/* Wysebridge Reference — one editorial system for every site in the network.
   Parchment ground, dark ink, one accent (Wysebridge blue). Rules, not boxes. */
:root{
  --paper:#F5F2E9;      /* parchment */
  --ink:#1E2430;        /* body text */
  --ink-soft:#4A5160;   /* secondary text */
  --muted:#6E7280;      /* captions, meta */
  --line:#DCD7C9;       /* hairlines */
  --accent:#1D4E89;     /* the one color */
  --wash:#ECE7DA;       /* hover / table head */
  --serif:"Newsreader",Georgia,"Times New Roman",serif;
  --sans:"Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.7 var(--sans);font-feature-settings:"kern","liga"}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:4px}
a:hover{text-decoration-thickness:2px}
a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.skip{position:absolute;left:-10000px}
.skip:focus{left:20px;top:14px;background:var(--paper);padding:8px 12px;z-index:5;border:1px solid var(--ink)}
p,ul,ol{margin:0 0 18px}
hr{border:0;border-top:1px solid var(--line);margin:16px 0}

/* edition line + masthead */
.edition{display:flex;justify-content:space-between;gap:16px;padding:9px 4%;border-bottom:1px solid var(--line);font-size:12px;color:var(--ink-soft)}
.masthead{display:flex;align-items:center;gap:32px;padding:26px 4%;border-bottom:1px solid var(--ink)}
.brand{display:flex;flex-direction:column;margin-right:auto;text-decoration:none;color:var(--ink)}
.brand-name{font:600 25px/1.1 var(--serif);letter-spacing:-.01em}
.brand-sub{font-size:12px;color:var(--accent);margin-top:5px}
.mainnav{display:flex;gap:26px;font-size:14px}
.mainnav a{color:var(--ink);text-decoration:none}
.mainnav a:hover,.mainnav a[aria-current=page]{text-decoration:underline}
.cta{font-size:14px;font-weight:500;text-decoration:none;border-bottom:1px solid var(--accent);padding:4px 0;white-space:nowrap}

/* frame */
main{max-width:1400px;margin:0 auto;padding:22px 4% 88px}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0 0 36px;padding:0;font-size:12px;color:var(--muted)}
.crumbs li+li::before{content:"/";margin-right:8px;color:var(--line)}
.crumbs a{color:inherit}
.grid{display:grid;grid-template-columns:170px minmax(0,1fr) 240px;gap:48px;align-items:start}
.entry{min-width:0;max-width:720px}

/* left rail */
.explore{position:sticky;top:24px;font-size:13px;padding-right:20px;border-right:1px solid var(--line)}
.explore a{display:block;color:var(--ink);text-decoration:none;margin:0 0 10px;line-height:1.35}
.explore a:hover,.explore a[aria-current=page]{color:var(--accent);text-decoration:underline}
.eyebrow{font-size:12px;font-weight:600;color:var(--accent);margin:0 0 12px;letter-spacing:.01em}

/* type */
.kicker{font-size:13px;font-weight:500;color:var(--accent);margin:0 0 8px}
.kicker a{text-decoration:none}
h1{font:500 clamp(38px,4.6vw,62px)/1.04 var(--serif);letter-spacing:-.025em;margin:0 0 28px;font-variation-settings:"opsz" 72}
h2{font:500 30px/1.18 var(--serif);letter-spacing:-.015em;margin:0 0 18px}
h2 a{color:inherit}
h3{font:500 21px/1.3 var(--serif);margin:26px 0 8px}
.lede{font-size:19px;line-height:1.6;color:var(--ink-soft)}

/* answer in brief: ruled, not boxed */
.answer{border-top:3px solid var(--accent);padding:22px 0 6px;margin:0 0 28px}
.answer p{font-size:20px;line-height:1.55}
.answer strong{font-weight:600}
.answer .caveat{font-size:13px;line-height:1.55;color:var(--muted)}

/* contents */
.toc{border:1px solid var(--line);padding:18px 24px 14px;margin:0 0 36px;font-size:13px}
.toc ol{columns:2;column-gap:32px;padding-left:18px;margin:0}
.toc li{break-inside:avoid;padding:2px 0}

/* sections ruled */
.entry section{margin-top:44px;padding-top:30px;border-top:1px solid var(--line)}
.entry section.answer{margin-top:0;padding:22px 0 6px;border-top:3px solid var(--accent)}

/* entity graph: drawn nodes joined by rules */
.graph{margin:0 0 8px}
.graph ol{list-style:none;display:flex;margin:0;padding:0}
.graph li{flex:1;display:flex;align-items:center;min-width:0}
.graph li+li::before{content:"";flex:0 0 22px;border-top:1px solid var(--accent)}
.graph a,.graph span{flex:1;display:flex;align-items:center;justify-content:center;text-align:center;min-height:64px;padding:10px;border:1px solid var(--accent);background:var(--paper);color:var(--ink);text-decoration:none;font-size:13px;line-height:1.3}
.graph a:hover{background:var(--wash)}
.graph span{border-style:dashed}
.graph figcaption{font-size:12px;color:var(--muted);text-align:center;margin-top:12px}

/* entry directory: ruled two-column list */
.directory{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 32px}
.item{display:flex;flex-direction:column;gap:6px;padding:20px 0 22px;border-top:1px solid var(--line);color:var(--ink);text-decoration:none}
.item-topic{font-size:12px;font-weight:500;color:var(--accent)}
.item-title{font:500 21px/1.25 var(--serif);letter-spacing:-.01em}
.item-desc{font-size:14px;line-height:1.55;color:var(--ink-soft)}
.item-go{font-size:13px;color:var(--accent);text-decoration:underline;text-underline-offset:4px;margin-top:4px}
.item:hover .item-title{color:var(--accent)}
.paths{display:flex;flex-wrap:wrap;gap:10px}
.paths a{border:1px solid var(--line);padding:9px 14px;font-size:13px;text-decoration:none;color:var(--ink)}
.paths a:hover{border-color:var(--accent);color:var(--accent)}

/* Q&A */
.qa{border-bottom:1px solid var(--line);padding:16px 0}
.qa:first-of-type{border-top:1px solid var(--line)}
.qa summary{cursor:pointer;font-weight:500;line-height:1.45}
.qa div{padding-top:10px;font-size:15px;color:var(--ink-soft)}

/* sources */
.sources{padding-left:20px}
.sources li{margin-bottom:12px}
.src-pub{font-size:12px;color:var(--muted)}
.src-pub::before{content:"— "}
.src-note{font-size:14px;color:var(--ink-soft)}
.fineprint{font-size:13px;color:var(--muted)}

/* network + cite */
.entry section.network{border-top:1px solid var(--ink)}
.net-list{padding-left:20px}
.cite p{font-size:14px;color:var(--ink-soft)}

/* right record */
.record{position:sticky;top:24px;border-top:3px solid var(--ink);padding-top:18px;font-size:13px}
.record h2{font-size:36px;margin:0 0 6px}
.record dl{margin:0}
.record dl div{padding:12px 0;border-bottom:1px solid var(--line)}
.record dt{font-size:12px;color:var(--muted)}
.record dd{margin:3px 0 0;font-size:14px;overflow-wrap:anywhere}
.record-links{display:flex;flex-direction:column;gap:8px;margin:16px 0 0}

/* tables: hairlines only */
.table-wrap{overflow-x:auto;margin:0 0 18px;border-top:1px solid var(--ink)}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{text-align:left;padding:11px 12px 11px 0;border-bottom:1px solid var(--line);vertical-align:top}
thead th{font-size:12px;font-weight:600;color:var(--ink-soft)}
tbody th{font-weight:500}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;padding-right:0}

/* steps: real sequences only */
.plain{padding-left:20px}
.steps{counter-reset:s;list-style:none;padding:0}
.steps li{counter-increment:s;position:relative;padding:0 0 14px 40px}
.steps li::before{content:counter(s);position:absolute;left:0;top:-2px;font:500 22px/1 var(--serif);color:var(--accent)}
.callout{border-left:3px solid var(--accent);padding:4px 0 4px 18px;margin:0 0 18px}
.button{display:inline-block;border:1px solid var(--accent);color:var(--accent);text-decoration:none;padding:10px 16px;font-weight:500}
.button:hover{background:var(--accent);color:var(--paper)}
.glossary div{border-bottom:1px solid var(--line);padding:14px 0}
.glossary dt{font:500 20px var(--serif)}
.glossary dd{margin:4px 0 0;color:var(--ink-soft)}

/* footer */
.foot{border-top:1px solid var(--ink);padding:36px 4%;font-size:13px}
.foot-grid{max-width:1400px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
.foot-brand{font:600 18px var(--serif);margin:0}
.foot-sub{color:var(--accent);font-size:12px;margin:2px 0 12px}
.disclosure{color:var(--ink-soft);max-width:60ch}
.foot nav{display:flex;flex-direction:column;gap:6px}
.foot nav a{color:var(--ink)}
.foot-label{font-size:12px;color:var(--muted);margin:0}

/* responsive */
@media (max-width:1120px){
  .grid{grid-template-columns:minmax(0,1fr) 230px;gap:36px}
  .explore{display:none}
}
@media (max-width:820px){
  .masthead{flex-wrap:wrap;gap:14px 24px;padding:20px 5%}
  .brand{width:100%}
  .mainnav{gap:18px}
  main{padding:18px 5% 64px}
  .grid{grid-template-columns:1fr;gap:12px}
  .record{position:static}
  .directory{grid-template-columns:1fr}
  .toc ol{columns:1}
  .graph ol{flex-direction:column;align-items:stretch}
  .graph li{flex-direction:column}
  .graph li+li::before{flex:0 0 16px;border-top:0;border-left:1px solid var(--accent)}
  .graph a,.graph span{width:100%;min-height:48px}
  .edition{font-size:11px;padding:8px 5%}
  .edition span:first-child{display:none}
  .foot-grid{grid-template-columns:1fr}
  .answer p{font-size:18px}
}
.answer .eyebrow{font-size:12px;line-height:1.4;margin:0 0 10px}
th.num{white-space:nowrap}
.share{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:14px;color:var(--ink-soft)}
.share a{color:var(--accent)}
/* Related references directory */
.net-site{border-top:1px solid var(--line);padding:18px 0 6px}
.net-site h3{margin:0}
.net-self{font-family:var(--sans);font-size:.72rem;letter-spacing:.04em;color:var(--accent);border:1px solid currentColor;padding:1px 6px;margin-left:6px;vertical-align:middle;font-weight:500}
.net-domain{margin:2px 0 6px;font-size:.85rem;color:var(--muted)}
.net-q{font-family:var(--serif);font-style:italic;font-size:1.08rem;margin:0 0 4px}
.net-meta{display:grid;grid-template-columns:190px 1fr;gap:6px 16px;margin:10px 0;font-size:.92rem}
.net-meta dt{font-weight:600}
.net-meta dd{margin:0}
@media (max-width:820px){.net-meta{grid-template-columns:1fr}.net-meta dd{margin-bottom:8px}}
/* Practice questions */
.stem{font-family:var(--serif);font-size:1.12rem;line-height:1.5}
.choices{padding-left:24px}
.choices li{padding:6px 0;border-bottom:1px solid var(--line)}
.reveal{border-top:1px solid var(--ink);border-bottom:1px solid var(--line);padding:10px 0}
.reveal summary{cursor:pointer;color:var(--accent);font-weight:600}