/* ==========================================================================
   CloudKnowledge Modern v2.1 - Ultra-Attractive Developer Platform
   Features: Glassmorphism, Floating Orbs, Keyframe Animations,
   Interactive Cards, Topic Matrix, Pro Typography.
   Author: Shivam Tiwari (CloudKnowledge.in)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & Themes
   -------------------------------------------------------------------------- */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Dark Theme (Default) */
  --bg-primary: #080c14;
  --bg-surface: #0f172a;
  --bg-surface-elevated: #1e293b;
  --bg-surface-hover: #243247;
  --bg-glass: rgba(15, 23, 42, 0.75);
  --border-color: #1e293b;
  --border-light: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(56, 189, 248, 0.35);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --brand-azure: #0ea5e9;
  --brand-entra: #6366f1;
  --brand-purple: #8b5cf6;
  --brand-aws: #f59e0b;
  --brand-linux: #10b981;
  --brand-red: #ef4444;
  --brand-cyan: #06b6d4;

  --brand-gradient: linear-gradient(135deg, #38bdf8 0%, #6366f1 50%, #a855f7 100%);
  --azure-gradient: linear-gradient(135deg, #0ea5e9 0%, #3b82f6 100%);
  --glow-radial: radial-gradient(circle, rgba(56, 189, 248, 0.15) 0%, rgba(99, 102, 241, 0.05) 50%, transparent 70%);

  --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --card-shadow-hover: 0 20px 40px -12px rgba(56, 189, 248, 0.25);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --header-height: 70px;
  --container-max: 1240px;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-surface-hover: #e2e8f0;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --border-color: #e2e8f0;
  --border-light: rgba(0, 0, 0, 0.06);
  --border-glow: rgba(14, 165, 233, 0.35);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.06);
  --card-shadow-hover: 0 20px 40px -12px rgba(14, 165, 233, 0.18);
}

/* --------------------------------------------------------------------------
   2. Reset & Typography
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--brand-azure);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: var(--brand-entra);
}

.ck-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* --------------------------------------------------------------------------
   3. Keyframe Animations
   -------------------------------------------------------------------------- */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.05); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   4. Reading Progress Bar
   -------------------------------------------------------------------------- */
#reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--brand-gradient);
  z-index: 99999;
  transition: width 0.1s ease;
}

/* --------------------------------------------------------------------------
   5. Sticky Header & Clean Navigation
   -------------------------------------------------------------------------- */
.ck-header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: background 0.3s ease;
}

.ck-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 16px;
}

.ck-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
  white-space: nowrap;
  letter-spacing: -0.02em;
}

.ck-logo-wrap {
  display: flex;
  align-items: center;
}

.custom-logo-link {
  display: flex;
  align-items: center;
}

.custom-logo {
  max-height: 44px;
  width: auto;
  object-fit: contain;
}

.ck-logo-badge {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.4);
  animation: float 4s ease-in-out infinite;
}

.ck-logo span {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.ck-nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.ck-nav-menu li {
  position: relative;
  list-style: none;
}

.ck-nav-menu li a,
.ck-nav-item a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  transition: all 0.2s ease;
  display: block;
  text-decoration: none;
}

.ck-nav-menu li a:hover,
.ck-nav-menu li.current-menu-item > a,
.ck-nav-menu li.current_page_item > a,
.ck-nav-item a:hover,
.ck-nav-item.active a {
  color: var(--text-primary);
  background: var(--bg-surface-elevated);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Multi-level Dropdown Support for WordPress Menus */
.ck-nav-menu .sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px;
  box-shadow: var(--card-shadow);
  list-style: none;
  display: none;
  flex-direction: column;
  gap: 4px;
  z-index: 1050;
  backdrop-filter: blur(12px);
  margin-top: 6px;
}

.ck-nav-menu li:hover > .sub-menu,
.ck-nav-menu li:focus-within > .sub-menu {
  display: flex;
}

.ck-nav-menu .sub-menu li a {
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.85rem;
}

.ck-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.ck-search-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 7px 12px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s ease;
}

.ck-search-trigger:hover {
  border-color: var(--brand-azure);
  color: var(--text-secondary);
  box-shadow: 0 0 12px rgba(14, 165, 233, 0.25);
}

.ck-search-kbd {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 2px 6px;
  border-radius: 4px;
}

.ck-theme-toggle {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.ck-theme-toggle:hover {
  transform: rotate(15deg);
  border-color: var(--brand-azure);
}

.ck-btn-youtube {
  display: flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%);
  color: #fff !important;
  font-size: 0.825rem;
  font-weight: 700;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.35);
  transition: all 0.2s ease;
}

.ck-btn-youtube:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.5);
}

.ck-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   6. Animated Hero Section
   -------------------------------------------------------------------------- */
.ck-hero {
  position: relative;
  padding: 80px 0 60px;
  text-align: center;
  overflow: hidden;
}

.ck-hero-glow-1 {
  position: absolute;
  top: -100px;
  left: 30%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.2) 0%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  animation: pulse-glow 8s ease-in-out infinite;
}

.ck-hero-glow-2 {
  position: absolute;
  top: 50px;
  right: 25%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.18) 0%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  animation: pulse-glow 10s ease-in-out infinite alternate;
}

.ck-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-glow);
  color: var(--brand-azure);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  box-shadow: 0 0 20px rgba(14, 165, 233, 0.15);
  animation: fadeInUp 0.6s ease-out;
}

.ck-hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.035em;
  max-width: 900px;
  margin: 0 auto 20px;
  animation: fadeInUp 0.7s ease-out;
}

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

.ck-hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 36px;
  line-height: 1.65;
  animation: fadeInUp 0.8s ease-out;
}

/* Stats Counter Bar */
.ck-stats-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 40px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 20px 36px;
  border-radius: var(--radius-lg);
  max-width: 840px;
  margin: 0 auto 40px;
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(10px);
  animation: fadeInUp 0.9s ease-out;
}

.ck-stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.ck-stat-num {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--brand-azure);
  letter-spacing: -0.02em;
}

.ck-stat-label {
  font-size: 0.775rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   7. Interactive Topic Matrix Cards (Category Showcase)
   -------------------------------------------------------------------------- */
.ck-topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 60px;
}

.ck-topic-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.ck-topic-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--border-color);
  transition: background 0.3s ease;
}

.ck-topic-card:hover {
  transform: translateY(-6px);
  border-color: var(--brand-azure);
  box-shadow: var(--card-shadow-hover);
}

.ck-topic-card.azure:hover::before { background: var(--azure-gradient); }
.ck-topic-card.entra:hover::before { background: linear-gradient(135deg, #6366f1, #a855f7); }
.ck-topic-card.aws:hover::before { background: linear-gradient(135deg, #f59e0b, #ea580c); }
.ck-topic-card.linux:hover::before { background: linear-gradient(135deg, #10b981, #059669); }
.ck-topic-card.powershell:hover::before { background: linear-gradient(135deg, #0ea5e9, #6366f1); }
.ck-topic-card.interview:hover::before { background: linear-gradient(135deg, #ec4899, #8b5cf6); }

.ck-topic-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.ck-topic-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.ck-topic-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
  flex-grow: 1;
}

.ck-topic-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--brand-azure);
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

/* --------------------------------------------------------------------------
   8. Articles Showcase Grid
   -------------------------------------------------------------------------- */
.ck-section-title-wrap {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 30px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.ck-section-h2 {
  font-size: 1.75rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.ck-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 28px;
  margin-bottom: 60px;
}

.ck-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--card-shadow);
  transition: all 0.3s ease;
}

.ck-card:hover {
  transform: translateY(-6px);
  border-color: var(--brand-azure);
  box-shadow: var(--card-shadow-hover);
}

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

.ck-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.ck-card:hover .ck-card-thumb img {
  transform: scale(1.06);
}

.ck-card-category {
  position: absolute;
  top: 14px;
  left: 14px;
  font-size: 0.725rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(8, 12, 20, 0.85);
  color: var(--brand-azure);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.ck-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.ck-card-title a {
  color: inherit;
}

.ck-card-title a:hover {
  color: var(--brand-azure);
}

.ck-card-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 20px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.ck-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   9. Clean Category / Archive Hero Banner (Fixing Wall of Text)
   -------------------------------------------------------------------------- */
.ck-archive-banner {
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-primary) 100%);
  border-bottom: 1px solid var(--border-color);
  padding: 50px 0 40px;
  margin-bottom: 40px;
  position: relative;
}

.ck-archive-header-box {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.ck-archive-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--brand-azure);
  font-size: 0.775rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.ck-archive-title {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.ck-archive-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.65;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  text-align: left;
  box-shadow: var(--card-shadow);
}

.ck-archive-desc ul {
  padding-left: 20px;
  margin-top: 10px;
}

.ck-archive-desc li {
  margin-bottom: 6px;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   10. Pro Code Blocks with Copy Button
   -------------------------------------------------------------------------- */
pre, .wp-block-code {
  position: relative;
  background: #0b1120 !important;
  border: 1px solid #1e293b;
  border-radius: var(--radius-md);
  margin: 24px 0;
  padding: 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  color: #e2e8f0;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-surface-elevated);
  color: var(--brand-azure);
  padding: 2px 6px;
  border-radius: 4px;
}

pre code {
  background: transparent !important;
  color: inherit !important;
  padding: 0 !important;
}

.ck-code-copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #e2e8f0;
  font-size: 0.75rem;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all 0.2s ease;
}

.ck-code-copy-btn:hover {
  background: var(--brand-azure);
  color: #fff;
  border-color: var(--brand-azure);
}

/* --------------------------------------------------------------------------
   11. Callouts & Single Article View
   -------------------------------------------------------------------------- */
.ck-article-wrapper {
  padding: 40px 0 80px;
}

.ck-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.ck-article-title {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin: 14px 0 18px;
}

.ck-article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.ck-reading-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 48px;
  align-items: start;
}

.ck-content {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.ck-content h2 {
  font-size: 1.65rem;
  font-weight: 800;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.ck-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 30px 0 12px;
}

.ck-content p {
  margin-bottom: 20px;
  color: var(--text-secondary);
}

.ck-alert {
  padding: 18px 22px;
  margin: 28px 0;
  border-radius: var(--radius-md);
  border-left: 4px solid;
  background: var(--bg-surface-elevated);
}

.ck-alert-tip { border-left-color: var(--brand-linux); background: rgba(16, 185, 129, 0.08); }
.ck-alert-warning { border-left-color: var(--brand-aws); background: rgba(245, 158, 11, 0.08); }
.ck-alert-note { border-left-color: var(--brand-azure); background: rgba(14, 165, 233, 0.08); }

.ck-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.ck-toc-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--card-shadow);
}

.ck-toc-title {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.ck-toc-list {
  list-style: none;
  font-size: 0.875rem;
}

.ck-toc-list li { margin-bottom: 6px; }

.ck-toc-list a {
  color: var(--text-secondary);
  display: block;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
}

.ck-toc-list a.active {
  color: var(--brand-azure);
  background: var(--bg-surface-elevated);
  border-left-color: var(--brand-azure);
  font-weight: 700;
}

.ck-author-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  box-shadow: var(--card-shadow);
}

.ck-author-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  margin: 0 auto 12px;
  border: 2px solid var(--brand-azure);
  box-shadow: 0 0 16px rgba(14, 165, 233, 0.3);
}

/* --------------------------------------------------------------------------
   12. Search Modal (Ctrl + K)
   -------------------------------------------------------------------------- */
.ck-search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  z-index: 999999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
}

.ck-search-overlay.open {
  opacity: 1;
  visibility: visible;
}

.ck-search-dialog {
  width: 90%;
  max-width: 620px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  overflow: hidden;
}

.ck-search-input-wrap {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
}

.ck-search-input {
  width: 100%;
  background: transparent;
  border: none;
  font-size: 1.1rem;
  color: var(--text-primary);
  outline: none;
}

.ck-search-results {
  max-height: 380px;
  overflow-y: auto;
  padding: 12px;
}

.ck-search-hit {
  display: block;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

.ck-search-hit:hover {
  background: var(--bg-surface-elevated);
}

/* --------------------------------------------------------------------------
   13. Footer
   -------------------------------------------------------------------------- */
.ck-footer {
  margin-top: auto;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
}

.ck-footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 36px;
  margin-bottom: 40px;
}

.ck-footer-col h4 {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.ck-footer-links {
  list-style: none;
  font-size: 0.875rem;
}

.ck-footer-links li { margin-bottom: 10px; }
.ck-footer-links a { color: var(--text-secondary); }
.ck-footer-links a:hover { color: var(--brand-azure); }

.ck-footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   14. Mobile Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .ck-reading-grid { grid-template-columns: 1fr; }
  .ck-sidebar { position: static; }
  .ck-hero-title { font-size: 2.5rem; }
  .ck-footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .ck-nav-menu {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 16px 24px;
    gap: 8px;
    box-shadow: var(--card-shadow);
  }
  .ck-nav-menu.ck-mobile-open {
    display: flex;
  }
  .ck-nav-menu li {
    width: 100%;
  }
  .ck-nav-menu li a {
    width: 100%;
    padding: 10px 16px;
  }
  .ck-nav-menu .sub-menu {
    position: static;
    display: flex;
    background: var(--bg-surface-elevated);
    box-shadow: none;
    margin-left: 12px;
    margin-top: 4px;
  }
  .ck-search-kbd { display: none; }
  .ck-mobile-toggle { display: block; }
  .ck-hero-title { font-size: 2rem; }
  .ck-stats-bar { gap: 20px; padding: 16px; }
  .ck-grid { grid-template-columns: 1fr; }
  .ck-footer-grid { grid-template-columns: 1fr; }
}