/* main.css - Core Design System and Stylesheet */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800;900&display=swap');

/* Theme Token Definitions */
:root {
  /* Light Theme Variables (Default) */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;
  
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-rgb: 37, 99, 235;
  --accent: #7c3aed;
  --accent-rgb: 124, 58, 237;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  --primary-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  --success-gradient: linear-gradient(135deg, #059669 0%, #10b981 100%);
  
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --card-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --glow-opacity: 0.15;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --header-height: 72px;
}

[data-theme="dark"] {
  /* Dark Theme Variables */
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  
  --text-primary: #f9fafb;
  --text-secondary: #e5e7eb;
  --text-muted: #9ca3af;
  
  --border-color: #1f2937;
  --border-hover: #374151;
  
  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-rgb: 59, 130, 246;
  --accent: #8b5cf6;
  --accent-rgb: 139, 92, 246;
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  
  --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  --success-gradient: linear-gradient(135deg, #10b981 0%, #34d399 100%);
  
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --card-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
  --glow-opacity: 0.35;
}

/* Modern CSS Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

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

ul, ol {
  list-style: none;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.section-padding {
  padding-top: 80px;
  padding-bottom: 80px;
}

@media (max-width: 768px) {
  .section-padding {
    padding-top: 50px;
    padding-bottom: 50px;
  }
}

/* Typography Rules */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.2;
}

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

/* Decorative Background Glows */
.bg-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  z-index: -1;
  opacity: var(--glow-opacity);
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.glow-primary {
  background: radial-gradient(circle, rgba(var(--primary-rgb), 0.6) 0%, transparent 70%);
  top: -150px;
  right: -50px;
}

.glow-accent {
  background: radial-gradient(circle, rgba(var(--accent-rgb), 0.5) 0%, transparent 70%);
  top: 300px;
  left: -200px;
}

/* Header & Navigation Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(var(--bg-secondary) == #ffffff ? 255, 255, 255 : 17, 24, 39, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

/* Custom RGB-aware transparency logic workaround */
.header {
  background-color: rgba(255, 255, 255, 0.75);
}
[data-theme="dark"] .header {
  background-color: rgba(17, 24, 39, 0.75);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 0;
}

.nav-link:hover {
  color: var(--primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Theme Toggle Button */
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--border-hover);
  background-color: var(--bg-secondary);
  transform: translateY(-2px);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.theme-toggle .sun-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .moon-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
  display: block;
}

/* CTA Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.btn-primary:hover {
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

/* Hamburger mobile menu button */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  cursor: pointer;
  z-index: 1100;
}

.hamburger span {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* Mobile responsive navigation styles */
@media (max-width: 991px) {
  .hamburger {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background-color: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    flex-direction: column;
    align-items: flex-start;
    padding: calc(var(--header-height) + 40px) 40px 40px;
    gap: 24px;
    z-index: 999;
    transition: right var(--transition-normal);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  
  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

/* Hero Section Styles */
.hero {
  position: relative;
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 80px;
  text-align: center;
  overflow: hidden;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background-color: rgba(var(--primary-rgb), 0.1);
  color: var(--primary);
  margin-bottom: 24px;
  border: 1px solid rgba(var(--primary-rgb), 0.15);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  line-height: 1.15;
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.25rem;
  }
}

.hero-desc {
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 40px;
}

.hero-search-wrapper {
  max-width: 580px;
  margin: 0 auto 48px;
  position: relative;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 8px 8px 8px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-fast);
}

.hero-search-wrapper:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.15), var(--card-shadow-hover);
}

.hero-search-wrapper svg {
  color: var(--text-muted);
  flex-shrink: 0;
}

.hero-search-input {
  flex-grow: 1;
  font-weight: 500;
  color: var(--text-primary);
  width: 100%;
}

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

.hero-stats {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 48px;
  margin-top: 48px;
}

@media (max-width: 480px) {
  .hero-stats {
    gap: 24px;
  }
}

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

.stat-num {
  font-family: 'Outfit', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Bento Grid System Section */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.bento-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.bento-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--card-shadow-hover);
}

.bento-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.bento-card:hover::before {
  opacity: 1;
}

/* Bento Sizing Combinations */
.col-12 { grid-column: span 12; }
.col-8 { grid-column: span 8; }
.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }

@media (max-width: 991px) {
  .col-8, .col-6, .col-4 {
    grid-column: span 12;
  }
}

.bento-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background-color: var(--bg-tertiary);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: all var(--transition-fast);
}

.bento-card:hover .bento-icon {
  background: var(--primary-gradient);
  color: #ffffff;
  transform: scale(1.1);
}

.bento-icon svg {
  width: 24px;
  height: 24px;
}

.bento-title {
  font-size: 1.35rem;
  margin-bottom: 12px;
}

.bento-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-grow: 1;
}

.bento-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--primary);
  margin-top: auto;
}

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

.bento-card:hover .bento-link svg {
  transform: translateX(4px);
}

/* Specific Bento Cards layout additions */
.bento-glow-spot {
  position: absolute;
  top: -10%;
  right: -10%;
  width: 150px;
  height: 150px;
  background: var(--primary-gradient);
  filter: blur(40px);
  opacity: 0.1;
  border-radius: 50%;
  pointer-events: none;
}

.clients-mini-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  width: 100%;
}

@media (max-width: 480px) {
  .clients-mini-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.mini-client-card {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  transition: all var(--transition-fast);
}

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

.mini-client-card svg {
  width: 20px;
  height: 20px;
  color: var(--text-secondary);
}

.mini-client-card:hover svg {
  color: var(--primary);
}

.mini-client-name {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* VPN / Airport Comparison Table (Premium style) */
.section-header {
  margin-bottom: 48px;
  text-align: left;
}

.section-tag {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--primary);
  display: block;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
}

.table-filter-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.filter-btn-group {
  display: flex;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 4px;
  border-radius: var(--radius-md);
  gap: 4px;
}

.filter-tab {
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tab:hover {
  color: var(--text-primary);
}

.filter-tab.active {
  background-color: var(--bg-tertiary);
  color: var(--primary);
}

.sort-select-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sort-select-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
}

.sort-select {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 8px 32px 8px 16px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b' stroke-width='2.5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
}

.sort-select:hover {
  border-color: var(--border-hover);
}

/* Grid layout for comparison items to look premium and different than normal tabular data */
.comp-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.comp-item {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: grid;
  grid-template-columns: 2.5fr 1.5fr 1.5fr 1.5fr 1.5fr 2fr;
  align-items: center;
  gap: 20px;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-fast);
}

.comp-item:hover {
  border-color: var(--primary);
  box-shadow: var(--card-shadow-hover);
  transform: scale(1.005);
}

@media (max-width: 991px) {
  .comp-item {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
}

@media (max-width: 576px) {
  .comp-item {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 20px;
  }
}

/* Item details inside comparison deck */
.comp-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.comp-badge {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-gradient);
  color: #ffffff;
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.comp-brand-info {
  display: flex;
  flex-direction: column;
}

.comp-name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.comp-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.comp-tag {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background-color: var(--bg-tertiary);
  color: var(--text-muted);
}

.comp-tag-featured {
  background-color: rgba(var(--primary-rgb), 0.1);
  color: var(--primary);
}

.comp-meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

@media (max-width: 991px) {
  .comp-meta-item {
    background-color: var(--bg-tertiary);
    padding: 12px;
    border-radius: var(--radius-md);
  }
}

.comp-meta-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
}

.comp-meta-val {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.comp-rating-wrapper {
  display: flex;
  align-items: center;
  gap: 6px;
}

.comp-stars {
  color: var(--warning);
  display: flex;
  gap: 2px;
}

.comp-stars svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.comp-score {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-primary);
}

.comp-speed-meter {
  width: 100%;
  height: 6px;
  background-color: var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: 4px;
}

.comp-speed-fill {
  height: 100%;
  background: var(--primary-gradient);
  border-radius: var(--radius-full);
}

.comp-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: stretch;
}

@media (max-width: 991px) {
  .comp-actions {
    grid-column: span 3;
    flex-direction: row;
  }
}

@media (max-width: 576px) {
  .comp-actions {
    grid-column: span 1;
    flex-direction: column;
  }
}

.pulse-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
  animation: pulse-green 2s infinite;
  margin-right: 6px;
}

@keyframes pulse-green {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    transform: scale(1);
    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);
  }
}

/* Wiki Grid Styles */
.wiki-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 991px) {
  .wiki-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .wiki-grid {
    grid-template-columns: 1fr;
  }
}

.wiki-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.wiki-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--card-shadow-hover);
}

.wiki-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.wiki-title {
  font-size: 1.15rem;
  margin-bottom: 12px;
  line-height: 1.4;
}

.wiki-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 20px;
  flex-grow: 1;
}

.wiki-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  margin-top: auto;
}

/* FAQ / Accordion Section Styles */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--border-hover);
}

.faq-header {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.faq-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.faq-icon-wrapper {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.faq-icon-wrapper svg {
  width: 18px;
  height: 18px;
}

.faq-content {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal) ease-out, padding var(--transition-normal) ease-out;
  color: var(--text-secondary);
  font-size: 0.95rem;
  border-top: 0px solid transparent;
}

.faq-item.active {
  border-color: var(--primary);
}

.faq-item.active .faq-icon-wrapper {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-item.active .faq-content {
  padding-bottom: 24px;
  border-top-color: var(--border-color);
}

/* Detailed Article Detail Page Styles */
.article-container {
  display: grid;
  grid-template-columns: 8fr 4fr;
  gap: 40px;
  margin-top: 40px;
}

@media (max-width: 991px) {
  .article-container {
    grid-template-columns: 1fr;
  }
}

.article-main {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--card-shadow);
}

@media (max-width: 768px) {
  .article-main {
    padding: 24px;
  }
}

.article-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 32px;
  margin-bottom: 32px;
}

.article-category {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: block;
}

.article-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.25;
}

.article-meta-info {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.article-author {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--text-primary);
}

.article-author-img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}

/* Rich Typography inside Articles */
.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: 1.75rem;
  margin-top: 40px;
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-color);
}

.article-body h3 {
  font-size: 1.35rem;
  margin-top: 32px;
  margin-bottom: 16px;
}

.article-body p {
  margin-bottom: 24px;
}

.article-body strong {
  color: var(--text-primary);
}

.article-body code {
  font-family: Consolas, Monaco, 'Andale Mono', monospace;
  background-color: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  color: var(--accent);
}

.article-body pre {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: 24px;
}

.article-body pre code {
  background-color: transparent;
  padding: 0;
  border-radius: 0;
  color: var(--text-primary);
}

.article-body ul {
  list-style: disc;
  margin-left: 24px;
  margin-bottom: 24px;
}

.article-body ul li {
  margin-bottom: 8px;
}

/* Callout Box styling inside articles */
.callout {
  background-color: var(--bg-tertiary);
  border-left: 4px solid var(--primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: 28px;
}

.callout-title {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.callout-warning {
  border-left-color: var(--danger);
  background-color: rgba(239, 68, 68, 0.05);
}

.callout-warning .callout-title {
  color: var(--danger);
}

.callout-tip {
  border-left-color: var(--success);
  background-color: rgba(16, 185, 129, 0.05);
}

.callout-tip .callout-title {
  color: var(--success);
}

/* Article Page Sidebar with Table of Contents */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.sidebar-widget {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--card-shadow);
}

.sidebar-widget-sticky {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.widget-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toc-item a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  display: block;
  border-left: 2px solid transparent;
  padding-left: 12px;
}

.toc-item a:hover {
  color: var(--primary);
  border-left-color: var(--border-hover);
}

.toc-item.active a {
  color: var(--primary);
  font-weight: 700;
  border-left-color: var(--primary);
}

.toc-h3 {
  padding-left: 12px;
}

/* Reading Progress Bar */
.progress-bar-container {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: 3px;
  background-color: transparent;
  z-index: 1001;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--primary-gradient);
  transition: width 0.1s ease-out;
}

/* Footer Section */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding-top: 60px;
  padding-bottom: 40px;
  color: var(--text-secondary);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}

@media (max-width: 991px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.footer-col-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-link:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-socials {
  display: flex;
  gap: 16px;
}

.footer-social-link {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.footer-social-link:hover {
  background-color: var(--primary);
  color: #ffffff;
  transform: translateY(-2px);
}

.footer-social-link svg {
  width: 16px;
  height: 16px;
}

/* Tag filter button styling */
.tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.tag-btn {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tag-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.tag-btn.active {
  background: var(--primary-gradient);
  border-color: transparent;
  color: #ffffff;
}