#simple-toc {
  position: fixed;
  top: 100px;
  right: 10px;
  width: 250px;
  background-color: #f8f9fa;
  border: 1px solid #dee2e6;
  border-radius: 5px;
  padding: 15px;
  z-index: 9999;
  max-height: 80vh;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  
  display: flex;
  flex-direction: column;
}

#simple-toc-nav {
  overflow-y: auto;
  flex-grow: 1;
  padding-right: 0px;
}

#simple-toc ul {
  list-style: none;
  padding-left: 15px;
  margin-bottom: 0;
  font-size: 0.9em;
}

#simple-toc .toc-level-1 {
  padding-left: 0;
}

#simple-toc a {
  text-decoration: none;
  color: #0056b3;
  display: block;
  margin-bottom: 6px;
}

#simple-toc a:hover {
  text-decoration: underline;
}

/* Hide all nested sub-headings by default */
#simple-toc ul.toc-level-2,
#simple-toc ul.toc-level-3 {
  display: none;
}

/* Expand the sub-headings only when the parent is active */
#simple-toc li.active-li ul {
  display: block;
}

/* Make the currently viewed link stand out */
#simple-toc a.active-link {
  font-weight: 700;
  color: #212529; /* Darker text for active link */
}



/* Hide the GitHub-only warning message from the pkgdown website */
#github-only-warning {
  display: none !important;
}




/* 1. Start defining code to hide toc*/
#simple-toc {
  transition: all 0.3s ease; 
}

/* 2. Style the arrow and place it in the top right of the TOC box */
#toc-arrow-btn {
  position: absolute;
  top: 10px;   
  right: 10px;  
  background: none;
  border: none;
  font-size: 16px;
  cursor: pointer;
  color: #666; 
  z-index: 1050; 
}

#toc-arrow-btn:hover {
  color: #000; 
}

/* 3. Hide the text and links when the toc-hidden class is active */
.toc-hidden h5, 
.toc-hidden #simple-toc-nav {
  display: none !important; 
}

/* 4. Shrink the main box into a tiny square when hidden */
.toc-hidden {
  width: 40px !important;
  height: 40px !important;
  padding: 0 !important; /* Removes your 15px padding so it can shrink */
  min-width: 0 !important;
  overflow: hidden;
}

/* Re-center the arrow perfectly inside the tiny square */
.toc-hidden #toc-arrow-btn {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  right: auto;
}