/* =====================
   BLOG DESIGN SYSTEM — DARK THEME
   Matches site's universal dark theme (black bg, cyan accents)
   ===================== */
:root {
  --blog-accent: #22d3ee;
  --blog-accent-dim: rgba(34,211,238,0.15);
  --blog-accent-border: rgba(34,211,238,0.25);
  --blog-text: rgba(255,255,255,0.75);
  --blog-text-bright: rgba(255,255,255,0.9);
  --blog-text-muted: rgba(255,255,255,0.4);
  --blog-border: rgba(255,255,255,0.08);
  --blog-card-bg: rgba(255,255,255,0.03);
  --blog-heading: 'Inter', system-ui, sans-serif;
  --blog-body: 'Inter', system-ui, sans-serif;
  --blog-max-width: 780px;
  --blog-max-width-wide: 1100px;
}

/* =====================
   BREADCRUMBS
   ===================== */
.blog-breadcrumbs {
  max-width: var(--blog-max-width-wide);
  margin: 0 auto;
  padding: 20px 32px 0;
  font-size: 0.85rem;
  font-family: var(--blog-body);
}
.blog-breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin: 0;
  padding: 0;
}
.blog-breadcrumbs li { display: flex; align-items: center; gap: 6px; }
.blog-breadcrumbs li + li::before { content: '/'; color: var(--blog-text-muted); }
.blog-breadcrumbs a { color: var(--blog-accent); text-decoration: none; }
.blog-breadcrumbs a:hover { text-decoration: underline; }
.blog-breadcrumbs span { color: var(--blog-text-muted); }

/* =====================
   BLOG CONTENT WRAPPER
   Transparent — sits on the dark body
   ===================== */
.blog-content-wrapper {
  background: transparent;
  color: var(--blog-text);
  font-family: var(--blog-body);
  line-height: 1.7;
}

/* =====================
   HERO BANNER
   ===================== */
.blog-hero {
  position: relative;
  background: transparent;
  padding: 100px 32px 40px;
  text-align: center;
}
.blog-hero-content { max-width: var(--blog-max-width); margin: 0 auto; }

.blog-hero-tags {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.blog-hero-tags span {
  background: var(--blog-accent-dim);
  color: var(--blog-accent);
  border: 1px solid var(--blog-accent-border);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.3px;
}

.blog-hero h1 {
  font-family: var(--blog-heading);
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 18px;
}
.blog-hero-meta {
  color: var(--blog-text-muted);
  font-size: 0.88rem;
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.blog-hero-meta span::before { content: '\00b7\00a0'; }
.blog-hero-meta span:first-child::before { content: ''; }

/* Hero image as block */
.blog-hero-image {
  max-width: var(--blog-max-width-wide);
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--blog-border);
}
.blog-hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* =====================
   LAYOUT
   ===================== */
.blog-layout {
  max-width: var(--blog-max-width-wide);
  margin: 0 auto;
  padding: 40px 32px 60px;
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 60px;
  align-items: start;
}

/* =====================
   ARTICLE BODY
   ===================== */
.article-body h2 {
  font-family: var(--blog-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  margin: 2.5rem 0 1rem;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--blog-border);
}
.article-body h3 {
  font-family: var(--blog-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--blog-text-bright);
  margin: 2rem 0 0.75rem;
}
.article-body p {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1.2rem;
  color: var(--blog-text);
}
.article-body ul, .article-body ol {
  margin: 0.75rem 0 1.25rem 1.4rem;
}
.article-body li {
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 0.4rem;
  color: var(--blog-text);
}
.article-body strong { color: var(--blog-text-bright); font-weight: 600; }
.article-body em { font-style: italic; }
.article-body a { color: var(--blog-accent); text-decoration: underline; }
.article-body a:hover { color: #67e8f9; }

/* Blockquote */
.article-body blockquote {
  border-left: 4px solid var(--blog-accent);
  background: var(--blog-accent-dim);
  padding: 16px 20px;
  margin: 1.5rem 0;
  border-radius: 0 8px 8px 0;
}
.article-body blockquote p {
  margin: 0;
  font-size: 1rem;
  color: var(--blog-accent);
  font-weight: 500;
}
.article-body blockquote.callout-warning {
  border-left-color: #f59e0b;
  background: rgba(245,158,11,0.1);
}
.article-body blockquote.callout-warning p { color: #fbbf24; }

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: 1.5rem 0 2rem;
  border-radius: 10px;
  border: 1px solid var(--blog-border);
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
.article-body thead th {
  background: rgba(34,211,238,0.1);
  color: var(--blog-accent);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--blog-border);
}
.article-body tbody td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--blog-border);
  vertical-align: top;
  color: var(--blog-text);
}
.article-body tbody tr:nth-child(even) td { background: rgba(255,255,255,0.02); }
.article-body tbody tr:last-child td { border-bottom: none; }

/* Code blocks */
.article-body pre {
  background: rgba(255,255,255,0.04);
  color: #cdd6f4;
  padding: 20px 24px;
  border-radius: 10px;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  line-height: 1.6;
  border: 1px solid var(--blog-border);
}
.article-body code { font-family: 'Fira Code', 'Courier New', monospace; }
.article-body p code, .article-body li code {
  background: rgba(34,211,238,0.1);
  color: var(--blog-accent);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}

/* Blog images */
.article-body .blog-image {
  width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 2rem 0;
  border: 1px solid var(--blog-border);
}

/* =====================
   KEY TAKEAWAY BOX
   ===================== */
.takeaway-box {
  background: var(--blog-accent-dim);
  border: 1px solid var(--blog-accent-border);
  border-radius: 12px;
  padding: 28px 32px;
  margin: 2.5rem 0;
}
.takeaway-box h3 {
  font-family: var(--blog-heading);
  font-size: 1.1rem;
  color: var(--blog-accent);
  margin-bottom: 10px;
}
.takeaway-box p { color: var(--blog-text); margin: 0; font-size: 1rem; line-height: 1.7; }

/* =====================
   CTA SECTION (in-article)
   ===================== */
.cta-section, .cta-box {
  background: rgba(255,255,255,0.03);
  border-radius: 16px;
  padding: 40px 36px;
  margin: 3rem 0 1rem;
  text-align: center;
  border: 1px solid var(--blog-border);
}
.cta-section h3, .cta-box h3 {
  font-family: var(--blog-heading);
  font-size: 1.3rem;
  color: #fff;
  margin-bottom: 10px;
}
.cta-section p, .cta-box p {
  color: var(--blog-text-muted);
  margin-bottom: 20px;
  font-size: 0.98rem;
}
.cta-btn, .cta-button {
  display: inline-block;
  background: linear-gradient(135deg, #22d3ee, #3b82f6);
  color: #fff !important;
  padding: 13px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none !important;
  transition: opacity 0.2s, transform 0.1s;
}
.cta-btn:hover, .cta-button:hover { opacity: 0.85; transform: translateY(-1px); }

/* =====================
   SIDEBAR
   ===================== */
.sidebar { position: sticky; top: 80px; }

.sidebar-card, .sidebar .toc-card, .sidebar .tags-card, .sidebar .cta-card {
  background: var(--blog-card-bg);
  border: 1px solid var(--blog-border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
}
.sidebar-card h4, .sidebar-card h3,
.sidebar .toc-card h3, .sidebar .tags-card h3, .sidebar .cta-card h3 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--blog-text-muted);
  margin-bottom: 14px;
  font-family: var(--blog-body);
}

/* Table of Contents */
.toc-list { list-style: none; padding: 0; margin: 0; }
.toc-list li {
  padding: 6px 0;
  border-bottom: 1px solid var(--blog-border);
}
.toc-list li:last-child { border-bottom: none; }
.toc-list a {
  color: var(--blog-text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  line-height: 1.4;
  display: block;
  transition: color 0.2s, padding-left 0.2s;
}
.toc-list a:hover { color: var(--blog-accent); padding-left: 4px; }

/* Tags in sidebar */
.sidebar-tags,
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.sidebar-tag,
.sidebar-tags span,
.tag-list span {
  background: var(--blog-accent-dim);
  color: var(--blog-accent);
  border: 1px solid var(--blog-accent-border);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  display: inline-block;
}

/* Sidebar CTA card */
.sidebar .cta-card {
  background: rgba(34,211,238,0.05);
  border-color: var(--blog-accent-border);
}
.sidebar .cta-card h3 { color: var(--blog-accent); }
.sidebar .cta-card p { color: var(--blog-text); font-size: 0.9rem; margin-bottom: 16px; }
.sidebar .cta-card .cta-button,
.sidebar .cta-card .cta-btn {
  width: 100%;
  text-align: center;
  display: block;
}

/* =====================
   RELATED POSTS
   ===================== */
.related-posts {
  max-width: var(--blog-max-width-wide);
  margin: 0 auto;
  padding: 0 32px 60px;
}
.related-posts h2 {
  font-family: var(--blog-heading);
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 24px;
  text-align: center;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  border: 1px solid var(--blog-border);
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
  display: block;
  background: var(--blog-card-bg);
}
.related-card:hover {
  transform: translateY(-4px);
  border-color: var(--blog-accent-border);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.related-card img { width: 100%; height: 180px; object-fit: cover; display: block; }
.related-card h3 {
  font-family: var(--blog-heading);
  font-size: 0.95rem;
  color: var(--blog-text-bright);
  padding: 16px;
  line-height: 1.4;
  margin: 0;
}

/* =====================
   READING PROGRESS BAR
   ===================== */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, #22d3ee, #3b82f6);
  z-index: 999;
  transition: width 0.1s;
}

/* =====================
   RESPONSIVE
   ===================== */
@media (max-width: 900px) {
  .blog-layout { grid-template-columns: 1fr; padding: 30px 20px; gap: 30px; }
  .sidebar { position: static; }
  .related-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .blog-hero { padding: 80px 16px 30px; }
  .blog-hero h1 { font-size: 1.6rem; }
  .blog-layout { padding: 20px 16px; }
  .cta-section, .cta-box { padding: 28px 20px; }
  .blog-breadcrumbs { padding: 12px 16px 0; }
  .related-grid { grid-template-columns: 1fr; }
}