Quincy Template - User feedback when hovering projects?

Site URL: https://www.madebyrach.net/portfolio

I am trying to get my projects in my portfolio to underline or fade (words get slightly transparent) when hovered over. I am using the Quincy template.  I've put my website in for your reference; if it takes you to the Home page for some reason, just navigate to my Portfolio and when you hover over my various projects, it doesn't give any user feedback - it just stays white.

Is there any way I can inject code or use CSS to customize this?

Thank you!

-Rachel

Add to Home > Design > Custom CSS

/* Portfolio underline */
span.portfolio-hover-item-content:hover {
    text-decoration: underline;
}