.article-page-shell {
  --article-page-background: var(--color-background);
  --article-page-background-image: none;
  --article-page-background-size: auto;
  --article-page-background-position: center top;
  --article-page-background-repeat: no-repeat;
  --article-page-background-attachment: scroll;
  --article-surface: var(--color-surface);
  --article-surface-soft: var(--color-surface-soft);
  --article-text: var(--color-text);
  --article-text-muted: var(--color-text-muted);
  --article-heading: var(--color-text);
  --article-link: var(--color-accent-warm);
  --article-link-hover: color-mix(in srgb, var(--color-accent-warm) 76%, var(--color-text));
  --article-selection-background: color-mix(in srgb, var(--color-accent-warm) 24%, transparent);
  --article-selection-text: var(--article-text);
  --article-title-font: var(--font-family-reading);
  --article-heading-font: var(--font-family-reading);
  --article-prose-font: var(--font-family-reading);
  --article-nav-font: var(--font-family-body);
  --article-blockquote-border: color-mix(in srgb, var(--color-accent-warm) 55%, transparent);
  --article-blockquote-surface: color-mix(in srgb, var(--color-surface) 62%, transparent);
  --article-code-surface: var(--color-surface-soft);
  --article-divider: color-mix(in srgb, var(--color-text-muted) 24%, transparent);
  --article-nav-accent: var(--color-accent-warm);
  --article-nav-background: color-mix(in srgb, var(--color-accent-warm) 4%, var(--color-surface));
  --article-nav-border: color-mix(in srgb, var(--color-accent-warm) 14%, var(--color-text-muted) 14%);
  --article-nav-text: color-mix(in srgb, var(--color-text-muted) 88%, var(--color-accent-warm) 12%);
  --article-nav-muted: color-mix(in srgb, var(--color-text-muted) 76%, var(--color-accent-warm) 8%);
  --article-nav-hover-surface: color-mix(in srgb, var(--color-accent-warm) 8%, transparent);
  --article-nav-hover-text: var(--article-text);
  --article-nav-active-surface: color-mix(in srgb, var(--color-accent-warm) 13%, transparent);
  --article-nav-active-text: color-mix(in srgb, var(--color-accent-warm) 76%, var(--color-text));
  --article-nav-focus: color-mix(in srgb, var(--color-accent-warm) 72%, var(--color-text));
  --article-top-nav-background: #fffefa;
  --article-top-nav-border: #dad7d1;
  --article-top-nav-text: var(--color-text);
  --article-top-nav-hover: var(--color-accent-warm);
  --article-top-nav-underline: var(--article-top-nav-hover);
  --article-music-surface: color-mix(in srgb, var(--color-surface) 90%, transparent);
  --article-music-border: color-mix(in srgb, var(--color-text-muted) 24%, transparent);
  --article-music-text: var(--article-text-muted);
  --article-music-hover: color-mix(in srgb, var(--color-accent-warm) 10%, var(--color-surface));
  --article-music-active: color-mix(in srgb, var(--color-accent-warm) 18%, var(--color-surface));
  --article-music-active-text: color-mix(in srgb, var(--color-accent-warm) 74%, var(--article-text));
  --article-music-focus: color-mix(in srgb, var(--color-accent-warm) 72%, var(--article-text));

  background-color: var(--article-page-background);
  background-image: var(--article-page-background-image);
  background-size: var(--article-page-background-size);
  background-position: var(--article-page-background-position);
  background-repeat: var(--article-page-background-repeat);
  background-attachment: var(--article-page-background-attachment);
  color: var(--article-text);
}

.article-page-shell ::selection {
  background: var(--article-selection-background);
  color: var(--article-selection-text);
}

.article-page {
  --article-environment-width: 92rem;
  --article-index-track: clamp(9.5rem, 12vw, 10.5rem);
  --article-index-reading-gap: calc(
    clamp(3rem, 4.5vw, 4rem) +
      (clamp(10.5rem, 15vw, 13rem) - var(--article-index-track))
  );
  --article-index-outward-shift: clamp(
    0rem,
    calc((100vw - var(--article-environment-width)) * 0.35),
    18rem
  );
  --article-prose-width: 46rem;
  --article-wide-media-width: 54rem;
  --article-index-accent: var(--article-nav-accent);
  --article-index-surface: var(--article-nav-background);
  --article-index-border: var(--article-nav-border);
  --article-index-text: var(--article-nav-text);
  --article-index-muted-text: var(--article-nav-muted);
  --article-index-hover-surface: var(--article-nav-hover-surface);
  --article-index-active-surface: var(--article-nav-active-surface);
  --article-index-active-text: var(--article-nav-active-text);

  display: grid;
  grid-template-columns: var(--article-index-track) minmax(0, 1fr);
  column-gap: var(--article-index-reading-gap);
  inline-size: min(100%, var(--article-environment-width));
  margin-inline: auto;
  padding-block: clamp(var(--space-8), 6vw, 5rem) clamp(5rem, 10vw, 9rem);
}

.article-page[data-article-has-navigation="true"] {
  --article-environment-width: 104rem;
}

.article-page[data-article-has-navigation="false"] {
  grid-template-columns: minmax(0, 1fr);
}

.article-page[data-article-has-navigation="false"] .article-page__reading {
  grid-column: 1;
}

.article-page__navigation {
  grid-column: 1;
  min-inline-size: 0;
  transform: translateX(calc(-1 * var(--article-index-outward-shift)));
}

.article-page__reading {
  grid-column: 2;
  inline-size: 100%;
  position: relative;
}

.article-page__reading,
.article-page__content,
.article-page [data-content-mount="content"] {
  min-inline-size: 0;
}

.article-page__header:empty,
.article-page__navigation[hidden] {
  display: none;
}

.article-page__music {
  position: fixed;
  z-index: 20;
  inset-inline-end: max(
    clamp(1rem, 2.5vw, 2rem),
    env(safe-area-inset-right)
  );
  inset-block-end: max(
    clamp(1rem, 2.5vw, 2rem),
    env(safe-area-inset-bottom)
  );
}

.article-page__music[hidden] {
  display: none;
}

.article-music-control {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  inline-size: 3.1rem;
  min-inline-size: 3.1rem;
  max-inline-size: 3.1rem;
  block-size: 3.1rem;
  min-block-size: 3.1rem;
  max-block-size: 3.1rem;
  padding: 0;
  border: 1px solid var(--article-music-border);
  border-radius: 50%;
  background: var(--article-music-surface);
  color: var(--article-music-text);
  font: inherit;
  line-height: 1;
  cursor: pointer;
  transition:
    background-color 150ms ease,
    border-color 150ms ease,
    color 150ms ease,
    opacity 150ms ease;
}

.article-music-control:hover {
  background: var(--article-music-hover);
  color: var(--article-heading);
}

.article-music-control[aria-pressed="true"] {
  background: var(--article-music-active);
  color: var(--article-music-active-text);
}

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

.article-music-control:disabled {
  cursor: wait;
  opacity: 0.62;
}

.article-music-control__icon {
  position: relative;
  display: block;
  inline-size: 1.15rem;
  block-size: 1.15rem;
}

.article-music-control__icon::before,
.article-music-control__icon::after {
  content: "";
  position: absolute;
}

.article-music-control[aria-pressed="false"]
  .article-music-control__icon::before {
  inset-block-start: 50%;
  inset-inline-start: 50%;
  inline-size: 0;
  block-size: 0;
  border-block-start: 0.54rem solid transparent;
  border-block-end: 0.54rem solid transparent;
  border-inline-start: 0.86rem solid currentColor;
  transform: translate(-39%, -50%);
}

.article-music-control[aria-pressed="false"]
  .article-music-control__icon::after {
  content: none;
}

.article-music-control[aria-pressed="true"]
  .article-music-control__icon::before,
.article-music-control[aria-pressed="true"]
  .article-music-control__icon::after {
  inset-block-start: 50%;
  inline-size: 0.27rem;
  block-size: 1rem;
  border-radius: 0.08rem;
  background: currentColor;
  transform: translateY(-50%);
}

.article-music-control[aria-pressed="true"]
  .article-music-control__icon::before {
  inset-inline-start: 0.17rem;
}

.article-music-control[aria-pressed="true"]
  .article-music-control__icon::after {
  inset-inline-end: 0.17rem;
}

.article-index {
  position: sticky;
  top: 50svh;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  max-block-size: calc(100svh - clamp(3rem, 8vh, 5rem));
  padding-block: clamp(0.9rem, 1.5vw, 1.2rem);
  padding-inline: clamp(0.55rem, 1vw, 0.75rem);
  border: 1px solid var(--article-index-border);
  border-radius: 0.85rem;
  background: var(--article-index-surface);
  color: var(--article-index-text);
  font-family: var(--article-nav-font);
  transform: translateY(-50%);
}

.article-index__toggle {
  display: none;
}

.article-index__viewport {
  min-block-size: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--article-index-accent) 24%, transparent)
    transparent;
}

.article-index__list,
.article-index__children {
  margin: 0;
  padding: 0;
  list-style: none;
}

.article-index__item {
  margin: 0;
}

.article-index__item + .article-index__item {
  margin-block-start: var(--space-2);
}

.article-index__children {
  margin-block: var(--space-2) var(--space-4);
  padding-inline-start: var(--space-4);
}

.article-index__children .article-index__item + .article-index__item {
  margin-block-start: 0.15rem;
}

.article-index__link {
  display: block;
  padding: 0.38rem 0.48rem;
  border-radius: 0.35rem;
  color: var(--article-index-text);
  font-size: 0.92rem;
  line-height: 1.45;
  text-decoration: none;
  transition:
    background-color 150ms ease,
    color 150ms ease;
}

.article-index__item--h3 > .article-index__link {
  color: var(--article-index-muted-text);
  font-size: 0.84rem;
}

.article-index__link:hover {
  background: var(--article-index-hover-surface);
  color: var(--article-nav-hover-text);
}

.article-index__link[aria-current="location"] {
  background: var(--article-index-active-surface);
  color: var(--article-index-active-text);
  font-weight: var(--font-weight-medium);
}

.article-index__item--h2[data-descendant-active]
  > .article-index__link:not([aria-current="location"]) {
  color: var(--article-nav-text);
}

.article-index__link:focus-visible,
.article-index__toggle:focus-visible {
  outline: 2px solid var(--article-nav-focus);
  outline-offset: 2px;
}

.article-page-shell .navigation {
  background: var(--article-top-nav-background);
  border-block-color: var(--article-top-nav-border);
}

.article-page-shell .navigation .navigation__link {
  background: transparent;
  color: var(--article-top-nav-text);
  box-shadow: none;
  transition:
    color 160ms ease,
    opacity 160ms ease;
}

.article-page-shell .navigation .navigation__link::after {
  content: "";
  position: absolute;
  inset-inline: 0.9rem;
  inset-block-end: 0.34rem;
  block-size: 1px;
  background: var(--article-top-nav-underline);
  opacity: 0;
  transform: scaleX(0.35);
  transform-origin: center;
  transition:
    opacity 160ms ease,
    transform 160ms ease;
}

.article-page-shell .navigation .navigation__link:hover,
.article-page-shell .navigation .navigation__link[aria-current="page"],
.article-page-shell .navigation .navigation__link[aria-current="page"]:hover {
  background: transparent;
  color: var(--article-top-nav-hover);
  box-shadow: none;
}

.article-page-shell .navigation .navigation__link:hover::after,
.article-page-shell .navigation .navigation__link[aria-current="page"]::after {
  opacity: 0.62;
  transform: scaleX(1);
}

.article-page__status {
  inline-size: min(100%, var(--article-prose-width));
  margin: 0;
  color: var(--article-text-muted);
}

.article-page__header {
  inline-size: min(100%, 62rem);
  margin-inline: 0;
  margin-block-end: clamp(4rem, 7vw, 6.5rem);
}

.article-page__header :where([data-content-field="title"]) {
  max-inline-size: 48rem;
  margin: 0;
  color: var(--article-heading);
  font-family: var(--article-title-font);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: var(--font-weight-medium);
  line-height: 1.24;
  letter-spacing: 0.02em;
  text-wrap: balance;
}

.article-page__header :where([data-content-region="cover"]) {
  inline-size: min(100%, 54rem);
  margin: clamp(var(--space-8), 5vw, 4rem) 0 0;
}

.article-page__header :where([data-content-region="cover"] img) {
  display: block;
  inline-size: 100%;
  block-size: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.article-page__content :where([data-content-kind="article"]) {
  min-inline-size: 0;
}

.article-page__content :where([data-content-region="body"]) {
  inline-size: min(100%, var(--article-prose-width));
  margin-inline: 0;
  color: var(--article-text);
  font-family: var(--article-prose-font);
  font-size: clamp(1.05rem, 0.98rem + 0.24vw, 1.16rem);
  line-height: 1.9;
  overflow-wrap: anywhere;
}

.article-page__content :where([data-content-region="body"] p) {
  margin: 0 0 1.45em;
}

.article-page__content :where([data-content-region="body"] h1),
.article-page__content :where([data-content-region="body"] h2),
.article-page__content :where([data-content-region="body"] h3),
.article-page__content :where([data-content-region="body"] h4),
.article-page__content :where([data-content-region="body"] h5),
.article-page__content :where([data-content-region="body"] h6) {
  color: var(--article-heading);
  font-family: var(--article-heading-font);
  font-weight: var(--font-weight-medium);
  line-height: 1.36;
  text-wrap: balance;
  scroll-margin-block-start: clamp(2rem, 8vh, 5rem);
}

.article-page__content :where([data-content-region="body"] :is(h2, h3):focus-visible) {
  outline: 2px solid var(--article-nav-focus);
  outline-offset: 0.35rem;
}

.article-page__content :where([data-content-region="body"] h1),
.article-page__content :where([data-content-region="body"] h2) {
  margin: 4.5rem 0 1.5rem;
  font-size: clamp(1.75rem, 1.5rem + 0.7vw, 2.15rem);
}

.article-page__content :where([data-content-region="body"] h3) {
  margin: 3.25rem 0 1.2rem;
  font-size: clamp(1.35rem, 1.2rem + 0.4vw, 1.6rem);
}

.article-page__content :where([data-content-region="body"] h4),
.article-page__content :where([data-content-region="body"] h5),
.article-page__content :where([data-content-region="body"] h6) {
  margin: 2.5rem 0 var(--space-4);
  font-size: 1.15em;
}

.article-page__content :where([data-content-region="body"] blockquote) {
  margin: 2.5rem 0;
  padding: var(--space-4) var(--space-6);
  border-inline-start: 0.2rem solid var(--article-blockquote-border);
  background: var(--article-blockquote-surface);
  color: var(--article-text-muted);
}

.article-page__content :where([data-content-region="body"] blockquote p:last-child) {
  margin-block-end: 0;
}

.article-page__content :where([data-content-region="body"] ul),
.article-page__content :where([data-content-region="body"] ol) {
  margin: 1.5rem 0 2rem;
  padding-inline-start: 1.6em;
}

.article-page__content :where([data-content-region="body"] li + li) {
  margin-block-start: var(--space-2);
}

.article-page__content :where([data-content-region="body"] a) {
  color: var(--article-link);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.article-page__content :where([data-content-region="body"] a:hover) {
  color: var(--article-link-hover);
}

.article-page__content :where([data-content-region="body"] code) {
  font-family: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.9em;
}

.article-page__content :where([data-content-region="body"] :not(pre) > code) {
  padding: 0.12em 0.34em;
  background: var(--article-code-surface);
}

.article-page__content :where([data-content-region="body"] pre) {
  max-inline-size: 100%;
  margin: 2.25rem 0;
  padding: var(--space-6);
  overflow-x: auto;
  background: var(--article-code-surface);
  line-height: 1.65;
  tab-size: 2;
}

.article-page__content :where([data-content-region="body"] hr) {
  margin: 4rem auto;
  border: 0;
  border-block-start: 1px solid var(--article-divider);
}

.article-page__content :where([data-content-region="body"] img) {
  display: block;
  inline-size: min(
    var(--article-wide-media-width),
    calc(100vw - var(--layout-page-gutter) - var(--layout-page-gutter))
  );
  max-inline-size: none;
  block-size: auto;
  margin: 3rem 0 3.25rem;
  transform: none;
}

@media (max-width: 72rem) {
  .article-page {
    grid-template-columns: minmax(0, 1fr);
    column-gap: 0;
    padding-block: clamp(var(--space-6), 6vw, var(--space-12)) clamp(4rem, 10vw, 6rem);
  }

  .article-page__navigation {
    grid-column: 1;
    inline-size: min(100%, var(--article-prose-width));
    margin-block-end: var(--space-8);
    transform: none;
  }

  .article-page__reading {
    grid-column: 1;
  }

  .article-index {
    position: relative;
    top: auto;
    max-block-size: none;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    transform: none;
  }

  .article-index__toggle {
    display: inline-flex;
    align-items: center;
    min-block-size: 2.6rem;
    align-self: flex-start;
    padding: 0.45rem 0.8rem;
    border: 1px solid var(--article-index-border);
    border-radius: 0.4rem;
    background: var(--article-index-surface);
    color: var(--article-nav-text);
    font: inherit;
    cursor: pointer;
  }

  .article-index__toggle::after {
    content: "⌄";
    margin-inline-start: var(--space-2);
    color: var(--article-nav-muted);
  }

  .article-index[data-expanded="true"] .article-index__toggle::after {
    content: "⌃";
  }

  .article-index__viewport {
    display: none;
    max-block-size: min(50svh, 24rem);
    margin-block-start: var(--space-3);
    padding: var(--space-3);
    border: 1px solid var(--article-index-border);
    border-radius: 0.5rem;
    background: var(--article-index-surface);
  }

  .article-index[data-expanded="true"] .article-index__viewport {
    display: block;
  }
}

@media (max-width: 48rem) {
  .article-page__music {
    inset-inline-end: max(0.75rem, env(safe-area-inset-right));
    inset-block-end: max(0.75rem, env(safe-area-inset-bottom));
  }

  .article-music-control {
    inline-size: 2.75rem;
    min-inline-size: 2.75rem;
    max-inline-size: 2.75rem;
    block-size: 2.75rem;
    min-block-size: 2.75rem;
    max-block-size: 2.75rem;
  }

  .article-music-control__icon {
    inline-size: 1rem;
    block-size: 1rem;
  }

  .article-music-control[aria-pressed="false"]
    .article-music-control__icon::before {
    border-block-start-width: 0.48rem;
    border-block-end-width: 0.48rem;
    border-inline-start-width: 0.77rem;
  }

  .article-music-control[aria-pressed="true"]
    .article-music-control__icon::before,
  .article-music-control[aria-pressed="true"]
    .article-music-control__icon::after {
    inline-size: 0.24rem;
    block-size: 0.88rem;
  }

  .article-page__header {
    margin-block-end: 3.5rem;
  }

  .article-page__header :where([data-content-field="title"]) {
    font-size: clamp(2rem, 9vw, 2.8rem);
  }

  .article-page__header :where([data-content-region="cover"]) {
    margin-block-start: var(--space-8);
  }

  .article-page__content :where([data-content-region="body"]) {
    font-size: 1.04rem;
    line-height: 1.82;
  }

  .article-page__content :where([data-content-region="body"] h1),
  .article-page__content :where([data-content-region="body"] h2) {
    margin-block-start: 3.5rem;
  }

  .article-page__content :where([data-content-region="body"] img) {
    inline-size: 100%;
    max-inline-size: 100%;
    margin: 2.25rem 0 2.5rem;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .article-index__link,
  .article-music-control,
  .article-page-shell .navigation .navigation__link,
  .article-page-shell .navigation .navigation__link::after {
    transition: none;
  }
}