button, .btn {
  transition: transform 0.2s ease-in-out;
}
button:hover, .btn:hover {
  transform: translateY(-3px);
}

[data-aos] {
  opacity: 0;
  transition-property: opacity, transform;
  transition-duration: 0.6s;
}
[data-aos].aos-animate {
  opacity: 1;
}