:root{
  /* Layout tokens — one width system for every tab. Tune here only. */
  --site-w:1400px;   /* container: header and all pages share it; wide pages fill it, narrow pages center inside it */
  --gutter:80px;     /* inset from the container edge to content, both sides */
  --toc-w:230px;     /* side table-of-contents column (both the essay and the workspace tabs) */
  --toc-gap:32px;    /* gap between the TOC column and the body */
  --toc-top:84px;    /* sticky offset under the header */
  --measure:720px;   /* TEXT class: paragraphs, lists, headings, callouts, captions */
  --wide:var(--measure);   /* WIDE class: equals TEXT on narrow pages (figures stack); wide pages set it to 100% */
  --column:calc(var(--toc-w) + var(--toc-gap) + var(--measure));   /* menu + gap + one text column */
  color-scheme:light;
  --bg:#f5f5f2; --panel:#ffffff; --panel-2:#eeeeea; --ink:#141614; --ink-2:#4c504c; --ink-3:#7d827d; --line:#d9dbd5; --line-2:#c5c8c1;
  --accent:#2a78d6; --accent-ink:#1c5cab;
  --s1:#2a78d6; --s2:#eb6834; --s3:#1baf7a; --s4:#eda100; --s5:#e87ba4; --s6:#008300; --s7:#4a3aa7; --s8:#e34948; --neutral:#8b8f89;
  --seq1:#cde2fb; --seq2:#9ec5f4; --seq3:#6da7ec; --seq4:#3987e5; --seq5:#256abf; --seq6:#184f95; --seq7:#0d366b;
  --crit:#d03b3b; --good:#0ca30c;
}
@media (prefers-color-scheme:dark){ :root:not([data-theme="light"]){
  color-scheme:dark;
  --bg:#171917; --panel:#1f221f; --panel-2:#272b27; --ink:#e7e9e4; --ink-2:#b4b8b1; --ink-3:#848a83; --line:#2f342f; --line-2:#3d433d;
  --accent:#3987e5; --accent-ink:#86b6ef;
  --s1:#3987e5; --s2:#d95926; --s3:#199e70; --s4:#c98500; --s5:#d55181; --s6:#008300; --s7:#9085e9; --s8:#e66767; --neutral:#7e847d;
  --seq1:#184f95; --seq2:#1c5cab; --seq3:#256abf; --seq4:#2a78d6; --seq5:#3987e5; --seq6:#5598e7; --seq7:#86b6ef;
}}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#171917; --panel:#1f221f; --panel-2:#272b27; --ink:#e7e9e4; --ink-2:#b4b8b1; --ink-3:#848a83; --line:#2f342f; --line-2:#3d433d;
  --accent:#3987e5; --accent-ink:#86b6ef;
  --s1:#3987e5; --s2:#d95926; --s3:#199e70; --s4:#c98500; --s5:#d55181; --s6:#008300; --s7:#9085e9; --s8:#e66767; --neutral:#7e847d;
  --seq1:#184f95; --seq2:#1c5cab; --seq3:#256abf; --seq4:#2a78d6; --seq5:#3987e5; --seq6:#5598e7; --seq7:#86b6ef;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:"Source Serif 4","Iowan Old Style",Georgia,serif;font-size:16px;line-height:1.5}
body{padding-block:0 60px;padding-inline:clamp(16px,3vw,40px)}
a{color:var(--accent-ink)}
header.top{display:flex;flex-wrap:wrap;gap:8px 24px;align-items:baseline;padding:18px 0 12px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--bg);z-index:5;max-width:var(--site-w);margin-inline:auto}
header.top h1{font-size:19px;font-weight:600;margin:0;letter-spacing:-.01em}
header.top .sub{color:var(--ink-3);font-family:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;font-size:12.5px}
nav.tabs{display:flex;flex-wrap:wrap;gap:2px;margin-left:auto}
nav.tabs button{font-family:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;font-size:13px;letter-spacing:.02em;background:none;border:0;border-bottom:2px solid transparent;color:var(--ink-2);padding:6px 10px;cursor:pointer}
nav.tabs button.on{color:var(--ink);border-bottom-color:var(--accent)}
nav.tabs button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
main{max-width:var(--site-w);margin:0 auto;padding-inline:var(--gutter)}
section.page{display:none;padding-top:22px}
/* Narrow pages (the essay, text tabs) center the menu+column construction; wide pages (tables, charts, the explorer) fill the container and let WIDE blocks span the body. */
section.page{max-width:var(--column);margin-inline:auto}
section.page:not(.with-toc):not(#page-overview):not(.wide){max-width:var(--measure)}
section.page.wide{max-width:none;--wide:100%}
section.page.on{display:block}
section.page.with-toc.on{display:grid;grid-template-columns:var(--toc-w) minmax(0,1fr);gap:0 var(--toc-gap);align-items:start}
/* Side table of contents — one style for the essay (.essay-contents) and the workspace tabs (.page-toc): divider on the right, marker on the divider. */
.page-toc,.essay-contents{position:sticky;top:var(--toc-top);align-self:start;font-family:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;font-size:14px;line-height:1.4;display:flex;flex-direction:column;gap:11px;padding:2px 0 12px 0;border-right:1px solid var(--line);margin-right:0}
.page-toc.tall,.essay-contents.tall{max-height:calc(100vh - var(--toc-top) - 16px);overflow-y:auto;scrollbar-width:thin;padding-right:8px}   /* only a menu taller than the viewport scrolls inside itself; short menus never do */
.page-toc.tall::-webkit-scrollbar{width:6px}.page-toc.tall::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:3px}
.page-body>:first-child,.essay-body>:first-child{margin-top:0}
section.page.with-toc h3{scroll-margin-top:76px}
.page-toc-label,.essay-contents .essay-label{font-size:11px;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3);margin:0 0 6px;font-weight:500}
.page-toc a,.essay-contents a{color:var(--ink-2);text-decoration:none;padding:1px 16px 1px 0;border-right:2px solid transparent;margin-right:-1px}
.page-toc a:hover,.essay-contents a:hover{color:var(--ink)}
.page-toc a.on,.essay-contents a.active{color:var(--accent-ink);font-weight:500;border-right-color:var(--accent)}
.page-body{min-width:0}
@media (max-width:900px){section.page.with-toc.on{display:block}.page-toc,.essay-contents{display:none}}   /* narrow screens: one column; the menu is the bar under the header (below) */
h2{font-size:24px;font-weight:600;margin:24px 0 8px;letter-spacing:-.01em;text-wrap:balance;max-width:var(--measure)}
ul,ol{max-width:var(--measure)}
.tablewrap,.stats,.grid,.row2,.explorer,.filters,ol.claims{max-width:var(--wide)}
h3{font-family:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;font-size:12.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3);margin:26px 0 8px;font-weight:600}
p{max-width:var(--measure)}
p.lede{font-size:18px;color:var(--ink-2);max-width:var(--measure)}
.mono{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace}
.sans{font-family:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif}
.small{font-size:13px;color:var(--ink-2)}
.muted{color:var(--ink-3)}
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.card{background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:16px 18px}
.stat{padding:12px 14px;background:var(--panel);border:1px solid var(--line);border-radius:6px}
.stat .k{font-family:"IBM Plex Sans",sans-serif;font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
.stat .v{font-family:"IBM Plex Sans",sans-serif;font-size:26px;font-weight:600;font-variant-numeric:tabular-nums;line-height:1.15;margin-top:3px}
.stat .n{font-size:13px;color:var(--ink-2);margin-top:2px}
.stats{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));margin:12px 0 6px}
table{border-collapse:collapse;width:100%;font-family:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;font-size:13.5px;font-variant-numeric:tabular-nums}
th,td{text-align:right;padding:5px 9px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-weight:500;color:var(--ink-3);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;white-space:nowrap}
td:first-child,th:first-child{text-align:left}
td.name{font-weight:500;color:var(--ink);white-space:nowrap}
.tablewrap{overflow-x:auto;margin:8px 0 14px;
  /* scroll cues: a soft shadow on whichever edge still hides columns (fades out at the end), plus a thin always-visible scrollbar */
  background:linear-gradient(to right,var(--bg) 30%,transparent),linear-gradient(to left,var(--bg) 30%,transparent) 100% 0,
             radial-gradient(farthest-side at 0 50%,rgba(20,43,60,.22),transparent),radial-gradient(farthest-side at 100% 50%,rgba(20,43,60,.22),transparent) 100% 0;
  background-repeat:no-repeat;background-size:48px 100%,48px 100%,16px 100%,16px 100%;background-attachment:local,local,scroll,scroll}
.tablewrap::-webkit-scrollbar{height:6px}.tablewrap::-webkit-scrollbar-track{background:transparent}.tablewrap::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:3px}
.tablewrap table{background:transparent}
.g-opus5{color:var(--s1)} .g-gen5{color:var(--s3)} .g-unmasked{color:var(--s2)} .g-chat4x{color:var(--s4)} .g-base{color:var(--neutral)} .g-arc{color:var(--s7)} .g-ablation{color:var(--s5)} .g-ladder{color:var(--s6)} .g-gemini{color:var(--s8)}
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:6px;vertical-align:middle;background:currentColor}
.legend{display:flex;flex-wrap:wrap;gap:6px 16px;font-family:"IBM Plex Sans",sans-serif;font-size:12.5px;color:var(--ink-2);margin:6px 0 10px}
.chart{margin:10px 0 18px;max-width:var(--wide)}
/* SVG charts scale with their box: cap the rendered width so type stays near its designed size, and give a floor below which the chart scrolls sideways like a table */
.chart{overflow-x:auto}
.chart svg{width:100%;max-width:820px;min-width:560px;height:auto;display:block;overflow:visible}
.chart-head{margin:0 0 4px;min-width:0}
.chart-title{font-family:"IBM Plex Sans",sans-serif;font-size:13px;font-weight:600;color:var(--ink);line-height:1.3;overflow-wrap:anywhere}
.chart-sub{font-family:"IBM Plex Sans",sans-serif;font-size:12px;color:var(--ink-3);line-height:1.35;overflow-wrap:anywhere}
.chart-legend{display:flex;flex-wrap:wrap;gap:4px 16px;margin-top:6px;font-family:"IBM Plex Sans",sans-serif;font-size:12px;color:var(--ink-2);line-height:1.3}
.chart-key{display:inline-flex;align-items:center;gap:6px;min-width:0;overflow-wrap:anywhere}
.chart-key svg{flex:0 0 26px;width:26px;min-width:0;max-width:none;height:10px;overflow:visible}
.chart .bar{fill:currentColor}
.chart .lbl{font-family:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;font-size:12px;fill:var(--ink-2)}
.chart .lbl.sub{font-size:10.5px;fill:var(--ink-3)}
.chart .val{font-family:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;font-size:11.5px;fill:var(--ink);font-variant-numeric:tabular-nums}
.chart .axis{stroke:var(--line-2);stroke-width:1}
.chart .grid{stroke:var(--line);stroke-width:1}
.chart .tick{font-family:"IBM Plex Sans",sans-serif;font-size:11px;fill:var(--ink-3)}
.chart .title{font-family:"IBM Plex Sans",sans-serif;font-size:13px;font-weight:600;fill:var(--ink)}
.chart .subtitle{font-family:"IBM Plex Sans",sans-serif;font-size:12px;fill:var(--ink-3)}
.tip{position:fixed;pointer-events:none;background:var(--panel);color:var(--ink);border:1px solid var(--line-2);border-radius:4px;padding:6px 9px;font:12.5px "IBM Plex Sans",sans-serif;box-shadow:0 2px 8px rgba(0,0,0,.15);display:none;z-index:20;max-width:360px}
.callout{border-left:3px solid var(--accent);padding:8px 14px;background:var(--panel);margin:12px 0;max-width:var(--measure)}
.callout.warn{border-left-color:var(--s2)}
ol.claims{padding-left:1.2em;max-width:var(--measure)}
ol.claims li{margin:10px 0}
ol.claims .ev{display:block;font-size:13.5px;color:var(--ink-2)}
ol.claims .threat{display:block;font-size:13.5px;color:var(--ink-2)}
ol.claims .threat::before{content:"threat — ";color:var(--s2);font-family:"IBM Plex Sans",sans-serif;font-size:11px;letter-spacing:.08em;text-transform:uppercase}
ol.claims .ev::before{content:"evidence — ";color:var(--accent-ink);font-family:"IBM Plex Sans",sans-serif;font-size:11px;letter-spacing:.08em;text-transform:uppercase}
pre.txt{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:13px;line-height:1.5;white-space:pre-wrap;overflow-wrap:anywhere;background:var(--panel-2);padding:12px 14px;border-radius:4px;margin:0;max-height:520px;overflow:auto}
pre.txt.full{max-height:none}
/* explorer */
.filters{display:flex;flex-wrap:wrap;gap:8px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:10px 12px;margin:10px 0;font-family:"IBM Plex Sans",sans-serif;font-size:13px}
.filters label{display:flex;gap:4px;align-items:center;color:var(--ink-2)}
.filters select,.filters input{font:13px "IBM Plex Sans",sans-serif;padding:4px 6px;border:1px solid var(--line-2);border-radius:4px;background:var(--panel);color:var(--ink);max-width:180px}
.filters button{font:13px "IBM Plex Sans",sans-serif;padding:5px 10px;border:1px solid var(--line-2);border-radius:4px;background:var(--panel-2);color:var(--ink);cursor:pointer}
.filters button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.explorer{display:grid;grid-template-columns:minmax(300px,1fr) minmax(360px,1.3fr);gap:14px}
@media (max-width:900px){.explorer{grid-template-columns:1fr}}
.list{display:flex;flex-direction:column;gap:6px;max-height:78vh;overflow:auto;padding-right:4px}
.item{border:1px solid var(--line);border-radius:5px;padding:8px 10px;background:var(--panel);cursor:pointer}
.item:hover,.item.on{border-color:var(--accent)}
.item .hd{display:flex;flex-wrap:wrap;gap:4px 10px;font-family:"IBM Plex Sans",sans-serif;font-size:11.5px;color:var(--ink-3);margin-bottom:4px}
.item .hd b{color:var(--ink);font-weight:500}
.item .tx{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:12px;color:var(--ink-2);white-space:pre-wrap;overflow-wrap:anywhere;max-height:5.5em;overflow:hidden}
.badge{display:inline-block;font-family:"IBM Plex Sans",sans-serif;font-size:11px;padding:1px 6px;border-radius:3px;background:var(--panel-2);color:var(--ink-2);border:1px solid var(--line)}
.badge.theta{font-variant-numeric:tabular-nums;font-weight:600;color:var(--ink)}
.badge.sev{background:color-mix(in oklab,var(--crit) 18%,var(--panel));border-color:color-mix(in oklab,var(--crit) 40%,var(--line));color:var(--ink)}
.detail{position:sticky;top:64px;max-height:calc(100vh - 80px);overflow:auto;background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:14px 16px}
.detail .kv{display:grid;grid-template-columns:max-content 1fr;gap:3px 12px;font-family:"IBM Plex Sans",sans-serif;font-size:12.5px;margin:8px 0}
.detail .kv div:nth-child(odd){color:var(--ink-3)}
.detail .prompt{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:12.5px;background:var(--panel-2);padding:8px 10px;border-radius:4px;white-space:pre-wrap;border-left:3px solid var(--accent)}
.pager{display:flex;gap:8px;align-items:center;font-family:"IBM Plex Sans",sans-serif;font-size:13px;color:var(--ink-2);margin:6px 0}
.pager button{font:12.5px "IBM Plex Sans",sans-serif;padding:3px 9px;border:1px solid var(--line-2);border-radius:4px;background:var(--panel);color:var(--ink);cursor:pointer}
.rung{display:grid;grid-template-columns:150px 1fr;gap:16px;padding:16px 0;border-top:1px solid var(--line)}
.rung .rail{font-family:"IBM Plex Sans",sans-serif;font-size:12.5px;color:var(--ink-2)}
.rung .rail b{display:block;font-size:20px;color:var(--ink);font-weight:600}
@media (max-width:640px){.rung{grid-template-columns:1fr}}
kbd{font:11.5px "IBM Plex Mono",monospace;border:1px solid var(--line-2);border-bottom-width:2px;border-radius:3px;padding:0 4px}

.story{max-width:var(--measure);border-left:3px solid var(--s1);padding-left:16px;margin:8px 0 18px}
.story p{margin:0 0 10px}

.row2{display:flex;flex-wrap:wrap;gap:18px}
.row2>div{flex:1 1 340px;min-width:0}
details summary{cursor:pointer;color:var(--muted);margin:8px 0}

.brief{margin:14px 0 6px}
.brief p{margin:0 0 9px;max-width:var(--measure)}

.cj-fig{margin:14px 0 18px;max-width:var(--wide)}.cj-fig img{width:100%;height:auto;display:block;border:1px solid var(--line);border-radius:4px;background:#fff}
/* Narrow screens: the page menu becomes a full-width bar under the site header naming the current section; tap opens the list
   as a panel over the page. The site header hides while scrolling down and returns on the way up; the bar stays and moves up
   to the top edge when the header is hidden. Component-level: independent of the desktop geometry. */
.toc-overlay{position:fixed;inset:0;z-index:20;background:rgba(20,43,60,.10)}
.toc-overlay[hidden]{display:none}
.toc-overlay-panel{position:absolute;top:0;left:0;width:100%;max-height:80vh;overflow:auto;background:var(--panel);border-bottom:1px solid var(--line);box-shadow:0 12px 40px rgba(20,43,60,.15);padding:22px 20px}
.toc-overlay-panel .page-toc,.toc-overlay-panel .essay-contents{position:static;border-right:0;padding:0;max-height:none;overflow:visible;gap:0;display:block}
.toc-overlay-panel .page-toc-label,.toc-overlay-panel .essay-label{display:block;margin-bottom:10px}
.toc-overlay-panel a{display:block;border-right:0;margin:0;padding:11px 0;border-bottom:1px solid var(--line);font-size:15px;line-height:1.35}
.toc-overlay-panel a.on,.toc-overlay-panel a.active{border-right:0}
.toc-bar{display:none}
@media (max-width:900px){
  .toc-bar{display:flex;width:calc(100% + 2*var(--gutter));text-align:left;align-items:center;justify-content:space-between;gap:12px;position:sticky;top:var(--hdr-h,0px);z-index:6;margin:0 calc(-1*var(--gutter));padding:12px var(--gutter);background:var(--bg);border:0;border-bottom:1px solid var(--line);border-radius:0;font:500 15px "IBM Plex Sans","Helvetica Neue",Arial,sans-serif;color:var(--ink);cursor:pointer;transition:top .25s}
  .toc-bar[hidden]{display:none}
  .toc-bar::after{content:"";width:8px;height:8px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-3px);flex:none;opacity:.7}
  .toc-bar-current:empty::before{content:"On this page";color:var(--ink-3)}
  header.top{position:sticky;top:0;z-index:7;transition:transform .25s}
  body.hdr-hidden header.top{transform:translateY(-100%)}
  body.hdr-hidden .toc-bar{top:0}
}

.row2.stack{display:block}.row2.stack>div{max-width:760px}

.lineage-overview,.lineage-detail-row{max-width:760px}
.lineage-plots{display:grid;grid-template-columns:minmax(0,1fr);gap:10px}
.lineage-plots .chart{margin:4px 0 12px}
.lineage-overview .chart svg,.lineage-detail-row .chart svg{max-width:760px}
.lineage-detail-row{display:block}
.lineage-detail-row>div{width:100%;max-width:760px}
.lineage-detail-row label.small{display:block}
#ln-dim{display:block;width:100%;max-width:100%}
.lead-legend{margin:8px 0 14px}
.results-select{display:block;max-width:760px;margin:10px 0 6px}
.results-select select{display:block;width:100%;max-width:100%}