/* ==========================================================================
   Collabsource Tools - Blog & Editorial Stylesheet
   ========================================================================== */

/* Reading Progress Bar */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: var(--accent-gradient);
  z-index: 1001;
  transition: width 0.1s ease-out;
}

/* Blog Hero Header */
.blog-header {
  padding: 40px 0 32px;
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
}

.blog-meta-row {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.blog-featured-media {
  max-width: 880px;
  margin: 0 auto 40px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.blog-featured-svg {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  display: block;
}

/* In-Article Figures & Diagrams */
.blog-figure {
  margin: 36px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  box-shadow: var(--shadow-md);
}

.blog-figure-svg {
  width: 100%;
  height: auto;
  display: block;
  background: #0f172a;
}

.blog-figure-caption {
  padding: 12px 18px;
  font-size: 0.875rem;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-weight: 500;
}

/* 2-Column Article Layout */
.blog-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto;
}

@media (min-width: 1024px) {
  .blog-layout {
    grid-template-columns: 1fr 300px;
  }
}

.blog-article {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.blog-article h2 {
  font-size: 1.875rem;
  color: var(--text-primary);
  margin: 48px 0 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.blog-article h3 {
  font-size: 1.375rem;
  color: var(--text-primary);
  margin: 36px 0 16px;
}

.blog-article p {
  margin-bottom: 24px;
}

.blog-article ul, .blog-article ol {
  margin: 20px 0 28px 24px;
}

.blog-article li {
  margin-bottom: 10px;
}

.blog-article blockquote {
  border-left: 4px solid var(--primary);
  background: var(--bg-tertiary);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  margin: 32px 0;
  color: var(--text-primary);
}

.blog-article code {
  background: var(--bg-tertiary);
  color: var(--primary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.blog-article pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
  margin: 28px 0;
}

.blog-article pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
}

/* Sidebar & Sticky Table of Contents */
.blog-sidebar {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.sticky-toc {
  position: sticky;
  top: 96px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.toc-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: block;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.toc-link:hover, .toc-link.active {
  color: var(--primary);
  background: var(--primary-light);
  transform: translateX(4px);
}

/* Tool CTA Box in Post */
.blog-tool-cta {
  background: var(--accent-gradient);
  color: #ffffff;
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  text-align: center;
  margin: 48px 0;
  box-shadow: var(--shadow-lg);
}

.blog-tool-cta h3 {
  color: #ffffff;
  font-size: 1.625rem;
  margin-bottom: 12px;
}

.blog-tool-cta p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 580px;
  margin: 0 auto 24px;
}

.blog-tool-cta .btn {
  background: #ffffff;
  color: var(--primary);
  font-weight: 700;
}

.blog-tool-cta .btn:hover {
  background: #f1f5f9;
  transform: translateY(-2px);
}

/* Author Box */
.author-box {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin: 48px 0;
}

.author-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--primary);
  font-size: 1.5rem;
  flex-shrink: 0;
}

/* Blog Listing Grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 32px;
  margin: 40px 0;
}

.blog-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  text-decoration: none;
}

.blog-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.blog-card-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border-color);
}

.blog-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.blog-card-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 8px;
}

.blog-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.35;
}

.blog-card-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  flex-grow: 1;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color-subtle);
  padding-top: 12px;
}