/* ==========================================================================
   AuraBlue Theme - Modern CSS Design System
   Palette: #E3F2FD (Light Tint) | #90CAF9 (Soft Blue) | #2196F3 (Vibrant Blue) | #0D47A1 (Deep Navy)
   ========================================================================== */

:root {
  /* Primary Theme Palette */
  --color-tint: #E3F2FD;
  --color-soft-blue: #90CAF9;
  --color-vibrant-blue: #2196F3;
  --color-navy: #0D47A1;
  --color-navy-dark: #0A3678;
  --color-navy-light: #1565C0;
  
  /* Text & Surfaces */
  --color-bg: #FFFFFF;
  --color-surface: #F8FAFC;
  --color-surface-tint: #E3F2FD;
  --color-text-primary: #0F172A;
  --color-text-navy: #0D47A1;
  --color-text-muted: #64748B;
  --color-border: #E2E8F0;
  --color-border-accent: #90CAF9;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #0D47A1 0%, #1565C0 50%, #2196F3 100%);
  --gradient-accent: linear-gradient(135deg, #2196F3 0%, #90CAF9 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(227, 242, 253, 0.4));
  --gradient-surface: linear-gradient(180deg, #E3F2FD 0%, #FFFFFF 100%);

  /* Typography */
  --font-heading: 'Poppins', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;

  /* Shadow Elevation */
  --shadow-sm: 0 2px 8px rgba(13, 71, 161, 0.05);
  --shadow-md: 0 4px 20px rgba(13, 71, 161, 0.08);
  --shadow-lg: 0 12px 32px rgba(13, 71, 161, 0.12);
  --shadow-glow: 0 0 25px rgba(33, 150, 243, 0.3);

  /* Borders & Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 9999px;

  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease-in-out;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: var(--color-vibrant-blue);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--color-navy);
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-navy);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-narrow {
  max-width: 860px;
}

.section-padding {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.bg-surface-tint {
  background: var(--gradient-surface);
}

.bg-navy {
  background: var(--color-navy);
  color: #FFFFFF;
}

.bg-navy h1, .bg-navy h2, .bg-navy h3, .bg-navy h4 {
  color: #FFFFFF;
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem auto;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background-color: var(--color-tint);
  color: var(--color-navy);
  border: 1px solid var(--color-soft-blue);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 2.25rem;
  color: var(--color-navy);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Buttons & Micro-interactions
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.85rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  line-height: 1;
}

.btn-primary {
  background-color: var(--color-vibrant-blue);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(33, 150, 243, 0.4);
}

.btn-primary:hover {
  background-color: var(--color-navy);
  color: #FFFFFF;
  box-shadow: 0 6px 20px rgba(13, 71, 161, 0.4);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: var(--color-tint);
  color: var(--color-navy);
  border-color: var(--color-soft-blue);
}

.btn-secondary:hover {
  background-color: var(--color-vibrant-blue);
  color: #FFFFFF;
  border-color: var(--color-vibrant-blue);
  transform: translateY(-2px);
}

.btn-outline-white {
  background-color: transparent;
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline-white:hover {
  background-color: #FFFFFF;
  color: var(--color-navy);
  border-color: #FFFFFF;
  transform: translateY(-2px);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(144, 202, 249, 0.3);
  transition: var(--transition);
}

.site-header.is-scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

/* Site Branding Logo */
.site-branding {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-navy);
  letter-spacing: -0.02em;
  margin: 0;
}

.site-title a {
  color: var(--color-navy);
}

.site-title span {
  color: var(--color-vibrant-blue);
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--gradient-hero);
  color: #FFFFFF;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* Navigation Links */
.main-navigation ul {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.main-navigation a {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-primary);
  padding: 0.5rem 0;
  position: relative;
}

.main-navigation a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-vibrant-blue);
  transition: var(--transition);
}

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

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

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background-color: var(--color-tint);
  color: var(--color-navy);
  border: 1px solid var(--color-soft-blue);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: var(--transition);
}

.icon-btn:hover {
  background-color: var(--color-vibrant-blue);
  color: #FFFFFF;
  border-color: var(--color-vibrant-blue);
}

.mobile-menu-toggle {
  display: none;
}

/* ==========================================================================
   Hero Section (Front Page)
   ========================================================================== */
.hero-section {
  position: relative;
  background: var(--gradient-hero);
  color: #FFFFFF;
  padding-top: 6rem;
  padding-bottom: 7rem;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(144, 202, 249, 0.25) 0%, rgba(13, 71, 161, 0) 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content .badge-pill {
  background-color: rgba(227, 242, 253, 0.15);
  color: var(--color-tint);
  border-color: rgba(144, 202, 249, 0.4);
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

.hero-title span {
  color: var(--color-soft-blue);
}

.hero-description {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 2rem;
  max-width: 580px;
}

.hero-buttons {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Floating Hero Card Preview */
.hero-visual {
  position: relative;
}

.hero-card-preview {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
}

.preview-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.preview-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.preview-dot.red { background-color: #FF5F56; }
.preview-dot.yellow { background-color: #FFBD2E; }
.preview-dot.green { background-color: #27C93F; }

.floating-badge {
  position: absolute;
  bottom: -20px;
  left: -20px;
  background-color: #FFFFFF;
  color: var(--color-navy);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.85rem;
  border: 1px solid var(--color-soft-blue);
}

.floating-badge .icon-wrap {
  width: 44px;
  height: 44px;
  background-color: var(--color-tint);
  color: var(--color-vibrant-blue);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   Features Section Cards
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background-color: var(--color-bg);
  padding: 2.25rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

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

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-soft-blue);
  box-shadow: var(--shadow-lg);
}

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

.feature-icon {
  width: 54px;
  height: 54px;
  background-color: var(--color-tint);
  color: var(--color-vibrant-blue);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background-color: var(--color-vibrant-blue);
  color: #FFFFFF;
  transform: scale(1.08);
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.6rem;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ==========================================================================
   Interactive Showcase Tabs
   ========================================================================== */
.showcase-tabs-nav {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 0.75rem 1.5rem;
  background-color: var(--color-tint);
  color: var(--color-navy);
  border: 1px solid var(--color-soft-blue);
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn.active, .tab-btn:hover {
  background-color: var(--color-vibrant-blue);
  color: #FFFFFF;
  border-color: var(--color-vibrant-blue);
  box-shadow: 0 4px 12px rgba(33, 150, 243, 0.3);
}

.showcase-tab-content {
  display: none;
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-soft-blue);
}

.showcase-tab-content.active {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Stat Banner Section
   ========================================================================== */
.stats-banner {
  background: var(--gradient-hero);
  color: #FFFFFF;
  padding: 4rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-item .stat-number {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 0.25rem;
}

.stat-item .stat-number span {
  color: var(--color-soft-blue);
}

.stat-item .stat-label {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   Post Card Grid (Blog & Archives)
   ========================================================================== */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

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

.post-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-soft-blue);
}

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

.post-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.category-pill {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background-color: rgba(13, 71, 161, 0.9);
  backdrop-filter: blur(4px);
  color: #FFFFFF;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  z-index: 2;
}

.post-card-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.825rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.post-meta-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.post-card-title {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

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

.post-card-title a:hover {
  color: var(--color-vibrant-blue);
}

.post-card-excerpt {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

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

.read-more-link {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-vibrant-blue);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.read-more-link:hover {
  color: var(--color-navy);
  gap: 0.6rem;
}

/* ==========================================================================
   Single Post & Page Layout
   ========================================================================== */
.single-post-header {
  background: var(--gradient-surface);
  padding: 4rem 0 3rem 0;
  border-bottom: 1px solid var(--color-soft-blue);
  text-align: center;
}

.single-post-title {
  font-size: 2.75rem;
  max-width: 900px;
  margin: 1rem auto 1.5rem auto;
}

.single-post-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.single-featured-image {
  margin: -3rem auto 3rem auto;
  max-width: 1000px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.entry-content {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-text-primary);
}

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

.entry-content blockquote {
  border-left: 4px solid var(--color-vibrant-blue);
  padding: 1.25rem 1.75rem;
  background-color: var(--color-tint);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 2rem 0;
  font-style: italic;
  color: var(--color-navy);
  font-weight: 500;
}

/* Author Box */
.author-box {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background-color: var(--color-tint);
  border: 1px solid var(--color-soft-blue);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-top: 3.5rem;
}

.author-avatar img {
  border-radius: 50%;
}

.author-info h4 {
  margin-bottom: 0.35rem;
}

/* ==========================================================================
   Sidebar & Widgets
   ========================================================================== */
.sidebar-layout {
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  gap: 3rem;
}

.widget-card {
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 1.75rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.widget-title {
  font-size: 1.15rem;
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
  border-bottom: 2px solid var(--color-soft-blue);
}

.widget ul {
  list-style: none;
}

.widget ul li {
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--color-border);
}

.widget ul li:last-child {
  border-bottom: none;
}

/* Search Widget */
.search-form {
  display: flex;
  gap: 0.5rem;
}

.search-field {
  flex-grow: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}

.search-field:focus {
  border-color: var(--color-vibrant-blue);
  box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.2);
}

.search-submit {
  background-color: var(--color-vibrant-blue);
  color: #FFFFFF;
  border: none;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}

.search-submit:hover {
  background-color: var(--color-navy);
}

/* ==========================================================================
   Comments Section
   ========================================================================== */
.comments-area {
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid var(--color-border);
}

.comment-list {
  list-style: none;
  margin-bottom: 3rem;
}

.comment-body {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  border: 1px solid var(--color-border);
}

/* ==========================================================================
   Pagination & Breadcrumbs
   ========================================================================== */
.pagination-wrapper {
  margin-top: 3.5rem;
  display: flex;
  justify-content: center;
}

.pagination-list {
  display: flex;
  gap: 0.5rem;
  list-style: none;
}

.pagination-item a, .pagination-item span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 42px;
  padding: 0 0.85rem;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-navy);
  font-weight: 600;
}

.pagination-item.active span, .pagination-item a:hover {
  background-color: var(--color-vibrant-blue);
  color: #FFFFFF;
  border-color: var(--color-vibrant-blue);
}

/* Breadcrumbs */
.breadcrumbs-nav {
  margin-bottom: 1.5rem;
}

.breadcrumbs-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.breadcrumb-item::after {
  content: '/';
  margin-left: 0.5rem;
  color: var(--color-border-accent);
}

.breadcrumb-item:last-child::after {
  content: '';
}

.breadcrumb-item.active {
  color: var(--color-navy);
  font-weight: 600;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--color-navy-dark);
  color: rgba(255, 255, 255, 0.85);
  padding-top: 5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2.5rem;
  margin-bottom: 4rem;
}

.footer-widget-title {
  color: #FFFFFF;
  font-size: 1.15rem;
  margin-bottom: 1.25rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-widget-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 36px;
  height: 3px;
  background-color: var(--color-vibrant-blue);
  border-radius: 2px;
}

.footer-widget ul {
  list-style: none;
}

.footer-widget ul li {
  margin-bottom: 0.6rem;
}

.footer-widget ul a {
  color: rgba(255, 255, 255, 0.75);
}

.footer-widget ul a:hover {
  color: var(--color-soft-blue);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.75rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9rem;
}

.back-to-top-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 99;
  width: 48px;
  height: 48px;
  background-color: var(--color-vibrant-blue);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  border: none;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.back-to-top-btn.is-visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top-btn:hover {
  background-color: var(--color-navy);
  transform: translateY(-4px);
}

/* Modal Search Overlay */
.search-modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(10, 25, 47, 0.85);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

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

.search-modal-container {
  width: 90%;
  max-width: 680px;
  background: #FFFFFF;
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.search-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Featured News & Trending News Layouts
   ========================================================================== */
.featured-news-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

.featured-main-card {
  position: relative;
  background: var(--gradient-hero);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  color: #FFFFFF;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 420px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--color-soft-blue);
  transition: var(--transition);
}

.featured-main-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.featured-main-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13, 71, 161, 0.1) 0%, rgba(13, 71, 161, 0.92) 100%);
  z-index: 1;
}

.featured-main-content {
  position: relative;
  z-index: 2;
}

.featured-main-card h3 {
  font-size: 1.85rem;
  color: #FFFFFF;
  line-height: 1.3;
  margin-bottom: 1rem;
}

.featured-side-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.featured-side-item {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem;
  display: flex;
  gap: 1.25rem;
  align-items: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.featured-side-item:hover {
  border-color: var(--color-soft-blue);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.featured-side-num {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-soft-blue);
  line-height: 1;
  min-width: 36px;
}

.featured-side-info h4 {
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
  line-height: 1.35;
}

.featured-side-info h4 a {
  color: var(--color-navy);
}

.featured-side-info h4 a:hover {
  color: var(--color-vibrant-blue);
}

/* Trending Hot Topics Cards */
.trending-news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.trending-card {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.trending-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-soft-blue);
  box-shadow: var(--shadow-md);
}

.flame-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background-color: #FFF3E0;
  color: #E65100;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.trending-rank {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 900;
  color: var(--color-soft-blue);
  opacity: 0.5;
  position: absolute;
  top: 1rem;
  right: 1.25rem;
}

/* News Filter Navigation */
.news-filter-bar {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.news-filter-btn {
  padding: 0.5rem 1.25rem;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.news-filter-btn.active, .news-filter-btn:hover {
  background-color: var(--color-navy);
  color: #FFFFFF;
  border-color: var(--color-navy);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .featured-news-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .sidebar-layout {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .showcase-tab-content.active {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .main-navigation {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: #FFFFFF;
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    display: none;
  }
  .main-navigation.is-open {
    display: block;
  }
  .main-navigation ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .mobile-menu-toggle {
    display: inline-flex;
  }
  .hero-title {
    font-size: 2.35rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}