/* GitBook Styles */
/* Inter font is now loaded from fonts.css */

* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  margin: 0;
  padding: 0;
  color: #1f2937;
  background: #ffffff;
  line-height: 1.6;
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.book-header {
  background: white;
  border-bottom: 1px solid #e5e7eb;
  padding: 16px 40px;
  width: 100%;
  box-sizing: border-box;
  z-index: 150;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.book-header h1 {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  color: #111827;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 1;
  min-width: 0;
}

.theme-toggle {
  background: #f8f9fa;
  border: 1px solid #e9ecef;
  border-radius: 8px;
  padding: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  border-color: #d1d5db;
  background: #ffffff;
  transform: scale(1.05);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.theme-toggle:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.theme-icon {
  color: #6b7280;
  transition: all 0.3s ease;
  transform: scale(1);
}

.theme-toggle:hover .theme-icon {
  color: #374151;
  transform: scale(1.1) rotate(15deg);
}

.moon-icon {
  display: none;
  opacity: 0;
  transform: rotate(-30deg) scale(0.8);
  transition: all 0.3s ease;
}

.sun-icon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
  transition: all 0.3s ease;
}

[data-theme="dark"] .sun-icon {
  display: none;
  opacity: 0;
  transform: rotate(30deg) scale(0.8);
}

[data-theme="dark"] .moon-icon {
  display: block;
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.book-search {
  position: relative;
  width: 140px;
  max-width: 100%;
  flex-shrink: 1;
}

.search-input-container {
  position: relative;
  display: flex;
  align-items: center;
  background: #f8f9fa;
  border: 1px solid #e9ecef;
  border-radius: 8px;
  padding: 8px 12px;
  transition: all 0.2s ease;
  width: 100%;
  box-sizing: border-box;
}

.search-input-container:hover {
  border-color: #d1d5db;
  background: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.search-input-container:focus-within {
  border-color: #3b82f6;
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1), 0 2px 8px rgba(0, 0, 0, 0.05);
}

.search-icon {
  color: #6b7280;
  margin-right: 8px;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.search-input-container:hover .search-icon {
  color: #374151;
  transform: scale(1.1);
}

.search-input-container:focus-within .search-icon {
  color: #3b82f6;
  transform: scale(1.1);
}

.book-search input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 14px;
  color: #374151;
  padding: 0;
  margin: 0;
  min-width: 0;
  width: 0;
}

.book-search input::placeholder {
  color: #9ca3af;
}

.search-shortcut {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 8px;
  flex-shrink: 0;
  white-space: nowrap;
}

.shortcut-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
  color: #6b7280;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  transition: all 0.2s ease;
}

.search-input-container:hover .shortcut-key {
  border-color: #d1d5db;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.search-input-container:focus-within .shortcut-key {
  border-color: #3b82f6;
  color: #3b82f6;
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.1);
}

.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  max-height: 400px;
  overflow-y: auto;
  z-index: 1000;
  margin-top: 4px;
}

.search-result-item {
  padding: 12px 16px;
  border-bottom: 1px solid #f3f4f6;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.search-result-item:hover {
  background-color: #f9fafb;
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-title {
  font-weight: 600;
  color: #111827;
  font-size: 14px;
  margin-bottom: 4px;
}

.search-result-snippet {
  color: #6b7280;
  font-size: 12px;
  line-height: 1.4;
}

.search-result-highlight {
  background-color: #fef3c7;
  color: #92400e;
  padding: 1px 2px;
  border-radius: 2px;
}

.search-no-results {
  padding: 16px;
  text-align: center;
  color: #6b7280;
  font-size: 14px;
}

.book {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.book-summary {
  width: 300px;
  background: #f8fafc;
  border-right: 1px solid #e5e7eb;
  overflow-y: auto;
  position: relative;
  height: 100%;
  z-index: 100;
  flex-shrink: 0;
}

.book-summary nav {
  padding: 0;
  height: 100%;
}

.summary {
  list-style: none;
  margin: 0;
  padding: 20px 0;
  height: 100%;
}

.summary li {
  margin: 0;
  padding: 0;
}

.summary a {
  display: block;
  padding: 8px 20px;
  color: #374151;
  text-decoration: none;
  border-radius: 0;
  font-size: 14px;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.summary a:hover {
  background: #e5e7eb;
  color: #111827;
  border-left-color: #3b82f6;
}

.summary a.active {
  background: #eff6ff;
  color: #3b82f6;
  border-left-color: #3b82f6;
  font-weight: 600;
}

.summary .level-1 {
  font-weight: 600;
}

.summary .level-2 {
  margin-left: 16px;
  font-size: 13px;
}

.summary .level-3 {
  margin-left: 32px;
  font-size: 13px;
}

.book-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.body-inner {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.page-wrapper {
  flex: 1;
  overflow-y: auto;
  padding: 0;
}

.page-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px;
}

.page-content {
  font-size: 16px;
  line-height: 1.75;
}

/* Breadcrumb Navigation */
.breadcrumb-container {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid #e5e7eb;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: #6b7280;
  margin: 0;
  padding: 0;
}

.breadcrumb-link {
  color: #6b7280;
  text-decoration: none;
  transition: color 0.2s ease;
  font-weight: 500;
}

.breadcrumb-link:hover {
  color: #374151;
  text-decoration: underline;
}

.breadcrumb-separator {
  color: #9ca3af;
  font-size: 12px;
  margin: 0 4px;
  user-select: none;
}

.breadcrumb-current {
  color: #111827;
  font-weight: 600;
}

.page-content h1 {
  font-size: 32px;
  font-weight: 700;
  margin: 0 0 24px 0;
  color: #111827;
  border-bottom: 1px solid #e5e7eb;
  padding-bottom: 16px;
}

.page-content h2 {
  font-size: 24px;
  font-weight: 600;
  margin: 32px 0 16px 0;
  color: #111827;
}

.page-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 24px 0 12px 0;
  color: #111827;
}

.page-content h4 {
  font-size: 18px;
  font-weight: 600;
  margin: 20px 0 10px 0;
  color: #111827;
}

.page-content p {
  margin: 16px 0;
  color: #374151;
}

.page-content ul, .page-content ol {
  margin: 16px 0;
  padding-left: 24px;
}

.page-content li {
  margin: 8px 0;
  color: #374151;
}

.page-content blockquote {
  border-left: 4px solid #3b82f6;
  margin: 24px 0;
  padding: 16px 24px;
  background: #f8fafc;
  border-radius: 0 6px 6px 0;
  font-style: italic;
}

.page-content code {
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'SF Mono', Monaco, Consolas, monospace;
  font-size: 14px;
  color: #1f2937;
}

.page-content pre {
  background: #1f2937;
  color: #f9fafb;
  padding: 24px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 12px 0;
  font-family: 'SF Mono', Monaco, Consolas, monospace;
  font-size: 14px;
  line-height: 1.5;
}

.page-content pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* Code Block with Line Numbers */
.code-block-container {
  position: relative;
  margin: 12px 0; /* Reduced margin for tighter spacing */
  border-radius: 8px;
  overflow: hidden;
  background: #1f2937;
}

.line-numbers {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 60px;
  background: #ff0000 !important;
  border-right: 3px solid #00ff00 !important;
  padding: 24px 0;
  font-family: 'SF Mono', Monaco, Consolas, monospace;
  font-size: 16px !important;
  line-height: 1.5;
  text-align: right;
  user-select: none;
  overflow: hidden;
  z-index: 1000 !important;
}

.line-number {
  display: block;
  padding-right: 12px;
  color: #ffffff !important;
  font-weight: bold !important;
  background: #0000ff !important;
  margin: 2px 0 !important;
}

.with-line-numbers {
  margin: 0 !important;
  padding-left: 65px !important;
  padding-right: 24px !important;
  padding-top: 24px !important;
  padding-bottom: 24px !important;
  border-radius: 0 !important;
  background: transparent !important;
}

.callout {
  background: #f0f9ff;
  border: 1px solid #0ea5e9;
  border-radius: 8px;
  padding: 16px;
  margin: 24px 0;
  display: flex;
  align-items: flex-start;
}

.callout-icon {
  margin-right: 12px;
  font-size: 18px;
  line-height: 1;
}

.todo {
  display: flex;
  align-items: center;
  margin: 12px 0;
}

.todo input {
  margin-right: 12px;
  margin-top: 2px;
}

.divider {
  border: none;
  border-top: 1px solid #e5e7eb;
  margin: 32px 0;
}

.page-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.page-content figure {
  margin: 24px 0;
  text-align: center;
}

.page-content figcaption {
  font-size: 14px;
  color: #6b7280;
  margin-top: 12px;
  font-style: italic;
}

.page-content video {
  max-width: 100%;
  height: auto;
  margin: 24px 0;
  border-radius: 8px;
}

.file-download {
  background: #f9fafb;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  padding: 16px;
  margin: 24px 0;
}

.file-download a {
  color: #3b82f6;
  text-decoration: none;
  font-weight: 500;
}

.file-download a:hover {
  text-decoration: underline;
}

/* Bookmark card styles - full width by default */
.bookmark-card {
  background-color: #ffffff;
  border: 1px solid #e1e5e9;
  border-radius: 8px;
  margin: 16px 0;
  overflow: hidden;
  transition: all 0.2s ease;
  position: relative;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  display: flex;
  width: 100%;
  align-items: stretch;
  min-height: 120px;
}

.bookmark-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transform: translateY(-1px);
}

.bookmark-thumbnail {
  flex-shrink: 0;
  width: 160px;
  min-height: 120px;
  overflow: hidden;
  background-color: #f8f9fa;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bookmark-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.bookmark-content {
  flex: 1;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  min-height: 120px;
  align-self: stretch;
}

.bookmark-header {
  display: flex;
  align-items: flex-start;
  margin-bottom: 8px;
  flex-wrap: nowrap;
}

.bookmark-title {
  font-size: 16px;
  font-weight: 600;
  color: #1f2937;
  line-height: 1.4;
  margin: 0;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}

.bookmark-description {
  margin: 8px 0 12px 0;
  font-size: 14px;
  color: #6b7280;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}

.bookmark-caption {
  margin: 6px 0 8px 0;
  font-size: 14px;
  color: #4b5563;
  line-height: 1.4;
  font-style: italic;
}

.bookmark-footer {
  margin-top: auto;
  padding-top: 8px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  border-top: 1px solid #f3f4f6;
}

.bookmark-site {
  font-size: 12px;
  color: #3b82f6;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.bookmark-separator {
  font-size: 12px;
  color: #9ca3af;
  margin: 0 4px;
}

.bookmark-url {
  font-size: 12px;
  color: #9ca3af;
  font-weight: 400;
  text-decoration: none;
  word-break: break-all;
  flex: 1;
}

.bookmark-link {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  text-decoration: none;
}

.bookmark-card a {
  color: inherit;
  text-decoration: none;
}

/* Link preview styles - full width by default like Notion */
.link-preview {
  background-color: #ffffff;
  border: 1px solid #e1e5e9;
  border-radius: 8px;
  margin: 16px 0;
  overflow: hidden;
  transition: all 0.2s ease;
  position: relative;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  width: 100%;
}

.link-preview:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transform: translateY(-1px);
}

.preview-thumbnail {
  width: 100%;
  height: 180px;
  overflow: hidden;
  background-color: #f8f9fa;
  flex-shrink: 0;
}

.preview-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.preview-content {
  padding: 16px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.preview-header {
  display: flex;
  align-items: flex-start;
  margin-bottom: 10px;
}

.preview-icon {
  margin-right: 10px;
  font-size: 16px;
  margin-top: 2px;
  flex-shrink: 0;
}

.preview-title {
  font-size: 16px;
  font-weight: 600;
  color: #1f2937;
  line-height: 1.4;
  margin: 0;
  word-wrap: break-word;
  hyphens: auto;
}

.preview-description {
  margin: 8px 0 12px 0;
  font-size: 14px;
  color: #6b7280;
  line-height: 1.5;
  word-wrap: break-word;
  hyphens: auto;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.preview-footer {
  margin-top: 12px;
  padding-top: 8px;
  border-top: 1px solid #f3f4f6;
}

.preview-url {
  font-size: 12px;
  color: #9ca3af;
  font-weight: 400;
  text-decoration: none;
  word-break: break-all;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preview-link {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  text-decoration: none;
}

.link-preview a {
  color: inherit;
  text-decoration: none;
}

/* GitHub specific preview styles - full width by default */
.github-preview {
  display: block;
  margin: 16px 0;
}

.github-preview-link {
  display: block;
  text-decoration: none;
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.2s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.github-preview-link:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.github-thumbnail {
  display: block;
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
}

/* Responsive design for full-width cards */
@media (max-width: 768px) {
  .link-preview {
    margin: 12px 0;
  }
  
  .bookmark-card {
    margin: 12px 0;
    min-height: 100px;
  }
  
  .bookmark-thumbnail {
    width: 80px;
    min-height: 80px;
  }
  
  .bookmark-content {
    padding: 12px 16px;
    min-height: 80px;
  }
  
  .bookmark-title {
    font-size: 15px;
  }
  
  .bookmark-description {
    font-size: 13px;
  }
  
  .preview-thumbnail {
    height: 150px;
  }
  
  .github-thumbnail {
    height: 160px;
  }
}

@media (max-width: 480px) {
  .link-preview,
  .bookmark-card {
    margin: 8px 0;
  }
  
  .bookmark-card {
    flex-direction: column;
    min-height: auto;
  }
  
  .bookmark-thumbnail {
    width: 100%;
    min-height: 120px;
    flex-shrink: 0;
  }
  
  .bookmark-content {
    padding: 16px;
    min-height: auto;
  }
  
  .bookmark-header {
    margin-bottom: 10px;
  }
  
  .bookmark-title {
    font-size: 16px;
  }
  
  .preview-thumbnail {
    height: 120px;
  }
  
  .github-thumbnail {
    height: 140px;
  }
}

.embed iframe {
  width: 100%;
  height: 400px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  margin: 24px 0;
}

.child-page, .child-database {
  background: #f0f9ff;
  border: 1px solid #0ea5e9;
  border-radius: 8px;
  padding: 12px 16px;
  margin: 16px 0;
  font-weight: 500;
  color: #0c4a6e;
}

.unsupported-block {
  background: #fef2f2;
  border: 1px solid #fca5a5;
  border-radius: 8px;
  padding: 16px;
  margin: 24px 0;
  color: #dc2626;
  font-style: italic;
}

/* Color classes */
.color-gray { color: #6b7280; }
.color-brown { color: #92400e; }
.color-orange { color: #ea580c; }
.color-yellow { color: #d97706; }
.color-green { color: #16a34a; }
.color-blue { color: #2563eb; }
.color-purple { color: #9333ea; }
.color-pink { color: #e11d48; }
.color-red { color: #dc2626; }

/* Responsive design */
@media (max-width: 768px) {
  .book {
    position: relative;
  }
  
  .book-summary {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    transform: translateX(-100%);
    transition: transform 0.3s;
    z-index: 200;
  }
  
  .book-summary.open {
    transform: translateX(0);
  }
  
  .book-body {
    width: 100%;
  }
  
  .page-inner {
    padding: 20px;
  }
  
  .book-header {
    padding: 12px 20px;
  }
  
  .book-header h1 {
    font-size: 20px;
  }
  
  .header-controls {
    gap: 8px;
  }
  
  .book-search {
    width: 120px;
  }
  
  .theme-toggle {
    width: 32px;
    height: 32px;
    padding: 6px;
  }
}

@media (max-width: 480px) {
  .book-header {
    padding: 10px 16px;
  }
  
  .book-header h1 {
    font-size: 18px;
  }
  
  .book-search {
    width: 100px;
  }
  
  .search-shortcut {
    display: none;
  }
}

/* Bookmark fallback styles */
.bookmark-no-image {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.bookmark-default-icon {
  color: white;
  font-size: 32px;
  opacity: 0.9;
}

/* Print styles */
@media print {
  .book-summary {
    display: none;
  }
  
  .book-body {
    width: 100%;
  }
  
  .book-header {
    position: static;
    border-bottom: none;
  }
}

/* Table styles */
.notion-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.notion-table thead {
  background: #f8fafc;
}

.notion-table th,
.notion-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid #e2e8f0;
  vertical-align: top;
}

.notion-table th {
  font-weight: 600;
  color: #374151;
  background: #f8fafc;
  border-bottom: 2px solid #e2e8f0;
}

.notion-table tr:hover {
  background: #f9fafb;
}

.notion-table tr:last-child td {
  border-bottom: none;
}

.notion-table td {
  color: #4b5563;
}

/* Responsive table */
@media (max-width: 768px) {
  .notion-table {
    font-size: 14px;
  }
  
  .notion-table th,
  .notion-table td {
    padding: 8px 12px;
  }
}

/* Table of Contents - Right sidebar like Notion */
.page-toc {
  position: fixed;
  top: 80px;
  right: 0;
  width: 240px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  background: transparent;
  padding: 20px;
  font-size: 13px;
  z-index: 100;
}

.toc-header {
  font-weight: 600;
  color: #6b7280;
  margin-bottom: 12px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-toc .toc-item {
  margin: 0;
  padding: 0;
}

.page-toc .toc-link {
  display: block;
  padding: 4px 0;
  color: rgba(55, 53, 47, 0.6);
  text-decoration: none;
  line-height: 1.3;
  transition: color 0.15s ease;
  font-size: 13px;
  border-radius: 3px;
  padding-left: 8px;
  padding-right: 8px;
  margin-left: -8px;
  margin-right: -8px;
}

.page-toc .toc-link:hover {
  color: rgba(55, 53, 47, 0.8);
  background: rgba(55, 53, 47, 0.08);
}

.page-toc .toc-link.active {
  color: rgb(35, 131, 226);
  background: rgba(35, 131, 226, 0.1);
}

/* TOC nesting levels - Notion style with minimal indentation */
.page-toc .toc-level-1 {
  padding-left: 0;
}

.page-toc .toc-level-1 .toc-link {
  font-weight: 500;
  font-size: 13px;
}

.page-toc .toc-level-2 {
  padding-left: 12px;
}

.page-toc .toc-level-2 .toc-link {
  font-size: 12px;
}

.page-toc .toc-level-3 {
  padding-left: 24px;
}

.page-toc .toc-level-3 .toc-link {
  font-size: 12px;
}

.page-toc .toc-level-4 {
  padding-left: 36px;
}

.page-toc .toc-level-4 .toc-link {
  font-size: 11px;
}

.page-toc .toc-level-5 {
  padding-left: 48px;
}

.page-toc .toc-level-5 .toc-link {
  font-size: 11px;
}

.page-toc .toc-level-6 {
  padding-left: 60px;
}

.page-toc .toc-level-6 .toc-link {
  font-size: 11px;
}

/* Adjust main content to make room for TOC */
.book-body {
  padding-right: 260px;
}

/* Hide TOC on smaller screens */
@media (max-width: 1200px) {
  .page-toc {
    display: none;
  }
  
  .book-body {
    padding-right: 0;
  }
}

/* Mermaid Styles - Updated to work within code blocks */
.mermaid-container {
  /* Remove separate margins - inherit from parent code block */
  margin: 0;
  border: none;
  border-radius: 0;
  overflow: visible;
  background: transparent;
  clear: both;
  display: block;
}

/* Code Toolbar Styles */
.code-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: #374151;
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
  font-size: 12px;
  margin: 0;
  position: relative;
  z-index: 10; /* Above Mermaid content */
}

.mermaid-graph-container {
  padding: 20px;
  text-align: center;
  background: #ffffff;
  overflow: visible;
  word-wrap: break-word;
  overflow-wrap: break-word;
  border-radius: 0 0 8px 8px; /* Round bottom corners only */
  border: 1px solid #e5e7eb;
  border-top: none; /* No top border since it connects to toolbar */
  position: relative;
  z-index: 1; /* Below toolbar but above background */
  min-height: 150px; /* Minimum height for content */
}

.mermaid-graph-container svg {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* CSS Classes for JavaScript-created elements */
.code-line-numbers {
  position: absolute;
  left: 0;
  top: 40px;
  bottom: 0;
  width: 50px;
  background: #0f172a;
  border-right: 2px solid #475569;
  padding: 0;
  font-family: 'SF Mono', Monaco, Consolas, monospace;
  font-size: 15px;
  line-height: 1.7;
  text-align: right;
  user-select: none;
  z-index: 10;
  overflow: hidden;
}

.code-line-number {
  color: #94a3b8;
  font-weight: 500;
  padding-right: 12px;
  display: block;
  font-size: 15px;
  line-height: 1.7;
  height: 1.7em;
}

.code-toolbar-language {
  color: #9CA3AF;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.code-toolbar-buttons {
  display: flex;
  gap: 8px;
  align-items: center;
}

.code-toolbar-button {
  background: #374151;
  border: 1px solid #4B5563;
  border-radius: 4px;
  color: #D1D5DB;
  cursor: pointer;
  padding: 4px 8px;
  font-size: 14px;
  display: flex;
  align-items: center;
  transition: all 0.2s ease;
}

.code-toolbar-button:hover {
  background: #4B5563;
  border-color: #6B7280;
}

.code-block-wrapper {
  position: relative;
  margin: 12px 0;
  border-radius: 8px;
  overflow: hidden;
  background: #1f2937;
}

.pre-with-line-numbers {
  position: relative;
  padding-left: 65px;
  padding-top: 40px;
  padding-bottom: 20px;
  margin: 0;
  box-sizing: border-box;
  min-height: fit-content;
}

.code-block-with-line-numbers {
  display: block;
  vertical-align: top;
  transform: translateY(1px);
  font-family: 'SF Mono', Monaco, Consolas, monospace;
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
  padding: 0;
  min-height: 100%;
}

/* Mermaid hover overlay styles */
.mermaid-hover-overlay {
  position: absolute !important;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1000;
  pointer-events: none;
  border-radius: 8px;
}

.mermaid-graph-container:hover .mermaid-hover-overlay {
  opacity: 1;
  pointer-events: auto;
}

/* Mermaid zoom modal styles */
.mermaid-zoom-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  padding: 40px;
  box-sizing: border-box;
}

/* Ensure Mermaid diagram text is readable */
.mermaid-graph-container .node rect,
.mermaid-graph-container .node circle,
.mermaid-graph-container .node ellipse,
.mermaid-graph-container .node polygon {
  stroke: #374151;
  stroke-width: 1px;
}

.mermaid-graph-container .node .label {
  color: #1f2937;
}

.mermaid-toggle-btn {
  display: block;
  width: 100%;
  padding: 8px 16px;
  background: #f9fafb;
  border: none;
  border-bottom: 1px solid #e5e7eb;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  color: #374151;
  text-align: left;
  transition: background-color 0.2s ease;
}

.mermaid-toggle-btn:hover {
  background: #f3f4f6;
}

.mermaid-container pre {
  margin: 0;
  border: none;
  border-bottom-left-radius: 8px;
  border-bottom-right-radius: 8px;
  overflow-x: auto;
}

.mermaid-graph {
  padding: 20px;
  text-align: center;
  background: #ffffff;
  overflow: hidden;
}

.mermaid-graph svg {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.mermaid-error {
  color: #dc2626;
  background: #fef2f2;
  padding: 12px;
  border-radius: 6px;
  border: 1px solid #fecaca;
  font-size: 14px;
}

/* Dark Theme Styles */
[data-theme="dark"] {
  color-scheme: dark;
}

[data-theme="dark"] body {
  background: #0d1117;
  color: #f0f6fc;
}

[data-theme="dark"] .book-header {
  background: #161b22;
  border-bottom: 1px solid #30363d;
}

[data-theme="dark"] .book-header h1 {
  color: #f0f6fc;
}

[data-theme="dark"] .theme-toggle {
  background: #21262d;
  border-color: #30363d;
}

[data-theme="dark"] .theme-toggle:hover {
  background: #30363d;
  border-color: #484f58;
  transform: scale(1.05);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .theme-toggle:focus {
  border-color: #58a6ff;
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.1);
}

[data-theme="dark"] .theme-icon {
  color: #8b949e;
}

[data-theme="dark"] .theme-toggle:hover .theme-icon {
  color: #f0f6fc;
  transform: scale(1.1) rotate(15deg);
}

[data-theme="dark"] .search-input-container {
  background: #21262d;
  border-color: #30363d;
}

[data-theme="dark"] .search-input-container:hover {
  border-color: #484f58;
  background: #30363d;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .search-input-container:focus-within {
  border-color: #58a6ff;
  background: #30363d;
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.1), 0 2px 8px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .search-icon {
  color: #8b949e;
}

[data-theme="dark"] .search-input-container:hover .search-icon {
  color: #f0f6fc;
  transform: scale(1.1);
}

[data-theme="dark"] .search-input-container:focus-within .search-icon {
  color: #58a6ff;
  transform: scale(1.1);
}

[data-theme="dark"] .book-search input {
  color: #f0f6fc;
}

[data-theme="dark"] .book-search input::placeholder {
  color: #8b949e;
}

[data-theme="dark"] .shortcut-key {
  background: #30363d;
  border-color: #484f58;
  color: #8b949e;
}

[data-theme="dark"] .search-input-container:hover .shortcut-key {
  border-color: #6e7681;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .search-input-container:focus-within .shortcut-key {
  border-color: #58a6ff;
  color: #58a6ff;
  box-shadow: 0 0 0 1px rgba(88, 166, 255, 0.1);
}

[data-theme="dark"] .search-results {
  background: #21262d;
  border-color: #30363d;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .search-result-item {
  border-bottom-color: #30363d;
}

[data-theme="dark"] .search-result-item:hover {
  background: #30363d;
}

[data-theme="dark"] .search-result-title {
  color: #f0f6fc;
}

[data-theme="dark"] .search-result-snippet {
  color: #8b949e;
}

[data-theme="dark"] .search-result-highlight {
  background: #ffd33d;
  color: #24292f;
}

[data-theme="dark"] .search-no-results {
  color: #8b949e;
}

[data-theme="dark"] .book-summary {
  background: #0d1117;
  border-right-color: #30363d;
}

[data-theme="dark"] .summary a {
  color: #f0f6fc;
}

[data-theme="dark"] .summary a:hover {
  background: #21262d;
  color: #58a6ff;
  border-left-color: #58a6ff;
}

[data-theme="dark"] .summary a.active {
  background: #0d419d;
  color: #58a6ff;
  border-left-color: #58a6ff;
}

[data-theme="dark"] .page-content {
  color: #f0f6fc;
}

/* Dark theme breadcrumb styles */
[data-theme="dark"] .breadcrumb-container {
  border-bottom-color: #30363d;
}

[data-theme="dark"] .breadcrumb-link {
  color: #8b949e;
}

[data-theme="dark"] .breadcrumb-link:hover {
  color: #f0f6fc;
}

[data-theme="dark"] .breadcrumb-separator {
  color: #6e7681;
}

[data-theme="dark"] .breadcrumb-current {
  color: #f0f6fc;
}

[data-theme="dark"] .page-content h1,
[data-theme="dark"] .page-content h2,
[data-theme="dark"] .page-content h3,
[data-theme="dark"] .page-content h4 {
  color: #f0f6fc;
}

[data-theme="dark"] .page-content h1 {
  border-bottom-color: #30363d;
}

[data-theme="dark"] .page-content p,
[data-theme="dark"] .page-content li {
  color: #e6edf3;
}

[data-theme="dark"] .page-content blockquote {
  border-left-color: #58a6ff;
  background: #161b22;
}

[data-theme="dark"] .page-content code {
  background: #161b22;
  color: #f0f6fc;
}

[data-theme="dark"] .page-content pre {
  background: #161b22;
  color: #e6edf3;
}

/* Dark theme line numbers */
[data-theme="dark"] .code-block-container {
  background: #161b22;
}

[data-theme="dark"] .line-numbers {
  background: #0d1117;
  border-right-color: #21262d;
}

[data-theme="dark"] .line-number {
  color: #8b949e;
}

[data-theme="dark"] .callout {
  background: #0d419d;
  border-color: #58a6ff;
}

[data-theme="dark"] .divider {
  border-top-color: #30363d;
}

[data-theme="dark"] .page-content img {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .page-content figcaption {
  color: #8b949e;
}

[data-theme="dark"] .file-download {
  background: #161b22;
  border-color: #30363d;
}

[data-theme="dark"] .file-download a {
  color: #58a6ff;
}

[data-theme="dark"] .bookmark-card {
  background: #161b22;
  border-color: #30363d;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .bookmark-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .bookmark-thumbnail {
  background: #21262d;
}

[data-theme="dark"] .bookmark-title {
  color: #f0f6fc;
}

[data-theme="dark"] .bookmark-description {
  color: #8b949e;
}

[data-theme="dark"] .bookmark-caption {
  color: #e6edf3;
}

[data-theme="dark"] .bookmark-footer {
  border-top-color: #30363d;
}

[data-theme="dark"] .bookmark-site {
  color: #58a6ff;
}

[data-theme="dark"] .bookmark-separator,
[data-theme="dark"] .bookmark-url {
  color: #8b949e;
}

[data-theme="dark"] .link-preview {
  background: #161b22;
  border-color: #30363d;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .link-preview:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .preview-thumbnail {
  background: #21262d;
}

[data-theme="dark"] .preview-title {
  color: #f0f6fc;
}

[data-theme="dark"] .preview-description {
  color: #8b949e;
}

[data-theme="dark"] .preview-footer {
  border-top-color: #30363d;
}

[data-theme="dark"] .preview-url {
  color: #8b949e;
}

[data-theme="dark"] .embed iframe {
  border-color: #30363d;
}

[data-theme="dark"] .child-page,
[data-theme="dark"] .child-database {
  background: #0d419d;
  border-color: #58a6ff;
  color: #58a6ff;
}

[data-theme="dark"] .unsupported-block {
  background: #2d1b1b;
  border-color: #f85149;
  color: #f85149;
}

[data-theme="dark"] .notion-table {
  background: #161b22;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .notion-table thead {
  background: #21262d;
}

[data-theme="dark"] .notion-table th {
  color: #f0f6fc;
  background: #21262d;
  border-bottom-color: #30363d;
}

[data-theme="dark"] .notion-table td {
  color: #e6edf3;
  border-bottom-color: #30363d;
}

[data-theme="dark"] .notion-table tr:hover {
  background: #21262d;
}

[data-theme="dark"] .page-toc {
  background: transparent;
}

[data-theme="dark"] .toc-header {
  color: #8b949e;
}

[data-theme="dark"] .page-toc .toc-link {
  color: rgba(240, 246, 252, 0.6);
}

[data-theme="dark"] .page-toc .toc-link:hover {
  color: rgba(240, 246, 252, 0.8);
  background: rgba(240, 246, 252, 0.08);
}

[data-theme="dark"] .page-toc .toc-link.active {
  color: #58a6ff;
  background: rgba(88, 166, 255, 0.1);
}

[data-theme="dark"] .mermaid-container {
  border-color: #30363d;
  background: #161b22;
}

[data-theme="dark"] .mermaid-graph-container {
  background: #0d1117;
  border-color: #30363d;
}

/* Update Mermaid diagram node colors for dark theme */
[data-theme="dark"] .mermaid-graph-container .node rect,
[data-theme="dark"] .mermaid-graph-container .node circle,
[data-theme="dark"] .mermaid-graph-container .node ellipse,
[data-theme="dark"] .mermaid-graph-container .node polygon {
  stroke: #7d8590;
  stroke-width: 1px;
}

[data-theme="dark"] .mermaid-graph-container .node .label {
  color: #e6edf3;
}

/* Copy button in toolbars dark theme */
[data-theme="dark"] .copy-button,
[data-theme="dark"] .code-toolbar-button.copy-button {
  background: #21262d;
  color: #7d8590;
  border-color: #30363d;
}

[data-theme="dark"] .copy-button:hover,
[data-theme="dark"] .code-toolbar-button.copy-button:hover {
  background: #30363d;
  color: #e6edf3;
  border-color: #484f58;
}

/* Dark theme code toolbar */
[data-theme="dark"] .code-toolbar {
  background: #0d1117;
  border-bottom-color: #21262d;
}

/* Dark theme code elements */
[data-theme="dark"] .code-line-numbers {
  background: #010409;
  border-right-color: #21262d;
}

[data-theme="dark"] .code-line-number {
  color: #7d8590;
}

[data-theme="dark"] .code-toolbar-language {
  color: #7d8590;
}

[data-theme="dark"] .code-toolbar-button {
  background: #21262d;
  border-color: #30363d;
  color: #e6edf3;
}

[data-theme="dark"] .code-toolbar-button:hover {
  background: #30363d;
  border-color: #484f58;
}

[data-theme="dark"] .code-block-wrapper {
  background: #0d1117;
}

[data-theme="dark"] .mermaid-toggle-btn {
  background: #21262d;
  border-bottom-color: #30363d;
  color: #c9d1d9;
}

[data-theme="dark"] .mermaid-toggle-btn:hover {
  background: #30363d;
}

[data-theme="dark"] .mermaid-graph {
  background: #0d1117;
}

[data-theme="dark"] .mermaid-error {
  color: #f85149;
  background: #490202;
  border-color: #da3633;
}

[data-theme="dark"] .mermaid-hover-overlay {
  background: rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .mermaid-zoom-modal {
  background: rgba(0, 0, 0, 0.95);
}

/* Spotlight Search Modal Styles */
.spotlight-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  display: none;
  animation: fadeIn 0.15s ease-out;
}

.spotlight-modal.active {
  display: flex;
}

.spotlight-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.spotlight-container {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  width: 100%;
  height: 100%;
  padding: 15vh 20px 20px;
  box-sizing: border-box;
}

.spotlight-search-box {
  width: 100%;
  max-width: 640px;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 16px 70px rgba(0, 0, 0, 0.2), 0 4px 20px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  animation: slideIn 0.2s ease-out;
  transform-origin: center top;
}

.spotlight-input-container {
  display: flex;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid #e5e7eb;
  background: #ffffff;
}

.spotlight-search-icon {
  color: #6b7280;
  margin-right: 16px;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.spotlight-input-container:focus-within .spotlight-search-icon {
  color: #3b82f6;
  transform: scale(1.05);
}

.spotlight-input-container input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 20px;
  font-weight: 400;
  color: #111827;
  line-height: 1.4;
  min-width: 0;
}

.spotlight-input-container input::placeholder {
  color: #9ca3af;
}

.spotlight-shortcut {
  display: flex;
  align-items: center;
  margin-left: 16px;
  flex-shrink: 0;
}

.spotlight-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  background: #f3f4f6;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.spotlight-results {
  max-height: 70vh;
  overflow-y: auto;
  background: #ffffff;
}

.spotlight-result-item {
  display: flex;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid #f3f4f6;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.spotlight-result-item:hover,
.spotlight-result-item.selected {
  background-color: #f8fafc;
}

.spotlight-result-item:last-child {
  border-bottom: none;
}

.spotlight-result-icon {
  width: 40px;
  height: 40px;
  background: #f0f9ff;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 16px;
  flex-shrink: 0;
}

.spotlight-result-icon svg {
  width: 20px;
  height: 20px;
  color: #3b82f6;
}

.spotlight-result-content {
  flex: 1;
  min-width: 0;
}

.spotlight-result-title {
  font-size: 16px;
  font-weight: 600;
  color: #111827;
  line-height: 1.4;
  margin: 0 0 4px 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.spotlight-result-snippet {
  font-size: 14px;
  color: #6b7280;
  line-height: 1.4;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.spotlight-result-highlight {
  background-color: #fef3c7;
  color: #92400e;
  padding: 1px 2px;
  border-radius: 2px;
  font-weight: 600;
}

.spotlight-no-results {
  padding: 40px 24px;
  text-align: center;
  color: #6b7280;
  font-size: 16px;
}

.spotlight-no-results svg {
  width: 48px;
  height: 48px;
  color: #d1d5db;
  margin-bottom: 16px;
}

/* Dark theme for Spotlight */
[data-theme="dark"] .spotlight-backdrop {
  background: rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .spotlight-search-box {
  background: #1f2937;
  box-shadow: 0 16px 70px rgba(0, 0, 0, 0.4), 0 4px 20px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .spotlight-input-container {
  background: #1f2937;
  border-bottom-color: #374151;
}

[data-theme="dark"] .spotlight-search-icon {
  color: #9ca3af;
}

[data-theme="dark"] .spotlight-input-container:focus-within .spotlight-search-icon {
  color: #58a6ff;
  transform: scale(1.05);
}

[data-theme="dark"] .spotlight-input-container input {
  color: #f9fafb;
}

[data-theme="dark"] .spotlight-input-container input::placeholder {
  color: #6b7280;
}

[data-theme="dark"] .spotlight-key {
  background: #374151;
  border-color: #4b5563;
  color: #d1d5db;
}

[data-theme="dark"] .spotlight-results {
  background: #1f2937;
}

[data-theme="dark"] .spotlight-result-item {
  border-bottom-color: #374151;
}

[data-theme="dark"] .spotlight-result-item:hover,
[data-theme="dark"] .spotlight-result-item.selected {
  background-color: #374151;
}

[data-theme="dark"] .spotlight-result-icon {
  background: #1e40af;
  border-color: #3b82f6;
}

[data-theme="dark"] .spotlight-result-icon svg {
  color: #60a5fa;
}

[data-theme="dark"] .spotlight-result-title {
  color: #f9fafb;
}

[data-theme="dark"] .spotlight-result-snippet {
  color: #9ca3af;
}

[data-theme="dark"] .spotlight-result-highlight {
  background: #fbbf24;
  color: #92400e;
}

[data-theme="dark"] .spotlight-no-results {
  color: #9ca3af;
}

[data-theme="dark"] .spotlight-no-results svg {
  color: #4b5563;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(-20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Responsive */
@media (max-width: 768px) {
  .spotlight-container {
    padding: 10vh 16px 16px;
  }
  
  .spotlight-search-box {
    border-radius: 12px;
  }
  
  .spotlight-input-container {
    padding: 16px 20px;
  }
  
  .spotlight-input-container input {
    font-size: 18px;
  }
  
  .spotlight-result-item {
    padding: 14px 20px;
  }
  
  .spotlight-result-icon {
    width: 36px;
    height: 36px;
    margin-right: 12px;
  }
  
  .spotlight-result-icon svg {
    width: 18px;
    height: 18px;
  }
}