Custom Font Kerning

I'm building my website and used a custom font for my buttons using the following code:

}
#siteWrapper.site-wrapper .sqs-block-button-element {
    font-family: "luminaire" !important;
}
#siteWrapper.site-wrapper .sqs-block-button-element {
    font-size: 1.8rem !important;
}

However, as you can see, the kerning is all wrong and makes the cursive disconnect. Does anyone know what code I can add to this snippet to adjust the kerning?

https://aqua-amethyst-t4gd.squarespace.com/

Password: password

@simon Thanks a ton! That worked.