.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero .stat-card,
.features-section .feature-card,
.smart-section .smart-card {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero .stat-card:hover,
.features-section .feature-card:hover,
.smart-section .smart-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 30px 60px rgba(20, 16, 34, 0.18);
}