:root {
  color-scheme: dark;
  --ia-bg-deep: #030712;
  --ia-bg-mid: #08111f;
  --ia-bg-surface: #0b1220;
  --ia-primary: #3b82f6;
  --ia-cyan: #22d3ee;
  --ia-violet: #8b5cf6;
  --ia-text: #f8fafc;
  --ia-muted: #94a3b8;
  --ia-glass: rgba(11, 18, 32, 0.72);
  --ia-glass-border: rgba(255, 255, 255, 0.08);
  --wh-primary: var(--ia-primary);
  --wh-secondary: var(--ia-bg-deep);
  --wh-accent: var(--ia-cyan);
  --wh-white: #fafbfc;
  --wh-gray: #64748b;
  --wh-radius: 16px;
  --wh-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  --wh-container: 1200px;
}

*, *::before, *::after { box-sizing: border-box; }

body.ia-dark {
  margin: 0;
  background: var(--ia-bg-deep);
  color: var(--ia-text);
  font-family: Inter, system-ui, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

img, canvas, video, svg { max-width: 100%; height: auto; }

a { color: var(--ia-cyan); text-decoration: none; }
a:hover { opacity: 0.9; }

.container {
  width: min(100% - 2rem, var(--wh-container));
  margin-inline: auto;
}

/* Header */
.site-header.ia-header {
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--ia-glass-border);
  color: #fff;
  position: relative;
  z-index: 100;
}

.site-header.is-sticky { position: sticky; top: 0; }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.ia-logo { color: #fff; font-weight: 700; display: flex; align-items: center; gap: 0.5rem; }
.ia-logo-link {
  text-decoration: none;
  line-height: 0;
}
.ia-logo-img {
  display: block;
  height: 36px;
  width: auto;
  max-width: min(220px, 52vw);
  object-fit: contain;
}
.custom-logo-link {
  display: flex;
  align-items: center;
  line-height: 0;
}
.custom-logo-link img,
.custom-logo {
  display: block;
  height: 36px;
  width: auto;
  max-width: min(220px, 52vw);
  object-fit: contain;
}
.ia-logo-mark {
  display: inline-flex;
  width: 32px; height: 32px;
  align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--ia-primary), var(--ia-violet));
  border-radius: 8px;
  font-size: 0.75rem;
}

.primary-menu {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.primary-menu a {
  color: var(--ia-muted);
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
}

.primary-menu a:hover { color: #fff; background: rgba(255,255,255,0.05); }

.primary-menu .current-menu-item > a,
.primary-menu .current-menu-ancestor > a {
  color: #fff;
  background: rgba(59,130,246,0.2);
}

.primary-navigation {
  display: block;
  flex: 1;
  min-width: 0;
}

@media (min-width: 901px) {
  .header-inner {
    flex-wrap: nowrap;
  }

  .primary-navigation {
    display: flex;
    justify-content: center;
  }
}

.menu-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  color: #fff;
  padding: 0.5rem;
  flex-direction: column;
  gap: 5px;
  z-index: 101;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  position: relative;
  z-index: 2;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.btn:hover { opacity: 0.95; transform: translateY(-1px); }
.btn:active { transform: translateY(0); opacity: 1; }

.btn-primary {
  background: linear-gradient(135deg, var(--ia-primary), var(--ia-violet));
  color: #fff !important;
  padding: 0.75rem 1.5rem;
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.3);
  gap: 0.5rem;
}

.btn-primary .btn-label,
.btn-primary .btn-icon,
.btn-outline .btn-label,
.btn-outline .btn-icon {
  color: #fff !important;
  display: inline-block;
  pointer-events: none;
}

.btn-outline {
  border-color: rgba(255,255,255,0.25);
  color: #fff !important;
  padding: 0.75rem 1.5rem;
  background: rgba(255,255,255,0.05);
  gap: 0.5rem;
}

.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.4); }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--ia-glass-border);
  color: var(--ia-muted) !important;
  padding: 0.75rem 1.25rem;
}

.btn-ghost:hover { color: #fff !important; border-color: var(--ia-cyan); background: rgba(34,211,238,0.08); }

.btn-link { background: none; border: 0; color: var(--ia-muted); padding: 0.5rem; cursor: pointer; }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn-lg { padding: 0.9rem 1.75rem; }

/* Hero */
.hero-section.ia-hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 6rem 0 4rem;
}

.ia-aurora {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(59,130,246,0.18), transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(139,92,246,0.12), transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(34,211,238,0.08), transparent 50%),
    var(--ia-bg-deep);
}

.ia-hero-grid {
  display: grid;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

@media (min-width: 992px) {
  .ia-hero-grid { grid-template-columns: 1fr 1fr; }
  .ia-hero-grid.ia-hero-centered { grid-template-columns: 1fr; }
}

.ia-hero-centered {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
}

.ia-hero-centered .hero-subtitle {
  margin-left: auto;
  margin-right: auto;
}

.ia-hero-centered .ia-hero-pills,
.ia-hero-centered .hero-actions {
  justify-content: center;
}

.ia-hero-centered .ia-hero-stats {
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.ia-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--ia-glass-border);
  background: rgba(255,255,255,0.05);
  padding: 0.35rem 1rem;
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--ia-cyan);
}

.ia-pulse-dot {
  width: 8px; height: 8px;
  background: var(--ia-cyan);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.05;
  margin: 1rem 0;
  font-weight: 800;
  color: #fff;
}

.hero-title .text-gradient {
  display: block;
}

.text-gradient {
  background: linear-gradient(135deg, #fff 0%, var(--ia-cyan) 50%, var(--ia-violet) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle { font-size: 1.125rem; color: var(--ia-muted); max-width: 540px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2rem; position: relative; z-index: 3; justify-content: flex-start; }
.ia-hero-content { position: relative; z-index: 2; }
.ia-hero-visual { position: relative; z-index: 2; }
.hero-trust { display: flex; flex-wrap: wrap; gap: 1.5rem; margin-top: 2rem; color: var(--ia-muted); font-size: 0.9rem; }

.ia-scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--ia-muted);
  animation: bounce 2s infinite;
}

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

/* Globe */
.ia-globe-wrap { position: relative; aspect-ratio: 1; max-width: 480px; margin: 0 auto; }
.ia-globe-canvas { width: 100%; height: 100%; display: block; }
.ia-globe-icons {
  position: absolute;
  inset: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  pointer-events: none;
}

.ia-globe-icons .ia-globe-icon-box:nth-child(odd) { animation-delay: -2s; }
.ia-globe-icons .ia-globe-icon-box:nth-child(even) { animation-delay: -4s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Glass cards */
.ia-glass-card, .glass-card {
  background: var(--ia-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--ia-glass-border);
  border-radius: var(--wh-radius);
  transition: transform 0.2s, border-color 0.2s;
}

.ia-glass-card:hover, .glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 211, 238, 0.3);
}

.ia-card-grid, .card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr));
  gap: 1.25rem;
}

.ia-learn-card {
  position: relative;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.ia-learn-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 211, 238, 0.35);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.ia-learn-card a {
  display: block;
  padding: 1.5rem;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  z-index: 1;
}
.ia-learn-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.ia-card-icon { font-size: 2rem; display: block; line-height: 1; }

/* SVG icon system */
.ia-icon-svg {
  display: block;
  flex-shrink: 0;
  color: #22d3ee;
  stroke: currentColor;
}

.ia-icon-inline {
  display: inline-block;
  vertical-align: middle;
}

.ia-icon-box {
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(59, 130, 246, 0.22), rgba(139, 92, 246, 0.12));
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #22d3ee;
  flex-shrink: 0;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.ia-icon-box--lg {
  width: 72px;
  height: 72px;
  border-radius: 20px;
}

.ia-icon-box--lg .ia-icon-svg {
  color: #38bdf8;
}

.ia-learn-card:hover .ia-icon-box {
  border-color: rgba(34, 211, 238, 0.35);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.2);
}

.ia-feature-icon-wrap .ia-icon-svg {
  width: 28px;
  height: 28px;
}

.ia-step-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  border-radius: 16px;
  background: linear-gradient(145deg, rgba(59, 130, 246, 0.18), rgba(139, 92, 246, 0.1));
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #22d3ee;
}

.ia-trust-icon {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(59, 130, 246, 0.15);
  color: #38bdf8;
  flex-shrink: 0;
}

.ia-pill-icon {
  gap: 0.45rem;
}

.ia-pill-icon .ia-icon-svg {
  color: #38bdf8;
}

.ia-feature-icon {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(59, 130, 246, 0.12);
  color: #22d3ee;
  flex-shrink: 0;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-icon .ia-icon-svg {
  color: currentColor;
}

.ia-globe-icon-box {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--ia-glass-border);
  border-radius: 12px;
  color: #22d3ee;
  animation: float 6s ease-in-out infinite;
}

.ia-topic-header .ia-icon-box--lg {
  flex-shrink: 0;
}

.ia-tool-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.ia-tool-tab .ia-icon-svg {
  color: #38bdf8;
}

.ia-fab-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}
.ia-level-chip {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.ia-learn-card h3 { color: #fff; margin: 0 0 0.5rem; font-size: 1.1rem; }
.ia-learn-card p { color: var(--ia-muted); font-size: 0.875rem; margin: 0; line-height: 1.55; min-height: 2.8em; }
.ia-meta { display: block; margin-top: 1rem; padding-top: 0.85rem; border-top: 1px solid var(--ia-glass-border); font-size: 0.8rem; color: var(--ia-muted); }
.ia-meta strong { color: var(--ia-cyan); font-weight: 700; }

/* Feature cards (homepage platform grid) */
.ia-features-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.ia-feature-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 240px;
  padding: 1.85rem;
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 18px;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
}

.ia-feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(34, 211, 238, 0.45);
  background: rgba(15, 23, 42, 0.85);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.ia-feature-card:hover .ia-feature-icon-wrap {
  border-color: rgba(34, 211, 238, 0.35);
  box-shadow: 0 0 24px rgba(59, 130, 246, 0.25);
}

.ia-feature-stretch-link {
  position: absolute;
  inset: 0;
  z-index: 3;
  border-radius: inherit;
  text-indent: -9999px;
  overflow: hidden;
}

.ia-feature-stretch-link:focus-visible {
  outline: 2px solid var(--ia-cyan);
  outline-offset: 3px;
}

.ia-feature-icon-wrap {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.35rem;
  border-radius: 16px;
  background: linear-gradient(145deg, rgba(59, 130, 246, 0.22), rgba(139, 92, 246, 0.12));
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #22d3ee;
  transition: border-color 0.22s ease, box-shadow 0.22s ease;
}

.ia-feature-title {
  position: relative;
  z-index: 1;
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  color: #ffffff !important;
  letter-spacing: -0.02em;
}

.ia-feature-desc {
  position: relative;
  z-index: 1;
  margin: 0;
  flex: 1;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: #94a3b8 !important;
}

.ia-feature-cta {
  position: relative;
  z-index: 1;
  display: block;
  margin-top: auto;
  padding-top: 1.1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #22d3ee !important;
}

.ia-home-features {
  background: linear-gradient(180deg, var(--ia-bg-deep) 0%, var(--ia-bg-mid) 45%, var(--ia-bg-deep) 100%);
}

.ia-home-features .ia-section-head {
  margin-bottom: 2.75rem;
}

.ia-home-features .section-title {
  margin-bottom: 0.85rem;
  color: #ffffff !important;
}

.ia-home-features .section-subtitle {
  max-width: 580px;
  margin: 0 auto;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: #94a3b8 !important;
}

@media (max-width: 992px) {
  .ia-features-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

@media (max-width: 560px) {
  .ia-features-grid {
    grid-template-columns: 1fr;
  }

  .ia-feature-card {
    min-height: 0;
    padding: 1.5rem;
  }

  .ia-feature-title {
    font-size: 1.0625rem;
  }

  .ia-feature-desc {
    font-size: 0.9rem;
  }
}

/* Sections */
.section, .ia-section { padding: 5rem 0; }
.ia-section-alt { background: var(--ia-bg-mid); }
.section-title { text-align: center; font-size: clamp(1.75rem, 3vw, 2.5rem); margin-bottom: 0.5rem; color: #fff; }
.section-subtitle { text-align: center; color: var(--ia-muted); margin-bottom: 2.5rem; }
.section-title.text-left { text-align: left; }

.two-col {
  display: grid;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 768px) {
  .two-col { grid-template-columns: 1.2fr 0.8fr; }
}

.feature-list { list-style: none; padding: 0; }
.feature-list li { padding: 0.75rem 0; border-bottom: 1px solid var(--ia-glass-border); color: var(--ia-muted); }
.feature-list strong { color: #fff; }

/* Stats */
.stats-panel, .ia-stats-grid { display: grid; gap: 1rem; }
.ia-stat-item {
  background: var(--ia-bg-surface);
  border: 1px solid var(--ia-glass-border);
  border-radius: var(--wh-radius);
  padding: 1.25rem;
  text-align: center;
}

.ia-stat-number { display: block; font-size: 2rem; font-weight: 800; color: var(--ia-cyan); }
.ia-stat-label { color: var(--ia-muted); font-size: 0.875rem; }

/* FAQ */
.ia-faq-item { border: 1px solid var(--ia-glass-border); border-radius: 12px; margin-bottom: 0.75rem; overflow: hidden; }
.ia-faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  color: #fff;
  padding: 1rem 1.25rem;
  font-weight: 600;
  cursor: pointer;
}

.ia-faq-answer { display: none; padding: 0 1.25rem 1rem; color: var(--ia-muted); }
.ia-faq-item.is-open .ia-faq-answer { display: block; }

/* CTA */
.ia-cta-section {
  background: linear-gradient(135deg, var(--ia-bg-mid), rgba(59,130,246,0.2));
  text-align: center;
  padding: 5rem 0;
}

.cta-inner h2 { font-size: 2rem; color: #fff; }
.cta-inner p { color: var(--ia-muted); }
.cta-inner .btn { margin: 0.5rem; }

/* Footer */
.ia-footer {
  background: var(--ia-bg-mid);
  border-top: 1px solid var(--ia-glass-border);
  color: var(--ia-muted);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.footer-links h4 { color: #fff; margin-bottom: 1rem; }
.footer-links ul { list-style: none; padding: 0; }
.footer-links a { color: var(--ia-muted); font-size: 0.875rem; }
.footer-bottom {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--ia-glass-border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.875rem;
}

/* Page */
.ia-page { padding: 6rem 0 4rem; }
.page-header { margin-bottom: 2rem; }
.page-header h1 { font-size: 2.5rem; color: #fff; margin: 0; }

/* DNS Simulator */
.ia-dns-simulator { margin-top: 1.5rem; }
.ia-input {
  width: 100%;
  max-width: 400px;
  padding: 0.875rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--ia-glass-border);
  background: rgba(0,0,0,0.3);
  color: #fff;
  margin-bottom: 1.5rem;
}

.ia-dns-step {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  margin-bottom: 0.5rem;
  border: 1px solid var(--ia-glass-border);
  border-radius: 12px;
  opacity: 0.4;
  transition: 0.3s;
}

.ia-dns-step.active { opacity: 1; border-color: var(--ia-cyan); background: rgba(34,211,238,0.05); }
.ia-step-num {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(59,130,246,0.2);
  border-radius: 50%;
  font-weight: 700;
  color: var(--ia-cyan);
}

.ia-dns-controls { display: flex; gap: 0.75rem; margin-top: 1.5rem; flex-wrap: wrap; }

/* Quiz */
.ia-quiz { max-width: 600px; }
.ia-quiz-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.ia-xp { background: rgba(139,92,246,0.2); padding: 0.35rem 0.75rem; border-radius: 999px; color: var(--ia-violet); font-size: 0.875rem; }
.ia-quiz-option {
  display: block;
  width: 100%;
  text-align: left;
  padding: 1rem;
  margin-bottom: 0.5rem;
  border: 1px solid var(--ia-glass-border);
  border-radius: 12px;
  background: transparent;
  color: #fff;
  cursor: pointer;
}

.ia-quiz-option.correct { border-color: #22c55e; background: rgba(34,197,94,0.1); }
.ia-quiz-option.wrong { border-color: #ef4444; background: rgba(239,68,68,0.1); }
.ia-quiz-option:disabled { cursor: default; opacity: 0.85; }
.ia-quiz-result { text-align: center; padding: 2rem; }
.ia-quiz-result h3 { color: #fff; }
.ia-quiz-restart { margin-top: 1rem; }

/* AI Tutor */
.ia-ai-tutor { max-width: 700px; border: 1px solid var(--ia-glass-border); border-radius: var(--wh-radius); overflow: hidden; }
.ia-chat-messages { min-height: 300px; max-height: 400px; overflow-y: auto; padding: 1rem; }
.ia-chat-msg { padding: 0.75rem 1rem; border-radius: 12px; margin-bottom: 0.75rem; font-size: 0.9rem; max-width: 85%; }
.ia-assistant { background: rgba(255,255,255,0.05); color: var(--ia-muted); }
.ia-user { background: rgba(59,130,246,0.2); color: #fff; margin-left: auto; }
.ia-chat-suggestions { padding: 0 1rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.ia-suggestion { border: 1px solid var(--ia-glass-border); background: transparent; color: var(--ia-muted); padding: 0.35rem 0.75rem; border-radius: 999px; font-size: 0.75rem; cursor: pointer; }
.ia-chat-form { display: flex; gap: 0.5rem; padding: 1rem; border-top: 1px solid var(--ia-glass-border); }
.ia-chat-form .ia-input { margin: 0; flex: 1; max-width: none; }

/* Tools */
.ia-tools-nav { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }
.ia-tool-tab { border: 1px solid var(--ia-glass-border); background: transparent; color: var(--ia-muted); padding: 0.5rem 1rem; border-radius: 8px; cursor: pointer; }
.ia-tool-tab.active { background: rgba(59,130,246,0.2); color: #fff; }
.ia-tool-output { margin-top: 1rem; padding: 1rem; background: rgba(0,0,0,0.4); border-radius: 12px; color: var(--ia-cyan); font-family: monospace; white-space: pre-wrap; }

/* Compare & Career */
.ia-compare-grid, .ia-career-grid, .ia-encyclopedia-list { display: grid; gap: 1rem; }
.ia-compare-card, .ia-ency-item { padding: 1.5rem; }
.ia-vs { display: flex; gap: 1rem; align-items: center; margin: 1rem 0; color: var(--ia-muted); }
.ia-verdict { color: var(--ia-cyan); font-size: 0.9rem; }

.content-area { padding: 4rem 0; color: var(--ia-muted); }
.entry-content { color: var(--ia-muted); margin-top: 2rem; }

@media (max-width: 900px) {
  .ia-hero-flow { overflow-x: visible; }
  .ia-flow-steps { min-width: 0; }
}

/* ===== ENHANCED HERO ===== */
.ia-hero-enhanced { min-height: auto; padding: 7rem 0 3rem; }

.ia-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
  pointer-events: none;
}

.ia-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.ia-particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--ia-cyan);
  border-radius: 50%;
  opacity: 0.4;
  animation: particle-float 8s ease-in-out infinite;
}

@keyframes particle-float {
  0%, 100% { transform: translateY(0); opacity: 0.2; }
  50% { transform: translateY(-20px); opacity: 0.8; }
}

.ia-hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.25rem 0;
  justify-content: flex-start;
}

.ia-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--ia-glass-border);
  background: rgba(255,255,255,0.04);
  color: var(--ia-muted) !important;
  font-size: 0.8rem;
  transition: 0.2s;
}

.ia-pill:hover {
  border-color: var(--ia-cyan);
  color: #fff !important;
  background: rgba(34,211,238,0.08);
}

.ia-hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--ia-glass-border);
}

.ia-hero-stat { text-align: center; }
.ia-hero-stat .ia-stat-num {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--ia-cyan);
}
.ia-hero-stat span { font-size: 0.75rem; color: var(--ia-muted); }

.ia-hero-orbit { position: relative; }

.ia-float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: rgba(11,18,32,0.9);
  border: 1px solid var(--ia-glass-border);
  border-radius: 12px;
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  animation: float 5s ease-in-out infinite;
  z-index: 2;
}

.ia-float-card strong { display: block; color: #fff; font-size: 0.85rem; }
.ia-float-card small { color: var(--ia-muted); font-size: 0.7rem; }
.ia-float-icon { font-size: 1.25rem; }

.ia-float-1 { top: 5%; left: -5%; animation-delay: 0s; }
.ia-float-2 { top: 15%; right: -8%; animation-delay: 1s; }
.ia-float-3 { bottom: 25%; left: -10%; animation-delay: 2s; }
.ia-float-4 { bottom: 10%; right: -5%; animation-delay: 1.5s; }

.ia-hero-flow {
  margin-top: 4rem;
  padding: 2rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--ia-glass-border);
  border-radius: var(--wh-radius);
  position: relative;
  z-index: 1;
}

.ia-flow-label {
  text-align: center;
  color: var(--ia-muted);
  font-size: 0.875rem;
  margin: 0 0 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.ia-flow-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.ia-flow-step {
  text-align: center;
  padding: 1rem;
  min-width: 90px;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--ia-glass-border);
  border-radius: 12px;
}

.ia-flow-step span {
  display: inline-flex;
  width: 24px; height: 24px;
  align-items: center; justify-content: center;
  background: rgba(59,130,246,0.2);
  border-radius: 50%;
  font-size: 0.75rem;
  color: var(--ia-cyan);
  margin-bottom: 0.5rem;
}

.ia-flow-step strong { display: block; color: #fff; font-size: 0.8rem; }
.ia-flow-step small { color: var(--ia-muted); font-size: 0.7rem; }
.ia-flow-step-highlight { border-color: var(--ia-cyan); background: rgba(34,211,238,0.08); }
.ia-flow-arrow { color: var(--ia-muted); font-size: 1.25rem; }

.ia-scroll-indicator {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  color: var(--ia-muted);
  font-size: 0.75rem;
  text-decoration: none;
  animation: bounce 2s infinite;
  z-index: 2;
}

.ia-scroll-arrow { font-size: 1.25rem; }

/* Trust banner */
.ia-trust-banner {
  background: linear-gradient(90deg, rgba(59,130,246,0.1), rgba(139,92,246,0.1));
  border-bottom: 1px solid var(--ia-glass-border);
  padding: 1rem 0;
}

.ia-trust-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem 2rem;
}

.ia-trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--ia-muted);
}

/* Section headers */
.ia-section-head { text-align: center; margin-bottom: 3rem; }
.ia-section-tag {
  display: inline-block;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  background: rgba(59,130,246,0.15);
  color: var(--ia-cyan);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.ia-section-cta { text-align: center; margin-top: 2.5rem; }

/* Steps grid */
.ia-steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.ia-step-card {
  padding: 2rem;
  background: var(--ia-glass);
  border: 1px solid var(--ia-glass-border);
  border-radius: var(--wh-radius);
  position: relative;
  transition: 0.2s;
}

.ia-step-card:hover {
  border-color: rgba(34,211,238,0.3);
  transform: translateY(-4px);
}

.ia-step-card .ia-step-num {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 2rem;
  font-weight: 800;
  color: rgba(255,255,255,0.06);
}

.ia-step-card h3 { color: #fff; margin: 0 0 0.75rem; }
.ia-step-card p { color: var(--ia-muted); font-size: 0.9rem; margin: 0; }

/* Mastery grid */
.ia-mastery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
  gap: 1.25rem;
}

.ia-mastery-card { padding: 1.75rem; }
.ia-mastery-icon { font-size: 2rem; display: block; margin-bottom: 0.75rem; }
.ia-mastery-card h3 { color: #fff; margin: 0 0 0.5rem; font-size: 1.05rem; }
.ia-mastery-card p { color: var(--ia-muted); font-size: 0.875rem; margin: 0; line-height: 1.6; }

.ia-section-dark { background: var(--ia-bg-surface); }

.ia-text-muted { color: var(--ia-muted); line-height: 1.7; margin: 1rem 0 1.5rem; }

.ia-check-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
}

.ia-check-list li {
  padding: 0.5rem 0;
  color: var(--ia-muted);
  font-size: 0.9rem;
}

.ia-simulator-box { padding: 1.5rem; }

.ia-stats-panel {
  display: grid;
  gap: 1rem;
}

.ia-feature-list li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem 0;
  border-bottom: 1px solid var(--ia-glass-border);
}

.ia-feature-list p { margin: 0.25rem 0 0; font-size: 0.875rem; color: var(--ia-muted); }

/* AI Banner */
.ia-ai-banner {
  background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(139,92,246,0.15));
  border-top: 1px solid var(--ia-glass-border);
  border-bottom: 1px solid var(--ia-glass-border);
}

.ia-ai-banner-inner {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 768px) {
  .ia-ai-banner-inner { grid-template-columns: 1fr 1fr; }
}

.ia-ai-banner-text h2 { color: #fff; font-size: 1.75rem; margin: 0.5rem 0 1rem; }
.ia-ai-banner-text p { color: var(--ia-muted); margin-bottom: 1.5rem; }

.ia-ai-preview { padding: 1.5rem; }
.ia-ai-msg {
  padding: 0.75rem 1rem;
  border-radius: 12px;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
  line-height: 1.5;
}

.ia-cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

@media (max-width: 640px) {
  .ia-hero-stats { grid-template-columns: repeat(2, 1fr); }
}

/* Topic pages */
.ia-topic-wrap { padding-top: 7rem; }

.ia-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--ia-muted);
  margin-bottom: 2rem;
}

.ia-breadcrumb a { color: var(--ia-cyan); }

.ia-topic-header {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  margin-bottom: 3rem;
}

.ia-topic-icon { font-size: 4rem; line-height: 1; }

.ia-topic-level {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--ia-cyan);
  margin-bottom: 0.5rem;
}

.ia-topic-header h1 {
  color: #fff;
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0 0 1rem;
}

.ia-topic-overview {
  color: var(--ia-muted);
  font-size: 1.1rem;
  line-height: 1.7;
  max-width: 720px;
}

.ia-topic-section { margin-bottom: 3rem; }
.ia-topic-section h2 { color: #fff; font-size: 1.5rem; margin-bottom: 1.25rem; }

.ia-concept-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.ia-concept-tag {
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  background: rgba(59,130,246,0.15);
  border: 1px solid rgba(59,130,246,0.3);
  color: #fff;
  font-size: 0.85rem;
}

.ia-lessons-list { display: grid; gap: 1rem; }

.ia-lesson-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1.25rem 1.5rem;
}

.ia-lesson-num {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(59,130,246,0.2);
  border-radius: 50%;
  color: var(--ia-cyan);
  font-weight: 700;
}

.ia-lesson-card h3 { color: #fff; margin: 0 0 0.25rem; font-size: 1rem; }
.ia-lesson-card p { color: var(--ia-muted); margin: 0; font-size: 0.875rem; }
.ia-lesson-status { color: var(--ia-muted); font-size: 0.8rem; white-space: nowrap; }

.ia-related-topics { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.ia-topic-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--ia-glass-border);
}

/* 404 */
.ia-404 { padding: 8rem 0 4rem; }
.ia-404-code { font-size: 6rem; font-weight: 800; color: rgba(255,255,255,0.1); display: block; line-height: 1; }
.ia-404 h2 { color: #fff; margin: 0 0 1rem; }
.ia-404-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem; margin: 2rem 0; }

@media (max-width: 640px) {
  .ia-topic-header { flex-direction: column; }
  .ia-lesson-card { grid-template-columns: auto 1fr; }
  .ia-lesson-status { display: none; }
}

/* Full lesson content */
.ia-lesson-full { grid-template-columns: auto 1fr; align-items: start; }
.ia-lesson-content { min-width: 0; }
.ia-lesson-desc { color: var(--ia-cyan); font-size: 0.9rem; margin: 0.25rem 0 0.75rem; }
.ia-lesson-body { color: var(--ia-muted); font-size: 0.9rem; line-height: 1.7; padding-top: 0.75rem; border-top: 1px solid var(--ia-glass-border); }
.ia-takeaways li { line-height: 1.6; }

/* Learn hub */
.ia-page-header { margin-bottom: 2rem; }
.ia-page-header h1 { color: #fff; font-size: 2.5rem; margin: 0.5rem 0; }
.ia-page-header p { color: var(--ia-muted); max-width: 720px; }
.ia-learn-levels { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 2rem; }
.ia-level-badge { padding: 0.4rem 1rem; border-radius: 999px; font-size: 0.8rem; font-weight: 600; }
.ia-level-beginner { background: rgba(34,197,94,0.15); color: #22c55e; border: 1px solid rgba(34,197,94,0.3); }
.ia-level-intermediate { background: rgba(59,130,246,0.15); color: var(--ia-cyan); border: 1px solid rgba(59,130,246,0.3); }
.ia-level-advanced { background: rgba(139,92,246,0.15); color: var(--ia-violet); border: 1px solid rgba(139,92,246,0.3); }

/* Encyclopedia search */
.ia-ency-search-wrap { margin-bottom: 2rem; }
.ia-ency-search { max-width: 100%; width: 100%; }

/* Compare columns */
.ia-compare-full { padding: 1.75rem; }
.ia-compare-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin: 1.5rem 0; }
.ia-compare-list { list-style: none; padding: 0; margin: 0; }
.ia-compare-list li { padding: 0.4rem 0; color: var(--ia-muted); font-size: 0.875rem; line-height: 1.5; }
.ia-vs-badge { background: rgba(59,130,246,0.2); padding: 0.25rem 0.75rem; border-radius: 999px; font-size: 0.75rem; color: var(--ia-cyan); }

/* Career cards */
.ia-career-card { padding: 1.75rem; }
.ia-career-meta { color: var(--ia-cyan); font-size: 0.875rem; margin: 0.5rem 0; }
.ia-career-desc { color: var(--ia-muted); font-size: 0.9rem; line-height: 1.6; margin: 0.75rem 0; }
.ia-career-skills, .ia-career-certs { font-size: 0.85rem; color: var(--ia-muted); margin: 0.5rem 0; }
.ia-career-skills strong, .ia-career-certs strong { color: #fff; }
.ia-career-steps { padding-left: 1.25rem; margin: 1rem 0 0; }
.ia-career-steps li { color: var(--ia-muted); font-size: 0.875rem; padding: 0.35rem 0; line-height: 1.5; }

/* Simulators */
.ia-simulator-section h2 { color: #fff; margin: 0 0 0.75rem; }

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

/* Floating Ask AI button */
.ia-fab-ai {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 999;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: linear-gradient(135deg, var(--ia-primary), var(--ia-violet));
  color: #fff !important;
  border-radius: 999px;
  box-shadow: 0 8px 32px rgba(59,130,246,0.4);
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}

.ia-fab-ai:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(59,130,246,0.5); color: #fff !important; }
.ia-fab-icon { font-size: 1.1rem; }

/* ===== MOBILE RESPONSIVE ===== */

@media (max-width: 900px) {
  .menu-toggle { display: none; }

  .header-inner {
    flex-wrap: wrap;
    min-height: 64px;
    position: relative;
    gap: 0.5rem;
    padding: 0.65rem 0;
  }

  .site-branding {
    flex: 1;
    min-width: 0;
  }

  .ia-logo {
    max-width: calc(100vw - 120px);
  }

  .ia-logo-img,
  .custom-logo {
    height: 30px;
    max-width: min(180px, 48vw);
  }

  .primary-navigation {
    display: block;
    order: 4;
    width: 100%;
    flex-basis: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .primary-navigation::-webkit-scrollbar { display: none; }

  .primary-menu {
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 0.35rem;
    width: max-content;
    min-width: 100%;
  }

  .primary-menu a {
    display: block;
    padding: 0.55rem 0.85rem;
    font-size: 0.85rem;
    min-height: 40px;
    white-space: nowrap;
  }

  .header-actions .btn-sm { display: none; }

  .hero-section.ia-hero { min-height: auto; padding: 5rem 0 3rem; }
  .ia-hero-enhanced { padding: 5.5rem 0 2.5rem; }

  .hero-title { font-size: clamp(2rem, 8vw, 3rem); }
  .hero-subtitle { font-size: 1rem; }

  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; min-height: 48px; }

  .ia-hero-stats { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
  .ia-hero-stat .ia-stat-num { font-size: 1.25rem; }

  .ia-float-card { display: none; }
  .ia-globe-wrap { max-width: 320px; }

  .ia-hero-flow { margin-top: 2rem; padding: 1.25rem; overflow: hidden; }
  .ia-flow-steps {
    flex-direction: column;
    align-items: stretch;
    min-width: 0;
  }
  .ia-flow-arrow { display: none; }
  .ia-flow-step { min-width: 0; width: 100%; }

  .section, .ia-section { padding: 3rem 0; }
  .ia-cta-section { padding: 3rem 0; }
  .ia-section-head { margin-bottom: 2rem; }

  .two-col { grid-template-columns: 1fr; }
  .ia-simulator-preview .section-title.text-left { text-align: center; }

  .ia-ai-banner-text h2 { font-size: 1.5rem; }
  .ia-ai-banner-text .btn { width: 100%; }

  .ia-cta-buttons { flex-direction: column; align-items: stretch; }
  .ia-cta-buttons .btn { width: 100%; min-height: 48px; }

  .ia-trust-inner { flex-direction: column; align-items: center; gap: 0.75rem; }

  .ia-page { padding: 5rem 0 2.5rem; }
  .ia-topic-wrap { padding-top: 5rem; }
  .page-header h1, .ia-page-header h1 { font-size: clamp(1.75rem, 6vw, 2.25rem); }

  .ia-topic-header { flex-direction: column; gap: 1rem; }
  .ia-topic-icon { font-size: 3rem; }
  .ia-topic-cta { flex-direction: column; }
  .ia-topic-cta .btn { width: 100%; min-height: 48px; }

  .ia-lesson-full { grid-template-columns: 1fr; padding: 1rem; }
  .ia-lesson-num { margin-bottom: 0.5rem; }

  .ia-vs { flex-direction: column; text-align: center; gap: 0.5rem; }
  .ia-compare-columns { grid-template-columns: 1fr; }

  .ia-dns-controls { flex-direction: column; }
  .ia-dns-controls .btn { width: 100%; min-height: 44px; }

  .ia-input { max-width: 100%; font-size: 16px; /* prevents iOS zoom */ }

  .ia-chat-form { flex-direction: column; }
  .ia-chat-form .btn { width: 100%; min-height: 44px; }
  .ia-chat-msg { max-width: 95%; }

  .ia-tools-body { display: flex; flex-direction: column; gap: 0.75rem; }
  .ia-tools-body .btn { width: 100%; min-height: 44px; }
  .ia-tool-tab { flex: 1 1 calc(50% - 0.5rem); min-height: 44px; font-size: 0.8rem; }

  .ia-quiz { max-width: 100%; }
  .ia-quiz-option { min-height: 48px; padding: 1rem; }

  .ia-footer { padding: 2.5rem 0 1.5rem; padding-bottom: calc(1.5rem + env(safe-area-inset-bottom)); }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-legal { display: flex; gap: 1rem; justify-content: center; }

  .ia-404 { padding: 6rem 0 3rem; }
  .ia-404-code { font-size: 4rem; }

  .ia-fab-ai {
    bottom: calc(1rem + env(safe-area-inset-bottom));
    right: 1rem;
    padding: 0.65rem 1rem;
    font-size: 0.8rem;
  }

  .ia-scroll-indicator { display: none; }

  .cta-inner h2 { font-size: 1.5rem; }
  .cta-inner .btn { width: 100%; margin: 0.35rem 0; min-height: 48px; }

  .ia-step-card { padding: 1.5rem; }
  .ia-mastery-card, .ia-compare-full, .ia-career-card { padding: 1.25rem; }

  .ia-simulator-section { padding: 1.25rem !important; margin-bottom: 1.25rem !important; }

  .ia-section-cta .btn { width: 100%; min-height: 48px; }
}

@media (max-width: 480px) {
  .container { width: min(100% - 1.25rem, var(--wh-container)); }

  .ia-hero-pills { gap: 0.35rem; }
  .ia-pill { font-size: 0.75rem; padding: 0.35rem 0.7rem; }

  .ia-hero-stats { grid-template-columns: 1fr 1fr; }
  .ia-badge { font-size: 0.75rem; padding: 0.3rem 0.75rem; }

  .ia-logo-mark { width: 28px; height: 28px; font-size: 0.65rem; }

  .ia-stat-number { font-size: 1.5rem; }
  .ia-stats-panel { grid-template-columns: 1fr 1fr; }

  .ia-fab-text { display: none; }
  .ia-fab-ai { padding: 0.75rem; border-radius: 50%; width: 52px; height: 52px; justify-content: center; }

  .ia-suggestion { font-size: 0.7rem; padding: 0.5rem 0.65rem; min-height: 36px; }

  .ia-learn-levels { flex-direction: column; }
  .ia-level-badge { text-align: center; }

  .hero-actions .btn-lg { padding: 0.85rem 1.25rem; font-size: 0.95rem; }
}

@media (max-width: 900px) {
  body.menu-open { overflow: hidden; }
}

/* ===== HOMEPAGE v2.8 ===== */
.ia-section-head-center { max-width: 680px; margin-left: auto; margin-right: auto; }

.ia-home-topics .ia-card-grid {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 1.25rem;
}

.ia-home-topics .ia-learn-card {
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.ia-home-topics .ia-learn-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 211, 238, 0.35);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.ia-steps-compact .ia-step-card {
  padding: 1.75rem;
  background: rgba(255, 255, 255, 0.02);
}

.ia-home-dns .ia-simulator-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.ia-why-grid {
  align-items: center;
  gap: 3rem;
}

.ia-why-lead {
  font-size: 1.05rem;
  max-width: 520px;
}

.ia-feature-list-compact li {
  padding: 0.85rem 0;
}

.ia-stats-panel-home {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--ia-glass-border);
  border-radius: var(--wh-radius);
}

.ia-stats-panel-home .ia-stat-item {
  text-align: center;
  padding: 1.25rem 0.75rem;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.ia-stats-panel-home .ia-stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--ia-cyan);
  line-height: 1.2;
}

.ia-stats-panel-home .ia-stat-label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--ia-muted);
}

.ia-cta-final {
  background:
    radial-gradient(ellipse at 50% 0%, rgba(59, 130, 246, 0.2), transparent 55%),
    var(--ia-bg-surface);
  border-top: 1px solid var(--ia-glass-border);
}

.ia-cta-final .cta-inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.ia-cta-final h2 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  color: #fff;
  margin-bottom: 0.75rem;
}

.ia-cta-final p {
  color: var(--ia-muted);
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

.ia-trust-item span[aria-hidden="true"] {
  font-size: 1.1rem;
}

.ia-trust-item {
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: #e2e8f0;
  font-weight: 500;
}

.ia-home-faq {
  max-width: 760px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .ia-why-grid .section-title.text-left,
  .ia-home-dns .section-title.text-left {
    text-align: center;
  }

  .ia-home-dns .ia-simulator-copy {
    text-align: center;
    align-items: center;
  }

  .ia-home-dns .ia-check-list {
    text-align: left;
    display: inline-block;
  }

  .ia-stats-panel-home {
    grid-template-columns: 1fr 1fr;
  }
}