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

:root {
  --site-gutter: clamp(2rem, 3vw, 4rem);
  --site-width: 82rem;
  --section-space: 3rem;
}

body {
  min-inline-size: 0;
  margin: 0;
  background: var(--platform-bg);
  color: var(--platform-text);
}

main {
  min-block-size: 55vh;
}

h1, h2, h3, p, figure, dl, dd {
  margin: 0;
}

h1, h2, h3, p {
  overflow-wrap: anywhere;
}

p {
  max-inline-size: 44rem;
}

img {
  display: block;
  max-inline-size: 100%;
  block-size: auto;
}

a {
  color: inherit;
  text-underline-offset: .24em;
}

a:hover {
  color: var(--platform-hover);
}

button {
  font: inherit;
}

:where(a, button, input, select, textarea, summary):focus-visible {
  outline: 1px solid var(--platform-accent);
  outline-offset: 3px;
}

.wrap {
  inline-size: min(calc(100% - 2 * var(--site-gutter)), var(--site-width));
  margin-inline: auto;
}

.eyebrow, .entry-index, .step-number, .chapter, .caption,
.facts dt, .record-list dt, .breadcrumb, .tag, .mast small {
  color: var(--platform-muted);
  font-size: var(--platform-small);
  line-height: 1.5;
}

.entry-index, .step-number, .chapter, .facts dt, .tag {
  letter-spacing: .09em;
}

:lang(zh) :is(.eyebrow, .entry-index, .step-number, .chapter, .facts dt, .tag) {
  letter-spacing: normal;
}

.skip-link {
  position: fixed;
  z-index: 2;
  inset: 1rem auto auto 1rem;
  padding: .75rem 1rem;
  background: var(--platform-bg);
  color: var(--platform-accent);
  transform: translateY(calc(-100% - 2rem));
}

.skip-link:focus {
  transform: none;
}

.site-header {
  border-block-end: 1px solid var(--platform-line);
}

.header-row {
  display: grid;
  grid-template-columns: minmax(7rem, auto) minmax(0, 1fr) auto;
  align-items: center;
  gap: 1.5rem;
  min-block-size: 5rem;
}

.brand, .site-nav a, .language-switch, .menu-toggle, .mast a,
.link-arrow, .breadcrumb a {
  display: inline-flex;
  align-items: center;
  min-inline-size: 44px;
  min-block-size: 44px;
}

.brand {
  justify-self: start;
  text-decoration: none;
}

.brand img {
  inline-size: 9rem;
}

.site-nav {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  flex-wrap: wrap;
  gap: 0 clamp(.5rem, 1.2vw, 1.25rem);
}

.site-nav a, .language-switch, .menu-toggle, .mast a {
  font-size: var(--platform-intro);
  text-decoration: none;
}

.site-nav a[aria-current] {
  color: var(--platform-accent);
  text-decoration: underline;
}

.site-nav .nav-apply {
  justify-content: center;
  padding-inline: .75rem;
  border: 1px solid var(--platform-control);
  border-radius: .5rem;
}

.site-nav .nav-apply:hover {
  border-color: var(--platform-hover);
}

.language-switch, .menu-toggle {
  justify-content: center;
  min-inline-size: 44px;
  padding-inline: .5rem;
}

.language-switch {
  justify-self: end;
}

.menu-toggle {
  display: none;
  border: 1px solid var(--platform-control);
  border-radius: .5rem;
  background: transparent;
  color: var(--platform-text);
  cursor: pointer;
}

.menu-toggle:hover {
  color: var(--platform-hover);
  border-color: var(--platform-hover);
}

.cover-stage {
  position: relative;
  isolation: isolate;
  display: grid;
  align-items: end;
  min-block-size: clamp(33rem, 48vw, 45rem);
  background: var(--platform-bg);
  overflow: hidden;
}

.cover-photo,
.cover-stage::after {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
}

.cover-photo {
  z-index: -2;
}

.cover-photo img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
  object-position: 50% 50%;
}

.cover-stage::after {
  z-index: -1;
  content: "";
  background:
    linear-gradient(90deg, rgb(10 12 11 / .86) 0%, rgb(10 12 11 / .66) 30%, transparent 72%),
    linear-gradient(0deg, rgb(10 12 11 / .67) 0%, transparent 50%);
}

.cover-copy {
  display: grid;
  justify-items: start;
  gap: .75rem;
  padding-block: 4rem;
}

.cover-kicker {
  color: var(--platform-text);
}

.cover-mark {
  inline-size: min(100%, 28rem);
  margin-block: .25rem .5rem;
}

.cover-copy h1 {
  max-inline-size: 32ch;
}

.cover-copy p {
  max-inline-size: 32rem;
  text-wrap: pretty;
}

.cover-organizer {
  max-inline-size: 32rem;
  font-size: var(--platform-intro);
  line-height: 1.5;
}

.cover-copy .button.primary {
  margin-block-start: .75rem;
  background-color: var(--platform-bg);
}

.caption {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: .25rem 1rem;
  padding-block-start: .75rem;
}

.cover-credit {
  padding-block-end: 1rem;
}

.facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-block: 1px solid var(--platform-line);
}

.facts > div {
  display: grid;
  align-content: start;
  gap: .25rem;
  padding: 1rem 1.5rem;
}

.facts > div:first-child {
  padding-inline-start: 0;
}

.facts > div + div {
  border-inline-start: 1px solid var(--platform-line);
}

.facts dd {
  font-size: var(--platform-h3);
  font-variant-numeric: tabular-nums;
  line-height: 1.4;
}

.fact-strip {
  margin-block-end: var(--section-space);
}

.archive-band {
  background-color: var(--platform-bg);
  color: var(--platform-text);
}

.edition-spread {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 0 clamp(1.5rem, 4vw, 3rem);
  border-block: 1px solid var(--platform-line);
}

.edition-record {
  display: grid;
  grid-template-columns: minmax(8.5rem, auto) minmax(0, 1fr);
  gap: 1.5rem clamp(1.5rem, 4vw, 3rem);
  padding-block: 1.5rem;
}

.edition-index, .edition-copy, .edition-next {
  display: grid;
  align-content: start;
  justify-items: start;
  gap: .5rem;
  min-inline-size: 0;
}

.edition-year {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  line-height: .95;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.04em;
}

.edition-next {
  padding: 1.5rem 0 1.5rem clamp(1.5rem, 4vw, 3rem);
  border-inline-start: 1px solid var(--platform-line);
}

.edition-copy p, .edition-next p, .legacy-intro p {
  color: var(--platform-muted);
}

.legacy-spread {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 6fr);
  gap: 1.5rem clamp(2rem, 6vw, 5rem);
}

.legacy-intro .section-head {
  margin-block-end: .75rem;
}

.legacy-spread .sequence {
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-block-end: 1px solid var(--platform-line);
}

.legacy-spread .sequence > li {
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: .25rem .75rem;
  padding: .875rem 0;
}

.legacy-spread .sequence p {
  grid-column: 2;
}

.legacy-spread .step-number {
  margin-block-start: .25rem;
  color: var(--platform-accent);
}

.course-panel {
  padding-block-start: 2rem;
  border-block-start: 1px solid var(--platform-line);
}

.course-panel img {
  inline-size: 100%;
  max-block-size: 32rem;
  object-fit: cover;
  object-position: 50% 52%;
}

.art-panel {
  justify-items: start;
  padding: var(--platform-panel-inset);
  background-color: var(--platform-bg);
  color: var(--platform-text);
  border-block-start: 1px solid var(--platform-control);
}

.section {
  padding-block: var(--section-space);
}

.section + .section {
  border-block-start: 1px solid var(--platform-line);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem 1.5rem;
  margin-block-end: 1.5rem;
}

.section-head .eyebrow, .page-heading .eyebrow {
  margin-block-end: .5rem;
}

.section-head > .eyebrow {
  flex-basis: 100%;
  margin-block-end: 0;
}

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: 1.5rem clamp(2rem, 5vw, 4rem);
}

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

@media (min-width: 37.5625rem) {
  .collection:has(> .entry:nth-child(2):last-child) {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.entry {
  display: grid;
  align-content: start;
  justify-items: start;
  gap: .75rem;
  min-inline-size: 0;
  padding: 1rem 0 0;
  border-block-start: 1px solid var(--platform-line);
}

.entry p, .sequence p, .timeline p {
  color: var(--platform-muted);
}

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

p + .sequence {
  margin-block-start: 1.5rem;
}

.sequence > li {
  display: grid;
  align-content: start;
  justify-items: start;
  gap: .75rem;
  min-inline-size: 0;
  padding: 1rem 1rem 0 0;
  border-block-start: 1px solid var(--platform-line);
}

.step-number {
  font-variant-numeric: tabular-nums;
}

.page-head {
  padding-block: 1rem 2.5rem;
  border-block-end: 1px solid var(--platform-line);
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  column-gap: .5rem;
  min-block-size: 44px;
  margin-block-end: 1.5rem;
}

.breadcrumb a {
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 1rem 2rem;
}

.page-content > .split {
  margin-block-end: 1.5rem;
}

.page-heading h1 {
  max-inline-size: 32ch;
}

.page-heading p:not(.eyebrow) {
  margin-block-start: .75rem;
  color: var(--platform-muted);
}

.chapter {
  justify-self: end;
  padding-inline-start: 1rem;
  border-inline-start: 1px solid var(--platform-line);
  text-align: end;
}

.body-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  align-items: start;
  gap: 2rem clamp(2rem, 5vw, 4rem);
  padding-block: var(--section-space);
}

.main-column, .side-column {
  display: grid;
  align-content: start;
  gap: 1.5rem;
  min-inline-size: 0;
}

.main-column > section, .side-column > section, .note, .media-frame {
  display: grid;
  align-content: start;
  gap: .75rem;
  min-inline-size: 0;
}

.main-column > section + section {
  padding-block-start: 1.5rem;
  border-block-start: 1px solid var(--platform-line);
}

.side-column > section + section {
  padding-block-start: 1rem;
  border-block-start: 1px solid var(--platform-line);
}

.record-list {
  display: grid;
  margin: 0;
  border-block-start: 1px solid var(--platform-line);
}

.record-list dl {
  display: contents;
}

.record-list > div, .record-list dl > div {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
  align-items: baseline;
  gap: .25rem .75rem;
  padding-block: .75rem;
  border-block-end: 1px solid var(--platform-line);
}

.record-list dt, .record-list dd {
  overflow-wrap: anywhere;
}

.note {
  padding: var(--platform-panel-inset);
  border: 1px solid var(--platform-line);
  border-radius: .5rem;
  background: var(--platform-surface);
}

.media-frame img {
  inline-size: 100%;
}

.media-frame figcaption {
  color: var(--platform-muted);
  font-size: var(--platform-small);
  line-height: 1.5;
}

.actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem 1rem;
  margin-block-start: .25rem;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: .5rem;
  min-inline-size: 44px;
  min-block-size: 44px;
  max-inline-size: 100%;
  padding: .5rem 1rem;
  border: 1px solid var(--platform-control);
  border-radius: .5rem;
  background: transparent;
  color: var(--platform-text);
  font-size: var(--platform-intro);
  font-weight: 500;
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  overflow-wrap: anywhere;
}

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

.button:hover {
  border-color: var(--platform-hover);
  color: var(--platform-hover);
}

.link-arrow {
  gap: .5rem;
  max-inline-size: 100%;
  color: var(--platform-accent);
  font-size: var(--platform-intro);
  overflow-wrap: anywhere;
}

.tag {
  display: inline-block;
  justify-self: start;
  max-inline-size: 100%;
  padding: .25rem .5rem;
  border: 1px solid var(--platform-line);
  border-radius: .5rem;
}

.timeline {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-block-start: 1px solid var(--platform-line);
}

.timeline > * {
  display: grid;
  gap: .5rem;
  padding-block: 1rem;
  border-block-end: 1px solid var(--platform-line);
}

.mast {
  border-block-start: 1px solid var(--platform-line);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, auto) auto;
  align-items: center;
  gap: 1rem 2rem;
  padding-block: 1.5rem;
}

.footer-grid > * {
  min-inline-size: 0;
}

.footer-grid > :last-child {
  display: grid;
  justify-items: start;
}

.mast nav {
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 0 1rem;
}

.mast a:hover {
  text-decoration: underline;
}

.mast img {
  inline-size: 8rem;
}

.mast .footer-ecosystem {
  margin-block-start: .5rem;
  color: var(--platform-muted);
}

@media (max-width: 56.25rem) {
  .footer-grid {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .header-row {
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 0 .5rem;
    min-block-size: 4rem;
  }

  .header-row .brand img {
    inline-size: 7.5rem;
  }

  .header-row > .language-switch {
    grid-column: 3;
    grid-row: 1;
  }

  .js .menu-toggle {
    display: inline-flex;
    grid-column: 2;
    grid-row: 1;
  }

  .site-nav {
    grid-column: 1 / -1;
    justify-content: flex-start;
    gap: .25rem 1rem;
    padding-block: .5rem .75rem;
    border-block-start: 1px solid var(--platform-line);
  }

  .js .site-header:not([data-open="true"]) .site-nav {
    display: none;
  }

  .collection {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .body-grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  }
}

@media (max-width: 45rem) {
  .split, .body-grid, .edition-spread, .legacy-spread {
    grid-template-columns: minmax(0, 1fr);
  }

  .edition-next {
    padding-inline: 0;
    border-inline-start: 0;
    border-block-start: 1px solid var(--platform-line);
  }

  .cover-copy {
    gap: .75rem;
    padding-block: 2rem;
  }

  .cover-stage::after {
    background: linear-gradient(0deg, rgb(10 12 11 / .93) 0%, rgb(10 12 11 / .64) 43%, transparent 76%);
  }

  .cover-mark {
    inline-size: min(100%, 20rem);
  }

  .facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .facts > div {
    padding-inline: 1rem;
  }

  .facts > div:nth-child(odd) {
    padding-inline-start: 0;
    border-inline-start: 0;
  }

  .facts > div:nth-child(n + 3) {
    border-block-start: 1px solid var(--platform-line);
  }
}

@media (max-width: 37.5rem) {
  :root {
    --site-gutter: 1.25rem;
    --section-space: 2rem;
  }

  .site-nav {
    display: grid;
    align-items: start;
    gap: .25rem;
  }

  .site-nav a {
    justify-content: flex-start;
    padding-inline: .5rem;
  }

  .site-nav .nav-apply {
    justify-self: start;
  }

  .cover-mark {
    inline-size: min(100%, 17rem);
  }

  .edition-record {
    grid-template-columns: minmax(0, 1fr);
    gap: 1rem;
  }

  .collection, .sequence, .page-heading, .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .chapter {
    justify-self: start;
    padding-inline-start: 0;
    border-inline-start: 0;
    text-align: start;
  }

  .page-head {
    padding-block-end: 1.5rem;
  }

  .breadcrumb {
    margin-block-end: 1rem;
  }

  .mast nav {
    justify-content: flex-start;
  }
}