:root{--bg:#F4F5F8;--paper:#FFFFFF;--ink:#0E1220;--ink2:#2E3548;--muted:#525B70;--navy:#121A2C;--violet:#433A78;
--violet2:#6A5FB0;--violet-wash:#EEECF7;--silver:#C9CED6;--line:#DCE0E7;--amber:#E1A43F;--amber-ink:#83550A;
--alert:#B42318;--plate:#0B0D14;--radius:4px;--max:1240px;
--f-head:'Barlow Condensed','Arial Narrow',Arial,sans-serif;--f-body:'IBM Plex Sans',system-ui,-apple-system,'Segoe UI',Arial,sans-serif;
--f-mono:'JetBrains Mono',ui-monospace,'Cascadia Mono',Consolas,monospace}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.62 var(--f-body);-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;height:auto}
a{color:var(--violet);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--navy)}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px;border-radius:2px}
.skip{position:absolute;left:-999px;top:8px;background:var(--navy);color:#fff;padding:10px 14px;z-index:50}
.skip:focus{left:8px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
h1,h2,h3,h4{font-family:var(--f-head);font-weight:700;letter-spacing:.01em;line-height:1.06;color:var(--navy);margin:0 0 .45em}
h1{font-size:clamp(2.4rem,5.4vw,4.6rem);text-transform:uppercase}
h2{font-size:clamp(1.9rem,3.6vw,2.9rem);text-transform:uppercase}
h3{font-size:1.45rem}
h4{font-size:1.15rem}
p{margin:0 0 1em}
.eyebrow{font:500 .74rem/1.4 var(--f-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--violet);margin:0 0 14px;display:block}
.lede{font-size:1.16rem;color:var(--ink2);max-width:62ch}
.muted{color:var(--muted)}
.mono{font-family:var(--f-mono);font-size:.86em}
/* header */
.site-head{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:saturate(1.2) blur(6px)}
.head-in{display:flex;align-items:center;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--navy);flex:0 0 auto}
.brand img.emblem{width:52px;height:36px;object-fit:contain}
.brand svg.wm{height:22px;width:auto;display:block}
.nav{display:flex;align-items:center;gap:0;margin-left:auto;flex-wrap:nowrap}
.nav a{font:600 .75rem/1 var(--f-body);letter-spacing:.04em;text-transform:uppercase;color:var(--ink2);text-decoration:none;padding:9px 8px;border-radius:2px;white-space:nowrap}
.nav a:hover,.nav a[aria-current=page]{color:var(--violet);background:var(--violet-wash)}
.btn{display:inline-flex;align-items:center;gap:10px;font:600 .82rem/1 var(--f-body);letter-spacing:.08em;text-transform:uppercase;
padding:14px 20px;border-radius:2px;text-decoration:none;border:1px solid var(--navy);transition:transform .18s ease,background-color .18s ease,color .18s ease;cursor:pointer}
.btn svg{width:16px;height:16px;transition:transform .2s ease}
.btn:hover svg{transform:translateX(3px)}
.btn-primary{background:var(--navy);color:#fff}
.btn-primary:hover{background:var(--violet);border-color:var(--violet);color:#fff}
.btn-ghost{background:transparent;color:var(--navy)}
.btn-ghost:hover{background:var(--navy);color:#fff}
.nav .btn{margin-left:8px;padding:11px 13px;color:#fff}
.nav .btn:hover{color:#fff}
.menu{display:none;margin-left:auto}
.menu summary{list-style:none;cursor:pointer;font:600 .8rem/1 var(--f-body);letter-spacing:.1em;text-transform:uppercase;padding:12px 14px;border:1px solid var(--silver);border-radius:2px}
.menu summary::-webkit-details-marker{display:none}
.menu[open] .menu-panel{display:block}
.menu-panel{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);padding:8px 24px 18px;box-shadow:0 12px 24px rgba(14,18,32,.08)}
.menu-panel a{display:block;padding:12px 0;border-bottom:1px solid var(--line);color:var(--navy);text-decoration:none;font-weight:600}
@media (max-width:1320px){.nav{display:none}.menu{display:block}.head-in{position:relative}}
/* sections */
section{padding:84px 0}
.band{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:820px;margin-bottom:38px}
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:980px){.g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:680px){.g2,.g3,.g4{grid-template-columns:minmax(0,1fr)}section{padding:60px 0}}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:26px;position:relative;transition:transform .2s ease,border-color .2s ease}
.band .card{background:var(--bg)}
a.card{display:block;text-decoration:none;color:inherit}
a.card:hover{transform:translateY(-3px);border-color:var(--violet2)}
.card h3{margin-top:4px}
.card p:last-child{margin-bottom:0}
.idx{font:500 .72rem/1 var(--f-mono);letter-spacing:.14em;color:var(--muted)}
.rule{height:2px;background:linear-gradient(90deg,var(--violet),var(--amber));width:56px;margin:16px 0}
/* status badges (brief 6.4) */
.status{display:inline-flex;align-items:center;gap:7px;font:500 .7rem/1 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;padding:6px 9px;border-radius:2px;border:1px solid currentColor;white-space:nowrap}
.status::before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor}
.s-prototype{color:#fff;background:var(--violet);border-color:var(--violet)}
.s-development{color:var(--amber-ink);background:#FFF7E8}
.s-research{color:var(--navy);background:#EEF1F6}
.s-planned{color:var(--muted);background:#F6F7F9}
.s-implemented{color:#fff;background:var(--navy);border-color:var(--navy)}
/* hero */
.hero{padding:40px 0 64px;background:linear-gradient(180deg,#fff 0%,var(--bg) 100%);border-bottom:1px solid var(--line)}
.hero h1{font-size:clamp(2.3rem,4.6vw,4.1rem)}
.hero-copy{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:start;margin-top:34px}
.plate.hero-plate img{height:clamp(220px,34vw,430px);object-fit:cover;object-position:50% 42%}
.hero .cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
@media (max-width:900px){.hero-copy{grid-template-columns:minmax(0,1fr);gap:8px;margin-top:26px}}
.plate{background:var(--plate);border-radius:6px;overflow:hidden;position:relative;box-shadow:0 24px 60px rgba(18,26,44,.22),0 0 0 1px rgba(201,206,214,.6)}
.plate img{display:block;width:100%;height:auto}
.plate::after{content:"";position:absolute;inset:0;pointer-events:none;box-shadow:inset 0 0 0 1px rgba(255,255,255,.06)}
.plate figcaption{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:11px 16px;background:var(--plate);font:500 .68rem/1.4 var(--f-mono);letter-spacing:.16em;color:#C9CED6;text-transform:uppercase;border-top:1px solid rgba(201,206,214,.14)}
.hero-plate img{transform-origin:50% 60%;animation:breathe 14s ease-in-out infinite alternate}
@keyframes breathe{from{transform:scale(1)}to{transform:scale(1.035)}}

.sov{background:var(--navy);color:#E6E9F0;padding:30px 0}
.sov .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px}
.sov strong{font:700 clamp(1.4rem,2.6vw,2rem)/1 var(--f-head);letter-spacing:.14em;color:#fff}
.sov span{font:500 .76rem/1.5 var(--f-mono);letter-spacing:.18em;color:#B9BFCC}
/* page hero */
.phero{padding:58px 0 40px;background:#fff;border-bottom:1px solid var(--line)}
.crumbs{font:500 .72rem/1.4 var(--f-mono);letter-spacing:.08em;margin-bottom:18px;color:var(--muted)}
.crumbs a{color:var(--muted)}
.phero-in{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:40px;align-items:center}
@media (max-width:900px){.phero-in{grid-template-columns:minmax(0,1fr)}}
/* lists and tables */
.ticks{list-style:none;padding:0;margin:0}
.ticks li{padding:10px 0 10px 28px;border-bottom:1px solid var(--line);position:relative}
.ticks li::before{content:"";position:absolute;left:2px;top:19px;width:12px;height:2px;background:var(--violet)}
.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;gap:14px}
.steps li{counter-increment:s;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px 18px 68px;position:relative}
.steps li::before{content:counter(s,decimal-leading-zero);position:absolute;left:20px;top:17px;font:600 1.05rem/1 var(--f-mono);color:var(--violet)}
.steps strong{display:block;font-family:var(--f-head);font-size:1.2rem;color:var(--navy);letter-spacing:.01em}
.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper)}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line);vertical-align:top}
th{font:600 .74rem/1.3 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);background:#FAFBFC}
tr:last-child td{border-bottom:0}
td.nil{font-weight:600;color:var(--navy)}
/* diagrams */
.diagram{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.diagram svg{display:block;width:100%;height:auto}
.diagram figcaption{font-size:.88rem;color:var(--muted);margin-top:10px}
.flow-dash{stroke-dasharray:6 6;animation:flow 1.8s linear infinite}
@keyframes flow{to{stroke-dashoffset:-24}}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
/* explorer / tools */
.tool{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.tool-head{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;margin-bottom:16px}
.toggles{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 18px;padding:0;border:0}
.toggles label{display:inline-flex;align-items:center;gap:9px;border:1px solid var(--silver);border-radius:2px;padding:10px 13px;font-size:.92rem;cursor:pointer;background:#fff}
.toggles input{accent-color:var(--violet);width:18px;height:18px}
.path{transition:stroke .2s ease,opacity .2s ease}
.path.off{opacity:.18}
.path.on{stroke:var(--violet)}
.demo-flag{display:inline-block;font:600 .7rem/1 var(--f-mono);letter-spacing:.14em;text-transform:uppercase;color:#fff;background:var(--alert);padding:7px 10px;border-radius:2px}
form.plan{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 20px}
@media (max-width:680px){form.plan{grid-template-columns:minmax(0,1fr)}}
.field label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px;color:var(--navy)}
.field .hint{font-size:.82rem;color:var(--muted);margin-top:4px}
.field input,.field select{width:100%;font:inherit;padding:11px 12px;border:1px solid var(--silver);border-radius:2px;background:#fff;color:var(--ink)}
.field input:focus,.field select:focus{border-color:var(--violet)}
.out{margin-top:22px;border-top:2px solid var(--navy);padding-top:18px}
.out h3{margin-bottom:8px}
.case{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,2fr);gap:20px}
@media (max-width:900px){.case{grid-template-columns:minmax(0,1fr)}}
.case svg .node{cursor:pointer}
.case svg .node circle{transition:transform .18s ease}
.case svg .node:focus circle,.case svg .node:hover circle{stroke:var(--amber);stroke-width:3}
.inspect{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:18px;min-height:180px}
.grade{font:600 .7rem/1 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;padding:5px 8px;border-radius:2px}
.grade.confirmed{background:var(--navy);color:#fff}
.grade.supported{background:#FFF7E8;color:var(--amber-ink);border:1px solid currentColor}
.grade.unverified{background:#F6F7F9;color:var(--muted);border:1px solid currentColor}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}
.actions button{font:600 .82rem/1 var(--f-body);padding:11px 14px;border:1px solid var(--navy);background:#fff;color:var(--navy);border-radius:2px;cursor:pointer}
.actions button[aria-pressed=true]{background:var(--navy);color:#fff}
.timeline{list-style:none;margin:0;padding:0;border-left:2px solid var(--silver)}
.timeline li{padding:6px 0 10px 18px;position:relative;font-size:.93rem}
.timeline li::before{content:"";position:absolute;left:-6px;top:12px;width:10px;height:10px;border-radius:50%;background:var(--violet)}
.cov td,.cov th{text-align:center;white-space:nowrap}
.cov td:first-child,.cov th:first-child{text-align:left;white-space:normal;min-width:220px}
.cov button{border:0;background:none;cursor:pointer;padding:6px;font:600 .8rem/1 var(--f-mono)}
.c-full{color:#fff!important;background:var(--violet)!important;border-radius:2px}
.c-partial{color:var(--amber-ink)!important;background:#FFF7E8!important;border-radius:2px}
.c-none{color:var(--muted)!important}
.filterbar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.filterbar button{font:500 .74rem/1 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;padding:9px 11px;border:1px solid var(--silver);background:#fff;border-radius:2px;cursor:pointer;color:var(--ink2)}
.filterbar button[aria-pressed=true]{border-color:var(--violet);background:var(--violet-wash);color:var(--violet)}
.search{display:flex;gap:10px}
.search input{flex:1;font:inherit;padding:12px 14px;border:1px solid var(--silver);border-radius:2px}
.results{list-style:none;padding:0;margin:14px 0 0}
.results li{padding:12px 0;border-bottom:1px solid var(--line)}
.results a{font-weight:600}
.cta-band{background:var(--navy);color:#DDE2EC}
.cta-band h2{color:#fff}
.cta-band .lede{color:#C4CAD6}
.cta-band .btn-primary{background:#fff;color:var(--navy);border-color:#fff}
.cta-band .btn-primary:hover{background:var(--amber);border-color:var(--amber);color:var(--navy)}
.cta-band .btn-ghost{color:#fff;border-color:#8890A3}
.cta-band .btn-ghost:hover{background:#fff;color:var(--navy)}
.note{border-left:3px solid var(--violet);background:var(--violet-wash);padding:16px 18px;border-radius:0 var(--radius) var(--radius) 0}
.faq details{border-bottom:1px solid var(--line);padding:6px 0}
.faq summary{cursor:pointer;font-weight:600;color:var(--navy);padding:12px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"+";display:inline-block;width:22px;color:var(--violet);font-family:var(--f-mono)}
.faq details[open] summary::before{content:"\2212"}
dl.gl{display:grid;grid-template-columns:minmax(0,1fr);gap:0}
dl.gl dt{font-family:var(--f-head);font-weight:700;font-size:1.2rem;color:var(--navy);padding-top:16px}
dl.gl dd{margin:4px 0 0;padding-bottom:16px;border-bottom:1px solid var(--line)}
/* footer */
.site-foot{background:#fff;border-top:1px solid var(--line);padding:54px 0 30px;font-size:.92rem}
.foot-grid{display:grid;grid-template-columns:minmax(0,2fr) repeat(3,minmax(0,1fr));gap:28px}
@media (max-width:860px){.foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.foot-grid{grid-template-columns:minmax(0,1fr)}}
.site-foot h4{font:600 .74rem/1.3 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}
.site-foot ul{list-style:none;margin:0;padding:0}
.site-foot li{padding:4px 0}
.site-foot a{color:var(--ink2);text-decoration:none}
.site-foot a:hover{color:var(--violet);text-decoration:underline}
.foot-name{font:600 .74rem/1.5 var(--f-mono);letter-spacing:.16em;color:var(--navy);margin:12px 0 4px}
.foot-base{margin-top:36px;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;color:var(--muted);font-size:.84rem}
/* motion: reveal by movement only (rule 83) */
.js .rv{transform:translateY(18px);transition:transform .7s cubic-bezier(.2,.7,.2,1)}
.js .rv.in{transform:none}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.js .rv{transform:none}}
@media print{.site-head,.site-foot,.cta-band,.hero-plate,.no-print{display:none!important}body{background:#fff}.tool{border:0;padding:0}}