[Theme: Spacious] Hide header on a specific page

Hello!

First of all, thanks to the developer for the awesome free theme.

I would like to hide the header section only on a specific page, but there must be something wrong with the CSS I put into the editor.

This is the page on which I would like to hide the header: https://www.xilotech.net/privacy

And this is the bit of code in my CSS:

.page-id-94 #header-text-nav-container {
    display: none;
}

Could anybody point to what I am doing wrong? Thanks!