/* Chapter Navigation Styles */
:root {
  --chapter-nav-width: 264px;
  --chapter-nav-text-color: #1a1a1a;
  --chapter-nav-text-faded: rgba(51, 51, 51, 0.65);
  --chapter-nav-active-color: #991b1b;
  --chapter-text-size: 0.85rem;
  --content-gap: 80px;
}

/* Container for the floating navigation */
.chapter-nav-container {
  position: relative;
  width: 100%;
}

/* Floating navigation styles - clean and minimal */
.chapter-navigation {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--chapter-nav-width);
  height: 100vh;
  overflow-y: auto;
  background-color: #fff;
  padding: 40px 20px 60px 20px;
  z-index: 100;
  scrollbar-width: thin; /* Show thin scrollbar for Firefox */
  scrollbar-color: rgba(0, 0, 0, 0.2) transparent;
  transition: transform 0.3s ease;
  border: 0 none transparent !important;
  box-shadow: none !important;
  outline: none !important;
  -webkit-box-shadow: none !important;
  -moz-box-shadow: none !important;
}

/* Show thin scrollbar for Chrome, Safari and Opera */
.chapter-navigation::-webkit-scrollbar {
  width: 4px;
}

.chapter-navigation::-webkit-scrollbar-track {
  background: transparent;
}

.chapter-navigation::-webkit-scrollbar-thumb {
  background-color: rgba(0, 0, 0, 0.2);
  border-radius: 2px;
}

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

.chapter-nav-item {
  margin-bottom: 12px;
  transition: all 0.3s ease;
}

.chapter-nav-link {
  display: block;
  padding: 6px 0;
  font-size: var(--chapter-text-size);
  color: var(--chapter-nav-text-faded);
  text-decoration: none;
  transition: color 0.2s ease, text-decoration 0.2s ease;
  background-color: transparent;
  border-radius: 0;
  line-height: 1.4;
  /* Better text handling for long titles */
  word-wrap: break-word;
  overflow-wrap: break-word;
  hyphens: auto;
}

.chapter-nav-link:hover {
  color: var(--chapter-nav-text-color);
}

.chapter-nav-item.active .chapter-nav-link {
  /* Use color and underline instead of font-size to prevent jumping */
  font-size: var(--chapter-text-size);
  color: var(--chapter-nav-active-color);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Mobile dropdown styles - native-looking and minimal */
.mobile-chapter-nav {
  display: none;
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background-color: #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
  padding: 8px 12px;
}

.mobile-chapter-dropdown {
  position: relative;
}

.chapter-dropdown-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 10px 12px;
  background-color: #fff;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.chapter-dropdown-btn:hover,
.chapter-dropdown-btn:focus {
  border-color: rgba(0, 0, 0, 0.2);
  outline: none;
}

.current-chapter {
  font-weight: 500;
}

.dropdown-icon {
  transition: transform 0.3s ease;
  opacity: 0.6;
}

.chapter-dropdown-btn.active .dropdown-icon {
  transform: rotate(180deg);
  opacity: 0.9;
}

.chapter-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: #fff;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  margin-top: 4px;
  z-index: 101;
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid rgba(0, 0, 0, 0.1);
  display: none; /* Initially hidden */
}

.chapter-dropdown-menu ul {
  list-style: none;
  padding: 8px 0;
  margin: 0;
}

.chapter-dropdown-menu li {
  padding: 0;
}

.chapter-dropdown-menu a {
  display: block;
  padding: 10px 12px;
  color: var(--chapter-nav-text-faded);
  text-decoration: none;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.chapter-dropdown-menu a:hover,
.chapter-dropdown-menu a:focus {
  background-color: rgba(0, 0, 0, 0.05);
  color: var(--chapter-nav-text-color);
  outline: none;
}

.chapter-dropdown-menu li.active a {
  font-weight: 500;
  color: var(--chapter-nav-active-color);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Add padding to the content to prevent floating nav from overlapping */
/* Content fills the space to the right of the sidebar, article centers within it */
.chapter-content {
  /* Position content to start right after the sidebar */
  margin-left: var(--chapter-nav-width);
  margin-right: 0;
  /* Override Tailwind container max-width so content fills available space */
  max-width: none !important;
  width: auto !important;
  /* Remove horizontal padding - let the article's mx-auto handle centering */
  padding-left: 0;
  padding-right: 0;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
  .chapter-content {
    margin-left: var(--chapter-nav-width);
    margin-right: 0;
  }
}

@media (max-width: 768px) {
  .chapter-navigation {
    display: none;
  }
  
  .mobile-chapter-nav {
    display: block;
  }
  
  .chapter-content {
    margin-left: 20px;
    margin-right: 20px;
    padding-left: 0;
    padding-right: 0;
  }
}

/* Hide nav when printing - let browser print dialog control all margins */
@media print {
  .chapter-navigation,
  .mobile-chapter-nav {
    display: none;
  }
  
  .chapter-content {
    /* Remove all margins and padding so browser print dialog controls page margins */
    margin-left: 0 !important;
    margin-right: 0 !important;
    padding-left: 0 !important;
    padding-right: 0 !important;
    max-width: 100% !important;
    width: 100% !important;
  }
}