/**
 * Article Page Enhancement v2
 * - Reading Progress Bar
 * - Enhanced TOC with sticky behavior
 * - Improved article content typography
 */

/* ==================== Reading Progress Bar ==================== */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 100%);
  z-index: 1001;
  transition: width 0.1s ease;
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
}

/* ==================== Article Layout Enhancement ==================== */
.post-single {
  max-width: 100%;
  margin: 0 auto;
}

.post-header {
  max-width: 1200px;
  margin: 0 auto calc(var(--gap) * 2);
  padding: 0 var(--gap);
}

.post-title {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  margin: calc(var(--gap) * 2) 0 var(--gap);
  color: var(--primary);
}

.post-description {
  font-size: var(--text-lg);
  color: var(--secondary);
  line-height: var(--leading-relaxed);
  margin: var(--gap) 0;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: var(--text-sm);
  color: #999;
  margin: var(--gap) 0;
}

/* ==================== Post Content Wrapper ==================== */
.post-content-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--gap) * 2);
  max-width: var(--nav-width);
  margin: 0 auto;
  padding: 0 var(--gap);
}

.post-content-wrapper.has-toc {
  grid-template-columns: 250px 1fr;
  gap: calc(var(--gap) * 3);
}

/* ==================== TOC Sidebar Enhancement ==================== */
.toc-sidebar {
  position: sticky;
  top: calc(var(--header-height, 60px) + var(--gap));
  align-self: flex-start;
  max-height: calc(100vh - var(--header-height, 60px) - var(--gap) * 2);
  overflow-y: auto;
  /* padding: calc(var(--gap) * 1.5); */
  /* background: var(--entry); */
  /* border: 1px solid var(--border); */
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* Glassmorphism effect for TOC */
[data-theme="dark"] .toc-sidebar {
  background: rgba(31, 20, 61, 0.7);
  backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.toc-sidebar::-webkit-scrollbar {
  width: 4px;
}

.toc-sidebar::-webkit-scrollbar-thumb {
  background: var(--tertiary);
  border-radius: 2px;
}

.toc-sidebar #TableOfContents {
  font-size: var(--text-sm);
}

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

.toc-sidebar #TableOfContents > ul > li {
  margin-bottom: 8px;
}

.toc-sidebar #TableOfContents ul ul {
  padding-left: 16px;
  margin-top: 6px;
}

.toc-sidebar #TableOfContents li {
  margin-bottom: 6px;
}

.toc-sidebar #TableOfContents a {
  color: var(--secondary);
  text-decoration: none;
  display: block;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  line-height: 1.5;
}

.toc-sidebar #TableOfContents a:hover {
  color: var(--accent);
  background: var(--code-bg);
  transform: translateX(4px);
}

.toc-sidebar #TableOfContents a.active {
  color: var(--accent);
  background: rgba(59, 130, 246, 0.1);
  font-weight: var(--font-medium);
  border-left: 3px solid var(--accent);
  padding-left: 12px;
}

/* ==================== Post Content Main ==================== */
.post-content-main {
  min-width: 0; /* Prevent grid overflow */
}

.post-content {
  max-width: 800px;
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--content);
}

/* Enhanced Typography */
.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--primary);
  margin: calc(var(--gap) * 1.5) 0 var(--gap);
  scroll-margin-top: calc(var(--header-height, 60px) + var(--gap));
}

.post-content h2 {
  font-size: var(--text-2xl);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}

.post-content h3 {
  font-size: var(--text-xl);
}

.post-content h4 {
  font-size: var(--text-lg);
}

.post-content p {
  margin: var(--gap) 0;
}

.post-content a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(59, 130, 246, 0.3);
  text-underline-offset: 3px;
  transition: all 0.2s ease;
}

.post-content a:hover {
  color: var(--accent-2);
  text-decoration-color: var(--accent-2);
}

/* Enhanced Lists */
.post-content ul,
.post-content ol {
  margin: var(--gap) 0;
  padding-left: 28px;
}

.post-content li {
  margin: 8px 0;
  line-height: var(--leading-relaxed);
}

.post-content ul li::marker {
  color: var(--accent);
}

.post-content ol li::marker {
  color: var(--accent);
  font-weight: var(--font-semibold);
}

/* Enhanced Blockquotes */
.post-content blockquote {
  margin: calc(var(--gap) * 1.5) 0;
  padding: var(--gap) calc(var(--gap) * 1.5);
  border-left: 4px solid var(--accent);
  background: var(--code-bg);
  border-radius: var(--radius-sm);
  font-style: italic;
  color: var(--secondary);
}

.post-content blockquote p {
  margin: 8px 0;
}

/* Enhanced Code Blocks */
.post-content pre {
  margin: calc(var(--gap) * 1.5) 0;
  padding: calc(var(--gap) * 1.5);
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: var(--text-sm);
  line-height: 1.6;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.post-content :not(pre) > code {
  padding: 2px 6px;
  background: var(--code-bg);
  color: var(--accent);
  border-radius: var(--radius-sm);
  font-weight: var(--font-medium);
}

/* Enhanced Images */
.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: calc(var(--gap) * 1.5) 0;
  box-shadow: var(--shadow-md);
}

/* Enhanced Tables */
.post-content table {
  width: 100%;
  margin: calc(var(--gap) * 1.5) 0;
  border-collapse: collapse;
  font-size: var(--text-sm);
  overflow-x: auto;
  display: block;
}

.post-content th,
.post-content td {
  padding: 12px 16px;
  border: 1px solid var(--border);
  text-align: left;
}

.post-content th {
  background: var(--code-bg);
  font-weight: var(--font-semibold);
  color: var(--primary);
}

.post-content tr:nth-child(even) {
  background: rgba(59, 130, 246, 0.03);
}

/* ==================== Post Footer ==================== */
.post-footer {
  margin-top: calc(var(--gap) * 3);
  padding-top: calc(var(--gap) * 2);
  border-top: 2px solid var(--border);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0 0 calc(var(--gap) * 2) 0;
}

.post-tags li a {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background: var(--code-bg);
  color: var(--accent);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  text-decoration: none;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.post-tags li a:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ==================== Responsive Design ==================== */
@media (max-width: 1024px) {
  .post-content-wrapper.has-toc {
    grid-template-columns: 1fr;
  }

  .toc-sidebar {
    display: none; /* Hide on tablets and mobile */
  }

  .post-title {
    font-size: var(--text-3xl);
  }
}

@media (max-width: 768px) {
  .post-header {
    padding: 0 16px;
  }

  .post-content-wrapper {
    padding: 0 16px;
  }

  .post-title {
    font-size: var(--text-2xl);
    margin: var(--gap) 0;
  }

  .post-description {
    font-size: var(--text-base);
  }

  .post-content {
    font-size: var(--text-base);
  }

  .post-content h2 {
    font-size: var(--text-xl);
  }

  .post-content h3 {
    font-size: var(--text-lg);
  }

  .post-content pre {
    padding: var(--gap);
    font-size: 13px;
  }

  .post-content table {
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .post-meta {
    font-size: var(--text-xs);
    gap: 12px;
  }

  .post-tags li a {
    padding: 5px 12px;
    font-size: var(--text-xs);
  }
}

/* ==================== Print Styles ==================== */
@media print {
  .reading-progress,
  .toc-sidebar,
  .post-footer {
    display: none;
  }

  .post-content-wrapper.has-toc {
    grid-template-columns: 1fr;
  }

  .post-content {
    max-width: 100%;
  }
}