:root{
  --paper:#EEF1F5; --surface:#FFFFFF; --ink:#0F1B2D; --muted:#566275; --line:#D3D9E2;
  --verified:#2540D9; --mask:#B96A00; --bad:#C4204A; --good:#12805C;
  --c0:#2540D9; --c1:#E08A1E; --c2:#12A07F; --c3:#C23B7B;
  --font:"Bahnschrift","DIN Alternate","Segoe UI Variable Text","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"Cascadia Mono","SF Mono",Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
  --paper:#0C1422; --surface:#121D30; --ink:#E7ECF4; --muted:#93A0B5; --line:#26344C;
  --verified:#7C93FF; --mask:#F0A646; --bad:#FF6B8B; --good:#4FD1A5;
  --c0:#6F8BFF; --c1:#F0A646; --c2:#3FD0AA; --c3:#F06FA8;}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 var(--font);-webkit-font-smoothing:antialiased}
a{color:inherit}
:focus-visible{outline:3px solid var(--verified);outline-offset:2px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
code{font:0.88em var(--mono);background:color-mix(in srgb,var(--ink) 7%,transparent);padding:.08em .35em;border-radius:3px}
.bar{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:28px;padding:10px max(16px,calc((100vw - 1180px)/2));background:color-mix(in srgb,var(--paper) 90%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:-.01em;text-decoration:none}
.bar nav{display:flex;gap:20px;flex:1;overflow-x:auto;white-space:nowrap}
.bar nav a{text-decoration:none;color:var(--muted);font-size:14px;padding:4px 0}
.bar nav a:hover{color:var(--ink)}
.conn{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);white-space:nowrap}
.conn i{width:9px;height:9px;border-radius:50%;background:var(--bad)}
.conn.on i{background:var(--good)}
main{max-width:1180px;margin:0 auto;padding:0 16px 80px}
section{padding-top:56px;scroll-margin-top:50px}
h1{font-size:clamp(28px,4.6vw,52px);line-height:1.06;letter-spacing:-.025em;font-weight:700;margin:0;max-width:22ch}
h2{font-size:clamp(22px,2.6vw,30px);letter-spacing:-.015em;line-height:1.15;margin:0 0 14px}
h3{font-size:18px;margin:0 0 6px;letter-spacing:-.005em}
.hero{padding-top:56px}
.lede{max-width:66ch;font-size:18px;color:var(--muted);margin:22px 0 0}
.small{font-size:14px;color:var(--muted)}
/* toolbar */
.toolbar{display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;margin-bottom:12px}
.group{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px}
button,select{font:inherit;font-size:14px;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:8px 14px;cursor:pointer}
button:hover{border-color:var(--ink)}
button.primary{background:var(--ink);color:var(--paper);border-color:var(--ink);font-weight:600}
button:disabled{opacity:.5;cursor:default}
label{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px}
select{padding:7px 8px}
.mynodes{display:flex;flex-wrap:wrap;gap:8px;min-height:6px;margin-bottom:12px}
.chip{display:flex;align-items:center;gap:10px;font-size:13px;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:4px 6px 4px 12px}
.chip b{font-weight:600}.chip.bad{border-color:var(--bad);color:var(--bad)}
.chip button{padding:2px 10px;border-radius:999px;font-size:12px}
/* dashboard */
.grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:16px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:8px;margin:0}
.plot{padding:12px}
.plot canvas{display:block;width:100%;aspect-ratio:1;border-radius:4px}
figcaption{font-size:13px;color:var(--muted);margin-top:10px;max-width:60ch}
.side{display:flex;flex-direction:column;gap:16px;min-width:0}
.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.tile{background:var(--surface);padding:12px 14px}
.tile b{display:block;font-size:24px;letter-spacing:-.02em;font-variant-numeric:tabular-nums;line-height:1.15}
.tile span{font-size:12.5px;color:var(--muted)}
.tile.bad b{color:var(--bad)}
.chart{padding:12px;flex:1;display:flex;flex-direction:column}
.chart canvas{width:100%;flex:1;min-height:220px;display:block}
.chart figcaption{display:flex;gap:8px;align-items:center}
.key{display:inline-block;width:18px;height:3px;margin-left:10px}.key:first-child{margin-left:0}
.k-loss{background:var(--ink)}.k-acc{background:var(--verified)}
.nodes{margin-top:16px;padding:6px 16px 12px;overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums}
caption{text-align:left;font-weight:600;padding:12px 0 8px}
th{font-weight:500;color:var(--muted);text-align:left;font-size:12.5px;padding:6px 10px 6px 0;border-bottom:1px solid var(--line)}
td{padding:8px 10px 8px 0;border-bottom:1px solid color-mix(in srgb,var(--line) 60%,transparent)}
.num{text-align:right}th.num{text-align:right}
tr.banned td{color:var(--bad)}
.bar-s{display:inline-block;height:6px;background:var(--verified);border-radius:2px;vertical-align:middle;margin-right:8px}
.nodes .none{color:var(--muted);padding:14px 0}
.events{list-style:none;margin:8px 0 0;padding:0;font-size:13px}
.events li{padding:6px 0;color:var(--bad)}
/* inspector */
.inspect{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.5fr);gap:32px;align-items:start}
.col-text p{max-width:56ch;color:var(--muted)}
.meta{display:grid;grid-template-columns:auto 1fr;gap:4px 16px;margin:18px 0 0;font-size:14px}
.meta dt{color:var(--muted)}.meta dd{margin:0;font-variant-numeric:tabular-nums}
.verdict-ok{color:var(--good);font-weight:600}.verdict-bad{color:var(--bad);font-weight:600}
.mats{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.mats .empty{grid-column:1/-1;padding:40px;border:1px dashed var(--line);border-radius:8px;color:var(--muted)}
.mat{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:12px;min-width:0}
.mat h3{font-size:14px;margin:0 0 2px}.mat p{font-size:12.5px;color:var(--muted);margin:0 0 10px}
.mat.blind{border-color:var(--mask)}
.mat.blind h3{color:var(--mask)}
.cells{display:grid;gap:2px;font:11px/1 var(--mono)}
.cells div{padding:7px 3px;text-align:center;border-radius:2px;overflow:hidden;white-space:nowrap;text-overflow:clip;color:#fff;text-shadow:0 0 2px rgba(0,0,0,.45)}
/* how */
.how .intro{font-size:18px;max-width:68ch;color:var(--muted)}
.diagram{margin:28px 0;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:12px}
.diagram svg{width:100%;height:auto;display:block;font:14px var(--font);fill:var(--ink)}
.dg-box rect:first-child{fill:none;stroke:var(--ink);stroke-width:1.5}
.dg-h{font-weight:700;font-size:16px}.dg-s{fill:var(--muted);font-size:12.5px}.dg-lab{font-size:13px;fill:var(--ink);font-weight:600}
.dg-step{fill:color-mix(in srgb,var(--ink) 6%,transparent)}
.dg-mask{fill:color-mix(in srgb,var(--mask) 16%,transparent);stroke:var(--mask)}
.dg-ver{fill:color-mix(in srgb,var(--verified) 14%,transparent);stroke:var(--verified)}
.dg-bad rect:first-child{stroke:var(--bad)}.dg-bad .dg-h{fill:var(--bad)}
.steps{list-style:none;counter-reset:s;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:36px 48px}
.steps li{counter-increment:s;position:relative;padding-left:44px}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--ink);color:var(--paper);display:grid;place-items:center;font-weight:700;font-size:14px}
.steps p{margin:0;color:var(--muted);max-width:56ch}
.steps code{color:var(--ink)}
/* bench */
.bench{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.5fr);gap:32px;align-items:start}
.bench-out{display:flex;flex-direction:column;gap:20px}
.brow h3{font-size:14px;font-weight:600;margin:0 0 8px;color:var(--muted)}
.brow .l{display:grid;grid-template-columns:minmax(150px,230px) 1fr 150px;gap:10px;align-items:center;font-size:13.5px;margin:5px 0}
.brow .track{background:color-mix(in srgb,var(--ink) 7%,transparent);height:14px;border-radius:2px}
.brow .fill{height:100%;background:var(--ink);border-radius:2px;transition:width .5s}
.brow .l.top .fill{background:var(--verified)}
.brow .v{text-align:right;font-variant-numeric:tabular-nums}
/* limits */
.two{display:grid;grid-template-columns:1fr 1fr;gap:36px}
.two p{color:var(--muted);max-width:58ch;margin:0 0 12px}.two b{color:var(--ink)}
@media (max-width:900px){
  .grid,.inspect,.bench,.two,.steps{grid-template-columns:1fr}
  .tiles{grid-template-columns:repeat(2,1fr)}
  .bar nav{display:none}.bar{justify-content:space-between}
  .brow .l{grid-template-columns:1fr 70px}.brow .l .track{grid-column:1/-1;order:3}
}
@media (max-width:560px){.mats{grid-template-columns:1fr}}

.status{margin:0 0 10px;font-size:14px;min-height:20px;color:var(--muted)}
.status.warn{color:var(--mask);font-weight:600}
.brow .snark{font-size:13.5px;color:var(--muted);margin:10px 0 0}
.brow .snark b{color:var(--ink)}
var{font-style:italic}
button:disabled[title]{cursor:not-allowed}

/* model strip + collusion calculator */
.arch{margin:0 0 14px;display:flex;flex-wrap:wrap;gap:6px 24px;align-items:flex-end}
.arch-t{font-size:14px;color:var(--muted)}.arch-t b{color:var(--ink)}
.arch-l{display:flex;gap:6px;align-items:flex-end;height:66px}
.al{display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:2px}
.al i{display:block;width:16px;background:var(--mask);border-radius:2px;opacity:.8}
.al.in i{background:var(--ink)}.al.out i{background:var(--verified)}
.al em{font-style:normal;font-size:10px;color:var(--muted)}
.collude{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:36px;align-items:start}
.plain{padding-left:20px;margin:12px 0 0;color:var(--muted);max-width:60ch}.plain li{margin:0 0 10px}.plain b{color:var(--ink)}
.calc{padding:18px}.calc h3{margin:0 0 12px;font-size:16px}
.sl{display:grid;grid-template-columns:1fr auto;gap:2px 12px;margin:0 0 10px;font-size:14px;color:var(--muted)}.sl output{color:var(--ink);font-variant-numeric:tabular-nums}.sl input{grid-column:1/-1;width:100%}
#tbl-calc{width:100%;border-collapse:collapse;font-size:14px}#tbl-calc th{font-weight:600;text-align:left;color:var(--muted);padding:6px 4px;border-bottom:1px solid var(--line)}
#tbl-calc td{padding:6px 4px;border-bottom:1px solid var(--line)}#tbl-calc .num{text-align:right;font-variant-numeric:tabular-nums}#tbl-calc tr.cur td{font-weight:700;background:color-mix(in srgb,var(--mask) 10%,transparent)}
@media (max-width:860px){.collude{grid-template-columns:1fr}}

.fp{margin:0 0 12px;display:grid;grid-template-columns:auto 1fr;gap:6px 14px;font-size:14px}
.fp dt{color:var(--muted)}.fp dd{margin:0;font-family:var(--mono);font-size:12.5px;word-break:break-all}
.btns{margin:4px 0 10px}.out{margin:6px 0 0;min-height:1.2em}.out.ok{color:var(--verified);font-weight:600}.out.bad{color:var(--mask);font-weight:600}
.btnlike{display:inline-block;padding:6px 12px;border:1px solid var(--line);border-radius:6px;color:var(--ink);text-decoration:none;font-size:14px;background:var(--surface)}
.chip button.rc{margin-left:6px}

.lm{padding:6px 4px}.lm .hd{font-size:14px;color:var(--muted);margin:0 0 10px}.lm .hd b{color:var(--ink)}
.lm .pr{margin:0 0 12px}.lm .pq{font-weight:600;font-size:15px;margin:0 0 4px}.lm .pq span{color:var(--muted);font-weight:400}
.lm .ans{display:flex;flex-wrap:wrap;gap:4px}.lm .a{font:13px var(--mono);padding:3px 7px;border-radius:4px;border:1.5px solid var(--line)}
.lm .a.ok{border-color:var(--verified);color:var(--verified)}.lm .a.no{border-color:var(--c1);color:var(--c1)}
.plot canvas[hidden]{display:none}
dialog#consent{max-width:520px;width:calc(100% - 32px);border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);padding:22px}
dialog#consent::backdrop{background:rgba(10,14,24,.55)}
dialog#consent h2{margin:0 0 10px;font-size:20px}dialog#consent p,dialog#consent li{color:var(--muted);font-size:15px}dialog#consent ul{padding-left:20px;margin:8px 0 14px}
dialog#consent .row{display:flex;flex-wrap:wrap;gap:10px 18px;margin:8px 0}dialog#consent .row.end{justify-content:flex-end;margin-top:16px}
dialog#consent label{font-size:14px;color:var(--muted)}dialog#consent .chk{display:block;margin:6px 0}
.plainbtn{background:none}
.est{width:100%;border-collapse:collapse;font-size:14px;margin:8px 0}.est th{font-weight:600;text-align:left;color:var(--muted);padding:6px 4px;border-bottom:1px solid var(--line)}.est td{padding:6px 4px;border-bottom:1px solid var(--line)}.est .num{text-align:right}

.bar nav a[aria-current=page]{color:var(--ink);font-weight:600}
.story{max-width:820px;margin:0 auto;padding:36px 16px}.story h2{margin:0 0 14px}.story p,.story li{font-size:17px;line-height:1.6;color:var(--muted)}
.story.alt{max-width:none;background:var(--surface)}.story.alt>*{max-width:820px;margin-left:auto;margin-right:auto}
.steps3{padding-left:22px}.steps3 li{margin:10px 0}.steps3 b,.plain b{color:var(--ink)}.plain{padding-left:20px}.plain li{margin:8px 0}
.cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.btn{display:inline-block;padding:10px 16px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);text-decoration:none;font-weight:600}
.btn.primary{background:var(--ink);color:var(--surface);border-color:var(--ink)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px}.card{display:block;padding:16px;border:1px solid var(--line);border-radius:10px;background:var(--bg,var(--surface));text-decoration:none;color:var(--ink)}.card span{display:block;margin-top:6px;color:var(--muted);font-size:15px;line-height:1.5}.card:hover{border-color:var(--ink)}