/* ============================================ */
/* PixabAnimation Blog — Editorial Tech Magazine */
/* Warm off-white + Indigo accent + Playfair     */
/* ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400;1,500&display=swap');

/* === Design Tokens === */
:root {
  --bg: #FAF8F5;
  --bg-surface: #FFFFFF;
  --bg-elevated: #FFFFFF;
  --text-primary: #1A1A2E;
  --text-secondary: #4A4A68;
  --text-tertiary: #7A7A96;
  --accent: #4338CA;
  --accent-hover: #3730A3;
  --accent-light: rgba(67, 56, 202, 0.08);
  --accent-medium: rgba(67, 56, 202, 0.15);
  --border: #E8E5E0;
  --border-light: #F0EDE8;
  --shadow-sm: 0 1px 3px rgba(26, 26, 46, 0.04);
  --shadow-md: 0 4px 16px rgba(26, 26, 46, 0.06);
  --shadow-lg: 0 8px 32px rgba(26, 26, 46, 0.08);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: 0.2s ease;
}

/* === Reset & Base === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box }
html { scroll-behavior: smooth; scroll-padding-top: 80px }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
}

/* === Reading Progress Bar === */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #6366F1, #818CF8);
  z-index: 10001;
  transition: width 0.1s linear;
  border-radius: 0 2px 2px 0;
}

/* === Blog Navbar === */
.blog-navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(250, 248, 245, 0.92);
  border-bottom: 1px solid var(--border-light);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: box-shadow var(--transition);
}
.blog-navbar.scrolled {
  box-shadow: var(--shadow-sm);
}
.blog-nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 56px;
  position: relative;
}
.blog-nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}
.blog-nav-brand img {
  width: 28px;
  height: 24px;
  flex-shrink: 0;
}
.blog-nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
}
.blog-nav-links a {
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-tertiary);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.blog-nav-links a:hover,
.blog-nav-links a.active {
  color: var(--accent);
  background: var(--accent-light);
}
.blog-nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.blog-nav-actions a {
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-tertiary);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.blog-nav-actions a:hover { color: var(--accent) }
.blog-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
}
.blog-nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text-secondary);
  margin: 4px 0;
  border-radius: 2px;
  transition: all 0.3s;
}
.blog-nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(3px, 4px);
}
.blog-nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.blog-nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(3px, -4px);
}
@media(max-width: 768px) {
  .blog-nav-toggle { display: block }
  .blog-nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(250, 248, 245, 0.98);
    flex-direction: column;
    padding: 12px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
  }
  .blog-nav-links.open { display: flex }
  .blog-nav-links a { padding: 10px 14px; width: 100% }
  .blog-nav-actions .btn { display: none }
}

/* === Breadcrumbs === */
.breadcrumb-bar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 0.8rem;
  color: var(--text-tertiary);
}
.breadcrumb-bar a {
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color var(--transition);
}
.breadcrumb-bar a:hover { color: var(--accent) }
.breadcrumb-bar .sep {
  margin: 0 8px;
  opacity: 0.4;
}
.breadcrumb-bar .current {
  color: var(--text-secondary);
  font-weight: 500;
}

/* === Blog Layout === */
.blog-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 60px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 56px;
  align-items: start;
}

/* === Article Hero === */
.article-hero {
  margin-bottom: 36px;
}
.article-category-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 5px 14px;
  background: var(--accent-light);
  border: 1px solid rgba(67, 56, 202, 0.12);
  border-radius: var(--radius-full);
  margin-bottom: 20px;
  text-decoration: none;
  transition: all var(--transition);
}
.article-category-badge:hover {
  background: var(--accent-medium);
  border-color: rgba(67, 56, 202, 0.2);
}
.blog-wrapper h1 {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.article-meta-row {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}
.article-meta-row .meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.article-meta-row .meta-item i {
  font-size: 0.8rem;
  opacity: 0.6;
}
.article-meta-row .meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-tertiary);
  opacity: 0.4;
}
.reading-time-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  background: var(--accent-light);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
}

/* === Cover Image === */
.blog-cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 40px;
  background: var(--border-light);
  width: 100%;
  box-shadow: var(--shadow-md);
  position: relative;
}
.blog-cover img {
  width: 100%;
  display: block;
  aspect-ratio: 16/9;
  object-fit: cover;
}

/* === Article Content === */
.blog-content {
  font-size: 1.08rem;
  line-height: 1.85;
  color: var(--text-secondary);
}
.blog-content > p:first-of-type::first-letter {
  font-family: var(--font-display);
  font-size: 3.2em;
  font-weight: 700;
  float: left;
  line-height: 0.85;
  margin: 4px 12px 0 0;
  color: var(--accent);
}
.blog-content h2 {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 2em 0 0.6em;
  line-height: 1.25;
  letter-spacing: -0.01em;
  padding-left: 16px;
  border-left: 3px solid var(--accent);
}
.blog-content h3 {
  font-family: var(--font-body);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 1.6em 0 0.4em;
}
.blog-content p {
  margin-bottom: 1.3em;
  color: var(--text-secondary);
}
.blog-content ul,
.blog-content ol {
  padding-left: 24px;
  margin-bottom: 1.3em;
}
.blog-content li {
  margin-bottom: 0.5em;
  color: var(--text-secondary);
}
.blog-content li strong {
  color: var(--text-primary);
}
.blog-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 20px 24px;
  margin: 2em 0;
  background: var(--accent-light);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--text-secondary);
  font-size: 1.05rem;
}
.blog-content blockquote p {
  margin-bottom: 0;
}
.blog-content code {
  background: rgba(67, 56, 202, 0.06);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.85em;
  font-family: 'SF Mono', 'Fira Code', monospace;
  color: var(--accent);
}
.blog-content img {
  max-width: 100%;
  border-radius: var(--radius-md);
  margin: 1.8em auto;
  display: block;
  box-shadow: var(--shadow-sm);
}
.blog-content a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(67, 56, 202, 0.3);
  text-underline-offset: 2px;
  transition: text-decoration-color var(--transition);
}
.blog-content a:hover {
  text-decoration-color: var(--accent);
}
.blog-content pre {
  background: var(--text-primary);
  color: #E8E5E0;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: 0.85rem;
  margin: 1.5em 0;
  font-family: 'SF Mono', 'Fira Code', monospace;
  line-height: 1.6;
}

/* === Spec Tables (enhanced) === */
.spec-table-wrap {
  overflow-x: auto;
  margin: 32px 0;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  background: var(--bg-surface);
}
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-body);
  font-size: 0.9rem;
}
.spec-table thead th {
  background: linear-gradient(135deg, #1A1A2E, #2D2D4E);
  color: #fff;
  padding: 14px 20px;
  text-align: left;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.spec-table tbody tr td {
  padding: 10px 20px;
  border-bottom: 1px solid var(--border-light);
  vertical-align: top;
  line-height: 1.6;
}
.spec-table tbody tr:last-child td {
  border-bottom: none;
  padding-bottom: 16px;
}
.spec-table tbody tr:first-child td {
  padding-top: 16px;
}
.spec-table tbody tr td:first-child {
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  width: 30%;
  min-width: 140px;
}
.spec-table tbody tr td:last-child {
  color: var(--text-secondary);
}
.spec-table tbody tr:nth-child(even) {
  background: var(--accent-light);
}
.spec-table tbody tr:hover {
  background: rgba(67, 56, 202, 0.06);
}
.spec-section-row td {
  background: linear-gradient(135deg, var(--accent), #6366F1) !important;
  color: #fff !important;
  font-weight: 700 !important;
  font-size: 0.78rem !important;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 10px 20px !important;
  border-bottom: 2px solid rgba(255, 255, 255, 0.1) !important;
}
.spec-section-row td:first-child,
.spec-section-row td:last-child {
  color: #fff !important;
}
.spec-table tbody tr.spec-section-row:hover {
  background: linear-gradient(135deg, var(--accent), #6366F1) !important;
}
@media(max-width: 600px) {
  .spec-table tbody tr td:first-child { white-space: normal; width: 40% }
}

/* === Pros & Cons Card === */
.pros-cons-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 36px 0;
  padding: 28px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.pros-cons-card .pros,
.pros-cons-card .cons {
  padding: 0;
}
.pros-cons-card .pros h4,
.pros-cons-card .cons h4 {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.pros-cons-card .pros h4 {
  color: #059669;
}
.pros-cons-card .cons h4 {
  color: #DC2626;
}
.pros-cons-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.pros-cons-card li {
  padding: 6px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.pros-cons-card li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 7px;
}
.pros-cons-card .pros li::before {
  background: #059669;
}
.pros-cons-card .cons li::before {
  background: #DC2626;
}
@media(max-width: 600px) {
  .pros-cons-card { grid-template-columns: 1fr; gap: 24px }
}

/* === Verdict Box === */
.verdict-box {
  margin: 36px 0;
  padding: 28px 32px;
  background: linear-gradient(135deg, rgba(67, 56, 202, 0.04), rgba(99, 102, 241, 0.04));
  border: 1px solid rgba(67, 56, 202, 0.12);
  border-radius: var(--radius-lg);
  position: relative;
}
.verdict-box::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--accent), #6366F1);
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}
.verdict-box h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  padding-left: 0;
  border: none;
}
.verdict-box p {
  color: var(--text-secondary);
  margin-bottom: 0;
  font-size: 1rem;
  line-height: 1.75;
}

/* === Tags === */
.tags-section {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.tags-section .label {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
  color: var(--text-tertiary);
}
.tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-light);
  border: 1px solid rgba(67, 56, 202, 0.1);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  transition: all var(--transition);
  margin-right: 6px;
  margin-bottom: 6px;
}
.tag:hover {
  background: var(--accent-medium);
  border-color: rgba(67, 56, 202, 0.2);
}

/* === Share === */
.share-section {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 28px;
}
.share-section .label {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
}
.share-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--accent-light);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  text-decoration: none;
  transition: all var(--transition);
  font-size: 0.85rem;
  border: none;
  cursor: pointer;
  font-weight: 600;
}
.share-btn:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-1px);
}

/* === Author Bio === */
.author-bio {
  margin-top: 40px;
  padding: 28px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}
.author-bio::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #6366F1, #818CF8);
}
.author-avatar {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #6366F1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(67, 56, 202, 0.25);
}
.author-info { flex: 1; min-width: 200px }
.author-info .name {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 4px;
  color: var(--text-primary);
}
.author-info .desc {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  line-height: 1.6;
}
.author-social {
  display: flex;
  gap: 8px;
}
.author-social a {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent-light);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.82rem;
  transition: all var(--transition);
}
.author-social a:hover {
  background: var(--accent);
  color: #fff;
}

/* === Useful Links === */
.useful-links {
  margin-top: 36px;
  padding: 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.useful-links .label {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
  color: var(--text-tertiary);
}
.useful-links .grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.useful-links a {
  font-size: 0.88rem;
  color: var(--accent);
  text-decoration: none;
  padding: 8px 12px;
  display: block;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.useful-links a:hover {
  background: var(--accent-light);
}

/* === Related Articles === */
.related-articles {
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
  grid-column: 1 / -1;
}
.related-articles-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.related-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all 0.25s ease;
}
.related-card:hover {
  border-color: rgba(67, 56, 202, 0.15);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.related-card-img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  background: var(--border-light);
}
.related-card-body {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.related-card-cat {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}
.related-card-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 6px;
  color: var(--text-primary);
}
.related-card-meta {
  font-size: 0.72rem;
  color: var(--text-tertiary);
  margin-top: auto;
}
@media(max-width: 768px) {
  .related-grid { grid-template-columns: 1fr }
}

/* === Ad Banner === */
.blog-ad-container {
  margin: 40px 0;
  text-align: center;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: all 0.3s ease;
}
.blog-ad-container:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(67, 56, 202, 0.12);
}
.blog-ad-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 200px;
  background: linear-gradient(135deg, var(--bg), var(--border-light));
  position: relative;
  padding: 32px 24px;
}
.blog-ad-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(67, 56, 202, 0.03) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 50%, rgba(99, 102, 241, 0.02) 0%, transparent 60%);
  pointer-events: none;
}
.blog-ad-label {
  position: absolute;
  top: 10px;
  right: 14px;
  font-size: 0.6rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  font-weight: 600;
  background: var(--accent-light);
  padding: 2px 10px;
  border-radius: var(--radius-full);
}
.blog-ad-content {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 8px;
  position: relative;
  z-index: 1;
  max-width: 700px;
  width: 100%;
}
.blog-ad-icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--accent), #6366F1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(67, 56, 202, 0.25);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.blog-ad-container:hover .blog-ad-icon {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(67, 56, 202, 0.35);
}
.blog-ad-text { text-align: left; flex: 1 }
.blog-ad-text h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.blog-ad-text p {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  line-height: 1.5;
  margin-bottom: 10px;
}
.blog-ad-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 22px;
  background: linear-gradient(135deg, var(--accent), #6366F1);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s ease;
  letter-spacing: -0.01em;
}
.blog-content .blog-ad-cta { color: #fff; text-decoration: none }
.blog-content .blog-ad-cta:hover {
  color: #fff;
  background: linear-gradient(135deg, #6366F1, #818CF8);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(67, 56, 202, 0.3);
}
.blog-ad-cta:active { transform: translateY(0) }
.blog-ad-cta i { font-size: 0.7rem; transition: transform 0.2s ease }
.blog-ad-cta:hover i { transform: translateX(2px) }

/* === Ad Slot Positions === */
.blog-ad-slot {
  margin: 0;
}

.blog-ad-slot-top {
  margin: 32px 0;
}

.blog-ad-slot-top .blog-ad-container {
  margin: 0;
  border: 1px solid rgba(67, 56, 202, 0.1);
  background: linear-gradient(135deg, rgba(67, 56, 202, 0.02), rgba(99, 102, 241, 0.04));
}

.blog-ad-slot-mid {
  margin: 36px 0;
}

.blog-ad-slot-mid .blog-ad-container {
  margin: 0;
  border: 1px solid rgba(67, 56, 202, 0.08);
  background: linear-gradient(135deg, rgba(67, 56, 202, 0.01), rgba(99, 102, 241, 0.03));
}

.blog-ad-slot-bottom {
  margin: 40px 0 0;
}

.blog-ad-slot-bottom .blog-ad-container {
  margin: 0;
}

.blog-ad-slot-sidebar .blog-ad-container {
  margin: 0;
}

/* Sidebar ad: compact vertical layout */
.blog-ad-sidebar .blog-ad-inner {
  min-height: auto;
  padding: 24px 20px;
}

.blog-ad-sidebar .blog-ad-icon {
  width: 56px;
  height: 56px;
  font-size: 1.3rem;
  border-radius: 14px;
}

.blog-ad-sidebar .blog-ad-text h3 {
  font-size: 0.95rem;
}

.blog-ad-sidebar .blog-ad-text p {
  font-size: 0.8rem;
  -webkit-line-clamp: 3;
  line-clamp: 3;
}

@media(max-width: 768px) {
  .blog-ad-container { margin: 24px 0 }
  .blog-ad-inner { min-height: auto; padding: 24px 16px }
  .blog-ad-content { flex-direction: column; gap: 16px; text-align: center }
  .blog-ad-text { text-align: center }
  .blog-ad-icon { width: 56px; height: 56px; font-size: 1.3rem; border-radius: 14px }
  .blog-ad-slot-top { margin: 24px 0; }
  .blog-ad-slot-mid { margin: 28px 0; }
  .blog-ad-slot-bottom { margin: 28px 0 0; }
}

/* === Sidebar === */
.sidebar {
  position: sticky;
  top: 72px;
}
.sidebar-section {
  margin-bottom: 32px;
  padding: 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.sidebar-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent);
}

/* Sidebar: Reading Progress */
.reading-progress-sidebar {
  text-align: center;
  padding: 24px 20px;
}
.reading-progress-sidebar .progress-ring {
  width: 80px;
  height: 80px;
  margin: 0 auto 12px;
}
.reading-progress-sidebar .progress-text {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
}
.reading-progress-sidebar .progress-label {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  font-weight: 500;
}

/* Sidebar: TOC */
.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.toc-list li {
  margin-bottom: 2px;
}
.toc-list a {
  display: block;
  padding: 6px 12px;
  font-size: 0.82rem;
  color: var(--text-tertiary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: all var(--transition);
  line-height: 1.4;
}
.toc-list a:hover {
  color: var(--accent);
  background: var(--accent-light);
}
.toc-list a.active {
  color: var(--accent);
  background: var(--accent-light);
  border-left-color: var(--accent);
  font-weight: 600;
}
.toc-list .toc-h3 {
  padding-left: 28px;
  font-size: 0.78rem;
}

/* Sidebar: Recent Posts */
.sidebar-post {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
  margin-bottom: 4px;
}
.sidebar-post:hover { background: var(--accent-light) }
.sidebar-post .icon {
  font-size: 1.1rem;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--accent-light);
}
.sidebar-post .title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
}
.sidebar-post .date {
  font-size: 0.72rem;
  color: var(--text-tertiary);
  margin-top: 2px;
}

/* Sidebar: Tags */
.sidebar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.sidebar-tag {
  display: inline-block;
  padding: 5px 12px;
  background: var(--accent-light);
  border: 1px solid rgba(67, 56, 202, 0.08);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  transition: all var(--transition);
}
.sidebar-tag:hover {
  background: var(--accent-medium);
  border-color: rgba(67, 56, 202, 0.15);
}

/* Sidebar: Authors */
.sidebar-author {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.sidebar-author .initial {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #6366F1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.sidebar-author .name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
}
.sidebar-author .role {
  font-size: 0.72rem;
  color: var(--text-tertiary);
}

/* === Back Section === */
.back-section {
  text-align: center;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  grid-column: 1 / -1;
}
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
}
.back-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(67, 56, 202, 0.3);
}

/* === Footer === */
.blog-footer {
  background: var(--text-primary);
  color: rgba(255, 255, 255, 0.65);
  padding: 56px 24px 28px;
  margin-top: 0;
}
.blog-footer-content {
  max-width: 1100px;
  margin: 0 auto;
}
.blog-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 2fr;
  gap: 32px;
  margin-bottom: 32px;
}
.blog-footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.blog-footer-brand .name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
}
.blog-footer-brand .desc {
  font-size: 0.82rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.45);
}
.blog-footer-social {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}
.blog-footer-social a {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  font-size: 0.82rem;
  transition: all var(--transition);
}
.blog-footer-social a:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}
.blog-footer-col h4 {
  font-size: 0.78rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.blog-footer-col a {
  display: block;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  margin-bottom: 10px;
  transition: color var(--transition);
}
.blog-footer-col a:hover { color: #818CF8 }
.blog-footer-col-newsletter { grid-column: 5 }
.blog-footer-newsletter-text {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 14px;
  line-height: 1.6;
}
.blog-footer-newsletter-form {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}
.blog-footer-newsletter-form input {
  flex: 1;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  font-size: 0.85rem;
  font-family: inherit;
  outline: none;
}
.blog-footer-newsletter-form input::placeholder { color: rgba(255, 255, 255, 0.25) }
.blog-footer-newsletter-form input:focus { border-color: var(--accent) }
.blog-footer-newsletter-form button {
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-size: 0.85rem;
  transition: background var(--transition);
}
.blog-footer-newsletter-form button:hover { background: var(--accent-hover) }
.blog-footer-note {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.3);
}
.blog-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.blog-footer-bottom-links {
  display: flex;
  gap: 12px;
  font-size: 0.8rem;
}
.blog-footer-bottom-links a {
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
}
.blog-footer-bottom-links a:hover { color: #818CF8 }
.blog-footer-bottom-copy {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.3);
}
.blog-footer-payment-icons {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.blog-footer-payment-icons .payment-icon-text {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.2;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.blog-footer-payment-icons .payment-icon-text:hover {
  color: #818CF8;
  border-color: #818CF8;
}
.blog-footer-payment-icons .payment-icon-text svg { flex-shrink: 0 }
@media(max-width: 1024px) {
  .blog-footer-grid { grid-template-columns: 1fr 1fr; gap: 24px }
  .blog-footer-col-newsletter { grid-column: 1 / -1 }
}
@media(max-width: 768px) {
  .blog-footer-grid { grid-template-columns: 1fr; gap: 20px }
  .blog-footer-bottom { flex-direction: column; text-align: center }
}

/* === Mobile TOC (collapsible) === */
.mobile-toc {
  display: none;
  margin-bottom: 32px;
  padding: 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.mobile-toc-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  font-family: var(--font-body);
}
.mobile-toc-toggle span {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-primary);
}
.mobile-toc-toggle i {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  transition: transform 0.3s;
}
.mobile-toc.open .mobile-toc-toggle i {
  transform: rotate(180deg);
}
.mobile-toc .toc-list {
  display: none;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}
.mobile-toc.open .toc-list {
  display: block;
}

/* === Responsive === */
@media(max-width: 1024px) {
  .blog-wrapper {
    grid-template-columns: 1fr 260px;
    gap: 40px;
  }
}
@media(max-width: 768px) {
  .blog-wrapper {
    grid-template-columns: 1fr;
    padding: 16px;
  }
  .sidebar { display: none }
  .mobile-toc { display: block }
  .blog-wrapper h1 { font-size: 1.8rem }
  .article-hero { margin-bottom: 24px }
  .useful-links .grid { grid-template-columns: 1fr }
  .author-bio { flex-direction: column; text-align: center }
  .share-section { flex-wrap: wrap }
  .blog-cover { border-radius: var(--radius-md); margin-bottom: 28px }
  .breadcrumb-bar { padding: 12px 16px 0 }
  .blog-content > p:first-of-type::first-letter { font-size: 2.6em }
}
@media(max-width: 480px) {
  .blog-wrapper h1 { font-size: 1.5rem }
  .blog-content h2 { font-size: 1.35rem }
  .article-meta-row { font-size: 0.8rem; gap: 12px }
}

/* === Blog Homepage (kept for blog/index.html) === */
.blog-homepage { max-width: 1200px; margin: 0 auto; padding: 0 24px }
.blog-home-hero {
  text-align: center;
  padding: 60px 24px 40px;
  background: linear-gradient(180deg, var(--bg), #fff);
}
.blog-home-hero h1 {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--accent), #6366F1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.blog-home-hero p {
  font-size: 1.1rem;
  color: var(--text-tertiary);
  max-width: 600px;
  margin: 0 auto;
}
.blog-home-search {
  max-width: 500px;
  margin: 24px auto 0;
  position: relative;
}
.blog-home-search input {
  width: 100%;
  padding: 12px 20px 12px 44px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}
.blog-home-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(67, 56, 202, 0.1);
}
.blog-home-search .icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  font-size: 0.9rem;
}
.blog-home-featured { padding: 40px 0 }
.blog-home-featured h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}
.blog-home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}
.blog-home-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all 0.25s ease;
}
.blog-home-card:hover {
  border-color: rgba(67, 56, 202, 0.15);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.blog-home-card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: var(--border-light);
}
.blog-home-card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.blog-home-card-category {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.blog-home-card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.blog-home-card-desc {
  font-size: 0.82rem;
  color: var(--text-tertiary);
  line-height: 1.5;
  flex: 1;
  margin-bottom: 12px;
}
.blog-home-card-meta {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  display: flex;
  gap: 12px;
}
.blog-home-featured-card {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}
.blog-home-featured-card .blog-home-card-img {
  height: 100%;
  min-height: 280px;
}
.blog-home-categories {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}
.blog-home-categories h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}
.blog-home-cat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.blog-home-cat-chips a {
  display: inline-block;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition);
}
.blog-home-cat-chips a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}
@media(max-width: 768px) {
  .blog-home-hero h1 { font-size: 2rem }
  .blog-home-grid { grid-template-columns: 1fr }
  .blog-home-featured-card { grid-template-columns: 1fr }
  .blog-home-featured-card .blog-home-card-img { height: 200px }
}