body {
  background-color: #f8f9fa;
}

.category-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.category-icon {
  font-size: 2rem;
}

.calc-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.calc-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.calc-icon {
  font-size: 1.5rem;
  font-weight: 700;
  color: #4f6ef7;
}