:root{
  --bg:#f7f8fc; --bg2:#eef1f8; --card:#ffffff; --ink:#1a2035; --ink-soft:#5b6480; --line:#eef0f6; --line-strong:#a7aecb;
  --gray-soft:#f4f5f9;
  --shadow: 0 1px 2px rgba(20,25,50,.03), 0 14px 36px -18px rgba(20,25,50,.14);

  --e-bg:#f5f3ee; --e-line:#a19f96; --e-ink:#57554f;
  --p-bg:#eef4fc; --p-line:#3f7fc1; --p-title:#0c447c; --p-sub:#4d84bd;
  --n-bg:#f5f1fc; --n-line:#8367ba; --n-title:#4a2a92; --n-sub:#7860ab;
  --d-bg:#fdf3e3; --d-line:#c08a2e; --d-ink:#6b4a12;
  --g-bg:#eef9f3; --g-line:#3c9a6c; --g-ink:#186641;
  --r-bg:#fdeeef; --r-line:#c2585d; --r-ink:#96272c;
  --opt-bg: rgba(20,25,50,.028);
}
:root[data-theme="dark"]{
  --bg:#0e1220; --bg2:#131829; --card:#161b2c; --ink:#eef0f8; --ink-soft:#a7aec4; --line:#2a3050; --line-strong:#5a6390;
  --gray-soft:#1c2238;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px -12px rgba(0,0,0,.5);
  --e-bg:#23241f; --e-line:#8a8983; --e-ink:#d8d6cd;
  --p-bg:#16233a; --p-line:#4a8fd6; --p-title:#bcdcfc; --p-sub:#8fc0ee;
  --n-bg:#241a3a; --n-line:#9273d4; --n-title:#dcccfb; --n-sub:#b39bea;
  --d-bg:#3a2c14; --d-line:#c9903f; --d-ink:#f0dcb0;
  --g-bg:#0f2a20; --g-line:#3fa876; --g-ink:#a6e8c8;
  --r-bg:#2e161c; --r-line:#c9636f; --r-ink:#f0a8b0;
  --opt-bg: rgba(255,255,255,.05);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0e1220; --bg2:#131829; --card:#161b2c; --ink:#eef0f8; --ink-soft:#a7aec4; --line:#2a3050; --line-strong:#5a6390;
    --gray-soft:#1c2238;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px -12px rgba(0,0,0,.5);
    --e-bg:#23241f; --e-line:#8a8983; --e-ink:#d8d6cd;
    --p-bg:#16233a; --p-line:#4a8fd6; --p-title:#bcdcfc; --p-sub:#8fc0ee;
    --n-bg:#241a3a; --n-line:#9273d4; --n-title:#dcccfb; --n-sub:#b39bea;
    --d-bg:#3a2c14; --d-line:#c9903f; --d-ink:#f0dcb0;
    --g-bg:#0f2a20; --g-line:#3fa876; --g-ink:#a6e8c8;
    --r-bg:#2e161c; --r-line:#c9636f; --r-ink:#f0a8b0;
    --opt-bg: rgba(255,255,255,.05);
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; color:var(--ink); font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif; line-height:1.5; -webkit-font-smoothing:antialiased;
  background:var(--bg);
}
a{color:inherit}

/* ---------------- top navigation ---------------- */
.topnav{
  position:sticky; top:0; z-index:50; background:rgba(247,248,252,.88); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
:root[data-theme="dark"] .topnav, :root:not([data-theme="light"]) .topnav{ background:rgba(14,18,32,.86); }
.topnav-inner{max-width:1180px; margin:0 auto; padding:11px 20px; display:flex; align-items:center; gap:14px;}
.topnav-brand{display:flex; align-items:center; gap:9px; text-decoration:none; color:var(--ink); flex:0 0 auto;}
.topnav-logo{height:24px; width:auto;}
.topnav-brand span{font-size:13px; font-weight:700; letter-spacing:-.01em; white-space:nowrap;}
.topnav-links{flex:1; min-width:0; display:flex; gap:5px; overflow-x:auto; scrollbar-width:none;}
.topnav-links::-webkit-scrollbar{display:none}
.topnav-links a{
  flex:0 0 auto; font-size:12.5px; font-weight:600; color:var(--ink-soft); padding:7px 12px; border-radius:999px;
  text-decoration:none; white-space:nowrap; border:1px solid transparent; transition:background .15s,color .15s,border-color .15s;
}
.topnav-links a:hover{color:var(--p-title); background:var(--gray-soft);}
.topnav-links a.active{background:var(--p-bg); color:var(--p-title); border-color:var(--p-line);}

.theme-toggle-mini{
  flex:0 0 auto; width:32px; height:32px; border-radius:50%; border:1px solid var(--line); background:var(--gray-soft);
  cursor:pointer; font-size:14px; display:flex; align-items:center; justify-content:center;
}
.menu-toggle{
  display:none; flex:0 0 auto; width:34px; height:34px; border-radius:10px;
  border:1px solid var(--line); background:var(--gray-soft); color:var(--ink); font-size:16px; cursor:pointer;
  align-items:center; justify-content:center;
}

/* ---------------- mobile dropdown menu ---------------- */
.mobile-menu{display:none; position:fixed; inset:0; z-index:70;}
.mobile-menu.open{display:block;}
.mm-backdrop{position:absolute; inset:0; background:rgba(10,12,22,.45);}
.mobile-menu-panel{
  position:absolute; top:0; left:0; right:0; max-height:88vh; overflow-y:auto;
  background:var(--card); border-bottom:1px solid var(--line); border-radius:0 0 22px 22px;
  padding:14px 18px 26px; box-shadow:0 20px 50px -20px rgba(8,10,18,.4);
  transform:translateY(-100%); transition:transform .22s ease;
}
.mobile-menu.open .mobile-menu-panel{transform:translateY(0);}
.mm-head{display:flex; align-items:center; justify-content:space-between; padding-bottom:10px; margin-bottom:4px; border-bottom:1px solid var(--line);}
.mm-head span{font-size:13px; font-weight:700;}
.mm-close{width:32px; height:32px; border-radius:50%; border:1px solid var(--line); background:var(--gray-soft); cursor:pointer; font-size:14px;}
.mm-group{font-size:10.5px; font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--ink-soft); opacity:.7; margin:14px 4px 4px;}
.mm-group:first-of-type{margin-top:10px;}
.mm-links a{display:block; font-size:14px; font-weight:600; color:var(--ink); text-decoration:none; padding:10px 8px; border-radius:10px;}
.mm-links a:hover{background:var(--gray-soft);}
.mm-links a.active{background:var(--p-bg); color:var(--p-title);}

@media (max-width: 860px){
  .topnav-links{display:none;}
  .menu-toggle{display:flex;}
}

.main{max-width:980px; margin:0 auto; padding:30px clamp(16px,4vw,54px) 90px;}

.crumb{font-size:12px; color:var(--ink-soft); margin-bottom:14px;}
.crumb span{color:var(--ink); font-weight:600;}

.page-head{display:flex; gap:16px; align-items:flex-start; margin-bottom:22px;}
.page-head .ic{font-size:24px; width:52px; height:52px; border-radius:15px; background:var(--p-bg); display:flex; align-items:center; justify-content:center; flex:0 0 auto;}
.page-head h1{font-size:clamp(20px,3vw,26px); margin:2px 0 8px; letter-spacing:-.01em;}
.page-head p.sub{color:var(--ink-soft); font-size:14px; line-height:1.6; margin:0; max-width:640px;}

/* ---------------- hub / index page ---------------- */
.hero{
  position:relative; overflow:hidden; text-align:center; padding:50px 28px 44px; border-radius:26px;
  background:linear-gradient(160deg,#2b3044 0%,#14172380 60%,#0d0f18 100%), #14172a;
  box-shadow:0 24px 60px -24px rgba(8,10,18,.55), inset 0 1px 0 rgba(255,255,255,.06);
}
.hero::before{content:""; position:absolute; top:-25%; left:50%; transform:translateX(-50%); width:70%; height:65%; background:radial-gradient(circle, rgba(255,255,255,.14), transparent 70%); pointer-events:none;}
.hero-logo{position:relative; height:70px; width:auto; margin-bottom:18px; filter:drop-shadow(0 8px 22px rgba(0,0,0,.45));}
.hero .eyebrow{position:relative; display:inline-block; font-size:12px; font-weight:700; letter-spacing:.09em; color:#e4e9f9; background:rgba(255,255,255,.1); border:1px solid rgba(255,255,255,.16); padding:6px 14px; border-radius:999px; text-transform:uppercase;}
.hero h1{position:relative; font-size:clamp(24px,4vw,34px); margin:16px 0 10px; letter-spacing:-.02em; color:#f6f8fd;}
.hero p{position:relative; color:#b9c1d9; font-size:15px; max-width:560px; margin:0 auto; line-height:1.6;}

.hub-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:16px; margin-top:30px;}
.hub-group-label{font-size:11px; font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--ink-soft); opacity:.7; margin:30px 2px 4px;}
.hub-group-label:first-of-type{margin-top:8px;}
.hub-card{
  display:flex; flex-direction:column; gap:8px; background:var(--card); border:1px solid var(--line); border-radius:18px;
  padding:20px 20px 18px; text-decoration:none; color:var(--ink); box-shadow:var(--shadow); transition:transform .15s, border-color .15s;
}
.hub-card:hover{transform:translateY(-3px); border-color:var(--p-line);}
.hub-card .hc-ic{font-size:21px; width:42px; height:42px; border-radius:12px; background:var(--p-bg); display:flex; align-items:center; justify-content:center;}
.hub-card h3{font-size:14.5px; margin:2px 0 0; letter-spacing:-.01em;}
.hub-card p{font-size:12.5px; color:var(--ink-soft); margin:0; line-height:1.5;}
.hub-card .hc-go{margin-top:auto; font-size:12px; font-weight:700; color:var(--p-title);}

/* ---------------- legend bar ---------------- */
.legend-bar{
  display:flex; flex-wrap:wrap; gap:10px 18px; align-items:center; padding:12px 16px; margin-bottom:22px;
  background:var(--gray-soft); border:1px solid var(--line); border-radius:14px; font-size:12px; color:var(--ink-soft);
}
.legend-bar .grp{display:flex; align-items:center; gap:6px}
.legend-bar .shp{width:14px; height:14px; display:inline-block; flex:0 0 auto;}
.legend-bar .shp.el{border-radius:999px; background:var(--e-bg); border:1.5px solid var(--e-line);}
.legend-bar .shp.rc{border-radius:4px; background:var(--p-bg); border:1.5px solid var(--p-line);}
.legend-bar .shp.dm{background:var(--d-bg); border:1.5px solid var(--d-line); transform:rotate(45deg); width:10px; height:10px;}
.legend-bar .dot{width:10px; height:10px; border-radius:4px; display:inline-block;}
.legend-bar .dot.g{background:var(--g-line)} .legend-bar .dot.r{background:var(--r-line)} .legend-bar .dot.n{background:var(--n-line)}
.legend-bar .hint{width:100%; font-size:11.5px; opacity:.85; margin-top:1px;}

/* ---------------- content card ---------------- */
.content-card{background:var(--card); border:1px solid var(--line); border-radius:20px; box-shadow:var(--shadow); padding:32px clamp(16px,4vw,40px); scroll-margin-top:20px;}
.content-card + .content-card{margin-top:22px;}

.dg-tools{display:flex; justify-content:flex-end; gap:8px; margin-bottom:6px;}
.dg-btn{font-size:12px; font-weight:600; padding:7px 14px; border-radius:9px; border:1px solid var(--line); background:var(--bg); color:var(--ink-soft); cursor:pointer; transition:border-color .15s, color .15s;}
.dg-btn:hover{border-color:var(--p-line); color:var(--p-title);}

/* ---------------- diagram engine ---------------- */
.diagram{display:flex; flex-direction:column; align-items:center; margin-top:10px;}
.arrow-wrap{display:flex; flex-direction:column; align-items:center; margin:3px 0;}
.arrow-svg line, .arrow-svg path{stroke:var(--line-strong)}
.arrow-label{font-size:11px; font-weight:700; color:var(--ink-soft); background:var(--card); padding:0 6px; margin-top:-6px;}

.expand-box{width:100%; max-width:380px; display:flex; flex-direction:column; align-items:center;}
.node{width:100%;}
.node.ellipse{background:var(--e-bg); border:1px solid var(--e-line); color:var(--e-ink); border-radius:999px; padding:11px 26px; text-align:center; width:auto; margin:0 auto;}
.node.ellipse .title{font-weight:700; font-size:13.5px;}
.node.ellipse .sub{font-size:11.5px; opacity:.85; margin-top:2px;}

.node.rect{background:var(--p-bg); border:1px solid var(--p-line); border-radius:14px; padding:15px 36px 15px 18px; cursor:pointer; position:relative; transition:box-shadow .18s, transform .18s, border-color .18s;}
.node.rect:hover{box-shadow:0 10px 24px -10px rgba(20,25,50,.22); transform:translateY(-2px);}
.node.rect:focus-visible{outline:2px solid var(--p-line); outline-offset:2px;}
.node.rect .title{color:var(--p-title); font-weight:700; font-size:14px;}
.node.rect .sub{color:var(--p-sub); font-size:12.5px; margin-top:3px;}
.node.rect.note{background:var(--n-bg); border-color:var(--n-line);}
.node.rect.note .title{color:var(--n-title)} .node.rect.note .sub{color:var(--n-sub)}
.node.rect.choice .title{margin-bottom:2px;}

.chev{position:absolute; top:16px; right:12px; width:15px; height:15px; color:var(--ink-soft); opacity:.65; transition:transform .2s;}
.expand-box.open .node.rect .chev{transform:rotate(180deg);}
.detail{max-height:0; overflow:hidden; opacity:0; width:100%; transition:max-height .28s ease, opacity .22s ease, margin .22s ease;}
.expand-box.open .detail{max-height:420px; opacity:1; margin-top:8px;}
.detail-inner{background:var(--gray-soft); border:1px solid var(--line); border-radius:10px; padding:10px 13px; width:100%;}
.detail-inner p{margin:0 0 7px; font-size:13px; color:var(--ink-soft);}
.detail-inner p:last-child{margin-bottom:0}
code.f{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace; font-size:11px; background:rgba(0,0,0,.06); color:var(--ink-soft); padding:2px 7px; border-radius:6px; display:inline-block;}
:root[data-theme="dark"] code.f{background:rgba(255,255,255,.08)}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) code.f{background:rgba(255,255,255,.08)} }

.opts{display:grid; grid-template-columns:repeat(auto-fit,minmax(130px,1fr)); gap:8px; margin-top:9px;}
.opt{background:var(--opt-bg); border:1px solid var(--line); border-radius:9px; padding:8px 10px;}
.opt b{display:block; font-size:11.5px; margin-bottom:2px; color:var(--ink);}
.opt span{font-size:11.5px; color:var(--ink-soft); line-height:1.35;}

.diamond-wrap{position:relative; width:194px; height:194px; margin:6px auto; cursor:pointer;}
.diamond-shape{position:absolute; inset:34px; background:var(--d-bg); border:1px solid var(--d-line); transform:rotate(45deg); border-radius:14px; transition:box-shadow .18s;}
.diamond-wrap:hover .diamond-shape{box-shadow:0 10px 24px -10px rgba(20,25,50,.22);}
.diamond-wrap:focus-visible .diamond-shape{outline:2px solid var(--d-line); outline-offset:2px;}
.diamond-text{position:absolute; inset:0; display:flex; align-items:center; justify-content:center; text-align:center; padding:0 40px; font-weight:700; font-size:12.5px; color:var(--d-ink);}
.diamond-box .detail{max-width:340px;}
.diamond-box.expand-box{max-width:none;}

.branches{display:flex; gap:22px; flex-wrap:wrap; justify-content:center; margin-top:4px; width:100%;}
.branch-col{display:flex; flex-direction:column; align-items:center; flex:1 1 210px; max-width:270px;}
.blabel{font-size:11px; font-weight:700; padding:5px 13px; border-radius:999px; margin-bottom:0; text-align:center;}
.blabel.ok{background:var(--g-bg); color:var(--g-ink); border:1px solid var(--g-line)}
.blabel.bad{background:var(--r-bg); color:var(--r-ink); border:1px solid var(--r-line)}
.blabel.warn{background:var(--d-bg); color:var(--d-ink); border:1px solid var(--d-line)}
.blabel.neutral{background:var(--gray-soft); color:var(--ink-soft); border:1px solid var(--line)}

.node.end{background:var(--g-bg); border:1px solid var(--g-line); color:var(--g-ink); border-radius:999px; padding:12px 20px; text-align:center;}
.node.end .title{font-weight:700; font-size:12.5px;}
.node.end .sub{font-weight:500; font-size:11px; margin-top:3px; opacity:.9;}
.node.end.t-red{background:var(--r-bg); border-color:var(--r-line); color:var(--r-ink);}
.node.end.t-amber{background:var(--d-bg); border-color:var(--d-line); color:var(--d-ink);}
.node.end.t-neutral{background:var(--gray-soft); border-color:var(--line); color:var(--ink-soft);}

/* ---------------- table / roles / lanes / callouts ---------------- */
table.cmp{width:100%; border-collapse:collapse; margin-top:4px; font-size:13.5px; border-radius:12px; overflow:hidden;}
table.cmp th, table.cmp td{border:1px solid var(--line); padding:11px 13px; text-align:left;}
table.cmp th{background:var(--gray-soft); font-size:12.5px; text-transform:uppercase; letter-spacing:.03em; color:var(--ink-soft);}
table.cmp td.center, table.cmp th.center{text-align:center;}
table.cmp tr td:first-child{font-weight:600;}
.yes{color:var(--g-line); font-weight:700;} .no{color:var(--ink-soft);}

.roles{display:grid; gap:16px; grid-template-columns:repeat(auto-fit,minmax(210px,1fr)); margin-top:4px;}
.role-card{border:1px solid var(--line); border-radius:14px; padding:18px 19px; background:var(--gray-soft);}
.role-card h4{margin:0 0 8px; font-size:14px;}
.role-card ul{margin:0; padding-left:18px; font-size:13px; color:var(--ink-soft); line-height:1.6;}
.role-card p{margin:0}

.lanes{display:grid; gap:24px; grid-template-columns:1fr; margin-top:4px;}
@media(min-width:800px){ .lanes.two{grid-template-columns:1fr 1fr;} }
.lane{border:1px dashed var(--line); border-radius:16px; padding:20px;}
.lane h3{margin:0 0 12px; font-size:14.5px; display:flex; align-items:center; gap:8px;}

.callout{margin-top:20px; padding:16px 18px; border-radius:14px; font-size:13.5px; border:1px solid var(--d-line); background:var(--d-bg); color:var(--ink); line-height:1.6;}
.callout b{color:var(--d-ink)}
.callout.info{border-color:var(--line); background:var(--gray-soft)}
.callout.info b{color:var(--p-title)}
.callout:first-child{margin-top:0}

/* ---------------- pagination ---------------- */
.pager{display:flex; justify-content:space-between; gap:14px; margin-top:28px; flex-wrap:wrap;}
.pager-link{
  flex:1 1 220px; border:1px solid var(--line); background:var(--card); border-radius:14px; padding:13px 18px;
  text-decoration:none; color:var(--ink); font-size:13px; box-shadow:var(--shadow); transition:border-color .15s, transform .15s;
}
.pager-link:hover{border-color:var(--p-line); transform:translateY(-2px);}
.pager-link .pg-dir{display:block; font-size:10.5px; font-weight:700; letter-spacing:.06em; text-transform:uppercase; color:var(--ink-soft); margin-bottom:3px;}
.pager-link .pg-title{font-weight:700; font-size:13.5px;}
.pager-link.next{text-align:right;}

footer.note{text-align:center; color:var(--ink-soft); font-size:12px; margin-top:44px; padding-top:20px; border-top:1px solid var(--line);}

@media print{
  .topnav, .mobile-menu, .pager, .dg-tools{display:none !important;}
  .main{padding:0 !important; max-width:none;}
  .content-card{break-inside:avoid; box-shadow:none;}
  body{background:#fff}
  .expand-box .detail{max-height:none!important; opacity:1!important; margin-top:8px!important;}
}