Font color in text entry is “grayed out” and illegible.

I notice the following. When I type into an input box or text area anywhere on the website, the text font color appears to be "grayed out" and is illegible. If I click away from the input area, the text is in a darker color and is more visible. If I click back into the input area, it goes back into the "grayed out" state. It is occurring in several contexts, basically wherever there is a place to enter text on the website. It occurs in text entry options in the online store using one plug-in and also on online forms using another plug-in. It doesn't occur with other themes. I tried also removing all the custom CSS code I have entered under Customization/Additional CSS. This had no effect. You can see this behavior for yourself on this page: input boxes and text areas at this URL:  https://www.everygoodgift.org/product-search/ Ideally, I would use the same dark color, even black text on a white background. Can you help me?