:root{--bg:#14120b;--panel:#1b1913;--panel-2:#232019;--ink:#edecec;--muted:#b0ada4;--faint:#7f7c73;--line:#2b2820;--line-2:#433f35;--accent:#f0502c;--work:#f3b01c;--work-bg:#f3b01c1f;--ok:#7bc96f;--ok-bg:#7bc96f1f;--danger:#e05c7d;--danger-bg:#e05c7d24;--purple:#c963af;--purple-bg:#c963af24;--bar:60px;--prose:660px;--gutter:clamp(20px, 3vw, 64px);--mono:"IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;--sans:"Public Sans", system-ui, -apple-system, "Helvetica Neue", sans-serif;--hand:"Caveat", cursive;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}[hidden]{display:none!important}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;margin:0;font-size:18px;line-height:1.6;overflow-x:hidden}a{color:var(--accent);text-underline-offset:3px}a:hover{color:#ff6a47}code,.mono{font-family:var(--mono);font-size:.86em}p code,li code{border:1px solid var(--line-2);background:var(--panel);white-space:nowrap;border-radius:4px;padding:1px 5px}:is(a,button,select,input,[tabindex]):focus-visible{outline:2px solid var(--work);outline-offset:3px}:is(.mw-node,.bv-node,.bv-link):focus-visible{outline:none}.skip{z-index:120;background:var(--work);color:var(--bg);padding:10px 16px;position:fixed;top:8px;left:12px;transform:translateY(-160%)}.skip:focus{transform:none}.site-header{top:env(safe-area-inset-top,0px);z-index:80;height:var(--bar);background:var(--panel);border-bottom:1px solid var(--line-2);grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:24px;padding:0 32px;display:grid;position:sticky}.brand{width:max-content;color:var(--ink);align-items:center;gap:9px;text-decoration:none;display:inline-flex}.brand:hover{color:var(--ink)}.brand svg{width:24px;height:24px}.brand-word{font-size:15px;font-weight:700}.brand-hand{color:var(--work);font:600 21px/1 var(--hand);margin-left:-3px}.site-title{color:var(--ink);text-align:center;font-size:14px;font-weight:600}.site-controls{justify-self:end;align-items:center;gap:8px;min-width:0;display:flex}.chapter-picker{border:1px solid var(--line-2);background:var(--panel-2);border-radius:6px;align-items:center;width:300px;max-width:100%;display:flex;position:relative}.chapter-picker-number{color:var(--accent);font:600 12px var(--mono);pointer-events:none;position:absolute;left:12px}.chapter-picker select{appearance:none;width:100%;min-width:0;color:var(--ink);font:14px/20px var(--sans);text-overflow:ellipsis;cursor:pointer;background:0 0;border:0;padding:8px 30px 8px 40px}.chapter-picker select option{background:var(--panel-2)}.chapter-picker svg{fill:none;stroke:var(--muted);stroke-width:1.6px;pointer-events:none;position:absolute;right:12px}.progress{background:var(--line);height:3px;position:absolute;inset:auto 0 -1px}.progress span{background:var(--work);width:0;height:100%;transition:width .3s;display:block}.reader{padding:56px var(--gutter) 0}.chapter[hidden]{display:none!important}.col{width:100%;max-width:var(--prose);margin-inline:auto}.col>p,.col>ul,.col>ol{margin:0 0 20px}.col li+li{margin-top:6px}h1{letter-spacing:-.02em;text-wrap:balance;margin:0 0 26px;font-size:clamp(36px,3.3vw,48px);line-height:1.06}h2{letter-spacing:-.015em;margin:0 0 18px;font-size:32px;line-height:1.2}h2 .secno{color:var(--accent);font:600 12px/1.3 var(--mono);letter-spacing:.1em;margin:0 0 8px;display:block}h3{margin:40px 0 12px;font-size:21px;line-height:1.3}h2[tabindex="-1"]:focus{outline:none}.standfirst{color:var(--ink);font-size:21px;line-height:1.5}.byline{color:var(--ink);align-items:center;gap:10px;margin:0 0 28px;text-decoration:none;display:inline-flex}.byline img{border-radius:50%;width:32px;height:32px}.byline span{gap:2px;display:grid}.byline strong{font:600 13px/1.4 var(--sans)}.byline small{color:var(--faint);font:12px/1.4 var(--sans)}.hand{color:var(--work);font:600 24px/1.15 var(--hand)}.aside{border:1px solid var(--line-2);background:var(--panel);border-radius:8px;margin:28px 0;padding:16px 20px;font-size:16px;line-height:1.55}.aside>:first-child{margin-top:0}.aside>:last-child{margin-bottom:0}.aside-title{align-items:center;gap:10px;margin:0 0 8px;font-weight:600;display:flex}.claim{border:1px solid var(--line-2);color:var(--muted);font:500 10.5px/1.6 var(--mono);letter-spacing:.06em;text-transform:uppercase;white-space:nowrap;vertical-align:2px;border-radius:4px;align-items:center;gap:6px;padding:2px 8px;display:inline-flex}.claim:before{content:"";background:currentColor;border-radius:50%;width:7px;height:7px}.claim-model{color:var(--ok);border-color:#7bc96f66}.claim-derived{color:var(--work);border-color:#f3b01c66}.claim-proposed{color:var(--purple);border-color:#c963af73}.claim-observed{color:var(--muted);border-color:var(--line-2)}.claim-none{color:var(--faint);border-style:dashed}.claim-none:before{background:0 0;border:1px solid}.legend{padding:0;list-style:none}.legend li{grid-template-columns:130px 1fr;align-items:baseline;gap:12px;font-size:16px;display:grid}.legend .claim{justify-self:start}@media (max-width:600px){.legend li{grid-template-columns:1fr;gap:2px}}details.deep{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:8px 0 28px;font-size:16px}details.deep summary{color:var(--accent);cursor:pointer;padding:12px 0;font-weight:500}details.deep[open] summary{margin-bottom:4px}details.deep>:not(summary){color:var(--muted);margin-top:0}.demo-slot{width:100%;max-width:var(--demo-max-width,940px);min-width:0;color:var(--faint);margin:28px auto 40px;font-size:14px}.demo{border:1px solid var(--line-2);background:var(--panel);color:var(--ink);border-radius:8px;font-size:15px;position:relative;overflow:hidden}.demo-bar{border-bottom:1px solid var(--line);background:var(--panel-2);flex-wrap:wrap;align-items:center;gap:8px;padding:10px 12px;display:flex}.demo-bar .spacer{flex:1}.demo-bar .label{color:var(--faint);font:500 11px/1.2 var(--mono);letter-spacing:.08em;text-transform:uppercase}.btn{border:1px solid var(--line-2);min-height:34px;color:var(--ink);font:600 11.5px/1.2 var(--mono);letter-spacing:.06em;text-transform:uppercase;cursor:pointer;-webkit-user-select:none;user-select:none;touch-action:manipulation;background:0 0;border-radius:5px;justify-content:center;align-items:center;gap:6px;padding:6px 12px;display:inline-flex}.btn:hover:not(:disabled){border-color:var(--muted)}.btn:disabled{opacity:.38;cursor:default}.btn.primary{border-color:var(--work);background:var(--work);color:var(--bg)}.btn.primary:hover:not(:disabled){background:#ffc13d;border-color:#ffc13d}.btn.icon{letter-spacing:0;min-width:34px;padding:6px 9px;font-size:15px}.btn[aria-pressed=true]{border-color:var(--work);background:var(--work-bg);color:var(--work)}.seg{border:1px solid var(--line-2);border-radius:5px;display:inline-flex;overflow:hidden}.seg button{border:0;border-left:1px solid var(--line-2);min-height:32px;color:var(--muted);font:600 11px/1.2 var(--mono);letter-spacing:.05em;text-transform:uppercase;cursor:pointer;background:0 0;padding:5px 10px}.seg button:first-child{border-left:0}.seg button[aria-pressed=true]{background:var(--work-bg);color:var(--work)}.slider{color:var(--muted);font:500 11px/1.2 var(--mono);letter-spacing:.05em;text-transform:uppercase;align-items:center;gap:10px;display:inline-flex}.slider output{min-width:3ch;color:var(--ink)}input[type=range]{width:140px;height:28px;accent-color:var(--work);cursor:pointer;background:0 0;margin:0}.demo-stage{touch-action:pan-y;min-height:120px;position:relative}.demo-stage canvas{width:100%;height:100%;display:block}.demo-foot{border-top:1px solid var(--line);font-family:var(--mono);padding:10px 14px 12px}.demo-say{min-height:3.1em;color:var(--ink);font-size:12.5px;line-height:1.55}.demo-say .tag{color:var(--faint);letter-spacing:.08em;text-transform:uppercase;margin-right:8px}.demo-say[data-tone=work]{color:var(--work)}.demo-say[data-tone=ok]{color:var(--ok)}.demo-say[data-tone=danger]{color:var(--danger)}.demo-say[data-tone=purple]{color:var(--purple)}.demo-stats{color:var(--faint);letter-spacing:.04em;margin-top:4px;font-size:11px}.demo-stats b{color:var(--muted);font-weight:500}.demo-text{color:var(--faint);margin-top:8px;font-size:11px}.demo-text summary{cursor:pointer;letter-spacing:.04em;width:max-content}.demo-text pre{border:1px solid var(--line);background:var(--bg);max-height:160px;color:var(--muted);font:11.5px/1.5 var(--mono);white-space:pre-wrap;word-break:break-word;border-radius:5px;margin:8px 0 0;padding:10px;overflow:auto}.demo-failed{border:1px dashed var(--line-2);border-radius:8px;padding:14px}.demo-caption{color:var(--faint);margin:10px 2px 0;font-size:13px;line-height:1.5}.demo-hint{color:var(--faint);font:11px/1.3 var(--mono);pointer-events:none;position:absolute;bottom:10px;left:12px}.rule-card{border:1px solid var(--line-2);background:var(--bg);border-radius:6px;align-items:center;gap:10px;padding:8px 10px;display:flex}.rule-card svg{display:block}.rule-card .rule-arrow{color:var(--muted);font:18px var(--mono)}.rule-text{color:var(--muted);font:12px/1.4 var(--mono);overflow-wrap:anywhere}.read-end{max-width:var(--prose);border-top:1px solid var(--line-2);align-items:center;gap:16px;margin:56px auto 0;padding:32px 0;display:flex}.read-end button{border:1px solid var(--line-2);min-height:44px;color:var(--ink);font:500 15px/1.35 var(--sans);cursor:pointer;background:0 0;border-radius:6px}.read-prev{min-width:44px}.read-next-title{min-width:0;color:var(--muted);margin-right:auto;font-size:14px}.read-next{margin-left:auto;padding:12px 18px;border-color:var(--work)!important;background:var(--work)!important;color:var(--bg)!important}.read-next:hover{background:#ffc13d!important}.site-footer{border-top:1px solid var(--line);color:var(--faint);justify-content:space-between;align-items:center;gap:24px;margin-top:32px;padding:30px 32px 64px;font-size:13px;display:flex}.site-footer a{color:var(--muted)}@media (max-width:800px){.site-header{gap:14px;padding:0 20px}.brand-word,.brand-hand{display:none}.reader{padding-top:36px}}@media (max-width:600px){:root{--bar:56px}body{font-size:16px}.site-header{grid-template-columns:24px minmax(0,1fr) minmax(150px,48%);gap:10px;padding:0 14px}.site-title{text-align:left;font-size:12px}.chapter-picker{width:100%}.chapter-picker-number{font-size:10px;left:8px}.chapter-picker select{min-height:40px;padding:8px 22px 8px 30px;font-size:12px}h2{font-size:27px}.standfirst{font-size:18px}.read-next-title{display:none}.demo-bar{padding:8px}.btn{min-height:40px}.slider{flex:100%}.slider input[type=range]{flex:1;width:auto}.seg{border:0;flex-wrap:wrap;gap:4px;overflow:visible}.seg button{border:1px solid var(--line-2);border-radius:5px;min-height:38px}.seg button:first-child{border-left:1px solid var(--line-2)}.site-footer{flex-direction:column;align-items:flex-start;padding:24px 16px 48px}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}body.present .site-header,body.present .site-footer,body.present .read-end,body.present .chapter>.col,body.present .demo-caption,body.present .demo-stats,body.present .demo-text{display:none!important}body.present .reader{padding-top:24px}body.present .demo-slot{max-width:min(1500px,96vw);margin-block:0 48px}body.present .demo-say{font-size:16px}body.present .btn{min-height:42px;font-size:13px}body.present .demo-stage canvas{height:min(72vh,820px)!important}body.present .demo-stage .zoo-card canvas{height:200px!important}.demo-stage.split{grid-template-columns:220px minmax(0,1fr);display:grid}.demo-stage.split.split-right{grid-template-columns:minmax(0,1fr) 270px}.split-main{min-width:0;position:relative}.rel-input{border:1px solid var(--line-2);background:var(--bg);width:92px;min-height:34px;color:var(--ink);font:13px var(--mono);border-radius:5px;padding:6px 10px}.rel-list{border-right:1px solid var(--line);flex-direction:column;gap:4px;max-height:380px;padding:12px;display:flex;overflow:auto}.rel-row{border:1px solid #0000;border-radius:5px;justify-content:space-between;align-items:center;padding:4px 6px 4px 10px;display:flex}.rel-row code{color:var(--ink);font:13px var(--mono)}.rel-row.hover{background:var(--work-bg);border-color:#f3b01c99}.rel-row.hover code{color:var(--work)}.rel-remove{width:26px;height:26px;color:var(--faint);cursor:pointer;background:0 0;border:0;border-radius:4px;font-size:16px}.rel-remove:hover{color:var(--ink);background:var(--panel-2)}.rel-empty{color:var(--faint);font:12px var(--mono)}.side-table{border-left:1px solid var(--line);max-height:380px;padding:10px 8px;overflow:hidden auto}table.counts{border-collapse:collapse;width:100%;font:12px/1.4 var(--mono)}table.counts th{color:var(--faint);text-align:right;text-transform:uppercase;letter-spacing:.06em;padding:4px;font-size:10.5px;font-weight:500}table.counts td{border-top:1px solid var(--line);color:var(--muted);text-align:right;padding:4px}table.counts tr.fresh td{animation:1.6s ease-out fresh-row}@keyframes fresh-row{0%{background:var(--ok-bg);color:var(--ok)}}.demo-stage.triptych{grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.trip-card{border-left:1px solid var(--line);cursor:pointer;position:relative}.trip-card:first-child{border-left:0}.trip-card:hover{background:#edecec05}.trip-name{z-index:1;color:var(--muted);font:600 13px var(--mono);position:absolute;top:10px;left:12px}.trip-list{border-top:1px solid var(--line);flex-wrap:wrap;gap:4px 8px;padding:8px 12px 12px;display:flex}.trip-list code{color:var(--muted);font:12px var(--mono)}.trip-list code.diff{color:var(--work);text-underline-offset:3px;text-decoration:underline}.trip-card.odd .trip-name{color:var(--work)}.trip-card.right .trip-name:after{content:"  same";color:var(--ok)}.trip-card.odd .trip-name:after{content:"  different"}.ca-legend{flex-wrap:wrap;justify-content:center;gap:10px;padding:12px 12px 4px;display:flex}.ca-case{justify-items:center;gap:2px;display:grid}.ca-top,.ca-out{gap:1px;display:flex}.ca-case i{background:#e4e1d8;border:1px solid #b9b5aa;width:9px;height:9px}.ca-case i.on{background:#0d0c08;border-color:#0d0c08}.demo-strip .label{color:var(--faint);font:500 11px/1.2 var(--mono);letter-spacing:.08em;text-transform:uppercase}.demo-strip{border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:10px 18px;padding:10px 14px;display:flex}.demo-strip .rule-card{background:0 0;border:0;padding:0}.demo-strip .rule-text{max-width:300px;font-size:12.5px}.demo-strip .rule-card{flex-wrap:wrap;min-width:0}.rule-card svg{max-width:40vw;height:auto}@media (max-width:760px){.demo-stage.split,.demo-stage.split.split-right{grid-template-columns:1fr}.rel-list,.side-table{border:0;border-bottom:1px solid var(--line);max-height:150px}.split-right .side-table{border-top:1px solid var(--line);border-bottom:0;order:2}.demo-stage.triptych{grid-template-columns:1fr}.trip-card{border-left:0;border-top:1px solid var(--line)}}.dim-stage.split.split-right{grid-template-columns:minmax(0,1fr) 340px}.dim-side{border-left:1px solid var(--line);flex-direction:column;gap:8px;padding:12px 12px 14px;display:flex}.slope-chart{width:100%;height:auto}.dim-readout{color:var(--muted);font:12px/1.45 var(--mono);gap:4px;display:grid}.dim-readout b{color:var(--ink);font-weight:600}.dim-readout b.y{color:var(--work)}.dim-key{color:var(--faint);margin-top:4px;font-size:10.5px}@media (max-width:760px){.dim-stage.split.split-right{grid-template-columns:1fr}.dim-side{border-left:0;border-top:1px solid var(--line)}}.zoo-grid{background:var(--line);grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;display:grid}.zoo-card{background:var(--panel);min-width:0;color:var(--ink);text-align:left;cursor:pointer;border:0;flex-direction:column;gap:6px;padding:10px 10px 12px;display:flex}.zoo-card:hover{background:#201d16}.zoo-card{position:relative}.zoo-card canvas{width:100%;height:140px;display:block}.zoo-wait{color:var(--faint);font:11px var(--mono);text-align:center;pointer-events:none;position:absolute;top:70px;left:0;right:0}.zoo-rule{color:var(--muted);font:10.5px/1.4 var(--mono);overflow-wrap:anywhere}.zoo-sig{color:var(--faint);font:10.5px var(--mono);justify-content:space-between;align-items:center;gap:8px;display:flex}.zoo-chip:not(:empty){border:1px solid var(--line-2);color:var(--muted);text-transform:uppercase;letter-spacing:.06em;border-radius:4px;padding:1px 6px;font-size:9.5px}.zoo-card.seen .zoo-rule{color:var(--ink)}.zoo-title{border-bottom:1px solid var(--line);color:var(--muted);font:12px/1.4 var(--mono);flex-wrap:wrap;gap:6px;padding:10px 14px;display:flex}.zoo-title code{color:var(--ink)}@media (max-width:900px){.zoo-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (max-width:640px){.zoo-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.zoo-card canvas{height:110px}}.event-list{font:11.5px/1.4 var(--mono);color:var(--muted);flex-direction:column;gap:4px;display:flex}.event-head{color:var(--faint);letter-spacing:.08em;text-transform:uppercase;margin-bottom:4px;font-size:10.5px}.event-row{grid-template-columns:22px 1fr auto;align-items:center;gap:6px;display:grid}.event-dot{background:var(--purple);width:18px;height:18px;color:var(--bg);border-radius:50%;place-items:center;font-size:9.5px;font-weight:700;display:inline-grid}.event-cause{color:var(--purple)}.event-empty{color:var(--faint)}.demo-stage.twin{grid-template-columns:1fr 1fr;display:grid}.twin-pane{min-width:0;position:relative}.twin-pane+.twin-pane{border-left:1px solid var(--line)}.twin-label{z-index:1;color:var(--faint);font:500 10.5px var(--mono);letter-spacing:.08em;text-transform:uppercase;position:absolute;top:10px;left:12px}.causal-svg{width:100%;height:380px;display:block}.causal-svg .clink{stroke:var(--purple);stroke-opacity:.45;stroke-width:1.2px}.causal-svg .clink.big{stroke-opacity:.3;stroke-width:.8px}.causal-svg .clink.on{stroke-opacity:1;stroke-width:2px}.causal-svg .cev{fill:var(--purple);cursor:pointer}.causal-svg .cev.rel{stroke:var(--ink);stroke-width:1.2px}.causal-svg .cev.hl{fill:var(--work)}.causal-svg .axis,.causal-svg .empty{fill:var(--faint);font:10px var(--mono)}@media (max-width:760px){.demo-stage.twin{grid-template-columns:1fr}.twin-pane+.twin-pane{border-left:0;border-top:1px solid var(--line)}.causal-svg{height:300px}}.ledger-wrap{margin:8px 0 28px;overflow-x:auto}table.ledger{border-collapse:collapse;width:100%;font-size:15px;line-height:1.45}table.ledger th{border-bottom:1px solid var(--line-2);color:var(--faint);font:500 11px var(--mono);letter-spacing:.08em;text-align:left;text-transform:uppercase;padding:8px 10px}table.ledger td{border-bottom:1px solid var(--line);vertical-align:top;padding:10px}table.ledger td:nth-child(3){color:var(--muted)}ul.sources{padding-left:18px;font-size:15px}.pg-editor{border-bottom:1px solid var(--line);grid-template-columns:minmax(0,1fr) minmax(0,260px) auto;align-items:end;gap:10px 14px;padding:12px 14px;display:grid}.pg-field{color:var(--faint);font:500 10.5px var(--mono);letter-spacing:.08em;text-transform:uppercase;gap:4px;display:grid}.pg-rule,.pg-init,.pg-preset{border:1px solid var(--line-2);background:var(--bg);width:100%;min-height:36px;color:var(--ink);font:13px/1.4 var(--mono);letter-spacing:0;text-transform:none;resize:vertical;border-radius:5px;padding:7px 10px}.pg-actions{gap:8px;display:flex}.pg-preset{min-width:170px}.pg-error:not(:empty){color:var(--danger);font:12px var(--mono);grid-column:1/-1}.pg-card{grid-column:1/-1;align-items:center;gap:14px;display:flex}.pg-card .rule-card{background:0 0;border:0;padding:0}.pg-card .rule-text{display:none}.pg-sig{color:var(--faint);font:12px var(--mono)}.nav-link{color:var(--muted);font-size:14px;text-decoration:none}.small-print{color:var(--muted);font-size:15px}@media (max-width:760px){.pg-editor{grid-template-columns:1fr}}