/* Five Steps to Governed AI — web edition, book brand (dark/gold) */
:root{
  --paper:#FBFAF8; --ink:#141A26; --muted:#4A5468; --faint:#8E9AA8;
  --line:#E5E1D8; --card:#F4F2EC; --card2:#141C2C;
  --gold:#C8A96E; --goldtext:#8A6D3B; --bad:#8A3E22;
  --panel:#0E1626; --panel-ink:#EDEAE4; --panel-muted:#9BA6B8; --panel-line:#26314A;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.7 Inter,system-ui,sans-serif;font-weight:400}
a{color:var(--goldtext);text-decoration:none}
a:hover{color:var(--gold)}
a:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
::selection{background:rgba(200,169,110,.3)}
h1,h2,h3{font-family:'DM Sans',Inter,sans-serif;font-weight:500;line-height:1.12;letter-spacing:-.02em;text-wrap:pretty;margin:0;color:var(--ink)}
h1{font-size:clamp(32px,5vw,46px);margin:10px 0 18px}
h2{font-size:clamp(23px,3.2vw,28px);margin:52px 0 14px}
h3{font-size:20px;margin:36px 0 10px}
p{margin:0 0 18px;max-width:66ch;text-wrap:pretty}
.lead{font-family:'DM Sans',Inter,sans-serif;font-size:clamp(19px,2.6vw,22px);line-height:1.5;color:var(--ink);margin:0 0 26px}
.kicker{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.18em;color:var(--goldtext);text-transform:uppercase;margin:0 0 6px}
.muted{color:var(--muted)}
.mono{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.12em;color:var(--faint);text-transform:uppercase}
/* layout */
.layout{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:280px minmax(0,1fr);gap:56px;padding:0 28px}
main{min-width:0}
article{max-width:700px;padding:52px 0 40px}
/* sidebar */
.sidebar{position:sticky;top:0;align-self:start;height:100vh;overflow-y:auto;padding:44px 24px 44px 0;border-right:1px solid var(--line);scrollbar-width:thin}
.nav-brand{display:block;font-family:'DM Sans',Inter,sans-serif;font-size:19px;line-height:1.25;color:var(--ink);margin-bottom:4px}
.nav-brand:hover{color:var(--ink)}
.nav-sub{font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.18em;color:var(--faint);margin:6px 0 26px}
.toc{list-style:none;margin:0;padding:0}
.toc li{margin:0}
.toc a{display:flex;gap:12px;align-items:baseline;padding:7px 10px 7px 0;font-size:13.5px;line-height:1.4;color:var(--muted)}
.toc a:hover{color:var(--ink)}
.toc a[aria-current="page"]{color:var(--ink)}
.toc a[aria-current="page"] .n{color:var(--gold)}
.toc .n{font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.08em;color:var(--faint);min-width:20px;flex:0 0 auto}
.nav-extras{margin-top:26px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px}
.nav-extras a{font-size:13px;color:var(--goldtext)}
/* mobile top bar + CSS-only drawer */
.nav-open{position:absolute;opacity:0;pointer-events:none}
.topbar{display:none}
.scrim{display:none}
@media (max-width:980px){
  .layout{display:block;padding:0 20px}
  article{padding:28px 0 40px}
  .topbar{position:sticky;top:0;z-index:40;display:flex;align-items:center;justify-content:space-between;gap:14px;background:var(--paper);border-bottom:1px solid var(--line);margin:0 -20px;padding:12px 20px}
  .topbar-title{font-family:'DM Sans',Inter,sans-serif;font-size:15px;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .nav-btn{font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.14em;color:var(--ink);border:1px solid var(--line);padding:8px 13px;cursor:pointer;flex:0 0 auto}
  .sidebar{position:fixed;top:0;left:0;bottom:0;z-index:60;width:300px;max-width:85vw;height:auto;background:var(--paper);border-right:1px solid var(--line);padding:28px 22px;transform:translateX(-103%);transition:transform .25s ease}
  .nav-open:checked ~ .layout .sidebar{transform:none}
  .scrim{position:fixed;inset:0;z-index:50;background:rgba(10,14,24,.5);opacity:0;pointer-events:none;transition:opacity .2s;display:block}
  .nav-open:checked ~ .scrim{opacity:1;pointer-events:auto}
}
/* components */
.rule{height:1px;background:var(--line);border:0;margin:44px 0}
.gbar{width:64px;height:2px;background:var(--gold);border:0;margin:20px 0}
.fig{border:1px solid var(--line);background:transparent;padding:26px 26px 22px;margin:36px 0}
.fig-cap{font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.16em;color:var(--faint);text-transform:uppercase;margin:0 0 14px}
.fig h4{font-family:'DM Sans',Inter,sans-serif;font-weight:500;font-size:19px;letter-spacing:-.01em;margin:0 0 16px;line-height:1.3;color:var(--ink)}
.fig p{font-size:14px;line-height:1.6;color:var(--muted)}
table.data{width:100%;border-collapse:collapse;margin:8px 0 6px;font-size:14px;line-height:1.5}
table.data th{font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.14em;color:var(--faint);text-transform:uppercase;text-align:left;font-weight:500;padding:0 14px 10px 0;border-bottom:1px solid var(--line)}
table.data td{padding:11px 14px 11px 0;border-bottom:1px solid var(--line);vertical-align:top;color:var(--ink)}
table.data td b{color:var(--ink);font-weight:500;font-family:'DM Sans',Inter,sans-serif}
table.data td.mono, table.data th.mono{font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:.04em}
table.data td .sub{display:block;font-size:12.5px;color:var(--muted);margin-top:2px}
.num{font-family:'DM Sans',Inter,sans-serif;font-weight:500;color:var(--goldtext);letter-spacing:-.02em}
/* big stat rows */
.stats{margin:30px 0;border-top:1px solid var(--line)}
.stat{padding:20px 0;border-bottom:1px solid var(--line)}
.stat .v{font-family:'DM Sans',Inter,sans-serif;font-weight:500;font-size:clamp(30px,4.5vw,42px);letter-spacing:-.03em;color:var(--goldtext);line-height:1.05;margin-bottom:6px}
.stat .d{font-size:15px;line-height:1.55;max-width:60ch;color:var(--muted)}
/* dark feature block (book dark pages) */
.opener{background:var(--panel);border:0;padding:38px 34px;margin:0 0 44px}
.opener .kicker{color:var(--gold)}
.opener h1{margin:8px 0 16px;color:#FBFAF8}
.opener p{color:var(--panel-muted)}
.opener .gold{font-family:'DM Sans',Inter,sans-serif;font-size:16.5px;line-height:1.45;color:var(--gold);max-width:56ch;margin:14px 0 0}
.dk{background:var(--panel);border:0;color:var(--panel-ink);padding:32px 30px;margin:36px 0}
.dk .kicker{color:var(--gold)}
.dk .gk{color:var(--gold)}
.dk h2,.dk h3{margin-top:0;color:#FBFAF8}
.dk p{color:var(--panel-muted)}
.dk .lead{color:#FBFAF8}
.dk .facts{border-top:1px solid var(--panel-line);margin:18px 0 0}
.dk .facts>div{padding:13px 0;border-bottom:1px solid var(--panel-line)}
.dk .facts .k{font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.14em;color:var(--gold);text-transform:uppercase;margin-bottom:4px}
.dk .facts .t{font-size:14px;line-height:1.55;color:#C9D0DC}
.skipbox{background:#D94F2B;padding:20px 24px;margin:28px 0 0}
.skipbox .k{font-family:'JetBrains Mono',monospace;font-size:9px;letter-spacing:.16em;color:#3A1408;margin-bottom:8px;text-transform:uppercase}
.skipbox .t{font-family:'DM Sans',Inter,sans-serif;font-size:19px;line-height:1.35;color:#1C0A04;font-weight:500}
.goldbox{background:var(--gold);padding:18px 22px}
.goldbox .k{font-family:'JetBrains Mono',monospace;font-size:9px;letter-spacing:.16em;color:#3A2E14;margin-bottom:8px;text-transform:uppercase}
.goldbox .t{font-size:14px;line-height:1.5;color:#241C08}
.inkbox{background:#141A26;border:0;padding:20px 24px;margin:28px 0}
.inkbox .k{font-family:'JetBrains Mono',monospace;font-size:9px;letter-spacing:.14em;color:var(--gold);margin-bottom:9px;text-transform:uppercase}
.inkbox .t{font-family:'DM Sans',Inter,sans-serif;font-size:16.5px;line-height:1.4;color:#FBFAF8}
/* pairs */
.pair{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);margin:26px 0}
.pair>div{background:var(--card);padding:18px 20px}
.pair .k{font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.14em;color:var(--goldtext);text-transform:uppercase;margin-bottom:8px}
.pair p{font-size:14px;line-height:1.6;margin:0;color:var(--ink)}
@media (max-width:560px){.pair{grid-template-columns:1fr}}
/* numbered step list */
ol.steps{list-style:none;margin:24px 0;padding:0;counter-reset:s}
ol.steps li{counter-increment:s;display:grid;grid-template-columns:34px 1fr;gap:14px;padding:13px 0;border-top:1px solid var(--line);font-size:14.5px;line-height:1.6;color:var(--muted)}
ol.steps li::before{content:counter(s,decimal-leading-zero);font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.08em;color:var(--goldtext);padding-top:4px}
ol.steps li strong{font-weight:600;color:var(--ink)}
/* chain */
.chain{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:14px 0}
.chain span{font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.1em;text-transform:uppercase;border:1px solid var(--line);padding:7px 11px;color:var(--ink);white-space:nowrap}
.chain i{color:var(--gold);font-style:normal}
/* timeline (dark) */
.timeline{margin:20px 0;border-top:1px solid var(--panel-line)}
.timeline>div{display:grid;grid-template-columns:86px 92px 1fr;gap:14px;padding:11px 0;border-bottom:1px solid var(--panel-line);font-size:13.5px;line-height:1.5;align-items:baseline}
.timeline .t{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--panel-muted)}
.timeline .s{font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.1em;color:var(--gold)}
.timeline .d{color:var(--panel-ink)}
@media (max-width:560px){.timeline>div{grid-template-columns:70px 1fr}.timeline .d{grid-column:1/-1;padding-left:0}}
/* spec document card */
.doc{border:1px solid var(--line);background:transparent;margin:30px 0}
.doc-head{display:flex;justify-content:space-between;align-items:baseline;gap:10px;padding:14px 22px;border-bottom:1px solid var(--line);background:#141A26}
.doc-head b{font-family:'JetBrains Mono',monospace;font-size:10.5px;letter-spacing:.16em;font-weight:500;color:#FBFAF8}
.doc-head span{font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.12em;color:var(--gold)}
.doc-row{display:grid;grid-template-columns:120px 1fr;gap:16px;padding:14px 22px;border-bottom:1px solid var(--line);font-size:14px;line-height:1.6}
.doc-row:last-child{border-bottom:0}
.doc-row .k{font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.14em;color:var(--faint);text-transform:uppercase;padding-top:3px}
@media (max-width:560px){.doc-row{grid-template-columns:1fr;gap:4px}}
/* chat (spec builder) */
.chat{border:1px solid var(--line);background:transparent;margin:30px 0}
.chat>div{display:grid;grid-template-columns:74px 1fr;gap:14px;padding:13px 20px;border-bottom:1px solid var(--line);font-size:14px;line-height:1.55}
.chat>div:last-child{border-bottom:0}
.chat .who{font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.14em;color:var(--faint);padding-top:3px}
.chat .factory .who{color:var(--goldtext)}
/* use-case block */
.uc{border-top:1px solid var(--ink);padding-top:8px;margin-top:56px}
.uc .stat-inline{display:flex;gap:20px;align-items:baseline;margin:18px 0 6px}
.uc .stat-inline .v{font-family:'DM Sans',Inter,sans-serif;font-weight:500;font-size:38px;letter-spacing:-.03em;color:var(--ink)}
.uc .stat-inline .l{font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.12em;color:var(--goldtext);text-transform:uppercase;line-height:1.6}
.result{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:center;border-top:2px solid var(--gold);background:#F6EFDD;padding:16px 20px;margin:22px 0;font-size:14px}
.result .arrow{color:var(--gold);font-size:18px}
.result .before{color:#96917F}
.result .after{color:#141A26;font-weight:500;font-family:'DM Sans',Inter,sans-serif}
@media (max-width:560px){.result{grid-template-columns:1fr}.result .arrow{display:none}}
/* firm-stack figure */
.firms{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:18px 0}
.firm .fname{font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.14em;color:var(--faint);margin-bottom:8px}
.firm .blocks{display:flex;flex-direction:column;gap:4px}
.firm .b{font-family:'JetBrains Mono',monospace;font-size:8.5px;letter-spacing:.08em;padding:8px 9px;border:1px solid var(--line);color:var(--ink)}
.firm .b.ghost{border-style:dashed;border-color:#C9C3B7;color:#A8A296}
.firm .b.model{background:#141A26;color:#8E9AA8;border-color:#141A26}
@media (max-width:560px){.firms{grid-template-columns:1fr}}
/* in-brief rows */
.brief{display:grid;grid-template-columns:150px 1fr;gap:6px 18px;padding:7px 0}
.brief b{font-family:'DM Sans',Inter,sans-serif;font-weight:500;color:var(--ink);font-size:15px}
.brief span{font-size:13.5px;line-height:1.55;color:var(--muted)}
@media (max-width:560px){.brief{grid-template-columns:1fr;gap:2px}}
.gk{font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.18em;color:var(--goldtext);text-transform:uppercase;margin:26px 0 8px}
/* return tables */
.rtn{border-top:1px solid var(--ink);margin:20px 0}
.rtn>div{display:grid;grid-template-columns:170px 130px 1fr;gap:16px;align-items:baseline;padding:15px 0;border-bottom:1px solid var(--line)}
.rtn .n{font-family:'DM Sans',Inter,sans-serif;font-size:15px;font-weight:500;color:var(--ink);line-height:1.3}
.rtn .v{font-family:'DM Sans',Inter,sans-serif;font-size:23px;font-weight:500;letter-spacing:-.02em;line-height:1;color:var(--bad)}
.rtn .v.ok{color:var(--ink)}
.rtn .d{font-size:13px;line-height:1.5;color:var(--muted)}
@media (max-width:640px){.rtn>div{grid-template-columns:1fr}.rtn .d{margin-top:2px}}
.big95{font-family:'DM Sans',Inter,sans-serif;font-weight:500;font-size:clamp(84px,17vw,150px);line-height:.85;letter-spacing:-.05em;color:var(--gold);margin:10px 0 20px}
/* pattern rows */
.pattern{border-top:1px solid var(--line);padding:20px 0}
.pattern .pk{font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.1em;color:var(--goldtext);margin-right:12px}
.pattern .pt{font-family:'DM Sans',Inter,sans-serif;font-size:19px;font-weight:500;color:var(--ink)}
.pattern p{font-size:14px;line-height:1.6;color:var(--muted);margin:9px 0 0}
/* worksheets */
.ws{background:#141C2C;border:0;border-top:2px solid var(--gold);padding:22px;margin:18px 0 30px}
.ws .k{font-family:'JetBrains Mono',monospace;font-size:9px;letter-spacing:.12em;color:var(--gold);text-transform:uppercase;margin:14px 0 8px}
.ws .k:first-child{margin-top:0}
.ws .line{border-bottom:1px solid #33405A;height:26px;font-size:12px;font-style:italic;color:#55617A;display:flex;align-items:flex-end;padding-bottom:5px;margin-bottom:8px}
/* start cards */
.startcard{padding:20px 22px;margin-bottom:11px}
.startcard .hd{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:9px}
.startcard .nm{font-family:'DM Sans',Inter,sans-serif;font-size:24px;font-weight:500;letter-spacing:-.02em}
.startcard .tm{font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.1em}
.startcard p{font-size:13.5px;line-height:1.55;margin:0;max-width:none}
/* prev / next */
.pn{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:64px;padding-top:26px}
.pn a{display:block;max-width:46%}
.pn .lbl{display:block;font-family:'JetBrains Mono',monospace;font-size:9px;letter-spacing:.16em;color:var(--faint);text-transform:uppercase;margin-bottom:6px}
.pn .t{display:block;font-family:'DM Sans',Inter,sans-serif;font-size:16px;color:var(--ink);line-height:1.35}
.pn a:hover .t{color:var(--gold)}
.pn .next{margin-left:auto;text-align:right}
/* footer */
.foot{margin-top:56px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;font-size:12.5px;color:var(--faint)}