Change cart icon on a single page

Site URL: https://falcon-lavender-b2h4.squarespace.com/

Hi guys!
How do I change the cart icon from white to black on individual pages? Since I have a dynamic header, the white icon is not visible on a white background.

https://falcon-lavender-b2h4.squarespace.com/
Password - support
 

Add to Page Header

<style>
  header#header .icon--cart {
    filter: invert(1);
}
span.sqs-cart-quantity {
    color: white;
}

</style>

1 hour ago, tuanphan said:

Add to Page Header

<style>
  header#header .icon--cart {
    filter: invert(1);
}
span.sqs-cart-quantity {
    color: white;
}

</style>

 

Thank you so much!  ☺️ It's work perfectly!