Try to find the stylesetting in the theme settings. Also your links on the productpage are white, so the category and tag links aren’t either “displaying” properly
]]>/* Fix Single product page CSS */
.shopengine-quick-checkout-button:hover{
color: black !important;
}
.shopengine-quick-checkout-button{
background-color: black !important;
}
.shopengine-quick-checkout-button:hover{
background-color: white !important;
}
Here’s a guide you can check on how to add custom CSS to a theme.
Hope this helps!
]]>