.right-toc-toggle {
  position: fixed;
  top: 74px;
  right: 16px;
  z-index: 32;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  background: rgba(18, 18, 18, 0.84);
  color: #ececec;
  font-size: 12px;
  line-height: 1;
  padding: 8px 12px;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.right-toc-toggle:hover {
  background: rgba(28, 28, 28, 0.92);
}

.right-toc-toggle__icon {
  display: inline-block;
  transform: rotate(180deg);
  transition: transform 0.2s ease;
}

.book-body.right-toc-open .right-toc-toggle__icon {
  transform: rotate(0deg);
}

.right-toc-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.42);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 28;
}

.book-body.right-toc-mobile.right-toc-open .right-toc-backdrop {
  opacity: 1;
  pointer-events: auto;
}

.right-toc {
  position: fixed;
  top: 112px;
  right: 16px;
  width: 280px;
  max-height: calc(100vh - 128px);
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(20, 20, 20, 0.84);
  backdrop-filter: blur(4px);
  z-index: 30;
  opacity: 0;
  transform: translateX(calc(100% + 20px));
  pointer-events: none;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.book-body.right-toc-open .right-toc {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.right-toc__title {
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0 0 10px 0;
  color: #d4d4d4;
}

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

.right-toc__item {
  margin: 0;
}

.right-toc__item.level-2 {
  padding-left: 12px;
}

.right-toc__item.level-3 {
  padding-left: 24px;
}

.right-toc__link {
  display: block;
  padding: 4px 0;
  line-height: 1.35;
  font-size: 13px;
  color: #d8d8d8 !important;
  opacity: 0.72 !important;
  text-decoration: none !important;
}

.right-toc__link:hover {
  opacity: 1 !important;
}

.right-toc__link.is-active {
  opacity: 1 !important;
  color: #ffffff !important;
}

@media (min-width: 1181px) {
  .book-body.right-toc-enabled.right-toc-open .page-inner {
    padding-right: 320px !important;
  }
}

@media (max-width: 1400px) and (min-width: 1181px) {
  .right-toc {
    width: 236px;
  }

  .book-body.right-toc-enabled.right-toc-open .page-inner {
    padding-right: 274px !important;
  }
}

@media (max-width: 1180px) {
  .right-toc-toggle {
    top: 64px;
    right: 10px;
    padding: 8px 10px;
  }

  .right-toc {
    top: 102px;
    right: 10px;
    width: min(86vw, 320px);
    max-height: calc(100vh - 118px);
  }
}