(--mono); font-size:.7rem; letter-spacing:.14em; text-transform:uppercase; color:var(--wire)}
  .case .cbig{font-family:var(--sans); font-size:1.9rem; font-weight:800; color:var(--accent); margin:.5rem 0 .1rem; font-variant-numeric:tabular-nums; letter-spacing:-.01em}
  .case .cd{font-family:var(--serif); font-size:.9rem; color:var(--ink-dim); line-height:1.45}

  /* cost split */
  .cost{display:grid; grid-template-columns:1.2fr 1fr; gap:1.6rem; align-items:center; margin-top:1.6rem}
  @media (max-width:720px){ .cost{grid-template-columns:1fr} }
  .costbar{height:64px; display:flex; border-radius:10px; overflow:hidden; border:1px solid var(--card-line)}
  .costbar .seg{display:flex; align-items:center; justify-content:center; font-family:var(--mono); font-size:.72rem; font-weight:700; color:#08131f; transition:flex-grow 1.2s ease}
  .cost ul{list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:.7rem}
  .cost li{font-family:var(--mono); font-size:.82rem; color:var(--ink-dim); display:flex; justify-content:space-between; gap:1rem; border-bottom:1px dashed var(--card-line); padding-bottom:.5rem}
  .cost li b{color:var(--ok)}

  /* frameworks table */
  .tablewrap{overflow-x:auto; margin-top:1.6rem; border:1px solid var(--card-line); border-radius:12px}
  table{border-collapse:collapse; width:100%; min-width:44rem; font-size:.88rem}
  th,td{text-align:left; padding:.85rem 1rem; border-bottom:1px solid var(--card-line); vertical-align:top}
  th{font-family:var(--mono); font-size:.68rem; letter-spacing:.1em; text-transform:uppercase; color:var(--muted); background:var(--surface2); position:sticky; top:0}
  td{font-family:var(--serif); color:var(--ink-dim)}
  td:first-child{font-family:var(--sans); font-weight:700; color:var(--ink); white-space:nowrap}
  tr:hover td{background:color-mix(in srgb,var(--accent) 4%,transparent)}

  /* myths */
  .myths{display:grid; grid-template-columns:repeat(2,1fr); gap:1rem; margin-top:1.6rem}
  @media (max-width:680px){ .myths{grid-template-columns:1fr} }
  .myth{background:var(--card); border:1px solid var(--card-line); border-radius:11px; padding:1.1rem 1.2rem; position:relative}
  .myth .m1{font-family:var(--serif); font-size:.98rem; color:var(--muted); text-decoration:line-through; text-decoration-color:color-mix(in srgb,var(--bad) 70%,transparent); text-decoration-thickness:2px}
  .myth .m2{font-family:var(--sans); font-size:.86rem; color:var(--ink-dim); margin-top:.6rem; line-height:1.5}
  .myth .m2 b{color:var(--bad)}

  /* gaps */
  .gaps{display:grid; grid-template-columns:repeat(2,1fr); gap:1rem; margin-top:1.5rem}
  @media (max-width:680px){ .gaps{grid-template-columns:1fr} }
  .gap{background:var(--surface2); border:1px dashed var(--card-line); border-radius:11px; padding:1.1rem 1.2rem; font-size:.92rem; color:var(--ink-dim)}
  .gap b{font-family:var(--mono); font-size:.72rem; color:var(--accent); display:block; letter-spacing:.1em; text-transform:uppercase; margin-bottom:.4rem}

  ul.plain{padding-left:1.1rem; max-width:var(--read)}
  ul.plain li{margin:.5rem 0; color:var(--ink-dim); font-size:.98rem}
  ul.plain li::marker{color:var(--wire)}

  footer{padding:3rem 0 4rem; color:var(--muted); font-family:var(--mono); font-size:.76rem; line-height:1.7}
  footer .wrap{max-width:var(--read)}
  footer b{color:var(--ink-dim)}
  .hr{height:1px;background:var(--faint);margin:0}

  /* ===== INFRASTRUCTURE ===== */
  .infra-lead{background:linear-gradient(180deg,color-mix(in srgb,var(--accent) 7%,transparent),transparent); border-top:2px solid var(--accent)}
  .infra-tag{display:inline-flex; align-items:center; gap:.5rem; font-family:var(--mono); font-size:.68rem; letter-spacing:.2em; text-transform:uppercase; color:var(--accent); font-weight:600}
  .infra-tag::before{content:""; width:26px; height:2px; background:var(--accent)}

  /* reference architecture pipeline */
  .refarch{position:relative; display:flex; flex-direction:column; gap:.6rem; margin-top:1.9rem}
  .refarch::before{content:""; position:absolute; left:15px; top:22px; bottom:22px; width:2px; background:linear-gradient(180deg,var(--wire),var(--accent)); z-index:0; border-radius:2px}
  .spark{position:absolute; left:9px; width:14px; height:14px; border-radius:50%; background:var(--accent); box-shadow:0 0 16px 3px color-mix(in srgb,var(--accent) 80%,transparent); z-index:3; top:2%; animation:flow 5.5s linear infinite}
  @keyframes flow{0%{top:1%;opacity:0}8%{opacity:1}92%{opacity:1}100%{top:95%;opacity:0}}
  .tier{position:relative; z-index:1; display:grid; grid-template-columns:32px 1fr; gap:1rem; align-items:start}
  .tier .tn{width:32px; height:32px; border-radius:50%; background:var(--bg); border:2px solid var(--wire); color:var(--wire); font-family:var(--mono); font-weight:700; font-size:.78rem; display:flex; align-items:center; justify-content:center; flex:none}
  .tier .tbody{background:var(--card); border:1px solid var(--card-line); border-radius:10px; padding:.85rem 1.1rem; transition:border-color .3s,transform .3s}
  .tier .tbody:hover{border-color:var(--wire); transform:translateX(5px)}
  .tier .tt{font-family:var(--sans); font-weight:700; font-size:1rem; display:flex; gap:.6rem; align-items:baseline; flex-wrap:wrap}
  .tier .tt small{font-family:var(--mono); font-size:.62rem; color:var(--muted); font-weight:400; letter-spacing:.1em; text-transform:uppercase}
  .tier .td{font-size:.88rem; color:var(--ink-dim); margin-top:.35rem; line-height:1.5; max-width:none}
  .comps{display:flex; flex-wrap:wrap; gap:.35rem; margin-top:.6rem}
  .comp{font-family:var(--mono); font-size:.65rem; color:var(--wire); border:1px solid var(--wire-dim); border-radius:5px; padding:.16rem .45rem; background:color-mix(in srgb,var(--wire) 8%,transparent)}
  .tier.cross .tn{border-color:var(--accent); color:var(--accent); border-style:dashed}
  .tier.cross .tbody{border-style:dashed; border-color:var(--accent-deep); background:color-mix(in srgb,var(--accent) 6%,transparent)}
  .tier.cross .comp{color:var(--accent); border-color:var(--accent-deep); background:color-mix(in srgb,var(--accent) 9%,transparent)}

  /* platform cards */
  .plats{display:grid; grid-template-columns:repeat(2,1fr); gap:1rem; margin-top:1.6rem}
  @media (max-width:760px){ .plats{grid-template-columns:1fr} }
  .plat{background:var(--card); border:1px solid var(--card-line); border-radius:13px; padding:1.2rem 1.35rem; display:flex; flex-direction:column; gap:.45rem}
  .plat.feature{grid-column:1/-1; border-color:var(--accent-deep); box-shadow:var(--shadow); background:linear-gradient(150deg,color-mix(in srgb,var(--accent) 7%,var(--card)),var(--card) 60%)}
  .plat h4{margin:0; font-family:var(--sans); font-size:1.08rem; font-weight:800; display:flex; align-items:center; gap:.55rem; flex-wrap:wrap; letter-spacing:-.01em}
  .plat .who{font-family:var(--mono); font-size:.63rem; color:var(--muted); letter-spacing:.12em; text-transform:uppercase}
  .plat p{font-size:.9rem; color:var(--ink-dim); margin:.15rem 0 0; max-width:none; line-height:1.5}
  .plat .comps .comp{color:var(--accent); border-color:var(--accent-deep); background:color-mix(in srgb,var(--accent) 9%,transparent)}
  .kv{display:grid; grid-template-columns:repeat(auto-fit,minmax(122px,1fr)); gap:.55rem; margin-top:.55rem}
  .kvi{background:var(--surface2); border:1px solid var(--card-line); border-radius:8px; padding:.55rem .7rem}
  .kvi b{display:block; font-family:var(--mono); font-size:.98rem; color:var(--accent); font-variant-numeric:tabular-nums; line-height:1.2}
  .kvi span{font-family:var(--mono); font-size:.6rem; color:var(--muted); letter-spacing:.05em; text-transform:uppercase}

  /* microVM isolation */
  .mvm-host{border:1px dashed var(--wire-dim); border-radius:11px; padding:1rem 1.1rem; background:color-mix(in srgb,var(--wire) 4%,transparent); margin-top:.4rem}
  .mvm-host .hl{font-family:var(--mono); font-size:.63rem; color:var(--wire); letter-spacing:.14em; text-transform:uppercase; margin-bottom:.8rem}
  .mvm-cells{display:grid; grid-template-columns:repeat(auto-fit,minmax(115px,1fr)); gap:.65rem}
  .mvm-cell{border:1.5px solid var(--wire-dim); border-radius:9px; padding:.75rem .5rem; background:var(--card); text-align:center; position:relative}
  .mvm-cell .ci{font-family:var(--mono); font-size:.72rem; color:var(--ink); font-weight:600}
  .mvm-cell .cs{font-family:var(--mono); font-size:.58rem; color:var(--wire); margin-top:.3rem; letter-spacing:.03em}
  .mvm-cell.term{opacity:.55; border-style:dashed; border-color:var(--bad)}
  .mvm-cell.term .cs{color:var(--bad)}

  /* sandbox ladder */
  .ladder{display:flex; flex-direction:column; gap:.5rem; margin-top:1.5rem}
  .rung{display:grid; grid-template-columns:1fr auto; gap:1rem; align-items:center; padding:.85rem 1.1rem; border-radius:10px; border:1px solid var(--card-line); background:var(--card)}
  .rung .rl{min-width:0}
  .rung .rn{font-family:var(--sans); font-weight:800; font-size:.98rem}
  .rung .rd{font-family:var(--mono); font-size:.7rem; color:var(--ink-dim); margin-top:.2rem; line-height:1.4}
  .rung .rmeter{font-family:var(--mono); font-size:.64rem; color:var(--muted); white-space:nowrap; text-align:right}
  .rung.best{border-left:4px solid var(--ok)} .rung.best .rn{color:var(--ok)}
  .rung.mid{border-left:4px solid var(--rep)}
  .rung.worst{border-left:4px solid var(--bad)} .rung.worst .rn{color:var(--bad)}

  /* k8s cluster */
  .k8s{margin-top:1.7rem; border:1.5px dashed var(--wire-dim); border-radius:15px; padding:1.5rem 1.2rem 1.2rem; position:relative; background:color-mix(in srgb,var(--wire) 4%,transparent)}
  .k8s .kt{position:absolute; top:-.66rem; left:1.1rem; background:var(--bg); padding:0 .55rem; font-family:var(--mono); font-size:.64rem; letter-spacing:.14em; text-transform:uppercase; color:var(--wire); font-weight:600}
  .k8s-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(155px,1fr)); gap:.8rem}
  .pod{background:var(--card); border:1px solid var(--card-line); border-radius:10px; padding:.85rem .95rem}
  .pod .pt{font-family:var(--sans); font-weight:700; font-size:.9rem}
  .pod .pd{font-family:var(--mono); font-size:.63rem; color:var(--muted); margin-top:.35rem; line-height:1.45}
  .pod.gpu{border-color:var(--accent); background:color-mix(in srgb,var(--accent) 5%,var(--card))} .pod.gpu .pt{color:var(--accent)}
  .k8s-ext{display:grid; grid-template-columns:repeat(auto-fit,minmax(140px,1fr)); gap:.7rem; margin-top:.8rem}
  .extbox{background:var(--surface2); border:1px dashed var(--card-line); border-radius:9px; padding:.7rem .85rem; font-family:var(--mono); font-size:.68rem; color:var(--ink-dim)}
  .extbox b{color:var(--wire); display:block; font-size:.6rem; letter-spacing:.1em; text-transform:uppercase; margin-bottom:.25rem}

  /* cost swing */
  .swing{display:grid; grid-template-columns:1fr auto 1fr; align-items:center; gap:1rem; margin-top:1.6rem; text-align:center}
  @media (max-width:560px){ .swing{grid-template-columns:1fr; text-align:left} }
  .swing .sc{background:var(--card); border:1px solid var(--card-line); border-radius:12px; padding:1.3rem}
  .swing .sc .sn{font-family:var(--sans); font-weight:800; font-size:clamp(1.6rem,4vw,2.3rem); font-variant-numeric:tabular-nums; letter-spacing:-.01em}
  .swing .sc.lo .sn{color:var(--ok)} .swing .sc.hi .sn{color:var(--bad)}
  .swing .sc .sl{font-family:var(--mono); font-size:.66rem; color:var(--muted); margin-top:.4rem; letter-spacing:.03em}
  .swing .arrow{font-family:var(--mono); font-size:.8rem; color:var(--accent); font-weight:700}
  .swing .arrow b{display:block; font-size:1.5rem}

  /* ---- multipage additions ---- */
  nav.toc a.current{color:var(--accent); background:var(--surface2)}
  .pager{display:flex; justify-content:space-between; gap:1rem; padding:2.4rem 0 1rem; border-top:1px solid var(--faint); margin-top:1rem}
  .pager a{flex:1; max-width:22rem; text-decoration:none; font-family:var(--mono); font-size:.8rem; padding:1rem 1.2rem; border:1px solid var(--card-line); border-radius:11px; background:var(--card); color:var(--ink-dim); transition:border-color .3s,transform .3s}
  .pager a:hover{border-color:var(--accent); transform:translateY(-3px); color:var(--ink)}
  .pager a.next{text-align:right}
  .pager .pk{display:block; font-size:.62rem; letter-spacing:.16em; text-transform:uppercase; color:var(--muted); margin-bottom:.35rem}
  .pager a.disabled{visibility:hidden}

/* ===== LEARN / TEACHING ===== */
.prose{max-width:46rem}
.prose > p, .prose > ul, .prose > ol{max-width:46rem}
.prose h3{font-family:var(--sans); font-size:1.28rem; font-weight:800; letter-spacing:-.015em; margin:2.4rem 0 .5rem; line-height:1.15; text-wrap:balance}
.prose h4{font-family:var(--sans); font-size:1.02rem; font-weight:700; margin:1.6rem 0 .3rem; color:var(--ink)}
.prose p{margin:.9rem 0; color:var(--ink-dim)}
.prose strong,.prose b{color:var(--ink); font-weight:700}
.prose ul,.prose ol{color:var(--ink-dim); padding-left:1.2rem; margin:.9rem 0}
.prose li{margin:.5rem 0}
.prose li::marker{color:var(--wire)}
.lead-p{font-size:1.12rem; line-height:1.6; color:var(--ink); max-width:46rem}
.kterm{border-left:3px solid var(--wire); background:var(--surface2); border-radius:0 11px 11px 0; padding:1rem 1.2rem; margin:1.5rem 0; max-width:46rem}
.kterm .kt{color:var(--wire); font-family:var(--mono); font-size:.72rem; letter-spacing:.08em; text-transform:uppercase; display:block; margin-bottom:.4rem; font-weight:600}
.kterm p{margin:.2rem 0 0; font-size:.96rem}
.callout{background:color-mix(in srgb,var(--accent) 8%,var(--card)); border:1px solid var(--accent-deep); border-radius:11px; padding:1.1rem 1.3rem; margin:1.6rem 0; max-width:46rem}
.callout .cl{font-family:var(--mono); font-size:.68rem; letter-spacing:.14em; text-transform:uppercase; color:var(--accent); display:block; margin-bottom:.5rem; font-weight:600}
.callout p{margin:.3rem 0 0; font-size:.96rem}
.mn{font-family:var(--mono)}
.code{font-family:var(--mono); font-size:.8rem; background:var(--bg2); border:1px solid var(--card-line); border-radius:10px; padding:1rem 1.15rem; overflow-x:auto; margin:1.2rem 0; max-width:46rem; color:var(--ink-dim); line-height:1.65; white-space:pre}
.code .c{color:var(--muted)}
.code .k{color:var(--accent)}
.code .s{color:var(--wire)}
.steps{counter-reset:st; display:flex; flex-direction:column; gap:.9rem; margin:1.6rem 0; max-width:46rem}
.step{position:relative; padding-left:3rem; min-height:2rem}
.step::before{counter-increment:st; content:counter(st); position:absolute; left:0; top:-2px; width:2rem; height:2rem; border-radius:50%; background:var(--accent); color:#08131f; font-family:var(--mono); font-weight:700; font-size:.9rem; display:flex; align-items:center; justify-content:center}
.step b{display:block; font-family:var(--sans); color:var(--ink); margin-bottom:.15rem}
.step span{font-size:.92rem; color:var(--ink-dim)}
.statrow{display:grid; grid-template-columns:repeat(auto-fit,minmax(150px,1fr)); gap:.8rem; margin:1.6rem 0; max-width:46rem}
.statbox{background:var(--card); border:1px solid var(--card-line); border-radius:11px; padding:1rem}
.statbox b{display:block; font-family:var(--sans); font-weight:800; font-size:1.5rem; color:var(--accent); font-variant-numeric:tabular-nums; letter-spacing:-.01em; line-height:1}
.statbox span{font-family:var(--mono); font-size:.64rem; color:var(--muted); letter-spacing:.03em; text-transform:uppercase; display:block; margin-top:.45rem; line-height:1.4}
.hubgrid{display:grid; grid-template-columns:repeat(auto-ffill,minmax(240px,1fr)); gap:1rem; margin-top:1.6rem}
.hubgrid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.hubcard{display:block; text-decoration:none; background:var(--card); border:1px solid var(--card-line); border-radius:13px; padding:1.3rem; transition:transform .3s,border-color .3s; color:inherit}
.hubcard:hover{transform:translateY(-4px); border-color:var(--accent); box-shadow:var(--shadow)}
.hubcard .hn{font-family:var(--mono); font-size:.66rem; letter-spacing:.14em; text-transform:uppercase; color:var(--accent)}
.hubcard h3{font-family:var(--sans); font-size:1.12rem; font-weight:800; margin:.5rem 0 .3rem; letter-spacing:-.01em; color:var(--ink)}
.hubcard p{font-size:.88rem; color:var(--ink-dim); margin:0; line-height:1.45}
.grouplabel{font-family:var(--mono); font-size:.72rem; letter-spacing:.16em; text-transform:uppercase; color:var(--muted); margin:2.4rem 0 .2rem; display:flex; align-items:center; gap:.7rem}
.grouplabel::after{content:""; flex:1; height:1px; background:var(--faint)}
.tagline{font-family:var(--mono); font-size:.7rem; color:var(--muted); letter-spacing:.04em}
figure.diagram{margin:1.7rem 0; max-width:46rem}
figure.diagram figcaption{font-family:var(--mono); font-size:.68rem; color:var(--muted); margin-top:.6rem; letter-spacing:.02em}
.flow{display:flex; flex-wrap:wrap; align-items:center; gap:.5rem; margin:1.4rem 0; max-width:46rem}
.flow .fb{background:var(--surface2); border:1px solid var(--card-line); border-radius:8px; padding:.5rem .8rem; font-family:var(--mono); font-size:.74rem; color:var(--ink)}
.flow .fb.hot{border-color:var(--accent); color:var(--accent)}
.flow .fa{color:var(--wire); font-family:var(--mono); font-weight:700}
/* ==GEN-NAV== */

/* ===== DOCS NAVIGATION ===== */
:root{--barH:57px}
nav.toc{display:none !important}
.bar-in{gap:.7rem; min-height:56px}
.hamburger{display:inline-flex; align-items:center; justify-content:center; width:40px; height:34px; border-radius:9px; border:1px solid var(--card-line); background:var(--surface2); color:var(--ink); cursor:pointer; font-size:1.15rem; line-height:1}
.hamburger:hover{border-color:var(--accent); color:var(--accent)}
.sidebar{position:fixed; top:var(--barH); left:0; bottom:0; width:270px; overflow-y:auto; background:var(--surface); border-right:1px solid var(--faint); padding:1rem .8rem 3rem; transform:translateX(-101%); transition:transform .28s cubic-bezier(.2,.7,.2,1); z-index:55; -webkit-overflow-scrolling:touch}
.sidebar.open{transform:none}
.sidebar::-webkit-scrollbar{width:8px}
.sidebar::-webkit-scrollbar-thumb{background:var(--faint); border-radius:4px}
.navg{font-family:var(--mono); font-size:.64rem; letter-spacing:.16em; text-transform:uppercase; color:var(--muted); margin:1.3rem .55rem .45rem; display:flex; align-items:center; gap:.55rem}
.navg::after{content:""; flex:1; height:1px; background:var(--faint)}
.navl{display:flex; gap:.55rem; align-items:baseline; padding:.5rem .6rem; border-radius:9px; font-family:var(--sans); font-size:.87rem; color:var(--ink-dim); text-decoration:none; border-left:2px solid transparent; transition:background .15s,color .15s}
.navl .ix{font-family:var(--mono); font-size:.66rem; color:var(--muted); min-width:1.55rem; text-align:right}
.navl:hover{background:var(--surface2); color:var(--ink)}
.navl.current{background:color-mix(in srgb,var(--accent) 13%,transparent); color:var(--accent); border-left-color:var(--accent); font-weight:600}
.navl.current .ix{color:var(--accent)}
.navl.home{color:var(--wire); font-weight:600; margin-bottom:.2rem}
.navl.home .ix{color:var(--wire)}
.scrim{position:fixed; inset:0; background:rgba(3,10,18,.55); opacity:0; pointer-events:none; transition:opacity .28s; z-index:54}
.scrim.show{opacity:1; pointer-events:auto}
.content{min-height:62vh}
.content > .pager, .content > footer{transition:none}
@media (min-width:1024px){
  .sidebar{transform:none; box-shadow:none}
  .content{margin-left:270px}
  .hamburger{display:none}
  .scrim{display:none !important}
}