/* Single light theme, deliberately not theme-aware.
   Redoc has no dark mode, so following prefers-color-scheme here would render this page
   dark beside a permanently light reference page. --ground matches Redoc's centre column
   (#fff) so the two read as one site. */
:root{
  --ground:#FFFFFF; --surface:#FFFFFF; --surface-2:#F5F7FA; --line:#D9DFE6;
  --ink:#131A22; --ink-2:#4A5765; --ink-3:#77828F; --accent:#2A6F97; --gap:#8A6318; --gap-soft:#F7EEDC;
}
*{box-sizing:border-box}
body{margin:0;background:var(--ground);color:var(--ink);
  font:15px/1.6 "IBM Plex Sans",system-ui,-apple-system,sans-serif;
  -webkit-font-smoothing:antialiased}
.wrap{max-width:860px;margin:0 auto;padding:40px 22px 80px}

/* topbar shared with index.html */
.topbar{position:sticky;top:0;z-index:60;background:var(--surface);
  border-bottom:1px solid var(--line);display:flex;align-items:center;gap:20px;
  padding:0 20px;min-height:56px;flex-wrap:wrap}
.brand{font-family:Archivo,system-ui,sans-serif;font-weight:700;font-size:16px;
  letter-spacing:-.01em;white-space:nowrap;text-decoration:none;color:var(--ink)}
.brand span{color:var(--accent)}
.navlinks{display:flex;gap:18px;flex:1;flex-wrap:wrap;min-width:0}
.navlinks a{font-size:13.5px;color:var(--ink-2);text-decoration:none;padding:16px 0;
  border-bottom:2px solid transparent;white-space:nowrap}
.navlinks a:hover{color:var(--accent)}
.navlinks a.active{color:var(--ink);border-bottom-color:var(--accent);font-weight:500}
.navlinks a:focus-visible,.brand:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
a{color:var(--accent)}
h1{font-family:Archivo,system-ui,sans-serif;font-size:31px;line-height:1.15;margin:0 0 10px;letter-spacing:-.02em}
h2{font-family:Archivo,system-ui,sans-serif;font-size:20px;margin:38px 0 10px;letter-spacing:-.01em;
  padding-bottom:7px;border-bottom:1px solid var(--line)}
h3{font-size:15.5px;margin:26px 0 7px}
p,li{color:var(--ink-2);max-width:68ch}
.lede{font-size:17px;color:var(--ink-2);margin:0 0 8px}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.7px;
  background:var(--surface-2);padding:1.5px 5px;border-radius:3px;color:var(--ink)}
pre{background:var(--surface-2);border:1px solid var(--line);border-radius:8px;
  padding:14px 16px;overflow-x:auto}
pre code{background:none;padding:0;font-size:12.5px;line-height:1.65}
table{width:100%;border-collapse:collapse;font-size:13.5px;margin:12px 0}
th{text-align:left;font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--ink-3);padding:8px 10px;border-bottom:1px solid var(--line)}
td{padding:8px 10px;border-bottom:1px solid var(--line);color:var(--ink-2);vertical-align:top}
.note{border:1px solid var(--line);border-left:3px solid var(--gap);background:var(--gap-soft);
  border-radius:7px;padding:13px 16px;margin:18px 0}
.note strong{color:var(--ink)}
.note p{margin:0;color:var(--ink-2)}
.tag{display:inline-block;font-size:10.5px;letter-spacing:.05em;text-transform:uppercase;
  padding:2px 7px;border-radius:4px;background:var(--gap-soft);color:var(--gap);
  border:1px solid var(--line);vertical-align:middle;margin-left:6px}

/* analysis reference: field tables */
.ftab{width:100%;border-collapse:collapse;font-size:13px;margin:10px 0 22px}
.ftab th{text-align:left;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--ink-3);padding:8px 10px;border-bottom:1px solid var(--line);font-weight:500}
.ftab td{padding:7px 10px;border-bottom:1px solid var(--line);color:var(--ink-2);vertical-align:top}
.ftab tr:last-child td{border-bottom:0}
.ftab td:first-child{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;
  color:var(--ink);white-space:nowrap}
.ftab .u{font-family:ui-monospace,monospace;font-size:11.5px;white-space:nowrap;color:var(--ink)}
.ftab .grp td{background:var(--surface-2);font-weight:600;color:var(--ink);font-family:inherit;
  font-size:11px;letter-spacing:.06em;text-transform:uppercase}
.ftab .none{color:var(--ink-3)}
.tw{overflow-x:auto}
.warn{border:1px solid var(--line);border-left:3px solid var(--crit,#A63D40);background:#FBEDED;
  border-radius:7px;padding:13px 16px;margin:18px 0}
.warn p{margin:0 0 7px;color:var(--ink-2)}
.warn p:last-child{margin:0}
.warn strong{color:var(--ink)}

/* collapsible family sections */
details.fam{border:1px solid var(--line);border-radius:9px;margin:12px 0;background:var(--surface);
  overflow:hidden}
details.fam[open]{box-shadow:0 1px 2px rgba(19,26,34,.05)}
details.fam > summary{
  list-style:none;cursor:pointer;padding:15px 18px;display:flex;gap:14px;align-items:baseline;
  flex-wrap:wrap;background:var(--surface-2);
}
details.fam > summary::-webkit-details-marker{display:none}
details.fam > summary::before{
  content:"\25B8";color:var(--ink-3);font-size:12px;flex:none;
  transform:translateY(-1px);transition:transform .12s;
}
details.fam[open] > summary::before{transform:rotate(90deg) translateX(-1px)}
details.fam > summary:hover{background:#EEF2F6}
details.fam > summary:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}
.fam-name{font-family:Archivo,system-ui,sans-serif;font-weight:600;font-size:16.5px;color:var(--ink)}
.fam-meta{font-size:13px;color:var(--ink-3);flex:1;min-width:150px}
.fam-body{padding:4px 18px 20px}
.fam-body > h3:first-of-type{margin-top:18px}
.famctl{display:flex;gap:8px;margin:14px 0 4px}
.famctl button{font-family:ui-monospace,monospace;font-size:11.5px;padding:6px 12px;border-radius:7px;
  border:1px solid var(--line);background:var(--surface);color:var(--ink-2);cursor:pointer}
.famctl button:hover{border-color:var(--accent);color:var(--ink)}
.famctl button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* floating return-to-index control */
.backtop{
  position:fixed;left:20px;bottom:20px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 15px;border-radius:24px;
  background:var(--accent);color:#fff;text-decoration:none;
  font-size:13.5px;font-weight:500;line-height:1;
  box-shadow:0 2px 4px rgba(19,26,34,.16),0 8px 22px -10px rgba(19,26,34,.45);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .16s ease,transform .16s ease,visibility .16s;
}
.backtop.on{opacity:1;visibility:visible;transform:translateY(0)}
.backtop:hover{background:#235B7C}
.backtop:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
.backtop .arw{font-size:14px;line-height:1;transform:translateY(-1px)}
@media (max-width:520px){
  .backtop{left:12px;bottom:12px;padding:9px 13px;font-size:12.5px}
}
@media (prefers-reduced-motion:reduce){
  .backtop{transition:none}
}

/* example responses nested inside a family */
details.ex{border:1px solid var(--line);border-radius:7px;margin:10px 0;background:var(--surface-2)}
details.ex > summary{
  list-style:none;cursor:pointer;padding:9px 13px;display:flex;gap:9px;align-items:baseline;
  font-size:13px;color:var(--ink-2);
}
details.ex > summary::-webkit-details-marker{display:none}
details.ex > summary::before{content:"\25B8";color:var(--ink-3);font-size:11px;transition:transform .12s}
details.ex[open] > summary::before{transform:rotate(90deg)}
details.ex > summary:hover{color:var(--ink)}
details.ex > summary:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}
details.ex .exname{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;color:var(--ink)}
details.ex .exmeta{color:var(--ink-3);font-size:12px}
details.ex pre{margin:0;border:0;border-top:1px solid var(--line);border-radius:0 0 6px 6px;background:var(--surface)}
.exnote{font-size:13px;color:var(--ink-3);margin:14px 0 6px}