/* Book Chapter Layout Styles */

/* Override wrapper width on desktop when chapter layout is present */
@media (min-width: 1024px) {
  .wrapper:has(.book-chapter-layout) {
    max-width: 1200px;
  }
}

.book-chapter-layout {
  display: block;
}

@media (min-width: 1024px) {
  .book-chapter-layout {
    display: flex;
    gap: 2rem;
  }
}

/* Left Sidebar: Chapter Navigation */
.chapter-sidebar {
  width: 260px;
  flex-shrink: 0;
  display: none;
}

@media (min-width: 1024px) {
  .chapter-sidebar {
    display: block;
  }
}

.chapter-nav-container {
  position: sticky;
  top: 20px;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  padding: 1rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 2px 8px var(--shadow-color);
}

.chapter-nav-container::-webkit-scrollbar {
  width: 4px;
}

.chapter-nav-container::-webkit-scrollbar-track {
  background: var(--bg-color);
  border-radius: 2px;
}

.chapter-nav-container::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 2px;
}

.chapter-nav-container::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-text);
}

.book-title-link {
  display: block;
  font-size: 1rem;
  font-weight: 600;
  color: var(--link-color) !important;
  text-decoration: none;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.book-title-link:hover {
  text-decoration: underline;
}

.chapter-nav-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--secondary-text) !important;
  margin: 0 0 0.75rem 0;
}

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

.chapter-list li {
  margin: 0;
  padding: 0;
}

.chapter-list a {
  display: block;
  padding: 0.4rem 0.5rem;
  font-size: 0.85rem;
  color: var(--text-color) !important;
  text-decoration: none;
  line-height: 1.4;
  transition: color 0.2s ease, background-color 0.2s ease;
  border-left: 2px solid transparent;
  border-radius: 0 4px 4px 0;
}

.chapter-list a:hover {
  color: var(--link-color) !important;
  background-color: var(--card-hover-bg, rgba(0,0,0,0.03));
}

.chapter-list a.active {
  color: var(--link-color) !important;
  border-left-color: var(--link-color);
  font-weight: 500;
  background-color: var(--card-hover-bg, rgba(0,0,0,0.03));
}

/* Main Content */
.chapter-main-content {
  flex: 1;
  min-width: 0;
}

.chapter-header {
  margin-bottom: 2rem;
}

.chapter-number {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--link-color);
  margin: 0 0 0.5rem 0;
}

.chapter-title {
  font-size: 2rem;
  margin: 0 0 0.5rem 0;
  line-height: 1.2;
}

.chapter-meta {
  font-size: 0.9rem;
  color: var(--secondary-text);
  margin: 0;
}

.chapter-content {
  line-height: 1.7;
}

/* Prev/Next Navigation */
.chapter-pagination {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.chapter-prev,
.chapter-next {
  display: flex;
  flex-direction: column;
  padding: 1rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  text-decoration: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  max-width: 45%;
}

.chapter-prev:hover,
.chapter-next:hover {
  border-color: var(--link-color);
  box-shadow: 0 2px 8px var(--shadow-color);
}

.chapter-prev.disabled,
.chapter-next.disabled {
  visibility: hidden;
}

.chapter-next {
  text-align: right;
  margin-left: auto;
}

.chapter-nav-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--secondary-text);
  margin-bottom: 0.25rem;
}

.chapter-prev .chapter-nav-label::before {
  content: "\2190 ";
}

.chapter-next .chapter-nav-label::after {
  content: " \2192";
}

.chapter-nav-name {
  font-size: 0.95rem;
  color: var(--link-color);
  font-weight: 500;
}

/* Mobile Chapter Nav */
.chapter-mobile {
  display: block;
  margin-bottom: 1.5rem;
}

@media (min-width: 1024px) {
  .chapter-mobile {
    display: none;
  }
}

.book-title-link-mobile {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--link-color) !important;
  text-decoration: none;
  margin-bottom: 0.75rem;
}

.book-title-link-mobile:hover {
  text-decoration: underline;
}

.chapter-mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-color);
  text-align: left;
  transition: background-color 0.2s ease;
}

.chapter-mobile-toggle:hover {
  background-color: var(--card-hover-bg, rgba(0,0,0,0.03));
}

.chapter-mobile-toggle-icon {
  transition: transform 0.2s ease;
  flex-shrink: 0;
  margin-left: 0.5rem;
}

.chapter-mobile-toggle[aria-expanded="true"] .chapter-mobile-toggle-icon {
  transform: rotate(180deg);
}

.chapter-mobile-content {
  display: none;
  padding: 1rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 8px 8px;
  margin-top: -1px;
}

.chapter-mobile-content.open {
  display: block;
}

.chapter-mobile-content .chapter-list a {
  padding: 0.5rem 0.5rem;
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .chapter-title {
    font-size: 1.5rem;
  }

  .chapter-pagination {
    flex-direction: column;
  }

  .chapter-prev,
  .chapter-next {
    max-width: 100%;
  }

  .chapter-next {
    text-align: left;
  }

  .chapter-next .chapter-nav-label::after {
    content: "";
  }

  .chapter-next .chapter-nav-label::before {
    content: "\2192 ";
  }
}