:root {
  color-scheme: light;
  --paper: #f7f7f5;
  --ink: #0b0b0b;
  --muted: #666662;
  --line: #d3d3ce;
  --stage: #eeeee9;
  --gutter: clamp(1.25rem, 4.5vw, 4.5rem);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-synthesis: none;
  color: var(--ink);
  background: var(--paper);
  scroll-behavior: smooth;
}
* { box-sizing: border-box; }
body { margin: 0; text-rendering: optimizeLegibility; }
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible, video:focus-visible { outline: 2px solid #6354d9; outline-offset: 6px; }
img { display: block; width: 100%; height: auto; }
figure, p, h1, h2, h3 { margin: 0; }
button { font: inherit; cursor: pointer; }
.skip-link { position: fixed; z-index: 10; top: 1rem; left: 1rem; padding: .75rem 1rem; background: var(--ink); color: white; transform: translateY(-200%); }
.skip-link:focus { transform: none; }
.underlined { text-decoration: underline; text-underline-offset: .35em; }
.hero { display: grid; grid-template-columns: 1fr 1.1fr; align-items: center; gap: clamp(2rem, 5vw, 5rem); width: calc(100% - var(--gutter) * 2); max-width: 1440px; margin: 0 auto; padding: 3.5rem 1.5rem 3.5rem 4rem; }
h1 { font-size: clamp(5rem, 9vw, 9rem); font-weight: 300; letter-spacing: -.065em; line-height: 1; }
.hero-statement { margin-top: 2.5rem; font-size: clamp(1.8rem, 2.45vw, 2.6rem); letter-spacing: -.04em; line-height: 1.25; }
.intro { max-width: 28rem; margin-top: 2rem; font-size: 1.125rem; color: var(--muted); line-height: 1.6; letter-spacing: -.015em; }
.project-meta { display: flex; gap: 2rem; margin: 2.25rem 0 1.75rem; }
.project-meta dt { color: var(--muted); font-size: .6875rem; margin-bottom: .5rem; }
.project-meta dd { margin: 0; font-size: .8125rem; line-height: 1.5; }
.section-label, figcaption, .chapter-nav, .project-meta dt, .principle-line > span { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .6875rem; line-height: 1.5; letter-spacing: .035em; }
.section-label { margin-bottom: 1.75rem; }
.section-label-with-icon { display: flex; align-items: center; gap: .75rem; }
.section-icon { width: 1.25rem; height: 1.25rem; flex: 0 0 auto; }
.screen-stage { display: flex; justify-content: center; align-items: center; background: var(--stage); }
.hero-stage { padding: 1.75rem; min-height: 42rem; }
.screen-link { display: block; width: 100%; border-radius: 12.4% / 5.7%; }
.screen-link img { filter: drop-shadow(0 6px 9px rgb(0 0 0 / 8%)); }
[data-image] { cursor: zoom-in; }
.timeline { max-width: 18rem; }
figcaption { display: flex; justify-content: space-between; gap: 1rem; margin-top: .875rem; color: var(--muted); }
.chapter-nav { position: sticky; top: 0; z-index: 5; background: var(--paper); border-block: 1px solid var(--line); }
.chapter-nav-inner { display: flex; justify-content: space-between; gap: 2rem; max-width: 1200px; margin: 0 auto; padding: 0 var(--gutter); overflow-x: auto; scrollbar-width: none; }
.chapter-nav-inner::-webkit-scrollbar { display: none; }
.chapter-nav a { display: block; position: relative; flex: 0 0 auto; padding-block: 1.15rem; color: var(--muted); transition: color 150ms ease; }
.chapter-nav a:hover, .chapter-nav a[aria-current="location"] { color: var(--ink); }
.chapter-nav a[aria-current="location"]::after { position: absolute; content: ""; bottom: -1px; left: 0; right: 0; height: 2px; background: var(--ink); }
.chapter { width: calc(100% - var(--gutter) * 2); max-width: 1280px; margin-inline: auto; padding-block: clamp(4rem, 7vw, 7rem); scroll-margin-top: 3.5rem; }
.chapter + .chapter { border-top: 1px solid var(--line); }
h2 { font-size: clamp(2.35rem, 3.5vw, 3.5rem); font-weight: 400; letter-spacing: -.045em; line-height: 1.1; text-wrap: balance; }
h3 { font-size: 1.4rem; font-weight: 500; letter-spacing: -.035em; line-height: 1.25; text-wrap: balance; }
.prose p, .learning-notes p, .decision-list p, .details-grid article p, .motion-copy > p:last-child { color: var(--muted); font-size: 1.0625rem; line-height: 1.65; letter-spacing: -.012em; text-wrap: pretty; }
.prose p + p { margin-top: 1.5rem; }
.premise-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: clamp(2rem, 6vw, 6rem); }
.premise h2 { max-width: 23ch; }
.principle-line { display: grid; grid-template-columns: 1fr 2fr; align-items: baseline; gap: 2rem; margin-top: 3.5rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.principle-line > span { color: var(--muted); }
.principle-line p { font-size: clamp(1.35rem, 2vw, 1.9rem); letter-spacing: -.03em; line-height: 1.3; }
.split-section { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.65fr); gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.section-copy .prose { margin-top: 2rem; }
.change-notes { margin-top: 3rem; }
.change-notes .section-label { margin-bottom: 1rem; color: var(--muted); }
.change-notes ul { list-style: none; padding: 0; margin: 0; }
.change-notes li { padding-block: 1rem; font-size: .9375rem; line-height: 1.45; }
.change-notes li + li { border-top: 1px solid var(--line); }
.comparison-stage { gap: clamp(1.5rem, 4vw, 4rem); padding: clamp(1.5rem, 3vw, 3rem); border-radius: .75rem; }
.comparison-stage figure { width: min(46%, 17rem); min-width: 0; }
.comparison-stage figcaption { justify-content: center; text-align: center; margin-top: 1.5rem; font-family: inherit; letter-spacing: -.015em; font-size: .9375rem; }
.building-band { background: #eeeee9; scroll-margin-top: 3.5rem; }
.section-intro { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 6vw, 6rem); align-items: start; }
.wide-figure { margin-top: 3rem; }
.wide-figure img { border-radius: .5rem; }
.learning-notes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3rem; margin-top: 3rem; }
.learning-notes p { margin-top: 1rem; font-size: 1rem; }
.onboarding-section { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
.onboarding-stage { padding-block: 4rem; border-radius: 0; }
.decision-list { counter-reset: decision; list-style: none; margin: 3rem 0 0; padding: 0; }
.decision-list li { position: relative; padding: 1.4rem 0 1.4rem 3rem; border-top: 1px solid var(--line); counter-increment: decision; }
.decision-list li::before { position: absolute; left: 0; top: 1.4rem; content: "0" counter(decision); font-family: ui-monospace, monospace; font-size: .875rem; }
.decision-list h3 { font-size: 1.125rem; }
.decision-list p { margin-top: .65rem; font-size: .9375rem; }
.viewer-section { margin-top: clamp(5rem, 9vw, 9rem); }
.viewer-comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin-top: 3rem; }
.viewer-comparison .screen-stage { padding: 2.5rem; }
.viewer-comparison .screen-link { max-width: 18rem; }
.viewer-comparison figure:last-child .screen-stage { background: #e8e8e4; }
.details-section { margin-top: clamp(5rem, 9vw, 9rem); padding-top: clamp(4rem, 6vw, 6rem); border-top: 1px solid var(--line); }
.details-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(3rem, 8vw, 8rem); margin-top: 3rem; }
.detail-stage { padding: 2rem; background: #eeeef4; border-radius: .5rem; }
.detail-stage img { max-width: 27rem; margin-inline: auto; }
.details-grid article { margin-top: 2rem; }
.details-grid article p { margin-top: 1rem; }
.empty-study { max-width: 18rem; margin: 3rem auto 0; }
.sharing-study .screen-stage { padding: 2rem; }
.sharing-study .screen-link { max-width: 18rem; }
.identity-band { background: #0b0b0b; color: var(--paper); scroll-margin-top: 3.5rem; }
.identity-intro { display: grid; grid-template-columns: 1.3fr 1fr; gap: clamp(3rem, 7vw, 7rem); align-items: center; }
.identity-intro .prose { max-width: 32rem; margin-top: 2rem; }
.identity-band .prose p, .identity-band figcaption, .identity-band .motion-copy > p:last-child { color: #aaa; }
.identity-intro .underlined { margin-top: 2.5rem; font-size: 1.125rem; }
.artifact-study video { display: block; width: 100%; aspect-ratio: 1; object-fit: contain; background: #fff; }
.motion-continuation { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(3rem, 6vw, 6rem); align-items: center; margin-top: 5rem; padding-top: 5rem; border-top: 1px solid #343432; }
.motion-copy h3 { font-size: clamp(2rem, 3vw, 3rem); font-weight: 400; line-height: 1.1; }
.motion-copy > p:last-child { margin-top: 1.5rem; max-width: 27rem; }
.motion-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.motion-pair video { display: block; width: 100%; aspect-ratio: 402 / 874; object-fit: cover; background: #151515; border: 1px solid #343432; border-radius: 1.75rem; }
.today-section .section-intro { grid-template-columns: 1.2fr 1fr; }
.app-store-link { margin-top: 1.75rem; }
.reflection { display: grid; grid-template-columns: 1fr 2fr; gap: 2rem; margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.reflection > p:last-child { max-width: 47rem; font-size: clamp(1.25rem, 2vw, 1.75rem); line-height: 1.45; letter-spacing: -.025em; }
.details-grid article .exploration-note { font-size: .875rem; }
.closing-line { display: flex; justify-content: space-between; align-items: center; gap: 2rem; margin-top: 4rem; padding-top: 4rem; border-top: 1px solid var(--line); }
.closing-line p { max-width: 20ch; font-size: clamp(2.5rem, 5vw, 5rem); font-weight: 300; line-height: 1; letter-spacing: -.05em; }
.closing-line img { width: clamp(6rem, 13vw, 12rem); height: auto; border-radius: 24%; }
.related-case { background: #0b0b0b; color: var(--paper); }
.related-case-inner { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(3rem, 9vw, 10rem); align-items: center; width: calc(100% - var(--gutter) * 2); max-width: 1280px; margin: 0 auto; padding-block: clamp(4rem, 7vw, 7rem); }
.related-case .section-label { color: #aaa; }
.related-case h2 { max-width: 11ch; }
.related-case-copy > p:not(.section-label) { max-width: 28rem; margin-top: 1.75rem; color: #aaa; font-size: 1.0625rem; line-height: 1.65; letter-spacing: -.012em; }
.related-case-copy .text-link { margin-top: 2rem; }
.related-case-visual { display: block; max-width: 30rem; justify-self: end; overflow: hidden; border: 1px solid #343432; border-radius: 1.5rem; background: #fff; }
.related-case-visual:focus-visible { outline: 2px solid #fff; outline-offset: 6px; }
.related-case-visual video { display: block; width: 100%; aspect-ratio: 1; object-fit: cover; }
.image-dialog { width: min(95vw, 1300px); max-height: 94svh; margin: auto; padding: 1.25rem; border: 1px solid var(--line); border-radius: .75rem; background: var(--paper); color: var(--ink); }
.image-dialog::backdrop { background: rgb(0 0 0 / 78%); }
.dialog-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; margin-bottom: 1rem; }
.dialog-toolbar p { font-size: .875rem; line-height: 1.4; }
.dialog-toolbar button { display: flex; align-items: center; gap: .65rem; flex: 0 0 auto; padding: .5rem .75rem; border: 1px solid var(--line); border-radius: .25rem; background: transparent; font-size: .875rem; }
.dialog-toolbar button span { font-size: 1.35rem; line-height: 1; }
.dialog-image-area { display: flex; justify-content: center; overflow: auto; }
.dialog-image-area img { width: auto; max-width: 100%; height: auto; max-height: 72svh; object-fit: contain; }
.original-link { display: inline-flex; align-items: center; gap: .5rem; margin-top: 1rem; font-size: .8125rem; text-decoration: underline; text-underline-offset: .25em; }
body:has(.image-dialog[open]) { overflow: hidden; }

@media (max-width: 1100px) {
  .hero { padding-left: 0; padding-right: 0; gap: 2rem; }
  .hero-stage { min-height: 0; padding: 2rem 1.5rem; }
  .timeline { max-width: 15rem; }
  .hero-statement { margin-top: 2rem; }
  .desktop-break { display: none; }
  .project-meta { flex-direction: column; gap: 1rem; }
  .split-section, .onboarding-section { grid-template-columns: .9fr 1.2fr; gap: 2rem; }
  .comparison-stage { gap: 1.25rem; padding: 1.5rem; }
  .comparison-stage figure { width: 50%; }
  .comparison-stage figcaption { font-size: .8125rem; }
  .premise-grid { grid-template-columns: 1.1fr 1fr; gap: 2rem; }
  .learning-notes { gap: 1.75rem; }
}
@media (max-width: 800px) {
  .hero { grid-template-columns: 1fr 1fr; }
  .hero-statement { font-size: 1.75rem; }
  .intro { font-size: 1rem; }
  .project-meta dd { font-size: .75rem; }
  .split-section, .onboarding-section { grid-template-columns: 1fr; }
  .section-copy { max-width: 40rem; }
  .comparison-stage { padding: 2rem; gap: 2rem; }
  .comparison-stage figure { width: min(45%, 17rem); }
  .change-notes { margin-top: 2rem; }
  .learning-notes { grid-template-columns: 1fr; gap: 2rem; }
  .learning-notes article { display: grid; grid-template-columns: 1fr 1.3fr; gap: 2rem; }
  .learning-notes p { margin: 0; }
  .viewer-comparison { gap: 1.25rem; }
  .viewer-comparison .screen-stage { padding: 1.5rem; }
  .details-grid { gap: 2rem; }
  .identity-intro { gap: 2rem; }
  .motion-continuation { grid-template-columns: 1fr; }
  .motion-pair { max-width: 36rem; }
  .today-section .section-intro { grid-template-columns: 1fr 1fr; }
  .related-case-inner { gap: 3rem; }
}
@media (max-width: 600px) {
  .hero { grid-template-columns: 1fr; gap: 2.5rem; padding-block: 3rem 2.5rem; }
  h1 { font-size: clamp(5rem, 18vw, 7rem); }
  .hero-statement { max-width: 21ch; font-size: 2rem; margin-top: 1.5rem; }
  .intro { max-width: 32rem; font-size: 1.0625rem; margin-top: 1.5rem; }
  .project-meta { flex-direction: row; gap: 1.5rem; margin-top: 1.5rem; }
  .project-meta dd { font-size: .75rem; }
  .hero-stage { padding-block: 2rem; }
  .timeline { max-width: 14rem; }
  .chapter-nav-inner { justify-content: flex-start; gap: 1.5rem; padding-inline: 1.25rem; }
  .chapter-nav a { padding-block: 1rem; }
  .section-label { margin-bottom: 1.25rem; }
  .premise-grid, .section-intro, .today-section .section-intro { grid-template-columns: 1fr; gap: 1.75rem; }
  .premise h2 br { display: none; }
  .principle-line { grid-template-columns: 1fr; gap: 1rem; margin-top: 2.5rem; }
  .reflection { grid-template-columns: 1fr; gap: 0; }
  .comparison-stage { gap: 1rem; padding: 1.5rem .875rem; }
  .comparison-stage figure { width: 50%; }
  .comparison-stage figcaption { margin-top: 1rem; font-size: .75rem; }
  .section-copy .prose { margin-top: 1.5rem; }
  .prose p, .details-grid article p { font-size: 1rem; }
  .learning-notes article { display: block; }
  .learning-notes p { margin-top: .75rem; }
  .wide-figure { margin-top: 2rem; }
  .viewer-comparison { gap: 1rem; margin-top: 2rem; }
  .viewer-comparison .screen-stage { padding: 1rem .625rem; }
  .viewer-comparison figcaption { flex-direction: column; gap: .2rem; }
  .details-grid { grid-template-columns: 1fr; gap: 3rem; }
  .detail-stage { padding: 1.5rem; }
  .empty-study { max-width: 16rem; }
  .sharing-study .screen-link { max-width: 14rem; }
  .identity-intro { grid-template-columns: 1fr; gap: 2.5rem; }
  .identity-intro .underlined { font-size: 1rem; }
  .motion-continuation { margin-top: 3rem; padding-top: 3rem; gap: 2rem; }
  .motion-pair { gap: 1rem; }
  .motion-pair video { border-radius: 1rem; }
  .closing-line { margin-top: 3rem; padding-top: 3rem; align-items: flex-end; }
  .closing-line p { font-size: clamp(2rem, 8vw, 2.75rem); }
  .closing-line img { width: 4.5rem; }
  .related-case-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .related-case-visual { width: 100%; max-width: 24rem; justify-self: start; }
  figcaption { font-size: .625rem; }
  .hero-figure figcaption { flex-direction: column; gap: .25rem; }
  .dialog-toolbar { align-items: flex-start; }
  .dialog-toolbar p { font-size: .75rem; }
  .dialog-toolbar button { font-size: .75rem; }
  .image-dialog { padding: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  .arrow, .chapter-nav a { transition: none; }
}