:root{
  --bg:#fbfaf7;--fg:#1d2420;--fg2:#3d4741;--muted:#6a736d;--line:#e3dfd6;--soft:#f3f1ec;
  --wrong:#c2410c;--correct:#0f766e;--neutral:#b9bcb2;--check:#4453c4;
  --p-endorsement:#c2410c;--p-provenance:#2f6db3;--p-reserved:#7a4fc9;
  --serif:Charter,"Bitstream Charter","Iowan Old Style","Palatino Linotype",Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:64px}
body{margin:0;background:var(--bg);color:var(--fg);font:19px/1.65 var(--serif);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration-color:#b9b3a6;text-underline-offset:3px}
a:hover{text-decoration-color:var(--fg)}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid #d97706;outline-offset:2px;border-radius:3px}
[hidden]{display:none!important}
code{font:0.85em var(--mono);background:var(--soft);padding:1px 5px;border-radius:3px}
.skip-link{position:fixed;left:12px;top:-60px;background:var(--fg);color:#fff;padding:8px 12px;z-index:50;font:14px var(--sans)}
.skip-link:focus{top:10px}
.anchor-alias{position:absolute;margin-top:-1px}

.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px 28px;background:rgba(251,250,247,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);font:14px var(--sans)}
.home{display:flex;align-items:center;gap:8px;font-weight:650;text-decoration:none}
.topbar nav{display:flex;gap:22px}
.topbar nav a{text-decoration:none;color:var(--fg2)}
.topbar nav a:hover{color:var(--fg);text-decoration:underline}

article{padding:56px 24px 80px}
.col{max-width:680px;margin-left:auto;margin-right:auto;position:relative}
.meta{font:14px var(--sans);color:var(--muted);margin:0 0 14px}
h1{font:600 clamp(32px,4.4vw,46px)/1.15 var(--serif);letter-spacing:-.01em;margin:0 0 18px}
.dek{font-size:21px;line-height:1.55;color:var(--fg2);margin:0}
h2{font:600 26px/1.3 var(--serif);margin:52px 0 14px}
p{margin:0 0 18px}
.summary{margin-top:36px;padding:20px 24px;background:var(--soft);border-left:3px solid var(--fg);border-radius:0 6px 6px 0}
.summary h2{font:700 13px var(--sans);letter-spacing:.06em;text-transform:uppercase;margin:0 0 10px;color:var(--fg2)}
.summary ul{margin:0;padding-left:20px}
.summary li{margin:0 0 10px;font-size:18px;line-height:1.55}
.summary li:last-child{margin:0}

.policies{display:grid;grid-template-columns:max-content 1fr;gap:6px 16px;margin:0 0 18px;font-size:18px}
.policies dt{font-weight:600;display:flex;align-items:center;gap:8px}
.policies dd{margin:0;color:var(--fg2)}
.sw{display:inline-block;width:11px;height:11px;border-radius:2px;flex:none}
.sw.endorsement{background:var(--p-endorsement)}.sw.provenance{background:var(--p-provenance)}.sw.reserved{background:var(--p-reserved)}
.try{font:600 14px var(--sans);background:transparent;border:1px solid var(--fg);border-radius:4px;padding:1px 9px;margin-left:4px;white-space:nowrap;vertical-align:1px}
.try:hover{background:var(--fg);color:var(--bg)}
.try::before{content:"▶ ";font-size:10px}
.hyps{padding-left:22px}
.hyps li{margin-bottom:10px}
.refs ul{padding-left:0;list-style:none}
.refs li{margin-bottom:12px;font-size:17px;color:var(--fg2);padding-left:16px;text-indent:-16px}
.endnote{margin-top:56px;padding-top:20px;border-top:1px solid var(--line);font-size:16px;color:var(--muted)}

/* Figures */
.fig{margin:34px auto 38px;font-family:var(--sans)}
.fig-narrow{max-width:680px}.fig-mid{max-width:860px}.fig-wide{max-width:1120px}
figcaption{max-width:680px;margin:14px auto 0;font:14.5px/1.55 var(--sans);color:var(--muted)}
figcaption b{color:var(--fg)}
.patches{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.patch-name{font-size:15px;margin:0 0 6px;color:var(--fg2)}
.terminal{margin:0;background:#1a201d;color:#d5ddd8;font:13.5px/1.6 var(--mono);padding:12px 14px;border-radius:6px;overflow-x:auto}
.terminal .dim{color:#7d8a83}.terminal .ok{color:#6fd3a9;font-weight:700}
.probe{margin:8px 0 0;font-size:14.5px;padding:8px 10px;border-radius:5px}
.probe b{font-family:var(--mono)}
.probe span{float:right;font-weight:600}
.probe.ok{background:#e1f0ec;color:#0b5048}
.probe.bad{background:#fae4d8;color:#8a2e08}
#fig-loop svg{width:100%;height:auto;display:block}
.lp-edge path{fill:none;stroke:#8c8678;stroke-width:1.6}
.lp-node rect{fill:#fff;stroke:#cfc9bc;stroke-width:1.2}
.lp-node text{font:600 15px var(--sans);fill:var(--fg);text-anchor:middle}
.lp-node.hot rect{fill:#e6e8f8;stroke:var(--check)}
.lp-node.hot text{fill:#2c3794}

/* Simulation figure */
.sim{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:18px 0}
.sim-top{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.policy-switch,.playback,.episode-switch{display:flex;gap:6px;flex-wrap:wrap}
.policy-switch button,.episode-switch button{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:550;background:#fff;border:1px solid var(--line);border-radius:5px;padding:6px 11px}
.policy-switch button[aria-checked=true],.episode-switch button[aria-checked=true]{border-color:var(--fg);box-shadow:inset 0 0 0 1px var(--fg)}
.btn{font-size:14px;font-weight:550;background:#fff;border:1px solid var(--line);border-radius:5px;padding:6px 12px}
.btn:hover{border-color:var(--fg)}
.btn.primary{background:var(--fg);color:var(--bg);border-color:var(--fg)}
.btn:disabled{opacity:.4;cursor:not-allowed}
.sim-body{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:28px}
.network-col,.chart-col,.pilot-body>div{min-width:0}
.network-wrap{position:relative;height:400px;background:#fff;border:1px solid var(--line);border-radius:6px}
#network{width:100%;height:100%;display:block;cursor:pointer}
.round{position:absolute;left:12px;top:8px;margin:0;font-size:13px;color:var(--muted)}
.round strong{font:500 20px var(--mono);color:var(--fg)}
.truth{position:absolute;right:12px;top:12px;margin:0;font-size:12.5px;font-weight:600;color:#8a2e08;background:#fae4d8;padding:2px 8px;border-radius:4px}
.truth.true{color:#0b5048;background:#e1f0ec}
.legend{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:13px;color:var(--muted);margin:8px 0 0}
.legend span{display:inline-flex;align-items:center;gap:5px}
.dot{width:9px;height:9px;border-radius:50%;display:inline-block}
.dot.wrong{background:var(--wrong)}.dot.correct{background:var(--correct)}.dot.neutral{background:var(--neutral)}
.ring{width:11px;height:11px;border-radius:50%;border:1.6px solid var(--fg);display:inline-block}
.ring.pending{border:1.6px dashed var(--check)}
.readouts{display:grid;grid-template-columns:1fr 1fr 1.3fr;gap:12px;margin-top:14px}
.readouts p{margin:0;font-size:13px;color:var(--muted);display:flex;flex-direction:column}
.readouts strong{font:500 24px/1.25 var(--mono);color:var(--fg)}
.readouts small{font-size:12.5px}
.effort-bar{display:block;height:5px;background:var(--soft);border-radius:3px;margin-top:6px;overflow:hidden}
.effort-bar i{display:block;height:100%;width:0;background:var(--check)}
.agent-card{position:absolute;right:10px;top:42px;width:min(300px,calc(100% - 20px));max-height:calc(100% - 52px);overflow:auto;background:#fff;border:1px solid var(--line);border-radius:6px;padding:12px 14px;box-shadow:0 10px 30px -14px rgba(0,0,0,.35);font-size:14px}
.agent-card h3{font:650 16px var(--sans);margin:0 0 6px;outline:none}
.agent-card p{margin:0 0 6px;color:var(--fg2)}
.agent-card .close{position:absolute;right:6px;top:4px;border:0;background:transparent;font-size:20px;color:var(--muted);width:28px;height:28px}
.ev{border-top:1px solid var(--line);padding-top:6px;margin-top:6px}
.ev code{font-weight:600}
.ev span{display:block;color:var(--muted);font-size:13px}
.chart-title{font-size:14px;font-weight:600;margin:0 0 4px}
#chart{width:100%;height:220px;display:block}
.chart-key{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:13px;color:var(--muted);margin:4px 0 10px}
.chart-key span{display:inline-flex;align-items:center;gap:6px}
.chart-key i{display:inline-block;width:16px;height:3px;border-radius:2px}
.table-scroll{overflow-x:auto}
.compare{width:100%;border-collapse:collapse;font-size:14px}
.compare th,.compare td{padding:7px 8px;text-align:right;border-bottom:1px solid var(--line);white-space:nowrap}
.compare thead th{font-weight:600;color:var(--muted);font-size:12.5px}
.compare th:first-child{text-align:left;padding-left:0}
.compare td{font-family:var(--mono);font-variant-numeric:tabular-nums}
.compare tbody th{font-weight:550}
.compare tbody th i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:7px}
.compare tr.selected{background:var(--soft)}
.assumptions{margin-top:16px;border-top:1px solid var(--line);padding-top:10px;font-size:14px}
.assumptions summary{cursor:pointer;font-weight:600;color:var(--fg2)}
.assumption-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px 20px;margin-top:14px}
.field{display:flex;flex-direction:column;gap:5px;font-size:13.5px;font-weight:550;margin:0}
.field select,.field input{background:#fff;border:1px solid var(--line);border-radius:5px;padding:6px 8px;font-size:14px;font-weight:400;width:100%}
.field .inline{display:flex;gap:6px;flex-wrap:wrap}
.field .inline input{width:80px}
.range{display:block;font-size:13.5px;font-weight:550}
.range>span{display:flex;justify-content:space-between;margin-bottom:4px}
.range output{font-family:var(--mono);color:var(--wrong)}
.range input{width:100%;accent-color:var(--fg)}
.status{margin:10px 0 0;font-size:13.5px;color:var(--muted);min-height:1.4em}

/* Pilot figure */
.episode-switch{margin-bottom:14px}
.pilot-body{display:grid;grid-template-columns:auto minmax(0,1fr);gap:28px;align-items:start}
.pilot-grid{display:grid;grid-template-columns:62px repeat(8,40px);gap:4px;align-items:center}
.col-h,.row-h{font:600 12px var(--mono);color:var(--muted);text-align:center}
.row-h{text-align:left;display:flex;align-items:center;gap:4px}
.row-h .seed{color:var(--wrong)}
.cell{position:relative;width:40px;height:40px;border:0;border-radius:4px;padding:0}
.cell.check,.cell-sw.check{background:#5b67d6}
.cell.relay,.cell-sw.relay{background:#e0a24f}
.cell.abstain,.cell-sw.abstain{background:#dcd8ce}
.cell.invalid,.cell-sw.invalid{background:repeating-linear-gradient(45deg,#e0573a 0 3px,#f6c9bb 3px 6px)}
.cell[aria-selected=true]{box-shadow:0 0 0 2px var(--bg),0 0 0 4px var(--fg)}
.cell .bar{position:absolute;right:3px;bottom:3px;width:4px;border-radius:2px;background:#fff;opacity:.95;box-shadow:0 0 0 1px rgba(0,0,0,.15)}
.cell .probe-mark{position:absolute;left:3px;top:1px;font-size:10px;color:#0b5048}
.cell.check .probe-mark{color:#d7fff1}
.cell-sw{display:inline-block;width:12px;height:12px;border-radius:2px}
.mk{font-weight:400;color:var(--wrong);font-size:12px}.mk.probe{color:#0b5048}
.grid-legend{max-width:420px}
.grid-legend .mk{font-size:13px;line-height:1}
.decision{border-left:2px solid var(--line);padding:2px 0 2px 22px;font-size:15px;min-height:300px}
.decision .who{font-size:13px;color:var(--muted);margin:0}
.decision h3{font:650 18px var(--sans);margin:2px 0 10px}
.decision dl{display:grid;grid-template-columns:max-content 1fr;gap:4px 14px;margin:0 0 12px}
.decision dt{color:var(--muted)}
.decision dd{margin:0}
.decision blockquote{margin:0 0 10px;font:italic 17px/1.55 var(--serif);color:var(--fg);border-left:3px solid #e0a24f;padding-left:12px}
.decision pre{white-space:pre-wrap;word-break:break-word;background:#fdf1ec;border:1px solid #f3cdbf;border-radius:5px;padding:10px;font:12.5px/1.5 var(--mono);max-height:170px;overflow:auto;margin:6px 0 0}
.decision .note{font-size:13.5px;color:var(--muted);margin:0}
.decision code{font-size:12px}

.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);background:var(--fg);color:var(--bg);padding:10px 16px;border-radius:6px;font:14px var(--sans);z-index:60;max-width:90vw}

@media (max-width:980px){
  .sim-body,.pilot-body{grid-template-columns:minmax(0,1fr)}
  .assumption-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .decision{border-left:0;border-top:2px solid var(--line);padding:14px 0 0}
}
@media (max-width:640px){
  body{font-size:18px}
  article{padding:36px 18px 60px}
  .topbar{padding:10px 16px}
  .topbar nav{gap:12px;font-size:13px}
  .topbar nav a:nth-child(2){display:none}
  .dek{font-size:19px}
  .patches{grid-template-columns:1fr}
  .policies{grid-template-columns:1fr}
  .policies dd{margin-bottom:6px}
  .network-wrap{height:330px}
  .readouts{grid-template-columns:1fr 1fr}
  .readouts .effort{grid-column:1/-1}
  .assumption-grid{grid-template-columns:1fr}
  .pilot-grid{grid-template-columns:22px repeat(8,minmax(0,1fr));gap:3px}
  .cell{width:auto;height:auto;aspect-ratio:1}
  .row-h .long{display:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}