How do I hide the Navigation bar in 7.1 using Degraw template?

Site URL: https://www.bluekoilimited.com/home-test

Hey Guys, How do I hide the Navigation bar in 7.1 using Degraw template?

Try this out

To do on a single page, click on the gear icon, advance, insert code 

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

To do on all pages. Navigate to design, custom CSS & paste below.
 

#header {
display: none !important;
}

Thanks so much Ricardo Bautista it worked like a bomb!