:root {
  --paper: #f4efe6;
  --paper-deep: #ebe3d4;
  --ivory: #f7f2ea;
  --charcoal: #1a1714;
  --near-black: #0e0c0b;
  --oxblood: #5c2a2d;
  --rust: #8a4a32;
  --blue-gray: #5d676f;
  --brass: #b08a4a;
  --archive: #8a8378;
  --ink: #1a1714;
  --ink-soft: #5a534b;
  --rule: #c8bfb1;
  --focus: #1a1714;
  --paper-night: #12100e;
  --ink-night: #f3eee4;

  --gutter: 1.25rem;
  --rail: 0px;
  --bar: 3.4rem;
  --width-full: 100vw;
  --width-wide: min(92vw, 88rem);
  --width-editorial: min(42rem, 92vw);
  --width-narrow: min(28rem, 88vw);
  --width-caption: min(22rem, 80vw);

  --space-xs: 0.7rem;
  --space-s: 1.25rem;
  --space-m: 2.25rem;
  --space-l: 3.25rem;
  --space-xl: 5rem;
  --space-xxl: 7rem;

  --font-display: "Fraunces", "Palatino Linotype", Palatino, serif;
  --font-body: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", serif;
  --font-meta: "Gill Sans", "Gill Sans MT", "Trebuchet MS", "Segoe UI", sans-serif;

  --fs-display: clamp(3.4rem, 11vw, 7.5rem);
  --fs-chapter: clamp(2.2rem, 5.5vw, 4.4rem);
  --fs-section: clamp(2rem, 4.5vw, 3.4rem);
  --fs-body: 1.125rem;
  --fs-caption: 0.8125rem;
  --fs-meta: 0.6875rem;
  --fs-timeline: 0.6875rem;

  --ease-editorial: cubic-bezier(0.22, 0.61, 0.36, 1);
  --duration-fast: 180ms;
  --duration-medium: 420ms;
  --duration-slow: 900ms;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  scroll-padding-bottom: var(--bar);
}

html.reduce-motion,
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.62;
  font-weight: 400;
  padding-left: var(--rail);
  padding-bottom: var(--bar);
  transition: background-color 700ms var(--ease-editorial), color 700ms var(--ease-editorial);
}

body.is-night {
  background: var(--paper-night);
  color: var(--ink-night);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  background: var(--ink);
  color: var(--paper);
  padding: 0.4rem 0.7rem;
  z-index: 40;
}

.skip-link:focus {
  top: 0.75rem;
}

.hp {
  position: absolute;
  left: -9999px;
  height: 0;
  overflow: hidden;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Timeline */

.timeline {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
}

.timeline-toggle {
  display: flex;
  width: 100%;
  justify-content: space-between;
  align-items: center;
  border: 0;
  background: transparent;
  color: inherit;
  font-family: var(--font-meta);
  font-size: var(--fs-timeline);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.75rem var(--gutter);
}

.timeline-now {
  display: flex;
  gap: 0.8rem;
  align-items: baseline;
}

.timeline-toggle::after {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  border-right: 1px solid var(--archive);
  border-bottom: 1px solid var(--archive);
  transform: rotate(45deg);
  margin-top: -0.2rem;
}

.timeline.is-open .timeline-toggle::after {
  transform: rotate(-135deg);
  margin-top: 0.15rem;
}

.timeline-progress {
  display: none;
}

.timeline-list {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0.4rem var(--gutter) 0.9rem;
  max-height: min(62vh, 28rem);
  overflow: auto;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 100%;
  background: var(--paper);
}

.timeline.is-open .timeline-list {
  display: grid;
  gap: 0.05rem;
}

.timeline a {
  display: grid;
  grid-template-columns: 5.2rem 1fr;
  gap: 0.6rem;
  text-decoration: none;
  font-family: var(--font-meta);
  font-size: var(--fs-timeline);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.4rem 0;
  color: var(--archive);
}

.timeline a[aria-current="true"] {
  color: var(--ink);
}

.timeline-date {
  font-variant-numeric: tabular-nums;
}

/* Hero */

.opening {
  position: relative;
  isolation: isolate;
  min-height: 100svh;
  overflow: hidden;
  color: var(--ivory);
}

.opening-media {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.opening-media img {
  width: 100%;
  height: 120%;
  object-fit: cover;
  object-position: 68% 16%;
  transform: scale(1.04);
  animation: heroDrift 22s var(--ease-editorial) alternate infinite;
}

.opening-veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(to top, rgba(14, 12, 11, 0.82) 0%, rgba(14, 12, 11, 0.2) 42%, transparent 68%),
    linear-gradient(to right, rgba(14, 12, 11, 0.55) 0%, rgba(14, 12, 11, 0.12) 42%, transparent 70%);
}

.opening-stage {
  position: relative;
  z-index: 2;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 5.5rem var(--gutter) 4.5rem;
  max-width: 32rem;
  animation: riseIn 1.2s var(--ease-editorial) both;
}

.opening-name {
  font-family: var(--font-display);
  font-size: var(--fs-display);
  font-weight: 500;
  line-height: 0.86;
  letter-spacing: -0.045em;
  margin: 0 0 0.6rem;
}

.opening-places,
.opening-cue {
  font-family: var(--font-meta);
  font-size: var(--fs-meta);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin: 0 0 1rem;
  color: color-mix(in srgb, var(--ivory) 72%, var(--brass));
}

.opening-subtitle,
.opening-kicker {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 600;
  font-size: 1.05rem;
  margin: 0 0 1.1rem;
}

.opening-line {
  max-width: var(--width-narrow);
  font-size: 0.98rem;
  line-height: 1.5;
  color: color-mix(in srgb, var(--ivory) 88%, var(--paper));
}

.opening-line p {
  margin: 0;
}

.opening-cue {
  display: inline-block;
  margin-top: 2.4rem;
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--brass) 70%, transparent);
  padding-bottom: 0.25rem;
  width: max-content;
}

/* Who was Ida */

.overview {
  position: relative;
  background: var(--ivory);
  color: var(--ink);
}

.overview-stage {
  display: block;
}

.overview-item {
  display: grid;
  gap: 1.25rem;
  align-items: center;
  padding: 2.25rem var(--gutter);
  min-height: 0;
}

.overview-media {
  margin: 0;
  overflow: hidden;
  height: min(58svh, 28rem);
  background: var(--paper-deep);
}

.overview-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.overview-copy {
  max-width: 28rem;
}

.overview-body {
  margin: 0.9rem 0 0;
  color: var(--ink-soft);
  font-size: 1.02rem;
  line-height: 1.5;
}

.overview-display {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin: 0 0 0.45rem;
  color: var(--oxblood);
}

.overview-item:nth-child(2) .overview-display {
  color: var(--charcoal);
}

.overview-item:nth-child(3) .overview-display {
  color: var(--blue-gray);
}

.overview-item:nth-child(4) .overview-display {
  color: var(--rust);
}

.overview-support {
  margin: 0;
  max-width: 16rem;
  font-size: 1.05rem;
  color: var(--ink-soft);
}

/* Chapters */

main {
  padding: 0;
}

.chapter {
  position: relative;
  max-width: none;
  padding: 0;
  border: 0;
  scroll-margin-top: 0.5rem;
  background: var(--paper);
  color: var(--ink);
}

.chapter-stage {
  position: relative;
}

.chapter-header {
  padding: var(--space-l) var(--gutter) var(--space-s);
  max-width: var(--width-editorial);
}

.chapter-marker {
  display: flex;
  gap: 0.85rem;
  align-items: baseline;
  margin: 0 0 0.85rem;
  font-family: var(--font-meta);
  font-size: var(--fs-meta);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--archive);
}

.chapter-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-chapter);
  line-height: 0.92;
  letter-spacing: -0.035em;
  margin: 0 0 0.6rem;
}

.chapter-kicker {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 600;
  font-size: 1.15rem;
  margin: 0;
  max-width: 24rem;
  color: var(--ink-soft);
}

.chapter-beats {
  display: flex;
  flex-direction: column;
}

.beat-text,
.beat-quote,
.beat-context {
  max-width: var(--width-editorial);
  padding: var(--space-m) var(--gutter) var(--space-l);
}

.prose p,
.beat-quote blockquote p {
  margin: 0 0 1em;
  hyphens: auto;
}

.prose p:last-child,
.beat-quote blockquote p:last-child {
  margin-bottom: 0;
}

/* Pattern A — full bleed */

.pattern-bleed {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  color: var(--ivory);
}

.bleed-media {
  position: absolute;
  inset: 0;
}

.bleed-media img {
  width: 100%;
  height: 120%;
  object-fit: cover;
}

.bleed-copy {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 4rem var(--gutter) 4.5rem;
  background: linear-gradient(to top, rgba(14, 12, 11, 0.7), transparent 52%);
}

.bleed-kicker,
.bleed-caption {
  font-family: var(--font-meta);
  font-size: var(--fs-meta);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin: 0;
}

.bleed-title {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.4rem, 7vw, 5.5rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  max-width: 12ch;
}

.bleed-caption {
  margin-top: 0.7rem;
  max-width: 26rem;
  letter-spacing: 0.04em;
  text-transform: none;
  font-size: var(--fs-caption);
  line-height: 1.4;
}

.composition-bleed .chapter-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100svh;
  z-index: 3;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: var(--ivory);
  padding: 0 var(--gutter) 8vh;
  max-width: none;
  pointer-events: none;
}

.composition-bleed .chapter-marker,
.composition-bleed .chapter-kicker {
  color: color-mix(in srgb, var(--ivory) 70%, var(--brass));
}

.composition-bleed .chapter-title {
  color: var(--ivory);
  text-shadow: 0 12px 40px rgba(14, 12, 11, 0.45);
}

.composition-bleed .pattern-bleed:first-child .bleed-copy {
  background: linear-gradient(to top, rgba(14, 12, 11, 0.62), transparent 50%);
}

.composition-bleed .pattern-bleed:first-child .bleed-kicker,
.composition-bleed .pattern-bleed:first-child .bleed-title {
  display: none;
}

#ch-origins .beat-text,
#ch-recognition .beat-text,
#ch-taipei .beat-text {
  max-width: var(--width-narrow);
  padding: var(--space-xl) var(--gutter) var(--space-xxl);
}

.composition-voice {
  min-height: 100svh;
}

.composition-voice .chapter-header {
  padding-top: var(--space-xl);
}

.composition-voice .beat-text {
  max-width: var(--width-narrow);
  padding-bottom: var(--space-xxl);
}

.composition-voice .prose p:first-child {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.35;
}

.composition-narrow .chapter-header {
  padding-top: var(--space-xl);
}

.composition-narrow .chapter-title {
  font-size: clamp(2.4rem, 6vw, 4.8rem);
}

.composition-narrow .beat-text {
  max-width: var(--width-narrow);
  padding-bottom: var(--space-xxl);
}

.composition-scale .kind-newspaper,
.composition-split .kind-newspaper,
.composition-split .kind-photograph {
  padding: 0 var(--gutter) var(--space-l);
}

#ch-east64th .beat-text {
  max-width: var(--width-narrow);
}

#ch-east64th .kind-telegram {
  padding: 0 var(--gutter) var(--space-xxl);
}

/* Pattern G / B — document */

.composition-document .chapter-header,
.composition-document-dark .chapter-header {
  max-width: none;
  padding-bottom: var(--space-m);
}

.composition-document .kind-document,
.composition-document-dark .kind-document,
.composition-document .kind-patent,
.composition-document-dark .kind-patent,
.composition-document .kind-telegram {
  max-width: min(46rem, 94vw);
  padding: 0 var(--gutter) var(--space-l);
}

.composition-document .beat-text {
  max-width: var(--width-narrow);
}

.composition-document .kind-portrait {
  max-width: 18rem;
  margin: 0 var(--gutter) var(--space-xl) auto;
}

/* Pattern C — floating artifact */

.composition-float .beat-text {
  max-width: var(--width-narrow);
}

.composition-float .kind-object {
  max-width: min(28rem, 86vw);
  margin: 0 var(--gutter) var(--space-xl) auto;
}

.composition-epilogue {
  background: var(--paper-deep);
}

.composition-epilogue .chapter-header {
  padding-top: var(--space-xl);
  padding-bottom: 0;
}

.composition-epilogue .chapter-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
}

.composition-epilogue .kind-legacy {
  max-width: min(42rem, 92vw);
  margin: var(--space-m) var(--gutter);
}

.composition-epilogue .kind-legacy .artifact-frame {
  background: #fff;
  padding: clamp(1.5rem, 4vw, 3.2rem) clamp(1.6rem, 5vw, 4rem);
}

.composition-epilogue .kind-legacy img {
  width: 100%;
  height: auto;
  filter: none;
}

.composition-epilogue .beat-text {
  max-width: var(--width-editorial);
  padding-top: var(--space-s);
}

/* Pattern E — dark */

.is-dark,
.composition-dark,
.composition-document-dark {
  background: var(--near-black);
  color: var(--ink-night);
}

.is-dark .chapter-marker,
.is-dark .chapter-kicker,
.is-dark .artifact-caption {
  color: var(--archive);
}

.is-dark .chapter-title {
  color: var(--ivory);
}

#ch-paris {
  background: color-mix(in srgb, var(--charcoal) 92%, var(--oxblood));
  color: var(--ink-night);
}

#ch-paris .chapter-marker,
#ch-paris .chapter-kicker {
  color: color-mix(in srgb, var(--archive) 70%, var(--ivory));
}

.composition-dark .kind-portrait {
  padding: 0;
  max-width: none;
}

.composition-dark .kind-portrait .artifact-frame {
  overflow: hidden;
}

.composition-dark .kind-portrait img {
  width: 100%;
  height: min(88svh, 54rem);
  object-fit: cover;
}

.composition-dark .beat-text {
  max-width: var(--width-narrow);
}

/* Pattern F — gallery */

.pattern-gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  padding: var(--space-l) var(--gutter) var(--space-xl);
  max-width: var(--width-wide);
  margin: 0 auto;
}

.pattern-gallery .beat-artifact {
  margin: 0;
  max-width: 22rem;
}

.pattern-gallery .beat-artifact:nth-child(2) {
  justify-self: end;
}

.pattern-gallery .beat-artifact:nth-child(3) {
  justify-self: center;
}

/* Artifacts */

.artifact-frame {
  position: relative;
  background: transparent;
  padding: 0;
}

.artifact-frame img {
  width: 100%;
}

.kind-document .artifact-frame,
.kind-newspaper .artifact-frame,
.kind-patent .artifact-frame,
.kind-telegram .artifact-frame {
  background: #fff;
  padding: 0.65rem;
  box-shadow: 0 28px 70px rgba(14, 12, 11, 0.22);
}

.kind-document img,
.kind-newspaper img,
.kind-patent img,
.kind-telegram img {
  box-shadow: none;
}

.kind-object img,
.kind-legacy img {
  filter: drop-shadow(0 22px 40px rgba(14, 12, 11, 0.18));
}

.kind-object {
  max-width: 24rem;
}

.kind-legacy {
  max-width: 18rem;
}

.kind-telegram {
  max-width: 32rem;
}

.artifact-caption {
  display: grid;
  gap: 0.25rem;
  margin-top: 0.75rem;
  font-family: var(--font-meta);
  font-size: var(--fs-caption);
  letter-spacing: 0.02em;
  color: var(--ink-soft);
  max-width: var(--width-caption);
}

.patent-phrase {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.7rem, 4vw, 2.8rem);
  line-height: 1.15;
  margin: 1.25rem 0 0;
  max-width: 18rem;
}

.artifact-zoom {
  position: absolute;
  right: 0.55rem;
  bottom: 0.45rem;
  border: 0;
  background: transparent;
  color: var(--archive);
  font-family: var(--font-meta);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0;
  cursor: zoom-in;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-editorial);
}

[data-viewer] .artifact-frame {
  cursor: zoom-in;
}

[data-viewer] .artifact-frame:hover .artifact-zoom,
[data-viewer] .artifact-frame:focus-visible .artifact-zoom,
[data-viewer] .artifact-zoom:focus-visible {
  opacity: 1;
}

.beat-quote blockquote {
  margin: 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--fs-section);
  line-height: 1.25;
}

/* Sources / contact / footer */

.sources,
.contact {
  max-width: min(58rem, 92vw);
  margin: 0;
  padding: var(--space-l) var(--gutter) var(--space-m);
}

.sources h2,
.contact h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0 0 0.6rem;
}

.sources-intro {
  max-width: 36rem;
  color: var(--ink-soft);
  margin: 0 0 1.2rem;
}

.source-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.source-list li {
  display: grid;
  gap: 0.15rem;
  padding: 0.55rem 0;
  border-top: 1px solid var(--rule);
  font-size: 0.92rem;
  line-height: 1.45;
}

.source-year {
  font-family: var(--font-meta);
  font-size: var(--fs-meta);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--archive);
}

.contact-form {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.contact-form label span {
  display: block;
  font-family: var(--font-meta);
  font-size: var(--fs-meta);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--rule);
  background: transparent;
  color: var(--ink);
  font: inherit;
  padding: 0.55rem 0;
}

.contact-form button {
  justify-self: start;
  border: 0;
  border-bottom: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-family: var(--font-meta);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.75rem;
  padding: 0.6rem 0;
  cursor: pointer;
}

.form-status {
  padding: 0.7rem 0;
}

.site-footer {
  padding: var(--space-l) var(--gutter) var(--space-xl);
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.footer-mark {
  font-family: var(--font-display);
  color: var(--ink);
}

#ch-reborn {
  background: var(--paper-deep);
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translate3d(0, 22px, 0);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes heroDrift {
  from {
    transform: scale(1.04) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.1) translate3d(0, -2.4%, 0);
  }
}

@supports (animation-timeline: view()) {
  [data-motion="reveal"] {
    animation: riseIn 0.9s var(--ease-editorial) both;
    animation-timeline: view();
    animation-range: entry 8% entry 42%;
  }

  .overview-item {
    animation: riseIn 0.9s var(--ease-editorial) both;
    animation-timeline: view();
    animation-range: entry 0% entry 35%;
  }
}

html.has-motion .opening-stage,
html.has-motion .opening-media img,
html.has-motion [data-motion="reveal"],
html.has-motion .overview-item {
  animation: none;
}

/* Viewer */

.viewer {
  width: 100vw;
  height: 100vh;
  max-width: none;
  max-height: none;
  margin: 0;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--ivory);
}

.viewer::backdrop {
  background: rgba(10, 8, 7, 0.94);
}

.viewer form {
  position: absolute;
  top: 1.1rem;
  right: 1.2rem;
  z-index: 2;
}

.viewer-close {
  border: 0;
  background: transparent;
  color: var(--ivory);
  font-family: var(--font-meta);
  font-size: var(--fs-meta);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
}

.viewer img {
  max-width: 88vw;
  max-height: 82vh;
  margin: 8vh auto 0;
  box-shadow: 0 40px 90px rgba(0, 0, 0, 0.45);
}

.viewer-caption {
  max-width: 36rem;
  margin: 1rem auto 0;
  font-family: var(--font-meta);
  font-size: var(--fs-caption);
  color: var(--archive);
  text-align: center;
}

/* Remaining legacy helpers */

.register,
.later-stamp,
.beat-eyebrow,
.source-whisper,
.pattern-pause,
.pattern-statement,
.beat-absence,
.beat-transition,
.archive-panel {
  max-width: var(--width-editorial);
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.pattern-overlap {
  max-width: 26rem;
  padding: 0 var(--gutter) var(--space-l);
}

@media (max-width: 1099px) {
  .kind-document,
  .kind-newspaper,
  .kind-patent,
  .kind-telegram,
  .kind-photograph,
  .kind-portrait {
    max-width: none;
  }

  .kind-object,
  .kind-legacy {
    margin-left: auto;
    margin-right: auto;
  }

  .composition-dark .kind-portrait img {
    height: min(70svh, 34rem);
  }

  .overview-item {
    min-height: 0;
    padding: 3rem var(--gutter);
  }
}

@media (min-width: 720px) {
  :root {
    --gutter: 2.25rem;
    --fs-body: 1.2rem;
  }

  .opening-stage {
    max-width: 30rem;
    padding-bottom: 6rem;
  }

  .overview-item {
    grid-template-columns: minmax(0, 1.15fr) minmax(16rem, 0.85fr);
    gap: 2rem 5vw;
    padding: 5vh 6vw;
    min-height: 72svh;
    align-items: center;
  }

  .overview-item:nth-child(even) .overview-media {
    order: 2;
  }

  .overview-media {
    height: min(64svh, 38rem);
  }

  .pattern-gallery {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.8fr) minmax(0, 1fr);
    align-items: end;
    gap: 1.5rem 2rem;
  }

  .pattern-gallery .beat-artifact {
    max-width: none;
  }

  .pattern-gallery .beat-artifact:nth-child(1) {
    transform: translateY(-1.5rem);
  }

  .pattern-gallery .beat-artifact:nth-child(2) {
    margin-top: 7rem;
    justify-self: stretch;
  }

  .pattern-gallery .beat-artifact:nth-child(3) {
    margin-top: 2rem;
    max-width: 16rem;
  }
}

@media (min-width: 1100px) {
  :root {
    --rail: 10.5rem;
    --bar: 0px;
    --gutter: 3rem;
    --fs-body: 1.25rem;
  }

  body {
    padding-bottom: 0;
  }

  .timeline {
    top: 0;
    bottom: 0;
    right: auto;
    width: var(--rail);
    background: transparent;
    padding: 2.4rem 0 2rem 1.15rem;
  }

  .timeline-toggle {
    display: none;
  }

  .timeline-progress {
    display: block;
    position: absolute;
    left: 1.12rem;
    top: 2.6rem;
    bottom: 2.4rem;
    width: 1px;
    background: color-mix(in srgb, var(--rule) 70%, transparent);
    overflow: hidden;
  }

  .timeline-progress span {
    display: block;
    width: 100%;
    height: 100%;
    background: var(--oxblood);
    transform-origin: top center;
    transform: scaleY(0);
  }

  .timeline-list,
  .timeline.is-open .timeline-list {
    display: flex;
    flex-direction: column;
    position: relative;
    left: auto;
    right: auto;
    bottom: auto;
    padding: 0 0.8rem 0 1.1rem;
    max-height: none;
    overflow: visible;
    background: transparent;
    gap: 0;
  }

  .timeline a {
    grid-template-columns: 1fr;
    gap: 0.08rem;
    padding: 0.32rem 0;
    color: color-mix(in srgb, var(--archive) 55%, transparent);
  }

  .timeline-label {
    display: none;
  }

  .timeline a[aria-current="true"] {
    color: var(--ink);
  }

  .timeline a[aria-current="true"] .timeline-label {
    display: block;
  }

  body.is-night .timeline a {
    color: color-mix(in srgb, var(--archive) 70%, transparent);
  }

  body.is-night .timeline a[aria-current="true"] {
    color: var(--ivory);
  }

  .opening-stage {
    max-width: 28rem;
    margin-left: 5vw;
    padding: 0 0 8vh;
    justify-content: flex-end;
  }

  .opening-media img {
    object-position: 78% 14%;
  }

  .opening-name {
    margin-left: -0.08em;
  }

  .composition-document .chapter-stage,
  .composition-document-dark .chapter-stage {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(18rem, 0.7fr);
    gap: 2rem 5vw;
    align-items: start;
    padding: var(--space-l) var(--gutter) var(--space-xxl);
    min-height: 100svh;
  }

  .composition-document .chapter-beats,
  .composition-document-dark .chapter-beats,
  .composition-float .chapter-beats,
  .composition-dark .chapter-beats,
  .composition-split .chapter-beats,
  .composition-epilogue .chapter-beats {
    display: contents;
  }

  .composition-document .chapter-header,
  .composition-document-dark .chapter-header {
    grid-column: 1 / -1;
    padding: 0 0 var(--space-s);
  }

  .composition-document .kind-document,
  .composition-document-dark .kind-document,
  .composition-document .kind-patent,
  .composition-document-dark .kind-patent,
  .composition-document .kind-telegram {
    grid-column: 1;
    grid-row: 2 / span 3;
    max-width: none;
    padding: 0;
    position: sticky;
    top: 8vh;
  }

  .composition-document .beat-text,
  .composition-document-dark .beat-text {
    grid-column: 2;
    padding: 0;
    max-width: 26rem;
  }

  .composition-document .kind-portrait {
    grid-column: 2;
    margin: 3rem 0 0 auto;
    max-width: 15rem;
  }

  .composition-float .chapter-stage {
    display: grid;
    grid-template-columns: minmax(20rem, 0.72fr) minmax(0, 1.1fr);
    gap: 2rem 6vw;
    align-items: start;
    padding: var(--space-l) var(--gutter) var(--space-xxl);
  }

  .composition-float .chapter-header {
    grid-column: 1 / -1;
    padding: 0 0 var(--space-s);
  }

  .composition-float .beat-text {
    grid-column: 1;
    padding: 0;
  }

  .composition-float .kind-object {
    grid-column: 2;
    max-width: 28rem;
    margin: 2rem 2vw 0 auto;
    position: sticky;
    top: 12vh;
  }

  .composition-epilogue .chapter-stage {
    display: grid;
    grid-template-columns: minmax(20rem, 0.8fr) minmax(0, 1fr);
    gap: 1.5rem 6vw;
    align-items: center;
    padding: var(--space-xl) var(--gutter) var(--space-xxl);
    min-height: 72svh;
  }

  .composition-epilogue .chapter-header {
    grid-column: 1;
    padding: 0;
  }

  .composition-epilogue .beat-text {
    grid-column: 1;
    padding: var(--space-s) 0 0;
  }

  .composition-epilogue .kind-legacy {
    grid-column: 2;
    grid-row: 1 / span 3;
    max-width: none;
    margin: 0;
  }

  .composition-dark .chapter-stage {
    display: grid;
    grid-template-columns: minmax(18rem, 0.7fr) minmax(0, 1.15fr);
    min-height: 100svh;
    gap: 2rem 4vw;
    padding: 0 var(--gutter) var(--space-xl);
    align-items: start;
  }

  .composition-dark .chapter-header {
    grid-column: 1;
    padding: var(--space-l) 0 0;
  }

  .composition-dark .kind-portrait {
    grid-column: 2;
    grid-row: 1 / span 3;
    position: sticky;
    top: 4vh;
  }

  .composition-dark .kind-portrait img {
    height: 92svh;
  }

  .composition-dark .beat-text {
    grid-column: 1;
    padding: var(--space-m) 0 var(--space-xl);
  }

  .composition-bleed .chapter-header {
    left: 6vw;
    right: auto;
    max-width: 28rem;
    padding: 0 0 8vh;
  }

  #ch-origins .beat-text,
  #ch-recognition .beat-text,
  #ch-taipei .beat-text {
    margin-left: 6vw;
    padding-top: var(--space-xxl);
  }

  .composition-scale .chapter-beats {
    display: flex;
    flex-direction: column;
  }

  .composition-scale .kind-newspaper {
    max-width: min(58rem, 72vw);
    margin: 0 0 var(--space-l) 6vw;
    padding: 0;
  }

  .composition-scale .kind-newspaper:nth-of-type(2) {
    margin-left: 22vw;
    transform: rotate(1.4deg);
  }

  .composition-scale .pattern-gallery {
    margin-left: 4vw;
  }

  .composition-split .chapter-stage {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(18rem, 0.75fr);
    gap: 2rem 5vw;
    align-items: start;
    padding: var(--space-l) var(--gutter) var(--space-xl);
  }

  .composition-split .chapter-header {
    grid-column: 1 / -1;
    padding-left: 0;
  }

  .composition-split .kind-newspaper {
    grid-column: 1;
    padding: 0;
    position: sticky;
    top: 8vh;
  }

  .composition-split .beat-text {
    grid-column: 2;
    padding: 0;
    max-width: 26rem;
  }

  .composition-split .kind-photograph,
  .composition-split .pattern-gallery {
    grid-column: 1 / -1;
    max-width: none;
    padding: var(--space-l) 0 0;
  }

  .composition-voice .chapter-header,
  .composition-narrow .chapter-header,
  .composition-voice .beat-text,
  .composition-narrow .beat-text {
    padding-left: 10vw;
  }

  .composition-document-dark .kind-patent:first-of-type {
    grid-column: 2;
    grid-row: 2;
    position: sticky;
    top: 10vh;
  }

  .composition-document-dark .kind-patent:last-of-type {
    grid-column: 1 / -1;
    grid-row: auto;
    max-width: 42rem;
    margin-top: var(--space-l);
    position: static;
  }

  .composition-document-dark .patent-phrase {
    font-size: clamp(2.2rem, 5vw, 4.2rem);
    max-width: 12ch;
  }

  #ch-east64th .chapter-stage {
    display: grid;
    grid-template-columns: minmax(16rem, 0.7fr) minmax(0, 1.1fr);
    gap: 2rem 6vw;
    align-items: start;
    padding: 0 var(--gutter) var(--space-xxl);
  }

  #ch-east64th .chapter-beats {
    display: contents;
  }

  #ch-east64th .chapter-header {
    grid-column: 1;
    padding: var(--space-xl) 0 0;
  }

  #ch-east64th .beat-text {
    grid-column: 1;
    padding: var(--space-m) 0 0;
  }

  #ch-east64th .kind-telegram {
    grid-column: 2;
    grid-row: 1 / span 3;
    padding: var(--space-l) 0 0;
    position: sticky;
    top: 10vh;
  }

  .sources,
  .contact,
  .site-footer {
    padding-left: 6vw;
  }

  .source-list {
    columns: 2;
    column-gap: 3.5rem;
  }

  .source-list li {
    break-inside: avoid;
  }
}

@media (prefers-reduced-motion: reduce) {
  html:not([data-force-motion="1"]) .artifact-frame img,
  html:not([data-force-motion="1"]) .patent-phrase,
  html:not([data-force-motion="1"]) .bleed-media img,
  html:not([data-force-motion="1"]) .opening-media img,
  html:not([data-force-motion="1"]) .overview-item,
  html:not([data-force-motion="1"]) .opening-stage,
  html:not([data-force-motion="1"]) [data-motion="reveal"] {
    transform: none !important;
    clip-path: none !important;
    animation: none !important;
  }

  html:not([data-force-motion="1"]) .overview-item {
    opacity: 1 !important;
  }

  .artifact-zoom {
    opacity: 1;
  }
}