/* ============================================================
   BLOG-POST.CSS — Individual blog post page styles
   ETLGuru.in | Ankit Kumar
   ============================================================ */

/* ═══════════════════════════════════════════════════════════
   READING PROGRESS BAR
   ═══════════════════════════════════════════════════════════ */
.reading-progress {
  position: fixed;
  top: 0; left: 0;
  width: 0%; height: 3px;
  background: var(--grad-primary);
  z-index: 2000;
  transition: width 0.1s linear;
  border-radius: 0 2px 2px 0;
}

/* ═══════════════════════════════════════════════════════════
   ARTICLE HEADER
   ═══════════════════════════════════════════════════════════ */
.post-header {
  padding-top: calc(68px + var(--sp-10));
  padding-bottom: var(--sp-10);
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.post-header::before {
  content: ''; position: absolute; inset: 0;
  background: var(--grad-hero); pointer-events: none;
}
.post-header-inner { position: relative; z-index: 1; max-width: 820px; }

.post-breadcrumb {
  display: flex; align-items: center; gap: var(--sp-2);
  font-size: 0.75rem; font-family: var(--font-mono);
  color: var(--text-muted); margin-bottom: var(--sp-5);
}
.post-breadcrumb a { color: var(--text-3); }
.post-breadcrumb a:hover { color: var(--primary); }
.post-breadcrumb .sep { color: var(--text-muted); }

.post-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800; line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: var(--sp-5);
}

.post-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-4);
  margin-bottom: var(--sp-6);
}
.post-meta-item {
  display: flex; align-items: center; gap: var(--sp-2);
  font-size: 0.8rem; color: var(--text-muted);
}
.post-meta-item i { font-size: 0.75rem; }
.post-meta-item strong { color: var(--text-2); }

.post-tags { display: flex; flex-wrap: wrap; gap: var(--sp-2); }

/* ═══════════════════════════════════════════════════════════
   POST LAYOUT (TOC + Content)
   ═══════════════════════════════════════════════════════════ */
.post-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--sp-12);
  align-items: start;
  padding-block: var(--sp-12);
}

/* ═══════════════════════════════════════════════════════════
   TABLE OF CONTENTS (sticky sidebar)
   ═══════════════════════════════════════════════════════════ */
.post-toc {
  position: sticky;
  top: 90px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: var(--sp-6);
  order: 2; /* Right side */
}
.toc-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--sp-4);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: var(--sp-2);
}
.toc-list { list-style: none; }
.toc-item { margin-bottom: 2px; }
.toc-link {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-3);
  padding: 5px 10px;
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
  transition: all var(--t-fast);
  text-decoration: none;
  line-height: 1.45;
}
.toc-link:hover {
  color: var(--primary);
  background: rgba(10,102,194,0.05);
  border-left-color: var(--primary);
}
.toc-link.active {
  color: var(--primary);
  background: rgba(10,102,194,0.07);
  border-left-color: var(--primary);
  font-weight: 600;
}
[data-theme="dark"] .toc-link.active,
[data-theme="dark"] .toc-link:hover {
  color: var(--accent);
  background: rgba(0,196,232,0.07);
  border-left-color: var(--accent);
}
.toc-item--h3 .toc-link { padding-left: 22px; font-size: 0.75rem; }

/* TOC progress mini-bar */
.toc-progress {
  height: 2px;
  background: var(--border);
  border-radius: 1px;
  margin-bottom: var(--sp-4);
  overflow: hidden;
}
.toc-progress-fill {
  height: 100%;
  background: var(--grad-primary);
  border-radius: 1px;
  width: 0%;
  transition: width 0.15s linear;
}

/* ═══════════════════════════════════════════════════════════
   ARTICLE BODY TYPOGRAPHY
   ═══════════════════════════════════════════════════════════ */
.post-body { order: 1; min-width: 0; }

.post-body h2 {
  font-size: clamp(1.3rem, 2.5vw, 1.7rem);
  font-weight: 700;
  margin-top: var(--sp-12);
  margin-bottom: var(--sp-5);
  padding-top: var(--sp-4);
  color: var(--text);
  letter-spacing: -0.025em;
  scroll-margin-top: 90px;
}
.post-body h3 {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 700;
  margin-top: var(--sp-8);
  margin-bottom: var(--sp-4);
  color: var(--text);
  scroll-margin-top: 90px;
}
.post-body h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-top: var(--sp-6);
  margin-bottom: var(--sp-3);
  color: var(--text);
}
.post-body p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-2);
  margin-bottom: var(--sp-5);
}
.post-body strong { color: var(--text); font-weight: 700; }
.post-body em { font-style: italic; color: var(--text-2); }
.post-body a { color: var(--primary); font-weight: 500; }
[data-theme="dark"] .post-body a { color: var(--accent); }
.post-body a:hover { text-decoration: underline; }

.post-body ul, .post-body ol {
  margin-bottom: var(--sp-5);
  padding-left: var(--sp-6);
}
.post-body ul { list-style: none; }
.post-body ul li {
  position: relative;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-2);
  margin-bottom: var(--sp-2);
  padding-left: var(--sp-4);
}
.post-body ul li::before {
  content: '';
  position: absolute;
  left: 0; top: 11px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--grad-primary);
}
.post-body ol { list-style: decimal; }
.post-body ol li {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-2);
  margin-bottom: var(--sp-2);
  padding-left: var(--sp-2);
}
.post-body ol li::marker { color: var(--primary); font-weight: 700; }

/* Divider in posts */
.post-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin-block: var(--sp-10);
}

/* ═══════════════════════════════════════════════════════════
   CODE BLOCKS
   ═══════════════════════════════════════════════════════════ */
.code-block {
  background: #0D1117;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-lg);
  overflow: hidden;
  margin-block: var(--sp-6);
  font-family: var(--font-mono);
}
[data-theme="light"] .code-block {
  background: #1B2333;
  border-color: rgba(0,0,0,0.12);
}
.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-3) var(--sp-5);
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.code-lang {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  display: flex; align-items: center; gap: var(--sp-2);
}
.code-lang-dot {
  width: 8px; height: 8px; border-radius: 50%;
}
.lang-dax   .code-lang-dot { background: #F2C811; }
.lang-sql   .code-lang-dot { background: #0078D7; }
.lang-m     .code-lang-dot { background: #00C4E8; }
.lang-python .code-lang-dot { background: #3776AB; }
.lang-shell .code-lang-dot { background: #10B981; }

.code-copy-btn {
  font-size: 0.7rem; font-weight: 600;
  color: rgba(255,255,255,0.4);
  cursor: pointer; padding: 4px 10px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(255,255,255,0.1);
  background: transparent;
  transition: all var(--t-fast);
  font-family: var(--font-body);
}
.code-copy-btn:hover { color: #fff; background: rgba(255,255,255,0.08); }
.code-copy-btn.copied { color: #10B981; border-color: rgba(16,185,129,0.3); }

pre {
  margin: 0;
  padding: var(--sp-5) var(--sp-5);
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.7;
}
pre code {
  font-family: var(--font-mono);
  color: #E2E8F0;
  background: none;
  padding: 0;
}

/* Inline code */
.post-body code {
  font-family: var(--font-mono);
  font-size: 0.83em;
  background: rgba(10,102,194,0.1);
  color: var(--primary);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid rgba(10,102,194,0.15);
}
[data-theme="dark"] .post-body code {
  background: rgba(0,196,232,0.1);
  color: var(--accent);
  border-color: rgba(0,196,232,0.15);
}

/* Syntax token colours (manual) */
.tok-keyword  { color: #FF7B72; }   /* red   */
.tok-function { color: #D2A8FF; }   /* purple */
.tok-string   { color: #A5D6FF; }   /* blue  */
.tok-number   { color: #79C0FF; }   /* cyan  */
.tok-comment  { color: #8B949E; font-style: italic; }
.tok-operator { color: #FF7B72; }
.tok-var      { color: #FFA657; }   /* orange */
.tok-type     { color: #7EE787; }   /* green */
.tok-bracket  { color: #E6EDF3; }

/* ═══════════════════════════════════════════════════════════
   CALLOUT BOXES
   ═══════════════════════════════════════════════════════════ */
.callout {
  display: flex;
  gap: var(--sp-4);
  padding: var(--sp-4) var(--sp-5);
  border-radius: var(--r-lg);
  margin-block: var(--sp-6);
  border-left: 4px solid;
}
.callout-icon {
  font-size: 1.2rem; flex-shrink: 0; margin-top: 2px;
}
.callout-body p { margin-bottom: 0; font-size: 0.9rem; }
.callout-body strong {
  display: block; margin-bottom: var(--sp-1);
  font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em;
}

.callout--tip {
  background: rgba(16,185,129,0.06);
  border-color: var(--success);
}
.callout--tip .callout-body strong { color: var(--success); }

.callout--info {
  background: rgba(10,102,194,0.06);
  border-color: var(--primary);
}
[data-theme="dark"] .callout--info { background: rgba(0,196,232,0.06); border-color: var(--accent); }
.callout--info .callout-body strong { color: var(--primary); }
[data-theme="dark"] .callout--info .callout-body strong { color: var(--accent); }

.callout--warning {
  background: rgba(245,158,11,0.06);
  border-color: var(--warning);
}
.callout--warning .callout-body strong { color: var(--warning); }

.callout--danger {
  background: rgba(239,68,68,0.06);
  border-color: var(--danger);
}
.callout--danger .callout-body strong { color: var(--danger); }

/* ═══════════════════════════════════════════════════════════
   COMPARISON TABLE
   ═══════════════════════════════════════════════════════════ */
.post-body table {
  width: 100%; border-collapse: collapse;
  margin-block: var(--sp-6);
  font-size: 0.875rem;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--border);
}
.post-body th {
  background: rgba(10,102,194,0.08);
  font-weight: 700; font-size: 0.78rem;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text); padding: var(--sp-3) var(--sp-4);
  text-align: left; border-bottom: 1px solid var(--border);
}
[data-theme="dark"] .post-body th { background: rgba(0,196,232,0.08); }
.post-body td {
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--border);
  color: var(--text-2); vertical-align: top;
}
.post-body tr:last-child td { border-bottom: none; }
.post-body tr:hover td { background: rgba(10,102,194,0.03); }

/* ═══════════════════════════════════════════════════════════
   IMAGE / DIAGRAM PLACEHOLDER
   ═══════════════════════════════════════════════════════════ */
.post-img {
  width: 100%;
  border-radius: var(--r-xl);
  border: 1px solid var(--border);
  overflow: hidden;
  margin-block: var(--sp-6);
}
.post-img-placeholder {
  background: var(--surface-2);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: var(--sp-12) var(--sp-8);
  gap: var(--sp-3);
  color: var(--text-muted); font-size: 0.875rem;
}
.post-img-placeholder i { font-size: 2.5rem; color: var(--border-2); }
.post-img img { width: 100%; display: block; }
figcaption {
  text-align: center; font-size: 0.78rem;
  color: var(--text-muted); font-style: italic;
  padding: var(--sp-3);
  background: var(--surface-2);
  border-top: 1px solid var(--border);
}

/* ═══════════════════════════════════════════════════════════
   SHARE BUTTONS
   ═══════════════════════════════════════════════════════════ */
.share-bar {
  display: flex; align-items: center; gap: var(--sp-3);
  flex-wrap: wrap;
  margin-block: var(--sp-8);
  padding-block: var(--sp-6);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.share-label {
  font-size: 0.8rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-muted);
}
.share-btn {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  padding: 8px 16px; border-radius: var(--r-pill);
  font-size: 0.8rem; font-weight: 600;
  border: 1.5px solid var(--border-2);
  background: var(--surface); color: var(--text-3);
  transition: all var(--t-fast); cursor: pointer;
  text-decoration: none;
}
.share-btn:hover { transform: translateY(-2px); }
.share-btn--linkedin:hover { border-color: #0A66C2; color: #0A66C2; background: rgba(10,102,194,0.05); }
.share-btn--twitter:hover  { border-color: #1DA1F2; color: #1DA1F2; background: rgba(29,161,242,0.05); }
.share-btn--whatsapp:hover { border-color: #25D366; color: #25D366; background: rgba(37,211,102,0.05); }
.share-btn--copy:hover     { border-color: var(--primary); color: var(--primary); }

/* ═══════════════════════════════════════════════════════════
   AUTHOR CARD
   ═══════════════════════════════════════════════════════════ */
.author-card {
  display: flex; gap: var(--sp-6); align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-2xl);
  padding: var(--sp-8);
  margin-block: var(--sp-10);
}
.author-avatar-lg {
  width: 90px; height: 90px; border-radius: 50%;
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem; flex-shrink: 0;
  box-shadow: var(--shadow-primary);
}
.author-info h4 { margin-bottom: var(--sp-1); font-size: 1.1rem; }
.author-role-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.72rem; font-weight: 600;
  color: var(--accent); font-family: var(--font-mono);
  background: rgba(0,196,232,0.08);
  border: 1px solid rgba(0,196,232,0.2);
  padding: 3px 10px; border-radius: var(--r-pill);
  margin-bottom: var(--sp-3);
}
.author-bio {
  font-size: 0.875rem; color: var(--text-3); line-height: 1.7;
  margin-bottom: var(--sp-4);
}
.author-links { display: flex; gap: var(--sp-2); flex-wrap: wrap; }
.author-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.78rem; font-weight: 600;
  padding: 6px 14px; border-radius: var(--r-pill);
  border: 1.5px solid var(--border); color: var(--text-3);
  transition: all var(--t-fast); text-decoration: none;
}
.author-link:hover { border-color: var(--primary); color: var(--primary); }

/* ═══════════════════════════════════════════════════════════
   RELATED POSTS
   ═══════════════════════════════════════════════════════════ */
.related-posts { margin-block: var(--sp-10); }
.related-posts h3 { margin-bottom: var(--sp-6); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-5); }

.related-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  transition: all var(--t-normal);
  text-decoration: none;
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(10,102,194,0.2); }
.related-card-img {
  height: 130px;
  display: flex; align-items: center; justify-content: center; font-size: 2.5rem;
}
.related-card-body { padding: var(--sp-4); }
.related-card-body .badge { margin-bottom: var(--sp-2); }
.related-card h5 { font-size: 0.875rem; line-height: 1.4; color: var(--text); margin-bottom: var(--sp-2); }
.related-card p  { font-size: 0.78rem; color: var(--text-muted); }

/* ═══════════════════════════════════════════════════════════
   SECTION ANCHOR OFFSET (sticky navbar compensation)
   ═══════════════════════════════════════════════════════════ */
.post-body h2[id],
.post-body h3[id] {
  scroll-margin-top: 90px;
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .post-layout {
    grid-template-columns: 1fr;
  }
  .post-toc {
    position: static;
    order: -1; /* Above content on mobile */
    max-height: 260px;
    overflow-y: auto;
  }
  .related-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .post-title { font-size: 1.8rem; }
  .author-card { flex-direction: column; }
  .author-avatar-lg { width: 70px; height: 70px; font-size: 2rem; }
  .related-grid { grid-template-columns: 1fr; }
  .share-bar { gap: var(--sp-2); }
  .post-layout { padding-block: var(--sp-8); }
}

@media (max-width: 480px) {
  pre { font-size: 0.78rem; }
  .post-meta { gap: var(--sp-3); }
}