:root{--ink:#172033;--muted:#647087;--line:#dfe4ec;--soft:#f5f7fa;--nav:#111827;--blue:#3867ed;--purple:#7656d8;--green:#168467;--sidebar:272px;--top:64px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{margin:0;color:var(--ink);font:15px/1.65 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;background:#fff}
.skip-link{position:fixed;left:1rem;top:-4rem;z-index:100;background:#fff;padding:.7rem 1rem}
.skip-link:focus{top:.5rem}
a{color:inherit}

/* Top bar */
.topbar{height:var(--top);position:fixed;inset:0 0 auto;z-index:20;background:rgba(17,24,39,.98);color:#fff;display:flex;align-items:center;padding:0 24px;border-bottom:1px solid #293247}
.brand{width:calc(var(--sidebar) - 24px);display:flex;gap:11px;align-items:center;text-decoration:none;font-size:16px;cursor:pointer;background:none;border:0;color:#fff;font-family:inherit}
.brand b{font-weight:500;color:#aeb9cf}
.brand-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,#5b7cfa,#7656d8);font-size:11px;font-weight:800}
.search-wrap{position:relative;width:min(480px,42vw);height:38px;background:#222c3f;border:1px solid #354057;border-radius:7px;display:flex;align-items:center;padding:0 10px;gap:8px}
.search-wrap input{width:100%;border:0;outline:0;background:transparent;color:#fff;font:inherit}
.search-wrap input::placeholder{color:#9aa6ba}
.search-wrap kbd{border:1px solid #4e5a70;border-radius:4px;padding:0 6px;color:#aeb9cf}
.search-results{position:absolute;top:44px;left:0;right:0;background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:0 14px 40px #0c142330;border-radius:8px;overflow:hidden;max-height:70vh;overflow-y:auto}
.search-results a{display:block;padding:10px 14px;text-decoration:none;border-bottom:1px solid var(--line)}
.search-results a:last-child{border-bottom:0}
.search-results a:hover{background:var(--soft)}
.search-results small{display:block;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.search-results .result-topic{display:block;font-size:10px;text-transform:uppercase;letter-spacing:.06em;color:var(--blue);margin-bottom:2px}
.search-results p{padding:8px 14px;margin:0;color:var(--muted);font-size:13px}
.version{margin-left:auto;font-size:11px;letter-spacing:.08em;color:#9eabc0}
.menu-button{display:none}

/* Sidebar */
.sidebar{position:fixed;z-index:15;top:var(--top);bottom:0;left:0;width:var(--sidebar);background:#fafbfc;border-right:1px solid var(--line);padding:25px 18px;overflow:auto}
.nav-label,.toc p{font-size:10px;font-weight:800;letter-spacing:.12em;color:#9aa3b2;margin:0 10px 10px}
.sidebar a,.sidebar summary{display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:6px;text-decoration:none;color:#515d71;font-size:13px;cursor:pointer}
.sidebar a{padding-left:25px;justify-content:space-between}
.sidebar>nav>a{padding-left:10px}
.sidebar a:hover,.sidebar a.active{background:#eaf0ff;color:#3159c8}
.sidebar a.active{font-weight:700}
.sidebar summary{font-weight:700;color:#303a4d;list-style:none}
.sidebar summary::-webkit-details-marker{display:none}
.sidebar summary:before{content:'›';display:inline-block;width:15px;transition:.15s}
.sidebar details[open] summary:before{transform:rotate(90deg)}
.nav-badge{flex-shrink:0;font-size:8px;text-transform:uppercase;letter-spacing:.06em;color:#8b96a8;background:#edf1f7;padding:3px 6px;border-radius:99px;font-weight:700}
.sidebar a.active .nav-badge{color:var(--blue);background:#dfe8ff}
.sidebar-foot{position:sticky;top:100%;border-top:1px solid var(--line);padding:16px 8px 0;font-size:12px;color:#596579;background:#fafbfc}
.sidebar-foot small{color:#929cab}
.dot{display:inline-block;width:7px;height:7px;background:#2daf81;border-radius:50%;margin-right:6px}
.scrim{display:none}

/* Main / page layout */
main{margin-left:var(--sidebar);padding-top:var(--top);display:grid;grid-template-columns:minmax(0,850px) 170px;gap:60px;max-width:1300px}
article{padding:0 56px 30px}
.article-page{padding-top:74px;padding-bottom:20px}
.article-page.hero{padding-top:86px;padding-bottom:20px;min-height:580px}

.eyebrow,.section-kicker{font-size:11px;letter-spacing:.16em;font-weight:800;color:var(--blue);margin-bottom:14px}
.hero h1{font-size:52px;line-height:1.08;letter-spacing:-.04em;margin:0 0 24px;max-width:700px}
.lead{font-size:19px;line-height:1.65;color:#536078;max-width:700px}
.page-title{font-size:34px;line-height:1.2;letter-spacing:-.025em;margin:0 0 18px}
.article-page h2{font-size:22px;margin:34px 0 8px;letter-spacing:-.01em}
.article-page h2:first-child{margin-top:0}
.article-page h3{margin:18px 0 8px;font-size:16px}
p{max-width:760px;color:#4f5c70}
.hero-actions{display:flex;gap:10px;margin:30px 0}
.button{padding:11px 16px;border-radius:7px;font-weight:700;text-decoration:none;font-size:14px;display:inline-block;cursor:pointer;border:0;font-family:inherit}
.primary{background:var(--blue);color:#fff}
.secondary{border:1px solid var(--line);background:#fff;color:var(--ink)}
.notice,.callout{border:1px solid #d7e1fd;border-left:4px solid var(--blue);border-radius:7px;background:#f4f7ff;padding:15px 18px;margin:28px 0;color:#3e4b61}
.notice p,.callout p{margin:4px 0}
.card-grid{display:grid;gap:14px;margin:28px 0}
.card-grid.three{grid-template-columns:repeat(3,1fr)}
.card-grid.two{grid-template-columns:repeat(2,1fr)}
.feature-card{padding:21px;border:1px solid var(--line);border-radius:9px;box-shadow:0 2px 8px #18253c08}
.feature-card p{font-size:13px;margin:0}
.card-icon{display:grid;place-items:center;width:32px;height:32px;border-radius:8px;font-size:10px;font-weight:800}
.blue{background:#eaf0ff;color:var(--blue)}
.purple{background:#f0ebff;color:var(--purple)}
.green{background:#e4f7f1;color:var(--green)}
.flow{display:flex;align-items:center;gap:8px;margin:30px 0;overflow-x:auto;padding:8px 2px 16px}
.flow div{min-width:106px;border:1px solid var(--line);border-radius:8px;padding:12px;background:#fff}
.flow i{display:block;font-style:normal;font-size:10px;color:var(--blue)}
.flow b,.flow small{display:block}
.flow small{font-size:11px;color:var(--muted)}
.flow em{font-style:normal;color:#9aa3b2}
.warning{border-color:#f0dba8;border-left-color:#dda328;background:#fffaf0}
.danger{border-color:#efd1d1;border-left-color:#d55555;background:#fff7f7}
table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14px}
th,td{text-align:left;padding:12px;border-bottom:1px solid var(--line)}
th{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:#788398}
.relationship-map{border:1px solid var(--line);border-radius:10px;padding:30px 20px;margin-top:28px;background:radial-gradient(circle at 50% 0,#f3f6ff,transparent 60%)}
.map-row{display:flex;align-items:center;justify-content:center;gap:10px}
.entity{border:1px solid #bdc8d8;border-radius:8px;background:#fff;padding:12px 18px;font-weight:800;box-shadow:0 4px 12px #26324a0d}
.entity small{display:block;font-weight:400;color:var(--muted)}
.entity.accent{border-top:3px solid var(--purple)}
.entity.accent2{border-top:3px solid var(--blue)}
.map-row>span{font-size:10px;color:#8b96a8}
.map-branches{display:grid;grid-template-columns:1fr 1.4fr 1fr;gap:12px;margin-top:28px}
.map-branches div{border-top:1px dashed #aab5c6;padding-top:14px;text-align:center}
.map-branches span,.map-branches b{display:block}
.map-branches span{display:inline-block;background:#edf1f7;border-radius:5px;padding:5px 8px;font-size:12px}
.map-branches b{font-size:10px;color:var(--muted);font-weight:400;margin:5px}
.caption{font-size:11px;color:#8791a2}
.entity-browser{display:grid;grid-template-columns:190px 1fr;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin-top:26px;min-height:345px}
.entity-tabs{background:var(--soft);padding:10px}
.entity-tabs button{display:block;width:100%;border:0;background:transparent;text-align:left;padding:8px 10px;border-radius:5px;color:#546075;cursor:pointer;font:inherit}
.entity-tabs button[aria-selected=true]{background:#fff;color:var(--blue);font-weight:700;box-shadow:0 1px 4px #16233b12}
.entity-detail{padding:34px;display:grid;grid-template-columns:1.3fr 1fr;gap:38px}
.entity-detail h3{font-size:30px;margin:12px 0}
.entity-detail p{font-size:15px}
.entity-detail code{display:inline-block;background:#172033;color:#cdd8ee;border-radius:5px;padding:6px 9px}
.entity-detail h4{font-size:12px;text-transform:uppercase;color:#7a8598;margin:0}
.entity-detail li{margin:9px 0;color:#536078}
.pill{font-size:10px;color:var(--blue);background:#eef3ff;padding:5px 8px;border-radius:99px;text-transform:uppercase;font-weight:800;letter-spacing:.08em}
.status-lanes{border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:26px 0}
.status-lanes>div{display:grid;grid-template-columns:100px 1fr;align-items:center;padding:12px 18px;border-bottom:1px solid var(--line)}
.status-lanes>div:last-child{border:0}
.status-lanes h3{font-size:13px;margin:0}
.status-lanes p{display:flex;align-items:center;gap:8px;margin:0;max-width:none}
.status-lanes span{background:#edf2f8;border-radius:99px;padding:4px 9px;font-size:11px}
.status-lanes i{font-style:normal;color:#9aa3b2}
.checks{list-style:none;padding:0}
.checks li{margin:8px 0;padding-left:24px}
.checks li:before{content:'✓';color:var(--green);font-weight:900;margin-left:-24px;margin-right:10px}
.routing-diagram{display:grid;grid-template-columns:1fr auto 1fr 72px 1.1fr auto 1fr;align-items:center;gap:10px;margin:30px -10px;padding:28px 12px;background:#f7f9fc;border:1px solid var(--line);border-radius:10px}
.route-node{background:#fff;border:1px solid #cfd7e3;border-radius:8px;padding:14px;min-height:120px}
.route-node small,.route-node b,.route-node span{display:block}
.route-node small{font-size:9px;color:var(--blue);font-weight:800;letter-spacing:.1em}
.route-node b{margin:8px 0}
.route-node span{font-size:11px;color:var(--muted)}
.rules-node{border-color:#9eb3f4}
.endpoint-node{border-color:#80c7b2}
.exception{border-color:#e7b4b4}
.route-arrow{color:#77849a}
.route-split{font-size:9px;color:#718097}
.route-split span{display:block;margin:18px 0}
.route-outcomes{display:grid;gap:8px}
.route-outcomes .route-node{min-height:auto}
.definitions{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}
.definitions div{border-top:1px solid var(--line);padding:15px 0}
.definitions dt{font-weight:800}
.definitions dd{margin:2px 0;color:var(--muted);font-size:13px}
.roadmap{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:24px 0}
.roadmap span{border:1px solid var(--line);padding:17px;border-radius:8px;display:block}
.roadmap b{display:block;font-size:10px;text-transform:uppercase;color:var(--blue)}
footer{display:flex;justify-content:space-between;padding:30px 0;color:#8b95a6;font-size:12px}

/* On-this-page rail (built dynamically per page) */
.toc{position:sticky;top:100px;align-self:start;padding-top:76px}
.toc a{display:block;text-decoration:none;color:#778296;font-size:12px;padding:4px 10px;border-left:1px solid var(--line);cursor:pointer;background:none;width:100%;text-align:left;font:inherit}
.toc a:hover{color:var(--blue)}

@media(max-width:1050px){
  main{grid-template-columns:minmax(0,1fr)}
  .toc{display:none}
  .routing-diagram{grid-template-columns:1fr;max-width:500px;margin:25px auto}
  .route-arrow{transform:rotate(90deg);text-align:center}
  .route-split{display:none}
}
@media(max-width:760px){
  :root{--top:58px}
  .topbar{padding:0 12px}
  .brand{width:auto}
  .brand span:last-child{display:none}
  .menu-button{display:block;color:#fff;background:none;border:0;font-size:20px;margin-right:6px}
  .search-wrap{width:auto;flex:1;margin:0 12px}
  .search-wrap kbd,.version{display:none}
  .sidebar{transform:translateX(-100%);transition:.2s}
  .nav-open .sidebar{transform:none}
  .nav-open .scrim{display:block;position:fixed;inset:var(--top) 0 0;z-index:14;background:#08101f80}
  main{margin-left:0}
  article{padding:0 22px}
  .article-page{padding-top:58px}
  .article-page.hero{padding-top:60px;min-height:auto}
  .hero h1{font-size:38px}
  .lead{font-size:17px}
  .card-grid.three,.card-grid.two,.roadmap{grid-template-columns:1fr}
  .flow{align-items:stretch}
  .map-row{flex-direction:column}
  .map-row>span{transform:rotate(90deg)}
  .map-branches{grid-template-columns:1fr}
  .entity-browser{grid-template-columns:1fr}
  .entity-tabs{display:flex;overflow-x:auto}
  .entity-tabs button{width:auto;white-space:nowrap}
  .entity-detail{grid-template-columns:1fr;padding:24px}
  .status-lanes>div{grid-template-columns:1fr}
  .status-lanes p{overflow-x:auto;padding-bottom:5px}
  .definitions{grid-template-columns:1fr}
  .hero-actions{flex-direction:column;align-items:flex-start}
}
@media print{
  .topbar,.sidebar,.toc,.hero-actions,.scrim{display:none}
  main{margin:0;padding:0;display:block}
  article{padding:20px}
  .article-page{padding-top:0}
  .relationship-map,.entity-browser,.routing-diagram{break-inside:avoid}
}

.page-body details{border:1px solid var(--line);border-radius:8px;margin:0 0 10px;background:#fff}
.page-body summary{cursor:pointer;padding:14px 18px;font-weight:700;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;color:var(--ink)}
.page-body summary::-webkit-details-marker{display:none}
.page-body summary:after{content:'+';color:var(--blue);font-size:18px;flex-shrink:0}
.page-body details[open] summary:after{content:'\2212'}
.page-body details>div{padding:0 18px 16px;color:var(--muted)}