@layer zpres-theme {
.zpres-theme-paper-chalk {
  --paper-background: #f4f0e6;
  --paper-surface: #fffdf4;
  --paper-ink: #162b4d;
  --paper-pencil: #526783;
  --paper-blue: #1e4f9a;
  --paper-rose: #a4475a;
  --paper-rule: #c9d7e6;
  --paper-wash: color-mix(in srgb, var(--paper-blue) 5%, var(--paper-surface));
  --paper-grid: color-mix(in srgb, var(--paper-rule) 42%, transparent);
  --paper-label-background: color-mix(in srgb, var(--paper-surface) 94%, transparent);
  --paper-evidence-surface: color-mix(in srgb, var(--paper-surface) 96%, var(--paper-background));
  --paper-evidence-mat: color-mix(in srgb, var(--paper-surface) 84%, var(--paper-background));
  --paper-pad: var(--spacing-slide-4);
  --paper-annotation-gap: var(--spacing-slide-4);
  --paper-annotation-stroke: 3px;
  --paper-annotation-shadow: 0 1px 0 color-mix(in srgb, var(--paper-ink) 18%, transparent);
  --paper-depth-1: 4px 5px 0 color-mix(in srgb, var(--paper-blue) 9%, transparent);
  --zpres-data-primary-measure: none;
  --zpres-data-claim-measure: none;
  --zpres-data-claim-inset: var(--spacing-slide-8);
  --zpres-data-dense-measure: none;
  --zpres-data-figure-max-block: 460px;
  color: var(--paper-ink);
  background: var(--paper-background);
  font-family: "Avenir Next", Aptos, "Segoe UI", ui-sans-serif, sans-serif;
}

.zpres-theme-paper-chalk[data-zpres-palette="dark"] .zpres-slide {
  --paper-grid: color-mix(in srgb, var(--paper-rule) 38%, transparent);
  --paper-label-background: color-mix(in srgb, var(--paper-surface) 96%, transparent);
  --paper-evidence-surface: color-mix(in srgb, var(--paper-surface) 92%, var(--paper-background));
  --paper-evidence-mat: color-mix(in srgb, var(--paper-ink) 88%, var(--paper-pencil));
}

/*
 * Semantic annotation vocabulary. These marks are opt-in Source hooks:
 * result-bracket = a stated conclusion; focal-circle = the chart's direct-labelled
 * point; margin-observation = authored text beside Figure evidence; checkpoint =
 * the terminal Derivation stage. No annotation class means no analytical mark.
 */
.zpres-theme-paper-chalk .zpres-slide[class*="zpres-slide-class-annotation-"] {
  --paper-annotation-ink: var(--paper-rose);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-section-index[data-slide-variant="section-title"] .zpres-slide-content {
  grid-template-rows: max-content minmax(0, 1fr) max-content;
  align-content: stretch;
  gap: var(--spacing-slide-8);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-section-index[data-slide-variant="section-title"] .zpres-slide-header {
  align-self: start;
  max-width: 58rem;
  margin-block-start: var(--spacing-slide-12);
  padding-block-end: var(--spacing-slide-4);
  border-block-end: var(--paper-annotation-stroke) double var(--paper-blue);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-section-index[data-slide-variant="section-title"] .zpres-slide-title {
  max-width: 15ch;
  font-size: 4.5rem;
  line-height: 0.9;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-section-index[data-slide-variant="section-title"] .zpres-slide-body {
  justify-self: end;
  align-self: end;
  width: 42rem;
  max-width: 60%;
  margin-block-end: calc(var(--spacing-slide-16) + var(--spacing-slide-4));
  padding-block-start: var(--spacing-slide-4);
  border-inline-start: var(--paper-annotation-stroke) solid var(--paper-rose);
  padding-inline-start: var(--spacing-slide-6);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-section-index[data-slide-variant="section-title"] .zpres-slide-primary {
  gap: var(--spacing-slide-4);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-section-index[data-slide-variant="section-title"] .zpres-block-fit-text p {
  max-width: 16ch;
  font-size: var(--text-slide-heading);
  line-height: var(--text-slide-heading--line-height);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-section-index[data-slide-variant="section-title"] .zpres-block-paragraph {
  font-size: var(--text-slide-body);
  line-height: var(--text-slide-body--line-height);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-claim-short[data-slide-variant="claim"] .zpres-slide-content {
  grid-template-rows: max-content minmax(0, 1fr) max-content;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-claim-short[data-slide-variant="claim"] .zpres-slide-header {
  max-width: 54rem;
  border-block-end: 0;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-claim-short[data-slide-variant="claim"] .zpres-slide-body {
  align-items: center;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-claim-short[data-slide-variant="claim"] .zpres-slide-primary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 18rem;
  align-items: center;
  gap: var(--spacing-slide-12);
  min-height: 25rem;
  padding: var(--spacing-slide-8) var(--spacing-slide-12);
  border: 0;
  background: transparent;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-claim-short[data-slide-variant="claim"] .zpres-block-fit-text p {
  max-width: 13ch;
  font-size: 5rem;
  line-height: 0.92;
  text-decoration-line: underline;
  text-decoration-color: var(--paper-annotation-ink, var(--paper-rose));
  text-decoration-thickness: var(--paper-annotation-stroke);
  text-underline-offset: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-claim-short[data-slide-variant="claim"] .zpres-block-paragraph {
  max-width: 17ch;
  padding-inline-start: var(--spacing-slide-4);
  border-inline-start: 2px solid var(--paper-rule);
  font-size: var(--text-slide-technical);
  line-height: var(--text-slide-technical--line-height);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-resource-claim.zpres-slide-class-paper-claim-short[data-slide-variant="claim"] .zpres-slide-primary {
  grid-template-columns: minmax(0, 1fr) 24rem;
  grid-template-rows: minmax(0, 1fr) max-content;
  gap: var(--spacing-slide-4) var(--spacing-slide-12);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-resource-claim[data-slide-variant="claim"] .zpres-block-fit-text {
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: center;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-resource-claim[data-slide-variant="claim"] .zpres-block-figure {
  grid-column: 2;
  grid-row: 1;
  align-self: end;
  min-height: 0;
  margin: 0;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-resource-claim[data-slide-variant="claim"] .zpres-block-figure img {
  width: 15rem;
  height: 15rem;
  margin-inline: auto;
  background: #fff;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-resource-claim[data-slide-variant="claim"] .zpres-block-figure figcaption {
  color: var(--paper-ink);
  font-size: 14px;
  line-height: 1.15;
  overflow-wrap: normal;
  text-align: center;
  white-space: nowrap;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-resource-claim[data-slide-variant="claim"] .zpres-block-paragraph {
  grid-column: 2;
  grid-row: 2;
  max-width: none;
  margin: 0;
  padding: var(--spacing-slide-2) 0 0;
  border-inline-start: 0;
  border-block-start: 2px solid var(--paper-rule);
  text-align: center;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-annotation-result-bracket[data-slide-variant="claim"] .zpres-slide-primary::after {
  content: "";
  position: absolute;
  inset-block: var(--spacing-slide-6);
  inset-inline-start: var(--spacing-slide-2);
  width: var(--spacing-slide-6);
  border-block: var(--paper-annotation-stroke) solid var(--paper-annotation-ink);
  border-inline-start: var(--paper-annotation-stroke) solid var(--paper-annotation-ink);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-annotation-focal-circle .zpres-chart-direct-annotation-point {
  r: 13px;
  fill: var(--paper-surface);
  stroke: var(--paper-annotation-ink);
  stroke-width: 5px;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-annotation-focal-circle {
  --zpres-data-figure-max-block: 420px;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-annotation-focal-circle .zpres-chart-annotation {
  fill: var(--paper-ink) !important;
  stroke: var(--paper-surface) !important;
  transform: translateX(calc(-1 * var(--paper-annotation-gap)));
  text-decoration-line: underline;
  text-decoration-color: var(--paper-annotation-ink);
  text-decoration-thickness: var(--paper-annotation-stroke);
  text-underline-offset: 5px;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-annotation-margin-observation[data-slide-variant="figure"] .zpres-slide-primary {
  grid-template-columns: minmax(0, 1fr) 17rem;
  grid-template-rows: minmax(0, 1fr);
  align-items: center;
  gap: var(--spacing-slide-8);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-annotation-margin-observation .zpres-block-figure {
  grid-column: 1;
  min-width: 0;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-annotation-margin-observation .zpres-block-quote {
  position: relative;
  grid-column: 2;
  align-self: center;
  margin: 0;
  padding: var(--spacing-slide-4);
  border: 0;
  border-block: var(--paper-annotation-stroke) solid var(--paper-annotation-ink);
  background: var(--paper-label-background);
  box-shadow: var(--paper-annotation-shadow);
  font-size: var(--text-slide-technical);
  font-style: italic;
  line-height: var(--text-slide-technical--line-height);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-annotation-margin-observation .zpres-block-quote::before {
  content: "";
  position: absolute;
  inset-inline-end: 100%;
  inset-block-start: 50%;
  width: var(--spacing-slide-4);
  border-block-start: var(--paper-annotation-stroke) solid var(--paper-annotation-ink);
  transform: translateY(-50%) rotate(-8deg);
  transform-origin: right center;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-annotation-margin-observation .zpres-block-quote::after {
  content: "";
  position: absolute;
  inset-inline-end: calc(100% + var(--spacing-slide-4) - 2px);
  inset-block-start: calc(50% - var(--spacing-slide-2));
  width: 0;
  height: 0;
  border-block: var(--spacing-slide-2) solid transparent;
  border-inline-end: var(--spacing-slide-2) solid var(--paper-annotation-ink);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-annotation-checkpoint .zpres-layout-region[data-derivation-role="stage"]:last-child {
  position: relative;
  border-color: var(--paper-annotation-ink);
  border-inline-end-width: 7px;
  box-shadow: inset 0 -3px 0 var(--paper-annotation-ink);
}

.zpres-theme-paper-chalk .zpres-step[data-step-state="active"] {
  border-inline-start-color: var(--paper-blue);
}

.zpres-theme-paper-chalk .zpres-diagram-surface,
.zpres-theme-paper-chalk .zpres-diagram-node rect,
.zpres-theme-paper-chalk .zpres-diagram-edge {
  stroke: var(--paper-blue);
}

.zpres-theme-paper-chalk .zpres-diagram-arrow {
  fill: var(--paper-blue);
}

.zpres-theme-paper-chalk .zpres-slide-frame {
  position: relative;
  color: var(--paper-ink);
  background:
    linear-gradient(90deg, transparent 47px, color-mix(in srgb, var(--paper-rose) 72%, transparent) 47px 49px, transparent 49px),
    repeating-linear-gradient(0deg, transparent 0 31px, var(--paper-grid) 31px 32px),
    linear-gradient(90deg, transparent 0 107px, color-mix(in srgb, var(--paper-rule) 25%, transparent) 107px 108px),
    var(--paper-surface);
  background-size: auto, auto, 108px 100%, auto;
  box-shadow: 0 18px 50px rgb(17 32 25 / 0.16), inset 0 0 0 1px var(--paper-rule);
}

.zpres-theme-paper-chalk .zpres-slide-frame::before {
  content: "";
  position: absolute;
  z-index: 1;
  inset-inline-start: 22px;
  inset-block: 18% 18%;
  width: 18px;
  pointer-events: none;
  background:
    radial-gradient(circle, var(--paper-background) 0 6px, color-mix(in srgb, var(--paper-pencil) 36%, transparent) 6px 7px, transparent 7px) center top / 18px 18px no-repeat,
    radial-gradient(circle, var(--paper-background) 0 6px, color-mix(in srgb, var(--paper-pencil) 36%, transparent) 6px 7px, transparent 7px) center / 18px 18px no-repeat,
    radial-gradient(circle, var(--paper-background) 0 6px, color-mix(in srgb, var(--paper-pencil) 36%, transparent) 6px 7px, transparent 7px) center bottom / 18px 18px no-repeat;
}

.zpres-theme-paper-chalk .zpres-slide-frame::after {
  content: "FIELD NOTE";
  position: absolute;
  z-index: 2;
  inset-block-start: 24px;
  inset-inline-end: 32px;
  padding: 4px 8px 3px;
  color: var(--paper-pencil);
  border: 1px solid var(--paper-rule);
  background: var(--paper-label-background);
  font-family: "SFMono-Regular", Menlo, Consolas, ui-monospace, monospace;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1;
  transform: rotate(-1.2deg);
}

.zpres-theme-paper-chalk .zpres-slide-header {
  padding-block-end: var(--paper-pad);
  border-block-end: 2px solid var(--paper-rule);
}

.zpres-theme-paper-chalk .zpres-slide-title {
  max-width: 27ch;
  color: var(--paper-ink);
  font-family: "Avenir Next Condensed", "Arial Narrow", "Aptos Display", ui-sans-serif, sans-serif;
  font-size: 2.85rem;
  font-stretch: condensed;
  font-weight: 760;
  letter-spacing: 0.01em;
  line-height: 0.98;
  text-wrap: balance;
}

.zpres-theme-paper-chalk :where(.zpres-slide-body, .zpres-slide-primary) {
  color: var(--paper-ink);
  font-family: "Avenir Next", Aptos, "Segoe UI", ui-sans-serif, sans-serif;
}

.zpres-theme-paper-chalk :where(.zpres-block-code, .zpres-block-math, .zpres-block-table, .zpres-layout-region-title),
.zpres-theme-paper-chalk :where(figcaption, .zpres-slide-sources, .zpres-slide-footer) {
  font-family: "SFMono-Regular", Menlo, Consolas, ui-monospace, monospace;
}

.zpres-theme-paper-chalk :where(.zpres-slide-sources, .zpres-slide-footer) {
  color: var(--paper-pencil);
  border-color: var(--paper-rule);
}

.zpres-theme-paper-chalk .zpres-slide-footer-number {
  margin-left: 8px;
  margin-inline-start: 8px;
  color: var(--paper-rose);
  font-weight: 800;
}

/*
 * Reserve one stable navigation mark on every Slide. A Main slide reveals the
 * down arrow only when its Section contains Detail material, so the footer
 * never shifts as the audience moves between Sections.
 */
.zpres-theme-paper-chalk .zpres-slide-footer::before {
  content: "\2193";
  display: block;
  flex: none;
  width: 1.5rem;
  margin-inline-start: auto;
  color: var(--paper-rose);
  font-family: "SFMono-Regular", Menlo, Consolas, ui-monospace, monospace;
  font-size: var(--text-slide-body);
  font-weight: 800;
  line-height: 1;
  opacity: 0;
  pointer-events: none;
  text-align: center;
}

.zpres-theme-paper-chalk .zpres-section-stack:has(> .zpres-slide[data-slide-role="detail"]) > .zpres-slide[data-slide-role="main"] .zpres-slide-footer::before {
  opacity: 1;
}

.zpres-theme-paper-chalk .zpres-print-slide .zpres-slide-footer::before {
  opacity: 0;
}

.zpres-theme-paper-chalk .debug-diagnostics {
  display: none !important;
}

.zpres-theme-paper-chalk .zpres-block-code pre {
  width: 100%;
  min-width: 0;
  padding-inline-start: var(--spacing-slide-6);
  box-sizing: border-box;
  color: var(--paper-ink);
  border: 1px solid var(--paper-rule);
  background: color-mix(in srgb, var(--paper-surface) 88%, var(--paper-background));
  box-shadow: inset 5px 0 0 var(--paper-blue);
}

.zpres-theme-paper-chalk .zpres-block-math {
  border-color: color-mix(in srgb, var(--paper-blue) 42%, var(--paper-rule));
  border-radius: 1px;
  background: var(--paper-wash);
  box-shadow: inset 0 -3px 0 color-mix(in srgb, var(--paper-blue) 42%, transparent);
}

.zpres-theme-paper-chalk .zpres-block-table {
  border-radius: 1px;
  background: color-mix(in srgb, var(--paper-surface) 88%, transparent);
}

.zpres-theme-paper-chalk .zpres-block-table thead th {
  color: var(--paper-ink);
  border-color: var(--paper-blue);
  font-size: var(--text-slide-technical);
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.zpres-theme-paper-chalk .zpres-block-table tbody tr:nth-child(even):not(:has(strong)) {
  background: color-mix(in srgb, var(--paper-rule) 24%, transparent);
}

/* Let an authored reference table sit directly on the ruled notebook page. */
.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-table-on-page .zpres-block-table {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-table-on-page .zpres-block-table tbody tr {
  background: transparent;
  box-shadow: none;
}

.zpres-theme-paper-chalk :where(.zpres-block-figure img, .zpres-chart-svg, .zpres-diagram-svg, .zpres-gallery-item img, .zpres-block-media :where(img, video)) {
  border: 1px solid var(--paper-rule);
  border-radius: 2px;
  background: var(--paper-evidence-surface);
  box-shadow: var(--paper-depth-1);
}

.zpres-theme-paper-chalk .zpres-chart-svg rect[fill="#ffffff"] {
  fill: var(--paper-evidence-surface);
}

.zpres-theme-paper-chalk .zpres-chart-svg :where(.zpres-chart-axis-label, .zpres-chart-legend, .zpres-chart-annotation) {
  fill: var(--paper-ink);
}

.zpres-theme-paper-chalk .zpres-chart-svg line[stroke="#475569"] {
  stroke: var(--paper-pencil);
}

.zpres-theme-paper-chalk .zpres-chart-svg line[stroke="#e2e8f0"] {
  stroke: var(--paper-rule);
}

.zpres-theme-paper-chalk .zpres-chart-svg circle[stroke="#ffffff"]:not(.zpres-chart-direct-annotation-point) {
  stroke: var(--paper-evidence-surface);
}

.zpres-theme-paper-chalk .zpres-chart-svg .zpres-chart-annotation {
  stroke: var(--paper-evidence-surface) !important;
}

.zpres-theme-paper-chalk[data-zpres-palette="dark"] .zpres-slide :where(.zpres-block-figure img, .zpres-gallery-item img, .zpres-block-media :where(img, video)) {
  background: var(--paper-evidence-mat);
}

/*
 * Keep vector evidence on its authored paint path. Chromium can rescale a
 * filtered external SVG compositor layer inside an autoscaled Slide, which
 * makes labels smaller than their Light peer and prevents reliable semantic
 * text recapture. Raster images and video retain the night-field toning below.
 */
.zpres-theme-paper-chalk .zpres-slide :where(.zpres-block-figure img[src$=".svg" i], .zpres-gallery-item img[src$=".svg" i], .zpres-block-media img[src$=".svg" i]) {
  filter: none;
}

.zpres-theme-paper-chalk[data-zpres-palette="dark"] .zpres-slide :where(.zpres-block-figure img:not([src$=".svg" i]), .zpres-gallery-item img:not([src$=".svg" i]), .zpres-block-media :where(img:not([src$=".svg" i]), video)) {
  filter:
    brightness(calc(var(--zpres-figure-brightness, 1) * 0.78))
    grayscale(var(--zpres-figure-gray, 0))
    saturate(calc(var(--zpres-figure-saturate, 1) * 0.88))
    contrast(1.08)
    blur(var(--zpres-figure-blur, 0px));
}

.zpres-theme-paper-chalk[data-zpres-palette="dark"] .zpres-slide.zpres-slide-class-paper-evidence-canvas .zpres-block-figure img[src$="paper-chalk-search-tree.svg"] {
  background: var(--paper-evidence-surface);
  filter: none;
}

.zpres-theme-paper-chalk[data-zpres-palette="dark"] .zpres-chart-svg [data-chart-series-index] {
  --paper-chart-series: var(--paper-blue);
}

.zpres-theme-paper-chalk[data-zpres-palette="dark"] .zpres-chart-svg [data-chart-series-index="1"] {
  --paper-chart-series: var(--paper-rose);
}

.zpres-theme-paper-chalk[data-zpres-palette="dark"] .zpres-chart-svg [data-chart-series-index="2"] {
  --paper-chart-series: color-mix(in srgb, var(--paper-blue) 58%, var(--paper-ink));
}

.zpres-theme-paper-chalk[data-zpres-palette="dark"] .zpres-chart-svg [data-chart-series-index="3"] {
  --paper-chart-series: color-mix(in srgb, var(--paper-rose) 60%, var(--paper-ink));
}

.zpres-theme-paper-chalk[data-zpres-palette="dark"] .zpres-chart-svg [data-chart-series-index="4"] {
  --paper-chart-series: var(--paper-pencil);
}

.zpres-theme-paper-chalk[data-zpres-palette="dark"] .zpres-chart-svg :is(.zpres-chart-line, .zpres-chart-mark) {
  stroke: var(--paper-chart-series, var(--paper-blue));
}

.zpres-theme-paper-chalk[data-zpres-palette="dark"] .zpres-chart-svg :is(.zpres-chart-point:not(.zpres-chart-direct-annotation-point), .zpres-chart-mark) {
  fill: var(--paper-chart-series, var(--paper-blue));
}

.zpres-theme-paper-chalk :where(.zpres-block-figure figcaption, .zpres-block-gallery figcaption, .zpres-block-media figcaption) {
  color: var(--paper-pencil);
  font-size: var(--text-slide-technical);
  letter-spacing: 0.01em;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-role="main"] :where(.zpres-block-figure figcaption, .zpres-block-gallery figcaption, .zpres-block-media figcaption, .zpres-layout-region-title) {
  font-size: 26px;
}

.zpres-theme-paper-chalk :where(.zpres-chart-axis-label, .zpres-chart-legend, .zpres-chart-annotation) {
  color: var(--paper-ink);
  font-family: "SFMono-Regular", Menlo, Consolas, ui-monospace, monospace;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="section-title"] .zpres-slide-content {
  align-content: center;
  grid-template-rows: max-content max-content max-content;
  gap: var(--spacing-slide-8);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="section-title"] .zpres-slide-header {
  max-width: 70rem;
  padding-block-end: var(--spacing-slide-8);
  border-block-end: 0;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="section-title"] .zpres-slide-title {
  max-width: 30ch;
  font-size: 3rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="section-title"] .zpres-slide-body {
  align-items: start;
  padding-block-start: var(--spacing-slide-8);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="section-title"] .zpres-slide-primary {
  align-content: start;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="section-title"] .zpres-block-fit-text {
  min-height: 0;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="section-title"] .zpres-block-fit-text p {
  max-width: 23ch;
  font-size: 3.5rem;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="section-title"] .zpres-slide-frame::after {
  content: "INDEX";
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="claim"] .zpres-slide-frame::after {
  content: "CLAIM";
  color: var(--paper-rose);
  border-color: var(--paper-rose);
}

/* Class-only lead/result slides use the same compact stacked register as a
   Claim while retaining their checked Source classes as the semantic hook. */
.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-lead.zpres-slide-class-result:not([data-slide-variant]) .zpres-slide-body {
  align-items: stretch;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-lead.zpres-slide-class-result:not([data-slide-variant]) .zpres-slide-primary {
  align-content: start;
  gap: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-lead.zpres-slide-class-result:not([data-slide-variant]) .zpres-block-list :where(ul, ol) {
  gap: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-lead.zpres-slide-class-result:not([data-slide-variant]) .zpres-block-steps :where(ul, ol) {
  margin-block: 0;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="claim"] .zpres-slide-primary {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(0, 1.06fr);
  gap: var(--spacing-slide-8);
  padding: var(--spacing-slide-6);
  border-block: 2px solid var(--paper-rule);
  border-inline-start: 5px solid var(--paper-rose);
  background: color-mix(in srgb, var(--paper-rose) 4%, var(--paper-label-background));
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="claim"] .zpres-slide-primary:has(> .zpres-block-layout) > .zpres-block-fit-text {
  grid-column: 1;
  grid-row: 1;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="claim"] .zpres-slide-primary:has(> .zpres-block-layout) > .zpres-block-math {
  grid-column: 1;
  grid-row: 2;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="claim"] .zpres-slide-primary:has(> .zpres-block-layout) > .zpres-block-layout {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="claim"] .zpres-block-fit-text {
  min-height: 0;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="claim"] .zpres-block-fit-text p,
.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="claim"] .zpres-block-paragraph:first-child {
  max-width: 36ch;
  color: var(--paper-ink);
  font-family: "Avenir Next Condensed", "Arial Narrow", "Aptos Display", ui-sans-serif, sans-serif;
  font-size: 2.75rem;
  font-weight: 760;
  line-height: 1.04;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="claim"] .zpres-slide-primary:has(> .zpres-block-layout) .zpres-block-fit-text p {
  font-size: 2.5rem;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="claim"] :where(.zpres-layout-region p, .zpres-layout-region li, .zpres-block-list, .zpres-block-quote) {
  font-size: var(--text-slide-technical);
  line-height: var(--text-slide-technical--line-height);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="comparison"] .zpres-slide-frame::after {
  content: "COMPARE";
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="comparison"] .zpres-layout-region[data-comparison-role] {
  border-color: var(--paper-rule);
  border-radius: 1px;
  background: var(--paper-label-background);
  box-shadow: inset 0 4px 0 var(--paper-blue);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="comparison"] .zpres-layout-region[data-comparison-role="supporting"] {
  box-shadow: inset 0 4px 0 var(--paper-rose);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="comparison"] .zpres-layout-region :where(p, li) {
  font-size: 26px;
  line-height: var(--text-slide-technical--line-height);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="comparison"] .zpres-layout-region-title {
  display: flex;
  align-items: center;
  column-gap: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="comparison"] .zpres-layout-region-title::before {
  flex: 0 0 auto;
  margin-inline-end: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk :where(.zpres-slide[data-slide-variant="comparison"], .zpres-slide[data-slide-variant="derivation"]) .zpres-layout-region-title {
  color: var(--paper-ink);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="derivation"] .zpres-slide-frame::after {
  content: "WORKING";
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="derivation"] .zpres-slide-title {
  max-width: 34ch;
  font-size: 2.5rem;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="context"],
.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="stage"] {
  border-radius: 1px;
  background: var(--paper-label-background);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="context"] {
  border-inline-start-color: var(--paper-rose);
  padding-inline-start: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="stage"][data-step-state="active"] {
  border-color: var(--paper-blue);
  box-shadow: inset 0 0 0 2px var(--paper-blue), inset -6px 0 0 var(--paper-rose);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="derivation"] .zpres-slide-primary:has(> .zpres-block-figure + .zpres-block-quote) .zpres-block-figure img {
  max-height: 252px;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="figure"] .zpres-slide-frame::after {
  content: "EVIDENCE";
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="figure"] .zpres-slide-header {
  max-width: 54rem;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="dense"] .zpres-slide-frame::after {
  content: "DETAIL";
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="dense"] .zpres-slide-header {
  padding-block-end: var(--spacing-slide-2);
  border-block-end-color: var(--paper-rose);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="dense"] .zpres-slide-primary {
  gap: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="dense"] :where(.zpres-block-code, .zpres-block-math, .zpres-block-table) {
  padding: 4px var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="dense"] .zpres-block-table :where(th, td) {
  padding: 4px var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-variant="dense"] :where(.zpres-block-paragraph, .zpres-block-list) {
  font-size: var(--text-slide-technical);
  line-height: 1.2;
}

.zpres-theme-paper-chalk .zpres-slide[data-slide-role="detail"] .zpres-slide-frame::after {
  content: "DETAIL";
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-register-none .zpres-slide-frame::after {
  display: none;
}

.zpres-theme-paper-chalk :where(.zpres-slide[data-slide-role="detail"], .zpres-slide[data-slide-variant="dense"]) .zpres-slide-title {
  font-family: "Avenir Next", Aptos, "Segoe UI", ui-sans-serif, sans-serif;
  font-size: var(--text-slide-heading);
  font-stretch: normal;
  font-weight: 720;
  letter-spacing: 0;
  line-height: var(--text-slide-heading--line-height);
}

/*
 * A Dense Detail Figure followed by a qualification needs one unscaled
 * Technical register. Cap the visual before autoscale can reduce both the
 * authored caption and the qualification below their intended paint size.
 */
.zpres-theme-paper-chalk .zpres-slide[data-slide-role="detail"][data-slide-variant="dense"] .zpres-slide-primary:has(> .zpres-block-figure + .zpres-block-quote) .zpres-block-figure img {
  max-height: 390px;
}

/*
 * Evidence-shaped Paper Chalk compositions. Each selector is opt-in from the
 * Source file so ordinary Main and Detail slides retain the approved v2 grid.
 */
.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas[data-slide-variant="figure"] {
  --zpres-data-figure-max-block: 492px;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas[data-slide-variant="figure"] .zpres-slide-content {
  grid-template-rows: max-content minmax(0, 1fr) max-content;
  gap: var(--spacing-slide-4);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas[data-slide-variant="figure"] .zpres-slide-header {
  max-width: 50rem;
  padding-block-end: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas[data-slide-variant="figure"] .zpres-slide-title {
  font-size: 2.5rem;
  line-height: 1.04;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-walk-title-wide[data-slide-variant="figure"] .zpres-slide-header,
.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-walk-title-wide[data-slide-variant="figure"] .zpres-slide-title {
  max-width: none;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-walk-title-wide[data-slide-variant="figure"] .zpres-slide-title {
  white-space: nowrap;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas[data-slide-variant="figure"] :where(.zpres-slide-body, .zpres-slide-primary, .zpres-block-figure, .zpres-block-chart) {
  width: 100%;
  min-height: 0;
  height: 100%;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas[data-slide-variant="figure"] .zpres-block-layout .zpres-block-figure {
  align-self: center;
  height: auto;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas[data-slide-variant="figure"] .zpres-slide-primary {
  align-content: stretch;
  gap: var(--spacing-slide-4);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas[data-slide-variant="figure"] :where(.zpres-block-figure img, .zpres-chart-svg) {
  width: 100%;
  height: 100%;
  min-height: 0;
  max-height: 492px;
  border: 0;
  background: var(--paper-evidence-surface);
  box-shadow: var(--paper-depth-1);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas[data-slide-variant="figure"] .zpres-block-layout .zpres-block-figure img {
  height: var(--zpres-figure-height, 100%);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas[data-slide-variant="figure"] .zpres-layout-region[data-region-index="2"] .zpres-block-list {
  font-size: 18px;
  line-height: 1.2;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas[data-slide-variant="figure"] .zpres-layout-region[data-region-index="2"] .zpres-block-list ul {
  gap: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas[data-slide-variant="figure"] .zpres-layout-region[data-region-index="2"] .zpres-block-list li {
  white-space: nowrap;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas.zpres-slide-class-annotation-margin-observation[data-slide-variant="figure"] .zpres-slide-primary {
  grid-template-columns: minmax(0, 1fr) 17rem;
  gap: var(--spacing-slide-6);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas.zpres-slide-class-annotation-margin-observation[data-slide-variant="figure"] .zpres-block-quote {
  padding: var(--spacing-slide-4);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas.zpres-slide-class-annotation-margin-observation[data-slide-variant="figure"] .zpres-block-quote blockquote {
  padding: 0;
  border: 0;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas.zpres-slide-class-annotation-focal-circle[data-slide-variant="figure"] .zpres-slide-primary {
  grid-template-rows: minmax(0, 1fr) max-content;
  gap: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas.zpres-slide-class-annotation-focal-circle[data-slide-variant="figure"] .zpres-block-quote {
  margin: 0;
  padding: var(--spacing-slide-2) var(--spacing-slide-4);
  border: 0;
  border-inline-start: var(--paper-annotation-stroke) solid var(--paper-annotation-ink);
  background: var(--paper-label-background);
  font-size: var(--text-slide-technical);
  font-style: normal;
  line-height: var(--text-slide-technical--line-height);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas.zpres-slide-class-annotation-focal-circle[data-slide-variant="figure"] .zpres-block-quote blockquote,
.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-evidence-canvas.zpres-slide-class-annotation-focal-circle[data-slide-variant="figure"] .zpres-block-quote p {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: inherit;
  line-height: inherit;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline[data-slide-variant="comparison"] .zpres-slide-content {
  grid-template-rows: max-content minmax(0, 1fr) max-content;
  gap: var(--spacing-slide-4);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline[data-slide-variant="comparison"] .zpres-slide-header {
  padding-block-end: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline[data-slide-variant="comparison"] .zpres-slide-title {
  font-size: 2.5rem;
  line-height: 1.04;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline[data-slide-variant="comparison"] .zpres-slide-primary {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr) max-content;
  align-content: stretch;
  gap: var(--spacing-slide-6);
  padding: 0;
  border: 0;
  background: transparent;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline[data-slide-variant="comparison"] .zpres-block-layout {
  min-height: 0;
  height: 100%;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline[data-slide-variant="comparison"] .zpres-layout-region[data-comparison-role] {
  padding: var(--spacing-slide-2) var(--spacing-slide-4) 0;
  border: 0;
  border-block-end: 4px solid var(--paper-blue);
  border-radius: 0;
  background: linear-gradient(0deg, var(--paper-wash), transparent 72%);
  box-shadow: none;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline[data-slide-variant="comparison"] .zpres-layout-region-title {
  padding-block-end: var(--spacing-slide-2);
  border-block-end: 1px solid var(--paper-rule);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline[data-slide-variant="comparison"] .zpres-block-fit-text {
  min-height: 8rem;
  align-content: end;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline[data-slide-variant="comparison"] .zpres-block-fit-text p {
  font-size: 3.5rem;
  line-height: 0.96;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline[data-slide-variant="comparison"] .zpres-layout-region :where(p, li) {
  font-size: var(--text-slide-technical);
  line-height: var(--text-slide-technical--line-height);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline.zpres-slide-class-annotation-delta-bracket[data-slide-variant="comparison"] .zpres-block-quote {
  position: relative;
  width: 100%;
  max-width: none;
  margin: 0;
  padding: var(--spacing-slide-2) var(--spacing-slide-6) var(--spacing-slide-2) var(--spacing-slide-16);
  border: 0;
  border-block: var(--paper-annotation-stroke) solid var(--paper-annotation-ink);
  background: var(--paper-label-background);
  box-shadow: var(--paper-annotation-shadow);
  font-size: var(--text-slide-technical);
  font-style: normal;
  line-height: var(--text-slide-technical--line-height);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline.zpres-slide-class-annotation-delta-bracket[data-slide-variant="comparison"] .zpres-block-quote::before {
  content: "";
  position: absolute;
  inset-block: var(--spacing-slide-2);
  inset-inline-start: var(--spacing-slide-4);
  width: var(--spacing-slide-4);
  border-block: var(--paper-annotation-stroke) solid var(--paper-annotation-ink);
  border-inline-start: var(--paper-annotation-stroke) solid var(--paper-annotation-ink);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline.zpres-slide-class-annotation-delta-bracket[data-slide-variant="comparison"] .zpres-block-quote blockquote {
  padding: 0;
  border: 0;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-comparison-baseline.zpres-slide-class-annotation-delta-bracket[data-slide-variant="comparison"] .zpres-block-quote p {
  font-size: inherit;
  line-height: inherit;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-slide-content {
  gap: var(--spacing-slide-4);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-slide-body {
  align-items: stretch;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] :where(.zpres-slide-primary, .zpres-block-layout) {
  height: 100%;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-slide-title {
  font-family: "Avenir Next", Aptos, "Segoe UI", ui-sans-serif, sans-serif;
  font-size: var(--text-slide-heading);
  font-stretch: normal;
  font-weight: 720;
  line-height: var(--text-slide-heading--line-height);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role] {
  position: relative;
  min-height: 5.5rem;
  grid-template-columns: minmax(11rem, 0.3fr) minmax(0, 1fr);
  align-items: center;
  gap: var(--spacing-slide-6);
  padding: var(--spacing-slide-2) var(--spacing-slide-4);
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  opacity: 1;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="stage"] {
  min-height: 7rem;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="context"] {
  padding-inline-start: var(--spacing-slide-4);
  border-inline-start: 6px double var(--paper-blue);
  border-block-end: 1px solid var(--paper-rule);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="stage"]::after {
  content: "";
  position: absolute;
  z-index: 0;
  inset-block-start: calc(var(--spacing-slide-2) + 2.5rem);
  inset-block-end: calc(-1 * var(--spacing-slide-4));
  inset-inline-start: calc(var(--spacing-slide-4) + 1.25rem);
  border-inline-start: 3px solid var(--paper-rule);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="stage"][data-step-state="future"]::before {
  content: attr(data-step-index);
  position: absolute;
  z-index: 1;
  inset-block-start: var(--spacing-slide-2);
  inset-inline-start: var(--spacing-slide-4);
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  visibility: visible;
  color: color-mix(in srgb, var(--paper-blue) 64%, var(--paper-pencil));
  border: 2px solid color-mix(in srgb, var(--paper-blue) 52%, var(--paper-rule));
  border-radius: 999px;
  background: var(--paper-evidence-surface);
  font-family: "SFMono-Regular", Menlo, Consolas, ui-monospace, monospace;
  font-size: var(--text-slide-technical);
  font-weight: 760;
  line-height: 1;
  opacity: 0.88;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="stage"][data-step-state="future"]::after {
  visibility: visible;
  border-inline-start-color: color-mix(in srgb, var(--paper-blue) 46%, var(--paper-rule));
  opacity: 0.86;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="stage"]:last-child::after {
  display: none;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-layout-region-title {
  position: relative;
  z-index: 1;
  padding: 0;
  border: 0;
  letter-spacing: 0.035em;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="stage"] .zpres-layout-region-title::before {
  min-width: 2.5rem;
  min-height: 2.5rem;
  margin-inline-end: var(--spacing-slide-4);
  background: var(--paper-evidence-surface);
  font-size: var(--text-slide-technical);
  line-height: 1;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="stage"][data-step-state="active"] {
  border: 0;
  background: var(--paper-wash);
  box-shadow: none;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="stage"][data-step-state="active"] .zpres-layout-region-title::before {
  border-radius: 999px;
  color: var(--paper-surface);
  border-color: var(--paper-blue);
  background: var(--paper-blue);
  box-shadow: inset 0 0 0 4px var(--paper-evidence-surface);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="stage"][data-step-state="active"] {
  padding-block-end: var(--spacing-slide-2);
  border-block-end: 3px double var(--paper-blue);
  font-weight: 650;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path.zpres-slide-class-annotation-checkpoint[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="stage"]:last-child {
  padding-block-end: var(--spacing-slide-4);
  border: 0;
  border-block-end: var(--paper-annotation-stroke) double var(--paper-annotation-ink);
  border-inline-end: 6px solid var(--paper-annotation-ink);
  background: color-mix(in srgb, var(--paper-annotation-ink) 4%, transparent);
  box-shadow: none;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-derivation-path.zpres-slide-class-annotation-checkpoint[data-slide-variant="derivation"] .zpres-layout-region[data-derivation-role="stage"]:last-child .zpres-layout-region-title {
  text-decoration-line: underline;
  text-decoration-color: var(--paper-annotation-ink);
  text-decoration-thickness: var(--paper-annotation-stroke);
  text-underline-offset: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-detail-ledger[data-slide-role="detail"][data-slide-variant="dense"] .zpres-slide-primary {
  height: 100%;
  grid-template-columns: minmax(0, 1fr) 16rem;
  align-content: center;
  align-items: start;
  gap: var(--spacing-slide-6);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-detail-ledger[data-slide-role="detail"][data-slide-variant="dense"] .zpres-slide-body {
  align-items: stretch;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-detail-ledger[data-slide-role="detail"][data-slide-variant="dense"] .zpres-slide-supporting:empty {
  display: none;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-detail-ledger[data-slide-role="detail"][data-slide-variant="dense"] .zpres-block-table {
  grid-column: 1;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-detail-ledger[data-slide-role="detail"][data-slide-variant="dense"] .zpres-block-quote {
  grid-column: 2;
  margin: 0;
  padding: var(--spacing-slide-4);
  border: 0;
  border-inline-start: 5px solid var(--paper-rose);
  background: var(--paper-label-background);
  font-size: var(--text-slide-technical);
  line-height: var(--text-slide-technical--line-height);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-detail-ledger[data-slide-role="detail"][data-slide-variant="dense"] .zpres-block-quote blockquote {
  padding: 0;
  border: 0;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-detail-trace[data-slide-role="detail"][data-slide-variant="dense"] .zpres-slide-primary {
  height: 100%;
  align-content: center;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-detail-trace[data-slide-role="detail"][data-slide-variant="dense"] .zpres-slide-body {
  align-items: stretch;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-detail-trace[data-slide-role="detail"][data-slide-variant="dense"] .zpres-slide-supporting:empty {
  display: none;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-detail-trace[data-slide-role="detail"][data-slide-variant="dense"] .zpres-block-code {
  padding: 0;
  border: 0;
  background: transparent;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-detail-trace[data-slide-role="detail"][data-slide-variant="dense"] .zpres-block-code pre {
  display: grid;
  min-height: 18rem;
  align-items: center;
  padding: var(--spacing-slide-6) var(--spacing-slide-8);
  font-size: 1.75rem;
  line-height: 1.25;
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-detail-trace[data-slide-role="detail"][data-slide-variant="dense"] .zpres-block-code code {
  align-content: center;
  gap: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide.zpres-slide-class-paper-detail-trace[data-slide-role="detail"][data-slide-variant="dense"] .zpres-code-line {
  grid-template-columns: 3ch minmax(0, 1fr);
  gap: var(--spacing-slide-4);
}

.zpres-theme-paper-chalk .zpres-slide[data-theme-param-density="compact"] {
  --paper-pad: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide[data-theme-param-density="compact"] :where(.zpres-slide-content, .zpres-slide-primary) {
  gap: var(--spacing-slide-2);
}

.zpres-theme-paper-chalk .zpres-slide[data-theme-param-density="spacious"] {
  --paper-pad: var(--spacing-slide-8);
}

.zpres-theme-paper-chalk .zpres-slide[data-theme-param-density="spacious"] :where(.zpres-slide-content, .zpres-slide-primary) {
  gap: var(--spacing-slide-8);
}

@media (prefers-contrast: more) {
  .zpres-theme-paper-chalk .zpres-slide-frame {
    background: var(--paper-surface);
  }
}

@media (forced-colors: active) {
  .zpres-theme-paper-chalk .zpres-slide-frame::before,
  .zpres-theme-paper-chalk .zpres-slide-frame::after {
    color: CanvasText;
    border-color: CanvasText;
  }

  .zpres-theme-paper-chalk .zpres-slide[class*="zpres-slide-class-annotation-"] {
    --paper-annotation-ink: CanvasText;
  }
}

:where(.zpres-api-v2.zpres-theme-paper-chalk, .zpres-api-v2 .paper-chalk-theme) {
  --zpres-param-accent: #1e4f9a;
  --zpres-color-accent: #1e4f9a;
  --zpres-param-accent-alt: #a4475a;
  --zpres-color-accent-alt: #a4475a;
  --zpres-param-background: #f4f0e6;
  --zpres-color-background: #f4f0e6;
  --zpres-param-density: normal;
  --zpres-param-font-body: "Avenir Next", Aptos, "Segoe UI", ui-sans-serif, sans-serif;
  --zpres-font-body: "Avenir Next", Aptos, "Segoe UI", ui-sans-serif, sans-serif;
  --zpres-param-font-heading: "Avenir Next Condensed", "Arial Narrow", "Aptos Display", ui-sans-serif, sans-serif;
  --zpres-font-heading: "Avenir Next Condensed", "Arial Narrow", "Aptos Display", ui-sans-serif, sans-serif;
  --zpres-param-font-mono: "SFMono-Regular", Menlo, Consolas, ui-monospace, monospace;
  --zpres-font-mono: "SFMono-Regular", Menlo, Consolas, ui-monospace, monospace;
  --zpres-param-footer: slide-number;
  --zpres-param-mode: light;
  --zpres-param-muted: #526783;
  --zpres-color-muted: #526783;
  --zpres-param-rule: #c9d7e6;
  --zpres-color-rule: #c9d7e6;
  --zpres-param-surface: #fffdf4;
  --zpres-color-surface: #fffdf4;
  --zpres-param-text: #162b4d;
  --zpres-color-text: #162b4d;
}
}