Removing Navigation on a particular page

Site URL: https://www.atanasmalamov.com/the-perfect-ballroom-dance-frame

Hi guys, I have used this code before:

<style> #header {display: none !important;</style>

to remove header form a page. But since switching to Brine, it is not working anymore. My goal is hide the navigation on this particular page to serve as a landing page. 

Thank you very much and Im sorry if a solution exists on the forum.

Hide Header or Hide Navigation?

Header uses this code

<style>

header.Header.Header--top {
    display: none !important;
}

</style>

That worked! Thank you so much Tuan Phan!