Harlowe - How do i make text disappear when you hover over it?

Question

When hovering over a word i want it to disappear?

Answer 1

In passage: 

<span class="invis-hover">spooooooky</span>

In stylesheet: 

.invis-hover:hover {
    color: rgba(0, 0, 0, 0);
}

Note that hover effects are not mobile-friendly.