I want to make a button that has this highlight effect when the user hovers over it that works with rounded corners. (Effect is the second button)

HTML

<button class="btn-2"><span>Hover Me</span></button>

CSS

.btn-2::before, .btn-2::after{
  transition-delay: 0s;
}
.btn-2 span::before, .btn-2 span::after{
  transition-delay: 0.2s;
}
.btn-2::before{
  right: 0;
  top: 0;
}
.btn-2::after{
  left: 0;
  bottom: 0;
}
.btn-2 span::before{
  left: 0;
  top: 0;
}
.btn-2 span::after{
  right: 0;
  bottom: 0;
}
.btn-2:hover::before, .btn-2:hover::after{
  transition-delay: 0.2s;
}
.btn-2:hover span::before, .btn-2:hover span::after{
  transition-delay: 0s;
}

I have been unable to successfully make the effect work for a curved button

Thank you for any help