:root {
  --serif: Iowan Old Style, Palatino Linotype, Book Antiqua, Palatino, Georgia, serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --content: 72rem;
  --reading: 45rem;
  --rust: var(--accent-text);
  --teal: #2f6f70;
  --teal-soft: #dfeceb;
  --rust-soft: #f0e2dc;
  --amber-soft: #f3ead4;
  --focus: var(--ink);
}

:root[data-theme="dark"] {
  --teal: #8bc4c3;
  --teal-soft: #193435;
  --rust-soft: #3a2824;
  --amber-soft: #3a3223;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 18px/1.68 var(--serif);
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; }
a { color: var(--ink); text-underline-offset: .18em; text-decoration-thickness: .08em; }
a:hover { text-decoration-thickness: .14em; }
button, input, output { font: inherit; }
button {
  min-height: 44px;
  border: 1px solid var(--control-border);
  border-radius: 3px;
  padding: .62rem .9rem;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  font-family: var(--sans);
  font-size: .82rem;
  font-weight: 700;
}
button.primary, .primary-link {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  text-decoration: none;
}
button:disabled { cursor: not-allowed; opacity: .45; }
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible, [tabindex="0"]:focus-visible, [tabindex="-1"]:focus {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}
[hidden] { display: none !important; }
code {
  font: .87em/1.45 var(--mono);
  overflow-wrap: anywhere;
}
blockquote {
  margin: 1.5rem 0;
  padding: .2rem 0 .2rem 1.25rem;
  border-left: 4px solid var(--accent);
  font-size: 1.28rem;
  line-height: 1.45;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: .6rem;
  left: .6rem;
  transform: translateY(-150%);
  padding: .65rem .9rem;
  background: var(--ink);
  color: var(--paper);
  font: 700 .8rem/1 var(--sans);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  min-height: 66px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1.5rem;
  padding: .75rem clamp(1rem, 3vw, 2.5rem);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(12px);
  font: .77rem/1.2 var(--sans);
}
.site-header a { text-decoration: none; }
.site-header nav { display: flex; align-items: center; gap: 1.4rem; }
.site-header nav a { color: var(--quiet); padding-block: .9rem; }
.site-header nav a[aria-current="page"] { color: var(--ink); font-weight: 800; }
.brand { display: inline-flex; min-height: 44px; align-items: center; gap: .7rem; font-weight: 800; letter-spacing: .03em; }
.brand-mark { width: 18px; height: 18px; border: 2px solid var(--ink); transform: rotate(45deg); box-shadow: inset 5px 5px 0 var(--accent); }
.header-actions { justify-self: end; display: flex; align-items: center; gap: .8rem; }
.site-header .theme-toggle { min-width: 44px; min-height: 44px; }

main { min-height: calc(100vh - 130px); }
.home-page, .case-page, .appendix-page { width: min(100% - 2rem, var(--content)); margin-inline: auto; }
.eyebrow, .record-label, .case-index {
  margin: 0 0 .55rem;
  color: var(--quiet);
  font: 800 .69rem/1.35 var(--sans);
  letter-spacing: .13em;
  text-transform: uppercase;
}
h1, h2, h3, h4 { margin-top: 0; font-family: var(--serif); letter-spacing: -.025em; }
h1 { font-size: clamp(2.8rem, 7vw, 6.7rem); line-height: .94; font-weight: 500; }
h2 { font-size: clamp(2rem, 4.3vw, 3.7rem); line-height: 1.04; font-weight: 500; }
h3 { font-size: clamp(1.25rem, 2vw, 1.65rem); line-height: 1.18; }
p { margin-top: 0; }
.dek { max-width: 42rem; font-size: clamp(1.18rem, 2.1vw, 1.5rem); line-height: 1.48; color: var(--quiet); }
.section-heading { max-width: var(--reading); margin-bottom: 2rem; }
.section-heading > p:last-child { font-size: 1.08rem; color: var(--quiet); }

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(22rem, 1.12fr);
  gap: clamp(2rem, 5vw, 5.5rem);
  align-items: center;
  min-height: calc(100vh - 66px);
  padding: clamp(3rem, 8vw, 8rem) 0;
}
.home-copy { position: relative; z-index: 1; }
.home-copy h1 { max-width: 10ch; }
.home-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.35rem; margin: 2.2rem 0 1.6rem; font: 700 .86rem/1.3 var(--sans); }
.primary-link { display: inline-flex; align-items: center; min-height: 46px; padding: .75rem 1rem; border-radius: 3px; }
.boundary-note { max-width: 38rem; color: var(--quiet); font: .74rem/1.5 var(--sans); }
.editorial-image { margin: 0; }
.editorial-image img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; border: 1px solid var(--line); box-shadow: 0 25px 70px var(--shadow-color); }
.editorial-image figcaption { display: grid; grid-template-columns: auto 1fr; gap: .85rem; padding-top: .72rem; color: var(--quiet); font: .72rem/1.5 var(--sans); }
.editorial-image figcaption span { color: var(--ink); font-weight: 800; }

.briefing { padding: clamp(4rem, 8vw, 8rem) 0; border-top: 1px solid var(--line); }
.briefing-terms { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin: 3rem 0 5rem; border-block: 1px solid var(--line); }
.briefing-terms div { padding: 1.5rem; border-right: 1px solid var(--line); }
.briefing-terms div:last-child { border-right: 0; }
.briefing-terms dt { font: 800 .78rem/1.2 var(--sans); }
.briefing-terms dd { margin: .65rem 0 0; color: var(--quiet); font-size: .95rem; line-height: 1.55; }
.operation-figure { margin: 4rem 0; }
.figure-heading { max-width: 42rem; margin-bottom: 1.2rem; }
.figure-heading > span { color: var(--quiet); font: 700 .68rem/1 var(--sans); text-transform: uppercase; letter-spacing: .12em; }
.operation-strip { display: grid; grid-template-columns: repeat(6, 1fr); gap: 0; list-style: none; padding: 0; border-block: 1px solid var(--line); }
.operation-strip li { position: relative; min-height: 10rem; padding: 1.1rem .85rem 1rem; border-right: 1px solid var(--line); }
.operation-strip li:last-child { border-right: 0; }
.operation-strip li:not(:last-child)::after { content: "→"; position: absolute; right: -.55rem; top: 46%; z-index: 2; padding: .15rem; background: var(--paper); font-family: var(--sans); }
.operation-strip strong, .operation-strip small { display: block; }
.operation-strip strong { margin-top: 2rem; font: 800 .8rem/1.2 var(--sans); }
.operation-strip small { margin-top: .55rem; color: var(--quiet); font: .75rem/1.45 var(--sans); }
.step-number { color: var(--accent-text); font: 700 .7rem/1 var(--mono); }
.operation-figure figcaption, .source-note { color: var(--quiet); font: .74rem/1.55 var(--sans); }
.operation-figure figcaption { max-width: 48rem; margin-top: .8rem; }
.misconception-callout { width: min(100%, 48rem); margin: 5rem auto 0; padding: 2rem 0 2rem 2rem; border-left: 6px solid var(--accent); }
.misconception-callout > p:nth-child(2) { font-size: 1.28rem; line-height: 1.55; }

.truth-badge { display: inline-flex; align-items: center; min-height: 22px; padding: .18rem .42rem; border: 1px solid currentColor; border-radius: 999px; font: 800 .61rem/1 var(--sans); letter-spacing: .08em; text-transform: uppercase; }
.truth-sourced { color: var(--teal); }
.truth-derived { color: var(--accent-text); }
.truth-toy { color: #705b20; }
:root[data-theme="dark"] .truth-toy { color: #e5c875; }
.truth-unresolved { color: var(--quiet); border-style: dashed; }
.truth-static { color: var(--quiet); }
.claim-link { font-family: var(--mono); font-size: .92em; }
.claim-links { display: inline; }

.case-heading, .appendix-heading { max-width: 62rem; padding: clamp(4rem, 9vw, 8rem) 0 3rem; }
.case-heading h1, .appendix-heading h1 { max-width: 12ch; }
.case-meta { display: flex; flex-wrap: wrap; gap: .45rem .85rem; color: var(--quiet); font: .68rem/1.4 var(--sans); }
.case-meta > span:not(.truth-badge) { padding-top: .2rem; }
.case-section, .appendix-page > section { padding: clamp(3.5rem, 7vw, 7rem) 0; border-top: 1px solid var(--line); }
.table-region { max-width: 100%; overflow-x: auto; overscroll-behavior-inline: contain; }
table { width: 100%; border-collapse: collapse; font: .77rem/1.45 var(--sans); }
caption { padding: .6rem 0 1rem; color: var(--quiet); text-align: left; font-weight: 700; }
th, td { padding: .72rem .78rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
thead th { border-top: 2px solid var(--ink); color: var(--quiet); font-size: .68rem; letter-spacing: .05em; text-transform: uppercase; }
tbody th { font-weight: 800; }
.policy-table .visited { background: var(--teal-soft); }
.policy-table .comparison { background: var(--wash); }
.path-proof { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; margin: 2rem 0 1rem; font: 700 .77rem/1.4 var(--sans); }
.path-proof span:not([aria-hidden]) { padding: .55rem .7rem; border: 1px solid var(--line); }
.path-proof .student, .path-proof .visited { border-color: var(--teal); }

.interactive-shell { border: 1px solid var(--line); background: var(--lab-surface); box-shadow: 0 24px 70px var(--shadow-color); }
.interactive-heading { display: flex; justify-content: space-between; gap: 1rem; align-items: flex-start; padding: 1.5rem; border-bottom: 1px solid var(--line); }
.interactive-heading h3 { margin-bottom: 0; }
.diagnostic-form, .claim-form { padding: 1.5rem; }
fieldset { margin: 0; padding: 0; border: 0; }
legend { max-width: 48rem; margin-bottom: 1rem; font: 800 1rem/1.45 var(--sans); }
.diagnostic-form label, .claim-form label { display: grid; grid-template-columns: auto 1fr; gap: .75rem; align-items: start; padding: .95rem; border-top: 1px solid var(--line); cursor: pointer; }
.diagnostic-form label:last-of-type, .claim-form label:last-of-type { border-bottom: 1px solid var(--line); }
.diagnostic-form input, .claim-form input { width: 1.1rem; height: 1.1rem; margin-top: .18rem; accent-color: var(--accent); }
.diagnostic-form strong, .diagnostic-form small { display: block; font-family: var(--sans); }
.diagnostic-form strong { font-size: .83rem; }
.diagnostic-form small { margin-top: .25rem; color: var(--quiet); font-size: .73rem; line-height: 1.4; }
.diagnostic-form > button, .claim-form > button { margin-top: 1rem; }
.diagnostic-ruling, .claim-ruling { margin: 0 1.5rem 1.5rem; padding: 1.35rem; border: 1px solid var(--line); border-left-width: 6px; background: var(--paper); }
.diagnostic-ruling[data-tone="decisive"] { border-left-color: var(--teal); }
.diagnostic-ruling[data-tone="insufficient"] { border-left-color: var(--accent); }
.ruling-label { margin-bottom: .45rem; font: 800 .73rem/1 var(--sans); letter-spacing: .09em; text-transform: uppercase; }
.diagnostic-ruling p:last-of-type, .claim-ruling p:last-child { margin-bottom: .7rem; color: var(--quiet); }

.trace-replay { padding: clamp(1.5rem, 4vw, 3rem); border-block: 1px solid var(--line); background: var(--paper); }
.trace-replay-intro { max-width: 40rem; }
.trace-controls { display: grid; grid-template-columns: auto minmax(12rem, 1fr) auto; align-items: end; gap: .8rem; margin: 2rem 0; }
.trace-controls label { grid-column: 2; grid-row: 1; display: flex; justify-content: space-between; font: 800 .76rem/1 var(--sans); }
.trace-controls input { grid-column: 2; grid-row: 2; width: 100%; accent-color: var(--accent); }
#trace-previous { grid-row: 1 / 3; }
#trace-next { grid-column: 3; grid-row: 1 / 3; }
.trace-layout { display: grid; grid-template-columns: minmax(13rem, .72fr) minmax(0, 1.28fr); gap: 1.5rem; align-items: start; }
.trace-map { max-height: 31rem; overflow-y: auto; list-style: none; margin: 0; padding: 0; border: 1px solid var(--line); }
.trace-map li { border-bottom: 1px solid var(--line); }
.trace-map li:last-child { border-bottom: 0; }
.trace-map button { width: 100%; min-height: 0; display: grid; grid-template-columns: 2.1rem 1fr; gap: .15rem .6rem; padding: .7rem; border: 0; text-align: left; border-radius: 0; font-weight: 400; }
.trace-map button > span { grid-row: 1 / 3; color: var(--quiet); font: .67rem/1.3 var(--mono); }
.trace-map button > strong { font: 800 .71rem/1.2 var(--sans); }
.trace-map button > small { color: var(--quiet); font: .62rem/1.3 var(--mono); overflow-wrap: anywhere; }
.trace-map .is-current button { box-shadow: inset 5px 0 0 var(--accent); background: var(--wash); }
.current-event { min-width: 0; padding: clamp(1.2rem, 3vw, 2rem); border: 1px solid var(--line); background: var(--lab-surface); }
.current-event > p:first-child { display: flex; flex-wrap: wrap; gap: .5rem 1rem; font: 700 .68rem/1.4 var(--sans); }
.current-event > p:first-child span { text-transform: uppercase; letter-spacing: .1em; color: var(--accent-text); }
.current-event h4 { font-size: 1.35rem; font-weight: 500; }
details summary { cursor: pointer; font: 800 .75rem/1.4 var(--sans); }
pre { max-width: 100%; overflow: auto; white-space: pre-wrap; overflow-wrap: anywhere; padding: 1rem; background: var(--paper); border: 1px solid var(--line); font: .68rem/1.55 var(--mono); }
.claim-form { border-top: 1px solid var(--line); }
.claim-ruling[data-correct="true"] { border-left-color: var(--teal); }

.static-case-fallback { padding: 1.5rem; border: 1px solid var(--line); background: var(--lab-surface); }
.fallback-heading { display: flex; flex-wrap: wrap; gap: .75rem 1rem; align-items: center; }
.fallback-heading h3 { margin-bottom: 0; }
.branch-records { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 2rem 0 3rem; }
.branch-records article { padding: 1rem; border-top: 3px solid var(--accent); background: var(--paper); }
.branch-records article:first-child { border-top-color: var(--teal); }
.trace-table { min-width: 62rem; }
.trace-table code { font-size: .8em; }
.no-script-note { padding: 1rem; border: 2px solid var(--accent); font-family: var(--sans); }

.trace-story .editorial-image { display: grid; grid-template-columns: minmax(0, 1fr) minmax(15rem, .45fr); gap: 1.2rem; align-items: end; }
.trace-story .editorial-image figcaption { display: block; padding: 0 0 1rem; }
.trace-story .editorial-image figcaption span { display: block; margin-bottom: .5rem; }
.distinction-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 2rem; background: var(--line); border: 1px solid var(--line); }
.distinction-grid article { padding: 1.3rem; background: var(--paper); }
.distinction-grid span { font: 700 .65rem/1 var(--mono); color: var(--accent-text); }
.distinction-grid h3 { margin: 1.5rem 0 .7rem; font: 800 .78rem/1.2 var(--sans); }
.distinction-grid p { margin: 0; color: var(--quiet); font-size: .87rem; line-height: 1.5; }

.math-display { max-width: 100%; overflow-x: auto; overflow-y: hidden; margin: 1.8rem 0; padding: .9rem .25rem; }
.equation-reading { max-width: 45rem; color: var(--quiet); }
.calculation-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 2.5rem 0; }
.calculation-grid article { min-width: 0; padding: 1.2rem; border: 1px solid var(--line); }
.calculation-grid article.excluded { grid-column: 1 / -1; border-style: dashed; background: var(--wash); }
.calculation-grid h3 { color: var(--accent-text); font-family: var(--mono); }
.calculation-grid table { min-width: 27rem; }
.mean-callout { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(16rem, .8fr); gap: 2rem; align-items: center; margin: 2rem 0; padding: 1.4rem; border-block: 2px solid var(--ink); }
.mean-callout > * { min-width: 0; }
.mean-callout > div { max-width: 100%; overflow-x: auto; overflow-y: hidden; }
.mean-callout p { margin: 0; color: var(--quiet); }

.claim-resolution { max-width: 50rem; margin-inline: auto; }
.claim-resolution blockquote { font-size: clamp(1.6rem, 3vw, 2.4rem); }
.complication-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.complication-grid article { padding: 1.5rem; border: 1px solid var(--line); border-top: 5px solid var(--accent); }
.complication-grid article:nth-child(even) { border-top-style: dashed; border-top-color: var(--teal); }
.complication-grid h3 { text-transform: lowercase; }
.status-word { display: inline-block; padding: .3rem .5rem; background: var(--wash); font: 800 .69rem/1 var(--sans); text-transform: uppercase; letter-spacing: .06em; }
.complication-grid dl { margin-bottom: 0; }
.complication-grid dt { margin-top: 1rem; font: 800 .68rem/1 var(--sans); text-transform: uppercase; letter-spacing: .07em; }
.complication-grid dd { margin: .35rem 0 0; color: var(--quiet); font-size: .9rem; line-height: 1.55; }
.transfer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.transfer-grid article { padding: 1.5rem; background: var(--lab-surface); border: 1px solid var(--line); }
.transfer-grid details { border-top: 1px solid var(--line); padding-top: 1rem; }
.transfer-grid details p { margin-top: 1rem; }
.transfer-close { max-width: 48rem; margin: 3rem auto 0; font-size: 1.22rem; }

.next-route { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 2rem; align-items: center; padding: 2rem 0 5rem; border-top: 1px solid var(--line); font-family: var(--sans); }
.next-route > span { color: var(--quiet); font-size: .7rem; text-transform: uppercase; letter-spacing: .12em; }
.next-route a { display: flex; justify-content: space-between; font-size: 1.15rem; text-decoration: none; }

.appendix-page { max-width: 76rem; }
.appendix-page > section > h2, .appendix-page > section > p, .appendix-page > section > ol, .appendix-page > section > dl { max-width: var(--reading); }
.method-table table { min-width: 78rem; }
.status-ledger { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin: 2rem 0; }
.claim-index { margin: 4rem 0 2rem; }
.claim-index > p { max-width: var(--reading); color: var(--quiet); }
.claim-index details { scroll-margin-top: 7rem; border-top: 1px solid var(--line); }
.claim-index details:last-child { border-bottom: 1px solid var(--line); }
.claim-index summary { display: grid; grid-template-columns: 10.5rem minmax(0, 1fr); gap: 1rem; align-items: baseline; min-height: 44px; padding: .9rem 0; }
.claim-index summary code { color: var(--accent-text); font-weight: 800; }
.claim-index details[open] summary { border-bottom: 1px dashed var(--line); }
.claim-index details dl { display: grid; grid-template-columns: 9rem minmax(0, 1fr); margin: 0; padding: 1rem; background: var(--lab-surface); }
.claim-index details dt, .claim-index details dd { margin: 0; padding: .5rem; border-bottom: 1px solid var(--line); }
.claim-index details dt { font: 800 .7rem/1.4 var(--sans); text-transform: uppercase; letter-spacing: .05em; }
.status-ledger article { padding: 1.25rem; border-top: 3px solid var(--line); background: var(--lab-surface); }
.status-ledger h3 { margin: 1rem 0 .5rem; }
.status-ledger p { color: var(--quiet); font-size: .92rem; }
.source-list { padding-left: 1.25rem; }
.source-list li { margin-bottom: 1rem; }
.disclosure-list { display: grid; grid-template-columns: 10rem minmax(0, 1fr); gap: 0; }
.disclosure-list dt, .disclosure-list dd { margin: 0; padding: .8rem 0; border-top: 1px solid var(--line); }
.disclosure-list dt { font: 800 .75rem/1.5 var(--sans); }
.artifact-links { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 2rem; }
.artifact-links a { padding: .55rem .7rem; border: 1px solid var(--line); font: 700 .72rem/1 var(--mono); }
.limits { max-width: var(--reading); }

.site-footer { display: flex; justify-content: space-between; gap: 1rem; padding: 1.2rem clamp(1rem, 3vw, 2.5rem); border-top: 1px solid var(--line); color: var(--quiet); font: .68rem/1.4 var(--sans); }
.print-cover, .print-trace { display: none; }
.print-edition .home-actions, .print-edition .next-route { display: none; }
.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; border: 0 !important; }

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-header nav { grid-row: 2; grid-column: 1 / -1; justify-content: center; padding-top: .5rem; border-top: 1px solid var(--line); }
  .home-hero { grid-template-columns: 1fr; min-height: 0; }
  .home-copy h1 { max-width: 11ch; }
  .home-hero .editorial-image { width: min(100%, 48rem); }
  .briefing-terms { grid-template-columns: repeat(2, 1fr); }
  .briefing-terms div:nth-child(2) { border-right: 0; }
  .briefing-terms div:nth-child(-n + 2) { border-bottom: 1px solid var(--line); }
  .operation-strip { grid-template-columns: repeat(3, 1fr); }
  .operation-strip li:nth-child(3) { border-right: 0; }
  .operation-strip li:nth-child(-n + 3) { border-bottom: 1px solid var(--line); }
  .operation-strip li:nth-child(3)::after { display: none; }
  .branch-records { grid-template-columns: 1fr; }
  .trace-layout { grid-template-columns: 1fr; }
  .trace-map { display: grid; grid-template-columns: repeat(3, 1fr); max-height: none; }
  .trace-map li { border-right: 1px solid var(--line); }
  .trace-story .editorial-image { grid-template-columns: 1fr; }
  .trace-story .editorial-image figcaption { padding: 0; }
  .distinction-grid { grid-template-columns: repeat(2, 1fr); }
  .mean-callout { grid-template-columns: 1fr; }
}

@media (max-width: 650px) {
  body { font-size: 17px; }
  .site-header { gap: .7rem; padding: .65rem .85rem; }
  .site-header .brand > span:last-child { display: inline; }
  .site-header nav { gap: 1rem; overflow-x: auto; justify-content: flex-start; }
  .header-actions > a { display: none; }
  .home-page, .case-page, .appendix-page { width: min(100% - 1.5rem, var(--content)); }
  .home-hero { gap: 2.2rem; padding-block: 3.5rem; }
  .home-copy h1 { font-size: clamp(3rem, 15vw, 4.8rem); }
  .editorial-image figcaption { grid-template-columns: 1fr; gap: .25rem; }
  .briefing-terms { grid-template-columns: 1fr; }
  .briefing-terms div { border-right: 0; border-bottom: 1px solid var(--line); }
  .briefing-terms div:last-child { border-bottom: 0; }
  .operation-strip { grid-template-columns: 1fr; }
  .operation-strip li { min-height: 0; border-right: 0; border-bottom: 1px solid var(--line); padding-left: 3.4rem; }
  .operation-strip li:last-child { border-bottom: 0; }
  .operation-strip li::after { content: "↓" !important; display: block !important; top: auto !important; right: auto !important; bottom: -.65rem; left: 1.1rem; }
  .operation-strip li:last-child::after { display: none !important; }
  .operation-strip strong { margin-top: .25rem; }
  .step-number { position: absolute; left: 1rem; top: 1.25rem; }
  .misconception-callout { padding-left: 1.1rem; }
  .case-heading, .appendix-heading { padding-top: 3.5rem; }
  .interactive-heading { display: grid; }
  .trace-controls { grid-template-columns: 1fr 1fr; align-items: stretch; }
  .trace-controls label { grid-column: 1 / -1; grid-row: 1; }
  .trace-controls input { grid-column: 1 / -1; grid-row: 2; min-height: 44px; }
  #trace-previous { grid-column: 1; grid-row: 3; }
  #trace-next { grid-column: 2; grid-row: 3; }
  .trace-map { grid-template-columns: 1fr 1fr; }
  .distinction-grid, .calculation-grid, .complication-grid, .transfer-grid, .status-ledger { grid-template-columns: 1fr; }
  .calculation-grid article.excluded { grid-column: auto; }
  .path-proof { display: grid; grid-template-columns: 1fr; }
  .path-proof span[aria-hidden] { transform: rotate(90deg); justify-self: start; margin-left: .8rem; }
  .disclosure-list { grid-template-columns: 1fr; }
  .claim-index summary, .claim-index details dl { grid-template-columns: 1fr; }
  .disclosure-list dt { padding-bottom: .1rem; }
  .disclosure-list dd { padding-top: .25rem; border-top: 0; }
  .site-footer { display: grid; }
}

@media (max-width: 650px) and (max-height: 500px) {
  .site-header { position: static; }
}

@media (max-width: 350px) {
  body { font-size: 16px; }
  .site-header a.brand > span:last-child { display: inline; font-size: .7rem; }
  .trace-map { grid-template-columns: 1fr; }
  .diagnostic-form, .claim-form, .interactive-heading, .trace-replay { padding-inline: 1rem; }
  .diagnostic-ruling, .claim-ruling { margin-inline: 1rem; }
  .current-event { padding: 1rem; }
  .math-display { font-size: .87rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .001ms !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; }
}

@media (forced-colors: active) {
  .brand-mark, .truth-badge, .path-proof span:not([aria-hidden]), .interactive-shell, .current-event, .complication-grid article { forced-color-adjust: auto; }
  .policy-table .visited, .policy-table .comparison, .trace-map .is-current button { background: Canvas; }
  .trace-map .is-current button { outline: 3px solid Highlight; outline-offset: -4px; }
}

@page { size: Letter; margin: .62in; }
@media print {
  html { scroll-behavior: auto; }
  body { font-size: 10.6pt; line-height: 1.46; background: #fff !important; color: #111 !important; }
  .skip-link, .site-header, .site-footer, .next-route, .theme-toggle, .home-actions, .interactive-shell, .no-script-note { display: none !important; }
  .home-page, .case-page, .appendix-page { width: 100%; margin: 0; }
  .print-cover { display: block; min-height: 8.3in; break-after: page; padding-top: 1.2in; }
  .print-cover h1 { font-size: 52pt; }
  .print-cover dl { margin-top: 1in; }
  .print-cover dt { font: 700 8pt/1.2 var(--sans); text-transform: uppercase; }
  .print-cover dd { margin: 0 0 .35in; }
  .home-hero { min-height: 0; grid-template-columns: 1fr; padding: 0 0 .35in; }
  .home-copy h1 { font-size: 38pt; }
  .home-hero .editorial-image { margin-top: .2in; }
  .editorial-image img { max-height: 4.2in; object-fit: cover; box-shadow: none; }
  .briefing, .case-section, .appendix-page > section { padding: .3in 0; }
  .case-heading, .appendix-heading { padding: .35in 0; }
  .case-heading, #DETECTIVE-SEC-03, .trace-story { break-before: page; }
  .appendix-heading, .claim-resolution, .limits { break-inside: avoid; }
  h1 { font-size: 34pt; }
  h2 { font-size: 23pt; }
  h3 { font-size: 14pt; }
  h2, h3, h4 { break-after: avoid-page; }
  p, li, dd { orphans: 3; widows: 3; }
  .briefing-terms { grid-template-columns: repeat(2, 1fr); }
  .operation-strip { grid-template-columns: repeat(3, 1fr); break-inside: avoid; }
  .operation-strip li { min-height: 1.3in; }
  .operation-strip li:nth-child(3) { border-right: 0; }
  .operation-strip li:nth-child(-n + 3) { border-bottom: 1px solid #ccc; }
  .operation-strip li:nth-child(3)::after { display: none; }
  .table-region { overflow: visible; }
  table { font-size: 7.6pt; }
  th, td { padding: 4pt 5pt; }
  .trace-table { min-width: 0; table-layout: fixed; }
  .trace-table th:nth-child(1), .trace-table td:nth-child(1) { width: 5%; }
  .trace-table th:nth-child(2), .trace-table td:nth-child(2) { width: 25%; overflow-wrap: anywhere; }
  .trace-table th:nth-child(3), .trace-table td:nth-child(3) { width: 22%; overflow-wrap: anywhere; }
  .trace-table th:nth-child(4), .trace-table td:nth-child(4) { width: 48%; }
  .branch-records, .complication-grid, .transfer-grid, .status-ledger { grid-template-columns: 1fr 1fr; }
  .branch-records article, .complication-grid article, .transfer-grid article, .calculation-grid article, .status-ledger article { break-inside: avoid; }
  .static-case-fallback { border: 0; padding: 0; background: #fff; }
  .static-case-fallback .trace-table-region { break-before: page; }
  .trace-story .editorial-image { grid-template-columns: 1fr; break-inside: avoid; }
  .trace-story .editorial-image img { max-height: 3.4in; }
  .distinction-grid { grid-template-columns: repeat(4, 1fr); break-inside: avoid; }
  .calculation-grid { grid-template-columns: 1fr 1fr; }
  .calculation-grid article.excluded { grid-column: 1 / -1; }
  .mean-callout { grid-template-columns: 1fr; break-inside: avoid; }
  .math-display { overflow: visible; font-size: 9pt; }
  .method-table table { min-width: 0; table-layout: fixed; font-size: 6.6pt; }
  .method-table th, .method-table td { overflow-wrap: anywhere; }
  details > :not(summary) { display: block !important; }
  details summary { list-style: none; }
  details summary::after { content: " — worked resolution"; font-weight: 400; }
  .claim-index .claim-record { display: block; break-inside: avoid-page; page-break-inside: avoid; border-top: 1px solid var(--line); padding: .08in 0; }
  .claim-index .claim-record > header { display: grid; grid-template-columns: 1.25in minmax(0, 1fr); gap: .12in; align-items: baseline; padding-bottom: .06in; font-size: 8pt; }
  .claim-index .claim-record > header code { color: var(--accent-text); font-weight: 800; }
  .claim-index .claim-record dl { display: grid; grid-template-columns: 1.05in minmax(0, 1fr); margin: 0; padding: .08in; background: var(--lab-surface); font-size: 7.2pt; line-height: 1.32; }
  .claim-index .claim-record dt, .claim-index .claim-record dd { margin: 0; padding: .035in .05in; border-bottom: 1px solid var(--line); }
  .claim-index .claim-record dt { font: 800 7pt/1.3 var(--sans); text-transform: uppercase; letter-spacing: .04em; }
  .transfer-grid article { padding: .16in; }
  .transfer-grid details { padding-top: .08in; }
  .transfer-grid details p { margin-top: .08in; }
  .transfer-close { margin: .18in auto 0; font-size: 10pt; }
  a { color: #111; text-decoration: none; }
  a[href^="http"]::after { content: " (" attr(href) ")"; overflow-wrap: anywhere; font: 6.5pt/1.2 var(--sans); }
  .print-trace { display: block; break-before: page; }
}