:root{
  --paper:#f1ece1;
  --card:#fffdf8;
  --ink:#14140f;
  --text:#1c1b1a;
  --yellow:#f5d949;
  --red:#c0392b;
  --blue:#7588a3;
  --navy:#15161f;
  --line:#d9d2c2;
  --ash:#6f6a5e;
  --green:#5d7e4f;
  --orange:#d9822b;
}
*{margin:0;padding:0;box-sizing:border-box}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--red);outline-offset:2px}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{
  background-color:var(--paper);
  background-image:
    linear-gradient(rgba(20,20,15,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20,20,15,.05) 1px, transparent 1px);
  background-size:28px 28px;
  color:var(--ink);
  font-family:'Space Grotesk',Arial,sans-serif;
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-wrap:break-word;
}
.wrap{max-width:1140px;margin:0 auto;padding:0 28px}
.mono{font-family:'Space Mono',monospace}

/* ── topbar ── */
.topbar{
  border-bottom:2px solid var(--ink);
  position:sticky;top:0;z-index:50;
  background:var(--paper);
}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:60px;gap:20px}
.topbar .brand{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:14px;letter-spacing:.12em;text-transform:uppercase;text-decoration:none;color:inherit}
.topbar nav{display:flex;gap:22px;margin-left:auto;margin-right:auto}
.topbar nav a{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ash);text-decoration:none}
.topbar nav a:hover{color:var(--red)}
.topbar .cta{font-family:'Space Mono',monospace;font-weight:700;font-size:11px;letter-spacing:.08em;text-transform:uppercase;background:var(--yellow);color:var(--ink);border:2px solid var(--ink);padding:9px 16px;text-decoration:none;white-space:nowrap;flex-shrink:0}
.topbar .cta:hover{background:var(--ink);color:var(--yellow)}
.topbar .cta .cta-short{display:none}
@media(max-width:780px){.topbar nav{display:none}}
@media(max-width:359px){.topbar .cta .cta-full{display:none}.topbar .cta .cta-short{display:inline}}

/* ── reading progress indicator ── */
.progress-track{position:fixed;top:62px;left:0;right:0;height:3px;background:transparent;z-index:49;pointer-events:none}
.progress-fill{height:100%;width:100%;background:var(--red);transform:scaleX(0);transform-origin:0 0;transition:transform .1s linear}

/* ── shared type ── */
.kicker{font-family:'Space Mono',monospace;font-size:13px;letter-spacing:.02em;color:var(--red);margin-bottom:22px}
.hl{background:var(--yellow);padding:.04em .12em;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.btn-row{display:flex;gap:14px;flex-wrap:wrap}
.btn{font-family:'Space Mono',monospace;font-weight:700;font-size:12px;letter-spacing:.08em;text-transform:uppercase;padding:15px 26px;text-decoration:none;border:2px solid var(--ink);display:inline-block}
.btn.primary{background:var(--red);color:#fff;border-color:var(--red)}
.btn.primary:hover{background:var(--ink);border-color:var(--ink)}
.btn.outline{background:transparent;color:var(--ink)}
.btn.outline:hover{background:var(--ink);color:var(--paper)}

/* ── hero ── */
.hero{padding:64px 0 56px;border-bottom:2px solid var(--ink)}
.hero h1{font-family:'Archivo Black',sans-serif;font-weight:900;font-size:clamp(40px,9vw,104px);line-height:.98;letter-spacing:-.01em;margin-bottom:24px;text-transform:uppercase}
.hero .sub{font-family:'Space Grotesk',sans-serif;font-weight:400;font-size:clamp(17px,2.1vw,22px);line-height:1.5;max-width:680px;color:var(--text);margin-bottom:18px}
.hero .tagline{font-family:'Space Mono',monospace;font-size:13px;color:var(--blue);margin-bottom:34px}
.hero .meta{margin-top:38px;display:grid;grid-template-columns:repeat(3,1fr);border:2px solid var(--ink);font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ash)}
.hero .meta>div{padding:16px 22px;border-left:1px solid var(--line)}
.hero .meta>div:first-child{border-left:none}
.hero .meta b{color:var(--ink);display:block;font-size:14px;margin-top:6px;font-weight:700;letter-spacing:.02em}
@media(max-width:720px){.hero .meta{grid-template-columns:1fr}.hero .meta>div{border-left:none;border-top:1px solid var(--line);padding:14px 20px}.hero .meta>div:first-child{border-top:none}}

/* ── figure / diagram card ── */
.figure{margin:30px 0 8px;max-width:680px}
.fig-caption{font-family:'Space Grotesk',sans-serif;font-style:italic;font-size:14px;color:var(--ash);margin-top:10px;max-width:680px}

/* ── dedication ── */
.dedication{padding:56px 0;border-bottom:2px solid var(--ink)}
.dedication .kicker{margin-bottom:22px}
.dedication p{font-family:'Space Grotesk',sans-serif;font-style:italic;font-weight:300;font-size:clamp(16px,1.8vw,19px);line-height:1.65;max-width:680px;color:var(--text);margin-bottom:14px}
.dedication p:last-child{margin-bottom:0}

/* ── thesis ── */
.thesis{padding:64px 0;border-bottom:2px solid var(--ink)}
.thesis .kicker{margin-bottom:22px}
.thesis .lead{font-family:'Space Grotesk',sans-serif;font-weight:400;font-size:clamp(23px,3.6vw,36px);line-height:1.32;letter-spacing:-.005em;max-width:920px}
.thesis .lead b{font-weight:700}

/* ── thesis: the loop's four actors ── */
.thesis-grid{display:grid;grid-template-columns:repeat(4,1fr);border:2px solid var(--ink);margin-top:40px;max-width:980px;background:var(--card)}
.thesis-col{padding:24px 22px;border-left:1px solid var(--line)}
.thesis-col:first-child{border-left:none}
.thesis-tag{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:700;color:var(--blue);margin-bottom:12px;display:flex;align-items:center;gap:8px}
.thesis-col p{font-weight:300;font-size:15px;line-height:1.55;color:var(--text)}
.thesis-col.risk{background:var(--red);color:#fff}
.thesis-col.risk .thesis-tag{color:var(--yellow)}
.thesis-col.risk p{color:#ffe2dd}
@media(max-width:880px){
  .thesis-grid{grid-template-columns:1fr 1fr}
  .thesis-col:nth-child(2n+1){border-left:none}
  .thesis-col:nth-child(n+3){border-top:1px solid var(--line)}
}
@media(max-width:560px){
  .thesis-grid{grid-template-columns:1fr}
  .thesis-col{border-left:none}
  .thesis-col:not(:first-child){border-top:1px solid var(--line)}
}

/* ── data floor ── */
.db-browse{padding:22px 0;border-bottom:2px solid var(--ink);background:var(--card)}
.db-browse .wrap{display:flex;flex-direction:column;gap:12px}
.db-browse-label{font-family:'Space Mono',monospace;font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--ash)}
.db-search-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.db-search-input{flex:1 1 320px;max-width:560px;font-family:'Space Mono',monospace;font-size:13px;color:var(--ink);background:var(--card);border:2px solid var(--ink);padding:9px 13px;outline:none}
.db-search-input::placeholder{color:var(--ash)}
.db-search-input:focus{border-color:var(--red)}
.db-search-count{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.04em;color:var(--ash)}
mark.db-search-mark{background:var(--yellow);color:var(--ink);padding:0;border-radius:1px}
.db-alpha-row{display:flex;flex-wrap:wrap;gap:6px}
.db-letter{font-family:'Space Mono',monospace;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;background:none;border:1.5px solid var(--line);color:var(--ink);padding:5px 11px;cursor:pointer;transition:border-color .12s,color .12s}
.db-letter:hover,.db-letter.active{border-color:var(--red);color:var(--red)}
.db-alpha-results{display:flex;flex-wrap:wrap;gap:6px 20px;list-style:none;min-height:28px}
.db-alpha-results li{display:none}
.db-alpha-results li.visible{display:block}
.db-alpha-results li a{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--red);text-decoration:none}
.db-alpha-results li a:hover{text-decoration:underline}
.db-entry{padding:64px 0;border-bottom:2px solid var(--ink)}
.db-entry.db-search-hide{display:none}
.db-entry-head{display:grid;grid-template-columns:64px 1fr;gap:0 24px;padding-bottom:28px;margin-bottom:36px;border-bottom:1px solid var(--line)}
.db-entry-num{font-family:'Space Mono',monospace;font-size:14px;font-weight:700;color:var(--red);border:1.5px solid var(--red);width:44px;height:44px;display:flex;align-items:center;justify-content:center;margin-top:6px}
.db-sci-name{font-family:'Space Grotesk',sans-serif;font-style:italic;font-weight:300;font-size:15px;color:var(--ash);margin-bottom:6px;letter-spacing:.01em}
.db-names{display:flex;flex-wrap:wrap;gap:8px 22px;padding:12px 0 4px;margin-top:6px;border-top:1px solid var(--line)}
.db-name-lang{font-family:'Space Mono',monospace;font-size:9px;letter-spacing:.14em;text-transform:uppercase;color:var(--ash);margin-right:5px}
.db-name-val{font-family:'Space Grotesk',sans-serif;font-size:13px;color:var(--text)}
.db-entry-head h2{font-family:'Archivo Black',sans-serif;font-weight:900;font-size:clamp(28px,5vw,54px);text-transform:uppercase;letter-spacing:-.01em;line-height:1.02}
.db-summary{font-family:'Space Grotesk',sans-serif;font-weight:300;font-size:15px;line-height:1.5;color:var(--text);max-width:620px;margin-top:10px}
.db-sec{margin-bottom:44px;max-width:760px}
.db-sec-label{font-family:'Space Mono',monospace;font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--red);margin-bottom:16px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.db-sec p,.db-sec li{font-family:'Space Grotesk',sans-serif;font-weight:300;font-size:16px;line-height:1.6;color:var(--text)}
.db-sec p{margin-bottom:12px}
.db-sec ul{list-style:none;margin:12px 0}
.db-sec li{padding-left:20px;position:relative;margin-bottom:10px}
.db-sec li::before{content:"–";position:absolute;left:0;color:var(--ash)}
.db-sec li b,.db-sec p b{font-weight:600;color:var(--ink)}
.db-steps{list-style:none;counter-reset:s;margin:16px 0}
.db-steps li{padding-left:42px;position:relative;margin-bottom:16px;font-family:'Space Grotesk',sans-serif;font-weight:300;font-size:16px;line-height:1.55;color:var(--text);counter-increment:s}
.db-steps li::before{content:counter(s);position:absolute;left:0;top:1px;width:26px;height:26px;display:flex;align-items:center;justify-content:center;background:var(--ink);color:#fff;font-family:'Space Mono',monospace;font-size:11px;font-weight:700;border-radius:2px}
.db-steps li b{font-weight:600;color:var(--ink)}
.db-warn{border:2px solid var(--red);background:rgba(192,57,43,.04);padding:22px 26px;margin-top:4px}
.db-warn-head{font-family:'Space Mono',monospace;font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--red);font-weight:700;margin-bottom:16px}
.db-warn ul{list-style:none;margin:0}
.db-warn li{padding-left:22px;position:relative;margin-bottom:12px;font-family:'Space Grotesk',sans-serif;font-weight:300;font-size:15px;line-height:1.5;color:var(--text)}
.db-warn li:last-child{margin-bottom:0}
.db-warn li::before{content:"▸";position:absolute;left:0;color:var(--red);font-size:12px;top:2px}
.db-warn li b{font-weight:600;color:var(--ink)}
@media(max-width:640px){.db-entry-head{grid-template-columns:1fr}.db-entry-num{display:none}}
.scroll-top{position:fixed;bottom:28px;right:24px;width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:var(--paper);border:2px solid var(--ink);color:var(--ink);font-size:18px;cursor:pointer;opacity:0;pointer-events:none;transition:opacity .2s,background .15s,color .15s;z-index:200}
.scroll-top.visible{opacity:1;pointer-events:auto}
.scroll-top:hover{background:var(--ink);color:var(--paper)}

/* ── mission ── */
.mission{padding:64px 0;border-bottom:2px solid var(--ink)}
.mission .kicker{margin-bottom:22px}
.mission h2{font-family:'Archivo Black',sans-serif;font-weight:900;font-size:clamp(28px,5.2vw,56px);line-height:1.05;text-transform:uppercase;letter-spacing:-.01em;margin-bottom:22px}
.mission>.wrap>p{font-family:'Space Grotesk',sans-serif;font-weight:300;font-size:clamp(16px,1.7vw,19px);line-height:1.65;max-width:680px;color:var(--text);margin-bottom:24px}
.mission .separation{max-width:860px;margin-top:36px}
.mission .pull{max-width:860px;margin-top:36px}

/* ── parts ── */
.part{border-bottom:2px solid var(--ink);padding:64px 0}
.part-head{display:flex;align-items:baseline;gap:20px;margin-bottom:44px;border-bottom:1px solid var(--line);padding-bottom:18px}
.part-num{font-family:'Space Mono',monospace;font-size:13px;letter-spacing:.1em;color:var(--red);font-weight:700}
.part-head h2{font-family:'Archivo Black',sans-serif;font-weight:900;font-size:clamp(28px,5vw,52px);line-height:1;letter-spacing:-.01em;text-transform:uppercase}
.chap{display:grid;grid-template-columns:88px 1fr;gap:0 28px;padding:30px 0;border-top:2px solid var(--line)}
.chap:first-of-type{border-top:none}
.chap>div{min-width:0}
.chap .cnum{font-family:'Space Mono',monospace;font-size:12px;color:var(--red);letter-spacing:.08em;padding-top:6px;font-weight:700}
.chap h3{font-family:'Archivo Black',sans-serif;font-weight:900;font-size:clamp(22px,3vw,32px);line-height:1.12;letter-spacing:-.01em;margin-bottom:14px;text-transform:uppercase}
.chap p{font-weight:300;color:var(--text);max-width:680px}
.chap ul{list-style:none;margin-top:16px;max-width:680px}
.chap li{padding-left:20px;position:relative;margin-bottom:10px;font-weight:300;color:var(--text);font-size:17px}
.chap li::before{content:"—";position:absolute;left:0;color:var(--red)}
.chap li b{font-weight:700;color:var(--ink)}
.chap .lead-line{font-family:'Space Grotesk',sans-serif;font-weight:700;font-style:italic;font-size:22px;line-height:1.35;color:var(--red);margin:22px 0;max-width:680px}
.chap h4{font-family:'Archivo Black',sans-serif;font-weight:900;font-size:clamp(19px,2.4vw,25px);line-height:1.25;letter-spacing:-.01em;margin:40px 0 14px;color:var(--ink);text-transform:uppercase}
.chap h5{font-family:'Space Mono',monospace;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--red);margin:28px 0 12px;font-weight:700}
.chap ol.matrix{list-style:none;counter-reset:m;margin:16px 0;max-width:680px}
.chap ol.matrix li{padding-left:38px;position:relative;margin-bottom:14px;font-weight:300;color:var(--text);font-size:17px;counter-increment:m}
.chap ol.matrix li::before{content:counter(m);position:absolute;left:0;top:1px;width:24px;height:24px;display:flex;align-items:center;justify-content:center;background:var(--red);color:#fff;font-family:'Space Mono',monospace;font-size:12px;font-weight:700;border-radius:2px}
.chap ol.matrix li b{font-weight:700;color:var(--ink)}
@media(max-width:560px){.chap{grid-template-columns:1fr}.chap .cnum{padding-top:0;margin-bottom:8px}}

/* ── epistemic separation ── */
.separation{border:2px solid var(--ink);margin:28px 0;max-width:720px;background:var(--card)}
.separation .sep-title{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.18em;text-transform:uppercase;text-align:center;padding:12px;border-bottom:2px solid var(--ink);background:var(--navy);color:#fff}
.sep-grid{display:grid;grid-template-columns:1fr 1px 1fr}
.sep-divider{background:repeating-linear-gradient(var(--line) 0 8px,transparent 8px 16px)}
.sep-col{padding:22px 26px}
.sep-head{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;font-weight:700;margin-bottom:14px;color:var(--red)}
.sep-col:last-child .sep-head{color:var(--blue)}
.sep-col ul{list-style:none}
.sep-col li{padding-left:18px;position:relative;margin-bottom:10px;font-weight:300;font-size:16px;line-height:1.45;color:var(--text)}
.sep-col li::before{content:"•";position:absolute;left:0;color:var(--ash)}
@media(max-width:640px){.sep-grid{grid-template-columns:1fr}.sep-divider{height:1px;background:repeating-linear-gradient(90deg,var(--line) 0 8px,transparent 8px 16px)}}

/* ── flow diagram ── */
.flow{margin:30px 0 8px;max-width:680px}
.flow .node{
  font-family:'Space Mono',monospace;font-size:13px;font-weight:500;
  border:2px solid var(--ink);padding:12px 16px;background:var(--card);
  display:flex;justify-content:space-between;align-items:center;gap:14px;
}
.flow .node .out{color:var(--red);font-size:11px;letter-spacing:.04em}
.flow .arr{height:22px;width:2px;background:var(--ink);margin:0 0 0 22px;position:relative}
.flow .arr::after{content:"▼";position:absolute;bottom:-4px;left:-5px;font-size:10px;color:var(--ink)}
.flow .node.risk{background:var(--red);color:#fff;border-color:var(--red)}
.flow .node.risk .out{color:#ffd9d3}

/* ── titled diagram ── */
.diagram{margin:30px 0 8px;max-width:680px;border:2px solid var(--ink);background:var(--card)}
.diagram .diagram-title{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.16em;text-transform:uppercase;text-align:center;padding:10px;border-bottom:2px solid var(--ink);background:var(--navy);color:var(--yellow)}
.diagram .flow{margin:0;padding:18px;max-width:none}

/* ── bar chart ── */
.diagram .bars{padding:20px;display:flex;flex-direction:column;gap:18px}
.bar-track{border:2px solid var(--ink);background:var(--paper);height:32px}
.bar-fill{height:100%;width:max(var(--pct),64px);background:var(--navy);color:#fff;font-family:'Space Mono',monospace;font-size:12px;font-weight:700;display:flex;align-items:center;padding:0 10px;white-space:nowrap}
.bar-fill.alt{background:var(--red)}
.bar-label{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.04em;color:var(--ash);margin-top:8px}

/* ── converging flow ── */
.converge{margin:30px 0 8px;max-width:680px}
.converge .conv-row{display:grid;grid-template-columns:1fr 1fr;gap:0 12px}
.converge .conv-node{font-family:'Space Mono',monospace;font-size:13px;font-weight:500;border:2px solid var(--ink);padding:12px 16px;background:var(--card);text-align:center}
.converge .conv-arr{height:22px;width:2px;background:var(--ink);margin:0 auto;position:relative}
.converge .conv-arr::after{content:"▼";position:absolute;bottom:-4px;left:-5px;font-size:10px;color:var(--ink)}
.converge .conv-node.main{background:var(--navy);color:#fff;border-color:var(--navy)}
.converge .conv-node.out{background:var(--yellow);color:var(--ink);border-color:var(--ink)}
@media(max-width:560px){.converge .conv-row{grid-template-columns:1fr;gap:8px}}

/* ── branching flow ── */
.flow .branch-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}
.flow .branch-grid.cols-3{grid-template-columns:1fr 1fr 1fr}
.flow .branch-col{display:flex;flex-direction:column}
.flow .branch-col .node{font-size:12px;text-align:left}
.flow .branch-grid.cols-3 .node{flex-direction:column;align-items:flex-start;gap:6px}
@media(max-width:640px){.flow .branch-grid{grid-template-columns:1fr;gap:22px 0}.flow .branch-grid.cols-3{grid-template-columns:1fr}}

/* ── pullquote ── */
.pull{border-left:4px solid var(--blue);padding:8px 0 8px 26px;margin:24px 0;max-width:680px}
.pull p{font-family:'Space Grotesk',sans-serif;font-style:italic;font-weight:400;font-size:19px;line-height:1.45;color:#222}
.pull .pull-label{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.18em;text-transform:uppercase;font-style:normal;color:var(--blue);margin-bottom:8px;display:block}

/* ── compare table ── */
.tbl-wrap{margin:24px 0;overflow-x:auto;border:2px solid var(--ink)}
table{width:100%;border-collapse:collapse;font-size:15px;min-width:560px;background:var(--card)}
th,td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;background:var(--navy);color:var(--paper);font-weight:500}
thead th:nth-child(2){color:#9fb8d6}
thead th:nth-child(3){color:#f0b3aa}
tbody th{font-family:'Space Mono',monospace;font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--ash);font-weight:700;width:170px}
td{font-family:'Space Grotesk',sans-serif;font-weight:300;color:var(--text)}
tr:last-child td,tr:last-child th{border-bottom:none}

/* ── bibliography ── */
.biblio{list-style:none;counter-reset:ref;margin:24px 0;max-width:760px;border-top:1px solid var(--line)}
.biblio li{counter-increment:ref;padding:16px 0 16px 40px;position:relative;border-bottom:1px solid var(--line);font-size:14px;line-height:1.65;color:var(--text);font-weight:300}
.biblio li::before{content:"[" counter(ref) "]";position:absolute;left:0;top:16px;font-family:'Space Mono',monospace;font-size:12px;font-weight:700;color:var(--red)}
.biblio a{color:var(--blue);word-break:break-all}
.biblio .cited{display:inline-block;margin-top:8px;font-family:'Space Mono',monospace;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--ash);border:1.5px solid var(--ash);padding:2px 8px}

/* ── index / table of contents ── */
.index-sec{padding:64px 0;border-bottom:2px solid var(--ink)}
.index-sec h2{font-family:'Archivo Black',sans-serif;font-weight:900;font-size:clamp(30px,6vw,64px);line-height:1;text-transform:uppercase;margin-bottom:10px;letter-spacing:-.01em}
.index-sec .index-dek{font-family:'Space Grotesk',sans-serif;font-weight:300;font-size:18px;color:var(--text);max-width:640px;margin-bottom:36px}
.index-list{border-top:2px solid var(--ink)}
.index-group{padding:28px 0 6px;font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ash)}
.index-group b{color:var(--red);font-weight:700;margin-right:10px}
.index-row{display:block;border-bottom:2px solid var(--ink);color:inherit;text-decoration:none}
a.index-row{display:grid;grid-template-columns:70px 1fr auto;align-items:start;gap:0 24px;padding:26px 0;transition:background .15s ease}
a.index-row:hover{background:var(--card)}
details.index-row>summary{display:grid;grid-template-columns:70px 1fr auto;align-items:start;gap:0 24px;padding:26px 0;cursor:pointer;list-style:none;transition:background .15s ease}
details.index-row>summary::-webkit-details-marker{display:none}
details.index-row>summary:hover{background:var(--card)}
.index-row .idx-num{font-family:'Space Mono',monospace;font-size:13px;font-weight:700;color:var(--red);padding-top:6px}
.index-row h3{font-family:'Archivo Black',sans-serif;font-weight:900;font-size:clamp(19px,2.6vw,26px);line-height:1.2;text-transform:uppercase;display:flex;flex-direction:column;gap:10px;margin-bottom:8px}
.index-row .idx-sub{font-family:'Space Mono',monospace;font-size:12px;color:var(--blue);margin-bottom:8px;letter-spacing:.01em;text-transform:none}
.index-row p{font-weight:300;color:var(--text);max-width:600px;font-size:15px;margin:0}
.index-row .go{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--red);white-space:nowrap;padding-top:8px;transition:transform .2s ease}
a.index-row:hover .go{transform:translateX(4px)}
.index-row .go .arrow{display:inline-block;margin-left:4px;transition:transform .2s ease}
details.index-row[open]>summary .go .arrow{transform:rotate(180deg)}
/* ── outline dropdown body ── */
.index-outline{padding:0 0 32px 94px;max-width:760px}
.index-outline p{font-weight:300;color:var(--text);font-size:15px;line-height:1.6;margin-bottom:14px}
.index-outline p:last-child{margin-bottom:0}

@media(max-width:600px){
  a.index-row,details.index-row>summary{grid-template-columns:1fr}
  a.index-row .go,details.index-row>summary .go{padding-top:0}
  .index-outline{padding-left:0}
}

/* ── chapter page header ── */
.page-head{padding:56px 0 44px;border-bottom:2px solid var(--ink)}
.page-head .crumb{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ash);margin-bottom:22px}
.page-head .crumb a{color:var(--red);text-decoration:none}
.page-head .crumb a:hover{text-decoration:underline}
.page-head .part-tag{font-family:'Space Mono',monospace;font-size:13px;color:var(--red);margin-bottom:18px;display:block}
.page-head h1{font-family:'Archivo Black',sans-serif;font-weight:900;font-size:clamp(34px,7vw,76px);line-height:1.02;text-transform:uppercase;letter-spacing:-.01em}
.page-head .dek{font-family:'Space Grotesk',sans-serif;font-weight:300;font-size:clamp(17px,2vw,21px);line-height:1.5;max-width:760px;color:var(--text);margin-top:18px}

/* ── book navigation ── */
.booknav{border-top:2px solid var(--ink);background:var(--card)}
.booknav .wrap{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;flex-wrap:wrap;padding:28px}
.booknav a{text-decoration:none;color:var(--ink);display:flex;flex-direction:column;gap:6px;max-width:300px}
.booknav small{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--red)}
.booknav span{font-family:'Space Grotesk',sans-serif;font-size:17px;font-weight:700;letter-spacing:-.005em;line-height:1.25}
.booknav .next{text-align:right;align-items:flex-end;margin-left:auto}
.booknav .idx{align-items:center;text-align:center}
.booknav .idx small{color:var(--ash)}
.booknav a:hover span{text-decoration:underline}
@media(max-width:680px){.booknav .wrap{flex-direction:column}.booknav .next{align-items:flex-start;text-align:left;margin-left:0}}
.booknav.single .wrap{justify-content:center}

/* ── chapter jump strip ── */
.jumpnav{display:flex;flex-wrap:wrap;align-items:center;gap:8px;flex-basis:100%;padding-bottom:24px;border-bottom:1px solid var(--line)}
.jumpnav .jump-label{margin-right:4px}
.jumpnav a.jump-item,.jumpnav .current{
  font-family:'Space Mono',monospace;font-size:12px;font-weight:700;letter-spacing:.04em;
  display:inline-block;max-width:none;min-width:30px;text-align:center;
  color:var(--ink);border:1.5px solid var(--ink);padding:6px 10px;text-decoration:none;
}
.jumpnav a.jump-item:hover{background:var(--ink);color:var(--paper)}
.jumpnav .current{background:var(--red);color:#fff;border-color:var(--red)}

/* ── conclusion ── */
.concl{padding:84px 0;background:var(--navy);color:var(--paper)}
.concl .tag{font-family:'Space Mono',monospace;font-size:13px;color:var(--red);margin-bottom:26px}
.concl h2{font-family:'Archivo Black',sans-serif;font-weight:900;font-size:clamp(28px,5.2vw,58px);line-height:1.12;text-transform:uppercase;max-width:880px;margin-bottom:30px;letter-spacing:-.01em}
.concl h2 .hl{color:var(--ink)}
.concl p{font-weight:300;font-size:19px;line-height:1.6;color:#cfc9bd;max-width:720px;margin-bottom:18px}
.concl .line{color:var(--yellow);font-style:italic}
.concl .chap{border-top:1px solid #2a2a35}
.concl .chap p,.concl .chap .lead-line{color:#cfc9bd}
.concl .chap h3,.concl .chap h4{color:var(--paper)}
.concl .chap h5{color:var(--yellow)}
.concl .chap .cnum{color:#8d8878}
.concl .chap li,.concl .chap ol.matrix li{color:#cfc9bd}
.concl .chap li b,.concl .chap ol.matrix li b{color:var(--paper)}
.concl .chap .separation li{color:var(--text)}
.concl .chap .diagram .flow .node{color:var(--ink)}
.concl .chap .diagram .flow .node.risk{color:#fff}
.concl .chap .converge .conv-node{color:var(--ink)}
.concl .chap .converge .conv-node.main{color:#fff}

/* ── footer ── */
footer{border-top:2px solid var(--paper);background:var(--navy);color:#9b97a8;padding:30px 0}
footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.05em;text-transform:uppercase}
footer .disc{max-width:540px;text-transform:none;letter-spacing:0;font-family:'Space Grotesk',sans-serif;font-style:italic;color:#a8a3ba;font-size:13px;line-height:1.7}
footer .disc a{color:var(--yellow);font-style:normal;text-decoration:none}
footer .disc a:hover{text-decoration:underline}

.reveal{transition:opacity .7s ease,transform .7s ease}
.reveal.pre{opacity:0;transform:translateY(14px)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal.pre{opacity:1;transform:none}}
::selection{background:var(--yellow);color:var(--ink)}

/* ── doodles ── */
.dd-icon{display:inline-block;vertical-align:middle;flex-shrink:0;width:1em;height:1em;overflow:visible}
.dd-icon.dd-sm{width:18px;height:18px}
.dd-icon.dd-md{width:30px;height:30px}
.dd-icon.dd-lg{width:46px;height:46px}
.dd-icon.dd-red{color:var(--red)}
.dd-icon.dd-blue{color:var(--blue)}
.dd-icon.dd-yellow{color:var(--yellow)}
.dd-icon.dd-navy{color:var(--navy)}
.dd-icon.dd-green{color:var(--green)}
.dd-icon.dd-orange{color:var(--orange)}
.dd-icon.dd-ash{color:var(--ash)}

.dd-divider{display:block;width:120px;height:14px;margin:18px 0;color:var(--ash)}

/* hand-drawn annotation marks — wrap a phrase in <span class="dd-circle dd-red"> etc. */
.dd-circle,.dd-box{position:relative;white-space:nowrap}
.dd-circle::before,.dd-box::before{content:"";position:absolute;border:2.5px solid var(--dd-color,var(--red));pointer-events:none}
.dd-circle::before{inset:-.28em -.46em -.2em -.46em;border-radius:50% 46% 53% 47%/58% 49% 51% 44%;transform:rotate(-2deg)}
.dd-box::before{inset:-.3em -.5em;border-radius:4px 9px 5px 10px/10px 5px 9px 4px;transform:rotate(-1deg)}
.dd-underline{padding-bottom:calc(.14em + 2px);border-bottom:3px solid var(--dd-color,var(--red));border-radius:0 0 40% 40%/0 0 65% 65%;box-decoration-break:clone;-webkit-box-decoration-break:clone}

.dd-red{--dd-color:var(--red)}
.dd-blue{--dd-color:var(--blue)}
.dd-yellow{--dd-color:var(--yellow)}
.dd-navy{--dd-color:var(--navy)}
.dd-green{--dd-color:var(--green)}
.dd-orange{--dd-color:var(--orange)}
.dd-ash{--dd-color:var(--ash)}

/* hand-drawn flow connectors */
.flow .arr,.converge .conv-arr{
  height:32px;width:38px;margin:2px 0 2px 16px;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 38 32'%3E%3Cpath d='M19 2 C 12 8, 25 11, 18 17 C 11 23, 25 23, 19 28' fill='none' stroke='%23c0392b' stroke-width='2.5' stroke-linecap='round'/%3E%3Cpath d='M10 22 L19 30 L28 21' fill='none' stroke='%23c0392b' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat center;
}
.flow .arr::after,.converge .conv-arr::after{content:none}
.converge .conv-arr{margin:2px auto}

/* subtle hand-drawn wobble on flowchart boxes */
.flow .node,.converge .conv-node{transform:rotate(-.35deg)}
.flow .node:nth-of-type(even),.converge .conv-node:nth-of-type(even){transform:rotate(.35deg)}
.diagram,.pull{transform:rotate(-.25deg)}
.chap ol.matrix li::before{border-radius:3px 7px 4px 8px}