Font color and size on form

Site URL: https://paigejohnsen.squarespace.com/contact-1

I'm having issues with the font size and color on my contact form using the Sonny Template. Is there a way to change the font color, so it's visible? It's white and cannot be seen. The font is also extremely large and I would prefer for it to look like this page: https://www.jordannelsonproductions.com/contact

Have you tried finding in Site Styles yet?

If you can't find setting, add this to Home > Design > Custom CSS

.form-wrapper .field-list {
    color: black;
    font-size: 15px;
}