.topnav a,
.topnav a[aria-current='page'] {
  background: transparent;
  border: 0;
  border-radius: 0;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .12em;
  padding: 0;
  text-decoration: none;
  text-transform: uppercase;
}

.topnav a:hover,
.brand:hover,
.breadcrumbs a:hover,
.chapter-turn-link:hover strong,
.chapter-float-link:hover .chapter-float-label {
  text-decoration: underline;
  text-underline-offset: .18em;
}

.breadcrumbs {
  color: var(--muted);
  font-size: .92rem;
  margin: 0 0 22px;
}

.breadcrumbs ol {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumbs li {
  align-items: center;
  display: inline-flex;
  gap: 8px;
}

.breadcrumbs li + li::before {
  color: var(--line);
  content: '›';
}

.breadcrumbs a {
  text-decoration: none;
}

.reader {
  padding-top: 34px;
}

.reader > .chapter-nav,
.reader-flow {
  display: none;
}

.book-link,
.chapter-tile {
  border-radius: 20px;
}

.chapter-turn {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr 1fr;
  margin-top: 42px;
  padding-top: 24px;
}

.chapter-turn-link {
  align-items: baseline;
  color: var(--ink);
  display: flex;
  gap: 8px;
  min-height: 44px;
  padding: 8px 0;
  text-decoration: none;
}

.chapter-turn-link small {
  color: var(--muted);
  display: block;
  flex-basis: 100%;
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .12em;
  line-height: 1;
  text-transform: uppercase;
}

.chapter-turn-link strong {
  font-size: 1.08rem;
  font-weight: 400;
}

.chapter-turn-link.previous {
  flex-wrap: wrap;
  grid-column: 1;
  justify-content: flex-start;
}

.chapter-turn-link.next {
  flex-wrap: wrap;
  grid-column: 2;
  justify-content: flex-end;
  text-align: right;
}

.chapter-turn-link.next small {
  text-align: right;
}

.chapter-float {
  pointer-events: none;
}

.chapter-float-link {
  align-items: center;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: 0 10px 28px rgba(23, 23, 23, .06);
  color: var(--ink);
  display: inline-flex;
  gap: 8px;
  min-height: 44px;
  opacity: .78;
  padding: 10px 12px;
  pointer-events: auto;
  position: fixed;
  text-decoration: none;
  top: 50%;
  transform: translateY(-50%);
  transition: opacity .18s ease, transform .18s ease;
  z-index: 10;
}

.chapter-float-link:hover,
.chapter-float-link:focus-visible {
  opacity: 1;
}

.chapter-float-link.previous {
  left: max(18px, calc((100vw - 1040px) / 2));
}

.chapter-float-link.next {
  right: max(18px, calc((100vw - 1040px) / 2));
}

.chapter-float-label {
  max-width: 0;
  overflow: hidden;
  white-space: nowrap;
  transition: max-width .18s ease;
}

.chapter-float-link:hover .chapter-float-label,
.chapter-float-link:focus-visible .chapter-float-label {
  max-width: 9rem;
}

.book-link:hover,
.chapter-tile:hover {
  border-color: var(--accent);
}

@media (max-width: 900px) {
  .reader {
    padding-bottom: 126px;
  }

  .chapter-turn {
    grid-template-columns: 1fr;
  }

  .chapter-turn-link,
  .chapter-turn-link.next {
    grid-column: 1;
    justify-content: flex-start;
    text-align: left;
  }

  .chapter-turn-link.next small {
    text-align: left;
  }

  .chapter-float {
    align-items: center;
    background: color-mix(in srgb, var(--paper) 92%, transparent);
    border-top: 1px solid var(--line);
    bottom: 0;
    display: grid;
    gap: 10px;
    grid-template-columns: 1fr 1fr;
    left: 0;
    padding: 10px 14px max(10px, env(safe-area-inset-bottom));
    pointer-events: auto;
    position: fixed;
    right: 0;
    z-index: 10;
  }

  .chapter-float-link {
    background: transparent;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    max-width: none;
    opacity: 1;
    padding: 8px 0;
    position: static;
    transform: none;
  }

  .chapter-float-link.previous {
    grid-column: 1;
    justify-content: flex-start;
    left: auto;
  }

  .chapter-float-link.next {
    grid-column: 2;
    justify-content: flex-end;
    right: auto;
    text-align: right;
  }

  .chapter-float-label {
    max-width: none;
  }
}