/* Author navigation bookshelf. Individual book-world headers retain their own UI. */
body .nav--bookshelf {
  --nav-menu-muted: var(--shell-muted,var(--berry-65));
  --nav-menu-line: var(--shell-line,var(--berry-15));
  --nav-menu-surface: var(--shell-surface,var(--cream));
}
body .nav--bookshelf .nav-disclosure { position: relative; }
body .nav--bookshelf .nav__links--bookshelf > li > a {
  font-size: 12px;
  font-weight: 450;
  padding: 12px 10px;
}
body .nav--bookshelf .nav__links--bookshelf > li > a.nav__cta {
  font-size: 12px;
  padding: 9px 16px;
  min-height: 36px;
  border-radius: 999px;
}
body .nav--bookshelf .nav-disclosure__toggle > span[aria-hidden="true"] { display: none; }
body .nav--bookshelf .nav-disclosure__toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 10px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--berry-80);
  font: 450 12px/1.25 var(--font-body);
  white-space: nowrap;
  cursor: pointer;
}
body .nav--bookshelf .nav-disclosure__toggle::after {
  content: "";
  width: 5px;
  height: 5px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
}
body .nav--bookshelf .nav-disclosure__toggle[aria-expanded="true"] { color: var(--berry); }
body .nav--bookshelf .nav-disclosure__toggle[aria-expanded="true"]::after { transform: translateY(1px) rotate(225deg); }
body .nav--bookshelf .nav-disclosure__toggle:hover { color: var(--berry); }
body .nav--bookshelf :is(a,button):focus-visible {
  outline: 2px solid var(--berry);
  outline-offset: 4px;
}
body .nav--bookshelf .nav-disclosure__panel {
  position: absolute;
  inset: calc(100% + 10px) auto auto 0;
  width: min(384px,calc(100vw - 48px));
  max-height: calc(100svh - 96px);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 14px;
  border: 1px solid var(--nav-menu-line);
  border-radius: 12px;
  background: var(--cream);
  color: var(--berry);
  box-shadow: 0 22px 64px -24px rgba(0,0,0,.30);
}
body .nav--bookshelf .nav-disclosure__panel[hidden] { display: none; }
body .nav--bookshelf [data-nav-disclosure="sebi"] .nav-disclosure__panel {
  width: 208px;
  padding: 10px;
}
body .nav--bookshelf .nav-books__heading {
  margin: 0 8px 12px;
  color: var(--nav-menu-muted);
  font-size: 13px;
  line-height: 1.4;
  font-weight: 500;
  letter-spacing: .01em;
}
body .nav--bookshelf .nav-books__list { display: grid; gap: 4px; }
body .nav--bookshelf .nav-book {
  display: grid;
  grid-template-columns: 38px minmax(0,1fr) 12px;
  gap: 12px;
  align-items: center;
  min-height: 72px;
  margin: 0;
  padding: 6px 8px;
  border-radius: 6px;
  color: var(--berry);
  font-size: 15px;
  line-height: 1.3;
  letter-spacing: 0;
  white-space: normal;
  text-decoration: none;
}
body .nav--bookshelf .nav-book:hover {
  background: var(--nav-menu-surface);
  color: var(--berry);
  text-decoration: none;
}
body .nav--bookshelf .nav-book__cover {
  display: block;
  width: 38px;
  aspect-ratio: var(--book-cover-ratio);
  border-radius: 2px;
  box-shadow: 0 3px 9px -5px rgba(0,0,0,.40);
}
body .nav--bookshelf .nav-book__cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 2px;
}
body .nav--bookshelf .nav-book__body { min-width: 0; }
body .nav--bookshelf .nav-book__details {
  display: block;
  margin-top: 4px;
  color: var(--nav-menu-muted);
  font-size: 11px;
  font-weight: 400;
  line-height: 1.5;
  white-space: normal;
  overflow-wrap: anywhere;
}
body .nav--bookshelf .nav-book__title {
  display: block;
  color: var(--berry);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0;
  white-space: normal;
  overflow-wrap: anywhere;
  hyphens: auto;
}
body .nav--bookshelf .nav-book__arrow {
  display: block;
  color: var(--nav-menu-muted);
  font-size: 17px;
  line-height: 1;
  text-align: right;
}
body .nav--bookshelf .nav-books__all {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  margin-top: 8px;
  padding: 12px 8px 0;
  border-top: 1px solid var(--nav-menu-line);
  border-radius: 0;
  color: var(--berry);
  font-size: 13px;
  line-height: 1.4;
  letter-spacing: 0;
}
body .nav--bookshelf .nav-personal { display: grid; gap: 2px; list-style: none; margin: 0; padding: 0; }
body .nav--bookshelf .nav-personal a {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 10px 12px;
  border-radius: 5px;
  color: var(--berry);
  font-size: 14px;
  line-height: 1.4;
}
body .nav--bookshelf .nav-personal a:hover { background: var(--nav-menu-surface); }
@media (min-width:1121px) {
  body .nav--bookshelf [data-nav-disclosure="books"] .nav-disclosure__panel { left: 50%; transform: translateX(-50%); }
}
@media (max-width:1120px) {
  .js body:not(.menu-open) .nav--bookshelf .nav__links--bookshelf { visibility: hidden; pointer-events: none; }
  .js body.menu-open .nav--bookshelf .nav__links--bookshelf { visibility: visible; pointer-events: auto; }
  body .nav--bookshelf .nav__links--bookshelf {
    width: min(92vw,440px);
    align-items: stretch;
    gap: 12px;
    padding: 88px 24px 32px;
    padding-bottom: max(32px,env(safe-area-inset-bottom));
    height: 100svh;
    height: 100dvh;
    max-height: 100svh;
    max-height: 100dvh;
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  body .nav--bookshelf .nav__links--bookshelf > li { flex-shrink: 0; width: 100%; }
  body .nav--bookshelf .nav__links--bookshelf > li > a {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding: 10px 0;
    font-size: 20px;
    line-height: 1.4;
  }
  body .nav--bookshelf .nav__links--bookshelf > li > a.nav__cta { justify-content: center; margin-top: 6px; padding: 13px 22px; font-size: 16px; }
  body .nav--bookshelf .nav-disclosure__toggle {
    width: 100%;
    justify-content: space-between;
    padding: 12px 0;
    border-radius: 0;
    font-size: 20px;
    line-height: 1.4;
    letter-spacing: -.025em;
  }
  body .nav--bookshelf [data-nav-disclosure="books"] > .nav-disclosure__toggle { display: none; }
  body .nav--bookshelf .nav-disclosure__panel,
  body .nav--bookshelf [data-nav-disclosure="sebi"] .nav-disclosure__panel {
    position: static;
    width: 100%;
    max-height: none;
    overflow: visible;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }
  body .nav--bookshelf .nav-books__heading { margin-inline: 0; }
  body .nav--bookshelf .nav-book { grid-template-columns: 36px minmax(0,1fr) 12px; }
  body .nav--bookshelf .nav-book__cover { width: 36px; }
  body .nav--bookshelf .nav-personal { padding: 0 0 8px; }
  body .nav--bookshelf .nav-personal a { min-height: 44px; padding: 10px 0; font-size: 17px; letter-spacing: -.015em; }
}
/* Every destination remains available when script support is absent. */
.no-js body .nav--bookshelf { position: static; }
.no-js body .nav--bookshelf .nav__inner { flex-wrap: wrap; height: auto; min-height: 64px; }
.no-js body .nav--bookshelf .nav__links--bookshelf {
  position: static;
  flex-basis: 100%;
  width: 100%;
  height: auto;
  max-height: none;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 20px;
  padding: 18px 0 24px;
  overflow: visible;
  transform: none;
}
.no-js body .nav--bookshelf .nav-disclosure__toggle,
.no-js body .nav--bookshelf .nav__toggle { display: none; }
.no-js body .nav--bookshelf .nav-disclosure__panel,
.no-js body .nav--bookshelf .nav-disclosure__panel[hidden] {
  display: block;
  position: static;
  width: 100%;
  max-height: none;
  left: auto;
  transform: none;
}
@media (min-width:1121px) {
  .no-js body .nav--bookshelf [data-nav-disclosure="books"] { width: min(384px,100%); }
  .no-js body .nav--bookshelf [data-nav-disclosure="sebi"] { width: 208px; }
}