Transparent Header

I have set my header background to dynamic already, but I can't get it transparant over my full width image. What can I do?

Kind regards, Michel.

https://nonagon-polygon-6927.squarespace.com/light-photo

PW of the site is granite!23

Try enable Header Fixed or adding to Design > Custom CSS

article section:first-child {
    padding-top: 0px !important;
}