:root {
  /* Color system: orange = primary titles and structure,
     purple = technical emphasis and support,
     rose = critical alerts and sharp contrast */
  color-scheme: dark;
  --page-gutter: 2.5rem;
  --slide-width: 60rem;
  --slide-height: 33.75rem;
  --canvas: #010203;
  --canvas-primary: rgba(255, 102, 0, 0.16);
  --canvas-secondary: rgba(92, 60, 255, 0.14);
  --canvas-danger: rgba(238, 56, 83, 0.08);
  --paper: #05070a;
  --paper-strong: #090d12;
  --text: #edf4ff;
  --headline: #FF6600;
  --muted: #9ba8bc;
  --line: rgba(255, 102, 0, 0.22);
  --line-strong: rgba(92, 60, 255, 0.22);
  --accent-primary: #FF6600;
  --accent-primary-strong: #FFB380;
  --accent-primary-soft: rgba(255, 102, 0, 0.16);
  --accent-secondary: #5C3CFF;
  --accent-secondary-strong: #CDC2FF;
  --accent-secondary-soft: rgba(92, 60, 255, 0.16);
  --accent-danger: #EE3853;
  --accent-danger-strong: #FF9FB0;
  --accent-danger-soft: rgba(238, 56, 83, 0.18);
  --code-bg: #02050a;
  --code-fg: #e8f3ff;
  --shadow: 0 28px 64px rgba(0, 0, 0, 0.45);
  --radius: 1.5rem;
  --surface-note: rgba(255, 255, 255, 0.06);
  --surface-note-line: rgba(255, 255, 255, 0.1);
  --surface-note-text: rgba(255, 255, 255, 0.88);
  --has-darkmode: 1;
}

* {
  box-sizing: border-box;
}

html {
  font:
    16px/1.35 "SF Pro Display", "PingFang SC", "Hiragino Sans GB",
    "Noto Sans CJK SC", "Avenir Next", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  margin: var(--page-gutter);
  color: var(--text);
  counter-reset: slide;
  background:
    radial-gradient(circle at top right, var(--canvas-primary), transparent 28rem),
    radial-gradient(circle at bottom left, var(--canvas-secondary), transparent 24rem),
    radial-gradient(circle at top left, var(--canvas-danger), transparent 18rem),
    linear-gradient(180deg, #07090c 0%, var(--canvas) 100%);
}

.b6-ui {
  position: sticky;
  top: 0;
  z-index: 80;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  width: calc(100% + (2 * var(--page-gutter)));
  max-width: none;
  margin: calc(-1 * var(--page-gutter)) 0 1.35rem calc(-1 * var(--page-gutter));
  padding: 0.9rem var(--page-gutter);
  border: 0;
  border-bottom: 1px solid rgba(255, 102, 0, 0.14);
  border-radius: 0 0 1.1rem 1.1rem;
  background:
    linear-gradient(180deg, rgba(9, 13, 19, 0.7), rgba(4, 7, 12, 0.82)),
    radial-gradient(circle at top right, rgba(255, 102, 0, 0.1), transparent 14rem),
    radial-gradient(circle at bottom left, rgba(92, 60, 255, 0.1), transparent 12rem);
  box-shadow:
    0 14px 30px rgba(0, 0, 0, 0.2),
    inset 0 0 0 1px rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(18px) saturate(1.2);
}

.b6-ui button {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 0.48rem;
  min-height: 2.5rem;
  padding: 0.55rem 0.9rem;
  border: 0;
  border-radius: 0.9rem;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font: inherit;
  font-size: 0.92rem;
  font-weight: 560;
  letter-spacing: -0.01em;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05);
  transition:
    transform 160ms ease,
    background-color 160ms ease,
    box-shadow 160ms ease,
    color 160ms ease;
}

.b6-ui button:hover {
  background: rgba(255, 255, 255, 0.08);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.09),
    0 8px 20px rgba(0, 0, 0, 0.2);
  transform: translateY(-1px);
}

.b6-ui button:focus-visible {
  outline: none;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.12),
    0 0 0 2px rgba(255, 102, 0, 0.45),
    0 8px 20px rgba(0, 0, 0, 0.24);
}

.b6-ui button span[aria-hidden="true"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.2rem;
  color: var(--accent-primary-strong);
  font-size: 1rem;
}

.b6-ui .b6-playbutton,
.b6-ui .b6-secondwindowbutton {
  background: linear-gradient(135deg, rgba(255, 102, 0, 0.2), rgba(255, 102, 0, 0.1));
  box-shadow: inset 0 0 0 1px rgba(255, 102, 0, 0.16);
}

.b6-ui .b6-playbutton:hover,
.b6-ui .b6-secondwindowbutton:hover {
  background: linear-gradient(135deg, rgba(255, 102, 0, 0.28), rgba(255, 102, 0, 0.14));
}

.b6-ui .b6-commentbutton,
.b6-ui .b6-darkmodebutton {
  background: linear-gradient(135deg, rgba(92, 60, 255, 0.2), rgba(92, 60, 255, 0.08));
  box-shadow: inset 0 0 0 1px rgba(92, 60, 255, 0.16);
}

.b6-ui .b6-commentbutton:hover,
.b6-ui .b6-darkmodebutton:hover {
  background: linear-gradient(135deg, rgba(92, 60, 255, 0.28), rgba(92, 60, 255, 0.12));
}

.b6-ui .b6-helpbutton {
  margin-left: 0.2rem;
}

a {
  color: var(--accent-secondary-strong);
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: -0.04em;
  line-height: 1.03;
  font-weight: 650;
}

h1 {
  font-size: 2.7rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

h1,
h2 {
  color: var(--headline);
}

h3 {
  color: var(--accent-secondary-strong);
}

p,
li,
dd,
dt {
  font-size: 1.16rem;
  line-height: 1.55;
}

p,
ul,
ol,
dl,
pre,
blockquote {
  margin: 0;
}

small,
.caption,
.note {
  font-size: 0.92rem;
  line-height: 1.45;
}

code,
pre {
  font-family: "SF Mono", "JetBrains Mono", "IBM Plex Mono", "Menlo", monospace;
}

code {
  padding: 0.14em 0.4em;
  border-radius: 0.55em;
  background: var(--accent-secondary-soft);
  color: var(--accent-secondary-strong);
  font-size: 0.92em;
}

pre {
  overflow: auto;
  padding: 1.35rem 1.5rem;
  border-radius: 1.2rem;
  background: var(--code-bg);
  color: var(--code-fg);
  font-size: 0.98rem;
  line-height: 1.55;
  box-shadow: inset 0 0 0 1px var(--accent-secondary-soft);
}

strong {
  font-weight: 700;
  color: var(--accent-secondary-strong);
}

em {
  font-style: normal;
  color: var(--accent-secondary-strong);
}

ul,
ol {
  padding-left: 1.3rem;
}

li + li {
  margin-top: 0.45rem;
}

li::marker {
  color: var(--accent-primary-strong);
}

.slide {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  gap: 1.35rem;
  width: min(100%, var(--slide-width));
  /* b6plus textfit/autosize only work reliably when slides have a fixed height. */
  height: var(--slide-height);
  margin: 0 2.25rem 2.25rem 0;
  padding: 2.15rem 2.35rem 1.95rem;
  vertical-align: top;
  overflow: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(255, 102, 0, 0.18), transparent 22rem),
    radial-gradient(circle at bottom left, rgba(92, 60, 255, 0.12), transparent 18rem),
    radial-gradient(circle at center right, rgba(238, 56, 83, 0.08), transparent 16rem),
    linear-gradient(180deg, rgba(8, 12, 18, 0.98), rgba(4, 6, 10, 1)),
    var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  counter-increment: slide;
}

.slide::before {
  content: "";
  position: absolute;
  top: -6rem;
  right: -8rem;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 102, 0, 0.2), rgba(255, 102, 0, 0));
  pointer-events: none;
}

.slide::after {
  content: counter(slide, decimal-leading-zero);
  position: absolute;
  right: 1.45rem;
  bottom: 1.1rem;
  color: rgba(255, 179, 128, 0.82);
  letter-spacing: 0.14em;
  font-size: 0.76rem;
  font-weight: 700;
}

.slide.clear-number::after {
  content: none;
}

.slide > :last-child,
.b6textfitwrapper > :last-child {
  margin-bottom: 0;
}

.print-deck-url {
  display: none;
}

.eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--accent-primary-strong);
}

.lede {
  max-width: 44rem;
  color: var(--muted);
  font-size: 1.45rem;
  line-height: 1.45;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.35rem;
  color: var(--muted);
  font-size: 0.96rem;
}

.label-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: auto;
}

.label {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 102, 0, 0.28);
  background: linear-gradient(135deg, rgba(255, 102, 0, 0.18), rgba(255, 102, 0, 0.08));
  color: var(--accent-primary-strong);
  font-size: 0.85rem;
  font-weight: 600;
}

.label.info {
  border-color: rgba(92, 60, 255, 0.26);
  background: linear-gradient(135deg, rgba(92, 60, 255, 0.18), rgba(92, 60, 255, 0.08));
  color: var(--accent-secondary-strong);
}

.label.danger {
  border-color: rgba(238, 56, 83, 0.3);
  background: linear-gradient(135deg, rgba(238, 56, 83, 0.18), rgba(238, 56, 83, 0.08));
  color: var(--accent-danger-strong);
}

.cover {
  justify-content: space-between;
}

.cover h1 {
  max-width: 48rem;
  font-size: 4.45rem;
}

.cover .lede {
  max-width: 36rem;
}

.section {
  justify-content: center;
}

.section h1 {
  max-width: 42rem;
  font-size: 4.9rem;
}

.section p {
  max-width: 28rem;
  color: var(--muted);
}

.split,
.columns {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 1.5rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  min-height: 10.5rem;
  padding: 1.2rem 1.2rem 1.1rem;
  border-radius: 1.15rem;
  border: 1px solid rgba(255, 102, 0, 0.18);
  background: linear-gradient(180deg, rgba(8, 12, 18, 0.9), rgba(5, 7, 10, 0.96));
  backdrop-filter: blur(12px);
}

.card h3 {
  margin-bottom: 0.8rem;
  color: var(--text);
}

.card p,
.card li {
  font-size: 1.06rem;
  color: var(--muted);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.stack-end {
  margin-top: auto;
}

.callout {
  padding: 1rem 1.15rem;
  border-radius: 1rem;
  border: 1px solid rgba(92, 60, 255, 0.24);
  background: linear-gradient(135deg, rgba(92, 60, 255, 0.14), rgba(92, 60, 255, 0.06));
}

.callout p,
.callout li {
  font-size: 1.06rem;
}

.callout.warning {
  border-color: rgba(255, 102, 0, 0.26);
  background: linear-gradient(135deg, rgba(255, 102, 0, 0.16), rgba(255, 102, 0, 0.08));
}

.callout.danger,
.callout.alert {
  border-color: rgba(238, 56, 83, 0.28);
  background: linear-gradient(135deg, rgba(238, 56, 83, 0.18), rgba(238, 56, 83, 0.08));
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: auto;
}

.stat {
  padding: 1.15rem 1.2rem;
  border-radius: 1rem;
  border: 1px solid rgba(255, 102, 0, 0.2);
  background: linear-gradient(180deg, rgba(8, 12, 18, 0.94), rgba(4, 6, 10, 1));
}

.stat strong {
  display: block;
  font-size: 2.7rem;
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--accent-primary-strong);
}

.stat span {
  display: block;
  margin-top: 0.55rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.quote {
  max-width: 44rem;
  font-size: 2.4rem;
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.muted {
  color: var(--muted);
}

.accent-primary {
  color: var(--accent-primary);
}

.accent-secondary {
  color: var(--accent-secondary-strong);
}

.accent-warning {
  color: var(--accent-primary-strong);
}

.accent-danger,
.danger,
.critical,
.alert {
  color: var(--accent-danger-strong);
}

.tight li + li {
  margin-top: 0.25rem;
}

.comment {
  width: min(100%, var(--slide-width));
  max-width: none;
  margin: 0 2.25rem 2rem 0;
  padding: 1.15rem 1.4rem;
  color: var(--surface-note-text);
  background: var(--surface-note);
  border: 1px dashed var(--surface-note-line);
  border-radius: 1rem;
  backdrop-filter: blur(8px);
}

.comment h2,
.comment h3 {
  margin-bottom: 0.6rem;
  color: var(--accent-secondary-strong);
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.comment p,
.comment li {
  font-size: 1rem;
  color: inherit;
}

body.has-2nd-window .slide,
body.has-2nd-window .comment {
  transition:
    opacity 180ms ease,
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    filter 180ms ease;
}

body.has-2nd-window .slide,
body.has-2nd-window .comment {
  opacity: 0.34;
  filter: saturate(0.7);
}

body.has-2nd-window .slide.active,
body.has-2nd-window .slide.active + .comment,
body.has-2nd-window .slide.active + .slide,
body.has-2nd-window .slide.active + .comment + .slide {
  opacity: 1;
  filter: none;
}

body.has-2nd-window .slide.active,
body.has-2nd-window .slide.active + .comment,
body.has-2nd-window .slide.active + .slide,
body.has-2nd-window .slide.active + .comment + .slide {
  scroll-margin-top: 6rem;
}

body.has-2nd-window .slide.active {
  border-color: rgba(255, 102, 0, 0.34);
  box-shadow:
    0 1.4rem 3rem rgba(0, 0, 0, 0.36),
    0 0 0 1px rgba(255, 102, 0, 0.16),
    inset 0 0 0 1px rgba(255, 102, 0, 0.1);
}

body.has-2nd-window .slide.active + .comment {
  border-color: rgba(255, 102, 0, 0.24);
  background:
    linear-gradient(180deg, rgba(255, 102, 0, 0.08), rgba(255, 102, 0, 0)),
    var(--surface-note);
  box-shadow:
    0 1rem 2.2rem rgba(0, 0, 0, 0.24),
    inset 0 0 0 1px rgba(255, 102, 0, 0.06);
}

body.has-2nd-window .slide.active + .slide,
body.has-2nd-window .slide.active + .comment + .slide {
  border-color: rgba(92, 60, 255, 0.28);
  box-shadow:
    0 1rem 2.2rem rgba(0, 0, 0, 0.28),
    inset 0 0 0 1px rgba(92, 60, 255, 0.08);
}

body.has-2nd-window .b6-ui {
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow:
    0 14px 28px rgba(0, 0, 0, 0.28),
    inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

body.has-2nd-window .b6-secondwindowbutton {
  background:
    linear-gradient(135deg, rgba(255, 102, 0, 0.2), rgba(92, 60, 255, 0.2)),
    rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.14);
}

.progress {
  display: none;
}

.full {
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--slide-width);
  height: var(--slide-height);
  margin: 0;
  overflow: hidden;
  background: #000000;
  transform: translate(-50%, -50%) scale(var(--shower-full-scale, 1));
  transform-origin: center center;
}

.full .slide {
  position: absolute;
  inset: 0;
  min-height: 0;
  height: 100%;
  margin: 0;
  visibility: hidden;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.full .slide.active {
  visibility: visible;
}

.full .comment {
  display: none;
}

.full .progress {
  display: block;
  position: absolute;
  inset: 0 auto auto 0;
  height: 0.28rem;
  width: 0;
  z-index: 30;
  background: linear-gradient(90deg, #ff6600 0%, #5c3cff 100%);
  box-shadow: 0 0 1rem rgba(255, 102, 0, 0.3);
}

.full .b6-ui {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  max-width: none;
  margin: 0;
  padding: 0.85rem max(1rem, env(safe-area-inset-left)) 0.85rem
    max(1rem, env(safe-area-inset-right));
  transform: none;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background:
    linear-gradient(180deg, rgba(7, 10, 15, 0.66), rgba(2, 4, 8, 0.78)),
    radial-gradient(circle at top right, rgba(255, 102, 0, 0.1), transparent 10rem);
  box-shadow:
    0 10px 22px rgba(0, 0, 0, 0.22),
    inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.full .b6-ui button {
  min-height: 2.3rem;
  padding: 0.5rem 0.8rem;
  font-size: 0.88rem;
}

.full .incremental > :not(.active):not(.visited),
.full .overlay > :not(.active):not(.visited),
.full .next:not(.active):not(.visited) {
  opacity: 0;
  transform: translateY(0.65rem);
}

.full .incremental > *,
.full .overlay > *,
.full .next {
  transition: opacity 180ms ease, transform 180ms ease;
}

.full :visited {
  color: inherit;
}

.slide h1 {
  max-width: 50rem;
}

.title-slide {
  justify-content: space-between;
}

.title-slide h1 {
  max-width: 51rem;
  font-size: 4.35rem;
  line-height: 1.06;
}

.title-meta {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) auto;
  gap: 1.15rem;
  align-items: end;
  max-width: 49rem;
}

.title-meta p {
  margin: 0;
}

.title-speaker {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 0 0;
  border-top: 1px solid rgba(255, 179, 128, 0.22);
}

.title-name {
  font-size: 1.75rem;
  line-height: 1.05;
  letter-spacing: -0.04em;
  font-weight: 650;
  color: var(--text);
}

.title-role {
  max-width: 31rem;
  font-size: 1.02rem;
  line-height: 1.45;
  color: var(--muted);
}

.title-event {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 13rem;
  padding: 0.95rem 1rem 0.9rem;
  border: 1px solid rgba(255, 102, 0, 0.18);
  border-radius: 1rem;
  background:
    linear-gradient(180deg, rgba(10, 14, 20, 0.92), rgba(5, 8, 12, 0.98)),
    radial-gradient(circle at top right, rgba(255, 102, 0, 0.12), transparent 12rem);
  box-shadow: inset 0 0 0 1px rgba(255, 102, 0, 0.08);
}

.title-event-name {
  font-size: 1.42rem;
  line-height: 1.1;
  letter-spacing: -0.04em;
  font-weight: 650;
  color: var(--text);
}

.title-event-city {
  font-size: 0.92rem;
  line-height: 1.2;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-primary-strong);
}

.chapter-slide {
  justify-content: center;
}

.chapter-slide h1 {
  max-width: 46rem;
}

.agenda-list {
  margin: auto 0;
  padding-left: 1.7rem;
}

.agenda-list li {
  font-size: 1.78rem;
  line-height: 1.4;
}

.agenda-list li + li {
  margin-top: 0.8rem;
}

.media-slide {
  gap: 1rem;
}

.media-slide h1 {
  font-size: 2.35rem;
}

.media-frame {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: center;
  min-height: 0;
  padding: 0.9rem;
  overflow: hidden;
  border-radius: 1.35rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    linear-gradient(180deg, rgba(9, 13, 19, 0.96), rgba(4, 7, 12, 1)),
    radial-gradient(circle at top right, rgba(255, 102, 0, 0.1), transparent 18rem);
  box-shadow: inset 0 0 0 1px rgba(255, 102, 0, 0.08);
}

.media-frame img,
.media-frame video {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  border-radius: 0.95rem;
}

.media-frame video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000000;
}

.feature-slide {
  gap: 1.1rem;
}

.feature-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: 1.35rem;
  flex: 1 1 auto;
  min-height: 0;
}

.feature-copy {
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
}

.feature-copy .lead {
  font-size: 1.34rem;
  line-height: 1.58;
  color: var(--text);
}

.feature-copy p {
  color: var(--muted);
}

.visual-panel {
  min-height: 0;
}

.visual-panel .media-frame {
  height: 100%;
}

.statement-slide {
  gap: 1rem;
}

.statement-panel {
  padding: 1.35rem 1.45rem;
  border-radius: 1.25rem;
  border: 1px solid rgba(255, 102, 0, 0.18);
  background:
    linear-gradient(180deg, rgba(10, 14, 20, 0.96), rgba(5, 8, 12, 1)),
    radial-gradient(circle at top right, rgba(255, 102, 0, 0.12), transparent 18rem);
}

.statement-panel p + p {
  margin-top: 0.95rem;
}

.statement-panel p {
  font-size: 1.28rem;
  line-height: 1.62;
  color: var(--text);
}

.statement-large p {
  font-size: 1.36rem;
}

.statement-only {
  justify-content: center;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.support-grid .card {
  min-height: 0;
}

.support-grid .card p,
.support-grid .card li {
  font-size: 1rem;
}

.philosophy-list {
  justify-content: center;
}

.principle {
  padding: 1.1rem 1.15rem;
  border-radius: 1.1rem;
  border: 1px solid rgba(255, 102, 0, 0.18);
  background: linear-gradient(180deg, rgba(8, 12, 18, 0.92), rgba(5, 7, 10, 0.98));
}

.principle p {
  font-size: 1.04rem;
  line-height: 1.6;
  color: var(--text);
}

.thesis-panel {
  padding: 1rem 1.15rem;
  border-radius: 1rem;
  border: 1px solid rgba(92, 60, 255, 0.24);
  background: linear-gradient(135deg, rgba(92, 60, 255, 0.14), rgba(92, 60, 255, 0.05));
}

.thesis-panel p {
  font-size: 1.28rem;
  line-height: 1.58;
  color: var(--text);
}

.rebuild-slide {
  gap: 0.95rem;
}

.rebuild-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  flex: 1 1 auto;
  min-height: 0;
}

.rebuild-grid .card {
  min-height: 0;
}

.rebuild-grid .card p,
.rebuild-grid .card li {
  font-size: 0.93rem;
  line-height: 1.48;
}

.small-copy p,
.small-copy li {
  font-size: 1rem;
  line-height: 1.52;
}

.micro-copy p,
.micro-copy li {
  font-size: 0.93rem;
  line-height: 1.46;
}

.compact-title h1 {
  font-size: 2.18rem;
  line-height: 1.08;
}

.long-title h1 {
  max-width: 51rem;
  font-size: 2.08rem;
  line-height: 1.08;
}

.chapter-slide.long-title h1 {
  font-size: 3.9rem;
}

.make-the-web-spatial-slide,
[id^="make-the-web-spatial-too-"] {
  gap: 0.65rem;
  padding-top: 2.35rem;
  padding-bottom: 2.2rem;
}

[id^="make-the-web-spatial-too-"] .eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
}

[id^="make-the-web-spatial-too-"] h1 {
  font-size: 1.9rem;
  line-height: 1.06;
}

[id^="make-the-web-spatial-too-"] .media-frame {
  padding: 0.55rem;
}

#what-is-webspatial-2 {
  gap: 0.8rem;
}

#what-is-webspatial-2 .statement-panel {
  padding: 1rem 1.1rem;
}

#what-is-webspatial-2 .statement-large p {
  font-size: 1.18rem;
  line-height: 1.54;
}

#what-is-webspatial-2 .statement-panel p + p {
  margin-top: 0.75rem;
}

#webspatial-philosophy {
  gap: 0.95rem;
}

#webspatial-philosophy .feature-layout {
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: 1rem;
}

#webspatial-philosophy .principle {
  padding: 0.95rem 1rem;
}

#webspatial-philosophy .principle p {
  font-size: 0.96rem;
  line-height: 1.5;
}

#webspatial-philosophy .media-frame {
  padding: 0.6rem;
}

.community-slide {
  gap: 1.25rem;
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  flex: 1 1 auto;
  min-height: 0;
  align-content: center;
}

.qr-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 0;
  gap: 1rem;
  padding: 1.15rem 1rem;
}

.qr-card picture {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.qr-card img {
  display: block;
  width: 100%;
  max-width: 14rem;
  height: auto;
  object-fit: contain;
  border-radius: 1rem;
  background: #ffffff;
}

.qr-card p {
  font-size: 1.02rem;
  line-height: 1.35;
  text-align: center;
  color: var(--text);
}

body.darkmode {
  color-scheme: dark;
  --canvas: #000000;
  --canvas-primary: rgba(255, 102, 0, 0.2);
  --canvas-secondary: rgba(92, 60, 255, 0.16);
  --canvas-danger: rgba(238, 56, 83, 0.09);
  --paper: #020304;
  --paper-strong: #06090d;
  --text: #f4f8ff;
  --headline: #FF6600;
  --muted: #a9b5c7;
  --line: rgba(255, 102, 0, 0.24);
  --line-strong: rgba(92, 60, 255, 0.22);
  --accent-primary: #FF6600;
  --accent-primary-strong: #FFC299;
  --accent-primary-soft: rgba(255, 102, 0, 0.18);
  --accent-secondary: #5C3CFF;
  --accent-secondary-strong: #D8CEFF;
  --accent-secondary-soft: rgba(92, 60, 255, 0.18);
  --accent-danger: #EE3853;
  --accent-danger-strong: #FFB3BF;
  --accent-danger-soft: rgba(238, 56, 83, 0.2);
  --code-bg: #01040a;
  --code-fg: #eef6ff;
  --shadow: 0 28px 64px rgba(0, 0, 0, 0.52);
}

body.darkmode .slide {
  background:
    radial-gradient(circle at top right, rgba(255, 102, 0, 0.2), rgba(255, 102, 0, 0) 22rem),
    radial-gradient(circle at bottom left, rgba(92, 60, 255, 0.14), rgba(92, 60, 255, 0) 18rem),
    radial-gradient(circle at center right, rgba(238, 56, 83, 0.1), rgba(238, 56, 83, 0) 16rem),
    linear-gradient(180deg, rgba(4, 7, 11, 0.98), rgba(1, 3, 5, 1)),
    var(--paper);
}

body.darkmode code {
  background: rgba(92, 60, 255, 0.16);
}

body.darkmode .card,
body.darkmode .stat {
  background: linear-gradient(180deg, rgba(7, 11, 16, 0.94), rgba(2, 4, 7, 1));
}

@media (max-width: 75rem) {
  html {
    font-size: 14px;
  }

  body {
    --page-gutter: 1.25rem;
  }

  .b6-ui {
    margin-bottom: 1rem;
  }

  .slide,
  .comment {
    margin-right: 0;
  }
}

@media (max-width: 60rem) {
  .split,
  .columns,
  .cards,
  .stat-grid,
  .qr-grid {
    grid-template-columns: 1fr;
  }

  .cover h1,
  .section h1 {
    font-size: 3.8rem;
  }

  .b6-ui {
    padding: 0.7rem var(--page-gutter);
  }

  .b6-ui button {
    flex: 1 1 calc(50% - 0.4rem);
    justify-content: center;
  }
}

@media print {
  @page {
    size: landscape;
    /* 60rem x 33.75rem at the default 16px root font size = 10in x 5.625in. */
    size: 10in 5.625in;
    margin: 0;
  }

  html,
  body {
    margin: 0;
    background: transparent;
  }

  body {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .has-print-deck-url {
    padding-bottom: 3.35rem;
  }

  .slide {
    display: flex;
    width: 10in;
    max-width: none;
    height: 5.625in;
    min-height: 0;
    margin: 0;
    border-radius: 0;
    box-shadow: none;
    page-break-after: always;
    break-after: page;
    break-inside: avoid-page;
    page-break-inside: avoid;
  }

  .slide:last-child {
    page-break-after: auto;
    break-after: auto;
  }

  .slide + .slide {
    page-break-before: always;
    break-before: page;
  }

  .print-page-break {
    display: block;
    height: 0;
    margin: 0;
    padding: 0;
    border: 0;
    page-break-before: always;
    break-before: page;
  }

  .print-deck-url {
    display: block;
    position: absolute;
    left: 2.35rem;
    right: 2.35rem;
    bottom: 1rem;
    margin: 0;
    color: rgba(237, 244, 255, 0.82);
    font-size: 0.78rem;
    line-height: 1.35;
    letter-spacing: 0.01em;
    overflow-wrap: anywhere;
  }

  .print-deck-url a {
    color: inherit;
    text-decoration: none;
  }

  .qr-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .comment,
  .progress,
  .b6-ui {
    display: none !important;
  }
}