/* --- Table of Contents (TOC) Component --- */

/* 1. Mobile & Medium Screens (Default / Inline) */
.toc {
  background-color: #f8f9fa;
  border: 1px solid #e9ecef;
  border-radius: 8px;
  padding: 1rem 1.5rem;
  margin: 1.5rem 0 2rem 0;
  display: inline-block;
  min-width: 200px;
  max-width: 100%;
}

.toc h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 0;
  margin-bottom: 0.75rem;
  border-bottom: 2px solid #e9ecef;
  padding-bottom: 0.5rem;
  color: #343a40;
}

.toc ul {
  padding-left: 1.5rem;
  margin-bottom: 0;
}

.toc li {
  margin-bottom: 0.25rem;
}

.toc a {
  color: #495057;
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.toc a:hover {
  color: #007bff;
  text-decoration: underline;
}

/* 2. Large Screens (Desktops >= 1200px) */
@media (min-width: 1200px) {
  
  /* HIDE the inline TOC inserted by the shortcode inside the article */
  .blog-post .toc {
    display: none !important;
  }

  /* Style the Sidebar TOC container */
  .sidebar-toc {
    position: -webkit-sticky;
    position: sticky;
    top: 100px; /* Offset from top value */
    
    padding-left: 20px;
    border-left: 2px solid #f1f3f5; /* Subtle vertical line */
    margin-top: 20px;
    max-height: 85vh;
    overflow-y: auto;
  }

  .sidebar-toc-title {
    font-size: 1.1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #6c757d; /* Darker for better contrast */
    margin-top: 0;
    margin-bottom: 1rem;
  }

  .sidebar-toc nav#TableOfContents > ul {
    list-style: none; /* Remove bullets */
    padding-left: 0;
  }

  .sidebar-toc ul {
    list-style: none;
    padding-left: 0;
  }

  .sidebar-toc ul ul {
    padding-left: 1rem;
    margin-top: 6px;
    /* Sub-items don't need borders */
  }

  .sidebar-toc li {
    margin-bottom: 8px; /* More spacing */
    line-height: 1.5;
  }

  .sidebar-toc a {
    display: block;
    color: #495057; /* Much darker gray for sharpness */
    font-size: 1.0rem; /* Increased size */
    text-decoration: none;
    transition: all 0.2s ease;
    font-weight: 500; /* Slightly thicker font weight */
    padding: 2px 0 2px 5px; /* Add slight padding for active border */
    border-left: 3px solid transparent; /* Prepare for border transition */
    margin-left: -5px; /* Counteract padding to align */
  }

  .sidebar-toc a:hover {
    color: #337ab7; /* Theme color */
    transform: translateX(2px);
    text-decoration: none;
  }

  /* --- Active State (Scroll Spy) --- */
  .sidebar-toc a.active-toc-link {
    color: #337ab7 !important; /* Active Color (Blue) */
    font-weight: 700 !important;
    border-left-color: #337ab7 !important; /* Active Border */
  }

  /* Scrollbar styling */
  .sidebar-toc::-webkit-scrollbar {
    width: 6px;
  }
  .sidebar-toc::-webkit-scrollbar-thumb {
    background-color: #dee2e6;
    border-radius: 4px;
  }
  .sidebar-toc::-webkit-scrollbar-track {
    background: transparent;
  }
}

/* --- Reading Progress Bar --- */
#reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9999;
  width: 0%;
  height: 4px; /* Thickness of progress bar */
  background: #337ab7; /* Theme Color */
  box-shadow: 0 0 4px rgba(51, 122, 183, 0.5);
  transition: width 0.1s ease-out;
}