body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #0b0d12;
  color: #e6faff;
}

.hero {
  text-align: center;
  padding: 4rem 1rem;
  position: relative;
}

.hero h1 {
  font-size: 3rem;
  color: #00eaff;
  text-shadow: 0 0 20px rgba(0, 234, 255, 0.4);
  animation: neonPulse 3s ease-in-out infinite;
}

@keyframes neonPulse {
  0% { text-shadow: 0 0 20px rgba(0, 234, 255, 0.4); }
  50% { text-shadow: 0 0 40px rgba(0, 234, 255, 0.8); }
  100% { text-shadow: 0 0 20px rgba(0, 234, 255, 0.4); }
}

.versions-grid {
  display: grid;
  gap: 2rem;
  padding: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.card {
  background: #11141c;
  border: 1px solid #1f2330;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0, 255, 255, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 30px rgba(0, 255, 255, 0.2);
}

.card h2 {
  color: #00eaff;
  margin-bottom: 0.5rem;
}

.btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.75rem 1.25rem;
  background: #00eaff;
  color: #000;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
}

.site-header, .site-footer {
  padding: 1.5rem 2rem;
  background: #0f1218;
  border-bottom: 1px solid #1f2330;
  text-align: center;
}

.site-header a {
  color: #00eaff;
  margin: 0 1rem;
  text-decoration: none;
  font-weight: 600;
}

.site-footer {
  border-top: 1px solid #1f2330;
  margin-top: 4rem;
  color: #6f7a8a;
}