Changing product title to custom font

Site URL: https://ray-quillfish-psl3.squarespace.com/

Hello,

I've uploaded a font and added it to my custom CSS based on a step-by-step article I found. I have no knowledge in coding, but I do this to most of my sites and it always works. I have set all my headers to be in this custom font but on my product page, the product title is still set to the default heading font that is not used anywhere on my site. I hope this makes sense and hope someone can help!

See images attached!

Individual product titles use this class name

h1.ProductItem-details-title

Thank you! I found your response on another forum using this code and it worked!

h1.ProductItem-details-title {
    font-family: 'ojo regular' !important;
}