:root {
      --paper: #fbfaf6;
      --paper-warm: #f5efe2;
      --ink: #15120e;
      --ink-2: #2b2620;
      --muted: #6b6359;
      --rule: #e8e0d2;
      --accent: #a8327a;
      --accent-wash: rgba(168, 50, 122, .08);
      --serif: "Fraunces", Georgia, serif;
      --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink-2);
      font: 400 15px/1.68 var(--sans);
      letter-spacing: -.005em;
      -webkit-font-smoothing: antialiased;
    }
    a { color: var(--accent); text-decoration: none; border-bottom: 1px solid rgba(168, 50, 122, .32); }
    a:hover, a:focus-visible { border-bottom-color: var(--accent); }
    a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
    .page { max-width: 1500px; padding: 0 56px 92px; margin: 0 auto; }
    .masthead { padding: 34px 0 32px; border-bottom: 1px solid var(--rule); }
    .eyebrow, .slide-label, .section-index, .section-time, .slide-number, .kicker {
      font-family: var(--mono); font-size: 11px; font-weight: 500;
      letter-spacing: .12em; line-height: 1.5; text-transform: uppercase;
    }
    .eyebrow { color: var(--accent); }
    h1, h2, h3, p { margin-top: 0; }
    .masthead h1 { margin: 10px 0 6px; font: 500 clamp(2.25rem, 4vw, 3.7rem)/1.1 var(--serif); letter-spacing: -.035em; color: var(--ink); }
    .deck { margin: 0 0 18px; font-size: 17px; color: var(--muted); }
    .intro { max-width: 780px; margin: 0; color: var(--muted); }
    .intro strong { color: var(--ink-2); font-weight: 600; }
    .jump { display: flex; gap: 8px; flex-wrap: wrap; margin: 27px 0 0; padding: 0; list-style: none; }
    .jump a { display: inline-block; padding: 6px 10px; border: 1px solid var(--rule); border-radius: 2px; color: var(--ink-2); font-size: 12px; }
    .jump a:hover, .jump a:focus-visible { border-color: var(--accent); background: var(--accent-wash); color: var(--accent); }
    .spread { display: grid; grid-template-columns: minmax(0, .91fr) minmax(0, 1fr); gap: clamp(30px, 5vw, 76px); padding: 56px 0 70px; border-bottom: 1px solid var(--rule); scroll-margin-top: 12px; }
    .slide-column { position: sticky; top: 28px; align-self: start; min-width: 0; }
    .slide-meta { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin-bottom: 12px; }
    .slide-label { color: var(--muted); }
    .slide-meta a { flex-shrink: 0; font: 500 11px/1.5 var(--mono); letter-spacing: .04em; }
    figure { margin: 0; }
    .slide-sheet {
      position: relative; display: flex; flex-direction: column; min-width: 0;
      aspect-ratio: 4 / 3; padding: clamp(25px, 5.3cqi, 49px);
      border: 1px solid #e3d8c8; border-left: 5px solid var(--accent);
      background: var(--paper-warm); color: var(--ink);
      container-type: inline-size;
    }
    .slide-sheet h3 { margin: 0 0 1.15em; font: 500 clamp(22px, 5cqi, 34px)/1.16 var(--serif); letter-spacing: -.025em; }
    .slide-sheet ul { margin: 0; padding: 0 0 0 1.35em; font-size: clamp(13px, 1.2vw, 17px); line-height: 1.52; }
    .slide-sheet li { padding-left: .12em; margin: 0 0 .47em; }
    .slide-sheet li::marker { color: var(--accent); }
    .slide-sheet strong { font-weight: 600; }
    .slide-number { position: absolute; right: 7%; bottom: 5%; color: var(--muted); }
    .slide-sheet .kicker { color: var(--accent); }
    .slide-cover { justify-content: center; padding-right: 12%; }
    .slide-cover h3 { max-width: 9ch; margin: .45em 0 .28em; font-size: clamp(36px, 8.6cqi, 66px); line-height: 1.04; }
    .slide-cover .byline { font: 500 clamp(16px, 3cqi, 23px)/1.4 var(--serif); }
    .slide-cover .credits { margin: auto 0 0; padding-top: 1.5em; max-width: 34ch; color: var(--muted); font-size: clamp(9px, 1.65cqi, 11px); line-height: 1.55; }
    .slide-cover .credits p { margin: 0 0 .4em; }
    .slide-outline ul { columns: 2; column-gap: 18px; font-size: clamp(14px, 1.3vw, 19px); line-height: 1.7; }
    .slide-outline li { break-inside: avoid; margin-bottom: .25em; }
    .slide-focus h3 { margin-bottom: .8em; }
    .slide-focus .subhead { margin: .75em 0 .1em; font-size: clamp(14px, 1.25vw, 18px); font-weight: 600; }
    .slide-focus ul { font-size: clamp(12px, 1.05vw, 15px); line-height: 1.45; }
    .slide-focus li { margin-bottom: .32em; }
    .slide-departure { justify-content: center; }
    .slide-departure h3 { margin: 0; font-size: clamp(34px, 7.4cqi, 54px); }
    .slide-departure p { margin: .15em 0 0; color: var(--accent); font: 500 clamp(26px, 5.8cqi, 43px)/1.2 var(--serif); }
    .slide-generalization ul, .slide-expansion ul { font-size: clamp(12.5px, 1.07vw, 16px); line-height: 1.48; }
    .slide-generalization li, .slide-expansion li { margin-bottom: .65em; }
    figcaption { margin-top: 10px; color: var(--muted); font: 11px/1.6 var(--sans); }
    .narrative { min-width: 0; max-width: 700px; }
    .section-heading { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 16px; padding-bottom: 13px; margin-bottom: 24px; border-bottom: 1px solid var(--rule); }
    .section-index { color: var(--accent); }
    .section-time { color: var(--muted); }
    .narrative h2 { margin: 0 0 25px; color: var(--ink); font: 500 clamp(25px, 2.7vw, 36px)/1.18 var(--serif); letter-spacing: -.02em; }
    .narrative p { margin: 0 0 1.2em; font-size: 15.5px; line-height: 1.76; hyphens: auto; }
    .narrative strong { color: var(--ink); font-weight: 600; }
    .narrative em { font-style: italic; }
    .narrative em.tentative { text-decoration: underline dotted; text-underline-offset: .2em; }
    .uncertain { padding: 0 .12em; background: var(--accent-wash); box-decoration-break: clone; -webkit-box-decoration-break: clone; }
    .audience { margin: 1.55em 0 1.55em 14px; padding: 4px 0 1px 16px; border-left: 2px solid var(--accent); }
    .audience p { margin-bottom: .8em; }
    .endnote { color: var(--muted); }
    .review { max-width: 900px; padding: 52px 0 0; }
    .review h2 { margin-bottom: 14px; font: 500 27px/1.2 var(--serif); color: var(--ink); }
    .review p { color: var(--muted); }
    .foot { margin-top: 60px; padding-top: 16px; border-top: 1px solid var(--rule); color: var(--muted); font: 11px/1.7 var(--mono); }
    @media (max-width: 1000px) {
      .page { padding: 0 30px 70px; }
      .spread { gap: 28px; }
      .slide-sheet:not(.slide-cover) { padding-bottom: 60px; }
      .slide-outline ul { columns: 1; }
    }
    @media (max-width: 790px) {
      .page { padding: 0 20px 60px; }
      .spread { grid-template-columns: minmax(0, 1fr); gap: 30px; padding: 40px 0 52px; }
      .slide-column { position: static; width: min(100%, 640px); }
      .slide-sheet { padding: clamp(28px, 6cqi, 45px); }
      .slide-sheet:not(.slide-cover) { padding-bottom: 60px; }
      .slide-outline ul { columns: 2; }
      .narrative { max-width: 680px; }
    }
    @media (max-width: 430px) {
      .masthead { padding-top: 25px; }
      .slide-sheet { padding: 22px; }
      .slide-sheet:not(.slide-cover) { padding-bottom: 60px; }
      .slide-outline ul { columns: 1; }
      .slide-cover .credits { font-size: 9px; }
      .narrative p { font-size: 15px; }
    }
    @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
    @media print {
      body { color: #000; }
      .page { max-width: none; padding: 0; }
      .jump { display: none; }
      .spread { display: block; padding: 24px 0; }
      .slide-column { position: static; max-width: 550px; margin-bottom: 25px; }
      .slide-sheet { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
      .narrative { max-width: none; }
      a { color: inherit; }
    }

    .slide-sheet .subhead { margin: 0 0 .4em; font: 600 clamp(14px, 1.25vw, 18px)/1.3 var(--sans); }
    .slide-sheet .slide-lead { margin: .1em 0 .7em; font-size: clamp(13px, 1.13vw, 16px); line-height: 1.48; }
    .slide-examples ul { font-size: clamp(16px, 1.55vw, 21px); line-height: 1.65; }
    .slide-split { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
    .slide-split h4 { margin: 0 0 .5em; color: var(--accent); font: 600 clamp(15px, 1.25vw, 19px)/1.25 var(--sans); }
    .slide-split ul { font-size: clamp(12px, .99vw, 15px); line-height: 1.44; }
    .slide-split ul ul { margin-top: .5em; }
    .slide-goal { justify-content: center; }
    .slide-goal p { font: 500 clamp(18px, 1.7vw, 26px)/1.47 var(--serif); }
    .slide-human ul { font-size: clamp(13px, 1.1vw, 16px); }
    .slide-human .slide-lead { text-align: center; }
    .slide-comment { justify-content: center; }
    .slide-comment .slide-lead { font-size: clamp(14px, 1.3vw, 18px); }
    .slide-comment .statement { margin: .8em 0; color: var(--accent); text-align: center; font: 500 clamp(19px, 2vw, 27px)/1.4 var(--serif); }
    .slide-impression ul { font-size: clamp(12px, 1.03vw, 15px); line-height: 1.44; }
    .slide-impression ul ul { margin-top: .45em; }
    .slide-history h3 { margin-bottom: .2em; }
    .slide-history .source { margin: 0 0 1.2em; font: 500 clamp(15px, 1.55vw, 21px)/1.3 var(--serif); }
    .slide-history .slide-split ul { font-size: clamp(12px, .96vw, 15px); line-height: 1.4; }
    .slide-history .outcome { margin-top: 1.3em; }
    .slide-history .revision { margin: auto 0 0; padding-top: 1.5em; font-size: 10px; color: var(--muted); }
    .review li { margin-bottom: .65em; }
    @media (max-height: 850px) { .slide-column { position: static; } }
    @media (max-width: 790px) {
      .slide-split { grid-template-columns: 1fr; gap: 16px; }
      .slide-split ul, .slide-history .slide-split ul { font-size: 13px; }
      .slide-sheet .revision { padding-bottom: .5em; }
    }

    .slide-sheet { aspect-ratio: auto; min-height: min(440px, 65vw); }
    .slide-sheet h3 { margin-bottom: .7em; }
    .slide-sheet .subhead { margin: .4em 0 .35em; }
    .slide-sheet .slide-lead { font-size: clamp(13px, 1.1vw, 16px); line-height: 1.5; }
    .slide-sheet .slide-note { font-size: 11px; line-height: 1.4; color: var(--muted); margin: 1em 0 0; }
    .slide-sheet .slide-split { gap: 20px; }
    .slide-sheet .slide-split ul { font-size: clamp(12px, 1vw, 15px); }
    .slide-sheet .slide-split ul ul { font-size: inherit; margin: .5em 0 0; }
    .slide-sheet .slide-split h4 { font-size: clamp(14px, 1.15vw, 17px); }
    .slide-sheet .statement { font: 500 clamp(19px, 2vw, 27px)/1.4 var(--serif); color: var(--accent); }
    .slide-sheet .revision { margin: auto 0 0; padding-top: 18px; color: var(--muted); font-size: 10px; }
    .slide-sheet .slide-list { font-size: clamp(12px, 1vw, 15px); line-height: 1.44; }
    .slide-brief { justify-content: center; }
    .slide-brief .slide-lead { font: 500 clamp(17px, 1.6vw, 23px)/1.48 var(--serif); }
    .slide-brief .statement { margin: .2em 0; }
    .slide-diagram { padding: clamp(18px, 2.7vw, 32px); padding-bottom: 65px; min-height: 0; }
    .slide-diagram h3 { margin: 0 0 .12em; font-size: clamp(20px, 3.8cqi, 30px); }
    .slide-diagram .date { margin: 0 0 12px; font: 500 clamp(12px, 1vw, 15px)/1.4 var(--sans); }
    .diagram-viewport { overflow-x: auto; margin: auto 0; max-width: 100%; }
    .diagram-viewport svg { display:block; width: 100%; height: auto; font: 500 19px/1 var(--sans); }
    .diagram-viewport svg text { fill: var(--ink-2); }
    .diagram-viewport svg text.big { font-size: 24px; font-weight: 600; }
    .diagram-viewport svg text.small { font-size: 15px; }
    .diagram-viewport svg .blue { fill: #315ec4; }
    .diagram-viewport svg .plum { fill: #a8327a; }
    .diagram-viewport svg .blue-text { fill: #24489b; }
    .diagram-viewport svg .plum-text { fill: #8e2366; }
    .diagram-viewport svg .light-text { fill: white; }
    .diagram-viewport svg .water { fill: #6075ae; stroke: #344977; stroke-width: 2; }
    .diagram-viewport svg .move { fill: none; stroke-width: 5; stroke-linecap: round; stroke-linejoin: round; }
    .diagram-viewport svg path.move.blue { stroke: #315ec4; }
    .diagram-viewport svg path.move.plum { stroke: #a8327a; }
    .diagram-viewport svg path.move.dashed { stroke-dasharray: 14 12; }
    .diagram-viewport svg .river { fill: none; stroke: #748aab; stroke-width: 5; }
    .diagram-viewport svg .scale { fill: none; stroke: var(--ink-2); stroke-width: 8; }
    .diagram-viewport svg .army { fill: none; stroke-width: 24; stroke-linecap: round; }
    .diagram-viewport svg .blue-army { stroke: #315ec4; }
    .diagram-viewport svg .plum-army { stroke: #a8327a; }
    .slide-diagram .diagram-legend { margin: .8em 0 0; font: 11px/1.5 var(--sans); color: var(--muted); }
    .slide-dense { min-height: 0; padding-bottom: 85px; }
    .slide-dense h3 { font-size: clamp(20px, 3.8cqi, 28px); }
    .slide-dense .slide-lead, .slide-dense .slide-list,
    .slide-dense .slide-split ul { font-size: clamp(11px, .88vw, 13px); line-height: 1.38; }
    .slide-dense li { margin-bottom: .3em; }
    .slide-dense .slide-split { gap: 15px; }
    .slide-dense .action-text { margin: .6em 0 0; font-size: clamp(11px, .88vw, 13px); line-height: 1.4; }
    .slide-dense .action-text p { margin: 0 0 .55em; }
    .slide-note.callout { border-left: 2px solid var(--accent); padding-left: 10px; }
    @media (max-width: 1100px) {
      .diagram-viewport svg { min-width: 560px; }
      .slide-diagram .diagram-legend::after { content: ' · Pan diagram horizontally for detail.'; }
    }
    @media (max-width: 790px) {
      .slide-sheet { min-height: 0; }
      .slide-sheet .slide-split { grid-template-columns: 1fr; }
      .slide-dense .slide-lead, .slide-dense .slide-list, .slide-dense .slide-split ul, .slide-dense .action-text { font-size: 13px; }
      .slide-diagram { padding-bottom: 75px !important; }
      .slide-dense { padding-bottom: 85px !important; }
    }
    /* Later PDF slides vary greatly in length; allow the re-typeset text to grow. */
    .slide-column { position: static; }
    .slide-sheet { aspect-ratio: auto; min-height: 280px; padding: clamp(20px,3.3cqi,34px); padding-bottom: 74px; }
    .slide-sheet .slide-number { bottom: 17px; right: 24px; }
    .slide-sheet h3 { margin: .3em 0 .7em; font-size: clamp(21px,3.4cqi,32px); }
    .slide-source { margin: 0; max-width: 100%; white-space: pre-wrap; overflow-wrap: anywhere;
                    font: 13px/1.52 var(--sans); }
    .slide-copy { font: 13px/1.53 var(--sans); overflow-wrap: anywhere; }
    .slide-copy h4 { margin: 1em 0 .25em; color: var(--accent); font-size: 13px; }
    .slide-copy h4:first-child { margin-top: 0; }
    .slide-copy p { margin: 0 0 .55em; }
    .slide-copy ul { margin: 0 0 .6em; padding-left: 1.3em; }
    .slide-copy li { margin-bottom: .28em; }
    .diagram-scroll { max-width: 100%; overflow-x: auto; }
    .diagram-scroll svg { display:block; width:100%; min-width:550px; height:auto; }
    .slide-sheet details { margin: 12px 0 0; font-size: 12px; }
    .slide-sheet details summary { cursor:pointer; color:var(--accent); }
    .narrative .tentative { font-style:italic; text-decoration:underline dotted; text-underline-offset:.2em; }
    .narrative .onscreen { color:var(--muted); font-size:13px; }
    @media (max-width: 790px) { .slide-sheet { padding-bottom: 72px !important; } }
    /* Part 8's text is reflowed from the confirmed revised slide; drawings below trace 1986 scans. */
    .slide-part08-text { gap: 0; }
    .slide-part08-text h3 { margin: .2em 0 .65em; }
    .slide-part08-copy { max-width: 72ch; font-size: clamp(13px, 1.1vw, 16px); line-height: 1.55; }
    .slide-part08-copy h4 { margin: 1.25em 0 .35em; padding-top: .65em; border-top: 1px solid var(--rule); color: var(--accent); font-size: 1.04em; line-height: 1.3; }
    .slide-part08-copy h4:first-child { padding-top: 0; border-top: 0; }
    .slide-part08-copy p { margin: 0 0 .72em; }
    .slide-copy-transition { margin: .6em 0 .65em !important; text-align: center; color: var(--muted); font-style: italic; }
    .slide-copy-bullet { position: relative; padding-left: 1.15em; }
    .slide-copy-bullet.depth-1 { margin-left: 1.3em; }
    .slide-copy-bullet.depth-2 { margin-left: 2.6em; }
    .slide-copy-bullet.depth-3 { margin-left: 3.9em; }
    .slide-attribution-line { display: grid; grid-template-columns: minmax(0, 1fr) minmax(8ch, .65fr); gap: .5em; }
    .slide-attribution { color: var(--muted); text-align: right; }
    .slide-part08-diagram { padding-bottom: 82px; }
    .slide-part08-diagram h3 { margin: .15em 0 .35em; }
    .part08-diagram-scroll { width: 100%; overflow: auto; max-height: min(70vh, 540px); background: white; border: 1px solid var(--rule); scrollbar-gutter: stable; }
    .part08-diagram-scroll svg { display: block; width: 100%; min-width: 0; height: auto; }
    .part08-diagram-scroll:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
    .part08-diagram-scroll:focus svg { min-width: 950px; }
    .slide-part08-diagram .slide-note { max-width: 65ch; }
    @media (max-width: 600px) {
      .slide-copy-bullet.depth-2 { margin-left: 1.5em; }
      .slide-copy-bullet.depth-3 { margin-left: 2em; }
    }
    @media print { .part08-diagram-scroll { max-height: none; overflow: visible; } .part08-diagram-scroll svg { min-width: 0; } }

/* Part 05: semantic re-typesettings with the original grouping braces. */
.p05-panel {color:var(--ink);}
.p05-panel h4 {font:600 15px/1.35 var(--sans);margin:1em 0 .7em;text-decoration:underline;text-underline-offset:3px;}
.p05-panel p,.p05-panel blockquote {font-size:15px;line-height:1.55;}
.p05-panel blockquote {margin:1em 0;padding-left:18px;border-left:2px solid var(--accent);}
.p05-pair {display:grid;grid-template-columns:minmax(0,1fr) 24px minmax(0,1fr);gap:5px;align-items:stretch;}
.p05-panel .p05-pair ul {font-size:13px;line-height:1.45;padding-left:1.15em;}
.p05-panel .p05-pair li {margin-bottom:.8em;}
.p05-braces {width:100%;height:100%;min-height:100px;display:block;color:var(--accent);}
.p05-underbrace {display:block;width:85%;height:28px;margin:10px auto 0;color:var(--accent);}
.p05-critique {align-self:center;}
.p05-conclusion {text-align:center;margin:0 auto;max-width:95%;}
.p05-message {border:1px solid var(--ink);padding:16px;margin:0 0 2em;}
.p05-message p,.p05-conclusion p {margin:0;}
.p05-correction {border-bottom:1px dotted var(--accent);}
.p05-panel .p05-note {font-size:11px;line-height:1.5;color:var(--muted);margin:1.5em 0 0;}
@media(max-width:480px){.p05-pair{grid-template-columns:minmax(0,1fr) 18px minmax(0,1fr);gap:2px;}.p05-panel .p05-pair ul{font-size:12px;line-height:1.5;}.p05-panel h4{font-size:13px;}.p05-panel{padding-left:12px;padding-right:12px;}}
@media print{.p05-panel .p05-pair ul{font-size:11px;}.p05-panel p,.p05-panel blockquote{font-size:12px;}}