@font-face{font-family:Archivo;font-style:normal;font-weight:500 900;font-stretch:62% 125%;font-display:swap;src:url(/nexus/fonts/archivo-500-900-latin.v25.woff2) format('woff2')}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:400;font-display:swap;src:url(/nexus/fonts/ibm-plex-sans-400-latin.v23.woff2) format('woff2')}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:600;font-display:swap;src:url(/nexus/fonts/ibm-plex-sans-600-latin.v23.woff2) format('woff2')}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url(/nexus/fonts/ibm-plex-mono-400-latin.v20.woff2) format('woff2')}
:root{color-scheme:light;--ground:#EDF0F3;--surface:#F9FAFB;--ink:#141C28;--muted:#4A5566;--rule:#CCD4DF;--accent:#8A4B04;--wash:#F7E9D6;--teal:#17564F;--teal-wash:#DDEFEC;--display:Archivo,system-ui,sans-serif;--body:'IBM Plex Sans',system-ui,sans-serif;--mono:'IBM Plex Mono',ui-monospace,monospace}
@media(prefers-color-scheme:dark){:root{color-scheme:dark;--ground:#0E141C;--surface:#141C27;--ink:#E4E9EF;--muted:#A3ADBA;--rule:#304055;--accent:#F4B360;--wash:#2A2217;--teal:#7ED3C6;--teal-wash:#14302C}}
*{box-sizing:border-box}
html{scroll-padding-top:170px}
body{margin:0;background:var(--ground);color:var(--ink);font:16px/1.6 var(--body);-webkit-font-smoothing:antialiased}
a{color:var(--accent)}a:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
h1,h2,h3,h4,p,figure{margin:0}h1,h2,h3,h4{text-wrap:balance}
h1{font:850 clamp(38px,6.5vw,76px)/1.05 var(--display);font-stretch:115%;letter-spacing:-.025em}
h2{font:760 clamp(26px,3vw,34px)/1.2 var(--display);font-stretch:110%}
h3{font:720 21px/1.25 var(--display)}h4{font:720 22px/1.3 var(--display)}
[hidden]{display:none!important}
.wrap,.ld-foot{width:min(1080px,calc(100% - 40px));margin-inline:auto}
.wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:52px;padding-block:48px}
.head,section{display:grid;gap:20px;min-width:0}.head{gap:18px}
.lede{max-width:73ch;font-size:18px;color:var(--muted)}.sub{max-width:83ch;color:var(--muted)}
.eyebrow,.label{font:400 11px/1.5 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.measurement,.proof{font-size:12px;color:var(--muted)}
.principles{display:flex;flex-wrap:wrap;gap:8px}.principles span{font:400 12px/1.5 var(--mono);padding:7px 10px;border:1px solid var(--rule);border-radius:5px;color:var(--muted)}
.page-contents{display:flex;flex-wrap:wrap;gap:10px 24px;border-block:1px solid var(--rule);padding-block:20px}.page-contents a{font:400 12px/1.5 var(--mono);text-decoration:none}.page-contents a:hover{text-decoration:underline}
.cards{display:grid;gap:16px}.three{grid-template-columns:repeat(3,minmax(0,1fr))}.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.card{padding:22px;border:1px solid var(--rule);border-radius:8px;background:var(--surface);display:grid;gap:12px;align-content:start}.card p{font-size:15px;color:var(--muted)}.card .proof{font-size:12px}
.boundary-map{border:1px solid var(--rule);border-radius:10px;padding:24px;background:var(--surface);display:grid;gap:20px}
.boundary-map figcaption{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;font-size:12px;color:var(--muted)}
.boundary-path{display:grid;grid-template-columns:1fr 80px 1.2fr 80px 1.2fr;align-items:stretch}
.zone{padding:18px;border:1px solid var(--rule);border-radius:6px;display:grid;align-content:start;gap:8px;background:var(--ground);min-width:0}.zone h3{font-size:19px}.zone p{font-size:13px;color:var(--muted)}
.zone.edge{border-color:var(--accent);background:var(--wash)}.zone.core{border-color:var(--teal);background:var(--teal-wash)}
.gate{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:8px;padding:8px;text-align:center;font:400 10px/1.5 var(--mono);color:var(--muted)}.gate b{font:28px/1 var(--body);color:var(--accent)}
.admin-path{border-top:1px dashed var(--rule);padding-top:18px;display:grid;grid-template-columns:140px 1fr;gap:16px}.admin-path p{font-size:13px;color:var(--muted)}
.delivery-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;list-style:none;margin:0;padding:0}.delivery-flow li{display:grid;gap:12px;align-content:start;border-top:2px solid var(--teal);padding:18px 8px 0 0}.delivery-flow h3{font-size:19px}.delivery-flow p{font-size:14px;color:var(--muted)}.step{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--teal-wash);color:var(--teal);font:400 12px var(--mono)}
.scope-note{border-left:3px solid var(--accent);background:var(--wash);padding:20px 24px;border-radius:0 8px 8px 0;display:grid;gap:10px}.scope-note h3{font-size:19px}.scope-note p{font-size:14px;max-width:94ch}
.evidence{display:grid;gap:14px;border-top:1px solid var(--rule);padding-top:24px}.evidence h2{font-size:21px}.evidence p{font-size:12px;color:var(--muted);max-width:110ch}
.related{display:flex;flex-wrap:wrap;gap:8px 24px;font-size:14px}.ld-foot{padding-block:0 32px;color:var(--muted);font:400 12px/1.6 var(--mono)}.ld-foot-in{border-top:1px solid var(--rule);padding-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}.skip{position:absolute;left:16px;top:8px;transform:translateY(-200%);z-index:20;background:var(--surface);padding:10px}.skip:focus{transform:none;position:fixed}
/* The same two-row site navigation as the other standalone Nexus deep dives. */
.ld-bar{position:sticky;top:0;z-index:10;padding:12px clamp(16px,4vw,40px) 10px;background:rgba(11,22,34,.96);color:#E8EDF2;border-bottom:1px solid #1E2A3A}
.ld-bar-in{max-width:1160px;margin:0 auto;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 24px}
.ld-brand{display:flex;flex-direction:column;gap:3px;text-decoration:none;white-space:nowrap}.ld-brand b{font:700 12.5px/1.2 var(--body);letter-spacing:.18em;text-transform:uppercase;color:#fff}.ld-brand span{font:400 14px/1.3 var(--body);color:rgba(232,237,242,.72)}
.ld-main{display:flex;flex-wrap:wrap;align-items:center;gap:6px 22px}.ld-main a{font:500 15px/1.4 var(--body);color:rgba(232,237,242,.76);text-decoration:none;white-space:nowrap}.ld-main a:hover{color:#fff}.ld-main a[aria-current]{color:#F2A43B}
.ld-sub{margin-top:10px;padding-top:8px;border-top:1px solid rgba(232,237,242,.08)}.ld-nav{display:flex;flex-wrap:wrap;gap:4px 18px}.ld-nav a{font:400 13px/1.5 var(--body);color:rgba(232,237,242,.76);text-decoration:none;white-space:nowrap}.ld-nav a:hover{color:#fff}.ld-nav a[aria-current=page]{color:#F2A43B}.ld-nav .ld-sep{flex:none;width:1px;align-self:stretch;background:rgba(232,237,242,.2)}.ld-bar a:focus-visible{outline-color:#F2A43B;outline-offset:2px}

button,summary{font:inherit}summary{cursor:pointer}code{font:400 .88em/1.6 var(--mono);overflow-wrap:anywhere}
img{max-width:100%;height:auto}figcaption{font-size:12px;color:var(--muted)}
.map{display:grid;gap:22px;padding:24px;border:1px solid var(--rule);border-radius:10px;background:var(--surface)}.map figcaption{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.book-chain{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:0;padding:0;list-style:none;counter-reset:book}.book-chain li{counter-increment:book;border:1px solid var(--rule);border-top:3px solid var(--teal);border-radius:5px;padding:16px;display:grid;gap:8px}.book-chain li:before{content:counter(book,decimal-leading-zero) " →";color:var(--teal);font:400 12px var(--mono)}.book-chain b{font-size:16px}.book-chain span{font-size:13px;color:var(--muted)}
.equation{background:var(--teal-wash);border-left:3px solid var(--teal);padding:22px;display:grid;gap:12px}.equation p{font:600 20px/1.6 var(--body)}.equation p span{font-weight:400;font-size:17px}
.explorer{border:1px solid var(--teal);border-radius:10px;padding:24px;background:var(--surface);display:grid;gap:20px}.explorer fieldset{border:0;padding:0;margin:0;min-width:0}.explorer legend{margin-bottom:12px;font-size:14px}.choices{display:flex;flex-wrap:wrap;gap:10px}.choices label{display:flex;align-items:center;gap:8px;padding:10px 12px;border:1px solid var(--rule);border-radius:5px;font-size:14px;cursor:pointer}.choices label:has(input:checked){background:var(--teal-wash);border-color:var(--teal);color:var(--teal)}.choices input{accent-color:var(--teal);margin:0}.explorer-panel{display:grid;gap:14px;border-top:1px solid var(--rule);padding-top:20px}.explorer-panel h3{color:var(--teal)}.explorer-panel p{max-width:95ch;font-size:15px}
.console-shot{display:grid;gap:12px}.console-shot img{display:block;width:100%;border:1px solid var(--rule);border-radius:8px}.console-shot a:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
.table-wrap{overflow-x:auto;border:1px solid var(--rule);border-radius:8px;background:var(--surface)}table{width:100%;border-collapse:collapse;font-size:14px}caption{text-align:left;font-size:12px;color:var(--muted);padding:18px 20px}th,td{padding:18px 20px;text-align:left;vertical-align:top;border-top:1px solid var(--rule)}thead th{font:400 11px/1.5 var(--mono);letter-spacing:.06em;text-transform:uppercase}tbody th{width:23%;font-weight:600}td{color:var(--muted);width:38.5%}.table-wrap:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.milestones{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}.milestones article{display:grid;gap:12px;align-content:start;border-top:3px solid var(--teal);padding-top:18px}.milestones h3{font-size:19px}.milestones p{font-size:14px;color:var(--muted)}
/* Built / proposed chips: proposed is dashed, as in the gallery pictures that label it. */
.status{display:inline-block;font:400 10px/1.4 var(--mono);letter-spacing:.06em;text-transform:uppercase;padding:2px 7px;border:1px solid var(--teal);border-radius:4px;color:var(--teal);white-space:nowrap;vertical-align:1px}.status.proposed{border-color:var(--accent);border-style:dashed;color:var(--accent)}td .status{margin-right:6px}
.card>header,.explorer-panel>header{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px}
.card .control{font-size:14px;border-top:1px solid var(--rule);padding-top:12px}.card .control b{color:var(--ink);font-weight:600}
@media(max-width:1000px){.milestones{grid-template-columns:repeat(3,minmax(0,1fr))}.boundary-path{grid-template-columns:1fr 48px 1fr 48px 1fr}.zone{padding:12px}}
@media(max-width:900px){.delivery-flow{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.cards,.book-chain,.boundary-path{grid-template-columns:minmax(0,1fr)}.wrap{gap:38px;padding-top:32px}.gate{flex-direction:row;padding:12px}.gate b{transform:rotate(90deg)}.zone{padding:18px}.ld-nav{min-width:0;flex-wrap:nowrap;overflow-x:auto;padding-right:24px;scrollbar-width:none}.ld-nav::-webkit-scrollbar{display:none}.milestones{grid-template-columns:repeat(2,minmax(0,1fr))}th,td{padding:14px}table{min-width:610px}}
@media(max-width:720px){.ld-bar-in{flex-direction:column;flex-wrap:nowrap;align-items:stretch;gap:6px}.ld-main{min-width:0;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;padding-right:48px;mask-image:linear-gradient(to right,#000 88%,transparent)}.ld-main::-webkit-scrollbar{display:none}}
@media(max-width:440px){h1{font-size:clamp(30px,9vw,39px)}.wrap,.ld-foot{width:calc(100% - 32px)}.card,.explorer,.map{padding:18px}.delivery-flow,.milestones{grid-template-columns:minmax(0,1fr)}.scope-note{padding:18px}.choices label{width:100%}}
@media print{.ld-bar,.page-contents,.choices,.skip{display:none!important}.explorer-panel[hidden]{display:grid!important}.wrap{width:100%;padding:0;gap:24px}.table-wrap{overflow:visible}table{min-width:0}.card,.map,.explorer{break-inside:avoid}}