/* -------------------------------------------------------------
 * Infoteck Modern IT Blog - Main Stylesheet
 * Optimized for SEO, High AdSense CTR, Markdown & Mermaid
 * ----------------------------------------------------------- */

/* Resets & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-secondary);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Reading Progress Bar */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--accent-gradient);
  z-index: 9999;
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.7);
  transition: width 0.1s ease-out;
}

/* Containers & Grid */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.site-content {
  flex: 1 0 auto;
  padding: 2.5rem 0 4rem;
}

.layout-with-sidebar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
}

.site-main {
  min-width: 0;
  max-width: 100%;
}

@media (min-width: 900px) {
  .layout-with-sidebar {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 2.25rem;
  }
}

/* Header & Glassmorphic Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal);
}

[data-theme="light"] .site-header {
  background: rgba(255, 255, 255, 0.88);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  text-decoration: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.site-brand:hover {
  opacity: 0.95;
}

.site-brand .brand-logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(145deg, rgba(30, 41, 59, 0.92) 0%, rgba(11, 15, 25, 0.96) 100%);
  border: 1.5px solid rgba(56, 189, 248, 0.4);
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.22), inset 0 1px 1px rgba(255, 255, 255, 0.15);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
}

.site-brand:hover .brand-logo-icon {
  border-color: rgba(56, 189, 248, 0.85);
  box-shadow: 0 0 24px rgba(56, 189, 248, 0.45), 0 0 10px rgba(168, 85, 247, 0.35);
  transform: translateY(-1.5px) scale(1.05);
}

.site-brand .brand-title {
  display: inline-flex;
  align-items: baseline;
  color: var(--text-primary);
  font-weight: 800;
}

.site-brand span.domain-ext {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 1.15rem;
  font-weight: 700;
}

/* Navigation: Desktop & Base */
.main-navigation ul {
  display: none;
  list-style: none;
  align-items: center;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
}

@media (min-width: 1024px) {
  .main-navigation ul {
    display: flex;
  }
}

.main-navigation a {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  position: relative;
  transition: color var(--transition-fast);
}

.main-navigation a:hover,
.main-navigation .current-menu-item > a {
  color: var(--text-primary);
}

.main-navigation a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-gradient);
  transition: width var(--transition-fast);
}

.main-navigation a:hover::after,
.main-navigation .current-menu-item > a::after {
  width: 100%;
}

/* Navigation: Mobile & Tablet Drawer (< 1024px) */
@media (max-width: 1023px) {
  .main-navigation {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    width: 100%;
    background: #0b0f19;
    border-bottom: 1px solid rgba(56, 189, 248, 0.25);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.75);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 0.25s ease,
                visibility 0.25s ease;
    z-index: 150;
  }

  [data-theme="light"] .main-navigation {
    background: #ffffff;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 24px 48px rgba(15, 23, 42, 0.14);
  }

  .main-navigation.is-open {
    max-height: calc(100vh - 72px);
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
  }

  .main-navigation ul {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
    padding: 1.25rem 1.25rem 1.75rem;
    margin: 0;
  }

  .main-navigation li {
    width: 100%;
    list-style: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  [data-theme="light"] .main-navigation li {
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  }

  .main-navigation li:last-child {
    border-bottom: none;
  }

  .main-navigation a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.95rem 1.15rem;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    border-radius: var(--radius-sm, 10px);
    background: transparent;
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
  }

  [data-theme="light"] .main-navigation a {
    color: #1e293b;
  }

  .main-navigation a:hover,
  .main-navigation .current-menu-item > a {
    background: rgba(56, 189, 248, 0.08);
    color: var(--accent-primary, #38bdf8);
    transform: translateX(4px);
  }

  [data-theme="light"] .main-navigation a:hover,
  [data-theme="light"] .main-navigation .current-menu-item > a {
    background: rgba(14, 165, 233, 0.08);
    color: #0284c7;
  }

  .main-navigation a::after {
    display: none;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .main-navigation ul {
    max-width: 720px;
    margin: 0 auto;
    padding: 1.5rem 2rem 2.25rem;
  }
}

/* Mobile & Tablet Menu Backdrop */
.mobile-menu-backdrop {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: calc(100vh - 72px);
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  z-index: 140;
  pointer-events: none;
}

.mobile-menu-backdrop.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

body.mobile-menu-open {
  overflow: hidden;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-icon {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  color: var(--accent-primary);
  border-color: var(--border-color-hover);
  transform: translateY(-1px);
}

.mobile-menu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 160;
}

.mobile-menu-btn .icon-close {
  display: none;
}

.mobile-menu-btn[aria-expanded="true"] {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: rgba(56, 189, 248, 0.12);
}

.mobile-menu-btn[aria-expanded="true"] .icon-hamburger {
  display: none;
}

.mobile-menu-btn[aria-expanded="true"] .icon-close {
  display: block;
}

@media (min-width: 1024px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* Header Quick Search Modal */
.header-search-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.2s;
}

.header-search-modal.is-open {
  opacity: 1;
  visibility: visible;
}

.header-search-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(11, 15, 25, 0.78);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

[data-theme="light"] .header-search-backdrop {
  background: rgba(15, 23, 42, 0.48);
}

.header-search-dialog {
  position: relative;
  width: 90%;
  max-width: 620px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(56, 189, 248, 0.15);
  padding: 1.25rem;
  z-index: 2;
  transform: translateY(-20px) scale(0.97);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.header-search-modal.is-open .header-search-dialog {
  transform: translateY(0) scale(1);
}

.header-search-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.95rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.header-search-bar:focus-within {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.header-search-icon {
  color: var(--accent-primary);
  display: flex;
  align-items: center;
}

.header-search-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.05rem;
  font-family: inherit;
  outline: none;
}

.header-search-input::placeholder {
  color: var(--text-muted);
}

.header-search-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.35rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

.header-search-close-btn:hover {
  color: var(--accent-primary);
}

.header-search-tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
}

.search-tag-label {
  color: var(--text-muted);
  font-weight: 600;
}

.search-tag-link {
  color: var(--text-secondary);
  background: var(--bg-elevated);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.search-tag-link:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: translateY(-1px);
}

/* Hero Tech Section */
.hero-tech-banner {
  background: radial-gradient(circle at top center, rgba(56, 189, 248, 0.12), transparent 70%);
  border-bottom: 1px solid var(--border-color);
  padding: 3.5rem 0 3rem;
  margin-bottom: 2.5rem;
}

.hero-content {
  text-align: center;
  max-width: 780px;
  margin: 0 auto;
}

.tech-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--accent-primary);
  padding: 0.35rem 0.9rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.tech-badge-dot {
  width: 7px;
  height: 7px;
  background: var(--accent-primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3.25rem;
  }
}

.hero-title .gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 620px;
  margin: 0 auto 1.75rem;
}

/* Category Filter Pills */
.category-filter-pills {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.pill-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.4rem 1rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.pill-item:hover, .pill-item.active {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.3);
}

/* Feed Section Header & Refresh Button */
.stream-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
  gap: 1rem;
}

.stream-section-title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
}

.stream-section-title svg {
  color: var(--accent-primary);
}

.btn-refresh-stream {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.4rem 0.95rem;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.22);
  border-radius: 9999px;
  color: var(--text-secondary);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  transition: all var(--transition-fast);
  user-select: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-refresh-stream:hover {
  background: rgba(56, 189, 248, 0.16);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.2);
}

.btn-refresh-stream:active {
  transform: translateY(0);
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
  display: inline-block;
  animation: pulse-live 2s infinite;
}

@keyframes pulse-live {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    transform: scale(1.15);
    box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

.refresh-icon {
  color: var(--accent-primary);
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-refresh-stream:hover .refresh-icon {
  transform: rotate(180deg);
}

.btn-refresh-stream.is-refreshing .refresh-icon {
  animation: spin-refresh 0.7s linear infinite;
}

@keyframes spin-refresh {
  100% {
    transform: rotate(360deg);
  }
}

/* 1-Column Main Post Stream (Homepage Feed) */
.posts-list-stream {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.post-row-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.post-row-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: transparent;
  transition: background var(--transition-fast);
}

.post-row-card:hover {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.post-row-card:hover::before {
  background: var(--accent-gradient);
}

.post-row-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.post-row-title {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.post-row-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.post-row-title a:hover {
  color: var(--accent-primary);
}

.post-row-date {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.post-row-date svg {
  color: var(--accent-primary);
  opacity: 0.85;
}

.post-row-readmore {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  flex-shrink: 0;
  white-space: nowrap;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent-primary);
  text-decoration: none;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-sm);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  transition: all var(--transition-fast);
}

.post-row-readmore svg {
  transition: transform var(--transition-fast);
}

.post-row-card:hover .post-row-readmore,
.post-row-readmore:hover {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.35);
}

.post-row-card:hover .post-row-readmore svg,
.post-row-readmore:hover svg {
  transform: translateX(3px);
}

@media (max-width: 768px) {
  /* Fix 1: Section Header no-wrap, balanced title & refresh pill */
  .stream-section-header {
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
  }

  .stream-section-title {
    font-size: 1.05rem;
    font-weight: 800;
    white-space: nowrap;
    letter-spacing: -0.01em;
    min-width: 0;
    gap: 0.4rem;
  }

  .stream-section-title svg {
    width: 17px;
    height: 17px;
    flex-shrink: 0;
  }

  .btn-refresh-stream {
    padding: 0.35rem 0.65rem;
    font-size: 0.76rem;
    gap: 0.35rem;
    flex-shrink: 0;
  }

  .btn-refresh-stream .refresh-icon {
    width: 12px;
    height: 12px;
  }

  /* Fix 2: Compact, harmonious mobile post cards */
  .posts-list-stream {
    gap: 0.75rem;
  }

  .post-row-card {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    row-gap: 0.55rem;
    column-gap: 0.75rem;
    align-items: center;
    padding: 0.85rem 1rem;
    border-radius: 12px;
  }

  .post-row-info {
    display: contents;
  }

  .post-row-title {
    grid-column: 1 / -1;
    font-size: 0.98rem;
    line-height: 1.4;
    margin: 0;
    -webkit-line-clamp: 2;
  }

  .post-row-date {
    grid-column: 1 / 2;
    font-size: 0.76rem;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 4px;
  }

  .post-row-date svg {
    width: 12px;
    height: 12px;
  }

  .post-row-readmore {
    grid-column: 2 / 3;
    margin-left: auto;
    align-self: center;
    padding: 0.28rem 0.65rem;
    font-size: 0.78rem;
    font-weight: 700;
    gap: 4px;
    border-radius: 6px;
  }

  .post-row-readmore svg {
    width: 13px;
    height: 13px;
  }
}

@media (max-width: 360px) {
  .stream-section-title {
    font-size: 0.96rem;
  }
  .btn-refresh-stream {
    padding: 0.3rem 0.5rem;
    font-size: 0.72rem;
  }
}

/* Post Cards Grid */
.posts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

@media (min-width: 640px) {
  .posts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.post-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-md), var(--accent-glow);
}

.post-card-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-elevated);
}

.post-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.post-card:hover .post-card-thumb img {
  transform: scale(1.05);
}

.post-card-category {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  color: var(--accent-primary);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.post-card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.post-card-meta span {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.post-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.75rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.post-card-title a {
  color: var(--text-primary);
}

.post-card-title a:hover {
  color: var(--accent-primary);
}

.post-card-excerpt {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex: 1 1 auto;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  margin-top: auto;
}

.read-more-link {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.read-more-link svg {
  transition: transform var(--transition-fast);
}

.read-more-link:hover svg {
  transform: translateX(3px);
}

/* Single Article Layout */
.single-article-header {
  margin-bottom: 2rem;
}

/* Modern High-Tech Breadcrumbs */
.breadcrumbs-nav {
  margin-bottom: 1.25rem;
}

.breadcrumbs-list {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
  list-style: none;
  margin: 0;
  padding: 0.4rem 0.95rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  line-height: 1.4;
  box-shadow: var(--shadow-sm);
}

.bc-item {
  display: inline-flex;
  align-items: center;
  color: var(--text-muted);
}

.bc-item a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast);
}

.bc-item a:hover {
  color: var(--accent-primary);
}

.bc-home-icon {
  color: var(--accent-primary);
}

.bc-separator {
  display: inline-flex;
  align-items: center;
  color: var(--text-muted);
  opacity: 0.6;
}

.bc-item.active {
  color: var(--accent-primary);
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 200px;
}

@media (min-width: 768px) {
  .bc-item.active {
    max-width: 460px;
  }
}

.article-title {
  font-size: clamp(1.65rem, 4vw + 0.5rem, 2.75rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  word-break: break-word;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.85rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 500;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.meta-dot {
  color: var(--text-muted);
  opacity: 0.5;
}

.article-cat-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.65rem;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.22);
  border-radius: var(--radius-sm);
  color: var(--accent-primary);
  font-weight: 700;
  font-size: 0.82rem;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.article-cat-pill:hover {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  transform: translateY(-1px);
}

/* ========================================================
 * Markdown & Content Formatting (WP Githuber MD Support)
 * ====================================================== */
.entry-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-primary);
}

.entry-content p {
  margin-bottom: 1.5rem;
}

.entry-content h1,
.entry-content h2,
.entry-content h3,
.entry-content h4,
.entry-content h5,
.entry-content h6 {
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1.3;
  letter-spacing: -0.015em;
  position: relative;
}

.entry-content h2 {
  font-size: 1.75rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.entry-content h2::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--accent-gradient);
}

.entry-content h3 {
  font-size: 1.4rem;
}

.entry-content h4 {
  font-size: 1.15rem;
}

.entry-content ul,
.entry-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.75rem;
}

.entry-content li {
  margin-bottom: 0.5rem;
}

.entry-content blockquote {
  background: var(--bg-card);
  border-left: 4px solid var(--accent-primary);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-secondary);
  font-style: italic;
  font-size: 1.05rem;
}

/* Terminal Style Code Blocks */
/* Terminal Style Code Blocks (Soft-Wrap Supported, No Horizontal Scrollbar) */
.entry-content pre {
  background-color: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin: 1.75rem 0;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  white-space: pre-wrap !important;
  word-wrap: break-word !important;
  overflow-wrap: break-word !important;
  word-break: break-word !important;
}

.code-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background: rgba(0, 0, 0, 0.35);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.window-dots {
  display: flex;
  align-items: center;
  gap: 6px;
}

.window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.window-dots .dot-red { background-color: #ef4444; }
.window-dots .dot-yellow { background-color: #f59e0b; }
.window-dots .dot-green { background-color: #10b981; }

.copy-code-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-code-btn:hover {
  background: var(--accent-primary);
  color: #fff;
}

.entry-content pre code,
.entry-content pre[class*="language-"] code,
.entry-content code[class*="language-"] {
  display: block;
  padding: 1.25rem 1.25rem;
  overflow-x: hidden !important;
  white-space: pre-wrap !important;
  word-wrap: break-word !important;
  overflow-wrap: break-word !important;
  word-break: break-word !important;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--code-text);
  tab-size: 2;
  -moz-tab-size: 2;
}

.entry-content :not(pre) > code {
  background: var(--bg-elevated);
  color: var(--accent-primary);
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.2em 0.45em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

/* Markdown Tables */
.entry-content table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  margin: 1.75rem 0;
  font-size: 0.95rem;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.entry-content th,
.entry-content td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.entry-content th {
  background: var(--bg-elevated);
  font-weight: 700;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
}

.entry-content tr:hover td {
  background: rgba(56, 189, 248, 0.04);
}

/* ========================================================
 * Mermaid Diagrams & Interactive Zoom Lightbox
 * ====================================================== */
.mermaid-block-container {
  position: relative;
  margin: 2.25rem 0;
  border-radius: var(--radius-lg, 12px);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

[data-theme="dark"] .mermaid-block-container,
.dark-theme .mermaid-block-container,
body.dark-mode .mermaid-block-container {
  background: #0f172a;
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.mermaid-block-container:hover {
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.12);
}

.mermaid-block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.65rem 1rem;
  background: rgba(0, 0, 0, 0.03);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-muted);
}

[data-theme="dark"] .mermaid-block-header,
.dark-theme .mermaid-block-header,
body.dark-mode .mermaid-block-header {
  background: rgba(255, 255, 255, 0.03);
  border-bottom-color: rgba(255, 255, 255, 0.07);
}

.mermaid-header-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  text-transform: uppercase;
}

.mermaid-header-title svg {
  color: var(--accent-primary, #6366f1);
}

.mermaid-badge {
  font-size: 0.68rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-primary, #818cf8);
  border: 1px solid rgba(99, 102, 241, 0.25);
  font-weight: 700;
  letter-spacing: 0;
}

.mermaid-zoom-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid rgba(99, 102, 241, 0.3);
  background: rgba(99, 102, 241, 0.08);
  color: var(--accent-primary, #818cf8);
  transition: all 0.2s ease;
}

.mermaid-zoom-btn:hover {
  background: var(--accent-primary, #6366f1);
  color: #ffffff;
  border-color: var(--accent-primary, #6366f1);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.mermaid-scroll-body {
  position: relative;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 1.5rem 1rem;
  text-align: center;
  cursor: zoom-in;
}

.mermaid-scroll-body .mermaid,
.mermaid-scroll-body div.mermaid {
  margin: 0 !important;
  padding: 0 !important;
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
}

.mermaid-click-hint {
  position: absolute;
  right: 1rem;
  bottom: 0.8rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.65rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(15, 23, 42, 0.85);
  color: #f1f5f9;
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  opacity: 0;
  transform: translateY(4px);
  transition: all 0.25s ease;
  pointer-events: none;
}

.mermaid-scroll-body:hover .mermaid-click-hint {
  opacity: 1;
  transform: translateY(0);
}

.mermaid svg {
  max-width: 100% !important;
  height: auto !important;
  display: block;
  margin: 0 auto;
}

/* ========================================================
 * Mermaid Lightbox Zoom Modal (Responsive for Desktop/iPad/Mobile)
 * ====================================================== */
.mermaid-modal {
  position: fixed;
  inset: 0;
  z-index: 999999;
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.25s ease;
}

.mermaid-modal.is-active {
  opacity: 1;
  visibility: visible;
}

.mermaid-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 15, 29, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.mermaid-modal-container {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.mermaid-modal-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.25rem;
  background: rgba(15, 23, 42, 0.95);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: #f8fafc;
  z-index: 10;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  flex-shrink: 0;
}

.mermaid-toolbar-info {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.mermaid-toolbar-icon {
  color: #06b6d4;
  display: flex;
  align-items: center;
}

.mermaid-toolbar-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #f1f5f9;
}

.mermaid-scale-badge {
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-mono, monospace);
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.4);
}

.mermaid-toolbar-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mermaid-ctrl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-width: 38px;
  height: 38px;
  padding: 0 0.65rem;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #f1f5f9;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.mermaid-ctrl-btn:hover {
  background: rgba(99, 102, 241, 0.3);
  border-color: rgba(99, 102, 241, 0.6);
  color: #ffffff;
  transform: translateY(-1px);
}

.mermaid-ctrl-btn:active {
  transform: scale(0.95);
}

.mermaid-ctrl-btn.mermaid-close-btn {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.3);
  color: #fca5a5;
  margin-left: 0.5rem;
}

.mermaid-ctrl-btn.mermaid-close-btn:hover {
  background: #ef4444;
  border-color: #ef4444;
  color: #ffffff;
}

.mermaid-viewport {
  position: relative;
  flex: 1;
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  user-select: none;
  touch-action: none;
  background-image: radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
}

.mermaid-viewport.is-dragging {
  cursor: grabbing !important;
}

.mermaid-canvas {
  transform-origin: center center;
  will-change: transform;
  display: inline-block;
  padding: 2.5rem;
  background: var(--bg-card, #0f172a);
  border-radius: var(--radius-lg, 16px);
  border: 1px solid var(--border-color, rgba(255, 255, 255, 0.1));
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
  transition: transform 0.05s ease-out;
}

.mermaid-canvas svg {
  max-width: none !important;
  height: auto !important;
  display: block;
  filter: drop-shadow(0 10px 35px rgba(0, 0, 0, 0.35));
}

.mermaid-modal-footer {
  padding: 0.5rem 1rem;
  text-align: center;
  font-size: 0.75rem;
  color: #94a3b8;
  background: rgba(15, 23, 42, 0.95);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}

.mermaid-tip-mobile {
  display: none;
}

@media (max-width: 768px) {
  .mermaid-ctrl-btn .ctrl-tip {
    display: none;
  }
  .mermaid-ctrl-btn {
    min-width: 40px;
    height: 40px;
    padding: 0;
  }
  .mermaid-toolbar-title {
    font-size: 0.85rem;
  }
  .mermaid-modal-toolbar {
    padding: 0.5rem 0.75rem;
  }
  .mermaid-tip-desktop {
    display: none;
  }
  .mermaid-tip-mobile {
    display: inline;
  }
  .mermaid-canvas {
    padding: 1.5rem;
  }
}


/* ========================================================
 * Google AdSense Placement Units (High CTR, SEO Compliant)
 * ====================================================== */
.infoteck-ad-slot {
  margin: 2rem 0;
  text-align: center;
  background: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  overflow: hidden;
  position: relative;
}

.ad-label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  font-weight: 700;
}

.ad-slot-header {
  margin-top: 1rem;
  margin-bottom: 2rem;
}

.ad-slot-sidebar-sticky {
  position: sticky;
  top: 90px;
}

.ad-preview-active {
  background: var(--bg-card);
  border: 2px dashed rgba(56, 189, 248, 0.4);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

.ad-preview-box {
  min-height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.88rem;
  background: rgba(56, 189, 248, 0.03);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1rem;
  gap: 0.35rem;
}

.ad-preview-icon-wrap {
  color: var(--accent-primary);
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ad-preview-title {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.ad-preview-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.ad-preview-link {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-primary) !important;
  text-decoration: underline;
  margin-top: 0.35rem;
  transition: opacity 0.2s ease;
}

.ad-preview-link:hover {
  opacity: 0.8;
}

/* Sidebar Widgets */
.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.widget-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--border-color);
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.widget-title::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--accent-gradient);
}

.widget-recent-posts ul {
  list-style: none;
}

.widget-recent-post-item {
  display: flex;
  gap: 0.85rem;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.widget-recent-post-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 0;
}

.widget-post-thumb {
  width: 68px;
  height: 68px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-elevated);
}

.widget-post-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.widget-post-info h4 {
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 0.3rem;
}

.widget-post-info a {
  color: var(--text-primary);
}

.widget-post-info a:hover {
  color: var(--accent-primary);
}

.widget-post-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Author Bio Box */
.author-bio-card {
  display: flex;
  gap: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin: 3rem 0;
  align-items: center;
}

.author-bio-avatar img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px solid var(--accent-primary);
}

.author-bio-info h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.author-bio-info p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* Related Posts */
.related-posts-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.related-posts-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

/* Pagination */
.pagination-nav {
  margin-top: 3rem;
  display: flex;
  justify-content: center;
  gap: 0.5rem;
}

.pagination-nav .page-numbers {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-weight: 700;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.pagination-nav .page-numbers:hover,
.pagination-nav .page-numbers.current {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

/* Site Footer - Ultra Sleek Single Bottom Bar */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 1.25rem 0;
  margin-top: auto;
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    text-align: left;
    padding-right: 3.5rem; /* Space so floating back-to-top button doesn't cover text */
  }
}

.footer-copyright {
  color: var(--text-muted);
  font-size: 0.85rem;
  white-space: nowrap;
}

.footer-copyright strong {
  color: var(--text-primary);
  font-weight: 700;
}

.footer-nav-menu .footer-links-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.75rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-nav-menu .footer-links-list li {
  margin: 0;
  display: inline-flex;
  align-items: center;
}

.footer-nav-menu .footer-links-list a {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-nav-menu .footer-links-list a:hover {
  color: var(--accent-primary);
}

/* Floating Back to Top Button */
.back-to-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

.back-to-top-btn.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top-btn:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.back-to-top-btn:active {
  transform: translateY(-1px);
}

/* ========================================================
 * Hero Search Form (Redesigned & High Aesthetics)
 * ====================================================== */
.hero-search-form {
  max-width: 640px;
  margin: 1.75rem auto 1.5rem;
  position: relative;
}

.hero-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1.5px solid var(--border-color);
  border-radius: 9999px;
  padding: 0.45rem 0.55rem 0.45rem 1.35rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.05);
  transition: all var(--transition-normal);
}

.hero-search-wrap:hover {
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.35), 0 0 20px rgba(56, 189, 248, 0.15);
}

.hero-search-wrap:focus-within {
  border-color: var(--accent-primary);
  background: var(--bg-elevated);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.4), var(--accent-glow);
  transform: translateY(-2px);
}

.hero-search-icon {
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 0.85rem;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.hero-search-wrap:focus-within .hero-search-icon {
  transform: scale(1.1);
}

.hero-search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  padding: 0.4rem 0;
}

.hero-search-input::placeholder {
  color: var(--text-muted);
  font-size: 0.92rem;
  transition: opacity var(--transition-fast);
}

.hero-search-input:focus::placeholder {
  opacity: 0.6;
}

.hero-search-submit {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-gradient);
  color: #ffffff;
  border: none;
  border-radius: 9999px;
  padding: 0.65rem 1.45rem;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.3);
  transition: all var(--transition-normal);
}

.hero-search-submit:hover {
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.45);
}

.hero-search-submit:active {
  transform: translateY(0) scale(0.98);
}

/* Quick Search Suggestions */
.hero-search-suggestions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.85rem;
  font-size: 0.82rem;
}

.hero-search-suggestions .suggest-label {
  color: var(--text-muted);
  font-weight: 600;
}

.hero-search-suggestions a {
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  padding: 0.15rem 0.65rem;
  border-radius: 9999px;
  transition: all var(--transition-fast);
}

[data-theme="light"] .hero-search-suggestions a {
  background: rgba(0, 0, 0, 0.04);
}

.hero-search-suggestions a:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: rgba(56, 189, 248, 0.1);
  transform: translateY(-1px);
}

/* ========================================================
 * Pagination (Trang chủ & Archive)
 * ====================================================== */
.pagination-nav {
  margin-top: 3.5rem;
  margin-bottom: 2rem;
  display: flex;
  justify-content: center;
}

.pagination-nav .navigation.pagination {
  width: 100%;
}

.pagination-nav .nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.pagination-nav .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 44px;
  padding: 0 1rem;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.pagination-nav .page-numbers:hover {
  background: var(--bg-elevated);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md), var(--accent-glow);
}

.pagination-nav .page-numbers.current {
  background: var(--accent-gradient);
  border-color: transparent;
  color: #ffffff !important;
  box-shadow: 0 4px 16px rgba(56, 189, 248, 0.4);
  transform: translateY(-1px);
}

.pagination-nav .page-numbers.prev,
.pagination-nav .page-numbers.next {
  font-size: 0.9rem;
  padding: 0 1.25rem;
  gap: 6px;
}

.pagination-nav .page-numbers.dots {
  border: none;
  background: transparent;
  color: var(--text-muted);
  box-shadow: none;
  cursor: default;
}

/* ========================================================
 * Sidebar Rich Widgets
 * ====================================================== */
/* 1. Sidebar Search Widget */
.widget-sidebar-search {
  padding: 1.5rem;
}

.sidebar-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.sidebar-search-icon {
  position: absolute;
  left: 1rem;
  color: var(--text-muted);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-search-input {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 2.8rem 0.75rem 2.6rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  outline: none;
  transition: all var(--transition-fast);
}

.sidebar-search-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
  background: var(--bg-card);
}

.sidebar-search-btn {
  position: absolute;
  right: 6px;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--accent-gradient);
  border: none;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sidebar-search-btn:hover {
  transform: translateX(2px);
  box-shadow: 0 2px 8px rgba(56, 189, 248, 0.4);
}

/* Newsletter Widget */
.widget-newsletter {
  background: linear-gradient(145deg, rgba(14, 165, 233, 0.08) 0%, rgba(99, 102, 241, 0.08) 100%);
  border: 1px solid rgba(56, 189, 248, 0.25);
  position: relative;
  overflow: hidden;
}

.widget-newsletter::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

.newsletter-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.newsletter-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.newsletter-form {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.newsletter-input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  outline: none;
  transition: all var(--transition-fast);
}

.newsletter-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.2);
}

.newsletter-btn {
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.3);
  transition: all var(--transition-fast);
}

.newsletter-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(56, 189, 248, 0.45);
}

.newsletter-privacy {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 0.5rem;
}

/* Trending Tech Tags Cloud */
.tech-tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.35rem 0.8rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.tech-tag-pill:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
}

.tech-tag-pill .tag-count {
  font-size: 0.72rem;
  opacity: 0.8;
  background: rgba(255, 255, 255, 0.15);
  padding: 1px 6px;
  border-radius: 9999px;
}

/* Category List in Sidebar */
.category-sidebar-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.category-sidebar-item {
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.category-sidebar-item:last-child {
  border-bottom: none;
}

.category-sidebar-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.35rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.category-sidebar-item a:hover {
  color: var(--accent-primary);
  background: var(--bg-elevated);
}

.cat-item-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cat-chevron {
  color: var(--text-muted);
  transition: transform var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
}

.category-sidebar-item a:hover .cat-chevron {
  transform: translateX(3px);
  color: var(--accent-primary);
}

.cat-name {
  color: inherit;
}

.category-count-badge {
  background: var(--bg-elevated);
  color: var(--accent-primary);
  border: 1px solid var(--border-color);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 9999px;
  transition: all var(--transition-fast);
}

.category-sidebar-item a:hover .category-count-badge {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

/* Ranked Recent Posts (01, 02, 03) */
.ranked-posts-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.ranked-post-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border-color);
}

.ranked-post-item:last-child {
  border-bottom: none;
}

.post-rank-number {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent-primary);
  line-height: 1;
  opacity: 0.8;
  min-width: 28px;
}

.ranked-post-content h4 {
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.25rem;
}

.ranked-post-content a {
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.ranked-post-content a:hover {
  color: var(--accent-primary);
}

.ranked-post-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}


/* ========================================================
 * Table of Contents (TOC) - SEO & Reader Experience
 * ====================================================== */
.infoteck-toc {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-primary);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.toc-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-toggle-btn {
  background: none;
  border: none;
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.toc-toggle-btn:hover {
  background: rgba(56, 189, 248, 0.1);
}

.toc-list {
  list-style: none;
  margin-top: 1rem;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-top: 1px solid var(--border-color);
  padding-top: 0.85rem;
}

.toc-item a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  display: inline-block;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.toc-subitem {
  padding-left: 1.25rem;
}

.toc-subitem a {
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 500;
  display: inline-block;
  transition: color var(--transition-fast);
}

.toc-item a:hover,
.toc-subitem a:hover {
  color: var(--accent-primary);
  transform: translateX(3px);
}

.anchored-heading {
  scroll-margin-top: 80px;
}

/* ========================================================
 * Social Share Buttons
 * ====================================================== */
.social-share-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 2rem 0;
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.share-label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-right: 0.35rem;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.4rem 0.9rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.share-fb {
  background: #1877f2;
  color: #fff !important;
}

.share-fb:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.share-x {
  background: #000;
  color: #fff !important;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

[data-theme="light"] .share-x {
  background: #0f172a;
}

.share-x:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.share-linkedin {
  background: #0a66c2;
  color: #fff !important;
}

.share-linkedin:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.share-copy {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.share-copy:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* ========================================================
 * Legal & Policy Pages
 * ====================================================== */
.page-article .lead {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-primary);
  background: rgba(56, 189, 248, 0.05);
  border-left: 3px solid var(--accent-primary);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 2rem;
}

.page-article h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-top: 2.25rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border-color);
}

.page-article p {
  margin-bottom: 1.25rem;
}

.page-article ul {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.page-article li {
  margin-bottom: 0.5rem;
}

/* ========================================================
 * Homepage Optimizations: Flagship Card, Tech Banners, Highlights
 * ====================================================== */

/* Quick Tech Highlights Bar */
.hero-tech-highlights {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin: 1.5rem 0 1.75rem;
}

.highlight-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  backdrop-filter: blur(8px);
  transition: all var(--transition-fast);
}

.highlight-chip:hover {
  background: rgba(56, 189, 248, 0.08);
  border-color: rgba(56, 189, 248, 0.3);
  color: var(--accent-primary);
  transform: translateY(-1px);
}

.pill-count {
  font-size: 0.75rem;
  opacity: 0.75;
  font-weight: 500;
}

/* Featured Flagship Hero Post Card */
.featured-flagship-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 2.25rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.5);
  transition: all var(--transition-normal);
}

@media (min-width: 900px) {
  .featured-flagship-card {
    grid-template-columns: 1.15fr 1fr;
    align-items: center;
    padding: 1.75rem;
  }
}

.featured-flagship-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 20px 40px -15px rgba(56, 189, 248, 0.2), 0 0 0 1px rgba(56, 189, 248, 0.3);
  transform: translateY(-3px);
}

.flagship-thumb-col {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.flagship-thumb-col a {
  display: block;
  width: 100%;
  height: 100%;
}

.flagship-spotlight-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(56, 189, 248, 0.5);
  color: #38bdf8;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
  backdrop-filter: blur(8px);
  text-transform: uppercase;
}

.spotlight-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #38bdf8;
  box-shadow: 0 0 8px #38bdf8;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

.flagship-body-col {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.flagship-category-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: #38bdf8;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  position: static !important;
  transition: all var(--transition-fast);
}

.flagship-category-badge:hover {
  background: rgba(56, 189, 248, 0.25);
  border-color: #38bdf8;
  color: #fff;
}

.flagship-reading-stat {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.post-card-date {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.meta-reading-time {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.flagship-title {
  font-size: 1.65rem;
  font-weight: 800;
  line-height: 1.35;
  margin: 0.75rem 0 1rem;
  color: var(--text-primary);
}

.flagship-title a {
  color: inherit;
  transition: color var(--transition-fast);
}

.flagship-title a:hover {
  color: var(--accent-primary);
}

.flagship-excerpt {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 1.5rem;
}

.flagship-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.btn-flagship-read {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-gradient);
  color: #fff !important;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.25);
  transition: all var(--transition-fast);
}

.btn-flagship-read:hover {
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.4);
  transform: translateY(-2px);
}

.feed-section-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 2rem 0 1.5rem;
}

.divider-line {
  flex: 1;
  height: 1px;
  background: var(--border-color);
}

.divider-text {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

/* High-Tech Dynamic SVG Banner Fallback */
.tech-fallback-banner {
  width: 100%;
  height: 100%;
  min-height: 200px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.25rem;
  overflow: hidden;
  user-select: none;
}

.tech-banner-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.tech-banner-center {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: auto 0;
  text-align: center;
}

.tech-icon-circle {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.6rem;
  transition: transform var(--transition-normal);
}

.post-card:hover .tech-icon-circle,
.featured-flagship-card:hover .tech-icon-circle {
  transform: scale(1.1) rotate(4deg);
}

.tech-cat-label {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.tech-banner-footer {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tech-card-pill {
  font-family: 'Fira Code', monospace;
  font-size: 0.72rem;
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  backdrop-filter: blur(4px);
}

/* -------------------------------------------------------------
 * High-Tech 403 & 404 Error Pages
 * ----------------------------------------------------------- */
.error-page-main {
  min-height: calc(100vh - 350px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 0 5rem;
}

.error-page-card {
  max-width: 860px;
  margin: 0 auto;
  padding: 3.5rem 2.5rem;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition-normal);
}

.error-card-404 {
  background: radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.08) 0%, var(--bg-card) 60%);
}

.error-card-403 {
  background: radial-gradient(circle at 50% 0%, rgba(245, 158, 11, 0.08) 0%, var(--bg-card) 60%);
}

/* Status Pill */
.error-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1.15rem;
  border-radius: 9999px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.error-badge-404 {
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: #38bdf8;
}

.error-badge-403 {
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: #fbbf24;
}

.error-ping-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  position: relative;
}

.error-ping-dot.cyan {
  background-color: #38bdf8;
  box-shadow: 0 0 10px #38bdf8;
  animation: pulse-ping 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.error-ping-dot.amber {
  background-color: #f59e0b;
  box-shadow: 0 0 10px #f59e0b;
  animation: pulse-ping 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse-ping {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.3);
  }
}

/* Hero Code Visual */
.error-hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 140px;
  margin-bottom: 0.5rem;
}

.error-code-glow {
  position: absolute;
  font-family: var(--font-mono);
  font-size: clamp(6.5rem, 15vw, 9.5rem);
  font-weight: 900;
  line-height: 1;
  filter: blur(36px);
  opacity: 0.38;
  user-select: none;
  pointer-events: none;
}

.error-glow-cyan {
  color: #38bdf8;
}

.error-glow-amber {
  color: #ef4444;
}

.error-code-text {
  position: relative;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: clamp(5.8rem, 14vw, 8.5rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
  user-select: none;
}

.error-text-cyan {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.error-text-amber {
  background: linear-gradient(135deg, #fbbf24 0%, #f97316 50%, #ef4444 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.error-hero-icon-wrap {
  position: absolute;
  z-index: 3;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  right: calc(50% - 105px);
  bottom: 0;
  animation: float-badge 3.5s ease-in-out infinite;
}

.error-hero-icon-wrap.cyan {
  background: #0b0f19;
  border: 2px solid #38bdf8;
  color: #38bdf8;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.4);
}

.error-hero-icon-wrap.amber {
  background: #0b0f19;
  border: 2px solid #f59e0b;
  color: #f59e0b;
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.4);
}

@keyframes float-badge {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

.error-mono-sub {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin-bottom: 1.25rem;
}

/* Headings & Descriptions */
.error-title {
  font-size: clamp(1.65rem, 3.8vw, 2.25rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.error-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 620px;
  margin: 0 auto 2.25rem;
}

/* Action Buttons */
.error-actions-group {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.btn-error-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--accent-gradient);
  color: #ffffff !important;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.75rem 1.65rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-error-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(56, 189, 248, 0.45);
}

.btn-error-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-primary) !important;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-error-secondary:hover {
  border-color: var(--border-color-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.btn-error-report:hover {
  border-color: rgba(245, 158, 11, 0.6);
  color: #f59e0b !important;
}

/* Search Box Inside Error Page */
.error-search-box {
  max-width: 580px;
  margin: 0 auto 2.5rem;
  text-align: left;
}

.error-search-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  text-align: center;
}

.error-search-form {
  display: flex;
  align-items: center;
  background: var(--bg-elevated);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.35rem 0.45rem 0.35rem 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.error-search-form:focus-within {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.18);
}

.error-search-icon {
  color: var(--text-muted);
  margin-right: 0.65rem;
  flex-shrink: 0;
}

.error-search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-primary);
  min-width: 0;
}

.error-search-input::placeholder {
  color: var(--text-muted);
}

.btn-error-submit {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.55rem 1.15rem;
  font-weight: 700;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.btn-error-submit:hover {
  background: var(--accent-secondary);
  transform: translateX(2px);
}

/* Category Topics */
.error-topics-section {
  max-width: 720px;
  margin: 0 auto 2.5rem;
}

.error-topics-label {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.error-topics-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.55rem;
}

.error-cat-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary) !important;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.error-cat-pill:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary) !important;
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.cat-pill-dot {
  font-family: var(--font-mono);
  font-weight: 800;
  color: var(--accent-primary);
}

.cat-pill-count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: rgba(255, 255, 255, 0.08);
  padding: 0.1rem 0.45rem;
  border-radius: 9999px;
  color: var(--text-muted);
}

/* Terminal Diagnostics Window */
.error-terminal-wrapper {
  max-width: 700px;
  margin: 0 auto;
  background: #090d16;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-align: left;
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.45);
}

.error-terminal-header {
  background: rgba(17, 24, 39, 0.95);
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.terminal-dots {
  display: flex;
  gap: 6px;
  align-items: center;
}

.t-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}

.dot-red {
  background-color: #ef4444;
}

.dot-yellow {
  background-color: #f59e0b;
}

.dot-green {
  background-color: #10b981;
}

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: #94a3b8;
}

.terminal-id {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #64748b;
}

.error-terminal-body {
  padding: 1.15rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.65;
}

.term-line {
  margin-bottom: 0.25rem;
  word-break: break-all;
}

.term-line:last-child {
  margin-bottom: 0;
}

.term-prompt {
  color: #38bdf8;
  font-weight: 700;
  margin-right: 0.4rem;
}

.term-cmd {
  color: #f8fafc;
  font-weight: 600;
}

.term-dim {
  color: #64748b;
}

.term-warn {
  color: #fbbf24;
}

.term-danger {
  color: #f87171;
}

.term-success {
  color: #34d399;
}

/* Light Mode Overrides for Error Pages */
[data-theme="light"] .error-card-404 {
  background: radial-gradient(circle at 50% 0%, rgba(2, 132, 199, 0.06) 0%, #ffffff 60%);
  border-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .error-card-403 {
  background: radial-gradient(circle at 50% 0%, rgba(245, 158, 11, 0.06) 0%, #ffffff 60%);
  border-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .error-hero-icon-wrap.cyan {
  background: #ffffff;
}

[data-theme="light"] .error-hero-icon-wrap.amber {
  background: #ffffff;
}

[data-theme="light"] .cat-pill-count {
  background: rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .error-terminal-wrapper {
  background: #0f172a;
  border-color: rgba(0, 0, 0, 0.15);
}

@media (max-width: 640px) {
  .error-page-card {
    padding: 2.25rem 1.25rem;
  }
  .error-hero-visual {
    height: 110px;
  }
  .error-hero-icon-wrap {
    width: 42px;
    height: 42px;
    right: calc(50% - 85px);
  }
  .error-hero-icon-wrap svg {
    width: 24px;
    height: 24px;
  }
  .error-actions-group {
    flex-direction: column;
    width: 100%;
  }
  .btn-error-primary,
  .btn-error-secondary {
    width: 100%;
    justify-content: center;
  }
}

/* ==========================================================================
   Dark & Light Theme Harmony System (Infoteck Premium Dual-Mode)
   Optimized for Typography, High Contrast & Flawless Visual Hierarchy
   ========================================================================== */

/* 1. Header & Navigation Harmony */
[data-theme="light"] .site-header {
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .site-brand,
[data-theme="light"] .site-brand .brand-title {
  color: #0f172a;
}

[data-theme="light"] .site-brand .brand-logo-icon {
  background: linear-gradient(145deg, #1e293b 0%, #0f172a 100%);
  border-color: rgba(14, 165, 233, 0.45);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.12), 0 0 10px rgba(56, 189, 248, 0.18);
}

[data-theme="light"] .main-navigation a {
  color: #334155;
}

[data-theme="light"] .main-navigation a:hover,
[data-theme="light"] .main-navigation .current-menu-item > a {
  color: #0284c7;
  background: rgba(2, 132, 199, 0.08);
}

[data-theme="light"] .btn-icon {
  color: #334155;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.09);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .btn-icon:hover {
  color: #0284c7;
  border-color: rgba(2, 132, 199, 0.35);
  background: rgba(2, 132, 199, 0.06);
}

/* 2. Hero Section Harmony */
[data-theme="light"] .tech-badge-hub {
  background: rgba(2, 132, 199, 0.08);
  border-color: rgba(2, 132, 199, 0.25);
  color: #0284c7;
}

[data-theme="light"] .hero-title {
  color: #0f172a;
}

[data-theme="light"] .hero-desc {
  color: #475569;
}

[data-theme="light"] .hero-search-wrap {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.1);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .hero-search-wrap:hover {
  border-color: rgba(2, 132, 199, 0.4);
  box-shadow: 0 12px 35px rgba(2, 132, 199, 0.1);
}

[data-theme="light"] .hero-search-wrap:focus-within {
  background: #ffffff;
  border-color: #0284c7;
  box-shadow: 0 14px 40px rgba(2, 132, 199, 0.15), 0 0 0 3px rgba(2, 132, 199, 0.12);
}

[data-theme="light"] .hero-search-input {
  color: #0f172a;
}

[data-theme="light"] .hero-search-input::placeholder {
  color: #94a3b8;
}

[data-theme="light"] .hero-search-suggestions .suggest-label {
  color: #64748b;
}

[data-theme="light"] .hero-search-suggestions a {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  color: #475569;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

[data-theme="light"] .hero-search-suggestions a:hover {
  background: rgba(2, 132, 199, 0.08);
  border-color: rgba(2, 132, 199, 0.3);
  color: #0284c7;
}

[data-theme="light"] .highlight-chip {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  color: #334155;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .highlight-chip:hover {
  background: rgba(2, 132, 199, 0.06);
  border-color: rgba(2, 132, 199, 0.25);
  color: #0284c7;
}

[data-theme="light"] .category-filter-pills .pill-item {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  color: #475569;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .category-filter-pills .pill-item:hover,
[data-theme="light"] .category-filter-pills .pill-item.active {
  background: #0284c7;
  color: #ffffff;
  border-color: #0284c7;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.25);
}

/* 3. Post Feed & Stream Cards Harmony */
[data-theme="light"] .post-row-card {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .post-row-card:hover {
  background: #ffffff;
  border-color: rgba(2, 132, 199, 0.35);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.07);
}

[data-theme="light"] .post-row-title a {
  color: #0f172a;
}

[data-theme="light"] .post-row-title a:hover {
  color: #0284c7;
}

[data-theme="light"] .post-row-meta {
  color: #64748b;
}

[data-theme="light"] .post-row-readmore {
  background: rgba(2, 132, 199, 0.07);
  border: 1px solid rgba(2, 132, 199, 0.2);
  color: #0284c7;
}

[data-theme="light"] .post-row-readmore:hover {
  background: #0284c7;
  color: #ffffff;
  border-color: #0284c7;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
}

[data-theme="light"] .btn-refresh-stream {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  color: #475569;
}

[data-theme="light"] .btn-refresh-stream:hover {
  background: rgba(2, 132, 199, 0.08);
  border-color: rgba(2, 132, 199, 0.25);
  color: #0284c7;
}

/* 4. Sidebar Widgets Harmony */
[data-theme="light"] .sidebar-widget {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .widget-title {
  color: #0f172a;
  border-bottom-color: rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .sidebar-search-wrap {
  background: #f8fafc;
  border: 1.5px solid rgba(0, 0, 0, 0.09);
}

[data-theme="light"] .sidebar-search-input {
  color: #0f172a;
}

[data-theme="light"] .category-sidebar-item a {
  background: #f8fafc;
  border: 1px solid rgba(0, 0, 0, 0.06);
  color: #334155;
}

[data-theme="light"] .category-sidebar-item a:hover {
  background: rgba(2, 132, 199, 0.07);
  border-color: rgba(2, 132, 199, 0.25);
  color: #0284c7;
}

[data-theme="light"] .category-count-badge {
  background: rgba(0, 0, 0, 0.06);
  color: #64748b;
}

[data-theme="light"] .widget-recent-post-item a {
  color: #0f172a;
}

[data-theme="light"] .widget-recent-post-item a:hover {
  color: #0284c7;
}

[data-theme="light"] .widget-recent-post-item .post-date {
  color: #64748b;
}

[data-theme="light"] .tech-tag-pill {
  background: #f8fafc;
  border: 1px solid rgba(0, 0, 0, 0.07);
  color: #475569;
}

[data-theme="light"] .tech-tag-pill:hover {
  background: #0284c7;
  color: #ffffff;
  border-color: #0284c7;
}

/* 5. Quick Search Modal Harmony */
[data-theme="light"] .header-search-dialog {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .header-search-bar {
  background: #f8fafc;
  border: 1px solid rgba(0, 0, 0, 0.09);
}

[data-theme="light"] .header-search-input {
  color: #0f172a;
}

[data-theme="light"] .header-search-tags .search-tag-link {
  background: #f1f5f9;
  border-color: rgba(0, 0, 0, 0.07);
  color: #334155;
}

[data-theme="light"] .header-search-tags .search-tag-link:hover {
  background: rgba(2, 132, 199, 0.08);
  border-color: rgba(2, 132, 199, 0.3);
  color: #0284c7;
}

/* 6. Pagination & Navigation Numbers */
[data-theme="light"] .pagination-nav .page-numbers {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  color: #334155;
}

[data-theme="light"] .pagination-nav .page-numbers.current {
  background: #0284c7;
  color: #ffffff;
  border-color: #0284c7;
}

/* 7. Footer & Back-to-Top */
[data-theme="light"] .site-footer {
  background: #ffffff;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .footer-copyright {
  color: #64748b;
}

[data-theme="light"] .footer-copyright strong {
  color: #0f172a;
}

[data-theme="light"] .footer-nav-menu .footer-links-list a {
  color: #64748b;
}

[data-theme="light"] .footer-nav-menu .footer-links-list a:hover {
  color: #0284c7;
}

[data-theme="light"] .back-to-top-btn {
  background: #ffffff;
  color: #0f172a;
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .back-to-top-btn:hover {
  background: #0284c7;
  color: #ffffff;
  border-color: #0284c7;
}

/* 8. Mermaid Diagrams Vector Contrast in Light Mode */
[data-theme="light"] .mermaid {
  background: #ffffff !important;
  border: 1px solid rgba(0, 0, 0, 0.09) !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04) !important;
}

[data-theme="light"] .mermaid text {
  fill: #0f172a !important;
}

[data-theme="light"] .mermaid .messageText {
  fill: #0f172a !important;
  stroke: none !important;
}

[data-theme="light"] .mermaid .actor {
  stroke: #0284c7 !important;
  fill: #f0f9ff !important;
}

[data-theme="light"] .mermaid text.actor > tspan {
  fill: #0f172a !important;
  font-weight: 700 !important;
}

[data-theme="light"] .mermaid line {
  stroke: #64748b !important;
}

[data-theme="light"] .mermaid .labelBox {
  stroke: #cbd5e1 !important;
  fill: #ffffff !important;
}

[data-theme="light"] .mermaid .labelText {
  fill: #0f172a !important;
}

[data-theme="light"] .mermaid .loopText {
  fill: #0f172a !important;
}

[data-theme="light"] .mermaid .note {
  stroke: #f59e0b !important;
  fill: #fef3c7 !important;
}

[data-theme="light"] .mermaid .noteText {
  fill: #78350f !important;
}