/* Opt-in article navigation; other pages retain their existing layout. */
.reading-layout .reading-guide-note {
  clear: both;
  margin: 0 0 1.4em;
  padding-left: 0.85em;
  border-left: 2px solid var(--global-border-color);
  font-size: 0.8em;
  line-height: 1.6;
}

.reading-layout .reading-guide {
  clear: both;
  margin-bottom: 1.5em;
  padding: 0.7em 0.9em;
  border: 1px solid var(--global-border-color);
  border-radius: 4px;
  background: var(--global-bg-color);
  font-size: 0.8em;
}

.reading-guide summary {
  cursor: pointer;
  font-weight: 700;
}

.reading-guide ul {
  margin: 0.65em 0 0;
  padding: 0;
  list-style: none;
}

.reading-guide li {
  margin: 0;
}

.reading-guide a {
  display: block;
  padding: 0.5em 0.75em;
  border-left: 2px solid transparent;
  color: inherit;
  line-height: 1.35;
  text-decoration: none;
}

.reading-guide a:hover,
.reading-guide a:focus-visible {
  text-decoration: underline;
}

.reading-guide a[aria-current="location"] {
  border-left-color: currentColor;
  font-weight: 700;
}

.reading-layout #article-start,
.reading-layout .page__content h2,
.reading-layout .page__content h3 {
  scroll-margin-top: 90px;
}

@media (max-width: 1023px) {
  .reading-layout .page {
    width: 100%;
    padding: 0;
    float: none;
  }
}

@media (min-width: 1024px) {
  .reading-layout .reading-guide {
    position: fixed;
    top: 100px;
    left: max(1em, calc((100vw - 1280px) / 2 + 1em));
    width: min(210px, 17vw);
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    margin: 0;
    padding: 0 0.5em 0 0;
    border: 0;
    border-radius: 0;
    font-size: 0.7rem;
  }

  .reading-guide summary {
    list-style: none;
    cursor: default;
    padding: 0 0.75em 0.65em;
  }

  .reading-guide summary::-webkit-details-marker {
    display: none;
  }

  .reading-guide ul {
    margin-top: 0;
  }
}