arcaneTocTreeLinesCss top-level constant

String const arcaneTocTreeLinesCss

CSS styles for ArcaneToc tree-line visual connectors.

Include this in your stylesheet's baseCss for tree-line styling. Provides comprehensive tree visualization with proper vertical/horizontal line connectors, scrollbar styling, and active state highlighting.

Implementation

const String arcaneTocTreeLinesCss = '''
/* ============================================
   TABLE OF CONTENTS - Tree Line Styles
   Clean tree view with subtle connecting lines
   ============================================ */

/* Scrollbar styling for TOC container */
.kb-toc,
.toc-container {
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.kb-toc::-webkit-scrollbar,
.toc-container::-webkit-scrollbar {
  width: 4px;
}

.kb-toc::-webkit-scrollbar-track,
.toc-container::-webkit-scrollbar-track {
  background: transparent;
}

.kb-toc::-webkit-scrollbar-thumb,
.toc-container::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

/* TOC content with tree lines */
.toc-content ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
  position: relative;
}

/* Top-level list gets tree line padding */
.toc-content > ul {
  padding-left: 0.75rem;
  margin-left: 0.25rem;
}

/* Nested lists */
.toc-content ul ul {
  padding-left: 0.875rem;
  margin-left: 0.375rem;
  margin-top: 0.25rem;
  position: relative;
}

/* All list items */
.toc-content li {
  position: relative;
}

/* Horizontal branch for top-level items */
.toc-content > ul > li::before {
  content: '';
  position: absolute;
  left: -0.5rem;
  top: 50%;
  width: 0.375rem;
  height: 1px;
  background: var(--border);
}

/* Vertical line segment for top-level items (not last) */
.toc-content > ul > li:not(:last-child)::after {
  content: '';
  position: absolute;
  left: -0.5rem;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

/* Last top-level item - vertical line only to center (L-bend) */
.toc-content > ul > li:last-child::after {
  content: '';
  position: absolute;
  left: -0.5rem;
  top: 0;
  height: 50%;
  width: 1px;
  background: var(--border);
}

/* Horizontal branch for nested items */
.toc-content ul ul li::before {
  content: '';
  position: absolute;
  left: -0.875rem;
  top: 50%;
  width: 0.5rem;
  height: 1px;
  background: var(--border);
}

/* Vertical line segment for nested items (not last) */
.toc-content ul ul li:not(:last-child)::after {
  content: '';
  position: absolute;
  left: -0.875rem;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

/* Last nested item - vertical line only to center (L-bend) */
.toc-content ul ul li:last-child::after {
  content: '';
  position: absolute;
  left: -0.875rem;
  top: 0;
  height: 50%;
  width: 1px;
  background: var(--border);
}

/* Single child - show dot instead of tree lines */
.toc-content > ul:has(> li:only-child) > li::before,
.toc-content > ul:has(> li:only-child) > li::after {
  display: none;
}

.toc-content ul ul:has(> li:only-child) > li::before,
.toc-content ul ul:has(> li:only-child) > li::after {
  display: none;
}

/* Link styling */
.toc-content a {
  color: var(--muted-foreground);
  text-decoration: none;
  font-size: 0.8125rem;
  line-height: 1.3;
  display: block;
  margin-left: 0.125rem;
  padding: 0.5rem 0.75rem 0.5rem 0.625rem !important;
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, background 0.15s ease;
}

.toc-content a:hover {
  color: var(--foreground);
  background: var(--muted);
}

/* Active TOC link */
.toc-content a.toc-active {
  color: var(--foreground);
  font-weight: 500;
  background: var(--muted);
}

/* Nested link sizing */
.toc-content ul ul a {
  font-size: 0.8125rem;
  line-height: 1.3;
  padding: 0.5rem 0.75rem 0.5rem 0.625rem !important;
}

/* Fading tree lines at deeper nesting levels */
.toc-content ul ul li::before,
.toc-content ul ul li::after {
  background: color-mix(in srgb, var(--border) 70%, transparent);
}

.toc-content ul ul ul li::before,
.toc-content ul ul ul li::after {
  background: color-mix(in srgb, var(--border) 50%, transparent);
}

''';