:root {
  /* Palette (neutral paper; keep warmth subtle) */
  --gp-paper: #f6f6f4;
  --gp-wall: #e2e4e8;
  --gp-ink: #0a0a0a;
  --gp-ink2: rgba(10, 10, 10, 0.78);
  --gp-rule: #000;
  --gp-rule-strong: #000;
  --gp-grid-dot: rgba(10, 10, 10, 0.095);

  --gp-grain-opacity: 0.18;
  --gp-scanline-opacity: 0.045;

  /* Accent used for stamps + occasional highlights */
  --gp-accent: #d83a2e;
  --gp-accent2: #ff5a1f;

  --gp-grotesk: "IBM Plex Sans Condensed", "IBM Plex Sans", "Inter", system-ui, -apple-system, "Segoe UI", Helvetica,
    Arial, sans-serif;
  --gp-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;

  --gp-pad-x: 78px;
  --gp-pad-y: 62px;
  --gp-header-h: 42px;
  --gp-footer-h: 70px;
  --gp-corner-frame: 1.5px;
  --gp-corner-panel-w: 260px;
  --gp-corner-square: 54px;

  --gp-dot-step: 32px;
  --gp-dot-size: 1px;
  --gp-mark-m: 34px;
  --gp-mark-sq: 14px;
  --gp-mark-sq-sm: 10px;
  --gp-shadow: 0 18px 60px rgba(0, 0, 0, 0.14);
}

html,
body {
  margin: 0;
  height: 100%;
  background: var(--gp-paper);
}

body:not(.reveal-scroll) {
  overflow: hidden;
}

body.reveal-scroll {
  height: auto;
  background: var(--gp-wall);
}

body.reveal-scroll .reveal .slides section.gp-slide {
  box-shadow: var(--gp-shadow);
}

.reveal {
  background: var(--gp-paper);
  color: var(--gp-ink);
  font-family: var(--gp-grotesk);
}

.reveal .slides {
  text-align: left;
}

/* Keep all reveal slide sections anchored to the same origin in deck mode.
   Without this, some browsers can place non-first absolute slides off-canvas. */
.reveal:not(.reveal-scroll) .slides > section,
.reveal:not(.reveal-scroll) .slides > section > section {
  top: 0;
  left: 0;
}

.reveal .slides section {
  box-sizing: border-box;
  padding: calc(var(--gp-pad-y) + var(--gp-header-h)) var(--gp-pad-x)
    calc(var(--gp-pad-y) + var(--gp-footer-h));
}

/* Surface */
.reveal .slides section.gp-slide {
  background-color: var(--gp-paper);
  background-image:
    radial-gradient(1200px 800px at 22% 12%, rgba(255, 255, 255, 0.75), transparent 55%),
    radial-gradient(1600px 900px at 50% 58%, transparent 62%, rgba(0, 0, 0, 0.06) 100%),
    radial-gradient(circle, var(--gp-grid-dot) var(--gp-dot-size), transparent var(--gp-dot-size));
  background-size: var(--gp-dot-step) var(--gp-dot-step);
}

/* In deck mode, reveal.js positions slides absolutely.
   Do not override that, or non-first slides render off-canvas.
   In scroll mode, keep slides as normal flow containers. */
.reveal.reveal-scroll .slides section.gp-slide {
  position: relative;
}

.gp-marks {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 1;
  z-index: 0;
}

.reveal .slides section.gp-slide > :not(.gp-marks):not(.gp-cites):not(.gp-stamp):not(.gp-corner-matrix) {
  position: relative;
  z-index: 1;
}

.gp-marks::before {
  content: none;
}

.gp-marks::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: var(--gp-grain-opacity);
  mix-blend-mode: multiply;
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='320' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='320' height='220' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E"),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='320' height='220'%3E%3Cfilter id='s'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.95' numOctaves='1' seed='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 10 -6'/%3E%3C/filter%3E%3Crect width='320' height='220' filter='url(%23s)' opacity='.65'/%3E%3C/svg%3E"),
    repeating-linear-gradient(
      0deg,
      rgba(0, 0, 0, var(--gp-scanline-opacity)) 0,
      rgba(0, 0, 0, var(--gp-scanline-opacity)) 1px,
      transparent 1px,
      transparent 6px
    );
  background-blend-mode: multiply;
}

/* Header + folio */
.reveal .slides section.gp-slide::before {
  content: attr(data-running-head);
  position: absolute;
  top: var(--gp-pad-y);
  left: var(--gp-pad-x);
  font-family: var(--gp-mono);
  font-size: 18px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gp-ink2);
  white-space: nowrap;
  text-shadow: 0.7px 0 rgba(0, 0, 0, 0.18), -0.4px 0 rgba(0, 0, 0, 0.1);
}

.reveal .slides section.gp-slide::after {
  content: attr(data-gp-folio);
  position: absolute;
  right: var(--gp-pad-x);
  bottom: calc(var(--gp-pad-y) + 10px);
  font-family: var(--gp-mono);
  font-size: 18px;
  letter-spacing: 0.08em;
  color: var(--gp-ink2);
  text-shadow: 0.7px 0 rgba(0, 0, 0, 0.18), -0.4px 0 rgba(0, 0, 0, 0.1);
}

.gp-corner-matrix {
  position: absolute;
  top: calc(var(--gp-pad-y) - 4px);
  right: var(--gp-pad-x);
  z-index: 3;
  width: min(var(--gp-corner-panel-w), calc(100% - (var(--gp-pad-x) * 2)));
  height: var(--gp-corner-square);
  display: grid;
  grid-template-columns: minmax(0, 1fr) calc(var(--gp-corner-square) - (var(--gp-corner-frame) * 2));
  border: var(--gp-corner-frame) solid var(--gp-rule-strong);
  background: transparent;
  color: var(--gp-ink);
  pointer-events: none;
  box-sizing: border-box;
}

.gp-corner-matrix__meta {
  border-right: var(--gp-corner-frame) solid var(--gp-rule-strong);
  padding: 5px 7px 4px 7px;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 6px;
  justify-content: flex-start;
  min-width: 0;
  white-space: nowrap;
}

.gp-corner-matrix__section {
  font-family: var(--gp-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1;
  color: var(--gp-ink2);
  flex: 0 0 auto;
}

.gp-corner-matrix__title {
  margin-top: 0;
  font-family: var(--gp-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1;
  color: var(--gp-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1 1 auto;
}

.gp-corner-matrix__grid {
  width: 100%;
  height: 100%;
  padding: 2px;
  box-sizing: border-box;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  grid-template-rows: repeat(5, minmax(0, 1fr));
  gap: 2px;
}

.gp-corner-matrix__cell {
  aspect-ratio: 1 / 1;
  border: 1.4px solid #000;
  box-sizing: border-box;
  padding: 0;
  background: transparent;
}

.gp-corner-matrix__cell.is-trace {
  background: transparent;
}

.gp-corner-matrix__cell.is-on {
  background: #000;
}

.gp-corner-matrix__cell.is-hot {
  background: #000;
}

/* Type */
.reveal h1,
.reveal h2,
.reveal h3 {
  font-family: var(--gp-grotesk);
  margin: 0 0 18px 0;
  letter-spacing: -0.01em;
}

.reveal h1 {
  font-size: 92px;
  line-height: 0.98;
  font-weight: 800;
}

.reveal h2 {
  font-size: 54px;
  line-height: 1.05;
  font-weight: 800;
}

.reveal .slides section.gp-claim h1,
.reveal .slides section.gp-divider h1 {
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.reveal .slides section.gp-claim h1 {
  font-size: 112px;
  line-height: 0.94;
}

.reveal p,
.reveal li,
.reveal blockquote {
  font-size: 32px;
  line-height: 1.26;
}

.gp-center {
  display: flex;
  align-items: center;
  height: 100%;
}

.gp-center > div {
  width: 100%;
}

.gp-mono {
  font-family: var(--gp-mono);
}

.gp-kicker {
  font-family: var(--gp-mono);
  font-size: 18px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gp-ink2);
  margin: 0 0 14px 0;
}

.gp-tag {
  display: inline-block;
  padding: 8px 10px 7px 10px;
  background: var(--gp-ink);
  color: var(--gp-paper);
  border: 2px solid var(--gp-ink);
  font-family: var(--gp-mono);
  font-size: 14px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  line-height: 1;
  text-shadow: 0.6px 0 rgba(0, 0, 0, 0.22), -0.4px 0 rgba(0, 0, 0, 0.12);
}

.gp-kicker.gp-tag {
  margin: 0 0 18px 0;
}

.gp-code {
  font-family: var(--gp-grotesk);
  font-size: 120px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 0.9;
  margin: 0 0 18px 0;
}

.gp-subtitle {
  max-width: 42ch;
  margin: 0;
  color: var(--gp-ink2);
  font-family: var(--gp-mono);
  font-size: 26px;
  line-height: 1.35;
}

.gp-meta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
  max-width: 980px;
}

.gp-block {
  border: 2px solid var(--gp-rule-strong);
  padding: 14px 14px 12px 14px;
  font-family: var(--gp-mono);
  font-size: 16px;
  line-height: 1.25;
  color: var(--gp-ink);
  background: rgba(255, 255, 255, 0.18);
}

.gp-block .gp-label {
  display: inline-block;
  padding: 4px 6px 3px 6px;
  margin-bottom: 12px;
  background: var(--gp-ink);
  color: var(--gp-paper);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.gp-accent-bar {
  height: 4px;
  width: min(var(--gp-underline-width, 24ch), 100%);
  background: var(--gp-ink);
  margin: 18px 0 28px 0;
}

/* Rubber stamp */
.gp-stamp {
  position: absolute;
  top: calc(var(--gp-pad-y) + var(--gp-header-h) + 54px);
  right: var(--gp-pad-x);
  z-index: 3;
  transform: rotate(-12deg);
  border: 4px solid var(--gp-accent);
  color: var(--gp-accent);
  padding: 14px 18px 12px 18px;
  font-family: var(--gp-mono);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 22px;
  line-height: 1.05;
  text-align: center;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.08);
  mix-blend-mode: multiply;
  filter: saturate(0.9) contrast(1.25);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.12) inset;
  text-shadow: 0.8px 0 rgba(0, 0, 0, 0.2), -0.4px 0 rgba(0, 0, 0, 0.12);
}

.gp-stamp::after {
  content: "";
  position: absolute;
  inset: -6px;
  pointer-events: none;
  opacity: 0.22;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='120' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

.reveal .slides section.gp-outline .gp-list {
  max-width: 720px;
}

.reveal .slides section.gp-outline .gp-stamp {
  top: calc(var(--gp-pad-y) + var(--gp-header-h) + 160px);
  right: calc(var(--gp-pad-x) + 30px);
}

.reveal .slides section.gp-diagram .gp-stamp {
  top: calc(var(--gp-pad-y) + var(--gp-header-h) + 210px);
}

/* Citation band */
.gp-cites {
  position: absolute;
  z-index: 2;
  left: var(--gp-pad-x);
  right: var(--gp-pad-x);
  bottom: var(--gp-pad-y);
  border-top: 2px solid var(--gp-rule-strong);
  padding-top: 10px;
  padding-right: 100px; /* reserve for folio */
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-family: var(--gp-mono);
  font-size: 16px;
  line-height: 1.25;
  color: var(--gp-ink2);
  text-shadow: 0.7px 0 rgba(0, 0, 0, 0.16), -0.4px 0 rgba(0, 0, 0, 0.08);
}

.gp-cite {
  font-family: var(--gp-mono);
  font-size: 0.7em;
  letter-spacing: 0.03em;
  vertical-align: super;
  color: var(--gp-ink2);
}

/* Lists */
.gp-list {
  list-style: none;
  margin: 18px 0 0 0;
  padding: 0;
  max-width: 980px;
  font-family: var(--gp-mono);
}

.gp-list li {
  position: relative;
  padding-left: 1.4em;
  margin: 12px 0;
}

.gp-list li::before {
  content: "•";
  position: absolute;
  left: 0.2em;
  color: var(--gp-ink);
  font-size: 30px;
  line-height: 1;
}

.gp-list.gp-auto-columns-list,
.gp-refs.gp-auto-columns-list {
  columns: 2;
  column-gap: 56px;
  column-fill: balance;
}

.gp-list.gp-auto-columns-list > li,
.gp-refs.gp-auto-columns-list > li {
  break-inside: avoid;
}

.gp-auto-columns-content.gp-auto-columns-content--active {
  columns: 2;
  column-gap: 56px;
  max-width: 1500px;
}

.gp-auto-columns-content.gp-auto-columns-content--active > * {
  break-inside: avoid;
}

.gp-auto-columns-content.gp-auto-columns-content--active > * + * {
  margin-top: 16px;
}

/* Reading (text heavy) */
.gp-reading-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 0.7fr;
  gap: 42px;
  align-items: start;
  max-width: 1500px;
}

.gp-body {
  margin: 0 0 18px 0;
  font-family: var(--gp-mono);
  font-size: 28px;
  line-height: 1.42;
}

.gp-note {
  border-left: 2px solid var(--gp-rule-strong);
  padding-left: 18px;
}

.gp-note .gp-label {
  font-family: var(--gp-mono);
  display: inline-block;
  padding: 5px 7px 4px 7px;
  background: var(--gp-ink);
  color: var(--gp-paper);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.gp-note p {
  font-family: var(--gp-mono);
  font-size: 18px;
  line-height: 1.35;
  margin: 0 0 12px 0;
  color: var(--gp-ink2);
}

/* Quote */
.gp-quote {
  max-width: 1100px;
}

.gp-quote-mark {
  font-family: var(--gp-grotesk);
  font-size: 110px;
  line-height: 0.75;
  color: var(--gp-ink);
  margin-bottom: 14px;
}

.reveal blockquote {
  margin: 0;
  padding: 0;
  border: none;
  box-shadow: none;
}

.reveal blockquote p {
  margin: 0 0 18px 0;
  font-family: var(--gp-mono);
  font-size: 44px;
  line-height: 1.08;
}

.gp-quote-slide blockquote p {
  font-family: var(--gp-grotesk);
  font-size: 76px;
  font-weight: 800;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  line-height: 0.98;
}

.gp-attrib {
  font-family: var(--gp-mono);
  font-size: 18px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gp-ink2);
  margin: 0 0 18px 0;
}

/* Exhibit images */
.gp-figure {
  margin: 0;
  width: 100%;
  max-width: none;
}

.gp-frame {
  border: 2px solid var(--gp-rule-strong);
  padding: 12px;
  background: rgba(255, 255, 255, 0.24);
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
}

.gp-media {
  position: relative;
  width: 100%;
  isolation: isolate;
}

.gp-frame-img {
  display: block;
  max-width: 100%;
  height: auto;
  box-sizing: border-box;
}

.reveal figcaption {
  font-family: var(--gp-mono);
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--gp-ink2);
  margin-top: 10px;
}

.reveal figure.gp-figure figcaption {
  border-top: 2px solid var(--gp-rule-strong);
  padding-top: 12px;
  margin-top: 14px;
}

.reveal .slides section.gp-exhibit .gp-figure {
  margin-top: 14px;
}

.reveal .slides section.gp-exhibit .gp-frame {
  display: block;
  overflow: hidden;
}

.reveal .slides section.gp-exhibit .gp-media--exhibit {
  width: 100%;
  height: clamp(340px, 54vh, 640px);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.9);
}

.reveal .slides section.gp-exhibit .gp-frame-img {
  width: 100%;
  height: 100%;
  max-height: none;
  object-fit: cover;
  object-position: center;
}

.gp-two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 760px);
  gap: 64px;
  align-items: start;
  max-width: 1500px;
}

.gp-two-col > figure {
  width: 100%;
}

/* Filter lab */
.gp-filter-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 44px;
  align-items: start;
  max-width: 1600px;
}

.gp-filter-grid .gp-frame-img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  object-position: center;
}

/* Stamps are intentionally disabled for this style revision. */
.gp-stamp {
  display: none !important;
}

/* References */
.gp-refs {
  margin: 18px 0 0 0;
  padding: 0;
  list-style: none;
  max-width: 1400px;
}

.gp-refs li {
  font-family: var(--gp-mono);
  font-size: 20px;
  line-height: 1.4;
  margin: 12px 0;
  color: var(--gp-ink2);
}

.gp-refs .gp-ref-key {
  color: var(--gp-ink);
  font-weight: 600;
}

/* Diagram/Chart SVG helpers */
.gp-svg {
  width: 100%;
  max-width: 1400px;
  height: auto;
  display: block;
}

.gp-svg text {
  font-family: var(--gp-mono);
  fill: rgba(17, 17, 17, 0.8);
  font-size: 18px;
}

.gp-svg .gp-stroke {
  stroke: #000;
  stroke-width: 2;
  fill: none;
}

.gp-svg .gp-accent {
  stroke: var(--gp-accent);
  stroke-width: 4;
  fill: none;
}

.gp-svg .gp-box {
  fill: rgba(255, 255, 255, 0.5);
  stroke: #000;
  stroke-width: 2;
}

/* Simple table */
.gp-table {
  width: 100%;
  max-width: 1400px;
  border-collapse: collapse;
  font-family: var(--gp-mono);
  font-size: 18px;
}

.gp-table th,
.gp-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--gp-rule);
}

.gp-table th {
  text-align: left;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 14px;
  color: var(--gp-ink2);
}

@media (max-width: 1320px) {
  .gp-list.gp-auto-columns-list,
  .gp-refs.gp-auto-columns-list,
  .gp-auto-columns-content.gp-auto-columns-content--active {
    columns: 1;
  }

  .gp-corner-matrix {
    width: min(238px, calc(100% - (var(--gp-pad-x) * 2)));
    height: 50px;
    grid-template-columns: minmax(0, 1fr) calc(50px - (var(--gp-corner-frame) * 2));
  }

  .gp-corner-matrix__meta {
    padding: 4px 6px 3px 6px;
    gap: 4px;
  }

  .gp-corner-matrix__section {
    font-size: 8px;
  }

  .gp-corner-matrix__title {
    margin-top: 0;
    font-size: 8px;
  }
}

/* Print */
@media print {
  @page {
    size: 13.333in 7.5in;
    margin: 0;
  }

  html,
  body {
    height: auto !important;
    overflow: visible !important;
  }

  .reveal {
    background: var(--gp-paper) !important;
  }

  .reveal .slides {
    position: static !important;
    transform: none !important;
    width: auto !important;
    height: auto !important;
  }

  .reveal .slides > section {
    display: block !important;
    position: relative !important;
    transform: none !important;
    page-break-after: always;
    break-after: page;
  }

  .reveal .slides > section:last-of-type {
    page-break-after: auto;
    break-after: auto;
  }

  .reveal .controls,
  .reveal .progress {
    display: none !important;
  }
}