:root{--bg:#f6f7f9;--fg:#1a1a1a;--muted:#5a5d64;--card:#fff;--border:#d8dae0;--grid:#e8eaee;--spy:#767676;--warn:#7a4f00;--warnbg:#fff6e0;--accent:#1a5fb4;--tip:#fff;--c0:#2a78d6;--c1:#eb6834;--c2:#1baf7a;--c3:#eda100;--c4:#e87ba4;--c5:#008300;--c6:#6250d6;--c7:#e34948;}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--bg:#121316;--fg:#e8e8e8;--muted:#a3a6ad;--card:#1b1c20;--border:#34363c;--grid:#2a2c31;--spy:#9a9a9a;--warn:#f0c674;--warnbg:#2b2413;--accent:#6ea8fe;--tip:#2a2c33;--c0:#3987e5;--c1:#d95926;--c2:#199e70;--c3:#c98500;--c4:#d55181;--c5:#008300;--c6:#9085e9;--c7:#e66767;}}
:root[data-theme="dark"]{--bg:#121316;--fg:#e8e8e8;--muted:#a3a6ad;--card:#1b1c20;--border:#34363c;--grid:#2a2c31;--spy:#9a9a9a;--warn:#f0c674;--warnbg:#2b2413;--accent:#6ea8fe;--tip:#2a2c33;--c0:#3987e5;--c1:#d95926;--c2:#199e70;--c3:#c98500;--c4:#d55181;--c5:#008300;--c6:#9085e9;--c7:#e66767;}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
a{color:var(--accent)}
main{max-width:900px;margin:0 auto;padding:16px}
.topbar{background:var(--card);border-bottom:1px solid var(--border)}
nav{max-width:1100px;margin:0 auto;padding:8px 16px;display:flex;flex-wrap:wrap;gap:4px 6px;align-items:center}
nav .brand{font-weight:700;margin-right:4px}
nav a.nl{padding:5px 8px;border-radius:6px;text-decoration:none;color:var(--fg);font-size:.92rem;border:1px solid transparent}
nav a.nl:hover{border-color:var(--border)}
nav a.nl[aria-current="page"]{background:var(--accent);color:#fff;font-weight:600}
#theme-toggle{margin-left:auto;background:none;border:1px solid var(--border);color:var(--fg);border-radius:6px;padding:4px 10px;font:inherit;font-size:.85rem;cursor:pointer}
h1{font-size:1.6rem;margin:8px 0 4px;line-height:1.25}
.lede{color:var(--muted);margin:0 0 12px}
section{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:12px 16px;margin:16px 0;overflow-wrap:anywhere}
h2{font-size:1.2rem;margin:4px 0 8px}h3{font-size:1.02rem;margin:16px 0 6px}h4,h5{margin:12px 0 4px}
p{margin:8px 0}
.warn{background:var(--warnbg);color:var(--warn);padding:8px 10px;border-radius:6px}
.notyet{color:var(--muted);font-style:italic}
.placeholder{border:2px dashed var(--border);border-radius:8px;padding:8px 12px;color:var(--muted)}
.take{color:var(--muted);font-size:.9rem;margin:2px 0 8px}
figure{margin:12px 0}figcaption{font-weight:600;font-size:.95rem;margin-bottom:4px}
.scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}
table{border-collapse:collapse;font-size:.85rem;min-width:620px;width:100%}

th,td{text-align:left;padding:4px 8px;border-bottom:1px solid var(--border);vertical-align:top;overflow-wrap:normal}
th{color:var(--muted);font-weight:600;white-space:nowrap}
details.datatable{margin:6px 0;font-size:.9rem}details summary{cursor:pointer;color:var(--accent)}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:16px 0}
.tile{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:12px 16px}
.tile .big{font-size:2rem;font-weight:700;line-height:1.15}.tile .lab{font-weight:600}.tile .sub{color:var(--muted);font-size:.88rem}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:12px}
.card{display:block;background:var(--card);border:1px solid var(--border);border-radius:8px;padding:12px 16px;text-decoration:none;color:var(--fg)}
.card:hover{border-color:var(--accent)}.card b{display:block;color:var(--accent)}.card span{color:var(--muted);font-size:.9rem}
.bullets li{margin:8px 0}
.chartwrap{position:relative;max-width:560px}.chartwrap.cal{max-width:360px}
.chart{width:100%;height:auto;display:block;touch-action:pan-y}
.chart text{fill:var(--muted);font-size:12px;stroke:none}.chart .axis{font-size:12.5px}.chart .cnt{font-size:11px}
.chart .endlabel{font-size:12px;font-weight:600}
.chart .grid{stroke:var(--grid);stroke-width:1}.chart .zero{stroke:var(--muted);stroke-width:1}
.chart .ln{fill:none;stroke-width:2}.chart .pt{stroke:var(--card);stroke-width:1}
.chart .bm.ln{stroke:var(--spy);fill:none;stroke-width:2;stroke-dasharray:6 4}.chart circle.bm{fill:var(--spy)}
.chart .bar.bm{fill:var(--spy);stroke:var(--fg);stroke-width:1;stroke-dasharray:3 2}
.chart .bar{stroke:none}.chart .bar.bm{stroke:var(--fg)}
.chart text.endlabel.bm{fill:var(--spy)}
.chart .diag{stroke:var(--spy);stroke-dasharray:5 4;stroke-width:1.5}
.chart .cal-pt{fill:var(--c0);stroke:var(--card);stroke-width:1.5}
.chart .xhair{stroke:var(--muted);stroke-width:1;stroke-dasharray:3 3}
.s0{stroke:var(--c0);fill:var(--c0)}.sw.s0{background:var(--c0)}.s1{stroke:var(--c1);fill:var(--c1)}.sw.s1{background:var(--c1)}.s2{stroke:var(--c2);fill:var(--c2)}.sw.s2{background:var(--c2)}.s3{stroke:var(--c3);fill:var(--c3)}.sw.s3{background:var(--c3)}.s4{stroke:var(--c4);fill:var(--c4)}.sw.s4{background:var(--c4)}.s5{stroke:var(--c5);fill:var(--c5)}.sw.s5{background:var(--c5)}.s6{stroke:var(--c6);fill:var(--c6)}.sw.s6{background:var(--c6)}.s7{stroke:var(--c7);fill:var(--c7)}.sw.s7{background:var(--c7)}
.chart text.endlabel.s0{fill:var(--c0)}.chart text.endlabel.s1{fill:var(--c1)}.chart text.endlabel.s2{fill:var(--c2)}.chart text.endlabel.s3{fill:var(--c3)}.chart text.endlabel.s4{fill:var(--c4)}.chart text.endlabel.s5{fill:var(--c5)}.chart text.endlabel.s6{fill:var(--c6)}.chart text.endlabel.s7{fill:var(--c7)}
.legend{list-style:none;display:flex;flex-wrap:wrap;gap:4px 14px;padding:0;margin:6px 0;font-size:.85rem}
.sw{display:inline-block;width:14px;height:8px;margin-right:6px;vertical-align:middle;border-radius:2px}
.sw.bm{background:none;border-top:3px dashed var(--spy);height:0;border-radius:0}
.tip{position:fixed;z-index:10;pointer-events:none;background:var(--tip);color:var(--fg);border:1px solid var(--border);border-radius:6px;padding:6px 9px;font-size:.82rem;box-shadow:0 2px 8px rgba(0,0,0,.25);max-width:240px;white-space:pre-line}
.tip b{display:block}
.digest ul,.digest ol{padding-left:20px;margin:4px 0}
.timeline{list-style:none;padding:0;margin:0}.timeline li{border-left:3px solid var(--border);padding:2px 0 8px 12px;margin-left:4px}
.timeline .who{font-size:.75rem;font-weight:700;text-transform:uppercase;color:var(--muted)}.timeline .who.board{color:var(--accent)}
code{font-size:.88em;background:var(--grid);padding:1px 4px;border-radius:4px;overflow-wrap:anywhere}
footer{max-width:900px;margin:0 auto;padding:8px 16px 32px;color:var(--muted);font-size:.85rem}

.diagram{width:100%;max-width:420px;height:auto;display:block;margin:8px auto}
.diagram .dg-box{fill:var(--card);stroke:var(--border);stroke-width:1.5}
.diagram .dg-num{fill:var(--accent)}.diagram .dg-n{fill:#fff;font-size:13px;font-weight:700}
.diagram .dg-t{fill:var(--fg);font-size:13.5px;font-weight:700}.diagram .dg-s{fill:var(--muted);font-size:11px}
.diagram .dg-line{stroke:var(--muted);stroke-width:2}.diagram .dg-head{fill:var(--muted)}
.two{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}.two ul{padding-left:20px;margin:4px 0}
table.stack td:first-child{min-width:9em}
@media (max-width:640px){
 table.stack{min-width:0}table.stack thead{display:none}
 table.stack,table.stack tbody,table.stack tr,table.stack td{display:block;width:100%}
 table.stack tr{border:1px solid var(--border);border-radius:6px;margin:0 0 10px;padding:4px 0}
 table.stack td{border:0;padding:3px 10px}
 table.stack td::before{content:attr(data-label);display:block;color:var(--muted);font-size:.75rem;font-weight:600}
}
tr.diff td{background:var(--warnbg)}.muted{color:var(--muted)}
.gcards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:12px}
.gcard{border:1px solid var(--border);border-radius:8px;padding:10px 14px;background:var(--bg);scroll-margin-top:12px;min-width:0}
.gcard:target{outline:2px solid var(--accent)}
.gcard h3{margin:2px 0 6px;font-size:1rem}.gcard h3 code{font-weight:400;font-size:.75rem}
.gcard .desc{margin:6px 0}
.badges{margin:4px 0;display:flex;flex-wrap:wrap;gap:6px}
.badge{font-size:.72rem;font-weight:700;border-radius:10px;padding:1px 8px;border:1px solid var(--border);background:var(--card)}
.badge.b-textbook{border-color:var(--c0)}.badge.b-evolved{border-color:var(--c2)}.badge.b-forward{border-color:var(--c3)}.badge.b-blend{border-color:var(--c6)}
.sc{margin:8px 0 4px}
.sr{display:grid;grid-template-columns:8.2em 1fr 5.4em;gap:8px;align-items:center;font-size:.8rem;padding:1px 0}
.sr .sl{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sr .sv{text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums;font-weight:600}
.sr .bar{position:relative;height:8px;background:var(--grid);border-radius:4px}
.sr .bar b{position:absolute;left:0;top:0;bottom:0;background:var(--c0);border-radius:4px;opacity:.45}
.sr .bar i{position:absolute;top:-3px;width:4px;height:14px;margin-left:-2px;background:var(--c0);border-radius:2px}
.sr.off{opacity:.62}.sr.off .bar b,.sr.off .bar i{background:var(--muted)}.sr.off .sv{font-weight:400;font-style:italic}
.chips{display:flex;flex-wrap:wrap;gap:4px 6px;margin:6px 0}
.chip{font-size:.75rem;border:1px solid var(--border);border-radius:6px;padding:1px 6px}.chip.off{opacity:.62;font-style:italic}
details.fold>summary{cursor:pointer}details.fold>summary h2{display:inline}

.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
nav details.dd{position:relative}
nav details.dd>summary{list-style:none;cursor:pointer;display:inline-block;padding:5px 8px;border-radius:6px;font-size:.92rem;color:var(--fg);border:1px solid transparent}
nav details.dd>summary::-webkit-details-marker{display:none}
nav details.dd>summary::after{content:"";display:inline-block;margin-left:6px;width:.45em;height:.45em;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:translateY(-.15em) rotate(45deg)}
nav details.dd[open]>summary::after{transform:translateY(.05em) rotate(-135deg)}
nav details.dd>summary:hover,nav details.dd[open]>summary{border-color:var(--border)}
nav details.dd.cur>summary{border-color:var(--accent);font-weight:600}
nav .ddp{position:absolute;top:calc(100% + 4px);left:0;min-width:210px;background:var(--card);border:1px solid var(--border);border-radius:8px;padding:4px;z-index:30;box-shadow:0 6px 18px rgba(0,0,0,.2);display:flex;flex-direction:column}
nav .ddp a.nl{display:block;padding:7px 10px}
@media (max-width:700px){
 nav details.dd[open]{flex-basis:100%}
 nav .ddp{position:static;box-shadow:none;margin-top:4px}
 #theme-toggle{margin-left:0}
}
main.wide{max-width:none;padding:0}
.pagehead{max-width:1000px;margin:0 auto;padding:16px}
.slides{counter-reset:none}
section.slide{background:var(--bg);border:0;border-top:1px solid var(--border);border-radius:0;margin:0;padding:0;min-height:min(86vh,760px);display:flex;align-items:center}
section.slide:nth-child(even){background:var(--card)}
.slide-in{max-width:1000px;width:100%;margin:0 auto;padding:40px 16px}
.slide .kicker{color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:.06em;font-size:.85rem;margin:0 0 8px}
.slide h2{font-size:clamp(1.9rem,5.2vw,3.4rem);line-height:1.12;margin:0 0 18px}
.slide p,.slide li{font-size:clamp(1.05rem,2.1vw,1.45rem);line-height:1.45}
.slide p.lead{font-size:clamp(1.25rem,2.8vw,1.9rem);font-weight:600;line-height:1.3}
.slide .muted,.slide .sfoot{color:var(--muted);font-size:clamp(.95rem,1.6vw,1.1rem)}
.slide ul.big-list,.slide ol.big-list{padding-left:1.2em}
.slide .big-list li{margin:.5em 0}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin:16px 0}
.stat{border:1px solid var(--border);border-radius:10px;padding:14px 18px;background:var(--bg)}
section.slide:nth-child(even) .stat{background:var(--bg)}
.stat .big{font-size:clamp(2.3rem,6vw,4rem);font-weight:800;line-height:1.05}
.stat .slab{font-weight:700;margin-top:4px;font-size:1.05rem}
.stat .ssub{color:var(--muted);font-size:.98rem;margin-top:6px;line-height:1.4}
.tag{display:inline-block;font-size:.72rem;font-weight:700;padding:1px 7px;border-radius:999px;border:1px solid var(--border);color:var(--muted);background:var(--bg);white-space:nowrap;vertical-align:middle}
.tag.cur{border-color:var(--accent);color:var(--accent)}
.presentbar{max-width:1000px;margin:0 auto;padding:0 16px 12px}
#present,#present-exit{background:var(--accent);color:#fff;border:0;border-radius:8px;padding:8px 18px;font:inherit;font-weight:700;cursor:pointer}
#present[hidden]{display:none}
html.presenting .topbar,html.presenting footer,html.presenting .pagehead,html.presenting .presentbar{display:none}
html.presenting{scroll-snap-type:y mandatory}
html.presenting section.slide{min-height:100vh;scroll-snap-align:start;border-top:0}
html.presenting .slide h2{font-size:clamp(2.2rem,6vw,4.4rem)}
#present-ui{position:fixed;right:12px;bottom:12px;z-index:40;display:none;gap:10px;align-items:center;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:6px 10px;font-size:.9rem}
html.presenting #present-ui{display:flex}
#present-exit{padding:4px 12px;font-size:.85rem}
.pipeline{max-width:460px}
.pipeline a:hover .dg-box,.pipeline a:focus .dg-box{stroke:var(--accent)}
.fool{border-color:var(--warn);background:var(--warnbg)}
.fool,.fool li{color:var(--fg)}
.fool h2{color:var(--warn)}
section[id^="st-"] p{max-width:70ch}
.embed{border:1px solid var(--border);border-left:5px solid var(--muted);border-radius:6px;background:var(--bg);padding:10px 14px;margin:10px 0;font-size:.92rem;overflow-wrap:anywhere}
.embed .etitle{font-weight:700;font-size:1.02rem;margin-bottom:4px}
.embed .edesc{color:var(--muted);margin-bottom:8px}
.embed .efield{margin:8px 0}
.embed .ename{font-weight:700}
.embed code{white-space:pre-wrap}
.embed .digest ul{padding-left:20px;margin:2px 0}
.badge{display:inline-block;min-width:1.4em;text-align:center;background:var(--accent);color:#fff;border-radius:999px;font-size:.75rem;font-weight:700;padding:0 6px;margin-right:4px}
ol.annot{padding-left:22px}ol.annot li{margin:6px 0}
dl.defs dt{font-weight:700;margin-top:10px}dl.defs dd{margin:2px 0 0 0}
.jump a{display:inline-block;padding:2px 7px;margin:0 2px 4px 0;border:1px solid var(--border);border-radius:6px;text-decoration:none}
dl.glossary{margin:0}
dl.glossary .term{padding:8px 0;border-bottom:1px solid var(--border);scroll-margin-top:12px}
dl.glossary dt{font-weight:700}dl.glossary dd{margin:2px 0 0}
dl.glossary .where{display:block;color:var(--muted);font-size:.88rem;margin-top:2px}
h2.az{margin:14px 0 2px;color:var(--accent);scroll-margin-top:12px}
a.gl{text-decoration-style:dotted;text-underline-offset:3px}
td .tag{margin-top:2px}
@media (prefers-reduced-motion:reduce){html.presenting{scroll-snap-type:none}}