:root{
  --bg:#F3F5F0; --surface:#FFFFFF; --ink:#1B2419; --muted:#5B6657; --line:#DCE2D6; --soft:#E8EDE3;
  --thermo:#C2522B; --bio:#1F7A6B; --lipid:#B5890F; --upgrade:#4B57A8; --beccs:#5E6B78;
  --good:#2E7D32; --warn:#B7791F; --crit:#B3261E; --br:#009C3B;
  --display:"Bricolage Grotesque",ui-sans-serif,system-ui,sans-serif;
  --body:"IBM Plex Sans",ui-sans-serif,system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --bg:#121712; --surface:#1A211A; --ink:#E6ECE2; --muted:#9AA696; --line:#2C362B; --soft:#232C22;
    --thermo:#E88560; --bio:#4FC2AE; --lipid:#E0B53E; --upgrade:#8F9BEA; --beccs:#A3B0BD;
    --good:#6CC070; --warn:#E3A948; --crit:#EE7A70; --br:#3FC46A;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#121712; --surface:#1A211A; --ink:#E6ECE2; --muted:#9AA696; --line:#2C362B; --soft:#232C22;
  --thermo:#E88560; --bio:#4FC2AE; --lipid:#E0B53E; --upgrade:#8F9BEA; --beccs:#A3B0BD;
  --good:#6CC070; --warn:#E3A948; --crit:#EE7A70; --br:#3FC46A;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:16px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:15.5px;line-height:1.55;padding:0 16px 56px;overflow-x:clip}
.wrap{max-width:1180px;margin:0 auto;display:flex;flex-direction:column;gap:36px}
h1,h2,h3{font-family:var(--display);text-wrap:balance;margin:0;letter-spacing:-.01em}
h1{font-size:clamp(30px,4.6vw,48px);font-weight:700;line-height:1.05;max-width:20ch}
h2{font-size:24px;font-weight:700}
h3{font-size:12.5px;font-family:var(--body);font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
a{color:inherit}
.muted{color:var(--muted)}
.skip{position:absolute;left:-999px;top:8px;background:var(--surface);padding:8px 12px;border-radius:8px}
.skip:focus{left:16px;z-index:50}

.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0 0;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:700;font-size:17px}
.brand .by{font-family:var(--mono);font-size:11.5px;font-weight:400;color:var(--muted);letter-spacing:.04em}
.mark{width:22px;height:22px;border-radius:6px;background:conic-gradient(from 210deg,var(--thermo),var(--lipid),var(--bio),var(--upgrade),var(--beccs),var(--thermo));display:inline-block;flex:none}
.topnav{display:flex;gap:16px;font-size:14px;color:var(--muted)}
.topnav a{text-decoration:none}
.topnav a:hover{color:var(--ink)}

.hero{padding-top:8px}
.lede{max-width:70ch;color:var(--muted);margin:12px 0 0;font-size:16.5px}
.lede b{color:var(--ink);font-weight:600}
.legend{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:18px;font-size:13.5px;color:var(--muted)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.dot{width:10px;height:10px;border-radius:50%;background:var(--c);flex:none}

/* tree */
.treewrap{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px 18px 8px}
.treehead{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap}
.treehead p{margin:0;font-size:13.5px}
.treecanvas{overflow-x:auto;overflow-y:hidden;margin-top:8px}
#treesvg{display:block;width:100%;min-width:720px;height:auto;font-family:var(--body)}
.mat{display:inline-block;padding:1px 8px;border-radius:999px;border:1px solid var(--line);font-size:12px;margin-left:2px}
.m-commercial{border-color:color-mix(in srgb,var(--good) 60%,transparent);color:var(--good)}
.m-early{border-color:color-mix(in srgb,var(--warn) 60%,transparent);color:var(--warn)}
.m-pilot{border-color:color-mix(in srgb,var(--crit) 60%,transparent);color:var(--crit)}
#treesvg .link{fill:none;stroke:var(--line);stroke-width:1.5}
#treesvg .link.fam{stroke:color-mix(in srgb,var(--c) 55%,transparent);stroke-width:2}
#treesvg .node text{fill:var(--ink);font-size:12.5px}
#treesvg .node.root text{font-family:var(--mono);font-size:12px;letter-spacing:.08em;fill:var(--muted)}
#treesvg .node.fam text{font-weight:600;font-size:13.5px}
#treesvg .node.route{cursor:pointer}
#treesvg .node.route:hover text,#treesvg .node.route.on text{font-weight:600}
#treesvg .node.route.on circle{stroke-width:3}
#treesvg .ring{fill:none;stroke-width:2}
#treesvg .sub{fill:var(--muted);font-size:11px}

/* explorer */
.explorer{display:grid;grid-template-columns:300px 1fr;gap:20px;align-items:start}
@media (max-width:860px){.explorer{grid-template-columns:1fr}}
.sidebar{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px;display:flex;flex-direction:column;gap:6px}
@media (min-width:861px){.sidebar{position:sticky;top:12px;max-height:calc(100vh - 24px);overflow:auto}}
.root{font-family:var(--mono);font-size:12px;color:var(--muted);padding:4px 8px 2px;letter-spacing:.06em}
.fam{display:flex;flex-direction:column}
.famhead{display:flex;align-items:center;gap:8px;padding:8px;font-weight:600;font-size:14px}
.famhead .n{font-family:var(--mono);font-size:11px;color:var(--muted);font-weight:400;margin-left:auto;text-align:right}
.routes{list-style:none;margin:0 0 4px 13px;padding:0 0 0 12px;border-left:2px solid color-mix(in srgb,var(--c) 45%,transparent);display:flex;flex-direction:column;gap:1px}
.routes button{all:unset;box-sizing:border-box;width:100%;cursor:pointer;padding:7px 8px;border-radius:6px;font-size:14px;display:flex;justify-content:space-between;gap:8px;color:var(--ink);align-items:center}
.routes button small{font-family:var(--mono);font-size:11px;color:var(--muted);white-space:nowrap}
.routes button:hover{background:var(--soft)}
.routes button:focus-visible{outline:2px solid var(--c);outline-offset:1px}
.routes button[aria-current="true"]{background:color-mix(in srgb,var(--c) 16%,var(--surface));font-weight:600}

.detail{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:26px;display:flex;flex-direction:column;gap:24px;border-top:4px solid var(--c);min-width:0}
@media (max-width:640px){.detail{padding:18px}}
.eyebrow{font-family:var(--mono);font-size:12px;color:var(--c);letter-spacing:.06em;text-transform:uppercase}
.dtitle{display:flex;flex-direction:column;gap:6px}
.dtitle h2{font-size:clamp(24px,3vw,34px)}
.dtitle p{margin:0;color:var(--muted);max-width:70ch;font-size:16px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{font-size:12.5px;padding:3px 10px;border-radius:999px;border:1px solid var(--line);background:var(--soft);white-space:nowrap}
.chip.m-commercial{background:transparent}.chip.m-early{background:transparent}.chip.m-pilot{background:transparent}

.flow{display:flex;flex-wrap:wrap;align-items:stretch;gap:0;row-gap:10px}
.step{display:flex;align-items:center}
.box{background:var(--soft);border:1px solid var(--line);border-radius:8px;padding:8px 11px;font-size:13.5px;line-height:1.3;max-width:220px}
.box b{display:block;font-family:var(--mono);font-size:10.5px;font-weight:500;color:var(--c);letter-spacing:.06em;text-transform:uppercase;margin-bottom:2px}
.step.out .box{background:color-mix(in srgb,var(--c) 14%,var(--surface));border-color:color-mix(in srgb,var(--c) 45%,transparent);font-weight:600}
.arrow{color:var(--c);font-family:var(--mono);padding:0 6px;font-size:16px}
.side{margin-top:4px;display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--muted)}
.side span{border:1px dashed var(--line);border-radius:6px;padding:4px 9px}
.side span::before{content:"↳ ";color:var(--c)}

.grid2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
@media (max-width:640px){.grid2{grid-template-columns:1fr}}
.blockx{display:flex;flex-direction:column;gap:8px;min-width:0}
.blockx ul{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:4px}
.blockx p{margin:0}

.meters{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media (max-width:640px){.meters{grid-template-columns:1fr}}
.meter{border:1px solid var(--line);border-radius:8px;padding:10px 12px;display:flex;flex-direction:column;gap:6px}
.meter .k{font-size:12px;color:var(--muted)}
.meter .v{font-family:var(--mono);font-size:14.5px;font-variant-numeric:tabular-nums}
.bar{height:6px;background:var(--soft);border-radius:3px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--c);border-radius:3px}
.br{border-left:3px solid var(--br);padding:10px 14px;background:var(--soft);border-radius:0 8px 8px 0;font-size:14.5px}
.br b{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--muted);display:block;margin-bottom:2px}

/* prose from the route files */
.prose{display:flex;flex-direction:column;gap:18px;border-top:1px solid var(--line);padding-top:20px}
.prose section{display:flex;flex-direction:column;gap:6px}
.prose h3{color:var(--c)}
.prose p{margin:0;max-width:78ch;font-size:15.5px;line-height:1.65}
.prose ul{margin:0;padding-left:18px;max-width:78ch}
.prose li+li{margin-top:4px}
.prose a{word-break:break-all;color:var(--muted)}
.prose code{font-family:var(--mono);font-size:13px;background:var(--soft);padding:1px 5px;border-radius:4px}
.neighbors{display:flex;flex-wrap:wrap;gap:8px}
.neighbors button{all:unset;cursor:pointer;font-size:13px;padding:5px 11px;border-radius:999px;border:1px solid var(--line);background:var(--soft)}
.neighbors button:hover{border-color:var(--c)}

/* matrix */
.block{display:flex;flex-direction:column;gap:12px}
.tablewrap{overflow-x:auto;background:var(--surface);border:1px solid var(--line);border-radius:12px}
table{border-collapse:collapse;width:100%;min-width:760px;font-size:13.5px}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:11.5px;font-weight:600;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);background:var(--soft)}
tbody tr{cursor:pointer}
tbody tr:hover{background:var(--soft)}
td.num{font-family:var(--mono);font-variant-numeric:tabular-nums;white-space:nowrap}
td .name{display:flex;align-items:center;gap:8px;font-weight:600}
.pips{display:inline-flex;gap:3px}
.pips i{width:9px;height:9px;border-radius:2px;background:var(--line)}
.pips i.on{background:var(--warn)}

/* rules */
.rules{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px}
.rule{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 16px;display:flex;flex-direction:column;gap:6px}
.rule .n{font-family:var(--mono);font-size:12px;color:var(--muted)}
.rule h4{margin:0;font-family:var(--display);font-size:17px;font-weight:700;line-height:1.2}
.rule p{margin:0;font-size:13.5px;color:var(--muted)}
.foot{font-size:12.5px;color:var(--muted);max-width:80ch}
.foot p{margin:0 0 6px}
@media (prefers-reduced-motion:no-preference){.detail{transition:border-color .2s}}