DKO

Hi All, From what I understand (and i dont know much) there is no header on Forte, but I have a navigation bar linked to anchors on my one-page site. I'd love the navigation bar and site text to fix at the top of the page so people dont have to scroll up or down. Could anyone help me with a CSS or code for this? This is primarily for desktop as the mobile version is fine with the hamburger. site is www.dkotto.co.nz and password is GANDER Many thanks