/* ==========================================================================
   TechSphere Theme - Main CSS Design System
   Modern Tech & Innovation Theme for WordPress 6+
   ========================================================================== */

:root {
  /* Color Tokens */
  --bg-main: #0a0e17;
  --bg-surface: #111827;
  --bg-surface-elevated: #1a2234;
  --bg-surface-hover: #222d44;
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.35);
  
  --accent-cyan: #00f0ff;
  --accent-cyan-glow: rgba(0, 240, 255, 0.3);
  --accent-emerald: #10b981;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.5);
  --border-glow: rgba(0, 240, 255, 0.3);
  
  /* Gradients */
  --gradient-cyber: linear-gradient(135deg, #6366f1 0%, #00f0ff 100%);
  --gradient-surface: linear-gradient(180deg, rgba(26, 34, 52, 0.6) 0%, rgba(17, 24, 39, 0.9) 100%);
  --gradient-dark: linear-gradient(180deg, #0a0e17 0%, #111827 100%);
  --gradient-glow: radial-gradient(circle at 50% -20%, rgba(99, 102, 241, 0.25), transparent 70%);

  /* Typography */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-code: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Layout & Spacing */
  --max-width-content: 840px;
  --max-width-wide: 1240px;
  --header-height: 74px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(0, 240, 255, 0.08) 0px, transparent 50%);
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

p {
  margin-bottom: 1.25rem;
  color: var(--text-muted);
}

.container {
  width: 100%;
  max-width: var(--max-width-wide);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-narrow {
  max-width: var(--max-width-content);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(10, 14, 23, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.site-header.is-scrolled {
  background: rgba(10, 14, 23, 0.95);
  border-bottom-color: rgba(99, 102, 241, 0.2);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

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

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

.site-logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.45rem;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.logo-icon-box {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid rgba(0, 240, 255, 0.6);
  box-shadow: 0 0 18px rgba(0, 240, 255, 0.4), 0 0 32px rgba(99, 102, 241, 0.25);
  background: var(--bg-surface);
  flex-shrink: 0;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.site-logo-link:hover .logo-icon-box {
  transform: scale(1.08);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 26px rgba(0, 240, 255, 0.7), 0 0 45px rgba(99, 102, 241, 0.4);
}

.footer-about .logo-icon-box {
  width: 58px;
  height: 58px;
}

.site-logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.site-logo-link span.tech-highlight {
  background: var(--gradient-cyber);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Main Navigation */
.main-navigation ul {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.1rem;
}

.main-navigation a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color var(--transition-fast);
}

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

.main-navigation a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-cyber);
  transition: width var(--transition-normal);
  border-radius: 2px;
}

.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;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-primary {
  background: var(--gradient-cyber);
  color: #0a0e17;
  font-weight: 700;
  box-shadow: 0 0 25px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px var(--primary-glow);
  color: #000;
}

.btn-secondary {
  background: var(--bg-surface-elevated);
  border-color: var(--border-subtle);
  color: var(--text-main);
}

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

/* Mobile Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 0.5rem;
  cursor: pointer;
}

/* Reading Progress Bar */
.reading-progress-bar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--gradient-cyber);
  z-index: 99;
  transition: width 0.1s linear;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 2.25rem 0 3.5rem;
  overflow: hidden;
  text-align: center;
  background-color: #070a13;
  background-image: 
    radial-gradient(ellipse 80% 55% at 50% 25%, rgba(10, 14, 23, 0.82) 0%, rgba(10, 14, 23, 0.5) 60%, rgba(10, 14, 23, 0.95) 100%),
    linear-gradient(180deg, rgba(10, 14, 23, 0.45) 0%, rgba(10, 14, 23, 0.25) 40%, var(--bg-main) 100%),
    url('../images/hero-tech-bg.jpg');
  background-size: cover;
  background-position: center 30%;
  background-repeat: no-repeat;
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100px;
  background: linear-gradient(to bottom, transparent, var(--bg-main));
  pointer-events: none;
  z-index: 1;
}

.hero-section .container {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(17, 24, 39, 0.9);
  border: 1px solid rgba(0, 240, 255, 0.35);
  padding: 0.4rem 1.15rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 1.15rem;
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4), 0 0 15px rgba(0, 240, 255, 0.15);
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 4.15rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.18;
  margin-bottom: 1.15rem;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
  color: #ffffff;
}

.hero-highlight {
  display: block;
  margin-top: 0.35rem;
  background: linear-gradient(135deg, #00f0ff 0%, #38bdf8 45%, #a855f7 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: #00f0ff;
  font-weight: 900;
  text-shadow: none !important;
}

.text-gradient {
  background: linear-gradient(135deg, #00f0ff 0%, #38bdf8 50%, #818cf8 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: #00f0ff;
  text-shadow: none !important;
  display: inline;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: #cbd5e1;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 1.75rem;
  font-weight: 400;
  line-height: 1.7;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.85);
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

/* ==========================================================================
   Hero Dashboard Carousel Showcase
   ========================================================================== */
.hero-preview-wrapper {
  margin: 1.5rem auto 2.5rem;
  max-width: 1120px;
  position: relative;
}

.hero-preview-wrapper::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 92%;
  height: 85%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.35) 0%, rgba(0, 240, 255, 0.18) 50%, transparent 80%);
  filter: blur(50px);
  z-index: 0;
  pointer-events: none;
}

/* Module Tabs (Above Carousel) */
.carousel-module-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.15rem;
  background: rgba(17, 24, 39, 0.75);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: all var(--transition-fast);
}

.tab-btn svg {
  color: var(--text-dim);
  transition: color var(--transition-fast);
}

.tab-btn:hover {
  background: rgba(26, 34, 52, 0.9);
  color: var(--text-main);
  border-color: rgba(99, 102, 241, 0.4);
}

.tab-btn:hover svg {
  color: var(--accent-cyan);
}

.tab-btn.is-active {
  background: rgba(99, 102, 241, 0.18);
  border-color: var(--accent-cyan);
  color: #fff;
  box-shadow: 0 0 20px var(--primary-glow);
}

.tab-btn.is-active svg {
  color: var(--accent-cyan);
}

/* Browser Frame */
.hero-preview-frame {
  position: relative;
  z-index: 1;
  background: rgba(17, 24, 39, 0.85);
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7), 0 0 35px rgba(99, 102, 241, 0.25);
  backdrop-filter: blur(16px);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.hero-preview-frame:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 240, 255, 0.55);
  box-shadow: 0 30px 60px -10px rgba(0, 0, 0, 0.85), 0 0 45px var(--accent-cyan-glow);
}

.preview-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  background: rgba(10, 14, 23, 0.95);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.8125rem;
}

.preview-dots {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

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

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

.preview-url-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.05);
  padding: 0.3rem 1.25rem;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-family: var(--font-code);
  font-size: 0.78rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.preview-badge {
  background: rgba(99, 102, 241, 0.2);
  color: var(--accent-cyan);
  border: 1px solid rgba(99, 102, 241, 0.4);
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.75rem;
  transition: all var(--transition-fast);
}

/* Slides Track & Navigation */
.hero-carousel-track-wrapper {
  position: relative;
  overflow: hidden;
  line-height: 0;
  background: #0f172a;
}

.hero-carousel-track {
  position: relative;
  width: 100%;
}

.carousel-slide {
  display: none;
  width: 100%;
  opacity: 0;
  transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide.is-active {
  display: block;
  opacity: 1;
  animation: slideFadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideFadeIn {
  from {
    opacity: 0;
    transform: scale(0.99);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.hero-preview-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.hero-preview-frame:hover .hero-preview-img {
  transform: scale(1.01);
}

/* Prev / Next Arrow Buttons */
.carousel-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(10, 14, 23, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(10px);
  z-index: 10;
  transition: all var(--transition-fast);
  opacity: 0.75;
}

.carousel-nav-btn:hover {
  background: var(--primary);
  border-color: var(--accent-cyan);
  color: #fff;
  opacity: 1;
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 0 20px var(--primary-glow);
}

.prev-btn {
  left: 1.25rem;
}

.next-btn {
  right: 1.25rem;
}

/* Dots Indicator (Bottom Bar) */
.carousel-dots-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.85rem 0;
  background: rgba(10, 14, 23, 0.95);
  border-top: 1px solid var(--border-subtle);
}

.dot-indicator {
  width: 24px;
  height: 5px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.18);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: all var(--transition-normal);
}

.dot-indicator:hover {
  background: rgba(255, 255, 255, 0.4);
}

.dot-indicator.is-active {
  background: var(--gradient-cyber);
  width: 46px;
  box-shadow: 0 0 10px var(--accent-cyan-glow);
}

@media (max-width: 768px) {
  .carousel-module-tabs {
    gap: 0.5rem;
  }
  .tab-btn {
    font-size: 0.8rem;
    padding: 0.35rem 0.75rem;
  }
  .carousel-nav-btn {
    width: 36px;
    height: 36px;
  }
  .prev-btn { left: 0.5rem; }
  .next-btn { right: 0.5rem; }
}

@media (max-width: 768px) {
  .preview-url-bar {
    display: none;
  }
}

/* Stats Counter Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
  padding: 2rem;
  background: var(--gradient-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
}

.stat-item h3 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  background: var(--gradient-cyber);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.25rem;
}

.stat-item p {
  font-size: 0.875rem;
  margin-bottom: 0;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   Features Section
   ========================================================================== */
.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
}

.feature-card {
  background: var(--gradient-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2.25rem 1.75rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, transparent, rgba(99, 102, 241, 0.3), transparent);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 15px 35px -10px var(--primary-glow);
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 1.5rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.feature-card p {
  font-size: 0.9375rem;
  margin-bottom: 0;
}

/* ==========================================================================
   Article Grid & Cards
   ========================================================================== */
.articles-section {
  padding: 5rem 0;
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.post-card {
  background: var(--gradient-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.post-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 240, 255, 0.3);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.6);
}

.post-card-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-surface-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-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.post-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  gap: 0.5rem;
}

.category-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-cyan);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-cyan);
}

.reading-time {
  font-size: 0.8125rem;
  color: var(--text-dim);
}

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

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

.post-card-excerpt {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  flex: 1;
}

.post-meta-bottom {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8125rem;
  color: var(--text-dim);
}

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

/* ==========================================================================
   Single Article Layout
   ========================================================================== */
.single-post-header {
  padding: 4rem 0 2.5rem;
  text-align: center;
}

.single-post-title {
  font-size: clamp(2.25rem, 4vw, 3.25rem);
  margin: 1.25rem 0;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.single-featured-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 2rem 0 3rem;
  border: 1px solid var(--border-subtle);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.entry-content {
  font-size: 1.125rem;
  line-height: 1.8;
  color: #cbd5e1;
}

.entry-content h2 {
  font-size: 1.85rem;
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.entry-content h3 {
  font-size: 1.45rem;
  margin: 2rem 0 0.75rem;
}

.entry-content ul, .entry-content ol {
  margin: 1.25rem 0 1.5rem 2rem;
}

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

.entry-content code {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-cyan);
  padding: 0.18rem 0.45rem;
  border-radius: 4px;
  font-family: var(--font-code);
  font-size: 0.88em;
  border: 1px solid rgba(99, 102, 241, 0.25);
}

.entry-content pre {
  background: #06090e;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1.75rem 0;
  font-family: var(--font-code);
  font-size: 0.9375rem;
  color: #38bdf8;
  line-height: 1.6;
}

.entry-content pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.entry-content blockquote {
  border-left: 4px solid var(--primary);
  padding: 1rem 1.5rem;
  margin: 1.75rem 0;
  background: rgba(99, 102, 241, 0.08);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--text-main);
}

/* Rich Tables */
.entry-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.9375rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: rgba(17, 24, 39, 0.7);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.entry-content th {
  background: rgba(26, 34, 52, 0.95);
  color: var(--text-main);
  font-weight: 700;
  padding: 0.9rem 1.15rem;
  text-align: left;
  border-bottom: 1px solid rgba(99, 102, 241, 0.35);
  font-family: var(--font-heading);
}

.entry-content td {
  padding: 0.85rem 1.15rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

.entry-content tr:last-child td {
  border-bottom: none;
}

.entry-content tr:hover td {
  background: rgba(99, 102, 241, 0.06);
  color: var(--text-main);
}

/* Terminal Mockup Window */
.terminal-window {
  margin: 1.75rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: #06090e;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background: rgba(15, 23, 42, 0.95);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-code);
  font-size: 0.8rem;
  color: var(--text-dim);
}

.terminal-header .dots {
  display: flex;
  gap: 0.4rem;
}

.terminal-header .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.terminal-header .dot-r { background: #ef4444; }
.terminal-header .dot-y { background: #f59e0b; }
.terminal-header .dot-g { background: #10b981; }

.terminal-window pre {
  margin: 0;
  border: none;
  border-radius: 0;
  padding: 1.15rem 1.25rem;
  background: transparent;
  color: #38bdf8;
  line-height: 1.65;
}

/* Callout Alert Boxes */
.callout-box {
  display: flex;
  gap: 1.15rem;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  margin: 2rem 0;
  font-size: 0.975rem;
  line-height: 1.6;
}

.callout-box.callout-info {
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-left: 4px solid var(--primary);
}

.callout-box.callout-warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-left: 4px solid #f59e0b;
}

.callout-box.callout-success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-left: 4px solid #10b981;
}

.callout-icon {
  font-size: 1.4rem;
  line-height: 1;
  flex-shrink: 0;
}

/* Step Card for Tutorials */
.guide-step-card {
  background: rgba(17, 24, 39, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 2.5rem 0;
  position: relative;
  transition: border-color var(--transition-fast);
}

.guide-step-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
}

.guide-step-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.guide-step-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient-cyber);
  color: #06090e;
  font-weight: 800;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 15px var(--accent-cyan-glow);
}

.guide-step-header h3 {
  margin: 0;
  font-size: 1.35rem;
  color: var(--text-main);
}

/* Author Box */
.author-bio-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem;
  background: var(--gradient-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin: 4rem 0 2rem;
}

.author-bio-card img {
  border-radius: 50%;
  border: 2px solid var(--primary);
}

/* ==========================================================================
   Comments System
   ========================================================================== */
.comments-area {
  margin-top: 4rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border-subtle);
}

.comment-list {
  list-style: none;
  margin: 2rem 0;
}

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

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form textarea {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 0.75rem 1rem;
  font-family: inherit;
  margin-bottom: 1rem;
  transition: border-color var(--transition-fast);
}

.comment-form input:focus,
.comment-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  margin-top: auto;
  background: #06090e;
  border-top: 1px solid var(--border-subtle);
  padding: 4.5rem 0 2rem;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.8fr 1.15fr 1.15fr;
  gap: 3.5rem;
  margin-bottom: 3.5rem;
}

.footer-widget-title {
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
  color: var(--text-main);
}

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

.footer-widget li {
  margin-bottom: 0.65rem;
}

.footer-widget a {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.footer-widget a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.875rem;
  color: var(--text-dim);
}

/* Back to top button */
.back-to-top-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.back-to-top-btn:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-3px);
}

/* ==========================================================================
   Contact Section & Form Styles
   ========================================================================== */
.contact-section {
  background: radial-gradient(circle at 50% 100%, rgba(99, 102, 241, 0.12) 0%, transparent 60%);
  border-top: 1px solid var(--border-subtle);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 3rem;
  align-items: start;
  margin-top: 1rem;
}

.contact-info-card {
  background: var(--gradient-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.75rem 2.25rem;
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.contact-info-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-cyber);
}

.contact-info-card h3 {
  font-size: 1.65rem;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.contact-benefit-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin: 2rem 0;
}

.contact-benefit-item {
  display: flex;
  align-items: flex-start;
  gap: 1.15rem;
}

.benefit-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-benefit-item h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  color: var(--text-main);
}

.contact-benefit-item p {
  font-size: 0.88rem;
  margin-bottom: 0;
  color: var(--text-muted);
  line-height: 1.5;
}

.contact-direct-badges {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-subtle);
}

.direct-badge {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.direct-badge svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* Contact Form Wrapper */
.contact-form-wrapper {
  background: var(--gradient-surface);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-lg);
  padding: 2.75rem 2.5rem;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5), 0 0 30px rgba(99, 102, 241, 0.15);
  backdrop-filter: blur(16px);
  position: relative;
}

.techsphere-form {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
  font-family: var(--font-heading);
}

.form-group label .required {
  color: var(--accent-cyan);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: rgba(10, 14, 23, 0.75);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.15rem;
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
  outline: none;
}

.form-group select option {
  background: #111827;
  color: #f8fafc;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25), 0 0 15px var(--primary-glow);
  background: rgba(17, 24, 39, 0.95);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-dim);
}

.form-status {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  line-height: 1.5;
}

.status-success {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #34d399;
}

.status-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #f87171;
}

.btn-submit {
  width: 100%;
  padding: 1.1rem;
  font-size: 1.05rem;
  margin-top: 0.5rem;
  cursor: pointer;
  border: none;
}

.btn-submit:hover:not(:disabled) {
  box-shadow: 0 0 30px var(--primary-glow);
}

.btn-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
  vertical-align: middle;
  margin-left: 0.5rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .main-navigation {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(10, 14, 23, 0.98);
    backdrop-filter: blur(20px);
    padding: 2rem;
    border-bottom: 1px solid var(--border-subtle);
    display: none;
  }

  .main-navigation.is-open {
    display: block;
  }

  .main-navigation ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form-wrapper {
    padding: 2rem 1.5rem;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* ==========================================================================
   WhatsApp Floating Widget & CTA Buttons
   ========================================================================== */

/* In-Page WhatsApp Button */
.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
  color: #ffffff !important;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 4px 18px rgba(37, 211, 102, 0.35);
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.btn-whatsapp:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 211, 102, 0.55), 0 0 15px rgba(37, 211, 102, 0.3);
  color: #ffffff !important;
}

.btn-whatsapp svg {
  flex-shrink: 0;
  color: #ffffff;
}

/* Direct Badge WhatsApp */
.direct-badge-whatsapp {
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.direct-badge-whatsapp svg {
  color: #25D366 !important;
}

.direct-badge-whatsapp:hover {
  color: #25D366;
  transform: translateX(4px);
}

/* Ocultar la insignia flotante de reCAPTCHA para evitar la errata de Google y mantener la interfaz limpia */
.grecaptcha-badge {
  visibility: hidden !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

/* Floating Widget Container */
.techsphere-whatsapp-float-container {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  font-family: var(--font-body);
}

/* Floating Button */
.techsphere-whatsapp-float-btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 25px rgba(37, 211, 102, 0.45), 0 4px 12px rgba(0, 0, 0, 0.5);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  text-decoration: none;
  cursor: pointer;
}

.techsphere-whatsapp-float-btn:hover {
  transform: scale(1.08) translateY(-3px);
  box-shadow: 0 14px 35px rgba(37, 211, 102, 0.65), 0 6px 16px rgba(0, 0, 0, 0.6);
  color: #ffffff;
}

.whatsapp-icon-svg {
  width: 32px;
  height: 32px;
  fill: #ffffff;
  transition: transform 0.25s ease;
}

.techsphere-whatsapp-float-btn:hover .whatsapp-icon-svg {
  transform: scale(1.05);
}

/* Pulse Radar Animations */
.whatsapp-pulse-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: rgba(37, 211, 102, 0.5);
  animation: whatsapp-pulse-anim 2.4s infinite cubic-bezier(0.25, 1, 0.5, 1);
  pointer-events: none;
  z-index: -1;
}

.whatsapp-pulse-ring.ring-secondary {
  animation-delay: 1.2s;
}

@keyframes whatsapp-pulse-anim {
  0% {
    transform: scale(0.95);
    opacity: 0.85;
  }
  70% {
    transform: scale(1.6);
    opacity: 0.15;
  }
  100% {
    transform: scale(1.85);
    opacity: 0;
  }
}

/* Badge on hover */
.whatsapp-btn-badge {
  position: absolute;
  right: 72px;
  background: rgba(10, 14, 23, 0.95);
  border: 1px solid rgba(37, 211, 102, 0.4);
  color: #25D366;
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0.4rem 0.85rem;
  border-radius: 20px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transform: translateX(8px);
  transition: all 0.25s ease;
  pointer-events: none;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

.techsphere-whatsapp-float-btn:hover .whatsapp-btn-badge {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

/* Tooltip Popup Card */
.whatsapp-tooltip-card {
  width: 320px;
  background: rgba(15, 23, 42, 0.96);
  border: 1px solid rgba(37, 211, 102, 0.35);
  border-radius: 16px;
  padding: 1.25rem;
  margin-bottom: 14px;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.6), 0 0 25px rgba(37, 211, 102, 0.15);
  backdrop-filter: blur(16px);
  transform-origin: bottom right;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  opacity: 0;
  visibility: hidden;
  transform: scale(0.92) translateY(12px);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  position: relative;
}

.whatsapp-tooltip-card.is-visible {
  opacity: 1;
  visibility: visible;
  transform: scale(1) translateY(0);
}

.whatsapp-tooltip-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  position: relative;
}

.whatsapp-agent-avatar {
  position: relative;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.whatsapp-agent-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 2px solid #25D366;
  object-fit: cover;
}

.online-indicator-dot {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 10px;
  height: 10px;
  background: #10b981;
  border: 2px solid #0f172a;
  border-radius: 50%;
  box-shadow: 0 0 6px #10b981;
}

.whatsapp-agent-meta {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.agent-name {
  color: var(--text-main);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.2;
}

.agent-status {
  font-size: 0.75rem;
  color: #34d399;
  font-weight: 500;
}

.whatsapp-close-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  line-height: 1;
  transition: color 0.2s ease;
}

.whatsapp-close-btn:hover {
  color: var(--text-main);
}

.whatsapp-tooltip-body {
  background: rgba(10, 14, 23, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 0.85rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.whatsapp-tooltip-body p {
  margin: 0;
}

.whatsapp-tooltip-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: #25D366;
  color: #06090e !important;
  font-weight: 700;
  font-size: 0.875rem;
  padding: 0.65rem 1rem;
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.whatsapp-tooltip-cta:hover {
  background: #20ba5a;
  transform: translateY(-1px);
  color: #000000 !important;
}

/* Mobile Responsiveness for WhatsApp Widget */
@media (max-width: 768px) {
  .techsphere-whatsapp-float-container {
    bottom: 20px;
    right: 20px;
  }

  .techsphere-whatsapp-float-btn {
    width: 52px;
    height: 52px;
  }

  .whatsapp-icon-svg {
    width: 26px;
    height: 26px;
  }

  .whatsapp-btn-badge {
    display: none;
  }

  .whatsapp-tooltip-card {
    width: calc(100vw - 40px);
    max-width: 300px;
    right: 0;
  }
}