:root {
  --paper: #f4f0e8;
  --paper-deep: #ebe5d9;
  --ink: #141412;
  --muted: #6e6a61;
  --line: #c9c1b4;
  --line-dark: #8f897f;
  --accent: #bb3f24;
  --accent-soft: #e9c5b8;
  --accent-pale: #f2ddd5;
  --sage: #9aa692;
  --shadow: 0 22px 70px rgba(27, 24, 18, 0.09);
  --serif: Georgia, "Times New Roman", Times, serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --content: 700px;
  --wide: 1020px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.68;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.16em; }
a:hover { color: var(--accent); }
button, input { font: inherit; }
button { color: inherit; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -60px;
  z-index: 1000;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 14px;
  font: 700 13px/1 var(--sans);
  transition: top .2s ease;
}
.skip-link:focus { top: 16px; }

.reading-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 999;
  pointer-events: none;
}
.reading-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
  transform-origin: left center;
}

.site-header {
  max-width: 1280px;
  margin: 0 auto;
  padding: 26px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  font-family: var(--sans);
}
.wordmark {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  text-decoration: none;
  font-size: 15px;
  font-weight: 720;
  letter-spacing: .02em;
}
.wordmark-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--ink);
  font: 800 11px/1 var(--sans);
  letter-spacing: .04em;
}
.site-nav { display: flex; gap: 24px; align-items: center; font-size: 13px; }
.site-nav a { text-decoration: none; }
.text-button {
  appearance: none;
  border: 0;
  background: none;
  padding: 0;
  cursor: pointer;
  font: inherit;
}
.text-button:hover { color: var(--accent); }

.article-hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 104px 36px 56px;
}
.eyebrow {
  font: 700 11px/1.2 var(--sans);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
}
.article-hero h1 {
  margin: 24px 0 26px;
  max-width: 940px;
  font-size: clamp(66px, 9vw, 142px);
  line-height: .86;
  letter-spacing: -.067em;
  font-weight: 500;
}
.dek {
  max-width: 850px;
  margin: 0;
  font-size: clamp(24px, 2.5vw, 38px);
  line-height: 1.22;
  letter-spacing: -.025em;
  color: #35322d;
}
.article-meta {
  display: flex;
  gap: 11px;
  margin-top: 34px;
  font: 600 12px/1 var(--sans);
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-system {
  margin: 80px 0 0;
  padding: 34px;
  background: #efe9dd;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.hero-system svg { display: block; width: 100%; height: auto; color: var(--ink); }
.hero-labels text { font: 700 11px var(--sans); letter-spacing: .12em; fill: var(--muted); }
.hypotheses circle { fill: var(--ink); }
.hypotheses circle:nth-child(3n) { fill: var(--accent); }
.flow-lines path, .graduation-arrow {
  fill: none;
  stroke: var(--line-dark);
  stroke-width: 1.5;
  stroke-dasharray: 5 6;
}
.shop-grid rect { fill: var(--paper); stroke: var(--ink); stroke-width: 1.2; }
.shop-grid path, .shop-grid circle { fill: none; stroke: var(--ink); stroke-width: 1.4; }
.shop-grid text { font: 700 10px var(--sans); letter-spacing: .12em; fill: var(--muted); }
.batch-stack rect { fill: var(--ink); }
.batch-stack rect:nth-child(2) { fill: #534f48; }
.batch-stack rect:nth-child(3) { fill: var(--accent); }
.batch-stack text { font: 650 13px var(--sans); fill: var(--paper); }
.plant path { fill: var(--ink); }
.plant path:nth-of-type(2) { fill: var(--paper); }
.plant text { font: 800 11px var(--sans); letter-spacing: .12em; fill: var(--muted); }

figcaption {
  margin-top: 18px;
  font: 500 13px/1.5 var(--sans);
  color: var(--muted);
}

.article-layout {
  max-width: 1140px;
  margin: 70px auto 0;
  padding: 0 36px;
  display: grid;
  grid-template-columns: 190px minmax(0, var(--content));
  gap: 72px;
  justify-content: center;
}
.toc {
  position: sticky;
  top: 40px;
  align-self: start;
  padding-top: 8px;
  font-family: var(--sans);
  font-size: 12px;
  line-height: 1.35;
}
.toc-label {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ink);
  font-weight: 750;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.toc ol { margin: 14px 0 0; padding: 0; list-style: none; }
.toc li { margin: 0; }
.toc a {
  display: block;
  padding: 7px 0;
  text-decoration: none;
  color: var(--muted);
  transition: color .15s ease, transform .15s ease;
}
.toc a:hover, .toc a.active { color: var(--ink); transform: translateX(3px); }
.toc a.active::before { content: "— "; color: var(--accent); }

.article-body { min-width: 0; }
.article-body p { margin: 0 0 1.35em; }
.article-body .lead {
  margin-bottom: 1.2em;
  font-size: 31px;
  line-height: 1.32;
  letter-spacing: -.022em;
}
.article-body sup { font: 700 10px var(--sans); vertical-align: super; }
.article-body sup a { color: var(--accent); text-decoration: none; }

blockquote {
  margin: 68px -110px;
  padding: 0 0 0 42px;
  border-left: 4px solid var(--accent);
  font-size: 40px;
  line-height: 1.2;
  letter-spacing: -.035em;
}
blockquote p { margin: 0 !important; }
.compact-quote { font-size: 34px; }
.spec-quote {
  font-size: 28px;
  line-height: 1.35;
  background: var(--paper-deep);
  border: 0;
  padding: 34px 38px;
  margin-left: -60px;
  margin-right: -60px;
  position: relative;
}
.spec-quote::before {
  content: "SPEC";
  position: absolute;
  top: 12px;
  right: 16px;
  font: 800 10px var(--sans);
  letter-spacing: .14em;
  color: var(--accent);
}

.article-section {
  position: relative;
  padding-top: 100px;
  scroll-margin-top: 20px;
}
.section-number {
  position: absolute;
  left: -82px;
  top: 109px;
  font: 700 11px/1 var(--sans);
  color: var(--accent);
  letter-spacing: .13em;
}
.article-section h2 {
  margin: 0 0 34px;
  font-size: 50px;
  line-height: 1.02;
  letter-spacing: -.045em;
  font-weight: 500;
}
.article-section h3 { font-weight: 600; }

.wide-figure, .timeline-figure, .portfolio-figure, .build-lot-figure, .finance-figure, .drone-ladder, .graph-figure, .graduation-figure {
  width: min(var(--wide), calc(100vw - 72px));
  margin: 68px 0 68px 50%;
  transform: translateX(-50%);
  padding: 34px;
  background: #efe9dd;
  border: 1px solid var(--line);
}
.wide-figure svg, .portfolio-figure svg, .build-lot-figure svg, .finance-figure svg, .graph-figure svg { display: block; width: 100%; height: auto; }
.figure-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.figure-header h3, .timeline-title {
  margin: 0 0 6px;
  font: 700 16px/1.2 var(--sans);
  letter-spacing: -.01em;
}
.figure-header p, .timeline-desc {
  margin: 0;
  max-width: 720px;
  font: 500 13px/1.5 var(--sans);
  color: var(--muted);
}
.figure-badge {
  flex: none;
  padding: 6px 9px;
  border: 1px solid var(--line-dark);
  font: 700 9px/1 var(--sans);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

.wide-figure .axis { fill: none; stroke: var(--ink); stroke-width: 1.5; }
.wide-figure .axis-labels text { font: 700 11px var(--sans); letter-spacing: .13em; fill: var(--muted); }
.zone path { stroke: var(--ink); stroke-width: 1.2; }
.prototype-zone path { fill: #d9d4ca; }
.gap-zone path { fill: var(--accent-soft); }
.factory-zone path { fill: #2a2926; }
.zone text { font: 600 15px var(--sans); fill: var(--ink); }
.factory-zone text { fill: var(--paper); }
.boundary-lines path { stroke: var(--paper); stroke-width: 1; stroke-dasharray: 4 5; opacity: .7; }

.timeline-figure { padding-bottom: 26px; }
.timeline-title { margin-top: 0; }
.timeline-desc { margin-bottom: 32px; }
.timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
  margin: 0;
  padding: 24px 0 0;
  list-style: none;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 6px;
  height: 1px;
  background: var(--line-dark);
}
.timeline li { position: relative; padding-top: 15px; font-family: var(--sans); }
.timeline li::before {
  content: "";
  position: absolute;
  top: -23px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--ink);
}
.timeline li.future::before { background: var(--accent); border-color: var(--accent); }
.timeline .year { display: block; margin-bottom: 10px; font: 800 10px/1 var(--sans); letter-spacing: .13em; color: var(--accent); }
.timeline strong { display: block; min-height: 40px; font: 700 13px/1.3 var(--sans); }
.timeline p { margin: 9px 0 0; font: 500 11px/1.45 var(--sans); color: var(--muted); }

.process-loop {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 10px;
  margin: 52px -70px;
  font-family: var(--sans);
}
.process-loop div {
  min-height: 100px;
  padding: 18px;
  border: 1px solid var(--ink);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--paper-deep);
}
.process-loop div:last-child { background: var(--accent); color: var(--paper); border-color: var(--accent); }
.process-loop span { font: 700 10px var(--sans); letter-spacing: .1em; color: var(--muted); }
.process-loop div:last-child span { color: var(--paper); opacity: .72; }
.process-loop strong { font-size: 13px; line-height: 1.2; }
.process-loop i { font-style: normal; color: var(--accent); }

.portfolio-grid line { stroke: var(--line); }
.portfolio-labels text { font: 700 9px var(--sans); letter-spacing: .09em; fill: var(--muted); }
.portfolio-column text { font: 500 12px var(--sans); fill: var(--muted); }
.portfolio-column .round { font: 800 10px var(--sans); letter-spacing: .12em; fill: var(--ink); }
.portfolio-column .big { font: 500 50px var(--serif); fill: var(--ink); }
.portfolio-column .medium { font: 600 28px var(--serif); fill: var(--ink); }
.portfolio-column circle { fill: var(--line-dark); }
.portfolio-column.selected circle { fill: var(--accent); }
.portfolio-column.selected .big { fill: var(--accent); }
.portfolio-arrows path { stroke: var(--accent); stroke-width: 1.5; }

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin: 56px -70px;
}
.comparison-card {
  min-height: 250px;
  padding: 28px;
  border: 1px solid var(--ink);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.comparison-card.emphasized { background: var(--ink); color: var(--paper); }
.comparison-kicker { font: 800 10px/1.3 var(--sans); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.comparison-card.emphasized .comparison-kicker { color: var(--accent-soft); }
.comparison-card p { margin: 0; font-size: 29px; line-height: 1.22; letter-spacing: -.025em; }

.lot-inputs rect, .lot-outputs rect { fill: var(--paper); stroke: var(--ink); }
.lot-inputs text, .lot-outputs text { font: 600 14px var(--sans); fill: var(--ink); }
.lot-arrows path, .lot-output-arrow, .lot-feedback path { fill: none; stroke: var(--line-dark); stroke-width: 1.6; }
.lot-arrows path, .lot-output-arrow { marker-end: url(#lotArrow); }
.lot-core rect { fill: var(--ink); }
.lot-core text { font: 500 15px var(--sans); fill: var(--paper); }
.lot-core .lot-core-label { font: 800 21px var(--sans); letter-spacing: .08em; fill: var(--accent-soft); }
.lot-outputs .output-head { font: 800 10px var(--sans); letter-spacing: .12em; fill: var(--accent); }
.lot-feedback text { font: 800 10px var(--sans); letter-spacing: .12em; fill: var(--muted); }

.finance-node rect { fill: var(--paper); stroke: var(--ink); stroke-width: 1.3; }
.finance-node.facility rect { fill: var(--ink); }
.finance-node text { font: 500 14px var(--sans); fill: var(--muted); }
.finance-node .node-head { font: 800 13px var(--sans); letter-spacing: .08em; fill: var(--ink); }
.finance-node.facility text { fill: var(--paper); }
.finance-node.facility .node-head { fill: var(--accent-soft); }
.finance-arrows path { fill: none; stroke: var(--accent); stroke-width: 2; }
.finance-arrows path.cross { stroke: var(--line-dark); stroke-dasharray: 5 6; }
.finance-arrows text { font: 800 10px var(--sans); letter-spacing: .1em; fill: var(--muted); }

.instrument-list { margin: 60px 0 10px; border-top: 1px solid var(--line-dark); }
.instrument-list article {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 25px;
  padding: 28px 0 24px;
  border-bottom: 1px solid var(--line);
}
.instrument-number { font: 700 12px var(--sans); color: var(--accent); }
.instrument-list h3 { margin: 0 0 8px; font-size: 23px; line-height: 1.15; }
.instrument-list p { margin: 0; color: #3f3b35; }

.economics-explorer {
  width: min(1100px, calc(100vw - 72px));
  margin: 86px 0 70px 50%;
  transform: translateX(-50%);
  padding: 36px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  box-shadow: var(--shadow);
}
.explorer-header {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  align-items: flex-start;
  padding-bottom: 26px;
  border-bottom: 1px solid #4b4842;
}
.explorer-header h3 { margin: 8px 0 8px; font-size: 31px; line-height: 1.1; }
.explorer-header p { margin: 0; max-width: 680px; font: 500 14px/1.5 var(--sans); color: #bbb5aa; }
.explorer-header .figure-badge { border-color: #716b62; color: #bbb5aa; }
.explorer-grid { display: grid; grid-template-columns: 310px 1fr; gap: 48px; padding-top: 36px; }
.controls label { display: grid; grid-template-columns: 1fr auto; gap: 8px; margin-bottom: 24px; font-family: var(--sans); }
.controls label > span { font-size: 12px; color: #c7c1b6; }
.controls output { font: 700 12px var(--sans); }
.controls input { grid-column: 1 / -1; width: 100%; accent-color: var(--accent); }
.chart-panel svg { width: 100%; height: auto; overflow: visible; }
.chart-panel .chart-axis { stroke: #777168; stroke-width: 1; }
.chart-panel .chart-grid { stroke: #393733; stroke-width: 1; }
.chart-panel .chart-label { fill: #a9a398; font: 10px var(--sans); }
.chart-panel .flex-line { fill: none; stroke: #ddd6c9; stroke-width: 3; }
.chart-panel .tooled-line { fill: none; stroke: var(--accent); stroke-width: 3; }
.chart-panel .marker-line { stroke: #777168; stroke-width: 1; stroke-dasharray: 4 5; }
.chart-panel .selected-point { fill: var(--paper); stroke: var(--ink); stroke-width: 2; }
.chart-panel .tooled-point { fill: var(--accent); stroke: var(--ink); stroke-width: 2; }
.chart-panel .crossover-point { fill: var(--paper); stroke: var(--accent); stroke-width: 3; }
.chart-panel .series-label { font: 700 11px var(--sans); }
.explorer-results { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 12px; background: #4b4842; border: 1px solid #4b4842; }
.explorer-results div { padding: 14px; background: #242320; }
.explorer-results span { display: block; font: 600 9px var(--sans); letter-spacing: .1em; text-transform: uppercase; color: #999388; }
.explorer-results strong { display: block; margin-top: 4px; font: 600 17px var(--sans); }
.recommendation { margin-top: 14px; padding: 16px 18px; border-left: 3px solid var(--accent); background: #242320; font: 500 13px/1.5 var(--sans); color: #d7d0c4; }

.ladder { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.ladder article { min-height: 390px; padding: 24px 20px; border: 1px solid var(--line-dark); display: flex; flex-direction: column; }
.ladder article.ladder-selected { background: var(--accent); color: var(--paper); border-color: var(--accent); }
.ladder-stage { font: 800 10px var(--sans); letter-spacing: .12em; color: var(--muted); }
.ladder-selected .ladder-stage { color: var(--accent-pale); }
.ladder-volume { margin: 24px 0 20px; font: 500 56px/1 var(--serif); letter-spacing: -.04em; }
.ladder h4 { margin: 0 0 16px; font: 700 15px/1.3 var(--sans); }
.ladder p { margin: 0 !important; font: 500 12px/1.55 var(--sans); color: var(--muted); }
.ladder-selected p { color: var(--paper); }
.ladder-process { margin-top: auto; padding-top: 20px; border-top: 1px solid var(--line); font: 700 10px/1.45 var(--sans); text-transform: uppercase; letter-spacing: .07em; }
.ladder-selected .ladder-process { border-color: rgba(255,255,255,.35); }

.graph-links path { fill: none; stroke: var(--line-dark); stroke-width: 1.4; }
.graph-links .feedback-link { stroke: var(--accent); stroke-width: 2; stroke-dasharray: 6 7; }
.graph-node circle, .graph-node rect, .graph-node polygon { fill: var(--paper); stroke: var(--ink); stroke-width: 1.4; }
.graph-node.unit polygon, .graph-node.decision circle { fill: var(--ink); }
.graph-node.test polygon { fill: var(--accent-soft); }
.graph-node text { font: 800 11px var(--sans); letter-spacing: .08em; fill: var(--ink); }
.graph-node.unit text, .graph-node.decision text { fill: var(--paper); }
.feedback-label { font: 800 10px var(--sans); letter-spacing: .13em; fill: var(--accent); }
.question-list { margin: 38px 0; padding: 0; list-style: none; border-top: 1px solid var(--line-dark); }
.question-list li { padding: 15px 0 15px 28px; border-bottom: 1px solid var(--line); position: relative; }
.question-list li::before { content: "?"; position: absolute; left: 0; color: var(--accent); font: 800 13px var(--sans); }

.graduation-track { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; position: relative; }
.graduation-track::before { content: ""; position: absolute; top: 30px; left: 10%; right: 10%; height: 1px; background: var(--line-dark); }
.graduation-stage { position: relative; padding: 0 14px; text-align: center; font-family: var(--sans); }
.graduation-stage span { position: relative; z-index: 1; width: 60px; height: 60px; margin: 0 auto 25px; display: grid; place-items: center; border-radius: 50%; background: var(--paper); border: 1.5px solid var(--ink); font: 700 12px var(--sans); }
.graduation-stage.final span { background: var(--accent); border-color: var(--accent); color: var(--paper); }
.graduation-stage h4 { margin: 0 0 12px; min-height: 42px; font: 700 13px/1.3 var(--sans); }
.graduation-stage p { margin: 0 !important; font: 500 11px/1.5 var(--sans); color: var(--muted); }

.failure-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin: 54px -70px; background: var(--line-dark); border: 1px solid var(--line-dark); }
.failure-grid div { min-height: 190px; padding: 24px; background: var(--paper-deep); }
.failure-grid span { display: block; margin-bottom: 34px; font: 800 10px var(--sans); letter-spacing: .1em; color: var(--accent); }
.failure-grid strong { display: block; margin-bottom: 8px; font: 700 14px/1.3 var(--sans); }
.failure-grid p { margin: 0 !important; font: 500 12px/1.5 var(--sans); color: var(--muted); }

.thesis-section { padding-bottom: 70px; }
.old-new { margin: 52px -70px; border: 1px solid var(--ink); }
.old-new > div { padding: 30px; }
.old-new > div + div { border-top: 1px solid var(--ink); }
.old-new .new-sequence { background: var(--accent); color: var(--paper); }
.old-new-label { margin-bottom: 14px; font: 800 10px var(--sans); text-transform: uppercase; letter-spacing: .13em; color: var(--muted); }
.new-sequence .old-new-label { color: var(--accent-pale); }
.old-new p { margin: 0 !important; font-size: 25px; line-height: 1.35; }
.closing-line { margin: 70px -80px 0 !important; padding: 70px 80px; background: var(--ink); color: var(--paper); font-size: 52px; line-height: 1.05; letter-spacing: -.045em; text-align: center; }

.sources { margin-top: 70px; padding-top: 40px; border-top: 2px solid var(--ink); font-family: var(--sans); }
.sources h2 { margin: 0 0 25px; font-size: 20px; letter-spacing: -.02em; }
.sources ol { margin: 0; padding-left: 22px; }
.sources li { padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 12px; line-height: 1.5; }
.sources li::marker { color: var(--accent); font-weight: 800; }
.sources li a { display: inline-block; margin-left: 8px; font-weight: 700; text-decoration: none; }
.methods-note { margin-top: 24px !important; padding: 18px; background: var(--paper-deep); font-size: 11px; line-height: 1.55; color: var(--muted); }

.site-footer {
  max-width: 1280px;
  margin: 110px auto 0;
  padding: 42px 36px 65px;
  border-top: 1px solid var(--ink);
  display: flex;
  justify-content: space-between;
  gap: 50px;
  font-family: var(--sans);
}
.site-footer p { max-width: 430px; margin: 15px 0 0; font-size: 12px; color: var(--muted); }
.footer-contact { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; font-size: 12px; }
.footer-contact span, .footer-contact small { color: var(--muted); }
.footer-contact a { text-decoration: none; font-weight: 700; }
.footer-wordmark { font-size: 14px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 20px);
  padding: 10px 15px;
  background: var(--ink);
  color: var(--paper);
  opacity: 0;
  pointer-events: none;
  font: 700 12px var(--sans);
  transition: opacity .2s ease, transform .2s ease;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.reveal { opacity: 0; transform: translate(-50%, 18px); transition: opacity .55s ease, transform .55s ease; }
.reveal.is-visible { opacity: 1; transform: translate(-50%, 0); }
.process-loop.reveal, .comparison-grid.reveal, .failure-grid.reveal, .old-new.reveal { transform: translateY(18px); }
.process-loop.reveal.is-visible, .comparison-grid.reveal.is-visible, .failure-grid.reveal.is-visible, .old-new.reveal.is-visible { transform: translateY(0); }

@media (max-width: 1000px) {
  .article-layout { grid-template-columns: minmax(0, var(--content)); }
  .toc { display: none; }
  .section-number { left: 0; top: 76px; }
  .article-section { padding-top: 100px; }
  .article-section h2 { padding-top: 26px; }
  blockquote { margin-left: 0; margin-right: 0; }
  .spec-quote { margin-left: 0; margin-right: 0; }
  .process-loop, .comparison-grid, .failure-grid, .old-new { margin-left: 0; margin-right: 0; }
  .timeline { grid-template-columns: repeat(3, 1fr); row-gap: 50px; }
  .timeline::before { display: none; }
  .timeline li::before { top: -8px; }
  .explorer-grid { grid-template-columns: 1fr; }
  .controls { display: grid; grid-template-columns: 1fr 1fr; gap: 0 30px; }
  .ladder { grid-template-columns: 1fr 1fr; }
  .graduation-track { grid-template-columns: 1fr 1fr; row-gap: 35px; }
  .graduation-track::before { display: none; }
}

@media (max-width: 720px) {
  body { font-size: 17px; }
  .site-header { padding: 18px 20px; }
  .site-nav { gap: 14px; }
  .site-nav a { display: none; }
  .article-hero { padding: 70px 20px 30px; }
  .article-hero h1 { font-size: clamp(58px, 19vw, 90px); }
  .dek { font-size: 23px; }
  .hero-system { margin-top: 50px; padding: 15px; overflow-x: auto; }
  .hero-system svg { min-width: 780px; }
  .article-layout { margin-top: 40px; padding: 0 20px; }
  .article-body .lead { font-size: 26px; }
  .article-section h2 { font-size: 40px; }
  blockquote { padding-left: 24px; font-size: 31px; }
  .wide-figure, .timeline-figure, .portfolio-figure, .build-lot-figure, .finance-figure, .drone-ladder, .graph-figure, .graduation-figure, .economics-explorer {
    width: calc(100vw - 20px);
    padding: 20px;
  }
  .wide-figure, .portfolio-figure, .build-lot-figure, .finance-figure, .graph-figure { overflow-x: auto; }
  .wide-figure svg, .portfolio-figure svg, .build-lot-figure svg, .finance-figure svg, .graph-figure svg { min-width: 780px; }
  .timeline { grid-template-columns: 1fr; }
  .process-loop { grid-template-columns: 1fr; }
  .process-loop i { transform: rotate(90deg); text-align: center; }
  .comparison-grid, .failure-grid { grid-template-columns: 1fr; }
  .controls { grid-template-columns: 1fr; }
  .explorer-header { flex-direction: column; }
  .explorer-results { grid-template-columns: 1fr; }
  .ladder { grid-template-columns: 1fr; }
  .ladder article { min-height: 330px; }
  .graduation-track { grid-template-columns: 1fr; }
  .closing-line { margin-left: -20px !important; margin-right: -20px !important; padding: 55px 24px; font-size: 42px; }
  .site-footer { margin-top: 70px; padding: 34px 20px 50px; flex-direction: column; }
  .footer-contact { align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: translate(-50%, 0); }
  .process-loop.reveal, .comparison-grid.reveal, .failure-grid.reveal, .old-new.reveal { transform: none; }
}

@media print {
  :root { --paper: #fff; --paper-deep: #f2f2f2; --ink: #000; --muted: #444; --line: #bbb; }
  @page { size: A4; margin: 18mm 16mm 20mm; }
  body { font-size: 11pt; line-height: 1.5; background: #fff; }
  .site-header, .reading-progress, .toc, .site-footer, .toast, .economics-explorer, .site-nav { display: none !important; }
  .article-hero { padding: 0 0 12mm; }
  .article-hero h1 { font-size: 58pt; }
  .dek { font-size: 18pt; }
  .hero-system { box-shadow: none; break-inside: avoid; }
  .article-layout { display: block; max-width: none; margin: 0; padding: 0; }
  .article-body { max-width: none; }
  .article-section { padding-top: 14mm; }
  .article-section h2 { font-size: 30pt; }
  .section-number { position: static; margin-bottom: 4mm; }
  blockquote { margin: 10mm 0; font-size: 23pt; }
  .wide-figure, .timeline-figure, .portfolio-figure, .build-lot-figure, .finance-figure, .drone-ladder, .graph-figure, .graduation-figure {
    width: 100%;
    margin: 10mm 0;
    transform: none !important;
    box-shadow: none;
    break-inside: avoid;
  }
  .reveal { opacity: 1; transform: none !important; }
  .timeline { grid-template-columns: repeat(3, 1fr); }
  .ladder { grid-template-columns: repeat(2, 1fr); }
  .failure-grid { margin: 10mm 0; }
  .old-new { margin: 10mm 0; }
  .closing-line { margin: 10mm 0 0 !important; }
  a { text-decoration: none; }
  .sources a::after { content: " (" attr(href) ")"; font-weight: 400; word-break: break-all; }
}